Food-grade insect freeze-drying preparation device and preparation method thereof

Abstract

The invention relates to the technical field of freeze-drying preparation, in particular to an edible-grade insect freeze-drying preparation device and a preparation method thereof.The edible-grade insect freeze-drying preparation device comprises a box body, a conveying pipe and an outer cover pipe which are connected together in a sleeved mode are arranged in the box body, and an inner rotating pipe is arranged in the outer cover pipe and rotationally connected to the conveying pipe; a hollow pipe is rotationally connected into the inner rotating pipe, a feeding opening is formed in the conveying pipe, and a discharging pipe is arranged on the hollow pipe; the conveying pipe, the outer cover pipe and the hollow pipe are respectively communicated with an air inlet I, an air inlet II and an air inlet III; a first spiral piece and a second spiral piece are arranged at the two ends of the interior of the inner rotating pipe correspondingly, and a first cutting tool bar, a second blade and a second cutting tool bar are arranged on the hollow pipe; the method has the beneficial effects that the whole-course low-temperature treatment of food-grade insect freeze-dried materials is realized, the nutrition and flavor of food are guaranteed, pollution is prevented, the food safety standard is met, and the production of high-quality food is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of freeze-drying preparation, in particular to a freeze-drying preparation device for edible insects and a preparation method thereof. BACKGROUND

[0002] Edible insects refer to insects and their processed products that are bred and processed in a high-standard sanitary environment and are directly or indirectly used for human consumption. They are a new type of food resource with great potential, which can not only be used as high-nutrition food rich in protein, healthy fat and minerals, such as snacks, protein powder or added to staple food such as noodles and bread, but also be used in the field of medicine as a supplement of specific nutritional components or extraction of active substances. The development of edible insect products is of great significance to the expansion of human food sources and the promotion of sustainable agricultural development.

[0003] At present, the standardized production process of edible insect freeze-dried products mainly includes three stages: first, the pretreatment stage, including the selection, cleaning, and possible seasoning and pickling of live insects, aiming to ensure the hygiene of raw materials and lay the foundation for flavor; second, the core freeze-drying stage, through rapid freezing and sublimation of water in the insects in a high-vacuum environment, so as to maximize the preservation of their nutritional components and original form; and third, the post-treatment stage, in which the key step often involves crushing the freeze-dried products to obtain insect protein powder or other forms of deep-processed products that are easy to use. However, in the crushing process of post-treatment, although the texture of freeze-dried insects is extremely crisp, their inherent high oil content makes them easily generate a large amount of heat due to equipment friction and impact in the traditional mechanical crushing process, resulting in a sharp rise in local temperature. This not only causes internal oil melting and separation, leading to material adhesion, caking, and equipment blockage, which seriously affects production efficiency, but also accelerates oil oxidation and spoilage and protein denaturation, ultimately causing product flavor deterioration, color deepening, and nutrient loss, which cannot meet the production requirements of high-quality food industry. SUMMARY

[0004] The purpose of the present application is to provide a freeze-drying preparation device for edible insects and a preparation method thereof to solve the problems raised in the background art.

[0005] In order to achieve the above object, the application provides the following technical scheme: an edible insect freeze-drying device, comprising a box, a conveying pipe and an outer cover pipe sleeved together are arranged in the box, an inner rotating pipe is arranged in the outer cover pipe, and the inner rotating pipe is rotationally connected to the conveying pipe; a hollow pipe is rotationally connected to the inner rotating pipe, a feeding port is arranged on the conveying pipe, and a discharging pipe is arranged on the hollow pipe; air inlets one, two and three are respectively communicated with the conveying pipe, the outer cover pipe and the hollow pipe; helical fins one and two are respectively arranged at two ends of the inner rotating pipe, cutting rods one and two and blades two are arranged on the hollow pipe, the cutting rods one and two and the blades two are located between the helical fins one and two, and a crushed material part is formed between the helical fins one and two; and the cutting rods one and two are in communication with the hollow pipe.

[0006] Further, a box door is arranged on the box, a rotating rod is rotationally connected to the conveying pipe, a driving part one for driving the rotating rod to rotate is arranged on the box, and a driving part two for driving the hollow pipe to rotate is arranged in the box.

[0007] Further, a material conveying auger is arranged on the rotating rod, a through hole is formed in the rotating rod, a fixed base is arranged in the conveying pipe as a rotating support of the rotating rod, and an opening five in communication with the through hole is formed in the fixed base.

[0008] Further, an opening one is formed in the conveying pipe, an opening two is formed in the outer cover pipe, and a plurality of openings three are formed in the inner rotating pipe, and the openings one, two and three are in communication.

[0009] Further, the fixed base is fixedly connected to the conveying pipe through a connecting rod, an air groove in communication with the opening one is formed in the fixed base, a gas injection port opening towards the inner rotating pipe is formed in the air groove, and an air supply port is formed at one end of the hollow pipe corresponding to the fixed base, and the air supply port is in communication with the through hole through the opening five.

[0010] Further, a partition plate is arranged in the box, a collecting barrel in communication with the discharging pipe is arranged below the partition plate, and blades one are arranged on the inner rotating pipe.

[0011] Further, grooves one and two are respectively formed in the cutting rods one and two, and a crushing piece is arranged on the cutting rod one.

[0012] Further, abrasive blocks are arranged on the crushing piece, a convex part is arranged on the upper surface of the abrasive block, a resisting rod is fixedly connected to the abrasive block, and a plurality of spring groups two are arranged between the abrasive blocks and the crushing piece.

[0013] Further, the crushing piece is provided with four openings, the adjusting block matched with the resisting rod is slidably connected to the four openings, and the spring one is arranged between the adjusting block and the crushing piece.

[0014] Further, a preparation method of the edible insect freeze-drying device comprises the following steps:

[0015] S1, check the sealing and cleanliness of each part of the device, prepare the pretreated edible insect freeze-drying material, place the collection barrel under the isolation plate, and connect the air inlets one, two and three with the external cold source;

[0016] S2, start the driving part one, the rotating rod drives the material conveying auger to rotate, open the air inlet one, and pour the material into the feeding port, the cold air pre-cools and accelerates the material into the inner rotating pipe;

[0017] S3, open the air inlet two, the cold air drives the inner rotating pipe to rotate, the air outlet blows cold air to scatter and cool the material, and the spiral piece one feeds the material to the crushing part;

[0018] S4, start the driving part two, the hollow pipe drives the cutting part to rotate and crush the material, open the air inlet three to cool the cutting part, and dynamically adjust the cold air volume when the material is too much;

[0019] S5, the crushed material enters the collection barrel through the spiral piece two and the discharge pipe, and the material is taken out after the machine is stopped and sealed, and the device parts are cleaned.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] 1, through the multi-dimensional cold air system and the dynamic temperature control structure, the present application realizes the whole process low-temperature treatment of the material from feeding to collection, effectively avoids the problems of oil oxidation rancidity and protein denaturation caused by friction heat in traditional crushing, maximizes the retention of core nutritional ingredients such as high protein, unsaturated fatty acids and minerals of edible insects, prevents food color deepening and flavor deterioration, and ensures that the final product meets the nutritional and sensory standards of high-quality food industry, providing high-quality raw materials for deep processing products such as insect protein powder and insect snacks.

[0022] 2, the parts in contact with the material in the present application are made of food-grade materials, the structure design has no dead angle and is easy to clean, which avoids material residue and microbial growth and blocks the risk of food contamination from the source; the design of the cold air driven inner rotating pipe replaces the traditional motor direct drive, reduces the contact pollution of transmission parts and materials, and the dynamic temperature control structure can prevent material adhesion and blockage of the equipment, ensure continuous and stable production, reduce the cleaning frequency of the machine, meet the needs of food industry scale production, and provide safety protection for the standardized processing of edible insect freeze-dried products. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1Structure diagram of the whole structure of the present application Figure 1 ;

[0024] Figure 2 Structure diagram of the inside of the box of the present application

[0025] Figure 3 Sectional view of the part of the conveying pipe and the cover pipe of the present application

[0026] Figure 4 Structure diagram of the part A of the present application Figure 3

[0027] Figure 5 Structure diagram of the part B of the present application Figure 4

[0028] Structure diagram of the part C of the present application Figure 6

[0029] Sectional view of the conveying pipe of the present application Figure 7

[0030] Structure diagram of the part C of the present application Figure 8 Figure 7

[0031] Figure 9 Sectional view of the crushing piece of the present application

[0032] In the drawings, the components represented by the respective reference numerals are listed as follows: 1, box; 2, box door; 3, feeding port; 4, driving part one; 5, collecting barrel; 6, isolation plate; 7, conveying pipe; 701, opening one; 8, cover pipe; 801, opening two; 9, discharging pipe; 10, air inlet one; 11, air inlet two; 12, air inlet three; 13, driving part two; 14, rotating rod; 15, material conveying auger; 16, through hole; 17, inner rotating pipe; 1701, opening three; 18, blade one; 19, helical blade one; 20, helical blade two; 21, crushing part; 22, hollow pipe; 23, cutting knife bar one; 2301, slot one; 24, blade two; 25, cutting knife bar two; 2501, slot two; 26, crushing piece; 2601, opening four; 27, abrasive block; 2701, protruding part; 28, adjusting block; 29, abutting rod; 30, spring one; 31, spring two; 32, fixed base; 3201, opening five; 33, connecting rod; 34, air groove; 35, air supply port; 36, air jet port. DETAILED DESCRIPTION

[0033] ​​​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, and 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.

[0034] This invention provides a technical solution: such as Figures 1-9 The apparatus shown is for preparing freeze-dried edible insects, including a housing 1. Inside the housing 1 are a conveying pipe 7 and an outer cover pipe 8, which are nested together. An inner rotating pipe 17 is located inside the outer cover pipe 8 and is rotatably connected to the conveying pipe 7. A hollow pipe 22 is rotatably connected inside the inner rotating pipe 17. The conveying pipe 7 has a feeding port 3, and the hollow pipe 22 has a discharging pipe 9. Air inlets 10, 11, and 12 are respectively connected to the conveying pipe 7, the outer cover pipe 8, and the hollow pipe 22. Spiral blades 19 and 20 are located at both ends inside the inner rotating pipe 17. A cutting rod 23, blade 24, and cutting rod 25 are located on the hollow pipe 22, between spiral blades 19 and 20. The area between 20 and 20 is the crushing section 21; both cutting blade 1 23 and cutting blade 25 are connected to the hollow tube 22; the box body 1 is provided with a box door 2, and a rotating rod 14 is rotatably connected inside the conveying pipe 7. The box body 1 is provided with a driving part 1 4 for driving the rotating rod 14 to rotate, and a driving part 2 13 for driving the hollow tube 22 to rotate is provided inside the box body 1; a conveying auger 15 is provided on the rotating rod 14, and a through hole 16 is opened inside the rotating rod 14. A fixed base 32 is provided inside the conveying pipe 7 as a rotating support for the rotating rod 14. The fixed base 32 is provided with an opening 5 3201 that is connected to the through hole 16; an opening 1 701 is opened on the conveying pipe 7, an opening 2 801 is opened on the outer cover pipe 8, and several openings 3 1701 are opened on the inner rotating pipe 17. The openings 1 701, 2 801, and 3 1701 are connected to each other.

[0035] In the present application, the present application aims at the industry pain point that edible insect freeze-dried products are prone to quality degradation due to heat generation during post-processing crushing, and innovatively constructs an integrated technical solution of "multi-layer sleeve cooperation + multi-dimensional cold air temperature control + dynamic crushing adjustment", which focuses on the food characteristics of edible insect freeze-dried products "high protein, high oil, easy oxidation", and realizes low-temperature and clean processing of the materials throughout the process. Among them, the box body 1 serves as a sealed processing cavity, providing an isolated external pollution processing environment for edible insect freeze-dried products, avoiding the contact of materials with dust, microorganisms and other impurities during processing; the sleeved conveying pipe 7, the outer cover pipe 8 and the inner rotating pipe 17 form the core channel for material conveying and crushing, all of which are designed with smooth inner walls for edible materials to prevent material residues from caking and reduce the risk of microbial growth; the hollow pipe 22 has dual functions of "crushing component carrier" and "cold air conveying channel", ensuring that the cutting components are always at low temperature during the crushing process, avoiding friction heat generation and damaging food nutrition.

[0036] At the same time, the present application creates a three-dimensional cold air network through the air inlet one 10, the air inlet two 11 and the air inlet three 12 to accurately match the processing needs of edible insect freeze-dried products: the air inlet one 10 sends cold air into the conveying pipe 7, on the one hand to accelerate the movement of the materials to reduce the residence time and the probability of microbial contamination, and on the other hand to pre-cool the materials to prevent oil softening; the cold air of the air inlet two 11 not only drives the inner rotating pipe 17 to rotate through the blade one 18 (instead of traditional direct drive motor to avoid oil pollution), but also cools the outer wall of the inner rotating pipe 17 to block the transmission of external heat, and part of the cold air enters the air groove 34 through the hole one 701, the hole two 801 and the hole three 1701, and is blown out from the air outlet 36 to scatter the materials and cool them again, ensuring the material loose degree and low temperature state; the cold air of the air inlet three 12 cools the cutting knife bar one 23 and the cutting knife bar two 25 through the hollow pipe 22, avoiding the oxidation of oil and denaturation of protein caused by crushing heat generation, and part of the cold air enters the through hole 16 of the rotating rod 14 through the air outlet 35 and the hole five 3201, cooling the rotating rod 14 and the material conveying auger 15, further strengthening the whole process low temperature protection, and ensuring the nutrition, flavor and color of edible insect freeze-dried products are not damaged.

[0037] Reference Figures 1-9The fixed base 32 is fixedly connected in the conveying pipe 7 through the connecting rod 33, the fixed base 32 is provided with an air groove 34 communicated with the opening hole one 701, the air groove 34 is provided with a jet port 36 opening towards the inner rotating pipe 17, the hollow pipe 22 is provided with a blowing port 35 at a corresponding end of the fixed base 32, the blowing port 35 is communicated with the through hole 16 through the opening hole five 3201, the box body 1 is provided with a partition plate 6, the lower part of the partition plate 6 is provided with a collecting barrel 5 communicated with the discharging pipe 9, the inner rotating pipe 17 is provided with a blade one 18, the cutting rod one 23 and the cutting rod two 25 are respectively provided with a slot one 2301 and a slot two 2501, the cutting rod one 23 is provided with a crushing piece 26, the crushing piece 26 is provided with an abrasive block 27, the upper surface of the abrasive block 27 is provided with a convex part 2701, the abrasive block 27 is fixedly connected with a resisting rod 29, a plurality of groups of springs two 31 are arranged between the crushing piece 26 and the abrasive block 27, the crushing piece 26 is provided with an opening hole four 2601, the opening hole four 2601 is slidably connected with an adjusting block 28 matched with the resisting rod 29, a spring one 30 is arranged between the adjusting block 28 and the crushing piece 26.

[0038] In one embodiment, in order to adapt to the processing specification of edible insect freeze-dried products, the material and structural details of each part are optimized for food grade to ensure processing safety and quality stability. Among them, the box body 1 is made of food-grade 304 stainless steel, which has corrosion resistance and sealing performance, the box door 2 on the box body 1 is selected from food-grade transparent acrylic plate, which can not only observe the material processing state, but also maintain the internal cleanliness; the conveying pipe 7, the cover pipe 8, the inner rotating pipe 17 and the hollow pipe 22 are all food-grade stainless steel pipes, the inner wall is finely polished, the surface roughness is very low, which can effectively avoid the residue of edible insect freeze-dried products and reduce the cleaning difficulty.

[0039] The driving part one 4 and the driving part two 13 are both food-grade servo motors: the driving part one 4 is connected with the rotating rod 14 through a food-grade stainless steel coupling, the coupling is externally sleeved with a food-grade dust cover to prevent motor oil or metal debris from contaminating the material; the driving part two 13 is connected with the hollow pipe 22 through a food-grade gear transmission mechanism, the transmission mechanism is externally provided with a food-grade sealing cover to completely block the contact path between the transmission components and the material. The material conveying auger 15 on the rotating rod 14 is integrally formed of food-grade stainless steel, the edge of the spiral blade is rounded to avoid scratching the pipeline or generating metal debris, and to ensure that there is no dead angle residue in the material conveying.

[0040] The fixed base 32 is welded on the inner wall of the conveying pipe 7 by three groups of food-grade stainless steel connecting rods 33, and the welding position is sealed with food-grade sealant to prevent material debris from entering the gap and breeding bacteria; the air groove 34 and the air outlet 36 in the fixed base 32 are both treated to be smooth to ensure smooth delivery of cold air and no material residue. The abrasive block 27 is made of food-grade hard alloy, and the convex part 2701 is designed as a hemisphere, which can improve the crushing efficiency and reduce the self-wear to avoid mixing of metal impurities; the spring one 30 and the spring two 31 are both made of food-grade stainless steel, which has strong corrosion resistance and does not produce harmful substance pollutants during long-term use.

[0041] The collection barrel 5 is made of food-grade PP material or 304 stainless steel, and the barrel opening is a funnel-shaped material guiding structure to ensure that the material does not spill; the collection barrel 5 is equipped with a food-grade silica gel sealing cover, which can be sealed immediately after collection to prevent the material from oxidizing and deteriorating or being contaminated; the isolation plate 6 is a food-grade acrylic plate that divides the box 1 into a processing area and a collection area to avoid the impact of debris or cold air on the finished product and ensure food cleanliness.

[0042] Reference Figures 1-9 A preparation method of an edible insect freeze-drying device, comprising the following steps:

[0043] S1, check the sealing and cleanliness of each part of the device, prepare the pretreated edible insect freeze-dried material, place the collection barrel 5 under the isolation plate 6, and connect the air inlets one 10, two 11 and three 12 with the external cold source;

[0044] S2, start the driving part one 4, the rotating rod 14 drives the material conveying auger 15 to rotate, open the air inlet one 10, and put the material into the feeding port 3, the cold air pre-cools and accelerates the material into the inner rotating pipe 17;

[0045] S3, open the air inlet two 11, the cold air driving blade one 18 drives the inner rotating pipe 17 to rotate, the air outlet 36 blows cold air to scatter and cool the material, and the spiral blade one 19 feeds the material to the crushing part 21;

[0046] S4, start the driving part two 13, the hollow pipe 22 drives the cutting part to rotate and crush the material, open the air inlet three 12 to cool the cutting part, and dynamically adjust the cold air volume when the material is too much;

[0047] S5, the crushed material enters the collection barrel 5 through the spiral blade two 20 and the discharge pipe 9, and the material is taken out and sealed after the machine is stopped. Clean the device parts.

[0048] Working principle: The working principle of the device is based on the core needs of "low-temperature conveying-uniform crushing-dynamic temperature control-clean collection" of edible insect freeze-dried products, and each part cooperates with the cold air system to ensure food nutrition and safety throughout the process. The specific process is as follows:

[0049] I. Material feeding and low-temperature conveying:

[0050] The operator puts the pretreated edible insect freeze-dried product into the feeding port 3, and the material enters the conveying pipe 7 under the action of gravity. Start the driving part one 4, and the driving part one 4 drives the rotating rod 14 to rotate, and the conveying auger 15 on the rotating rod 14 rotates synchronously, and the material is stably conveyed to the inner rotating pipe 17 through the screw thrust. At the same time, the external cold source connected with the air inlet one 10 is started, and the cold air enters the conveying pipe 7: on the one hand, it forms an airflow to push the material to move faster, reduces the material residence time to reduce the risk of microbial contamination; on the other hand, it directly contacts the material for pre-cooling, maintains the low temperature state of the material, and prevents the internal oil from softening due to the increase of environmental temperature, laying a quality foundation for subsequent crushing.

[0051] II. Inner rotating pipe driving and material conveying:

[0052] The cold source of the air inlet two 11 is started, and the cold air enters the interlayer between the outer cover pipe 8 and the inner rotating pipe 17: part of the cold air acts on the blade one 18 on the outer wall of the inner rotating pipe 17, generating a circumferential thrust to drive the inner rotating pipe 17 to rotate stably around the conveying pipe 7, avoiding the oil pollution that may be caused by traditional motor direct drive; another part of the cold air directly cools the outer wall of the inner rotating pipe 17, blocks the external heat transfer, and ensures that the material in the inner rotating pipe 17 is always at low temperature.

[0053] During the rotation of the inner rotating pipe 17, the multiple groups of open hole three 1701 on the surface of the inner rotating pipe 17 will be aligned with the open hole two 801 of the outer cover pipe 8 and the open hole one 701 of the conveying pipe 7 periodically, at this time part of the cold air of the air inlet two 11 enters the air groove 34 of the fixed base 32 through the above-mentioned open holes in turn, and then is sprayed out in the form of dispersed airflow from the air jet 36, directly acting on the edible insect freeze-dried product in the inner rotating pipe 17: not only dispersing the gathered material to prevent caking from affecting the uniformity of crushing, but also cooling the material twice to further reduce the material temperature. At the same time, the spiral blade one 19 in the inner rotating pipe 17 rotates with the inner rotating pipe 17, and the material is stably conveyed to the crushing part 21 between the spiral blade one 19 and the spiral blade two 20 through the spiral structure, providing uniform material supply for the crushing link.

[0054] III. Low-temperature crushing and dynamic temperature control:

[0055] Start the driving part two 13, and the driving part two 13 drives the hollow pipe 22 to rotate through the gear transmission mechanism, and the cutting knife rod one 23, the blade two 24 and the cutting knife rod two 25 on the hollow pipe 22 rotate synchronously at high speed. The blade two 24 stirs the material in the crushing part 21, ensuring that the material uniformly contacts the cutting knife rod one 23 and the cutting knife rod two 25, avoiding local accumulation leading to uneven crushing; the crushing piece 26 on the cutting knife rod one 23 rotates at the same time, and the abrasive block 27 and the convex part 2701 on the crushing piece 26 cooperate with the inner wall of the inner rotating pipe 17 to crush the edible insect freeze-dried product by extrusion and cutting, obtaining a particle size meeting the requirements of food deep processing.

[0056] The cold source of the air inlet three 12 is started synchronously, and the cold air enters the slot one 2301 of the cutting rod one 23 and the slot two 2501 of the cutting rod two 25 through the hollow pipe 22, directly taking away the friction heat generated by cutting and crushing, so that the cutting part is maintained at low temperature, avoiding high temperature to cause oil oxidation and spoilage in the material, protein denaturation, and preventing the material from adhering and blocking the equipment. In addition, part of the cold air enters the opening five 3201 of the fixed base 32 through the air outlet 35 of the hollow pipe 22, and then enters the through hole 16 of the rotating rod 14, cooling the rotating rod 14 and the material conveying auger 15, and indirectly strengthening the low-temperature protection of the material in the conveying stage.

[0057] When the material in the crushed material part 21 is too much, the material extrudes the abrasive block 27 to shrink into the interior of the crushing part 26, and the spring two 31 is compressed; the resistance rod 29 in the abrasive block 27 moves at the same time, pushes the adjusting block 28 to slide on the opening four 2601 of the crushing part 26, and the spring one 30 is compressed. In the initial state, the adjusting block 28 blocks half of the opening of the opening four 2601, and the amount of cold air is small; after the adjusting block 28 slides, the opening of the opening four 2601 expands with the increase of the extrusion amount of the material, and the amount of cold air increases synchronously, which cools the abrasive block 27, avoids the sudden increase of heat production to affect the food quality, and realizes the dynamic adaptation of the crushing cold air amount.

[0058] Four, material export and clean collection:

[0059] The crushed edible insect freeze-dried product moves to the direction of the hollow pipe 22 under the pushing force of the spiral piece two 20 (rotating with the inner rotating tube 17), and finally enters the discharge pipe 9; the material falls along the discharge pipe 9, passes through the isolation plate 6 and falls into the collection barrel 5. The whole process is in a closed low-temperature environment, and the material will not be deteriorated due to temperature rise, nor will it be contaminated by external impurities, completing the safe crushing and collection of the edible insect freeze-dried product.

[0060] It should be noted that the relational terms herein such as first and second and the like are used only to differentiate one entity or action from another, and do not necessarily require or imply that any such actual relationship or order exists between or among the entities or actions. Also, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles or devices.

[0061] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An edible grade insect freeze-drying preparation device, comprising a box body (1), characterized in that: a conveying pipe (7) and an outer cover pipe (8) are sleeved together in the box body (1), an inner rotating pipe (17) is arranged in the outer cover pipe (8), and the inner rotating pipe (17) is rotationally connected to the conveying pipe (7); a hollow pipe (22) is rotationally connected to the inner rotating pipe (17); a feeding port (3) is arranged on the conveying pipe (7), and a discharging pipe (9) is arranged on the hollow pipe (22); air inlets (10), (11) and (12) are respectively arranged in the conveying pipe (7), the outer cover pipe (8) and the hollow pipe (22); spiral fins (19) and (20) are respectively arranged at both ends of the inner rotating pipe (17); a cutting knife bar (23), a blade (24) and a cutting knife bar (25) are arranged on the hollow pipe (22), the cutting knife bar (23), the blade (24) and the cutting knife bar (25) are located between the spiral fins (19) and (20), and a crushed material part (21) is formed between the spiral fins (19) and (20); the cutting knife bars (23) and (25) are connected to the hollow pipe (22). A box door (2) is arranged on the box body (1), a rotating rod (14) is rotationally connected to the conveying pipe (7), a driving part (4) is arranged on the box body (1) and used for driving the rotating rod (14) to rotate, and a driving part (13) is arranged in the box body (1) and used for driving the hollow pipe (22) to rotate. A material conveying auger (15) is arranged on the rotating rod (14), a through hole (16) is formed in the rotating rod (14), a fixed base (32) is arranged in the conveying pipe (7) and used as a rotating support of the rotating rod (14), and an opening (3201) is formed in the fixed base (32) and connected to the through hole (16). An opening (701) is formed in the conveying pipe (7), an opening (801) is formed in the outer cover pipe (8), and a plurality of openings (1701) are formed in the inner rotating pipe (17), and the openings (701), (801) and (1701) are connected to each other. The fixed base (32) is fixedly connected to the conveying pipe (7) through a connecting rod (33), an air groove (34) is formed in the fixed base (32) and connected to the opening (701), a gas injection port (36) is formed in the air groove (34) and faces the inner rotating pipe (17), a gas supply port (35) is formed in one end of the hollow pipe (22) and corresponds to the fixed base (32), and the gas supply port (35) is connected to the through hole (16) through the opening (3201). An isolation plate (6) is arranged in the box body (1), a collecting barrel (5) is arranged below the isolation plate (6) and connected to the discharging pipe (9), and a blade (18) is arranged on the inner rotating pipe (17).

2. A food grade insect lyophilization preparation apparatus according to claim 1, characterized in that: ​ 3. A food grade insect lyophilization preparation apparatus as claimed in claim 2, wherein: ​ 4. A food grade insect lyophilization preparation apparatus as claimed in claim 3, wherein: ​ 5. A food grade insect lyophilization preparation apparatus as claimed in claim 4, wherein: ​ 6. The food grade insect lyophilization preparation apparatus according to claim 1, wherein: ​ 7. The food grade insect lyophilization preparation apparatus according to claim 1, wherein: The cutting knife bar one (23) and cutting knife bar two (25) are respectively provided with slot one (2301) and slot two (2501), and the cutting knife bar one (23) is provided with a crushing part (26).

8. A food grade insect lyophilization preparation apparatus as claimed in claim 7, wherein: The crushing part (26) is provided with an abrasive block (27), the upper surface of the abrasive block (27) is provided with a convex part (2701), the abrasive block (27) is fixedly connected with a resisting rod (29), and a plurality of groups of spring two (31) are arranged between the abrasive block (27) and the crushing part (26).

9. A food grade insect lyophilization preparation apparatus as claimed in claim 8, wherein: The crushing part (26) is provided with a fourth opening (2601), the fourth opening (2601) is slidably connected with an adjusting block (28) matched with the resisting rod (29), and spring one (30) is arranged between the adjusting block (28) and the crushing part (26).

10. A method of preparing a freeze-drying device for edible insects, comprising a freeze-drying device for edible insects according to any one of claims 1 to 9, characterized in that The method comprises the following steps: S1, check the sealing and cleanliness of each part of the device, prepare the pretreated edible insect freeze-dried material, place the collection barrel (5) under the isolation plate (6), and connect the air inlet one (10), the air inlet two (11) and the air inlet three (12) with the external cold source; S2, start the driving part one (4), the rotating rod (14) drives the material conveying auger (15) to rotate, open the air inlet one (10), and pour the material into the feeding port (3), the cold air pre-cools and accelerates the material into the inner rotating pipe (17); S3, open the air inlet two (11), the cold air drives the blade one (18) to drive the inner rotating pipe (17) to rotate, the air outlet (36) blows cold air to scatter and cool the material, and the spiral blade one (19) feeds the material to the crushing part (21); S4, start the driving part two (13), the hollow pipe (22) drives the cutting part to rotate and crush the material, open the air inlet three (12) to cool the cutting part, and dynamically adjust the cold air volume when the material is too much; S5, the crushed material enters the collection barrel (5) through the spiral blade two (20) and the discharge pipe (9), and the material is taken out after the device is stopped, sealed and cleaned.

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