Low-temperature quick freezing device based on partial freezing liquid quick freezing technology

Abstract

The utility model relates to the technical field of food processing equipment, in particular to a low-temperature quick freezing device based on a partial freezing liquid quick freezing technology, which comprises a refrigerator, a chain type conveying mechanism, a suspension bracket, a guide mechanism and a spraying mechanism, the chain type conveying mechanism is provided with a conveying chain, the conveying chain can control the connecting block to move in the refrigerator in the rotating process, a sliding block is arranged on the suspension bracket, and the suspension bracket can be quickly disassembled and assembled through the sliding block; hooks are arranged at the two ends of a supporting arm on the hanging frame, and meat products can be fixed through the hooks and can be fully unfolded; the guide mechanism is arranged on the moving path of the suspension bracket, and the suspension bracket can be controlled to rotate in the moving process through the guide mechanism, so that the spraying pipe of the spraying mechanism can fully spray to the surface of the meat product; through the structural design, the surface of the meat product can be sprayed, spraying is uniform, the automation degree is high, the working efficiency is improved, and the processing cost of the meat product is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of food processing equipment, in particular to a low-temperature quick-freezing device based on a micro-freezing liquid quick-freezing technology. Background Art

[0002] Micro-freezing liquid rapid freezing technology is a new type of biological freezing technology. Micro-freezing liquid rapid freezing technology combines low temperature technology, ultra-low temperature technology and a specific micro-freezing liquid ratio, and can quickly and directly freeze aquatic products or meat products. This technology can complete the freezing and preservation of food in a short time, usually within 6 to 30 minutes, which is much shorter than the time required by traditional freezing technology. Compared with traditional freezing technology, micro-freezing liquid rapid freezing technology can complete the freezing of food in a very short time, significantly shortening the freezing time; and during the freezing process, micro-freezing liquid can effectively protect food cells, prevent cell rupture, and maintain the freshness and nutrients of food; because the density of micro-freezing liquid is much higher than that of air, its thermal conductivity is also much higher than that of air, so it can more efficiently transfer freezing energy, save energy, and reduce environmental pollution; micro-freezing liquid rapid freezing technology can improve the taste and texture of food, extend the shelf life of products, and improve the overall quality of products. At present, micro-freezing liquid rapid freezing technology has gradually been applied to the field of meat processing.

[0003] The existing micro-freezing liquid rapid freezing technology usually uses a manual spray gun to spray the micro-freezing liquid onto the surface of the meat product for rapid freezing when freezing meat products. When freezing large livestock such as pigs and sheep, the existing spraying method is not only inefficient and uneven, but also difficult to operate manually in a low-temperature environment. Therefore, it is necessary to develop an automated rapid freezing device. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a low-temperature quick-freezing device based on micro-freezing liquid quick-freezing technology, which can spray the surface of meat products, spray evenly, have a high degree of automation, improve work efficiency, and reduce the processing cost of meat products.

[0005] According to an embodiment of the utility model, a low-temperature quick-freezing device based on micro-freezing liquid quick-freezing technology comprises:

[0006] Freezer;

[0007] A chain conveying mechanism, wherein a conveying chain is provided on the refrigerator, and a plurality of connecting blocks are linearly arranged in the length direction of the conveying chain;

[0008] A suspension frame, wherein a slider is disposed at the upper end of the suspension frame, and the slider is detachably connected to the connecting block; a support arm is rotatably disposed at the lower end of the slider, and hook components are disposed at both ends of the support arm;

[0009] A guide mechanism, wherein the guide mechanism is provided with a guide plate, the guide plate is provided on the moving path of the suspension frame, and the support arm can abut against the guide plate and rotate by a reaction force when moving;

[0010] A spray mechanism is provided with spray pipes on both sides of the conveying chain.

[0011] According to some embodiments of the utility model, a slide groove is provided on the connecting block; the slide groove is inclined to the horizontal plane, and the vertical height of the open end of the slide groove is higher than the closed end of the slide groove; the closed end of the slide groove is provided with a first stopper.

[0012] According to some embodiments of the utility model, the suspension frame includes a first U-shaped seat, a cross shaft and a second U-shaped seat; the upper end of the first U-shaped seat is fixedly connected to the slider, and the lower end of the first U-shaped seat is rotatably connected to the first axis of the cross shaft; the second axis of the cross shaft is rotatably connected to the second U-shaped seat; the lower end of the second U-shaped seat is rotatably connected to the support arm.

[0013] According to some embodiments of the utility model, the hook assembly includes a hinge block, a second block, a guide rod, a third block, a return spring and a hook; the hinge block is rotatably connected to the support arm, and the second block is fixedly connected to the hinge block; one end of the guide rod is slidably connected to the second block, and the other end of the guide rod is fixedly connected to the third block; the third block is fixedly connected to the hook; the return spring is sleeved on the guide rod, one end of the return spring is fixedly connected to the second block, and the other end of the return spring is fixedly connected to the third block.

[0014] According to some embodiments of the utility model, the hook assembly also includes a limiting rod and a limiting bolt; one end of the limiting rod is fixedly connected to the third stopper, and the other end of the limiting rod passes through the third stopper and is threadedly connected to the limiting bolt.

[0015] According to some embodiments of the utility model, the chain conveying mechanism includes a driving motor, a first sprocket, a second sprocket and a tensioning wheel; the first sprocket and the second sprocket are respectively arranged at two ends of the refrigerator, and the conveying chain is wound around the first sprocket and the second sprocket; the driving motor and the first sprocket are connected in transmission; the tensioning wheel abuts against the conveying chain.

[0016] According to some embodiments of the utility model, the guide mechanism includes a guide base and a connecting rod, one end of the guide base is fixedly connected to the chain conveying mechanism, the other end of the guide base is threadedly connected to one end of the connecting rod, and the other end of the connecting rod is rotatably and adjustably connected to the guide plate.

[0017] According to some embodiments of the utility model, the spray pipe is provided with an arc portion and a vertical portion; and a plurality of spray heads are provided on the spray pipe.

[0018] According to some embodiments of the present invention, a temperature insulation board is provided on the inner wall of the refrigerator.

[0019] According to some embodiments of the utility model, an air compressor is provided on the refrigerator; and a slot plate is provided inside the refrigerator.

[0020] According to the embodiment of the utility model, a low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology has at least the following beneficial effects:

[0021] According to the scheme of the utility model, the low-temperature quick-freezing device includes a refrigerator, a chain conveying mechanism, a hanging frame, a guiding mechanism and a spraying mechanism; the chain conveying mechanism is provided with a conveying chain, and the conveying chain can control the movement of the connecting block in the refrigerator during the rotation process, and a slider is provided on the hanging frame, and the hanging frame can be quickly disassembled and assembled through the slider; hooks are provided at both ends of the support arm on the hanging frame, and the meat products can be fixed through the hooks, and the meat products can be fully unfolded; a guiding mechanism is provided on the moving path of the hanging frame, and the hanging frame can be controlled to rotate during the movement through the guiding mechanism, so that the spray pipe of the spraying mechanism can fully spray to the surface of the meat product; through the design of this structure, the surface of the meat product can be sprayed, the spraying is uniform, the degree of automation is high, the work efficiency is improved, and the processing cost of the meat product is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of the utility model;

[0023] Figure 2 A structural schematic diagram of the chain conveying mechanism of the utility model;

[0024] Figure 3 A structural schematic diagram of a suspension bracket of the utility model;

[0025] Figure 4 For the utility model Figure 3 A schematic diagram of the enlarged local structure at A;

[0026] Figure 5 A partial structural schematic diagram of the suspension bracket of the utility model;

[0027] Figure 6 It is a schematic cross-sectional structure diagram of the suspension bracket of the utility model.

[0028] In the figure:

[0029] 100-freezer, 110-air compressor, 120-slot plate;

[0030] 200-chain conveying mechanism, 210-conveying chain, 220-connecting block, 221-sliding groove, 222-opening end, 223-sealing end, 224-first stopper, 230-driving motor, 240-first sprocket, 250-second sprocket, 260-tensioning wheel;

[0031] 300-suspension frame, 310-slider, 320-support arm, 330-hook assembly, 331-hinge block, 332-second block, 333-guide rod, 334-third block, 335-reset spring, 336-hook, 337-limit rod, 338-limit bolt, 340-first U-shaped seat, 350-cross shaft, 351-first shaft, 352-second shaft, 360-second U-shaped seat;

[0032] 400-guide mechanism, 410-guide plate, 420-base, 430-connecting rod;

[0033] 500-spraying mechanism, 510-spraying pipe, 511-arc-shaped portion, 512-vertical portion, 520-spraying head. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] Reference Figures 1 to 6 As shown, the utility model discloses a low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology, which includes a refrigerator 100, a chain conveying mechanism 200, a hanging frame 300, a guide mechanism 400 and a spray mechanism 500; wherein, the chain conveying mechanism 200 is provided with a conveying chain 210 on the refrigerator 100, and a plurality of connecting blocks 220 are linearly arranged in the length direction of the conveying chain 210; a slider 310 is provided at the upper end of the hanging frame 300, and the slider 310 and the connecting block 220 are detachably connected; a support arm 320 is rotatably provided at the lower end of the slider 310, and hook components 330 are respectively provided at both ends of the support arm 320; the guide mechanism 400 is provided with a guide plate 410, and the guide plate 410 is provided on the moving path of the hanging frame 300, and the support arm 320 can abut against the guide plate 410 and rotate by reaction force when moving; the spray mechanism 500 is provided with spray pipes 510 on both sides of the conveying chain 210.

[0039] Specifically, in the present embodiment, a refrigeration system is provided in the refrigerator 100, and the temperature in the refrigerator 100 can be controlled by the refrigeration system. Cabinet doors are provided at both ends of the refrigerator 100 along the conveying direction. In the present embodiment, door curtains are provided on the cabinet doors to maintain the temperature in the refrigerator 100 and avoid cold air loss. A chain conveying mechanism 200 is provided at the upper part of the refrigerator 100, and the chain conveying mechanism 200 is provided with a conveying chain 210. The chain part of the lower part of the conveying chain 210 is located inside the refrigerator 100. The conveying chain 210 is arranged with a plurality of connecting blocks 220 along its own length direction. The connecting blocks 220 and the conveying chain 210 are fixedly connected. When the chain rotates, the connecting blocks 220 can be driven to circulate in the refrigerator 100. The upper end of the hanging rack 300 is provided with a slider 310, and the slider 310 and the connecting block 220 are detachably connected. By providing the slider 310, the hanging rack 300 and the connecting block 220 can be quickly installed or removed; the hanging rack 300 is provided with a support arm 320, and the two ends of the support arm 320 are respectively provided with hook assemblies 330. When working, the meat product can be fixed by the hook assemblies 330. In this embodiment, by providing the structure of the hook assemblies 330 at the two ends of the support arm 320, the meat product can be fully unfolded, and then the hanging rack 300 is sent to the refrigerator 100 through the chain conveyor mechanism 200 for the spraying process and the freezing process. After the spraying process and the freezing process are completed, the meat product is removed from the refrigerator 100 by the chain conveyor mechanism 200 and sent to the next process. In this embodiment, the slider 310 and the support arm 320 are rotatably connected. By providing a guide mechanism 400 on the moving path of the suspension frame 300, the support arm 320 can gradually abut against the guide plate 410 during the movement, and the support arm 320 can be rotated under the control of the reaction force of the guide plate 410. Through the design of this structure, the meat product can be fully sprayed. In this embodiment, the spray mechanism 500 is provided with spray pipes 510 on both sides of the conveyor chain 210, and the micro-freezing liquid can be provided through the spray pipes 510, and the surface of the meat product can be fully sprayed. Through the design of this mechanism, the surface of the meat product can be sprayed, the spraying is uniform, the degree of automation is high, the work efficiency is improved, and the processing cost of the meat product is reduced.

[0040] In some embodiments of the utility model, a slide groove 221 is provided on the connecting block 220; the slide groove 221 is inclined to the horizontal plane, and the vertical height of the open end 222 of the slide groove 221 is higher than the sealing end 223 of the slide groove 221; the sealing end 223 of the slide groove 221 is provided with a first stopper 224. Specifically, in this embodiment, the chain conveying mechanism 200 adopts a step-by-step conveying mode; the slider 310 and the connecting block 220 are detachably connected; a slide groove 221 is provided on the connecting block 220, and the two ends of the slide groove 221 are respectively an open end 222 and a closed end 223. In this embodiment, the slide groove 221 is inclined, and the vertical height of the open end 222 of the slide groove 221 is higher than the closed end 223 of the slide groove 221; the open end 222 of the slide groove 221 faces the front end of the conveying direction; the closed end 223 of the slide groove 221 is provided with a first stopper 224; through the design of this structure, when the chain conveying mechanism 200 moves, the slider 310 can always abut against the first stopper 224; when the chain conveying mechanism 200 brakes, the inclined slide groove 221 can prevent the slider 310 from falling out of the slide groove 221. Through the design of this mechanism, the installation and removal of the suspension frame 300 are convenient.

[0041] In some embodiments of the utility model, the suspension bracket 300 includes a first U-shaped seat 340, a cross shaft 350 and a second U-shaped seat 360; the upper end of the first U-shaped seat 340 is fixedly connected to the slider 310, and the lower end of the first U-shaped seat 340 is rotatably connected to the first axis 351 of the cross shaft 350; the second axis 352 of the cross shaft 350 is rotatably connected to the second U-shaped seat 360; and the lower end of the second U-shaped seat 360 is rotatably connected to the support arm 320.

[0042] Specifically, in the present embodiment, a slide groove 221 is provided on the connecting block 220; the slide groove 221 is arranged to be inclined to the horizontal plane; the suspension frame 300 includes a slider 310, a support arm 320, a hook assembly 330, a first U-shaped seat 340, a cross shaft 350 and a second U-shaped seat 360, wherein the slide groove 221 is slidably installed in the slide groove 221, the slider 310 and the first U-shaped seat 340 are fixedly connected, the lower end of the first U-shaped seat 340 and the first axis 351 of the cross shaft 350 are rotatably connected; the second axis 352 of the cross shaft 350 and the second U-shaped seat 360 are rotatably connected; the lower end of the second U-shaped seat 360 and the support arm 320 are rotatably connected. In this embodiment, since the slide groove 221 is set at an angle, a universal joint can be formed through the first U-shaped seat 340, the cross shaft 350 and the second U-shaped seat 360, so as to keep the support arm 320 in a natural vertical state, thereby avoiding the failure of various components due to stress when the load on the suspension frame 300 is heavy, thereby improving the service life of the suspension frame 300.

[0043] In some embodiments of the utility model, the hook assembly 330 includes a hinge block 331, a second stop block 332, a guide rod 333, a third stop block 334, a return spring 335 and a hook 336; the hinge block 331 is rotatably connected to the support arm 320, and the second stop block 332 is fixedly connected to the hinge block 331; one end of the guide rod 333 is slidably connected to the second stop block 332, and the other end of the guide rod 333 is fixedly connected to the third stop block 334; the third stop block 334 is fixedly connected to the hook 336; the return spring 335 is sleeved on the guide rod 333, one end of the return spring 335 is fixedly connected to the second stop block 332, and the other end of the return spring 335 is fixedly connected to the third stop block 334. In this embodiment, the return spring 335 is a tension spring. In the natural state, the return spring 335 can control the third stopper 334 to be close to the second stopper 332. In the loaded state, the relative length of the hook 336 and the support arm 320 can be adjusted by pulling the hook 336, so as to adapt to the fixation of meat products of various volumes. Through the design of this structure, the elastic fixation method can not only fully expand the meat products, but also avoid the tearing of the meat product tissue caused by the rigid fixation method.

[0044] In some embodiments of the utility model, the hook assembly 330 further includes a limiting rod 337 and a limiting bolt 338; one end of the limiting rod 337 is fixedly connected to the third stopper 334, and the other end of the limiting rod 337 passes through the third stopper 334 and is threadedly connected to the limiting bolt 338. In this embodiment, by providing the limiting rod 337, the maximum extension distance of the second stopper 332 and the third stopper 334 can be limited, and the guide rod 333 can be prevented from coming out of the second stopper 332. Through the design of this structure, the structural strength of the hook assembly 330 is improved.

[0045] In some embodiments of the utility model, the chain conveyor mechanism 200 includes a driving motor 230, a first sprocket 240, a second sprocket 250 and a tensioning wheel 260; the first sprocket 240 and the second sprocket 250 are respectively arranged at two ends of the refrigerator 100, and the conveying chain 210 is wound around the first sprocket 240 and the second sprocket 250; the driving motor 230 and the first sprocket 240 are transmission connected; the tensioning wheel 260 abuts against the conveying chain 210.

[0046] Specifically, in the present embodiment, the chain conveyor mechanism 200 comprises a driving motor 230, a first sprocket 240, a second sprocket 250, a conveyor chain 210, a connecting block 220 and a tensioning wheel 260, wherein the connecting block 220 and the conveyor chain 210 are fixedly connected, the first sprocket 240 is a driving wheel, the second sprocket 250 is a driven wheel, the driving motor 230 controls the rotation of the first sprocket 240, and when the first sprocket 240 rotates, the second sprocket 250 can be controlled to rotate through the conveyor chain 210, thereby controlling the connecting block 220 to circulate on the conveyor chain 210. In the present embodiment, the connecting block 220 and the hanging member located at the lower part of the conveyor chain 210 are detachably connected, and the meat product can be fixed and conveyed through the hanging frame 300. In order to prevent the conveyor chain 210 from being subjected to force during operation and reducing the transmission efficiency, the conveyor chain 210 is usually provided with a margin. In this embodiment, by providing the tension wheel 260, when the load of the chain conveyor mechanism 200 changes, the conveyor chain 210 can be kept in a taut state, thereby improving the transmission efficiency and service life of the conveyor chain 210.

[0047] In some embodiments of the utility model, the guide mechanism 400 includes a guide base 420 and a connecting rod 430, one end of the guide base 420 is fixedly connected to the chain conveying mechanism 200, the other end of the guide base 420 is threadedly connected to one end of the connecting rod 430, and the other end of the connecting rod 430 is rotatably connected to the guide plate 410. In this embodiment, a slider 310 is provided at the upper end of the suspension frame 300, and the slider 310 is detachably connected to the connecting block 220 of the chain conveying mechanism 200. The lower end of the slider 310 is rotatably connected to the support arm 320. In this embodiment, the slider 310 and the support arm 320 are in an interference fit manner, so the support arm 320 is not easy to rotate naturally during movement. When the hanging part enters the refrigerator 100, the spray mechanism 500 first sprays the left and right sides of the meat product; after spraying the left and right sides of the meat product, the support arm 320 gradually abuts against the guide plate 410 and starts to rotate. During the rotation process, the spray mechanism 500 can spray the front and back sides of the meat product. In this embodiment, the guide plate 410 is rotatably and adjustable mounted on the connecting rod 430. Through the design of this structure, the spatial position of the guide plate 410 can be adjusted, thereby controlling the rotation angle of the support arm 320.

[0048] In some embodiments of the utility model, the spray pipe 510 is provided with an arc portion 511 and a vertical portion 512; and a plurality of spray heads 520 are provided on the spray pipe 510. In this embodiment, the spray mechanism 500 is provided with spray pipes 510 on both sides of the conveyor chain 210, respectively. The spray pipes 510 on both sides of the conveyor chain 210 are respectively provided with arc portions 511 and vertical portions 512 in sequence downward along the vertical direction. The spray pipes 510 on both sides of the conveyor chain 210 form an arch shape. Through the design of this structure, sufficient spraying can be achieved.

[0049] In some embodiments of the present invention, a thermal insulation board is provided on the inner wall of the refrigerator 100. In this embodiment, the thermal insulation board adopts the vacuum insulation principle, and the thermal insulation board is a two-layer structure. By extracting the air inside the thermal insulation board, a vacuum state is formed, which greatly reduces the efficiency of heat conduction and heat convection.

[0050] In some embodiments of the present invention, an air compressor 110 is provided on the refrigerator 100; a slot plate 120 is provided in the refrigerator 100. In this embodiment, the air compressor 110 can be provided to control the temperature in the refrigerator 100, and the slot plate 120 can be provided to prevent the micro-refrigeration liquid from accumulating on the floor of the refrigerator 100.

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A low-temperature quick-freezing device based on micro-freezing liquid quick-freezing technology, characterized in that: include: Freezer (100); A chain conveying mechanism (200), wherein the chain conveying mechanism (200) is provided with a conveying chain (210) on the refrigerator (100), and a plurality of connecting blocks (220) are linearly arranged in a length direction of the conveying chain (210); A suspension frame (300), wherein a slider (310) is disposed at the upper end of the suspension frame (300), and the slider (310) and the connection block (220) are detachably connected; a support arm (320) is rotatably disposed at the lower end of the slider (310), and hook components (330) are respectively disposed at both ends of the support arm (320); A guide mechanism (400), wherein the guide mechanism (400) is provided with a guide plate (410), wherein the guide plate (410) is arranged on a moving path of the suspension frame (300), and when the support arm (320) moves, it can abut against the guide plate (410) and rotate through a reaction force; A spray mechanism (500), wherein the spray mechanism (500) is provided with spray pipes (510) on both sides of the conveying chain (210).

2. The low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology according to claim 1, characterized in that: The connecting block (220) is provided with a slide groove (221); the slide groove (221) is inclined to a horizontal plane, and the vertical height of the open end (222) of the slide groove (221) is higher than the closed end (223) of the slide groove (221); the closed end (223) of the slide groove (221) is provided with a first stopper (224).

3. The low temperature quick freezing device based on the micro-freezing liquid quick freezing technology according to claim 2, characterized in that: The suspension frame (300) includes a first U-shaped seat (340), a cross shaft (350) and a second U-shaped seat (360); the upper end of the first U-shaped seat (340) is fixedly connected to the slider (310), and the lower end of the first U-shaped seat (340) is rotatably connected to the first axis (351) of the cross shaft (350); the second axis (352) of the cross shaft (350) is rotatably connected to the second U-shaped seat (360); and the lower end of the second U-shaped seat (360) is rotatably connected to the support arm (320).

4. The low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology according to claim 1, characterized in that: The hook assembly (330) comprises a hinge block (331), a second block (332), a guide rod (333), a third block (334), a return spring (335) and a hook (336); the hinge block (331) is rotatably connected to the support arm (320), and the second block (332) is fixedly connected to the hinge block (331); one end of the guide rod (333) is slidably connected to the second block (332), and the other end of the guide rod (333) is fixedly connected to the third block (334); the third block (334) is fixedly connected to the hook (336); the return spring (335) is sleeved on the guide rod (333), one end of the return spring (335) is fixedly connected to the second block (332), and the other end of the return spring (335) is fixedly connected to the third block (334).

5. The low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology according to claim 4, characterized in that: The hook assembly (330) further comprises a limiting rod (337) and a limiting bolt (338); one end of the limiting rod (337) is fixedly connected to the third stopper (334), and the other end of the limiting rod (337) passes through the third stopper (334) and is threadedly connected to the limiting bolt (338).

6. The low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology according to claim 1, characterized in that: The chain conveying mechanism (200) comprises a driving motor (230), a first sprocket (240), a second sprocket (250) and a tensioning wheel (260); the first sprocket (240) and the second sprocket (250) are respectively arranged at two ends of the refrigerator (100), and the conveying chain (210) is wound around the first sprocket (240) and the second sprocket (250); the driving motor (230) and the first sprocket (240) are transmission-connected; and the tensioning wheel (260) abuts against the conveying chain (210).

7. The low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology according to claim 1, characterized in that: The guide mechanism (400) comprises a guide base (420) and a connecting rod (430); one end of the guide base (420) is fixedly connected to the chain conveying mechanism (200); the other end of the guide base (420) is threadedly connected to one end of the connecting rod (430); and the other end of the connecting rod (430) is rotatably and adjustably connected to the guide plate (410).

8. The low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology according to claim 1, characterized in that: The spray pipe (510) is provided with an arc-shaped portion (511) and a vertical portion (512); and a plurality of spray heads (520) are provided on the spray pipe (510).

9. The low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology according to claim 1, characterized in that: A temperature insulation board is provided on the inner wall of the refrigerator (100).

10. The low-temperature quick-freezing device based on the micro-freezing liquid quick-freezing technology according to claim 9, characterized in that: An air compressor (110) is provided on the refrigerator (100); and a slot plate (120) is provided inside the refrigerator (100).

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