Double-spiral quick-freezing device for food freezing

Abstract

The invention relates to the field of food freezing, and discloses a double-helix quick-freezing device for food freezing, which comprises a freezing box body, a first screw, a second screw, a first screw and a second screw, and is characterized in that the freezing box body is internally provided with two sleeves; the spiral track is arranged on one side of the freezing box body, a surrounding type mesh belt is arranged on the spiral track, and the mesh belt is continuously arranged along the spiral track; through cooperation of the spiral track and the surrounding type mesh belt, the mesh belt is conveyed through the driving component, continuous conveying of food is achieved, the conveying path of the food in the freezing box body is prolonged, the food has a sufficient cooling stroke in the freezing process, and the overall freezing efficiency is improved. Due to the double-spiral path design, the problem that the freezing time of food in traditional freezing equipment is insufficient is effectively solved, it is ensured that the food fully passes through a freezing area, and the freezing effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of food freezing, in particular to a double-spiral quick-freezing device for food freezing. Background Art

[0002] With the development of cold chain logistics and food processing technologies, quick-frozen foods have become an important form of storage and transportation for fruit and vegetable processing, pre-prepared dishes, and aquatic products. The quick-freezing process quickly reduces the core temperature of food to below -18°C, rapidly passing through the zone of maximum ice crystal formation and inhibiting microbial growth and enzymatic reactions. This effectively extends the shelf life and preserves the color and nutritional content of ingredients. It is widely used in industrial-scale production. To improve quick-freezing efficiency and space utilization, spiral freezing structures are gradually replacing traditional linear quick-freezing equipment, becoming a key development direction in modern food quick-freezing technology.

[0003] In the existing technology, a spiral mesh belt freezing device is often used to freeze food. The device usually includes a spiral conveyor mesh belt arranged around a central column. A motor drives the mesh belt to lift and lower the food along a spiral path. During operation, high-speed, low-temperature cold air is blown all over the food to achieve rapid cooling. Some equipment also has two spiral paths, i.e. a double helix structure, to increase the freezing flux and system processing capacity. This type of structure can be applied to various types of food such as frozen corn kernels, green beans, strawberries, fresh shrimp, prepared pastries, etc. By setting up multiple air ducts or circulating fans, the cold air and the mesh belt can flow synchronously, improving the heat exchange efficiency, thereby improving the freezing rate and food quality.

[0004] However, some technical issues still exist in the above-mentioned existing technologies. Because the food moves synchronously with the mesh belt in a stationary state during transportation, lacking any mechanism for flipping, disturbing, or shaking, the lower surface of the food remains in contact with the mesh belt for a long time, preventing the bottom surface from being fully exposed to the cold air and resulting in incomplete freezing. This is particularly true for lightweight fruits and vegetables or flaky ingredients, which often result in uneven freezing or residual temperature zones.

[0005] Therefore, there is an urgent need to propose a double-spiral quick-freezing device for food freezing, which can realize the turning and disturbance of fruits and vegetables during the transportation process, thereby improving the uniformity of the cold air effect and the freezing efficiency. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention provides a double-spiral quick-freezing device for food freezing, which aims to alleviate the above-mentioned problems at least to a certain extent.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: A double-spiral quick-freezing device for freezing food, comprising: A freezing box body, wherein two sleeves are provided in the freezing box body; A spiral track is provided on one side of the freezing box body, and a surrounding mesh belt is provided on the spiral track, and the mesh belt is continuously arranged along the spiral track; A cold chamber is provided in the sleeve, and the cold chamber is connected to an air inlet pipe; A plurality of cooling air nozzles are provided on the outer wall of the sleeve, facing the spiral track, and the cooling air nozzles are arranged in layers and staggered along the height direction of the spiral track around the outer wall of the sleeve; A pipe provided on the cold air nozzle, one end of which extends into the cold chamber and is used to connect the cold air nozzle and the cold chamber; A driving component provided between the freezing box and the mesh belt, for driving the mesh belt to perform continuous conveying motion along a spiral track; The disturbance component provided between the sleeve and the cold chamber is used for synchronously driving the plurality of cold air nozzles to move into the conveying channel on the spiral track, and driving the cold air nozzles to rotate when they move to a predetermined position.

[0008] Preferably, the driving component includes a support frame connected to both sides of the freezing box body, and a plurality of conveying shafts are rotatably connected to the support frame. The mesh belt passes around the plurality of conveying shafts, and a motor is connected to one of the support frames, and the driving shaft of the motor is connected to one of the conveying shafts.

[0009] Preferably, the disturbance component includes a spiral connecting frame arranged between the sleeve and the cold chamber, a plurality of connecting rods a are connected to the spiral connecting frame, a plurality of cold air nozzles are connected to the corresponding connecting rods a, a plurality of avoidance openings a are opened on the outer wall of the cold chamber, the upper part of the spiral connecting frame passes through the avoidance openings a and extends into the cold chamber, a baffle covering the avoidance openings a is connected to the spiral connecting frame to prevent cold air from overflowing from the avoidance openings a, a cylinder is connected to the sleeve, and the telescopic shaft of the cylinder extends to the interior of the cold chamber and is connected to the spiral connecting frame.

[0010] Preferably, the pipeline includes a hose connected to the cold air nozzle, the cold cavity is connected to a hard pipe, the hard pipe passes through the cold cavity and the sleeve and is connected to the hose, and the spiral connecting frame is provided with an avoidance opening b for avoiding the hard pipe.

[0011] Preferably, the disturbance component further comprises a slide rail connected to the cold air nozzle, a slider a is slidably connected in the slide rail, the connecting rod a is rotatably connected in the slider a, a slide groove is formed on the outer wall of the sleeve, a slider b is slidably connected in the slide groove, and the cold air nozzle is connected to a connecting rod b rotatably connected to the slider b; The slide rail is provided with a plurality of wedge-shaped openings, the slider a is slidably connected to a wedge-shaped strip that cooperates with the wedge-shaped openings, and a spring a is connected between the wedge-shaped strip and the slider a; The inner wall of the slider b is provided with a plurality of damping openings, each of which is a semicircular opening. A damping rod cooperating with the damping opening is slidably connected to the connecting rod b, and a spring b is connected between the damping rod and the connecting rod b.

[0012] Preferably, the disturbance component can gradually compress the space in the cold chamber when moving and rotating the cold air nozzle, so as to accelerate the speed of the cold air passing through the pipe; An adjustment cylinder is connected to the cold chamber, and a plurality of compression chambers are opened on the outer wall of the adjustment cylinder. A push plate is slidably connected to the compression chamber, and extension plates are slidably connected on both sides of the push plate. A spring c is connected between the extension plate and the push plate. A connecting shaft is connected to the spiral connecting frame, and the connecting shaft extends to the interior of the adjustment cylinder and is rotatably connected to a plurality of connecting rods c. The other end of the connecting rod c is rotatably connected to the push plate.

[0013] Preferably, the disturbance component is capable of closing the air inlet pipe when the cold air nozzle is moved to a preset position, and opening the air inlet pipe when the cold air nozzle is rotated to a preset angle; An air intake cylinder is slidably connected inside the air intake pipe, and an air inlet, an air outlet and a sliding port are respectively provided on the top and the outer wall of the air intake cylinder. A closed cylinder is connected to the inner wall of the air intake pipe, which is located inside the air intake cylinder and below the air inlet. A mounting bracket is connected to the closed cylinder, and the mounting bracket is connected to the air intake pipe through the sliding port. A magnet a is connected to the air intake cylinder, and a magnet b that is magnetically attracted to the magnet a is connected to the spiral connecting bracket.

[0014] Preferably, a spring d is connected between the magnet a and the air intake pipe.

[0015] In summary, the present invention mainly has the following beneficial effects: This application utilizes a spiral track and a wraparound mesh belt, using a drive component to convey the mesh belt, to achieve continuous food transportation. This extends the food's conveying path within the freezer, allowing the food to have sufficient cooling travel during the freezing process, thereby improving overall freezing efficiency. The double-helix path design effectively avoids the problem of insufficient freezing time for food in traditional freezing equipment, ensuring that the food passes fully through the freezing zone and improving the freezing effect.

[0016] In order to address the problem that food moves synchronously with the mesh belt in a stationary state during transportation, resulting in the lower surface adhering to the mesh belt for a long time and incomplete freezing, the present application provides multiple cold air nozzles arranged in layers and staggered positions along the outer wall of the sleeve. The cold air nozzles are connected to the cold cavity through pipes. After the low-temperature cold air enters the cold cavity through the air inlet pipe, it is directly guided to each cold air nozzle through the pipe for spraying, ensuring that the food surface is quickly cooled.

[0017] This application uses a disturbance component to drive the cold air nozzle to move close to the spiral track, and cooperates with the synchronous compression of the cold cavity to force the cold air inside the cavity to be discharged quickly, significantly increasing the speed of the jet airflow and enhancing the impact force on the food. The cold air nozzle gradually adjusts the spray direction during the movement, so that the jet airflow gradually transitions to the opposite direction of the mesh belt conveyor. The reverse airflow strongly impacts the food on the mesh belt, causing the lightweight food to roll and shake, breaking the static contact between the food and the mesh belt, and fully exposing the lower surface of the food to the cold air environment, significantly improving the comprehensiveness and uniformity of freezing. At the same time, the reverse airflow causes local obstruction to the food conveyance, prolonging the residence time of the food in the freezing path, further improving the thoroughness of freezing.

[0018] Furthermore, the disturbance component rationally controls the opening and closing rhythm of the intake duct, closing it during cavity compression to prevent airflow recoil and maintain the impact velocity of the jet. When the cooling nozzle rotates to the preset injection angle, completing a disturbance and preparing to return, the intake duct promptly opens to replenish cold air, preventing negative pressure in the cold cavity due to space recovery and ensuring a continuous and stable airflow supply.

[0019] This application realizes the dynamic coordination of food transportation, air flow disturbance, nozzle angle adjustment, cold chamber compression and air intake rhythm control, which can effectively solve the problems of uneven freezing, incomplete freezing, and the formation of residual temperature zones in light food in the existing technology, and improve the freezing uniformity and overall freezing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the freezing box of the present invention; Figure 3 It is a schematic diagram of the spiral track structure of the present invention; Figure 4 It is a schematic diagram of the sleeve structure of the present invention; Figure 5 yes Figure 4 A magnified schematic diagram of the local structure at point A in the middle; Figure 6 is a schematic cross-sectional view of the sleeve structure of the present invention; Figure 7 It is a schematic diagram of the cold chamber structure of the present invention; Figure 8 It is a schematic structural diagram of the spiral connecting frame of the present invention; Figure 9 It is a schematic diagram of the structure of the cold air nozzle of the present invention; Figure 10 is a schematic cross-sectional view of the slide rail structure of the present invention; Figure 11 is a schematic cross-sectional view of the slider structure of the present invention; Figure 12is a schematic cross-sectional view of the adjustment cylinder structure of the present invention; Figure 13 It is a cross-sectional schematic diagram of the air intake pipe structure of the present invention.

[0021] Reference numerals: 100, refrigeration box; 101, sleeve; 102, spiral track; 103, mesh belt; 104, cold chamber; 105, air inlet pipe; 106, cold air nozzle; 107, support frame; 108, conveyor shaft; 109, motor; 200, spiral connecting frame; 201, connecting rod a; 202, avoidance opening a; 203, baffle; 204, cylinder; 205, hose; 206, hard pipe; 207, avoidance opening b; 300, slide rail; 301, slider a; 302, slide groove; 303, slider b; 304, connecting rod b; 305, wedge-shaped opening; 306, wedge-shaped strip; 307, spring a; 308, damping opening; 309, damping rod; 310, spring b; 400, adjustment cylinder; 401, compression chamber; 402, push plate; 403, extension plate; 404, spring c; 405, connecting shaft; 406, connecting rod c; 500, air inlet cylinder; 501, air inlet; 502, air outlet; 503, sliding port; 504, closing cylinder; 505, mounting bracket; 506, magnet a; 507, magnet b; 508, spring d. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] refer to Figures 1-13 This embodiment provides a double-spiral quick-freezing device for freezing food, comprising: The freezing box 100 has two sleeves 101 disposed therein. The two sleeves 101 are vertically arranged at intervals from each other and are used to support the surrounding arrangement of the spiral track 102.

[0024] A spiral track 102 is positioned on one side of the freezer housing 100. It enters from one side and exits from the other, looping around the two sleeves 101 in sequence to form a continuous double-helix path. A wraparound mesh belt 103 is positioned on the spiral track 102. The mesh belt 103 is continuously arranged along the spiral track 102, with its head and tail connected to form a closed-loop conveyor structure for carrying and continuously transporting the food to be frozen.

[0025] A cold chamber 104 is provided in the sleeve 101 . The cold chamber 104 is connected to an air inlet pipe 105 . The air inlet pipe 105 is used to connect to a cold air source to continuously provide cold air to the cold chamber 104 .

[0026] Multiple cold air nozzles 106 are installed on the outer wall of sleeve 101. These nozzles 106 are arranged toward spiral track 102 and spray cold air onto the food on mesh belt 103. The nozzles 106 are arranged in layers and staggered along the height of the outer wall of sleeve 101. This surrounding distribution allows cold air to be evenly applied to the food on mesh belt 103 from multiple angles and directions, improving freezing uniformity and cold air utilization.

[0027] The cold air nozzle 106 is connected to the cold chamber 104 via a pipe provided on the nozzle. One end of the pipe extends into the cold chamber 104 to guide the cold air in the cold chamber 104 to the cold air nozzle 106 .

[0028] A driving component is provided between the freezing box 100 and the mesh belt 103 for driving the mesh belt 103 to continuously and uniformly transport the food along the spiral track 102 so that the food can pass through the freezing channel smoothly on the spiral track 102 .

[0029] A disturbance component is provided between the sleeve 101 and the cold chamber 104. The disturbance component is used to synchronously drive multiple cold air nozzles 106 to move into the conveying channel on the spiral track 102, and drive the cold air nozzles 106 to rotate when moving to a predetermined position, so that the direction of the air flow ejected by the cold air nozzles 106 is opposite to the conveying direction of the mesh belt 103.

[0030] In addition, during the movement and rotation of the cold air nozzle 106 , the internal space of the cold chamber 104 is gradually compressed, and the air flow speed increases accordingly.

[0031] To prevent cold air from backflowing into the cold chamber 104 during the nozzle descent and space compression process, the air inlet pipe 105 is closed when the cold air nozzle 106 moves to a preset position and the cold chamber 104 is compressed, preventing the reverse flow of external cold air. When the cold air nozzle 106 rotates to a preset angle, the air inlet pipe 105 is opened to replenish cold air in a timely manner.

[0032] Through the above arrangement, the spiral track 102 cooperates with the wraparound mesh belt 103, and the mesh belt 103 is driven by a drive component to achieve continuous food conveyance. Food is placed on the mesh belt 103 and continuously moves along the path of the spiral track 102. The spiral track 102 enters from one side of the freezer housing 100 and exits from the other. The double-helix structure effectively extends the conveying path, ensuring that the food has sufficient cooling travel within the freezer housing 100, thereby improving overall freezing efficiency.

[0033] The food moves synchronously with the mesh belt 103 on the mesh belt 103. If there is no intervention, the food and the mesh belt 103 are in a relatively static contact state for a long time. In particular, the lower surface of the food is continuously attached to the mesh belt 103, and it is difficult to be fully exposed to the cold air environment, resulting in freezing dead corners, causing insufficient freezing of the bottom surface of the food, easily forming a residual temperature zone, and causing problems of incomplete freezing and uneven freezing.

[0034] To address these issues, the present device is equipped with multiple cold air nozzles 106 arranged in staggered layers along the outer wall of sleeve 101. These nozzles 106 are connected to a cold chamber 104 within sleeve 101 via pipes. A cold air source continuously delivers cold air through an air inlet pipe 105. After entering the cold chamber 104 through the air inlet pipe 105, the low-temperature cold air is directed directly to each cold air nozzle 106 via pipes. These nozzles 106 then spray the cold air into the delivery channel on spiral track 102. Throughout this process, the cold air continuously flows within the cold chamber 104, forming a continuous airflow path through the pipes and the cold air nozzles 106, effectively freezing the food.

[0035] During operation, the agitating element can be used to intermittently adjust the state of the cold air nozzle 106. Driven by the agitating element, the cold air nozzle 106 can move closer to the spiral track 102. As the nozzle moves, the interior of the cold chamber 104 is simultaneously compressed. During this compression process, the gas within the cold chamber 104 is forced to rapidly evacuate and be ejected through the pipes and cold air nozzle 106. This effectively increases the airflow velocity, creates a higher kinetic energy airflow, and significantly enhances the impact of the airflow on the food.

[0036] When the cold air nozzle 106 moves to the preset injection position, the disturbance component drives the nozzle to rotate and adjusts the cold air injection direction so that the injection airflow is opposite to the conveying direction of the mesh belt 103, forming a reverse high-speed airflow.

[0037] On the one hand, the counter-flow design exerts a strong reverse impact force on the food on the mesh belt 103, causing lightweight foods (such as vegetables, green beans, and corn kernels) to tumble, shake, or briefly leave the mesh belt 103 under the impact of the cold air. This effectively disturbs the food from its static state, completely breaking the fixed contact between the food and the mesh belt 103 and exposing the lower surface of the food to the cold airflow, thereby improving the comprehensiveness and uniformity of freezing. On the other hand, the counter-flow direction is opposite to the conveying direction of the mesh belt 103, creating a localized obstruction on the food, slowing its conveying speed and appropriately extending its residence time on the freezing path. This further ensures that the internal temperature of the food quickly drops to the target value, thereby improving the thoroughness of freezing.

[0038] While the cold air nozzle 106 moves to compress the space of the cold chamber 104, in order to avoid airflow backflow, the disturbance component controls the air inlet pipe 105 to be in a closed state to prevent airflow backflow or pressure relief, ensure that the airflow pressure is concentrated in the injection path, and the airflow injection speed is effectively improved. When the cold air nozzle 106 rotates to the preset injection angle and completes the disturbance of the food, when the angle and position of the cold air nozzle 106 are about to be returned, the space in the cold chamber 104 also needs to be gradually restored. If the cold air is not replenished in time, a negative pressure will be formed due to the thin gas, which may cause the cold air to be sucked back. Therefore, when the cold air nozzle 106 rotates to the preset injection angle, the disturbance component controls the opening of the air inlet pipe 105 to replenish cold air, prevent the formation of negative pressure in the cold chamber 104, and ensure that the airflow supply is continuous and stable.

[0039] After a disturbance injection cycle is complete, the cold air nozzle 106, driven by the disturbance component, returns to its original position, the cold chamber 104 space is restored, and the air inlet pipe 105 remains open, ready for the next disturbance injection cycle. This action can be repeated periodically, and the coordinated movement of multiple cold air nozzles 106 can cover the entire double-helix path, effectively achieving large-scale path disturbance.

[0040] In this application, a closed-loop control of dynamic disturbance and airflow speed regulation is formed through the synchronous movement and rotation of the cold air nozzle 106, the spatial compression of the cold chamber 104, and the coordination of the airflow rhythm of the air inlet pipe 105. This can effectively solve the problems in the prior art such as the movement of food with the mesh belt 103 in a stationary state during transportation, insufficient freezing of the lower surface, uneven freezing of light fruits and vegetables, and residual temperature zones.

[0041] In this embodiment, the driving component includes a support frame 107 connected to both sides of the freezing box 100. A plurality of conveying shafts 108 are rotatably connected to the support frame 107, and the mesh belt 103 passes around the plurality of conveying shafts 108.

[0042] A motor 109 is connected to one of the support frames 107 , and a drive shaft of the motor 109 is connected to one of the conveying shafts 108 . The conveying shaft 108 is driven to rotate by the motor 109 , thereby driving the mesh belt 103 to continuously convey along the spiral track 102 .

[0043] Through the above arrangement, the support frame 107 supports multiple conveying shafts 108, and the motor 109 drives the connected conveying shafts 108 to rotate. The rotation of the conveying shafts 108 can directly transmit power to the mesh belt 103, driving the mesh belt 103 to continuously convey food along the double helical track 102.

[0044] During the food conveying process, the food moves stably and continuously with the mesh belt 103, ensuring that the food can pass through the nozzle disturbance zone and the cold air injection zone at the set speed, providing a stable food conveying rhythm for the subsequent dynamic disturbance of the cold air nozzle 106.

[0045] In this embodiment, the disturbance component includes a spiral connection frame 200 disposed between the sleeve 101 and the cold chamber 104. The spiral connection frame 200 is arranged spirally along the outer wall of the sleeve 101.

[0046] A plurality of connecting rods a201 are connected to the spiral connecting frame 200, one end of the connecting rod a201 is fixed to the spiral connecting frame 200, and the other end is connected to the corresponding cold air nozzle 106. The movement of the spiral connecting frame 200 can drive the plurality of cold air nozzles 106 to move axially into the conveying channel on the spiral track 102 at the same time.

[0047] To achieve structural interpenetration between the spiral connection frame 200 and the cold chamber 104, a plurality of escape openings a202 are provided on the outer wall of the cold chamber 104. The upper portion of the spiral connection frame 200 extends through the escape openings a202 into the cold chamber 104. To prevent cold air from leaking through the escape openings a202, a baffle 203 is attached to the spiral connection frame 200. The baffle 203 covers the escape openings a202, effectively preventing cold air from escaping through the escape openings a202.

[0048] The sleeve 101 is connected to a cylinder 204, and the telescopic shaft of the cylinder 204 penetrates into the interior of the cold chamber 104 and is fixedly connected to the spiral connecting frame 200. The telescopic action of the cylinder 204 can drive the spiral connecting frame 200 to axially displace.

[0049] Through the above arrangement, during operation, the telescopic shaft of the cylinder 204 pushes the spiral connecting frame 200 to move linearly along the axial direction of the sleeve 101. The spiral connecting frame 200 is connected to the multiple cold air nozzles 106 through the connecting rod a201. Driven by the cylinder 204, the connecting rod a201 synchronously transmits the displacement, so that the multiple cold air nozzles 106 are radially close to the conveying channel on the spiral track 102. Through the above structure, the synchronous movement of the multiple cold air nozzles 106 can be effectively achieved, which is convenient for subsequent high-flow rate cold air injection. The synchronous approach of the cold air nozzles 106 helps to reduce the injection distance between the nozzles and the food, increase the intensity of the cold air flow directly acting on the food, and enhance the disturbance effect of the cold air injection.

[0050] In this embodiment, the pipeline includes a hose 205 connected to the cold air nozzle 106. The hose 205 is used to guide the cold air to the cold air nozzle 106 to achieve cold air injection.

[0051] The cold chamber 104 is connected to a hard pipe 206, which passes through the cold chamber 104 and the sleeve 101 and is connected to the hose 205. The hard pipe 206 is used to stably guide the cold air from the cold chamber 104 to the hose 205 connected to the cold air nozzle 106.

[0052] In order to avoid interference between the spiral connecting frame 200 and the hard tube 206 during movement, an avoidance opening b207 is opened on the spiral connecting frame 200 for avoiding the hard tube 206. The size and position of the avoidance opening b207 are adapted to the installation path of the hard tube 206, ensuring that the spiral connecting frame 200 will not affect the structure of the hard tube 206 during movement.

[0053] With this arrangement, cold air, after being supplied through the air inlet pipe 105, first enters the cold chamber 104 and then flows out through the rigid tube 206 fixed to the cold chamber 104. The rigid tube 206 has high structural strength and provides a stable and fixed cold air channel. The outlet of the rigid tube 206 is connected to the hose 205 connected to the cold air nozzle 106. The hose 205 acts as a flexible connector, adapting to the displacement changes of the cold air nozzle 106 during movement and rotation.

[0054] Driven by the spiral connector 200, the cooling nozzle 106 moves synchronously, and the hose 205 adjusts synchronously with the cooling nozzle 106, preventing the airflow path from twisting or breaking due to nozzle movement. The flexible fit of the hose 205 effectively prevents gas leakage or pipe rupture caused by structural interference or stretching, ensuring a continuous and stable jet flow.

[0055] To ensure that the spiral connector 200 does not interfere with the rigid tube 206 during movement, a clearance opening b207 is specifically provided on the spiral connector 200. The size and shape of the clearance opening b207 precisely match the installation path of the rigid tube 206, ensuring that when the spiral connector 200 moves axially under the drive of the cylinder 204, it can smoothly pass through the area of ​​the rigid tube 206 without affecting the structural stability of the rigid tube 206. The design of the clearance opening b207 ensures both the free movement of the spiral connector 200 and the integrity of the airflow path.

[0056] In this embodiment, the disturbance component further includes a slide rail 300 provided on the cold air nozzle 106 , a slider a301 is slidably connected in the slide rail 300 , and a connecting rod a201 is rotatably connected in the slider a301 .

[0057] A sliding groove 302 is provided on the outer wall of the sleeve 101, and a slider b303 is slidably connected in the sliding groove 302. A connecting rod b304 is connected to the cold air nozzle 106 and is rotatably connected to the slider b303. One end of the connecting rod b304 is connected to the cold air nozzle 106, and the other end is connected to the slider b303.

[0058] There are multiple wedge-shaped openings 305 in the slide rail 300, and a wedge-shaped bar 306 that cooperates with the wedge-shaped openings 305 is slidably connected to the slider a301. A spring a307 is connected between the wedge bar 306 and the slider a301. The spring a307 provides continuous elastic force to the wedge bar 306, so that a certain friction force is generated between the wedge bar 306 and the wedge-shaped openings 305.

[0059] The inner wall of the slider b303 is provided with a plurality of damping openings 308, which are semicircular openings. A damping rod 309 is slidably connected to the connecting rod b304 and cooperates with the damping opening 308. A spring b310 is connected between the damping rod 309 and the connecting rod b304. The spring b310 provides continuous elastic force to the damping rod 309, so that a certain friction force is generated between the damping rod 309 and the damping opening 308.

[0060] Through the above arrangement, the cylinder 204 drives the spiral connection frame 200 to move axially downward, and the connecting rod a201 pulls the slider a301 downward synchronously.

[0061] Friction is continuously generated between the wedge strip 306 and the wedge opening 305 via the spring a 307 , and friction is continuously generated between the damping rod 309 and the damping opening 308 via the spring b 310 .

[0062] At this stage, the cold air nozzle 106, connecting rod a201, slider a301, slide rail 300, connecting rod b304 and slider b303 move downward synchronously as an integral structure. The friction between the wedge bar 306 and the wedge mouth 305, and the damping rod 309 and the damping mouth 308 jointly limit the relative displacement of each moving part. The entire structure is in a rigid motion state, ensuring that the vertical downward movement process of the cold air nozzle 106 is stable and controlled.

[0063] When slider b303 reaches the end of slot 302, it cannot slide further downward. The movement of connecting rod b304 is now limited by the travel of slot 302, hindering the movement of the structure. Cylinder 204 and screw connector 200 continue to exert downward force, causing connecting rod a201 to continue moving downward. The friction between wedge strip 306 and wedge opening 305, and between damping rod 309 and damping opening 308, is gradually overcome by the driving force of cylinder 204.

[0064] When the downward force applied by the connecting rod a201 is greater than the friction resistance provided by the spring a307 and the spring b310, the motion mode switch occurs: The wedge strip 306 begins to slide out of the wedge opening 305, and the damping rod 309 moves out of the damping opening 308. The slider a301 can slide in the slide rail 300, and the cooling air nozzle 106 rotates around the connecting rod b304. At this time, the cooling air nozzle 106 completes the switch from vertical downward movement to rotational movement.

[0065] Through the above-described motion process, during the early stages of the disturbance phase, the cold air nozzle 106 approaches the mesh belt 103 with stable vertical movement, ensuring that the nozzle can penetrate deeply into the conveying channel on the spiral track 102. This brings the nozzle closer to the mesh belt 103, facilitating the direct effect of high-velocity cold air on the food surface. In the later stages of the motion, the cold air nozzle 106 rotates around the connecting rod b304, allowing the airflow to flow in the opposite direction of the conveying direction of the mesh belt 103. This counter-injected cold airflow creates an effective reverse impact force on the food on the mesh belt 103, causing the lightweight food to tumble and shake under the impact of the cold air, disrupting the food's long-term attachment to the mesh belt 103 and ensuring that the food's lower surface is fully exposed to the cold air, further improving the comprehensiveness and uniformity of freezing.

[0066] At the same time, the reverse jet airflow creates a local airflow blockage during the food conveying process, which can moderately slow down the food conveying speed, prolong the food's residence time in the spiral track 102, and help further reduce the internal temperature of the food, thereby improving the thoroughness of freezing.

[0067] In this embodiment, an adjustment cylinder 400 is connected to the cold chamber 104 . A plurality of compression chambers 401 are defined on the outer wall of the adjustment cylinder 400 . The compression chambers 401 are used to achieve dynamic adjustment of the space in the cold chamber 104 .

[0068] A push plate 402 is slidably connected in the compression chamber 401 , and extension plates 403 are slidably connected on both sides of the push plate 402 . A spring c404 is connected between the push plate 402 and the corresponding extension plate 403 , and the spring c404 is used to provide elastic reset force for the push plate 402 .

[0069] The spiral connecting frame 200 is connected to a connecting shaft 405 which penetrates into the adjusting cylinder 400 and is rotatably connected to a plurality of connecting rods c406 . One end of the connecting rod c406 is rotatably connected to the connecting shaft 405 , and the other end is rotatably connected to the push plate 402 .

[0070] With the above arrangement, in this embodiment, the spiral connecting frame 200 moves axially downward under the drive of the cylinder 204, and the connecting shaft 405 moves downward synchronously with the spiral connecting frame 200. Because the connecting shaft 405 and the connecting rod c406 are rotationally connected, the connecting rod c406 rotates synchronously with the movement of the connecting shaft 405, and the other end of the connecting rod c406 drives the push plate 402 to slide along the compression chamber 401.

[0071] Because compression chamber 401 has a conical cross-section, push plate 402, driven by connecting rod c406, gradually moves toward the outside of the conical chamber. As push plate 402 moves, its sides gradually separate from the conical chamber's sidewalls, creating a gap that gradually expands with displacement. Spring c404 is initially compressed. At this point, the elastic force of spring c404 continuously pushes out extension plate 403, actively filling the gap that gradually forms between the sides of push plate 402 and the conical sidewalls.

[0072] When the push plate 402 slides toward the outside of the compression chamber 401, it is equivalent to compressing the available space in the cold chamber 104, so that the cold air is subjected to stronger squeezing in the path of flowing through the cold chamber 104 to the cold air nozzle 106, and the cold air injection speed is significantly improved, which can significantly enhance the impact force of the nozzle injection airflow and improve the cold air disturbance efficiency.

[0073] In this embodiment, the air inlet pipe 105 is used to receive an external cold air source, and an air inlet cylinder 500 is slidably connected to the air inlet pipe 105. The top of the air inlet cylinder 500 is provided with an air inlet port 501, and the outer wall of the air inlet cylinder 500 is provided with an air outlet port 502 and a sliding port 503 in sequence. The air inlet port 501 is used for the entry of cold air, and the air outlet port 502 is used for the discharge of cold air into the cold chamber 104.

[0074] The inner wall of the air inlet pipe 105 is fixedly connected with a closed cylinder 504, which is arranged inside the air inlet cylinder 500 and below the air inlet 501. The closed cylinder 504 is used to define the air flow path.

[0075] The sealing cylinder 504 is connected to a mounting bracket 505 , which is fixed to the air inlet pipe 105 via a sliding opening 503 . The mounting bracket 505 provides a movement guide for the air inlet cylinder 500 to ensure a stable sliding process.

[0076] The outer wall of the air intake cylinder 500 is connected to a magnet a506, and the spiral connection frame 200 is provided with a magnet b507 corresponding to the magnet a506, forming a magnetic attraction structure between the magnet a506 and the magnet b507.

[0077] Through the above arrangement, the air inlet pipe 105 is used to receive an external cold air source. The air inlet 501 is connected to the air inlet pipe 105, providing a channel for cold air to enter the air inlet cylinder 500. After entering the air inlet 501, the cold air flows along the gap between the air inlet 501 and the closed cylinder 504, continues downward to the mounting frame 505, flows around the outside of the mounting frame 505 structure, passes through the circulation space below the mounting frame 505, and finally exits through the air outlet 502 on the outer wall of the air inlet cylinder 500 and enters the cold chamber 104, completing the cold air delivery process.

[0078] Magnet a506 is mounted on the outer wall of the air intake cylinder 500, and magnet b507 is mounted on the spiral connector 200, creating a magnetic attraction between the two. When the spiral connector 200 is driven axially by the cylinder 204, the magnetic attraction of magnet b507 drives magnet a506 to move synchronously, thereby causing the air intake cylinder 500 to slide within the air intake pipe 105.

[0079] When the spiral connecting frame 200 moves downward, the magnet b507 drives the air intake cylinder 500 to move downward. After the air inlet 501 on the air intake cylinder 500 moves to the position of the closed cylinder 504, the air inlet 501 can be installed with the closed cylinder 504, and the air inlet 501 can slide along the outer wall of the closed cylinder 504. At this time, the communication path between the air inlet 501 and the air intake pipe 105 is closed.

[0080] Through the above state, the air inlet 501 is completely blocked by the closing tube 504, and the air inlet pipe 105 is effectively closed, which can prevent the high-pressure cold air generated in the space inside the cold chamber 104 during the compression process from rushing back to the air inlet pipe 105, and avoid the cold air from flowing out of the air inlet pipe 105 during the compression process, ensuring that the cold air flow is concentrated and sprayed to the cold air nozzle 106, thereby increasing the airflow injection speed.

[0081] In this embodiment, a spring d508 is connected between the magnet a506 and the air intake pipe 105. One end of the spring d508 is connected to the magnet a506 on the air intake cylinder 500, and the other end is fixed to the bottom of the air intake pipe 105, for providing a restoring elastic force to the air intake cylinder 500.

[0082] Through the above setting, the cylinder 204 drives the spiral connecting frame 200 to move axially, and the magnet b507 on the spiral connecting frame 200 drives the magnet a506 on the air intake cylinder 500 to move synchronously through magnetic attraction. The air intake cylinder 500 slides in the air intake pipe 105, and the spring d508 is stretched to generate potential energy. The air inlet 501 is gradually fitted with the closing cylinder 504 to block the outflow of gas.

[0083] As the cold air nozzle 106 moves gradually under the drive of the cylinder 204, the spiral connecting frame 200 and the connecting rod a201, the cold air nozzle 106 approaches the spiral track 102 and rotates to a preset angle under the further drive of the disturbance component, causing high-speed cold air blowing disturbance to the food. When the spiral connecting frame 200 and the connecting rod a201 are about to move down to the limit position, the sliding port 503 on the air intake cylinder 500 slides along the mounting frame 505 to the limit position of the stroke, and the sliding movement of the air intake cylinder 500 is restricted, and it cannot continue to move synchronously with the spiral connecting frame 200.

[0084] As the spiral connector 200 continues to move, the magnetic connection between magnet b507 and magnet a506 is disconnected, and magnet a506 is no longer driven by the spiral connector 200. At this point, spring d508 releases its elastic potential energy, rapidly driving the air intake cylinder 500 back along the air intake pipe 105. Once the air intake cylinder 500 returns to its original position, the air intake path is fully opened again, allowing cold air to fully replenish the cold chamber 104, ensuring a timely and stable airflow supply.

[0085] After adjusting the state of the cold air nozzle 106 and disturbing the airflow over the food, the cylinder 204 drives the spiral connecting frame 200 to reset, returning the cold air nozzle 106 to its original position, and gradually restoring the compressed space within the cold chamber 104. The air intake cylinder 500 is promptly reset and the air intake path is quickly opened when the airflow disturbance is about to end. This effectively supports the recovery process of the cold chamber 104, replenishing cold air in time during the recovery phase and ensuring the continuity of the cold air supply.

[0086] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A double spiral quick freezing device for food freezing, characterized in that: include: A freezing box (100), wherein two sleeves (101) are provided in the freezing box (100); A spiral track (102) is provided on one side of the freezing box (100), wherein a surrounding mesh belt (103) is provided on the spiral track (102), and the mesh belt (103) is continuously arranged along the spiral track (102); A cold chamber (104) is provided in the sleeve (101), and the cold chamber (104) is connected to an air inlet pipe (105); A plurality of cold air nozzles (106) are arranged on the outer wall of the sleeve (101) and face the spiral track (102). The cold air nozzles (106) surround the outer wall of the sleeve (101) and are arranged in layers and staggered positions along the height direction of the spiral track (102); A pipe provided on the cold air nozzle (106), one end of which extends into the cold chamber (104) and is used to connect the cold air nozzle (106) and the cold chamber (104); A driving component provided between the freezing box (100) and the mesh belt (103), for driving the mesh belt (103) to perform continuous conveying motion along the spiral track (102); A disturbance component provided between the sleeve (101) and the cold chamber (104) is used to synchronously drive the plurality of cold air nozzles (106) to move into the conveying channel on the spiral track (102), and to drive the cold air nozzles (106) to rotate when they move to a predetermined position.

2. A double spiral quick freezing device for food freezing according to claim 1, characterized in that: The driving component includes a support frame (107) connected to both sides of the freezing box (100), and a plurality of conveying shafts (108) are rotatably connected to the support frame (107). The mesh belt (103) passes around the plurality of conveying shafts (108), and a motor (109) is connected to one of the support frames (107), and the driving shaft of the motor (109) is connected to one of the conveying shafts (108).

3. A double spiral quick freezing device for food freezing according to claim 1, characterized in that: The disturbance component includes a spiral connecting frame (200) arranged between the sleeve (101) and the cold chamber (104), a plurality of connecting rods a (201) are connected to the spiral connecting frame (200), a plurality of cold air nozzles (106) are connected to the corresponding connecting rods a (201), an outer wall of the cold chamber (104) is provided with a plurality of avoidance openings a (202), an upper portion of the spiral connecting frame (200) passes through the avoidance openings a (202) and extends into the cold chamber (104), a baffle (203) covering the avoidance openings a (202) is connected to the spiral connecting frame (200) to prevent cold air from overflowing from the avoidance openings a (202), a cylinder (204) is connected to the sleeve (101), and a telescopic shaft of the cylinder (204) extends into the interior of the cold chamber (104) and is connected to the spiral connecting frame (200).

4. A double spiral quick freezing device for food freezing according to claim 3, characterized in that: The pipeline includes a hose (205) connected to the cold air nozzle (106), a hard pipe (206) is connected to the cold cavity (104), the hard pipe (206) passes through the cold cavity (104) and the sleeve, and is connected to the hose (205), and an avoidance opening b (207) for avoiding the hard pipe (206) is opened on the spiral connecting frame (200).

5. A double spiral quick freezing device for food freezing according to claim 3, characterized in that: The disturbance component further comprises a slide rail (300) connected to the cold air nozzle (106), a slider a (301) being slidably connected in the slide rail (300), the connecting rod a (201) being rotatably connected in the slider a (301), a slide groove (302) being provided on the outer wall of the sleeve (101), a slider b (303) being slidably connected in the slide groove (302), and a connecting rod b (304) being rotatably connected to the slider b (303) being connected to the cold air nozzle (106); The slide rail (300) is provided with a plurality of wedge-shaped openings (305), the slider a (301) is slidably connected to a wedge-shaped strip (306) that cooperates with the wedge-shaped openings (305), and a spring a (307) is connected between the wedge-shaped strip (306) and the slider a (301); The inner wall of the slider b (303) is provided with a plurality of damping openings (308), wherein the damping openings (308) are semicircular openings. A damping rod (309) cooperating with the damping openings (308) is slidably connected to the connecting rod b (304), and a spring b (310) is connected between the damping rod (309) and the connecting rod b (304).

6. A double spiral quick freezing device for food freezing according to claim 3, characterized in that: When the disturbance component moves and rotates the cold air nozzle (106), it can gradually compress the space in the cold chamber (104) to accelerate the speed of the cold air passing through the pipeline; The cold chamber (104) is connected to an adjustment cylinder (400), and a plurality of compression chambers (401) are provided on the outer wall of the adjustment cylinder (400). A push plate (402) is slidably connected to the compression chamber (401), and extension plates (403) are slidably connected to both sides of the push plate (402). A spring c (404) is connected between the extension plate (403) and the push plate (402). A connecting shaft (405) is connected to the spiral connecting frame (200), and the connecting shaft (405) extends to the interior of the adjustment cylinder (400) and is rotatably connected to a plurality of connecting rods c (406). The other end of the connecting rod c (406) is rotatably connected to the push plate (402).

7. A double spiral quick freezing device for food freezing according to claim 3, characterized in that: The disturbance component is capable of closing the air inlet pipe (105) when the cold air nozzle (106) is moved to a preset position, and opening the air inlet pipe (105) when the cold air nozzle (106) is rotated to a preset angle; An air intake cylinder (500) is slidably connected inside the air intake pipe (105), and an air intake port (501), an air outlet port (502) and a sliding port (503) are respectively provided on the top and the outer wall of the air intake cylinder (500). A closed cylinder (504) is connected to the inner wall of the air intake pipe (105), which is located inside the air intake cylinder (500) and below the air intake port (501). A mounting frame (505) is connected to the closed cylinder (504), and the mounting frame (505) is connected to the air intake pipe (105) through the sliding port (503). A magnet a (506) is connected to the air intake cylinder (500), and a magnet b (507) that is magnetically attracted to the magnet a (506) is connected to the spiral connecting frame (200).

8. A double spiral quick freezing device for food freezing according to claim 7, characterized in that: A spring d (508) is connected between the magnet a (506) and the air intake pipe (105).

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