Tunnel type mixed quick-freezing equipment for ship and working method of tunnel type mixed quick-freezing equipment

Abstract

The invention discloses marine tunnel-type mixed quick-freezing equipment and a working method thereof.The marine tunnel-type mixed quick-freezing equipment comprises a quick-freezing bin, a conveying part and a refrigerating part, the conveying part comprises an upper conveying belt, a lower conveying belt and a turning plate assembly, the upper conveying belt penetrates through an inlet and conveys from outside to inside, the lower conveying belt penetrates through an outlet and conveys from inside to outside, and the turning plate assembly is arranged on the lower conveying belt; the plate turning assembly is arranged between the tail end of the upper conveying belt and the head end of the lower conveying belt in a bearing mode. Catches are suitable for being placed on the upper conveying belt and conveyed into the quick-freezing bin, the catches fall into the turning plate assembly from the upper conveying belt to be turned over, and the turned catches are suitable for entering the lower conveying belt and conveyed out of the quick-freezing bin. Through the special structure and layout design of the conveying component, the refrigerating component, the quick-freezing bin and the refrigerating bin, the quick-freezing component, the refrigerating component, the quick-freezing bin and the refrigerating bin are reasonably distributed in the limited space of the fishing boat, the quick-freezing quality of catches is effectively guaranteed, and meanwhile the characteristics of energy conservation and easy operation are considered.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a marine tunnel-type mixed quick-freezing equipment and a working method thereof. Background Art

[0002] When fishing vessels are engaged in offshore fishing, they obtain their catch through fishing grounds, fishing gear, and fishing methods. To ensure the freshness of the catch, it is usually necessary to refrigerate or freeze the catch. Generally speaking, refrigeration is only sufficient for the portion of the catch that can be brought ashore for timely processing and use. Most of the catch, due to the need for storage or long-distance transportation, is more often preserved by freezing. There are generally two methods for freezing and preserving catches at sea: conventional freezing and quick freezing + refrigeration. Because the temperature inside the fish body cools slowly and fluctuates greatly during conventional freezing, the ice crystals formed are also larger. During the formation process, the continuous action of ice crystals piercing the cell walls of the fish body destroys the cell structure and causes the loss of cell juice, resulting in a poor taste of the fish meat and a significant loss of its delicious flavor.

[0003] Due to the limited space on fishing vessels, how to reasonably utilize the space to design quick-freezing warehouses and cold storage warehouses and ensure the quality of the frozen catch is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this application is to provide a marine tunnel-type mixed quick-freezing device with good quick-freezing effect and reasonable structure and a working method thereof.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a marine tunnel-type mixed quick-freezing equipment, comprising: a quick-freezing bin, the quick-freezing bin being provided with an inlet and an outlet, the inlet being higher than the outlet; a conveying component, the conveying component comprising an upper conveyor belt, a lower conveyor belt and a flap assembly, the upper conveyor belt passing through the inlet and conveying from the outside to the inside, the lower conveyor belt passing through the outlet and conveying from the inside to the outside, the flap assembly being arranged between the tail end of the upper conveyor belt and the head end of the lower conveyor belt; the catch is suitable for being placed on the upper conveyor belt and conveyed into the quick-freezing bin, and the catch is suitable for falling from the upper conveyor belt into the flap assembly for flipping over, and the flipped catch is suitable for entering the lower conveyor belt and conveying out of the quick-freezing bin; a refrigeration component, the refrigeration component being arranged in the quick-freezing bin and suitable for quick-freezing the catch on the conveying component.

[0006] As a preference, the upper conveyor belt and the lower conveyor belt are arranged in a staggered manner, and the projections of the upper conveyor belt and the lower conveyor belt on the horizontal plane do not completely overlap; the refrigeration component is arranged above the upper conveyor belt, and the refrigeration component is suitable for transporting the cold source from top to bottom.

[0007] As a preference, the upper conveyor belt and the lower conveyor belt are both linear, the angle between the upper conveyor belt and the lower conveyor belt is α, 0°<α<90°; the inlet and the outlet are distributed on the left and right.

[0008] As a preference, the flap assembly includes a flap, which supports the tail end of the upper conveyor belt and the head end of the lower conveyor belt. The flap is tilted from top to bottom and from back to front, and the inclination angle of the flap is β, 45°≤β≤65°.

[0009] As a preferred embodiment, the flap is a concave arc-shaped structure with an arc range of 80-110 degrees; a mounting frame for mounting the conveying component is provided in the quick-freezing chamber, and the flap is fixedly mounted on the mounting frame corresponding to the junction of the upper conveyor belt and the lower conveyor belt; the flap assembly further includes side panels, which converge toward the inner side of the arc-shaped structure to form a funnel-shaped configuration; As a preferred embodiment, the refrigeration component includes a liquid nitrogen spray assembly and an evaporator and fan assembly, and the liquid nitrogen spray assembly and the evaporator and fan assembly are both arranged above the conveying component, the liquid nitrogen spray assembly is suitable for spraying liquid nitrogen from top to bottom, and the evaporator and fan assembly is suitable for blowing air from top to bottom; and the liquid nitrogen spray assembly extends in the left and right directions and exceeds the left and right side boundaries of the upper conveyor belt, and the evaporator and fan assembly both extend in the left and right directions and exceed the left and right side boundaries of the conveying component; the evaporator and fan assembly includes a first fan group and a second fan group arranged in the front-to-back direction, the liquid nitrogen spray assembly is arranged between the first evaporator and fan group and the second evaporator and fan group, and a pre-cooling area is formed between the first evaporator and fan group and the upper conveyor belt. A quick-freezing zone is formed between the liquid nitrogen spray assembly and the upper conveyor belt, and a continued-freezing zone is formed between the second evaporator and fan group and the upper conveyor belt; the liquid nitrogen spray assembly includes a liquid nitrogen tank, a liquid separator assembly, a plurality of valves for controlling opening and closing, a liquid nitrogen pipeline for transportation, and a nozzle arranged at the end of the liquid nitrogen pipeline; the liquid separator assembly is provided with a plurality of dispersion parts, each of the dispersion parts is provided with a plurality of dispersion points, the liquid separator assembly and the dispersion parts, and the dispersion parts and the dispersion points are connected through the liquid nitrogen pipeline, the length of all the liquid nitrogen pipelines between the liquid separator assembly and the dispersion parts is the same, and the length of all the liquid nitrogen pipelines between the dispersion parts and the dispersion points is the same; all the dispersion points are evenly distributed in the liquid nitrogen spray area.

[0010] As a preference, the quick-freezing equipment further comprises: an identification component, which is arranged at the inlet and is suitable for obtaining information about the catch, the conveying component is suitable for adjusting the conveying speed according to the catch information, and the refrigeration component is suitable for adjusting the refrigeration time, refrigeration power and / or refrigeration interval according to the catch information; the identification component comprises an infrared sensor and / or a weight sensor to identify the thickness and / or weight information of the catch; a film-forming component, which is arranged at the head end of the upper conveyor belt; the film-forming component comprises a water-passing component and a drainage component, the water-passing component is suitable for immersing the catch and making the catch wet, and the drainage component is suitable for draining the catch after passing through water and forming a water film on the surface of the catch.

[0011] As a preference, the quick-freezing warehouse is arranged above the ship's refrigerated warehouse, and the refrigerated warehouse is provided with a fish catch entrance at the tail end of the lower conveyor belt.

[0012] On the other hand, a working method of a marine tunnel-type mixed quick-freezing device is provided, wherein the quick-freezing device includes a quick-freezing chamber, an upper conveyor belt, a lower conveyor belt, a flap assembly, a refrigeration component, a water flow assembly, and a drain assembly. The working method includes the following steps: Step 1: passing the fish through the water-passing component; Step 2: draining the fish after washing through the draining component and forming a water film on the surface of the fish; Step 3: placing the drained fish onto the upper conveyor belt and conveying it to the quick-freezing chamber, while simultaneously activating the refrigeration component to quickly freeze the fish; Step 4: The catch is turned over after passing through the flap assembly and enters the lower conveyor belt, which transports the catch out of the quick-freezing chamber. At the same time, the refrigeration component compensates and freezes the turned-over catch.

[0013] As a preferred embodiment, the refrigeration component includes a first evaporator and fan group, a liquid nitrogen spray assembly and a second evaporator and fan group arranged in sequence from front to back. The above step three specifically includes the following process: the catch is pre-cooled by passing through the first evaporator and fan group, the catch is quick-frozen by passing through the liquid nitrogen spray assembly, and the catch is continued to be frozen by passing through the second evaporator and fan group; the quick-freezing equipment also includes an identification component, and the above working method also includes the following steps: the identification component identifies the catch information, the upper conveyor belt and the lower conveyor belt adjust the conveying speed according to the catch information, and the refrigeration component is suitable for adjusting the refrigeration time, refrigeration power and refrigeration interval according to the catch information.

[0014] Compared with the prior art, the present invention has the following advantages: By setting up the upper conveyor belt, the lower conveyor belt and the flap assembly, the upper conveyor belt and the lower conveyor belt form a reciprocating conveying, which can realize that the tunnel-type cold storage warehouse has a longer conveying distance, and can also extend the retention time to a certain extent. At the same time, the residence time of the catch at different positions in the quick-freezing warehouse can be controlled according to the control of the conveying speed of the upper conveyor belt and the lower conveyor belt, so that the catch of different specifications can be quickly frozen accordingly, which can further ensure the quick-freezing quality of the catch and at the same time control the energy consumption of each component. On the other hand, the catch is turned over by the flap assembly at the connection between the upper conveyor belt and the lower conveyor belt. After turning over, the other side of the catch is compensated and frozen, which can ensure the uniformity of the overall freezing of the catch and prevent the catch from freezing to a greater extent after the upper surface of the catch at the upper conveyor belt directly contacts the cold source, while the bottom surface of the catch does not directly contact the cold source and freezes to a lesser extent, thereby causing the catch to freeze unevenly and affecting the quality.

[0015] The refrigeration compartment is set below the quick-freezing compartment, and the horizontal projections of the two partially or completely overlap. This setting makes the bottom of the quick-freezing compartment itself have a lower temperature, so that the heat of the quick-freezing compartment itself is not easily dissipated, which helps to save energy.

[0016] The staggered arrangement of the conveying elements allows operators to transfer the frozen catch to the outlet without being affected by the upper feed. Stacking the conveying elements in an upper and lower arrangement saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of an embodiment of the present application.

[0018] Figure 2 yes Figure 1 Front view of the local structure.

[0019] Figure 3 yes Figure 1 Schematic diagram of the internal structure.

[0020] Figure 4 is a schematic diagram of an embodiment of a conveying component.

[0021] Figure 5 yes Figure 4 Schematic diagram of the middle structure after the fixing bracket is installed.

[0022] Figure 6 yes Figure 5 Schematic diagram from another angle.

[0023] Figure 7 It is a schematic diagram of the falling of the catch when the flap is in the appropriate tilt angle range.

[0024] Figure 8It is a schematic diagram of the falling catch when the flap is tilted at a large angle.

[0025] Figure 9 It is a schematic diagram of the falling catch when the flap is tilted at a small angle.

[0026] Figure 10 It is a schematic diagram of the orthogonal decomposition of the supporting force when the catch and the flip board are in contact when the flip board is tilted at a large angle.

[0027] Figure 11 It is a schematic diagram of the orthogonal decomposition of the supporting force when the catch contacts the flip board when the flip board is tilted at an appropriate angle.

[0028] Figure 12 This is a schematic diagram of the changes when the catch comes into contact with the flip board when the flip board is tilted at a small angle.

[0029] Figure 13 It is a schematic diagram of the partitions of various locations in the cold storage warehouse.

[0030] Figure 14 It is a three-dimensional schematic diagram of liquid nitrogen separation in the refrigeration system.

[0031] Figure 15 It is a top view schematic diagram of liquid nitrogen separation in the refrigeration system.

[0032] Figure 16 This is a schematic diagram of the liquid nitrogen spray system installed in the quick freezing chamber.

[0033] Figure 17 It is a schematic diagram of the liquid nitrogen spray system.

[0034] Figure 18 This is a design diagram of a local space on the deck.

[0035] Figure 19 This is a schematic diagram of a local space inside the cabin.

[0036] Figure 20 is a schematic diagram of the liquid nitrogen spray assembly.

[0037] In the figure: 1. Quick-freezing chamber; 2. Deck; 3. Refrigerated chamber; 4. Inlet; 5. Outlet; 6. Identification component; 7. Catch inlet; 8. Drain assembly; 91. First evaporator and fan assembly; 92. Second evaporator and fan assembly; 10. Conveying component; 101. Upper conveyor belt; 102. Lower conveyor belt; 11. Flip plate; 12. Outer box; 13. Liquid separation assembly; 14. Dispersion unit; 15. Liquid nitrogen pipeline; 151. First liquid nitrogen pipeline; 152. Second liquid nitrogen pipeline; 16. Sprinkler head; 17. Protective plate; 18. Packaging and conveying mechanism; 19. Water-passing station; 20. Mounting frame; 21. Side panel; 22. Liquid nitrogen tank; 23. Valve box. DETAILED DESCRIPTION

[0038] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0039] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating the orientation and position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0040] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0041] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0042] Reference Figures 1 to 19 As shown, the present application proposes a marine tunnel-type hybrid quick-freezing device, which mainly includes a quick-freezing chamber 1, a conveying component 10 and a refrigeration component. The catch is sent into and out of the quick-freezing chamber 1 by the conveying component 10, and the refrigeration component is used for refrigeration during the process. For the convenience of description, as shown in FIG. Figure 1 The front, back, left, right, up and down directions are marked in the figure, and the relevant direction descriptions in this application can refer to Figure 1 The directions in the other drawings also refer to this mark.

[0043] As an optional embodiment, the quick freezing equipment uses the fishing boat as a fishing boat, referring to Figure 1 and Figure 18 As shown, multiple anti-slip fishing spots are set on the deck 2. Figure 1Protective panels 17 are installed in front of the deck and on both sides of the quick-freezing chamber 1. The quick-freezing chamber 1 is located on the deck 2 near the anti-slip fishing spot. The fish is then transferred to the quick-freezing equipment for quick freezing. In this embodiment, the quick-freezing equipment uses liquid nitrogen for rapid freezing. The total spraying time is preferably 5-20 minutes, with a single spraying time of 0.5 seconds to 4 seconds and a spraying interval of 20 seconds to 75 seconds.

[0044] The specific steps of quick freezing are as follows: The catch is first treated with water at the water-passing station 19 at the entrance of the quick-freezing chamber 1. The water temperature is generally 2-5°C. The freezing points of marine fish vary depending on their types, so the water temperature can be expanded to a range of -2°C to 5°C. The freezing point of seawater may reach -2°C or even lower due to its different salt concentrations. Each time a fishing boat goes out to sea, it usually has a target fish school in the fishing spot it chooses. The corresponding water temperature can be selected according to the thickness or weight of the target catch. Generally, the water temperature is set with reference to the larger target catch.

[0045] Afterwards, the fish that have been washed with water will be transferred to the draining component for drainage treatment. The standard of drainage is to make the surface of the fish no longer drip, and at this time there is still a layer of water film on the surface of the fish.

[0046] The catch is then transported to the conveyor unit 10 of the quick-freezing chamber 1 via the drain assembly. The conveyor unit 10 transfers the catch from outside the quick-freezing chamber 1 to inside the quick-freezing chamber 1 for quick freezing. After quick freezing, the catch is transported out of the quick-freezing chamber 1 by the conveyor unit 10 and packaged or stored in the cold storage chamber 3 for storage. During the quick-freezing process, the quick-freezing chamber 1 is divided into four areas: a pre-cooling zone, a quick-freezing zone, a continuing freezing zone, and a compensating freezing zone. The refrigeration unit is located within the quick-freezing zone. The conveyor unit 10 includes two conveyor belts, an upper conveyor belt 101 and a lower conveyor belt 102. The two conveyor belts are connected end to end, and a flap assembly is provided at the connection to flip the catch over. When the upper conveyor belt 101 transports the catch, it spends the entire process from entering the quick-freezing chamber 1 to moving beneath the refrigeration unit in the pre-cooling zone. This zone is higher in temperature than the quick-freezing zone, and the dwell time there is shorter, allowing the catch to quickly cool to between 0 and -1°C. Because the overall temperature within the quick-freezing chamber 1 is relatively low, special care must be taken to minimize dwell time in the pre-cooling zone to prevent the catch from freezing too slowly and affecting its quality. The conveying speed of the conveyor unit 10 is adjustable, so adjusting the dwell time of the catch in each zone is equivalent to controlling the actual conveying speed of the conveyor unit 10. The dwell time in the quick-freezing zone is relatively important. The overall dwell time of the catch in the quick-freezing zone is controlled by the conveyor unit 10, while the specific parameters for the single spray time and spray interval are controlled by the refrigeration unit. This process requires identifying the size of the catch and setting corresponding parameters based on the identified size data to ensure quick-freezing quality. The size of the catch can be evaluated based on readily measurable dimensions such as thickness or weight.

[0047] After the quick-freezing zone is completed, the center temperature of the catch is rapidly reduced to below -18°C. This value can be adjusted to a lower level as needed, for example, -20°C. At this time, the catch is continued to be transported to the continued freezing area of ​​the upper conveyor belt 101 for quick freezing, and enters the lower conveyor belt 102 after being turned over by the flip-up assembly. The entire area of ​​the lower conveyor belt 102 is a compensation freezing area, and the catch is in this area throughout the entire process after turning over. Since the first side of the catch is in direct contact with liquid nitrogen during the quick-freezing process, the freezing speed of the first side will be slightly lower than that of the back, resulting in a difference in the overall freezing degree of the catch. At this time, after the catch is turned over, the back of the catch faces upward. When the subsequent catch is quick-frozen by spraying, part of the liquid nitrogen passes through the upper conveyor belt 101 to the lower conveyor belt 102. At this time, the back of the catch is relatively exposed to a lower temperature, which serves as compensation freezing, so that the freezing of the first side and the back of the catch is relatively uniform.

[0048] Finally, the catch is sent out of the quick-freezing chamber 1 through the lower conveyor belt 102, completing the entire quick-freezing process. Figure 1 The packaging conveying mechanism 18 shown transfers the packaged quick-frozen fish.

[0049] A specific implementation scheme of the quick-freezing chamber 1 and the refrigerating chamber 3 is proposed below.

[0050] Reference Figure 2 The quick freezing warehouse 1 is provided with an inlet 4 and an outlet 5, and the inlet 4 is higher than the outlet 5; the quick freezing warehouse 1 is preferably arranged above the marine refrigeration warehouse 3. Such an arrangement makes the quick freezing warehouse 1 and the refrigeration warehouse 3 compactly arranged, wherein the projections of the quick freezing warehouse 1 and the refrigeration warehouse 3 in the horizontal direction are as follows Figure 19 Partial overlap is shown. Of course, the quick-freezing chamber 1 and one of the refrigeration chambers 3 can also be arranged to completely overlap, and corresponding adjustments can be made according to the actual cabin settings of the fishing vessel.

[0051] The cold storage chamber 3 is provided with a catch entrance 7 at the tail end of the lower conveyor belt 102. The catch entrance 7 is a transfer channel between the quick freezing chamber 1 and the cold storage chamber 3. Continue to refer to Figure 19 As shown, the outer walls of the quick-freezing chamber 1 and the cold storage chamber 3 are both provided with insulation materials to ensure heat insulation. The quick-freezing chamber 1 has an inlet 4 for the fish to enter, and an outlet 5 for the quick-frozen fish to be sent out. The high inlet and low outlet setting makes full use of the space in the quick-freezing chamber 1.

[0052] A specific embodiment of the conveying member 10 is presented below.

[0053] Reference Figure 4 and Figure 6 The conveying component 10 mainly includes an upper conveyor belt 101, a lower conveyor belt 102 and a flap assembly. The upper conveyor belt 101 passes through the inlet 4 of the quick-freezing chamber 1 and conveys the catch from the outside to the inside, while the lower conveyor belt 102 passes through the outlet 5 and conveys the catch from the inside to the outside. The flap assembly is arranged between the tail end of the upper conveyor belt 101 and the head end of the lower conveyor belt 102. The catch is suitable for being placed on the upper conveyor belt 101 and conveyed into the quick-freezing chamber 1, and the catch is suitable for falling from the upper conveyor belt 101 into the flap assembly for flipping over. After flipping over, the catch is suitable for entering the lower conveyor belt 102 and conveyed out of the quick-freezing chamber 1. When the catch enters the upper conveyor belt 101, the first side faces upward for quick freezing. When it is transferred to the lower conveyor belt 102 through the flap assembly, the back side of the catch faces upward for compensation freezing. The two freezing processes are coordinated to ensure a uniform freezing effect of the catch.

[0054] By configuring the upper conveyor belt 101, the lower conveyor belt 102, and the flap assembly, the upper conveyor belt 101 and the lower conveyor belt 102 form a reciprocating transport, which can achieve a longer transport distance in the tunnel-type quick-freezing chamber, thereby extending the residence time to a certain extent. At the same time, the residence time of the catch at different positions in the quick-freezing chamber can be controlled according to the control of the conveying speed of the upper conveyor belt 101 and the lower conveyor belt 102, thereby facilitating the quick freezing of catches of different specifications, thereby further ensuring the quick-freezing quality of the catch, and at the same time controlling the energy consumption of each component. On the other hand, the catch is turned over by the flap assembly at the connection between the upper conveyor belt 101 and the lower conveyor belt 102, and the other side of the catch is compensated for freezing after turning over, which can ensure the uniformity of the overall freezing of the catch, and prevent the catch from freezing to a greater extent after the upper surface of the upper conveyor belt 101 directly contacts the cold source, while the back of the catch does not directly contact the cold source and freezes to a lesser extent, thereby causing the catch to freeze unevenly and affect its quality.

[0055] The space in the cabin and on the deck 2 is limited. In order to ensure the quick-freezing effect, the upper conveyor belt 101 and the lower conveyor belt 102 are staggered. The projections of the upper conveyor belt 101 and the lower conveyor belt 102 on the horizontal plane do not completely overlap. As a preferred arrangement scheme of the upper conveyor belt 101 and the lower conveyor belt 102, the upper conveyor belt 101 and the lower conveyor belt 102 are both linear. The angle between the upper conveyor belt 101 and the lower conveyor belt 102 is α, 0°<α<90°; the inlet 4 and the outlet 5 are distributed on the left and right. The refrigeration component is arranged above the upper conveyor belt 101, and the refrigeration component is suitable for transporting the cold source from top to bottom. On the one hand, the staggered upper conveyor belt 101 and the lower conveyor belt 102 can be as shown Figure 4 、 Figure 5 As shown, the two are staggered and the inlet 4 and the outlet 5 can be separated to form a left-right distribution, so that the feeding and discharging of the two do not interfere with each other.

[0056] In addition, the staggered arrangement of the upper conveyor belt 101 and the lower conveyor belt 102 can also lengthen the conveying distance in the relatively limited space of the quick-freezing chamber 1. The relatively long conveying distance can provide sufficient adjustment space and time for the quick-freezing process. The upper conveyor belt 101 and the lower conveyor belt 102 can be controlled separately. For example, after the upper conveyor belt 101 is quick-frozen, the lower conveyor belt 102 can discharge the material relatively more slowly. This can increase the residence time of the catch in the quick-freezing chamber 1, thereby ensuring the final quick-frozen quality of the catch.

[0057] As can be seen, the point where the upper conveyor belt 101 meets the outer side of the quick-freezing bin 1 is the entrance, and the point where the lower conveyor belt 102 meets the outer side of the quick-freezing bin 1 is the exit 5. In practice, as long as the upper conveyor belt 101 and the lower conveyor belt 102 have an angle, regardless of its size, when they are connected end to end, the entrance 4 and exit 5 formed at their other ends on the same side of the quick-freezing bin 1 can always form a perfectly staggered left-right distribution. However, a very small or large angle increases the space required. Therefore, a further preferred angle range can be given: 30° ≤ α ≤ 60°, with 30° being the most preferred.

[0058] In some embodiments, the upper conveyor belt 101 and the lower conveyor belt 102 can also be arranged in parallel and staggered, that is, the setting postures of the upper conveyor belt 101 and the lower conveyor belt 102 are both arranged according to the front and rear directions of the quick-freezing bin 1, but the setting positions along the left and right directions of the quick-freezing bin 1 are different. This can also be described as "staggered arrangement", but the space occupied at this time is obviously larger, and the cross-staggered method is because the end of the upper conveyor belt 101 and the beginning of the lower conveyor belt 102 are connected, so in fact the overall space occupied by the two will be greatly reduced, which is more suitable for the application environment of quick freezing in the cabin used in this application.

[0059] A specific implementation scheme of the flap assembly is proposed below.

[0060] In order to ensure the quick freezing effect, the present application will turn the fish catch over during the transportation process of the conveying component 10. Figure 4 、 Figures 6 to 12 As shown, the flap assembly includes a flap 11, which receives the tail end of the upper conveyor belt 101 and the head end of the lower conveyor belt 102. The flap 11 is tilted from top to bottom and from back to front. The flap 11 formed in this way is as shown in FIG. Figure 4 As shown, the upper layer of fish can be easily transferred to the lower layer. The tilt angle of the flap 11 is β, 45°≤β≤65°. At this tilt angle, the fish will be turned over after falling into the flap 11 and enter the lower conveyor belt 102 after turning over. The flap 11 has a concave arc structure, a curved structure, or an inclined structure, and the curvature range is 80-110°. The quick-freezing chamber 1 is provided with a mounting frame 20 for mounting the conveying component 10. The flap 11 is fixedly mounted on the mounting frame 20 at the junction of the upper conveyor belt 101 and the lower conveyor belt 102. Obviously, the inclined structure is too straight during the turning process of the fish. Although it can be used normally, the transition of the fish when falling is not smooth compared to the arc structure or the curved structure. The curved flap 11 is relatively difficult to produce during production, so the arc structure is preferably used.

[0061] See also Figure 10When the angle β is too large, when the catch falls into the flap 11, the force on the contact point on the flap 11 is N1. This supporting force is perpendicular to the tangent direction of the contact point. At this time, the force N1 can be orthogonally decomposed into F1 and F2. The force in the direction of F1 (considered as the force in the downward direction) will cause the bottom of the catch to slide in this direction, so that the catch can flip from the first side to the second side, thereby turning over. However, it can be seen that the arc surface of the flap 11 is relatively steep at this time, and the horizontal travel of the arc surface of the flap 11 is very short, resulting in a very small overall range of action of the flap 11. When the catch falls too fast or too slow, the landing point or the distance or nearness can easily exceed the effective area of ​​the flap 11. At this time, even if the catch can theoretically be turned over after falling into the flap 11, it is not actually adopted due to design issues.

[0062] See also Figure 11 When the angle β is relatively appropriate, when the catch falls into the flap 11, the force on the contact point on the flap 11 is N2. At this time, the force N2 can be orthogonally decomposed into F3 and F4. The force in the direction of F3 will cause the bottom of the catch to slide in this direction, but combined with Figure 10 It can be seen that at this time, the force in the F3 direction (corresponding to F1, the force in the downward direction) has been greatly reduced, but the force in the F4 direction (corresponding to F2) has increased. However, at this time, the force F3 is still sufficient to slide the catch toward the downward arc surface of the flip, thereby completing the flip. At this time, due to the appropriate angle, the horizontal stroke of the flip plate 11 is also sufficient for the catch to fall in, so it is a more appropriate angle.

[0063] See also Figure 12 When the angle β is further reduced, when the catch falls into the flap 11, the force in the downward direction is further reduced, and it is no longer enough to make the catch slide down. Figure 12 The fish is flipped back as shown, so that the catch cannot be turned over after it falls.

[0064] Based on the above principles, the preferred angle of this application is 45° to 65°. Of course, even if the inclination angle β of the flap 11 is within the appropriate range, a small number of fish may fail to flip over due to factors such as slipping after the surface is frozen. However, the majority of the fish can be flipped over, ensuring the overall freezing effect.

[0065] When the catch is placed on the upper conveyor belt 101 and the lower conveyor belt 102, the catch may also be placed at the corners. Obviously, the width of the flap 11 in the initial state is similar to the width of the upper conveyor belt 101 and the lower conveyor belt 102, that is, slightly smaller, just right or slightly larger. Of course, the preferred solution is just right and slightly larger. In this way, during the turning over of the catch, the catch located at the edge of the upper conveyor belt 101 is easy to fall out of the conveying range of the lower conveyor belt 102 after turning over. The quick-freezing chamber 1 is in a relatively closed state. If the catch falls out, it is more cumbersome to clean it up. Therefore, the flap assembly is preferably further provided with a side panel 21. The side panel 21 is configured to converge toward the inner side of the arc structure to form a funnel-shaped configuration. The funnel-shaped configuration can form a large top receiving area and a small bottom conveying area, so that the catch falling on the edge of the flap 11 moves toward the center, which can ensure that the catch stably reaches the lower conveyor belt 102 after falling.

[0066] A preferred embodiment of the refrigeration component is presented below.

[0067] like Figure 2 、 Figure 5 As shown, the refrigeration component includes a liquid nitrogen spray assembly and an evaporator and fan assembly. The liquid nitrogen spray assembly, the evaporator and the fan assembly are all arranged above the conveying component 10. The liquid nitrogen spray assembly is suitable for spraying liquid nitrogen from top to bottom, and the evaporator and the fan assembly are suitable for blowing air from top to bottom; and the liquid nitrogen spray assembly extends in the left and right directions and exceeds the left and right side boundaries of the upper conveyor belt 101, and the evaporator and the fan assembly extend in the left and right directions and exceed the left and right side boundaries of the conveying component 10; the evaporator and the fan assembly includes a first evaporator and fan group 91 and a second evaporator arranged in the front-to-back direction. and fan group 92, the liquid nitrogen spray assembly is arranged between the first evaporator and fan group 91 and the second evaporator and fan group 92, a pre-cooling zone is formed between the first evaporator and fan group 91 and the upper conveyor belt 101, a quick freezing zone is formed between the liquid nitrogen spray assembly and the upper conveyor belt 101, and a continuing freezing zone is formed between the second evaporator and fan group 92 and the upper conveyor belt 101; through the specific setting position of the liquid nitrogen spray assembly, the position setting of the first evaporator and fan group 91 and the second evaporator and fan group 92, when the catch enters the upper conveyor belt 101, it initially passes through the following Figure 5The area corresponding to the first evaporator and fan group 91 shown is not directly affected by liquid nitrogen and serves as a pre-cooling area to cool the catch; then the catch moves in the upper conveyor belt 101 to the area below the liquid nitrogen spray assembly. This area is directly sprayed with liquid nitrogen, so the catch can be quickly cooled, so that it quickly passes through the ice crystal formation zone, and the center temperature will drop below -18°C to complete the speed. However, due to the different degrees of direct action of liquid nitrogen on the surface and bottom of the catch, it is obvious that the surface temperature of the catch is much lower than the temperature of the bottom of the catch. If the thickness of the catch is large, the freezing of the bottom of the catch is not complete, or it may cause uneven freezing of the upper and lower surfaces of the catch. In order to solve this problem, the present application uses the connection of the flip assembly to turn the catch over before transferring to the lower conveyor belt 102. In this way, when the conveying process continues, the bottom can be better compensated for freezing when transported upward, so that the freezing of the catch is relatively more uniform and thorough.

[0068] Due to cabin space limitations, it's difficult to install multiple liquid nitrogen spray assemblies on different surfaces within the cabin to ensure uniform spraying. Therefore, this application utilizes a top-down spray system, combined with an evaporator and fan assembly to blow air from top to bottom. This accelerates the diffusion of liquid nitrogen throughout the cabin, creating a cold environment within the cabin where the spraying area is the lowest and the surrounding temperature can drop rapidly. The liquid nitrogen spray assemblies extend beyond the left and right boundaries of the upper conveyor belt 101, allowing the liquid nitrogen to fully and completely spray the fish on the upper conveyor belt 101, preventing the sprayed liquid nitrogen from directly affecting the catch.

[0069] Since the evaporator and fan assembly includes the first evaporator and fan group 91 and the second evaporator and fan group 92, the two evaporators and fan groups extend in the left and right directions and exceed the left and right side boundaries of the conveying part 10. In this arrangement, the evaporator and fan assembly can simply spread the cooling energy to the entire conveying part 10 used for conveying in the quick freezing chamber 1. Of course, when the evaporator and fan assembly is arranged above the conveying part 10, it can be considered that the evaporator and fan assembly covers all parts of the conveying part 10 in the quick freezing chamber 1, for example Figure 3 The specific number and Figure 5 Different evaporator and fan specifications and quantities can be set as needed. It is worth mentioning that the evaporator and fan assembly in this application is a second set of refrigeration equipment. For example, if Freon refrigeration is used, the refrigerant is R22 (difluoromonochloromethane). Unlike the pulse spray of the liquid nitrogen spray assembly, the evaporator and fan assembly are in continuous operation, keeping the overall temperature inside the quick freezing chamber 1 at around -30°C to -40°C.

[0070] like Figure 14 、 Figure 15 and Figure 20As shown, the above-mentioned liquid nitrogen spray assembly includes a liquid nitrogen tank 22, a liquid separator assembly 13, a plurality of valves for controlling opening and closing, a liquid nitrogen pipeline 15 for transportation, and a nozzle arranged at the end of the liquid nitrogen pipeline 15; the liquid separator assembly 13 is provided with a plurality of dispersion parts 14, each dispersion part 14 is provided with a plurality of dispersion points, the liquid separator assembly 13 and the dispersion part 14, and the dispersion part 14 and the dispersion points are connected through the liquid nitrogen pipeline 15, the length of all liquid nitrogen pipelines 15 between the liquid separator assembly 13 and the dispersion part 14 is the same, and the length of all liquid nitrogen pipelines 15 between the dispersion part 14 and the dispersion points is the same; all the dispersion points are evenly distributed in the liquid nitrogen spray area. The temperature of liquid nitrogen is about -196°C. When it is directly applied to the catch, if the spray volume is too large, the surface of the catch will cool down too quickly, while the inside of the catch will cool down relatively slowly, which will easily lead to large differences in the freezing speed of the catch, causing pits or irregular shapes to appear on the surface of the catch. Therefore, the spray volume needs to be considered during actual freezing. This application adopts the method of increasing the spray area and reducing the spray speed of liquid nitrogen during spraying to control the spray speed of liquid nitrogen, thereby ensuring the quick freezing effect.

[0071] like Figure 14 、 Figure 15 As shown, a first liquid nitrogen pipeline 151 is set between the dispersion part 14 and the dispersion point. All the first liquid nitrogen pipelines 151 are of the same length. Obviously, the liquid nitrogen pipelines 15 that are closer to the dispersion part 14 and the dispersion point have slightly more bends, and vice versa. A second liquid nitrogen pipeline 152 is set between the dispersion point and the spray head 16. All the second liquid nitrogen pipelines are also of the same length. This arrangement makes the positions of all the spray heads 16 evenly distributed, so that the partial pressure of the liquid nitrogen sprayed from each spray head 16 is similar or the same, and the uniform arrangement of the spray heads 16 can further increase the uniformity. Figure 16 An outer box 12 is provided outside the liquid separation assembly 13, the dispersion part 14 and the dispersion point. The outer box 12 is used to fix and install the above-mentioned liquid separation assembly 13, the dispersion part 14 and the dispersion point.

[0072] like Figure 20As shown, the liquid nitrogen tank 22 is directly connected to a valve box 23 composed of multiple valves via a pipeline. The multiple valves can be solenoid valves (manual valves). Different valve types can also be installed, such as flow control valves to control the total flow rate, and pressure-limiting valves to control the liquid nitrogen at a certain pressure. Each valve in the valve box is then connected to a dispersion section 14. The dispersion section 14 can be directly placed above the conveying component 10 for spraying. Of course, multiple dispersion points can also be set to further subdivide the liquid nitrogen spray. For example, the liquid separation assembly 13 here is provided with five dispersion sections 14, each of which is further divided into five dispersion points, forming a total of 40 dispersion points, thus providing 40 spray heads 16. These spray heads 16 are evenly arranged, and the spray duration and spray interval are the same, so that the passing catch obtains a relatively uniform cooling effect. Therefore, the relevant spray parameters of the liquid nitrogen spray assembly can be automatically adjusted by the solenoid valve. Obviously, the conveying component 10 in this application can also have both automatic and manual control modes.

[0073] The quick freezing equipment may further include the following components: (1) Identification component 6. Identification component 6 is arranged at the inlet 4 and is suitable for obtaining information about the catch. The conveying component 10 is suitable for adjusting the conveying speed according to the catch information. The refrigeration component is suitable for adjusting the refrigeration time, refrigeration power and / or refrigeration interval according to the catch information. The identification component 6 includes an infrared sensor and a weight / or quantity sensor to identify the thickness and / or weight information of the catch. The conveying component 10 and the refrigeration component can be adjusted by electronic control. The corresponding parameters are preset in advance, and specific reflection and operation can be performed according to the catch information identified by the identification component 6.

[0074] The identification component 6 can be set as an infrared laser sensor, and a bracket is set on the deck 2. The mounting position and mounting angle of the infrared laser sensor can be adjusted and installed through the bracket, so that the infrared laser sensor can be obliquely facing the catch. At the same time, the bracket can be equipped with multiple infrared laser sensors at the same time. Multiple infrared laser sensors can identify the same catch at the same time, and the thickness information of the catch can be obtained by comprehensive calculation based on the identification results. This can reduce the error problem during single laser sensor identification.

[0075] Alternatively, the identification component 6 may be configured as a weight sensor, which may be used to identify the weight of the catch as an identification signal and control the corresponding parameters of the conveying component 10 and the refrigeration component.

[0076] (2) Film forming component, which is arranged at the head end of the upper conveyor belt 101; the film forming component includes a water flow component and a drain component 8, the water flow component is suitable for immersing the catch and making the catch wet, and the drain component 8 is suitable for draining the catch after the water flow and forming a water film on the surface of the catch. The drain component 8 is arranged outside the entrance of the quick freezing chamber 1, and the water flow component is arranged at the front end of the drain component. The water flow component can be referred to as Figure 1 As shown, a water-passing station 19 is provided. This station 19 can be equipped with an automatic water-passing device for automatic water-passing, or a water tank can be provided. The tank is filled with seawater and ice cubes are placed in the tank to cool it down, while manual water-passing is performed. A common draining component is a vibrating screen. After the catch is placed in the screen, it is vibrated to a set degree. This not only removes excess water from the surface of the catch, forming a relatively uniform water film on the surface, but also allows for feeding.

[0077] During this process, a water film forms on the surface of the fish, which has a relatively small protective effect. However, after the fish is subsequently transferred to the quick-freezing chamber 1 and immediately enters the pre-cooling zone, the water film quickly condenses into an ice film, which now has a better protective effect. When the ice film condenses, if the fish is only treated with water but not drained, it may enter the quick-freezing chamber 1 in a dripping state. Marine tunnel quick-freezing chambers 1 are usually relatively closed. At this time, when the water droplets fall and form ice crystals in the conveying component 10 or the quick-freezing chamber 1, they may hinder or even damage the equipment. After the ice film forms on the surface of the fish, when the fish is transported to the quick-cooling zone, the fish quickly freezes from the outside in. When liquid nitrogen is sprayed, it acts on the ice film rather than directly on the surface of the fish, thereby preventing the surface temperature of the fish from being too low or the temperature dropping too quickly, forming pits or irregular shapes.

[0078] Of course, in the process of conveying the catches by the conveying part 10, due to the processing time of liquid nitrogen spraying, if it is used in a fishing environment, it may be necessary to wait for the liquid nitrogen spraying of the previous batch of catches to be completed before entering the conveying part 10 for conveying and quick freezing in the next process. The quick freezing equipment also has other uses. For example, in fishing operations, there may be situations where some fish are salvaged in batches. In such working conditions, it is best to simply classify the catches, classify the catches into medium-sized and large-sized ones, and divide them into several batches for batch quick freezing.

[0079] The following is a specific embodiment.

[0080] During fishing operations, if yellow croaker is the primary target and yellow croaker of varying sizes is obtained, the yellow croaker obtained will be classified. Yellow croaker with a thickness of less than 3 cm is relatively small and generally of lower value, and can be simply frozen and stored, or placed in a quick-freezing chamber 1 for simple quick-freezing. Yellow croaker with a moderate thickness, between 3 cm and 6 cm, will be quick-frozen as a single batch; yellow croaker with a thickness of more than 6 cm will be quick-frozen as a single batch. The specific treatment of these two batches of yellow croaker is as follows: (1) The yellow croakers of the same batch with appropriate size were quick-frozen. The thickness of the yellow croakers ranged from 3 cm to 6 cm, with the largest 6 cm as the standard. The yellow croakers were first subjected to water treatment at a water temperature of 1 ° C and a water time of 10 seconds. After water treatment, they were transferred to the draining component for draining, and then transferred to the conveying component 10. The total transportation time of the yellow croakers in the quick-freezing chamber 1 was selected to be 45 minutes, of which the transportation time in the pre-cooling area was 5 minutes, the total transportation time in the quick-freezing area was 8 minutes, the total transportation time in the continued freezing area was 7 minutes, and the total transportation time in the compensation freezing area was 25 minutes. The lengths of the upper and lower conveyor belts 102 in the cabin were both 6 meters. According to the length and transportation time of each area, the average transportation speed of each section can be specifically known. Of course, the upper conveyor belt 101 and the lower conveyor belt 102 can stop at a specific position in each section, so that the transportation speed of the conveyor belts can be flexibly controlled. In the quick-freezing area, the single spraying time of liquid nitrogen is 3 seconds, and the spraying interval is 30 seconds. After quick freezing is completed, the lower conveyor belt 102 sends the catch out of the quick freezing chamber 1 and transfers it to the cold storage chamber 3 through the catch entrance 7 for storage. The temperature of the cold storage chamber 3 is -28°C. Of course, the outer wall of the quick-freezing chamber 1 is insulated. In this application, the total time of liquid nitrogen spraying is the time that the batch of catches spends in the quick-freezing zone (taking into account both the spraying time and the spraying interval). However, during a single seafaring operation, it is generally difficult for all the catches to be processed in the quick-freezing chamber 1 at once after being sorted. The same batch of yellow croaker also needs to be quick-frozen in several waves. Since the total delivery time of the quick-freezing zone is 8 minutes, a wave of yellow croaker from the same batch can be loaded (previously rinsed and drained) every 8 minutes. While the previous wave of yellow croaker enters the quick-freezing zone for quick freezing, the next wave of yellow croaker can be placed at the entrance of the quick-freezing chamber 1 to wait, or can be placed in the conveying member 10 a little in advance. While the previous wave of yellow croaker is quick-frozen, the next wave of yellow croaker is pre-cooled. In this case, the pre-cooling time is correspondingly extended. Generally, the pre-cooling time is set to be less than the quick-freezing spraying time. However, with this arrangement, when the same batch of yellow croaker is quick-frozen in multiple waves, a better consistency of quick-freezing operation can be ensured.

[0081] (2) The larger yellow croakers of the same batch were quick-frozen. The thickness of the yellow croakers was greater than 6 cm, and the largest was 8 cm. The yellow croakers were first water-treated at a temperature of 0°C and a water-treatment time of 12 seconds. After water-treatment, the yellow croakers were transferred to the draining assembly for drainage, and then to the conveying component 10. The total transportation time of the yellow croakers in the quick-freezing chamber 1 was 55 minutes, of which the transportation time in the pre-cooling zone was 8 minutes, the total transportation time in the quick-freezing zone was 10 minutes, the total transportation time in the post-freezing zone was 10 minutes, and the total transportation time in the compensatory freezing zone was 27 minutes. In the quick-freezing zone, the single spraying time of liquid nitrogen was 3.5 seconds, and the spraying interval was 25 seconds. After the quick-freezing was completed, the lower conveyor belt 102 sent the catch out of the quick-freezing chamber 1 and transferred it to the cold storage chamber 3 for storage through the catch entrance 7. The temperature of the cold storage chamber 3 was -28°C.

[0082] Of course, in actual processing, the above thickness can be further subdivided, so that the quick-freezing effect is better and more energy-saving. However, the catch obtained in actual fishing operations varies greatly. Dividing the batches into too many may greatly increase the processing time. Therefore, further consideration should be given based on actual needs.

[0083] On the other hand, the present application provides a working method of a marine tunnel-type hybrid quick-freezing device, the quick-freezing device comprising a quick-freezing chamber 1, an upper conveyor belt 101, a lower conveyor belt 102, a flap assembly, a refrigeration component, a water flow assembly, and a drain assembly 8. The working method comprises the following steps: Step 1: The catch is passed through a water-passing component; the water-passing component can be in the form of a conveyor belt that automatically transmits the catch and then transports it out after passing through a water tank, or it can be in the form of manual water-passing and then put into a subsequent process.

[0084] Step 2: Drain the fish after washing through the drain component and form a water film on the surface of the fish; the drain component can drain by vibration, but the amplitude and frequency of the drainage need to be considered accordingly to prevent freezing pits from forming on the surface of the fish.

[0085] Step 3: Place the drained fish on the upper conveyor belt 101 and transport it to the quick-freezing chamber 1, and at the same time start the refrigeration component to quick-freeze the fish; during the transportation process, the water film on the surface of the fish will immediately freeze and form an ice film, and the refrigeration component will not directly affect the surface of the fish during quick freezing.

[0086] Step 4: The catch is turned over after passing through the flap assembly and enters the lower conveyor belt 102, which transports the catch out of the quick-freezing chamber 1. At the same time, the refrigeration component compensates and freezes the turned catch.

[0087] The refrigeration component includes a first evaporator and fan group 91, a liquid nitrogen spray assembly, and a second evaporator and fan group 92, which are arranged in sequence from front to back. The above steps three and four specifically include the following processes: the catch is pre-cooled by the first evaporator and fan group 91, the catch is quickly frozen by the liquid nitrogen spray assembly, the catch is continued to be frozen by the second evaporator and fan group 92, and the catch is turned over after passing through the flip assembly and enters the lower conveyor belt for compensation freezing; the refrigeration component cooperates with the first evaporator and fan group 91 and the second evaporator and fan group 92 to form a pre-cooling zone a, a quick freezing zone b, a continued freezing zone c and a compensation freezing zone d in the quick-freezing chamber 1 along the conveying direction of the catch, which can be referred to Figure 13 .

[0088] The quick-freezing device further includes an identification component 6. The working method further includes the following steps: the identification component 6 identifies information about the catch, the upper conveyor belt 101 and the lower conveyor belt 102 adjust the conveying speed according to the catch information, and the refrigeration component is adapted to adjust the refrigeration time, refrigeration power, and refrigeration interval according to the catch information. The catch information may be the thickness of the catch or the weight of the catch.

[0089] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A marine tunnel type mixed quick freezing equipment, characterized in that: include: A quick-freezing chamber, wherein the quick-freezing chamber is provided with an inlet and an outlet, wherein the inlet is higher than the outlet; The conveying component includes an upper conveyor belt, a lower conveyor belt and a flip assembly. The upper conveyor belt passes through the inlet and conveys from the outside to the inside, and the lower conveyor belt passes through the outlet and conveys from the inside to the outside. The flip assembly is arranged between the tail end of the upper conveyor belt and the head end of the lower conveyor belt. The catch is suitable for being placed on the upper conveyor belt and conveyed into the quick-freezing bin, and the catch is suitable for falling from the upper conveyor belt into the flip assembly to be turned over. After turning over, the catch is suitable for entering the lower conveyor belt and conveyed out of the quick-freezing bin. A refrigeration component is arranged in the quick-freezing chamber and is suitable for quick-freezing the catch on the conveying component.

2. A marine tunnel type mixed quick freezing equipment according to claim 1, characterized in that: The upper conveyor belt and the lower conveyor belt are arranged in a staggered manner, and the projections of the upper conveyor belt and the lower conveyor belt on the horizontal plane do not completely overlap; the refrigeration component is arranged above the upper conveyor belt, and the refrigeration component is suitable for transporting the cold source from top to bottom.

3. A marine tunnel type mixed quick freezing equipment according to claim 2, characterized in that: The upper conveyor belt and the lower conveyor belt are both linear, and the angle between the upper conveyor belt and the lower conveyor belt is α, 0°<α<90°; the inlet and the outlet are distributed on the left and right.

4. A marine tunnel type mixed quick freezing equipment according to claim 1, characterized in that: The flap assembly includes a flap, which supports the tail end of the upper conveyor belt and the head end of the lower conveyor belt. The flap is tilted from top to bottom and from back to front, and the tilt angle of the flap is β, 45°≤β≤65°.

5. A marine tunnel type mixed quick freezing equipment according to claim 4, characterized in that: The flap is a concave arc structure with an arc range of 80-110 degrees; The flap assembly further includes side panels that converge toward the inner side of the arc-shaped structure to form a funnel-shaped configuration; A mounting frame for mounting the conveying component is provided in the quick-freezing chamber, and the flap is fixedly mounted on the mounting frame at a position corresponding to the junction of the upper conveyor belt and the lower conveyor belt.

6. The marine tunnel type mixed quick freezing equipment according to claim 1, characterized in that: The refrigeration component includes a liquid nitrogen spray assembly and an evaporator and fan assembly, and the liquid nitrogen spray assembly and the evaporator and fan assembly are both arranged above the conveying component. The liquid nitrogen spray assembly is suitable for spraying liquid nitrogen from top to bottom, and the evaporator and fan assembly is suitable for blowing air from top to bottom; the liquid nitrogen spray assembly extends in the left and right directions and exceeds the left and right side boundaries of the upper conveyor belt, and the evaporator and fan assembly both extend in the left and right directions and exceed the left and right side boundaries of the conveying component; The evaporator and fan assembly includes a first fan group and a second fan group arranged in a front-to-back direction, the liquid nitrogen spray assembly is disposed between the first fan group and the second fan group, a pre-cooling zone is formed between the first fan group and the upper conveyor belt, a quick-freezing zone is formed between the liquid nitrogen spray assembly and the upper conveyor belt, and a continuing-freezing zone is formed between the second fan group and the upper conveyor belt; The liquid nitrogen spray assembly includes a liquid nitrogen tank, a liquid separator assembly, multiple valves for controlling opening and closing, a liquid nitrogen pipeline for transportation, and a nozzle arranged at the end of the liquid nitrogen pipeline; the liquid separator assembly is provided with a plurality of dispersion parts, each of the dispersion parts is provided with a plurality of dispersion points, the liquid separator assembly and the dispersion parts, and the dispersion parts and the dispersion points are connected through the liquid nitrogen pipeline, the length of all the liquid nitrogen pipelines between the liquid separator assembly and the dispersion parts is the same, and the length of all the liquid nitrogen pipelines between the dispersion parts and the dispersion points is the same; all the dispersion points are evenly distributed in the liquid nitrogen spray area.

7. The marine tunnel type mixed quick freezing equipment according to claim 1, characterized in that: Also includes: an identification component disposed at the inlet and adapted to acquire information about the catch; the conveying component adapted to adjust a conveying speed according to the catch information; and the refrigeration component adapted to adjust a refrigeration time, refrigeration power, and / or refrigeration interval according to the catch information; the identification component comprising an infrared sensor and / or a weight sensor for identifying the thickness and / or weight of the catch; a film-forming component, the film-forming component being arranged at the head end of the upper conveyor belt; The film-forming component includes a water-passing component and a water-draining component. The water-passing component is suitable for immersing the catch and making the catch wet. The water-draining component is suitable for draining the catch after passing through the water and forming a water film on the surface of the catch.

8. The marine tunnel type mixed quick freezing equipment according to claim 1, characterized in that: The utility model further comprises a refrigerated warehouse, the quick-freezing warehouse is arranged above the refrigerated warehouse, and the refrigerated warehouse is provided with a fish catch entrance at the tail end of the lower conveyor belt.

9. A working method of a marine tunnel type mixed quick freezing equipment, characterized in that: The quick freezing equipment includes a quick freezing chamber, an upper conveyor belt, a lower conveyor belt, a flap assembly, a refrigeration component, a water flow assembly, and a drain assembly. The working method includes the following steps: Step 1: passing the fish through the water-passing component; Step 2: draining the fish after being washed through the draining component and forming a water film on the surface of the fish; Step 3: placing the drained fish onto the upper conveyor belt and conveying it to the quick-freezing chamber, and activating the refrigeration component to quickly freeze the fish; Step 4: The catch is turned over after passing through the flap assembly and enters the lower conveyor belt, which transports the catch out of the quick-freezing chamber. At the same time, the refrigeration component compensates and freezes the turned-over catch.

10. The operating method of the marine tunnel type mixing quick freezing equipment according to claim 9, characterized in that: The refrigeration component includes a first evaporator and fan group, a liquid nitrogen spray assembly, and a second evaporator and fan group, which are arranged in sequence from front to back. The above step three specifically includes the following process: The fish is pre-cooled by the first evaporator and the fan group, quickly frozen by the liquid nitrogen spray assembly, and continued to be frozen by the second evaporator and the fan group; The quick-freezing equipment also includes an identification component, and the above working method also includes the following steps: the identification component identifies the catch information, the upper conveyor belt and the lower conveyor belt adjust the conveying speed according to the catch information, and the refrigeration component is suitable for adjusting the refrigeration time, refrigeration power and refrigeration interval according to the catch information.

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