Double-layer tunnel chain net system of liquid nitrogen quick freezer

Abstract

The utility model relates to liquid nitrogen quick freezing device technical field discloses a kind of liquid nitrogen quick freezer double-layer tunnel chain net system, including assembly box, the partition board is fixedly connected in the assembly box;The left chamber of assembly box is processing cavity, and the right chamber of assembly box is storage cavity;The device configuration integrated mobile structure and double-layer reverse chain net system: material quick freezing operation, quick freezer is integrated in container and is carried on trailer, and can be flexibly transferred to food production site and carry out operation;No. 1 conveyor belt and no. 2 conveyor belt are reverse operation design, material is sent into no. 1 conveyor belt from front end feeding hopper, continue quick freezing by directional transfer to no. 2 conveyor belt below, double-layer reverse layout not only prolongs the quick freezing path of material in processing cavity, guarantees large particle material freeze-through effect, but also greatly reduces the overall length of equipment by compact design.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid nitrogen quick-freezing devices, and in particular to a double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine. Background Technology

[0002] A tunnel-type liquid nitrogen quick-freezing machine is a food rapid freezing device based on the extremely low temperature characteristics of liquid nitrogen. It is used to preserve food and extend its shelf life. Its working principle is that when liquid nitrogen comes into contact with food, it rapidly vaporizes and absorbs a large amount of heat, causing the internal temperature of the food to drop below the freezing point in a short time, inhibiting the growth of microorganisms and the loss of nutrients. The equipment continuously transports food into the quick-freezing chamber through core components such as a conveyor belt, realizing batch and continuous freezing operations. The stability of the freezing environment is generally ensured by a fixedly installed machine structure.

[0003] However, existing tunnel-type liquid nitrogen quick-freezing machines are mostly designed for fixed installation within factory buildings, with core transmission components and mesh chain structures typically having a single-layer layout, resulting in significant limitations. Specifically, the fixed installation mode restricts the operation area to the food processing plant, making it difficult to move to food production sites and other on-site environments. This makes it difficult to meet the demand for immediate freezing of fresh agricultural products after harvesting, easily leading to quality degradation due to excessive transportation time or untimely freezing. Furthermore, the single-layer mesh chain structure results in a large overall footprint, increasing site investment costs and significantly restricting equipment placement due to limited space, greatly limiting the expansion of quick-freezing technology's application scenarios. Therefore, those skilled in the art have proposed a mobile double-layer liquid nitrogen quick-freezing machine to address the problems mentioned in the background. Utility Model Content

[0004] Purpose of the utility model: The purpose of this utility model is to provide a double-layer tunnel chain network system for liquid nitrogen quick-freezing machines to solve the above-mentioned shortcomings in the prior art.

[0005] Technical solution: Includes an assembly box, with a partition fixedly connected inside the assembly box; the left chamber of the assembly box is a processing chamber, and the right chamber of the assembly box is a storage chamber; a conveyor belt assembly is fixedly connected inside the assembly box, and the conveyor belt assembly is located inside the processing chamber; a liquid nitrogen storage device is fixedly connected inside the assembly box, and the liquid nitrogen storage device is located inside the storage chamber.

[0006] The conveyor belt assembly includes a first conveyor belt and a second conveyor belt; the first conveyor belt is located above the second conveyor belt; both the first and second conveyor belts are fixedly connected to the inner wall of the assembly box by bolt assemblies.

[0007] As a further description of the above technical solution: the second conveyor belt is offset horizontally to the left relative to the first conveyor belt; guide plates are fixedly connected to both sides of the upper end face of the shells of the first and second conveyor belts.

[0008] As a further description of the above technical solution: the front end of the assembly box is rotatably connected to an inspection door via a hinge, and a feeding hopper corresponding to the first conveyor belt is fixedly connected to the inspection door; the wall of the assembly box is a double-layer insulation structure, and the double-layer insulation structure is filled with high-efficiency heat insulation material; a low-temperature resistant silicone sealing strip is fixedly connected to the inner edge of the inspection door, and a locking handle is provided between the inspection door and the assembly box.

[0009] As a further description of the above technical solution: the front end face of the assembly box is also connected to a material picking door corresponding to the second conveyor belt via a hinge.

[0010] As a further description of the above technical solution: the liquid nitrogen storage device includes a liquid nitrogen storage tank, and the liquid nitrogen storage tank is evenly arranged in two layers along the vertical direction; a nozzle is fixedly connected to the left end of each liquid nitrogen storage tank, and the spray direction of the nozzle is towards the inside of the processing cavity of the assembly box; the nozzle penetrates the partition inside the assembly box; the liquid nitrogen storage tank is fixedly connected to the inner wall of the assembly box through a threaded assembly.

[0011] As a further description of the above technical solution: an exhaust fan is fixedly connected to the upper end face of the assembly box, and the exhaust fan penetrates the inner top surface of the assembly box; the exhaust fan is located directly above the first conveyor belt.

[0012] As a further description of the above technical solution: a comprehensive control panel is fixedly connected to the right end face of the assembly box, and the comprehensive control panel is electrically connected to the control and execution components of the conveyor belt assembly, the liquid nitrogen storage device, and the exhaust fan respectively; a correspondingly configured cryogenic solenoid valve is fixedly connected to the pipeline at the rear end of the nozzle, and the cryogenic solenoid valve is electrically connected to the comprehensive control panel; the outer end face of the comprehensive control panel penetrates through the right end face of the assembly box; a nitrogen concentration sensor and a temperature sensor are fixedly connected to the processing cavity of the assembly box, and both the nitrogen concentration sensor and the temperature sensor are electrically connected to the comprehensive control panel.

[0013] As a further description of the above technical solution: a storage plate is fixedly connected to the upper end face of the assembly box, and a sunshade is slidably inserted into the storage plate; a handle is fixedly connected to the outer end face of the sunshade; the storage plate and the sunshade are symmetrically arranged about the center of the assembly box; a folding table is rotatably connected to the left end face of the assembly box via a hinge, and the folding table has folding support legs inside.

[0014] Beneficial effects:

[0015] 1. This device features an integrated mobile structure and a double-layer reverse chain network system: During material quick-freezing operations, the entire quick-freezing machine is integrated into a container and mounted on a trailer, allowing for flexible transport to food production sites. The first and second conveyor belts operate in opposite directions. After material is fed into the first conveyor belt from the front hopper, it is directionally transferred to the second conveyor belt below for further quick-freezing. This double-layer reverse layout extends the quick-freezing path of the material within the processing chamber, ensuring thorough freezing of large particles, while also significantly reducing the overall length of the equipment through a compact design. Combined with flexible mobility and a rational transmission path planning, it can meet the immediate quick-freezing needs of production sites, preventing quality degradation of agricultural products due to freezing delays. This helps liquid nitrogen quick-freezing machines overcome site constraints and significantly expand their application scenarios.

[0016] 2. By incorporating a liquid nitrogen storage device and integrated control structure, during material quick-freezing, the layered liquid nitrogen storage tanks inject liquid nitrogen directionally into the processing chamber through nozzles. The integrated control panel receives signals from temperature sensors and nitrogen concentration sensors, and precisely controls the operation of the cryogenic solenoid valve, conveyor belt assembly, and exhaust fan. This enables coordinated regulation of the liquid nitrogen injection volume, transmission speed, and internal environment of the chamber. Precise control and coordinated operation ensure the quick-freezing effect and operational safety, which is conducive to the intelligent and stable operation of the liquid nitrogen quick-freezing machine. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine proposed in this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the sunshade and folding table of this utility model when unfolded;

[0019] Figure 3 This is a three-dimensional structural diagram showing the connection between the integrated control panel and the assembly box of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the connection between the assembly box and the material handling door of this utility model.

[0021] Figure 5 This is a three-dimensional structural diagram of the connection between the conveyor belt assembly and the liquid nitrogen storage device of this utility model;

[0022] Figure 6 for Figure 5 A magnified diagram of region A in the image.

[0023] Legend: 1. Assembly box; 2. Conveyor belt assembly; 21. Conveyor belt No. 1; 22. Conveyor belt No. 2; 23. Material handling gate; 24. Guide plate; 25. Feeding hopper; 3. Liquid nitrogen storage device; 31. Liquid nitrogen storage tank; 32. Nozzle; 33. Exhaust fan; 4. Inspection door; 42. Locking handle; 5. Integrated control panel; 6. Sunshade; 7. Folding table. Detailed Implementation

[0024] To make the technical solution of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Reference Figures 1-6 A double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine includes an assembly box 1, with partitions fixedly connected inside the assembly box 1; the left chamber of the assembly box 1 is a processing chamber, and the right chamber of the assembly box 1 is a storage chamber; a conveyor belt assembly 2 is fixedly connected inside the assembly box 1, and the conveyor belt assembly 2 is located inside the processing chamber; a liquid nitrogen storage device 3 is fixedly connected inside the assembly box 1, and the liquid nitrogen storage device 3 is located inside the storage chamber.

[0026] The conveyor belt assembly 2 includes a first conveyor belt 21 and a second conveyor belt 22; the first conveyor belt 21 is located above the second conveyor belt 22; both the first conveyor belt 21 and the second conveyor belt 22 are fixedly connected to the inner wall of the assembly box 1 by bolt assemblies; the second conveyor belt 22 is offset horizontally to the left relative to the first conveyor belt 21; guide plates 24 are fixedly connected to both sides of the upper end face of the shells of the first conveyor belt 21 and the second conveyor belt 22; the front end face of the assembly box 1 is hinged to a maintenance door 4, and a feeding hopper 25 corresponding to the first conveyor belt 21 is fixedly connected to the maintenance door 4; the box wall of the assembly box 1 is a double-layer insulation structure, and the double-layer insulation structure is filled with high-efficiency heat insulation material; a low-temperature resistant silicone sealing strip is fixedly connected to the inner edge of the maintenance door 4, and a locking handle 42 is provided between the maintenance door 4 and the assembly box 1; the front end face of the assembly box 1 is also hinged to a material receiving door 23 corresponding to the second conveyor belt 22.

[0027] Specifically, by setting up an integrated structure with layered liquid nitrogen supply, double-layer staggered reverse transmission and intelligent control, when performing material quick-freezing operations, the integrated control panel 5 is operated first, and a control signal is sent to open the corresponding low-temperature solenoid valve in the liquid nitrogen storage device 3; the liquid nitrogen storage tanks 31, which are evenly arranged in the upper and lower layers, then spray liquid nitrogen directionally into the processing chamber of the assembly box 1 through the nozzle 32 penetrating the partition at the left end, so as to pre-build a stable low-temperature environment for material quick-freezing; then, through the feeding hopper 25 on the inspection door 4 corresponding to the first conveyor belt 21, the material to be quick-frozen is evenly fed onto the upper end of the first conveyor belt 21; after being conveyed by the first conveyor belt 21, the material falls accurately onto the second conveyor belt 22, which is staggered and runs in the opposite direction below, under the auxiliary guidance of the guide plate 24; the second conveyor belt 22 has the opposite transmission direction to the first conveyor belt 21; after the second conveyor belt 22 completes the subsequent quick-freezing process, the frozen product is finally taken out from the material receiving door 23 on the front end of the assembly box 1 corresponding to the second conveyor belt 22.

[0028] Furthermore, the liquid nitrogen storage device 3 includes liquid nitrogen storage tanks 31, which are arranged in two evenly spaced layers vertically. Each liquid nitrogen storage tank 31 has a nozzle 32 fixedly connected to its left end, with the nozzle 32 spraying towards the processing cavity of the assembly box 1. The nozzle 32 penetrates the partition inside the assembly box 1. The liquid nitrogen storage tank 31 is fixedly connected to the inner wall of the assembly box 1 via a threaded assembly. An exhaust fan 33 is fixedly connected to the upper surface of the assembly box 1, penetrating the inner top surface of the assembly box 1. The exhaust fan 33 is located directly above the first conveyor belt 21. A comprehensive control panel 5 is fixedly connected to the right end of the assembly box 1, and the comprehensive control panel 5 is connected to the control panels of the conveyor belt assembly 2 and the liquid nitrogen storage device 3. The actuator and exhaust fan 33 are electrically connected; a corresponding cryogenic solenoid valve is fixedly connected to the pipeline at the rear end of the nozzle 32, and the cryogenic solenoid valve is electrically connected to the integrated control panel 5; the outer end face of the integrated control panel 5 penetrates the right end face of the assembly box 1; a nitrogen concentration sensor and a temperature sensor are fixedly connected to the processing cavity of the assembly box 1, and both the nitrogen concentration sensor and the temperature sensor are electrically connected to the integrated control panel 5; a storage plate is fixedly connected to the upper end face of the assembly box 1, and a sunshade 6 is slidably inserted into the storage plate; a handle is fixedly connected to the outer end face of the sunshade 6; the storage plate and the sunshade 6 are symmetrically arranged about the center of the assembly box 1; a folding table 7 is rotatably connected to the left end face of the assembly box 1 through a hinge, and the folding table 7 has folding support legs inside.

[0029] Specifically, during the quick-freezing operation, the quick-freezing temperature, time, and nitrogen concentration threshold parameters are preset through the integrated control panel 5. The temperature sensor and nitrogen concentration sensor inside the processing chamber of the assembly box 1 collect environmental data in real time and dynamically feed the signals back to the integrated control panel 5, forming a closed-loop control circuit. Based on the preset parameters and sensor feedback signals, the integrated control panel 5 precisely controls the opening of the cryogenic solenoid valve corresponding to the nozzle 32 in the liquid nitrogen storage device 3. The liquid nitrogen storage tanks 31, which are evenly arranged in the upper and lower layers, spray liquid nitrogen into the processing chamber through the nozzle 32 that penetrates the partition at the left end. The extremely low temperature characteristics of liquid nitrogen are used to quickly build a stable low temperature environment, and the spray range accurately covers the materials on the first conveyor belt 21 and the second conveyor belt 22 of the double-layer reverse staggered transmission, ensuring that the materials in the upper and lower layers can receive a uniform supply of cold energy.

[0030] As liquid nitrogen continues to be injected and vaporized, nitrogen gradually accumulates in the processing chamber. When the nitrogen concentration reaches the preset threshold, the integrated control panel 5 automatically starts the exhaust fan 33 to promptly discharge excess nitrogen outside the equipment, thus preventing safety hazards caused by excessive nitrogen concentration from the source. At the same time, the exhaust fan 33 is precisely positioned directly above the first conveyor belt 21, which can quickly extract nitrogen accumulated in the upper area and form a directional airflow to promote gas circulation between the upper and lower layers in the processing chamber, ensuring uniform temperature in the double-layer conveyor belt area and avoiding problems such as local accumulation or insufficient cooling.

[0031] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine, comprising an assembly box (1), characterized in that, The assembly box (1) is fixedly connected to a partition; the left chamber of the assembly box (1) is a processing chamber, and the right chamber of the assembly box (1) is a storage chamber; a conveyor belt assembly (2) is fixedly connected to the assembly box (1), and the conveyor belt assembly (2) is located in the processing chamber; a liquid nitrogen storage device (3) is fixedly connected to the assembly box (1), and the liquid nitrogen storage device (3) is located in the storage chamber; The conveyor belt assembly (2) includes a first conveyor belt (21) and a second conveyor belt (22); the first conveyor belt (21) is located above the second conveyor belt (22); both the first conveyor belt (21) and the second conveyor belt (22) are fixedly connected to the inner wall of the assembly box (1) by bolt assemblies.

2. The double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine according to claim 1, characterized in that, The second conveyor belt (22) is offset to the left in a horizontal direction relative to the first conveyor belt (21); guide plates (24) are fixedly connected to both sides of the upper end face of the shell of the first conveyor belt (21) and the second conveyor belt (22).

3. The double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine according to claim 2, characterized in that, The front end of the assembly box (1) is connected to an inspection door (4) via a hinge, and a feeding hopper (25) corresponding to the first conveyor belt (21) is fixedly connected to the inspection door (4); the box wall of the assembly box (1) is a double-layer insulation structure, and the double-layer insulation structure is filled with high-efficiency heat insulation material; the inner edge of the inspection door (4) is fixedly connected to a low-temperature resistant silicone sealing strip, and a locking handle (42) is provided between the inspection door (4) and the assembly box (1).

4. The double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine according to claim 3, characterized in that, The front end of the assembly box (1) is also connected by a hinge to a material picking gate (23) corresponding to the second conveyor belt (22).

5. The double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine according to claim 1, characterized in that, The liquid nitrogen storage device (3) includes a liquid nitrogen storage tank (31), and the liquid nitrogen storage tank (31) is evenly arranged in two layers along the vertical direction; a nozzle (32) is fixedly connected to the left end of each liquid nitrogen storage tank (31), and the spray direction of the nozzle (32) is towards the processing cavity of the assembly box (1); the nozzle (32) penetrates the partition inside the assembly box (1); the liquid nitrogen storage tank (31) is fixedly connected to the inner wall of the assembly box (1) through a threaded assembly.

6. The double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine according to claim 5, characterized in that, An exhaust fan (33) is fixedly connected to the upper end face of the assembly box (1), and the exhaust fan (33) penetrates the inner top surface of the assembly box (1); the exhaust fan (33) is located directly above the first conveyor belt (21).

7. A double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine according to claim 6, characterized in that, The assembly box (1) is fixedly connected to a comprehensive control panel (5) on its right end face, and the comprehensive control panel (5) is electrically connected to the control execution components of the conveyor belt assembly (2), the liquid nitrogen storage device (3), and the exhaust fan (33). A corresponding cryogenic solenoid valve is fixedly connected to the pipeline at the rear end of the nozzle (32), and the cryogenic solenoid valve is electrically connected to the comprehensive control panel (5). The outer end face of the comprehensive control panel (5) penetrates the right end face of the assembly box (1). The processing chamber of the assembly box (1) is fixedly connected to a nitrogen concentration sensor and a temperature sensor, and both the nitrogen concentration sensor and the temperature sensor are electrically connected to the comprehensive control panel (5).

8. The double-layer tunnel chain network system for a liquid nitrogen quick-freezing machine according to claim 1, characterized in that, The upper end face of the assembly box (1) is fixedly connected to a storage plate, and a sunshade (6) is slidably inserted into the storage plate; a handle is fixedly connected to the outer end face of the sunshade (6); the storage plate and the sunshade (6) are symmetrically arranged about the center of the assembly box (1); a folding table (7) is rotatably connected to the left end face of the assembly box (1) through a hinge, and the folding table (7) has folding support legs inside.

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