A food quick-freezing tunnel with optimized tunnel airflow

Abstract

The present invention relates to the technical field of food quick-freezing tunnels, and discloses a tunnel airflow optimized food quick-freezing tunnel, comprising an outer hood; a conveying device, the conveying device being mounted on the outer hood; a plurality of conveying boxes, the plurality of conveying boxes being placed on a conveyor belt of the conveying device; an inner hood, the inner hood being placed inside the outer hood; and a heat-insulating structure, the heat-insulating structure being arranged on the outer hood and the inner hood. The present invention, by designing the first and second rotating plates, can effectively seal cold air in the inner hood during the movement of the conveying box, reducing the leakage of cold air to the outside, thereby saving the energy required for the operation of the condensing equipment and reducing energy consumption. Reducing the amount of cold air leakage means that a more stable low-temperature environment can be maintained inside the inner hood, which helps to improve the quick-freezing efficiency and quality of frozen food.

Description

Technical Field

[0001] The invention relates to the technical field of food quick-freezing tunnels, and in particular to a tunnel airflow optimized type food quick-freezing tunnel. Background Art

[0002] A food quick-freezing tunnel is a device used to quickly freeze food. It is usually used in the food processing industry. It is a continuous freezing equipment that sends food into a tunnel structure and uses forced circulation of frozen air or frozen liquid to quickly lower the temperature of the food, thereby achieving the purpose of rapid freezing.

[0003] After searching, the Chinese patent with the announcement number CN214316903U discloses a quick-freezing tunnel device for food, including a conveyor mesh belt, a conveyor bracket and a support plate, the conveyor mesh belt is movably connected to the conveyor bracket, the support plate is fixedly connected to the conveyor bracket, the rear end of the conveyor bracket on the right side is connected to a power motor, a quick-freezing box is arranged above the support plate, a freezing structure is arranged on the quick-freezing box, a pair of deicing structures are arranged below the support plate, and a pair of collecting structures are arranged inside the conveyor bracket; the utility model relates to the technical field of quick-freezing tunnels for food, the internal structure of the above scheme is simple, the food can be quick-frozen by the provided freezing structure, and the ice on the conveyor mesh belt can be completely removed by the provided pair of deicing structures, and the removed ice can be collected by the provided collecting structure, so that the ice will not be everywhere, and the ground can be prevented from being polluted. However, the above scheme still has the following shortcomings when it is actually used:

[0004] The inlet and outlet of the quick-freezing tunnel are the necessary passages for quick-frozen food to enter and exit the quick-freezing device, and are also the main parts of the quick-freezing tunnel where cold leaks. For continuous quick-freezing tunnels, the inlet and outlet are always open. Due to the large temperature difference between the inside and outside of the quick-freezing tunnel and a certain wind pressure inside the quick-freezing tunnel, cold air will flow out of the tunnel quickly, causing a large amount of cold loss. The loss of cold air will cause the temperature inside the quick-freezing tunnel to be unstable, thereby affecting the quick-freezing effect of quick-frozen food, prolonging the quick-freezing time, and reducing production efficiency. In addition, a large amount of cold loss means that more energy is needed to maintain the low-temperature environment in the quick-freezing tunnel, increasing energy consumption and operating costs.

[0005] Therefore, it is necessary to design a tunnel airflow optimized food quick-freezing tunnel to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a tunnel airflow optimized food quick-freezing tunnel.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A tunnel airflow optimized food quick-freezing tunnel, comprising an outer machine cover;

[0009] A conveying device, wherein the conveying device is mounted on the outer hood;

[0010] A plurality of conveying boxes, wherein the plurality of conveying boxes are placed on a conveying belt of a conveying device;

[0011] An inner hood, the inner hood being disposed inside the outer hood;

[0012] A heat-insulating structure, wherein the heat-insulating structure is arranged on the outer hood and the inner hood;

[0013] The thermal insulation structure comprises:

[0014] Two first openings, the two first openings are respectively opened at two ends of the outer cover;

[0015] Two first rotating plates, the two first rotating plates are rotatably installed in the two first openings respectively;

[0016] Two second openings, the two second openings are respectively opened at two ends of the inner hood;

[0017] Two second rotating plates are rotatably mounted in the two second openings respectively.

[0018] As a preferred technical solution of the present invention, two pushing structures are arranged inside the outer hood, and the two pushing structures are respectively arranged at the feeding end and the discharging end of the conveying device, the pushing structure close to the feeding end is placed between the inner hood and the outer hood, and the pushing structure close to the discharging end is placed inside the inner hood;

[0019] Each of the pushing structures includes a driving component and a pushing component;

[0020] Both ends of the inner hood are provided with trigger components.

[0021] As a preferred technical solution of the present invention, the driving assembly includes:

[0022] Fixed frame;

[0023] A motor, wherein the motor is mounted on a fixed frame;

[0024] A reciprocating screw rod, one end of which is axially connected to the output shaft of the motor, and the other end of which is rotatably mounted on a fixed frame;

[0025] Two guide rods, both of which are fixed on a fixing frame;

[0026] The movable seat is threadedly sleeved on the reciprocating screw rod, and the movable seat is slidably sleeved on the two guide rods.

[0027] As a preferred technical solution of the present invention, the pushing component includes:

[0028] A fixed seat, the fixed seat being fixed on a side of the movable seat;

[0029] A rotating seat, wherein the rotating seat is rotatably mounted on the fixed seat via a shaft;

[0030] A push plate, the push plate being fixed on the rotating seat;

[0031] A torsion spring, one end of which is connected to the fixed seat, and the other end of which is connected to the rotating seat;

[0032] The limiting plate is fixed on the side of the moving seat, and the limiting plate is located on one side of the pushing plate.

[0033] As a preferred technical solution of the present invention, the trigger component includes:

[0034] a bracket, wherein the bracket is fixed to the inner hood;

[0035] A proximity switch is installed on the bracket and is electrically connected to the motor.

[0036] As a preferred technical solution of the present invention, both ends of the inner hood are provided with guide structures, each of the guide structures includes a sliding component and an injection component, and the two sliding components are respectively arranged on two fixing frames.

[0037] As a preferred technical solution of the present invention, the sliding assembly includes:

[0038] A mounting frame, wherein the mounting frame is fixed on the fixing frame, and the mounting frame is in a U-shaped structure;

[0039] A mounting tube, wherein the mounting tube is fixed on the mounting frame;

[0040] A slider, the slider being slidably disposed inside the mounting cylinder;

[0041] A strip-shaped opening, which is opened on the outer peripheral surface of the installation tube and is arranged along the length direction of the installation tube;

[0042] A connecting block, one end of which is fixedly connected to the slider, and the other end of which is fixedly connected to the moving seat, and the connecting block is slidably arranged in the strip-shaped opening.

[0043] As a preferred technical solution of the present invention, the jetting assembly comprises:

[0044] An airbag, one end of which is connected to the inner surface of the mounting tube, and the other end of which is connected to the slider;

[0045] Two air pipes, one end of each of the air pipes is connected to the air bag, and one of the air pipes extends to the inside of the inner hood;

[0046] Two one-way valves, the two one-way valves are respectively installed on the two air pipes;

[0047] An air jet pipe, the air jet pipe is disposed on one side of the second opening and is connected to another air pipe;

[0048] A plurality of spray heads are installed on the spray pipe, and the plurality of spray heads are arranged toward the second opening.

[0049] As a preferred technical solution of the present invention, a cold source is installed on the outer hood, and a plurality of freezing structures are arranged inside the inner hood, each of which is connected to the cold source, and the freezing structures include:

[0050] a first mounting tube, the first mounting tube being fixed to an inner top surface of the inner hood;

[0051] A bellows, one end of which is connected to the first mounting tube;

[0052] a second mounting tube, one end of which is connected to the other end of the corrugated tube;

[0053] A flow guide cover, the flow guide cover is fixed to the other end of the second mounting tube;

[0054] Two fixing blocks, both of which are fixed on the second mounting tube;

[0055] An adjusting screw, the adjusting screw being rotatably mounted on the inner hood, wherein one of the fixing blocks is threadably sleeved on the adjusting screw;

[0056] A limit rod is fixed on the inner hood, and another fixed block is slidably sleeved on the limit rod.

[0057] As a preferred technical solution of the present invention, both the first mounting tube and the second mounting tube are hard tubes.

[0058] The present invention has the following beneficial effects:

[0059] 1. By designing the first and second rotating plates, the cold air can be effectively sealed in the inner cover during the movement of the conveying box, reducing the leakage of cold air to the outside, thereby saving the energy required for the operation of the condensing equipment and reducing energy consumption. Reducing the amount of cold air leakage means that the inner cover can maintain a more stable low-temperature environment, which helps to improve the quick-freezing efficiency and quality of frozen food, making the entire freezing process more efficient. In addition, saving energy and improving efficiency not only help to reduce operating costs, but also extend the service life of the equipment and reduce maintenance costs, thereby achieving long-term cost savings;

[0060] 2. The push plate drives the conveying box to move quickly to the inside of the inner hood, so that the time the conveying box stays in the process of the second rotating plate rotating is greatly shortened, thereby reducing the duration of cold air leakage in the inner hood. Since the conveying box moves quickly into place, the opening time of the second rotating plate is shortened, effectively reducing the leakage of cold air in the inner hood to the outside, and further reducing the loss of cold air;

[0061] 3. When the slider squeezes the airbag, the gas in the airbag sprays air to the second opening through the jet pipe and the jet head. This design prevents the cold air in the inner hood from escaping through the second opening by controlling the direction of the airflow, thereby reducing the loss of cold air. The fan-shaped structure of the jet head can expand the spray range of the airflow so that the airflow can fully cover the second opening. This design can ensure that the airflow guides the cold air in the inner hood when the second rotating plate is opened, so that it can stay inside better. By guiding and controlling the gas flow direction through the jet head, the design can ensure that the cold air in the inner hood will not leak out at will, maintaining the internal low temperature environment, which is very critical to maintaining quick freezing efficiency and food quality;

[0062] 4. The distance between the air guide hood and the conveyor box is very small, and the cold air is directly sprayed toward the inside of the conveyor box. This design can give full play to the freezing effect of the cold air, improve the freezing effect of the food in the conveyor box, and ensure that the food is frozen quickly. In addition, the height of the air guide hood can be adjusted. The staff can adjust the position of the air guide hood conveniently by turning the handle on the adjusting screw according to the needs of different sizes of food loaded in the conveyor box, so as to avoid the air guide hood hindering the movement of the food, thereby ensuring uniform coverage of the cold air and sufficient freezing of the food. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 This is a schematic diagram of the structure of a tunnel airflow optimized food quick-freezing tunnel proposed by the present invention;

[0064] Figure 2 is a schematic diagram of the cross-sectional structure of the outer hood;

[0065] Figure 3 for Figure 2 A magnified view of the structure at A;

[0066] Figure 4 for Figure 2 A magnified view of the structure at B;

[0067] Figure 5 is a schematic diagram of the cross-sectional structure of the fixing frame;

[0068] Figure 6 for Figure 5 A magnified view of the structure at C;

[0069] Figure 7 is a schematic diagram of the cross-sectional structure of the mounting frame;

[0070] Figure 8 for Figure 7 A magnified view of the structure at D;

[0071] Fig. 9 Schematic diagram of the frozen structure

[0072] In the figure: 1, outer hood; 2, conveying device; 3, conveying box; 4, inner hood; 51, first opening; 52, first rotating plate; 53, second opening; 54, second rotating plate; 61, fixed frame; 62, motor; 63, reciprocating screw; 64, guide rod; 65, moving seat; 71, fixed seat; 72, rotating seat; 73, push plate; 74, torsion spring; 75, limit plate; 81, bracket; 82, proximity switch; 91, mounting frame; 92, mounting cylinder; 93, slider; 94, strip opening; 95, connecting block; 101, air bag; 102, air pipe; 103, one-way valve; 104, jet pipe; 105, jet head; 111, first mounting pipe; 112, bellows; 113, second mounting pipe; 114, deflector; 115, fixed block; 116, adjusting screw; 117, limit rod. DETAILED DESCRIPTION

[0073] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0074] Reference Figure 1-9 A tunnel airflow optimized food quick-freezing tunnel comprises an outer hood 1; a conveying device 2, the conveying device 2 is mounted on the outer hood 1; a plurality of conveying boxes 3, the plurality of conveying boxes 3 are all placed on the conveying belt of the conveying device 2; an inner hood 4, the inner hood 4 is placed inside the outer hood 1;

[0075] The heat preservation structure is arranged on the outer cover 1 and the inner cover 4; the heat preservation structure comprises: two first openings 51, the two first openings 51 are respectively opened at the two ends of the outer cover 1; two first rotating plates 52, the two first rotating plates 52 are respectively rotatably installed in the two first openings 51; two second openings 53, the two second openings 53 are respectively opened at the two ends of the inner cover 4; two second rotating plates 54, the two second rotating plates 54 are respectively rotatably installed in the two second openings 53, and the conveying box 3 will first contact with the first rotating plate 52 at the feeding end of the outer cover 1 during the movement, and push the first rotating plate 52 to make the second rotating plate 54 rotate. The first rotating plate 52 rotates. When the conveying box 3 moves to the inside of the outer cover 1 and separates from the first rotating plate 52, the first rotating plate 52 will reverse and reset under the action of gravity and cover the first opening 51. As the conveying box 3 continues to move, the conveying box 3 will squeeze the second rotating plate 54 at one end of the inner cover 4, causing the second rotating plate 54 to rotate. It is worth noting that the second rotating plate 54 will no longer cover the second opening 53 when rotating. At this time, the cold air in the inner cover 4 will leak out through the second opening 53, but the first rotating plate 52 blocks the first opening 51, so the cold air will not leak into the external environment.

[0076] Two pushing structures are arranged inside the outer hood 1, and the two pushing structures are arranged at the two ends of the inner hood 4 respectively. The two pushing structures are arranged at the feeding end and the discharging end of the conveying device 2 respectively. The pushing structure close to the feeding end is placed between the inner hood 4 and the outer hood 1, and the pushing structure close to the discharging end is placed inside the inner hood 4; each pushing structure includes a driving component and a pushing component; both ends of the inner hood 4 are provided with a trigger component, and the driving component includes: a fixing frame 61; a motor 62, and the motor 62 is installed on the fixing frame 61; a reciprocating screw rod 63, one end of which is connected to the output shaft of the motor 62, and the reciprocating screw rod 63 is connected to the output shaft of the motor 62. The other end of the screw rod 63 is rotatably mounted on the fixed frame 61; two guide rods 64, both of which are fixed on the fixed frame 61; a moving seat 65, which is threadedly sleeved on the reciprocating screw rod 63, and the moving seat 65 is slidably sleeved on the two guide rods 64, and the pushing component includes: a fixed seat 71, which is fixed to the side of the moving seat 65; a rotating seat 72, which is rotatably mounted on the fixed seat 71 through a shaft; a push plate 73, which is fixed on the rotating seat 72; a torsion spring 74, one end of which is connected to the fixed seat 71, and the other end of which is connected to the rotating seat 72 The locking plate 75 is fixed to the side of the movable seat 65, and the locking plate 75 is located on one side of the push plate 73. Specifically, the conveying box 3 can push the push plate 73 to rotate toward one side during the movement, and the locking plate 75 is arranged on the other side of the push plate 73. That is, under the limiting action of the limiting plate 75, the push plate 73 cannot rotate in the direction opposite to the moving direction of the conveying box 3. This design makes it possible for the push plate 73 to neither block the movement of the conveying box 3 nor push the conveying box 3 to move after being separated from the conveying box 3. When the motor 62 is running, it can drive the reciprocating screw rod 63 to rotate. When the push plate 73 pushes the conveying box 3, the limiting plate 75 can block the push plate 73. Under the limiting action of the limiting plate 75, the push plate 73 cannot rotate, so that the push plate 73 can push the conveying box 3 to move. Therefore, the push plate 73 can push the conveying box 3 to move quickly, so that the conveying box 3 can be quickly moved to the inside of the inner hood 4. When the conveying box 3 moves quickly, the opening time of the second rotating plate 54 can be reduced, thereby reducing the leakage of cold air in the inner hood 4.

[0077] The trigger assembly includes: a bracket 81, the bracket 81 is fixed on the inner hood 4; a proximity switch 82, the proximity switch 82 is installed on the bracket 81, and the proximity switch 82 is electrically connected to the motor 62. When the second rotating plate 54 rotates, the second rotating plate 54 will gradually approach the proximity switch 82 on the corresponding bracket 81. When the second rotating plate 54 rotates to the sensing area of ​​the proximity switch 82, the proximity switch 82 transmits a signal to the controller and controls the motor 62 to energize and operate. This is the prior art and is not an innovative part of the present technical solution. It is not shown in the figure and will not be described in detail here.

[0078] Both ends of the inner hood 4 are provided with flow guide structures, each of which includes a sliding assembly and an injection assembly. The two sliding assemblies are respectively arranged on two fixing frames 61, and the sliding assemblies include: a mounting frame 91, the mounting frame 91 is fixed on the fixing frame 61, and the mounting frame 91 is a U-shaped structure; a mounting cylinder 92, the mounting cylinder 92 is fixed on the mounting frame 91; a slider 93, the slider 93 is slidably arranged inside the mounting cylinder 92; a strip opening 94, the strip opening 94 is opened on the outer peripheral surface of the mounting cylinder 92, and the strip opening 9 4 is arranged along the length direction of the mounting tube 92; a connecting block 95, one end of the connecting block 95 is fixedly connected to the slider 93, and the other end is fixedly connected to the moving seat 65, and the connecting block 95 is slidably arranged in the strip opening 94, and the jet assembly includes: an airbag 101, one end of the airbag 101 is connected to the inner surface of the mounting tube 92, and the other end of the airbag 101 is connected to the slider 93; two air pipes 102, one end of the two air pipes 102 are connected to the airbag 101, and one of the air pipes 102 extends to the inside of the inner hood 4; Two one-way valves 103, the two one-way valves 103 are respectively installed on the two air pipes 102; the jet pipe 104, the jet pipe 104 is placed on one side of the second opening 53, and the jet pipe 104 is connected to the other air pipe 102; a plurality of jet heads 105, the plurality of jet heads 105 are all installed on the jet pipe 104, and the plurality of jet heads 105 are all arranged toward the second opening 53. When the slider 93 squeezes the airbag 101, the gas in the airbag 101 will flow out through one of the air pipes 102 and enter the interior of the jet pipe 104. Then, the gas will be ejected toward the direction of the second opening 53 through the plurality of jet heads 105. In this case, the airflow ejected by the plurality of jet heads 105 can enter the interior of the inner hood 4 through the second opening 53. When the second rotating plate 54 is in the open state, the airflow ejected by the plurality of jet heads 105 can guide the air around the second opening 53. The special direction of the airflow can prevent the cold air in the inner hood 4 from escaping through the second opening 53, thereby further reducing the loss of cold air in the inner hood 4.

[0079] A cold source is installed on the outer hood 1, and a plurality of freezing structures are arranged inside the inner hood 4, each of which is connected to the cold source. The freezing structure includes: a first mounting pipe 111, which is fixed to the inner top surface of the inner hood 4; a bellows 112, one end of which is connected to the first mounting pipe 111; a second mounting pipe 113, one end of which is connected to the other end of the bellows 112, and the first mounting pipe 111 and the second mounting pipe 113 are both hard pipes; a deflector 114, which is fixed to the inner top surface of the inner hood 4. At the other end of the second mounting tube 113, the cold air will be ejected through the deflector 114. The distance between the deflector 114 and the conveying box 3 is very small, which enables the cold air to be ejected directly toward the inside of the conveying box 3. This design can improve the freezing effect of the food in the conveying box 3 and give full play to the freezing effect of the cold air; two fixing blocks 115, both of which are fixed on the second mounting tube 113; an adjusting screw 116, which is rotatably mounted on the inner hood 4, and one of the fixing blocks 115 is threadedly sleeved on the adjusting screw 116, a handle is installed on the top of the adjusting screw 116, and the handle is placed on the outside of the outer hood 1. The design of the handle is convenient for the staff to turn the adjusting screw 116. In addition, the outer hood 1 and the inner hood 4 are provided with avoidance ports adapted to the adjusting screw 116. The adjusting screw 116 passes through the two avoidance ports and is rotatably connected to the two avoidance ports through two bearings. The design of the bearings can prevent the cold air from leaking outward through the two avoidance ports; a limit rod 117, the limit rod 117 is fixed on the inner hood 4, and another fixed block 115 is slidably sleeved on the limit rod On the positioning rod 117, the staff turns the handle on the adjusting screw 116 to rotate the adjusting screw 116. Under the limiting action of the limiting rod 117, the adjusting screw 116 can drive the corresponding fixed block 115 to move when it rotates, and the second mounting tube 113 and the air guide cover 114 will also move accordingly. This makes it convenient for the staff to adjust the position of the air guide cover 114. In addition, the first mounting tube 111 and the second mounting tube 113 are connected by a retractable bellows 112, and the bellows 112 is designed to support the movement of the second mounting tube 113.

[0080] The specific working principle of the present invention is as follows:

[0081] When the tunnel airflow optimized food quick-freezing tunnel proposed by the present invention is in use, in the initial state, under the action of gravity, the two first rotating plates 52 and the two second rotating plates 54 are both in a vertical state, at which time the two first rotating plates 52 respectively cover the two first openings 51, and the two second rotating plates 54 respectively cover the two second openings 53. In addition, the cold source on the outer hood 1 transports cold air toward the inside of the inner hood 4. In this case, the low temperature in the inner hood 4 cannot escape to the outside through the two first openings 51 and the two second openings 53. Secondly, in the initial state, the movable seat 65 is located at one end of the reciprocating screw rod 63;

[0082] When freezing food, the staff puts the food into the conveying box 3 and starts the conveying device 2, so that the conveying device 2 drives the conveying box 3 to move. During the movement, the conveying box 3 will first contact the first rotating plate 52 at the feeding end of the outer cover 1 and push the first rotating plate 52 to rotate the first rotating plate 52. When the conveying box 3 moves to the inside of the outer cover 1 and separates from the first rotating plate 52, the first rotating plate 52 will reverse and reset under the action of gravity and cover the first opening 51. As the conveying box 3 continues to move, the conveying box 3 will squeeze the second rotating plate 54 at one end of the inner cover 4 to rotate the second rotating plate 54. It is worth mentioning that the second rotating plate 54 will no longer block the second opening 53 when rotating. At this time, the cold air in the inner cover 4 will leak out through the second opening 53, but the first rotating plate 52 blocks the first opening 51, so the cold air will not leak into the external environment. This design can effectively reduce the leakage of cold air inside the inner cover 4.

[0083] When the second rotating plate 54 rotates, the second rotating plate 54 will gradually approach the proximity switch 82 on the corresponding bracket 81. When the second rotating plate 54 rotates to the sensing area of ​​the proximity switch 82, the proximity switch 82 transmits a signal to the controller and controls the motor 62 to be powered on. When the motor 62 is running, it can drive the reciprocating screw 63 to rotate. Under the limiting action of the guide rod 64, the reciprocating screw 63 can drive the moving seat 65 to move when it rotates. When the moving seat 65 moves, it can drive the fixed seat 71 to move, and the push plate 73 will also move accordingly. When the push plate 73 pushes the conveying box 3, the limiting plate 75 The push plate 73 can block the push plate 73. Under the limiting action of the limiting plate 75, the push plate 73 cannot rotate, so that the push plate 73 can push the conveying box 3 to move. Therefore, the push plate 73 can push the conveying box 3 to move quickly, so that the conveying box 3 can be quickly moved to the inside of the inner hood 4. When the conveying box 3 moves quickly, the opening time of the second rotating plate 54 can be reduced, and the amount of cold air leakage in the inner hood 4 can be reduced. Further, when the moving seat 65 moves to the extreme position, it will move in the opposite direction. At this time, most of the conveying box 3 has moved to the inside of the inner hood 4, and the push plate 73 and the conveying box 3 are separated from each other. The conveying box 3 will continue to move under the action of the conveying device 2. When the conveying box 3 and the second rotating plate 54 are separated from each other, the second rotating plate 54 will reverse and reset under the action of gravity and cover the second opening 53. When the second rotating plate 54 is away from the sensing area of ​​the proximity switch 82, the motor 62 will drive the moving seat 65 to move to the initial position and cut off the power to stop. It should be noted that when the conveying box 3 moves toward the inside of the inner hood 4, the conveying box 3 will contact the push plate 73 and push the push plate 73 to rotate. When the conveying box 3 and the push plate 73 are separated from each other, the push plate 73 will be in the torsion spring 74. The locking cam 73 is pressed against the locking cam 74 so that the locking cam 73 can move relative to the locking cam 3. When the locking cam 73 is in the unlocked position, the locking cam 73 can be unlocked and the locking cam 3 can be unlocked.

[0084] The movable seat 65 can also drive the slider 93 to move through the connecting block 95 during the movement. When the slider 93 moves, it can squeeze the airbag 101. Two air pipes 102 are arranged on the airbag 101. Both air pipes 102 are equipped with one-way valves 103, and the flow limiting directions of the two one-way valves 103 are opposite. Specifically, one of the one-way valves 103 limits the gas to only enter the interior of the airbag 101, and the other one-way valve 103 limits the gas to only flow out from the interior of the airbag 101. Therefore, when the slider 93 squeezes the airbag 101, the gas in the airbag 101 will flow out through one of the air pipes 102 and enter the interior of the jet pipe 104. Then, the gas will be ejected toward the direction of the second opening 53 through a plurality of jet heads 105. In this case, the airflow ejected by the plurality of jet heads 105 can enter the interior of the inner hood 4 through the second opening 53, and the second rotating plate 54 is in the open state. When the airflow is ejected from the plurality of nozzles 105, it can guide the air around the second opening 53. The special direction of the airflow can prevent the cold air in the inner hood 4 from escaping through the second opening 53, further reducing the loss of cold air inside the inner hood 4. Furthermore, the nozzles 105 are fan-shaped, which can expand the spray range of the airflow so that the spray range of the airflow can fully cover the second opening 53. When the movable seat 65 is reset, the slider 93 will also be reset. When the slider 93 is reset, the airbag 101 can be stretched to extend and restore the airbag 101. When the airbag 101 is extended, another air pipe 102 can be used to perform a suction action, and the cold air in the inner hood 4 can be drawn into the interior of the airbag 101. This design enables the plurality of nozzles 105 to spray cold air toward the interior of the inner hood 4, minimizing the amount of normal temperature gas entering the interior of the inner hood 4, which is conducive to maintaining a low temperature environment inside the inner hood 4.

[0085] When the conveying box 3 is moving out of the inner hood 4, the conveying box 3 will squeeze the other second rotating plate 54, which will trigger the corresponding pushing structure and triggering assembly to operate, and the push plate 73 located inside the inner hood 4 can quickly push the conveying box 3 out of the inner hood 4. The specific working principle of this part is the same as the principle of the conveying box 3 entering the inner hood 4, which can be referred to above and will not be described in detail here. The pushing action of the push plate 73 can reduce the opening time of the second rotating plate 54 and reduce the leakage of cold air in the inner hood 4. In addition, when the other second rotating plate 54 is in the open state, the corresponding jet head 105 can also spray airflow, which can also suppress the escape of cold air inside the inner hood 4;

[0086] The interior of the inner hood 4 is provided with a plurality of freezing structures. Specifically, the cold air will be ejected through the air guide 114. The distance between the air guide 114 and the conveying box 3 is very small, so that the cold air can be ejected directly toward the interior of the conveying box 3. This design can improve the freezing effect of the cooling on the food in the conveying box 3 and give full play to the freezing effect of the cold air. In addition, the height of the air guide 114 can be adjusted. When the conveying box 3 is filled with food of different sizes, the staff can adjust the position of the air guide 114 to avoid the air guide 114 hindering the movement of the food. Specifically, the staff turns the handle on the adjusting screw 116 to rotate the adjusting screw 116. Under the limiting action of the limiting rod 117, the adjusting screw 116 can drive the corresponding fixing block 115 to move when it rotates, and the second mounting tube 113 and the air guide cover 114 will also move accordingly, which makes it convenient for the staff to adjust the position of the air guide cover 114. In addition, the first mounting tube 111 and the second mounting tube 113 are connected by a retractable bellows 112, and the bellows 112 is designed to support the movement of the second mounting tube 113.

[0087] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A food quick-freezing tunnel with optimized tunnel airflow, characterized in that: include: External hood (1) A conveying device (2), wherein the conveying device (2) is mounted on the outer hood (1); A plurality of conveying boxes (3), wherein the plurality of conveying boxes (3) are all placed on a conveying belt of a conveying device (2); An inner hood (4), the inner hood (4) being disposed inside the outer hood (1); A heat-insulating structure, wherein the heat-insulating structure is arranged on the outer hood (1) and the inner hood (4); The thermal insulation structure comprises: Two first openings (51), the two first openings (51) being respectively opened at two ends of the outer cover (1); Two first rotating plates (52), the two first rotating plates (52) being rotatably mounted in the two first openings (51) respectively; Two second openings (53), the two second openings (53) being respectively provided at two ends of the inner hood (4); Two second rotating plates (54), the two second rotating plates (54) being rotatably mounted in the two second openings (53) respectively; Two propulsion structures are arranged inside the outer hood (1), and the two propulsion structures are arranged at the feed end and the discharge end of the conveying device (2) respectively, the propulsion structure close to the feed end is arranged between the inner hood (4) and the outer hood (1), and the propulsion structure close to the discharge end is arranged inside the inner hood (4); Each of the pushing structures includes a driving component and a pushing component; The drive assembly comprises: Fixed frame (61); A motor (62), wherein the motor (62) is mounted on a fixing frame (61); A reciprocating screw rod (63), one end of the reciprocating screw rod (63) being axially connected to the output shaft of the motor (62), and the other end of the reciprocating screw rod (63) being rotatably mounted on the fixed frame (61); Two guide rods (64), both of which are fixed on the fixing frame (61); A movable seat (65), wherein the movable seat (65) is threadedly sleeved on the reciprocating screw rod (63), and the movable seat (65) is slidably sleeved on the two guide rods (64); Both ends of the inner hood (4) are provided with trigger components; The pushing component comprises: A fixed seat (71), wherein the fixed seat (71) is fixed on a side surface of the movable seat (65); A rotating seat (72), wherein the rotating seat (72) is rotatably mounted on the fixed seat (71) via a shaft; A push plate (73), wherein the push plate (73) is fixed on the rotating seat (72); a torsion spring (74), one end of the torsion spring (74) being connected to the fixed seat (71), and the other end of the torsion spring (74) being connected to the rotating seat (72); A limit plate (75), wherein the limit plate (75) is fixed to a side surface of the movable seat (65), and the limit plate (75) is located on one side of the push plate (73).

2. The food quick-freezing tunnel with optimized tunnel airflow according to claim 1, characterized in that: The trigger component comprises: A bracket (81), wherein the bracket (81) is fixed on the inner hood (4); A proximity switch (82), wherein the proximity switch (82) is mounted on the bracket (81), and the proximity switch (82) is electrically connected to the motor (62).

3. The food quick-freezing tunnel with optimized tunnel airflow according to claim 2, characterized in that: Both ends of the inner hood (4) are provided with flow guide structures, each of the flow guide structures comprises a sliding component and an air jet component, and the two sliding components are respectively arranged on two fixing frames (61).

4. The food quick-freezing tunnel with optimized tunnel airflow according to claim 3, characterized in that: The sliding assembly comprises: A mounting frame (91), wherein the mounting frame (91) is fixed on the fixing frame (61), and the mounting frame (91) is in a U-shaped structure; A mounting cylinder (92), wherein the mounting cylinder (92) is fixed on the mounting frame (91); A slider (93), the slider (93) being slidably disposed inside the mounting cylinder (92); A strip-shaped opening (94), wherein the strip-shaped opening (94) is opened on the outer peripheral surface of the installation tube (92), and the strip-shaped opening (94) is arranged along the length direction of the installation tube (92); A connecting block (95), one end of which is fixedly connected to the slider (93), and the other end of which is fixedly connected to the movable seat (65), and the connecting block (95) is slidably disposed in the strip-shaped opening (94).

5. The food quick-freezing tunnel with optimized tunnel airflow according to claim 4, characterized in that: The jet assembly comprises: An airbag (101), one end of the airbag (101) being connected to the inner surface of the mounting tube (92), and the other end of the airbag (101) being connected to the slider (93); Two air pipes (102), one end of each of the two air pipes (102) being connected to the air bag (101), and one of the air pipes (102) extending to the interior of the inner hood (4); Two one-way valves (103), the two one-way valves (103) being respectively installed on the two air pipes (102); An air jet pipe (104), the air jet pipe (104) being disposed on one side of the second opening (53), the air jet pipe (104) being connected to another air pipe (102); A plurality of spray heads (105), wherein the plurality of spray heads (105) are all mounted on the spray pipe (104), and the plurality of spray heads (105) are all arranged toward the second opening (53).

6. The food quick-freezing tunnel with optimized tunnel airflow according to claim 1, characterized in that: A cold source is installed on the outer hood (1), and a plurality of freezing structures are arranged inside the inner hood (4), each of the freezing structures is connected to the cold source, and the freezing structures include: A first mounting tube (111), the first mounting tube (111) being fixed to an inner top surface of the inner hood (4); a bellows (112), one end of the bellows (112) being in communication with the first mounting tube (111); a second mounting tube (113), one end of the second mounting tube (113) being in communication with the other end of the corrugated tube (112); A flow guide cover (114), wherein the flow guide cover (114) is fixed to the other end of the second mounting tube (113); Two fixing blocks (115), both of the fixing blocks (115) being fixed on the second mounting tube (113); an adjusting screw (116), the adjusting screw (116) being rotatably mounted on the inner hood (4), wherein one of the fixing blocks (115) is threadably sleeved on the adjusting screw (116); A limiting rod (117), wherein the limiting rod (117) is fixed on the inner hood (4), and the other fixing block (115) is slidably sleeved on the limiting rod (117).

7. The food quick-freezing tunnel with optimized tunnel airflow according to claim 6, characterized in that: The first mounting tube (111) and the second mounting tube (113) are both hard tubes.

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