Processing device for freeze-dried food production

Abstract

The invention relates to the technical field of freeze-dried food processing, in particular to a processing device for freeze-dried food production. Comprising a processing tank, a discharging pipe, a feeding mechanism and a liquid nitrogen injection mechanism, the liquid nitrogen injection mechanism comprises a bearing plate, an extrusion block is arranged on one side of the bearing plate, and the extrusion block is movably attached to the inner wall of the processing tank; the extrusion block is made of a heat insulation material, a plurality of groups of liquid nitrogen flow guide pipes are mounted in the extrusion block in an embedded manner, liquid nitrogen is injected into the processing tank through a liquid nitrogen injection mechanism, sliced freeze-dried food raw materials are subjected to liquid nitrogen quick freezing, after quick freezing is completed, a valve on a discharging pipe is opened, and the liquid nitrogen is discharged; freeze-dried food slices are led out through the discharging pipe and enter the drying box to be further processed through air flow generated by injecting liquid nitrogen, slicing and quick freezing of freeze-dried food raw materials are both carried out in the same processing tank, the processing efficiency of the freeze-dried food is improved, and meanwhile loss and pollution generated in the transfer process of the freeze-dried food are avoided.

Description

Technical Field

[0001] This invention belongs to the field of freeze-dried food processing technology, and specifically relates to a processing device for freeze-dried food production. Background Technology

[0002] In the traditional freeze-dried food processing industry, the production process typically involves multiple independent steps, such as raw material pretreatment, slicing, quick-freezing, and freeze-drying, with each step completed in different pieces of equipment. This segmented processing model has significant drawbacks:

[0003] First, raw materials must be manually transferred to quick-freezing equipment after slicing, which is not only inefficient but also prone to microbial contamination or nutrient loss due to exposure to ambient temperature. Second, conventional slicing equipment cannot flexibly adjust thickness, and the blades easily adhere to raw material residue, affecting the quality of subsequent batches. Third, the liquid nitrogen quick-freezing process often uses open spraying, resulting in low refrigerant utilization and resource waste. Furthermore, existing equipment generally lacks self-cleaning capabilities, causing processing residues to accumulate on the equipment's inner walls and blades, increasing the risk of cross-contamination and requiring frequent shutdowns for cleaning, severely impacting continuous production capacity. The industry urgently needs an intelligent processing device that integrates slicing, quick-freezing, and cleaning functions to address the three core pain points of efficiency, hygiene, and energy consumption.

[0004] A search revealed that in the prior art, patent document CN219359601U, published on July 18, 2023, discloses a slicing device for freeze-dried fruit production and processing. This device includes a fixed frame, a housing, a slicing assembly, a pushing assembly, and a discharging assembly. The fixed frame has a placement groove, and the housing is fixedly connected to one end of the fixed frame. A through hole is provided on the side wall of the housing corresponding to the placement groove, and a discharge port is provided at the bottom of the housing. The slicing assembly is disposed inside the housing for slicing the fruit. The pushing assembly is disposed inside the placement groove for pushing the fruit into the housing. The discharging assembly is disposed above the fixed frame for conveying the fruit into the placement groove. In this invention, after the fruit is placed on the placement groove, the operation of a first motor and a second motor continuously pushes the fruit into the housing via a pushing plate. Then, the rotating cutting blade and rotating plate continuously slice the fruit into pieces, thus improving slicing efficiency.

[0005] However, the device still has the following drawbacks: although it can improve the efficiency of slicing, the fruit raw materials need to be manually transferred to the quick-freezing equipment after slicing, which is not only inefficient, but also prone to microbial contamination or loss of nutrients due to exposure to room temperature environment. Summary of the Invention

[0006] To address the above problems, the present invention provides a processing apparatus for freeze-dried food production, including a processing tank, a feeding pipe, a feeding mechanism, and a liquid nitrogen injection mechanism. The liquid nitrogen injection mechanism includes a support plate, and an extrusion block is provided on one side of the support plate. The extrusion block is movably fitted against the inner wall of the processing tank.

[0007] The extrusion block is made of heat-insulating material. Several sets of liquid nitrogen guide pipes are embedded inside the extrusion block. Several sets of liquid nitrogen nozzles for spraying liquid nitrogen into the processing tank are installed on one side of the extrusion block. The output ends of the several sets of liquid nitrogen nozzles extend into the processing tank.

[0008] Both ends of the processing tank are provided with a cover, and the cover includes a central plate, an annular plate and several sets of connecting plates.

[0009] A second motor is installed on a set of central plates, and a slicing mechanism for uniformly slicing freeze-dried food raw materials is provided inside the processing tank. The output end of the second motor is connected to the slicing mechanism for transmission.

[0010] The feeding mechanism includes a feeding box, on which an electric cylinder is installed on the side wall away from the processing tank. The output end of the electric cylinder is connected to an arc-shaped pusher plate for pushing the freeze-dried food raw materials.

[0011] Furthermore, one end of the processing tank is connected to the feeding pipe, a valve is installed inside the feeding pipe, the discharge end of the feeding pipe is connected to a drying box, the other end of the processing tank is connected to the liquid nitrogen injection mechanism, the feeding mechanism is located on one side of the processing tank, and the feeding mechanism is connected to the interior of the processing tank.

[0012] Furthermore, the input ends of several sets of liquid nitrogen nozzles are respectively connected to a corresponding set of liquid nitrogen guide pipes. The other end of the support plate is provided with a liquid nitrogen injection pipe, which is equipped with a solenoid valve. The output end of the liquid nitrogen injection pipe is connected to the input ends of several sets of liquid nitrogen guide pipes. The input end of the liquid nitrogen injection pipe is connected to a liquid nitrogen storage tank, which stores liquid nitrogen.

[0013] Furthermore, a platform is provided at the bottom of the processing tank, and a reciprocating moving mechanism is provided on one side of the platform. The reciprocating moving mechanism includes an L-shaped bracket, on which a first motor is mounted. The output end of the first motor is driven by a threaded rod, which is rotatably connected between the L-shaped bracket and the platform. A slider is threadedly connected to the threaded rod. A limiting shaft is fixedly connected between the L-shaped bracket and the platform. The limiting shaft passes through the slider and is in movable contact with the slider. The top end of the slider is fixedly connected to a support plate.

[0014] Furthermore, several sets of connecting plates are arranged in a circular array around the central axis of the central plate, and the several sets of connecting plates are fixedly connected between the central plate and the annular plate. Several sets of matching grooves are provided on the extrusion block, and the inner walls of the several sets of matching grooves are respectively in contact with the corresponding set of connecting plates.

[0015] Furthermore, a through groove is provided on one side of the processing tank, one end of the feeding box is adapted to the through groove, a feeding slot is provided at the top of the feeding box, a flip cover is provided on the feeding slot, the arc-shaped push plate is movably fitted with the inner wall of the feeding box, and the arc-shaped push plate is movably engaged with the through groove.

[0016] Furthermore, the slicing mechanism includes a central shaft, which is rotatably connected between two sets of central plates. One end of the central shaft is connected to the output end of a second motor, and several sets of mounting blocks are arranged in a circular array on the central shaft.

[0017] Furthermore, the mounting block is provided with a clearance groove, and a rotating blade holder is rotatably connected to the inner wall of the clearance groove, and a cutting blade is mounted on the rotating blade holder.

[0018] Furthermore, a second transmission groove is provided on one side of the mounting block, and a linkage part is provided in the second transmission groove. The linkage part includes a driving pulley, a driven pulley and a synchronous belt. The synchronous belt is sleeved on the driving pulley and the driven pulley. The driven pulley is fixedly connected to the center of one end of the rotating tool holder. The driving pulley is installed in the internal cavity of the central shaft. Several sets of first transmission grooves are provided on the central shaft, and the several sets of first transmission grooves correspond one-to-one with several sets of linkage parts.

[0019] Furthermore, a fixed plate is provided inside the cavity of the central shaft. A third motor is installed at the center of one side of the fixed plate, and a drive gear is rotatably connected to the other side of the fixed plate. The center of the drive gear is connected to the output end of the third motor. Several sets of driven gears are meshed on the drive gear. A linkage shaft is fixedly connected to the center of each set of driven gears. The other end of each set of linkage shafts is fixedly connected to the center of a corresponding set of drive pulleys.

[0020] The beneficial effects of this invention are:

[0021] 1. The freeze-dried food raw materials to be processed are fed into the processing tank through the feeding mechanism for slicing. After slicing, liquid nitrogen is injected into the processing tank through the liquid nitrogen injection mechanism to quick-freeze the sliced ​​freeze-dried food raw materials. After quick-freezing, the valve on the discharge pipe is opened, and the airflow generated by the injected liquid nitrogen pushes the freeze-dried food slices out through the discharge pipe and into the drying chamber for further processing. This allows the slicing and quick-freezing of freeze-dried food to be carried out in the same processing tank, improving the processing efficiency of freeze-dried food while avoiding loss and contamination during the transfer of freeze-dried food.

[0022] 2. An electric cylinder drives an arc-shaped pusher plate to move towards the processing tank, allowing the freeze-dried food raw materials to enter the processing tank through a trough for slicing. The feeding speed of the freeze-dried food raw materials can be adjusted by regulating the extension speed of the output end of the electric cylinder. When the arc-shaped pusher plate moves to the trough, it can cover the trough, creating a sealed space inside the processing tank. At this time, injecting liquid nitrogen into the processing tank can effectively prevent liquid nitrogen from escaping, thereby effectively improving the quick-freezing effect.

[0023] 3. The third motor drives the drive gear to rotate, which in turn drives several sets of driven gears to drive several sets of drive pulleys to rotate synchronously. This causes the driven pulleys to drive several sets of rotating blade holders to rotate synchronously, bringing the cutting blades to the positions shown in the figure. At this point, the second motor drives the central shaft to rotate, which in turn drives the cutting blades to rotate synchronously, performing continuous slicing of the freeze-dried food raw materials pushed into the processing tank. By adjusting the speed of the second motor and the speed at which the arc-shaped pusher pushes the freeze-dried food raw materials, the thickness of the slices can be adjusted, thereby effectively improving the versatility of the device.

[0024] 4. By storing the cutting blades, the repeated cutting of freeze-dried food slices by the cutting blades can be effectively avoided, which would cause the slices to break. After the quick-freezing operation is completed, the extrusion block enters the processing tank, allowing the matching groove to fit against the inner wall of the processing tank and the surface of several sets of mounting blocks. This scrapes off the freeze-dried food slices adhering to the inner wall of the processing tank and the surface of several sets of mounting blocks. The extrusion block pushes the freeze-dried food slices in the processing tank into the feeding pipe, and they enter the feeding pipe with the liquid nitrogen gas flow from the liquid nitrogen nozzle, improving the fullness of feeding and allowing the processed freeze-dried food slices to be fully discharged without the need for manual shutdown to clean the processing tank. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the main structure according to an embodiment of the present invention is shown;

[0027] Figure 2 A schematic diagram of the liquid nitrogen injection mechanism and the internal structure of the processing tank according to an embodiment of the present invention is shown;

[0028] Figure 3 A cross-sectional view of the feeding mechanism and the internal structure of the processing tank according to an embodiment of the present invention is shown;

[0029] Figure 4 A schematic diagram of the slicing mechanism according to an embodiment of the present invention in the state of the cutting blade unfolded is shown;

[0030] Figure 5 A cross-sectional view of the central axis and the internal structure of the mounting block according to an embodiment of the present invention is shown;

[0031] Figure 6 A sectional view of the internal structure of the central axis according to an embodiment of the present invention is shown.

[0032] Figure 7 An embodiment of the present invention is shown. Figure 6 Enlarged view of point A in the middle;

[0033] Figure 8 A schematic diagram of the slicing mechanism according to an embodiment of the present invention is shown in the state of the cutting blade being stored.

[0034] In the diagram: 100, processing tank; 110, cover; 111, center plate; 112, annular plate; 113, connecting plate; 114, second motor; 120, through slot; 130, platform; 200, feeding pipe; 300, feeding mechanism; 310, feeding box; 320, feeding trough; 330, flip cover; 340, electric cylinder; 350, arc-shaped push plate; 400, liquid nitrogen injection mechanism; 410, bearing plate; 420, extrusion block; 421, matching groove; 430, liquid nitrogen injection pipe; 440, liquid nitrogen nozzle; 500, reciprocating movement mechanism; 510, L-shaped bracket; 520, first motor; 530, threaded rod; 540, slider; 550, limiting shaft; 600, slicing mechanism; 610, central shaft; 611, first transmission groove; 612, fixing plate; 613, third motor; 614, driving gear; 615, driven gear; 616, linkage shaft; 620, mounting block; 621, second transmission groove; 630, clearance groove; 640, rotating blade holder; 650, cutting blade; 660, linkage part; 661, driving pulley; 662, driven pulley; 663, synchronous belt. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This invention provides a processing apparatus for freeze-dried food production, including a processing tank 100, a feeding pipe 200, a feeding mechanism 300, and a liquid nitrogen injection mechanism 400; for example, Figures 1-3 As shown.

[0037] One end of the processing tank 100 is connected to the discharge pipe 200, and a valve is installed inside the discharge pipe 200. The discharge end of the discharge pipe 200 is connected to a drying box. The other end of the processing tank 100 is connected to the liquid nitrogen injection mechanism 400. The feeding mechanism 300 is located on one side of the processing tank 100 and is connected to the interior of the processing tank 100.

[0038] Specifically, the freeze-dried food raw materials to be processed are fed into the processing tank 100 through the feeding mechanism 300 for slicing. After slicing, liquid nitrogen is injected into the processing tank 100 through the liquid nitrogen injection mechanism 400 to quick-freeze the sliced ​​freeze-dried food raw materials. After quick-freezing, the valve on the discharge pipe 200 is opened, and the airflow generated by the injected liquid nitrogen carries the freeze-dried food slices out through the discharge pipe 200 and into the drying chamber for further processing. This allows the slicing and quick-freezing of the freeze-dried food to be carried out in the same processing tank 100, improving the processing efficiency of freeze-dried food while avoiding losses and contamination during the transfer of freeze-dried food.

[0039] The liquid nitrogen injection mechanism 400 includes a support plate 410. A squeezing block 420 is provided on one side of the support plate 410. The squeezing block 420 is movably fitted to the inner wall of the processing tank 100. The squeezing block 420 is made of heat-insulating material. Several sets of liquid nitrogen guide pipes are embedded inside the squeezing block 420. Several sets of liquid nitrogen nozzles 440 are installed on one side of the squeezing block 420. The output ends of the several sets of liquid nitrogen nozzles 440 extend into the processing tank 100. The input ends of the several sets of liquid nitrogen nozzles 440 are respectively connected to a corresponding set of liquid nitrogen guide pipes. A liquid nitrogen injection pipe 430 is provided at the other end of the support plate 410. A solenoid valve is provided on the liquid nitrogen injection pipe 430. The output end of the liquid nitrogen injection pipe 430 is connected to the input ends of the several sets of liquid nitrogen guide pipes. The input end of the liquid nitrogen injection pipe 430 is connected to a liquid nitrogen storage tank. The liquid nitrogen storage tank stores liquid nitrogen.

[0040] Specifically, by opening the solenoid valve on the liquid nitrogen injection pipe 430, liquid nitrogen enters several sets of liquid nitrogen guide pipes and is sprayed into the processing tank 100 through several sets of liquid nitrogen nozzles 440 to perform a quick-freezing operation on the freeze-dried food slices inside. By embedding several sets of liquid nitrogen guide pipes into the extrusion block 420, the liquid nitrogen guide pipes are insulated to prevent the temperature of the liquid nitrogen from rising during transportation and affecting the quick-freezing effect.

[0041] The bottom end of the processing tank 100 is provided with a platform 130, and a reciprocating moving mechanism 500 is provided on one side of the platform 130. The reciprocating moving mechanism 500 includes an L-shaped bracket 510, on which a first motor 520 is mounted. The output end of the first motor 520 is drivenly connected to a threaded rod 530. The threaded rod 530 is rotatably connected between the L-shaped bracket 510 and the platform 130. A slider 540 is threadedly connected to the threaded rod 530. A limiting shaft 550 is fixedly connected between the L-shaped bracket 510 and the platform 130. The limiting shaft 550 passes through the slider 540 and is movably fitted with the slider 540. The top end of the slider 540 is fixedly connected to a support plate 410.

[0042] Both ends of the processing tank 100 are provided with a cover 110. The cover 110 includes a central plate 111, an annular plate 112 and several sets of connecting plates 113. The several sets of connecting plates 113 are arranged in a circular array with the central axis of the central plate 111 as the center. The several sets of connecting plates 113 are fixedly connected between the central plate 111 and the annular plate 112. Several sets of matching grooves 421 are opened on the extrusion block 420. The inner wall of the several sets of matching grooves 421 is respectively in contact with the corresponding set of connecting plates 113. A second motor 114 is installed on one set of central plates 111. The second motor 114 is provided with a protective cover. A slicing mechanism 600 is provided inside the processing tank 100. The output end of the second motor 114 is connected to the slicing mechanism 600.

[0043] Specifically, the second motor 114 drives the slicing mechanism 600 to rotate, thereby slicing the freeze-dried food raw materials. The thickness of the slices can be adjusted by regulating the speed of the second motor 114. After slicing, the freeze-dried food remains inside the processing tank 100. The first motor 520 drives the threaded rod 530 to rotate, which in turn moves the slider 540. This causes the bearing plate 410 to move the extrusion block 420 toward the processing tank 100, thus pushing the freeze-dried food slices inside the processing tank 100 into the feeding pipe 200. Combined with the airflow generated by the liquid nitrogen sprayed from the liquid nitrogen nozzle 440, the processed freeze-dried food can be fully discharged without the need for manual cleaning of the processing tank 100.

[0044] The processing tank 100 has a through groove 120 on one side. The feeding mechanism 300 includes a feeding box 310. One end of the feeding box 310 is adapted to the through groove 120. The top of the feeding box 310 has a feeding slot 320. A flip cover 330 is provided on the feeding slot 320. An electric cylinder 340 is installed on the side wall of the feeding box 310 away from the processing tank 100. The output end of the electric cylinder 340 is connected to an arc-shaped push plate 350. The arc-shaped push plate 350 is movably fitted with the inner wall of the feeding box 310, and the arc-shaped push plate 350 is movably engaged with the through groove 120.

[0045] Specifically, by opening the flip cover 330, the freeze-dried food raw materials to be processed are placed into the feeding box 310 through the feeding trough 320. The electric cylinder 340 drives the arc-shaped pusher plate 350 to move towards the processing tank 100, so that the freeze-dried food raw materials enter the processing tank 100 through the through groove 120 for slicing. When the arc-shaped pusher plate 350 moves to the through groove 120, it can cover the through groove 120, so that the processing tank 100 forms a sealed space. At this time, liquid nitrogen is injected into the processing tank 100 to effectively prevent liquid nitrogen from escaping, thereby effectively improving the quick-freezing effect.

[0046] For example, such as Figures 4-8 As shown.

[0047] The slicing mechanism 600 includes a central shaft 610, which is rotatably connected between two sets of central plates 111. One end of the central shaft 610 is connected to the output end of the second motor 114. Several sets of mounting blocks 620 are arranged in a circular array on the central shaft 610. The sets of mounting blocks 620 are respectively movably fitted with several sets of matching grooves 421. The mounting blocks 620 are provided with clearance grooves 630. A rotating blade holder 640 is rotatably connected to the inner wall of the clearance groove 630. A cutting blade 650 is installed on the rotating blade holder 640.

[0048] A second transmission groove 621 is provided on one side of the mounting block 620. A linkage part 660 is provided in the second transmission groove 621. The linkage part 660 includes a driving pulley 661, a driven pulley 662 and a synchronous belt 663. The synchronous belt 663 is sleeved on the driving pulley 661 and the driven pulley 662. The driven pulley 662 is fixedly connected to the center of one end of the rotating tool holder 640. The driving pulley 661 is installed in the cavity inside the central shaft 610. A plurality of first transmission grooves 611 are provided on the central shaft 610. The plurality of first transmission grooves 611 correspond one-to-one with the plurality of linkage parts 660.

[0049] A fixing plate 612 is provided inside the cavity of the central shaft 610. A third motor 613 is installed at the center of one side of the fixing plate 612. A drive gear 614 is rotatably connected to the other side of the fixing plate 612. The center of the drive gear 614 is connected to the output end of the third motor 613. Several sets of driven gears 615 are meshed on the drive gear 614. A linkage shaft 616 is fixedly connected to the center of each set of driven gears 615. The other end of each set of linkage shafts 616 is fixedly connected to the center of a corresponding set of drive pulleys 661.

[0050] Specifically, the third motor 613 drives the drive gear 614 to rotate, causing several sets of driven gears 615 to drive several sets of drive pulleys 661 to rotate synchronously. This, in turn, causes several sets of driven pulleys 662 to drive several sets of rotating tool holders 640 to rotate synchronously, resulting in several sets of cutting blades 650 rotating to the desired position. Figure 4 At the position shown, the second motor 114 drives the central shaft 610 to rotate, which can drive several sets of cutting blades 650 to rotate synchronously, continuously slicing the freeze-dried food raw materials pushed into the processing tank 100. After slicing, the freeze-dried food is placed in the space between the two adjacent sets of mounting blocks 620 and the inner wall of the processing tank 100.

[0051] Furthermore, after the slicing operation is completed, the third motor 613 drives the drive gear 614 to rotate in the opposite direction, causing several sets of cutting blades 650 to rotate in the opposite direction synchronously. At this time, the positions of the cutting blades 650 are as follows: Figure 8 As shown, this allows for the storage of several sets of cutting blades 650. At this time, the second motor 114 drives the slicing mechanism 600 to rotate, which can continuously rotate the freeze-dried food slices, so that the freeze-dried food slices can fully contact the liquid nitrogen, improving the quick-freezing effect. Furthermore, storing the cutting blades 650 can effectively prevent the slices from breaking due to repeated cutting by the cutting blades. After the quick-freezing operation is completed, the extrusion block 420 enters the processing tank 100, which allows the matching groove 421 to adhere to the inner wall of the processing tank 100 and the surface of several sets of mounting blocks 620, thereby scraping off the freeze-dried food slices adhering to the inner wall of the processing tank 100 and the surface of several sets of mounting blocks 620. The slices then enter the feeding pipe 200 with the liquid nitrogen gas flow sprayed from the liquid nitrogen nozzle 440, improving the fullness of feeding and achieving a self-cleaning effect for the processing tank 100 and the slicing mechanism 600.

[0052] The working principle of the freeze-dried food production processing apparatus proposed in this invention is as follows:

[0053] By opening the flip cover 330, the freeze-dried food raw materials to be processed are placed into the feeding box 310 through the feeding trough 320. The electric cylinder 340 drives the arc-shaped pusher plate 350 to move towards the processing tank 100, so that the freeze-dried food raw materials enter the processing tank 100 through the through groove 120 for slicing. The feeding speed of the freeze-dried food raw materials can be adjusted by adjusting the extension speed of the output end of the electric cylinder 340. When the arc-shaped pusher plate 350 moves to the through groove 120, it can cover the through groove 120, so that a sealed space is formed inside the processing tank 100. At this time, liquid nitrogen is injected into the processing tank 100 to effectively prevent liquid nitrogen from escaping, thereby effectively improving the quick-freezing effect.

[0054] The third motor 613 drives the drive gear 614 to rotate, causing several sets of driven gears 615 to drive several sets of drive pulleys 661 to rotate synchronously. This, in turn, causes several sets of driven pulleys 662 to drive several sets of rotating tool holders 640 to rotate synchronously, resulting in several sets of cutting blades 650 rotating to... Figure 4 At the position shown, the second motor 114 drives the central shaft 610 to rotate, which in turn drives several sets of cutting blades 650 to rotate synchronously, performing continuous slicing of the freeze-dried food raw materials pushed into the processing tank 100. By adjusting the speed of the second motor 114, combined with the speed of the arc-shaped pusher plate 350 pushing the freeze-dried food raw materials, the thickness of the freeze-dried food raw material slices can be adjusted.

[0055] After slicing, the freeze-dried food slices remain in the space between two adjacent sets of mounting blocks 620 and the inner wall of the processing tank 100. After the slicing operation is complete, the third motor 613 drives the drive gear 614 to rotate in the opposite direction, causing several sets of cutting blades 650 to rotate synchronously in the opposite direction. At this time, the positions of the cutting blades 650 are as follows: Figure 8 As shown, this allows for the storage of several sets of cutting blades 650.

[0056] By opening the solenoid valve on the liquid nitrogen injection pipe 430, liquid nitrogen enters several sets of liquid nitrogen guide pipes and is sprayed into the processing tank 100 through several sets of liquid nitrogen nozzles 440 to perform a quick-freezing operation on the freeze-dried food slices inside. By embedding several sets of liquid nitrogen guide pipes into the extrusion block 420, the liquid nitrogen guide pipes are insulated to prevent the temperature of the liquid nitrogen from rising during transportation and affecting the quick-freezing effect.

[0057] At this time, the second motor 114 drives the slicing mechanism 600 to rotate, which can drive the freeze-dried food slices to rotate continuously, so that the freeze-dried food slices can come into full contact with liquid nitrogen and improve the quick-freezing effect.

[0058] After quick-freezing is completed, the valve on the feed pipe 200 is opened, and the first motor 520 drives the threaded rod 530 to rotate, causing the threaded rod 530 to move the slider 540. This causes the bearing plate 410 to move the extrusion block 420 toward the inside of the processing tank 100. By storing the cutting blade 650, the repeated cutting of the freeze-dried food slices by the cutting blade can be effectively avoided, which would cause the slices to break. After the quick-freezing operation is completed, the extrusion block 420 enters the processing tank 100, which allows the matching groove 421 to fit against the inner wall of the processing tank 100 and the surface of several sets of mounting blocks 620, thereby scraping off the freeze-dried food slices adhering to the inner wall of the processing tank 100 and the surface of several sets of mounting blocks 620.

[0059] The extrusion block 420 pushes the freeze-dried food slices in the processing tank 100 into the feeding pipe 200, and the liquid nitrogen gas flow from the liquid nitrogen nozzle 440 enters the feeding pipe 200, improving the fullness of feeding and allowing the processed freeze-dried food slices to be fully discharged. There is no need to manually stop the machine to clean the processing tank 100. The slicing and quick-freezing of freeze-dried food are carried out in the same processing tank 100, which improves the processing efficiency of freeze-dried food and avoids the loss and contamination generated during the transfer of freeze-dried food.

[0060] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A processing device for producing a freeze-dried food product, comprising a processing tank, a discharge pipe, a feeding mechanism and a liquid nitrogen injection mechanism, characterized in that: The liquid nitrogen injection mechanism comprises a bearing plate, one side of the bearing plate is provided with a pressing block, the pressing block is movably attached to the inner wall of the processing tank; The pressing block is made of heat insulation material, a plurality of groups of liquid nitrogen flow guide pipes are embedded in the pressing block, a plurality of groups of liquid nitrogen nozzles for spraying liquid nitrogen into the processing tank are installed on one side of the pressing block, and the output ends of the plurality of groups of liquid nitrogen nozzles extend into the processing tank. Both ends of the processing tank are provided with covering parts, the covering parts comprise center plates, annular plates and a plurality of groups of connecting plates; A second motor is installed on one of the center plates, the inside of the processing tank is provided with a slicing mechanism for uniformly slicing the freeze-dried food raw materials, and the output end of the second motor is drivingly connected with the slicing mechanism. The feeding mechanism comprises a feeding box, an electric cylinder is installed on one side wall of the feeding box away from the processing tank, and the output end of the electric cylinder is drivingly connected with an arc-shaped push plate for pushing the freeze-dried food raw materials.

2. The processing apparatus for producing a freeze-dried food according to claim 1, characterized by: One end of the processing tank is in communication with a discharging pipe, a valve is arranged in the discharging pipe, a drying box is communicated with the discharging end of the discharging pipe, the other end of the processing tank is in communication with the liquid nitrogen injection mechanism, the feeding mechanism is arranged on one side of the processing tank, and the feeding mechanism and the inside of the processing tank are in communication.

3. The processing apparatus for producing a freeze-dried food according to claim 1, characterized by: The input ends of the plurality of groups of liquid nitrogen nozzles are respectively in communication with corresponding groups of liquid nitrogen flow guide pipes, the other end of the bearing plate is provided with a liquid nitrogen injection pipe, an electromagnetic valve is arranged on the liquid nitrogen injection pipe, the output end of the liquid nitrogen injection pipe is in communication with the input ends of the plurality of groups of liquid nitrogen flow guide pipes, the input end of the liquid nitrogen injection pipe is communicated with a liquid nitrogen storage tank, and the liquid nitrogen storage tank stores liquid nitrogen.

4. The processing apparatus for producing a freeze-dried food according to claim 1, characterized by: The bottom end of the processing tank is provided with a carrier, one side of the carrier is provided with a reciprocating movement mechanism, the reciprocating movement mechanism comprises an L-shaped support, a first motor is installed on the L-shaped support, the output end of the first motor is drivingly connected with a threaded rod, the threaded rod is rotatably connected between the L-shaped support and the carrier, a sliding block is threadedly connected to the threaded rod, a limiting shaft is fixedly connected between the L-shaped support and the carrier, the limiting shaft penetrates through the sliding block and movably attaches to the sliding block, and the top end of the sliding block is fixedly connected with the bearing plate.

5. The processing apparatus for producing a freeze-dried food according to claim 1, characterized by A plurality of groups of connecting plates are arranged in a ring array around the central axis of the center plate, a plurality of groups of connecting plates are fixedly connected between the center plate and the annular plate, a plurality of groups of matching grooves are formed in the pressing block, and the inner walls of the plurality of groups of matching grooves are respectively movably attached to corresponding groups of connecting plates.

6. The processing apparatus for producing a freeze-dried food according to claim 1, characterized by: One side of the processing tank is provided with a through groove, one end of the feeding box is matched with the through groove, a feeding groove is formed in the top end of the feeding box, a cover is arranged on the feeding groove, the arc-shaped push plate movably attaches to the inner wall of the feeding box, and the arc-shaped push plate movably connects with the through groove.

7. The processing apparatus for producing a freeze-dried food according to Claim 1, characterized by: The slicing mechanism comprises a center shaft, the center shaft is rotatably connected between the two center plates, one end of the center shaft is drivingly connected with the output end of the second motor, and a plurality of groups of mounting blocks are arranged in a ring array on the center shaft.

8. The processing apparatus for producing a freeze-dried food according to claim 7, characterized by: The mounting block is provided with a letting slot, and the inner wall of the letting slot is rotationally connected with a rotary tool holder.

9. The processing apparatus for producing a freeze-dried food according to claim 7, characterized by: The mounting block is provided with a second transmission groove on one side, and the second transmission groove is provided with a linkage part. The linkage part comprises a driving pulley, a driven pulley and a synchronous belt. The synchronous belt is sleeved on the driving pulley and the driven pulley. The driven pulley is fixedly connected with the center of one end of the rotary tool holder. The driving pulley is installed in the inner cavity of the central shaft. The central shaft is provided with a plurality of groups of first transmission grooves. The plurality of groups of first transmission grooves correspond to the plurality of groups of linkage parts one by one.

10. The processing apparatus for producing a freeze-dried food according to claim 9, characterized by: The inner cavity of the central shaft is provided with a fixed plate. The center of one side of the fixed plate is provided with a third motor. The other side of the fixed plate is rotationally connected with a driving gear. The center of the driving gear is in transmission connection with the output end of the third motor. The driving gear is in meshing connection with a plurality of groups of driven gears. The center of each group of driven gears is fixedly connected with a linkage shaft. The other end of each group of linkage shafts is fixedly connected with the center of a corresponding group of driving pulleys.

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