Freeze drying equipment for processing special flavor rice

Abstract

The invention relates to the technical field of rice processing, in particular to special flavor rice processing freeze drying equipment which comprises a condensing box and a cuboid material bin arranged in the condensing box. A plurality of sets of turning paired frames are symmetrically installed on the inner walls of the two sides of the material bin, each set of turning paired frame is composed of turning paired frame units oppositely arranged on the two sides, and each turning paired frame unit comprises a supporting building frame, an adjusting frame, a supporting cylinder, a synchronous transmission piece and a spiral turning piece. The top of the condensation box is provided with a box top plate and a top support, the top support is provided with a sliding support section capable of moving transversely, the bottom end is provided with a multilayer porous ceramic water vapor adsorption piece in a hoisting mode, the bottom end is filled with an activated carbon layer and connected with an external vacuum pump, and an adsorption area directly faces a middle working area of the overturning opposite frame. The sliding branch section drives the water vapor adsorption part to transversely move synchronously with throwing of the turning part. Through mechanical-airflow-control multi-dimensional cooperation, oxidation is prevented while water vapor is efficiently captured, flavor components are further locked, and the processing quality of the high-quality flavor rice is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of rice processing, and specifically to a freeze-drying device for processing flavor-specialized rice. Background Art

[0002] Currently, freeze-drying devices for agricultural product processing generally adopt a static shelf structure, maintaining a negative pressure environment in the box body through a vacuum pump and cooperating with a refrigeration system to achieve material dehydration. Some improved devices are provided with spiral turning rods or scraper stirrers in the drying chamber to improve drying uniformity through mechanical turning; for water vapor treatment, an external condenser is mostly used for low-temperature trapping, or an activated carbon adsorption layer is provided in the exhaust pipe.

[0003] Although such technologies can improve the drying efficiency to a certain extent, there are still significant limitations when processing flavor-specialized rice with high flavor retention requirements. The turning mechanism and the steam discharge system operate independently. The turning parts only displace the surface layer of materials, and deep-layer water vapor is likely to stay in the gaps between rice grains due to the lack of directional guidance, resulting in a large local humidity difference in the later stage of drying. This defect leads to a low drying rate of the materials in the overall box body, and during its long drying process, a large amount of volatile flavor substances are lost along with the disorderly escaping water vapor, and the actual retention rate is less than 60%, seriously restricting the processing quality of high-quality flavor rice. Summary of the Invention

[0004] The purpose of the present invention is to provide a freeze-drying device for processing flavor-specialized rice to solve the problems mentioned in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A freeze-drying device for processing special-flavor rice, comprising a condensation box and a cuboid material bin arranged therein. Multiple groups of turning pairs are symmetrically installed on the inner walls on both sides of the material bin, and each group of turning pairs is composed of turning pair units arranged oppositely on both sides; each turning pair unit includes a support bracket, an adjustment bracket, a support cylinder, a synchronous transmission part and a spiral turning part. Among them, the support bracket is fixed on the inner wall of the material bin, and a slide rail is provided on its surface, and the adjustment bracket is installed in an adjustable manner through bolts. The support cylinders are arranged side by side on the adjustment bracket, and the outer ends of adjacent support cylinders are linked and rotated through the synchronous transmission part, and a spiral turning part for turning rice grains is welded at the inner end; a box top plate and a top support bracket are provided on the top of the condensation box. A slidable support section that can move horizontally is installed on the top support bracket, and a multi-layer porous ceramic structure water vapor adsorbent is hoisted at its bottom end. The water vapor adsorbent is filled with an activated carbon layer inside and is connected to an external vacuum pump through a hose, and its adsorption area is directly opposite to the middle working area of the turning pair units on both sides; the device also includes a PLC control system, which real-time monitors the moisture content of the material bin through a humidity sensor and stepwise adjusts the rotation speed of the support cylinder based on a preset threshold. When the moisture content drops from 20% to 8%, the rotation speed drops from 15 rpm to 5 rpm. At the same time, the horizontal movement of the water vapor adsorbent driven by the slidable support section is synchronized with the throwing action of the turning part to achieve efficient water vapor adsorption and uniform drying of rice grains.

[0006] As a further solution of the present invention: the support bracket includes a support frame plate fixed on the box wall of the condensation box and a sliding rod arranged thereon. The adjustment bracket includes a support frame rail and sliding blocks at both ends, and the sliding blocks are slidably installed on the sliding rod. The support cylinder is fixed on the support frame rail through an installation hoop.

[0007] As a further solution of the present invention: the synchronous transmission part includes an outer support cylinder arranged at the tail end of the support cylinder, an outer cylinder sleeve sleeved on the outside thereof, and a working gear arranged on the outer cylinder sleeve. Adjacent working gears are meshed with a phase angle deviation of °, and the end gear is connected to a servo motor through a coupling; the turning part includes a spiral support rod and a scattering rod frame. The spiral support rod is matched with the inner wall of the support cylinder through threads and realizes telescopic movement with the forward / backward rotation of the support cylinder. The scattering rod frame is provided with multiple groups of scattering turning thin rods.

[0008] As a further solution of the present invention: the spiral support rod, the support cylinder and the outer support cylinder are all hollow structures and are sequentially connected to form an air flow channel. The surface of the spiral support rod is axially uniformly provided with ventilation holes with a diameter of 1.5 mm, and an air inlet is provided at the tail end of the outer support cylinder and is connected to an external vacuum pump through a flange.

[0009] As a further solution of the present invention: the slidable support section includes a sliding base frame, a hoisting profile and a polyurethane synchronous belt. The sliding base frame is vertically fixed on the top box support beam through M bolts. The bottom of the hoisting profile is provided with a T-shaped chute. The synchronous belt is driven by a servo motor, and a hoisting base plate is fixed on the belt surface to hoist the water vapor adsorbent.

[0010] As a further solution of the present invention: The water vapor adsorption component includes an adsorption box, an output cylinder and an adsorption panel. The adsorption panel is a porous titanium alloy substrate sprayed with a hydrophobic coating and is connected to the adsorption box through a gas transmission pipe. The adsorption box forms a gradient negative pressure of -50 kPa to -80 kPa on the panel surface through an external vacuum pump.

[0011] As a still further solution of the present invention: The adsorption panel is fixed below the output cylinder through a support frame plate, and its movement trajectory and the throwing frequency of the turning member are dynamically matched through a PLC. The PLC control system monitors the moisture content of the rice grains in real time through an infrared sensor. When the moisture content ≤ 8%, the rotation speed of the support cylinder is automatically reduced to 5 rpm, and the moving speed of the water vapor adsorption component is synchronously adjusted to 30% of the initial value.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: I. Low-temperature and high-efficiency sublimation and flavor retention The equipment combines a vacuum pressure (≤ 10 Pa) in an extremely low-temperature environment of -40~-50 °C, enabling the direct sublimation of the moisture inside the rice grains, avoiding the destruction of cell structure caused by the melting of ice crystals, and completely retaining the original flavor substances of the rice. Through the forward and reverse telescopic movements of the dynamic turning mechanism, the spiral turning member penetrates into the rice grain pile to form a three-dimensional disturbance, continuously lifting and dispersing the bottom rice grains, increasing the cold-exposed surface area of the rice grains by more than 35%, increasing the sublimation rate by 25%, shortening the drying time and reducing energy consumption at the same time.

[0013] II. Mechanical turning and airflow collaborative optimization The turning mechanism adopts a two-way telescopic design: when rotating forward, the turning member extends into the rice grain pile to break up the lumps, and when contracting reversely, it combs the surface rice grains to eliminate the interstitial air cavities. Combining the multi-stage ventilation holes embedded in the hollow turning structure and the vacuum suction system, an axial airflow channel is formed, shortening the escape path of the water vapor in the rice grain gaps by 40%, reducing the standard deviation of the sublimation rate to 0.9%, and achieving a significant optimization of the drying uniformity.

[0014] III. Intelligent dynamic matching control The PLC system based on the humidity sensor real-time regulates the turning speed and the moving rhythm of the adsorption component. High-speed turning (15 rpm) in the initial stage improves the drying efficiency. When the moisture content drops to 8%, the speed is automatically reduced to 5 rpm to reduce mechanical impact and avoid the generation of micro-cracks on the surface of the rice grains; at the same time, it controls the lateral movement trajectory of the adsorption component and the turning and throwing actions to ensure the accurate matching of the water vapor adsorption and the turning frequency of the rice grains, avoiding local over-drying or caking.

[0015] The present invention breaks through the static limitations of traditional freeze-drying. Through the multi-dimensional collaboration of machinery-airflow-control, it realizes a 25% increase in drying efficiency and a 30% reduction in energy consumption. While efficiently capturing water vapor, it prevents oxidation and further locks in flavor components, providing core technical support for the processing of high-quality special rice.

[0016] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and form a part of this specification, showing the embodiments consistent with this application, and are used together with the specification to explain the principles of this application. At the same time, these drawings and the written description are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by reference to specific embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the freeze-drying equipment for processing flavor-specialized rice provided by an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the turning pair frame provided by an embodiment of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the adjusting frame provided by an embodiment of the present invention.

[0021] Figure 4 It is a schematic diagram of the installation of the support cylinder provided by an embodiment of the present invention.

[0022] Figure 5 For the present invention Figure 4 The schematic diagram of the structure of area A in the figure.

[0023] Figure 6 It is a schematic diagram of the structure of the sliding support section provided by an embodiment of the present invention.

[0024] Figure 7 It is a schematic diagram of the structure of the water vapor adsorption member provided by an embodiment of the present invention.

[0025] In the figure: 1, condensation box; 2, material bin; 3, turning pair frame; 31, support bracket; 311, support frame plate; 312, sliding rod; 32, adjusting frame; 321, support frame railing; 322, sliding block; 323, mounting hoop; 33, support cylinder; 34, synchronous transmission member; 341, outer support cylinder; 342, outer cylinder sleeve; 343, working gear; 344, air inlet; 35, turning member; 351, spiral support rod; 352, scattering rod frame; 353, ventilation hole; 4, box top plate; 5, top bracket; 6, top box support beam; 7, sliding support section; 71, sliding base frame; 72, hoisting profile; 73, sliding belt; 74, hoisting base plate; 8, water vapor adsorption member; 81, adsorption box; 82, output cylinder; 83, support frame plate; 84, adsorption panel; 85, gas transmission pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and the examples are shown in the drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0027] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] The following will describe the specific implementation of the present invention in detail with reference to specific embodiments.

[0029] Embodiment 1, please refer to Figure 1 and Figure 2 , a freeze-drying device for processing flavor-specialized rice is provided, including a condensation box 1 and a material bin 2 arranged in the condensation box 1. A number of turning pairs of frames 3 are arranged in the material bin 2. Each group of turning pairs of frames 3 is composed of a pair of turning pairs of frames 30, and the turning pairs of frames 30 are arranged on both sides of the material bin 2 and are arranged opposite to each other; the turning pairs of frames 30 include a support bracket 31 installed on the inner side wall of the material bin 2, an adjustment frame 32 installed on the support bracket 31, and a number of support cylinders 33 arranged on the adjustment frame 32. The support cylinders 33 are arranged in parallel, and synchronous transmission parts 34 are installed at the outer ends of the support cylinders 33. Adjacent support cylinders 33 are synchronously transmitted through the synchronous transmission parts 34, and turning parts 35 are installed at the inner ends of the support cylinders 33.

[0030] A box top plate 4 is also erected on the condensation box 1, and a top support 5 is installed on the box top plate 4. A top box support beam 6 is erected on the top support 5. A number of sliding support segments 7 are arranged on it. The sliding support segments 7 are in one-to-one correspondence with the turning pairs of frames 3. A water vapor absorption attachment 8 is suspended at the bottom end of the sliding support segment 7, and the water vapor absorption attachment 8 is located above the middle area between the support brackets 31 on both sides.

[0031] Inside the condensation box 1, there is a cuboid material bin 2, and multiple groups of flipping pairs 3 are symmetrically installed on both sides of the bin body. Each group of flipping pairs 3 consists of two columns of independently adjustable flipping pairs 30, which are fixed to the inner wall of the bin body through support brackets 31. The support brackets 31 are made of stainless steel frames, with slide rails on the surface. The adjusting frame 32 is fixed to different positions of the slide rails through bolts, and the installation angle of the support cylinder 33 can be adjusted according to the stacking height of the rice grains. The support cylinder 33 is made of hollow aluminum alloy pipes, and the outer ends are linked and rotated adjacent support cylinders through synchronous transmission parts 34. The inner ends are welded with spiral flipping parts 35. The box top plate 4 is arranged in the upper area of the condensation box 1. The top of the condensation box 1 is also provided with a lifting and installing a whole box cover plate, forming a complete closed box body when closed. The whole box cover plate is installed through a hydraulic lifting device and can be lifted as a whole for maintenance. A laterally moving sliding support section 7 is installed on the top support 5, and the servo motor drives the guide rail slider to drive the water vapor suction attachment 8 to reciprocate laterally above the material bin 2. The water vapor suction attachment 8 is made of multi-layer porous ceramic materials, with an activated carbon adsorption layer filled inside, and is connected to an external vacuum pump through a hose. The adsorption area is directly opposite to the middle working area of the flipping pair 3. After starting the equipment, the condensation box 1 reduces the internal pressure to below 10 Pa through an external vacuum pump, and the refrigeration system quickly reduces the temperature of the material bin 2 to -40~-50 °C. At this stage, the moisture inside the rice grains separates in the form of sublimation. Through precise temperature control, the secondary melting of ice crystals is effectively avoided from damaging the cell structure of the rice grains, and the original flavor substances of the rice are retained. At the same time, the driving motor of the flipping pair 3 drives all the support cylinders 33 to rotate synchronously at 15 rpm through the synchronous transmission parts 34. The spiral flipping parts 35 form flipping during rotation. The flipping parts 35 lift the bottom rice grains upward, breaking the caking phenomenon caused by traditional static freezing and increasing the cold-receiving surface area of the rice grains by more than 35%. When water vapor separates from the surface of the rice grains, the sliding support section 7 on the box top plate 4 drives the water vapor suction attachment 8 to reciprocate laterally along the guide rail through the servo motor, and its movement trajectory is synchronized with the throwing rhythm of the flipping parts 35. At the same time, this embodiment also realizes multi-parameter dynamic matching through the PLC control system. The data is fed back through the humidity sensor in the material bin. When the moisture content drops from the initial 20% to 8%, the system automatically reduces the rotation speed of the support cylinder 33 from 15 rpm to 5 rpm in steps to avoid micro-cracks on the surface of the dried rice grains caused by excessive mechanical action.

[0032] Embodiment 2. Based on the content described in the above embodiment, for the specific implementation structure of the flipping pair 30, the following design is made in this embodiment: The support frame 31 includes a support frame plate 311 installed on the wall of the condensing box 1 and a sliding rod 312 arranged on the support frame plate 311. The adjustment frame 32 includes a support frame fence 321 and sliding blocks 322 installed at both ends of the support frame fence 321. The sliding blocks 322 are slidably installed on the sliding rod 312. The support cylinder 33 is installed on the support frame fence 321 through a mounting hoop 323. The synchronous transmission member 34 includes an outer support cylinder 341 installed at the rear end of the support cylinder 33, an outer cylinder sleeve 342 installed on the outer support cylinder 341, and an operating gear 343 arranged on the outer cylinder sleeve 342. Adjacent operating gears 343 are butted in tooth pattern, and one section of the operating gear 343 is externally connected to a driving gear. The outer support tube 341 is a carbon steel sleeve with an inner diameter of 60.2 mm, which is press-fitted on the rear end of the support tube 33 with an interference fit. The teeth of adjacent working gears 343 mesh with a phase angle deviation of 15°, and the end gear is connected to a 1.5kW servo motor drive through a coupling. The spiral support rod 351 (a trapezoidal threaded rod with a lead of 120 mm and a diameter of 30 mm) of the flipping member 35 cooperates with the thread groove (pitch of 120 mm) on the inner wall of the support tube 33, and a scattering rod frame 352 (a 316L stainless steel disc with a diameter of 200 mm, 12 groups of Φ3 mm flipping thin rods with a length of 150 mm are evenly distributed on the edge, and adjacent thin rods are arranged at a scattering angle of 5°) is welded to the front end of the spiral support rod 351. The flipping member 35 includes a spiral support rod 351 and a scattering rod frame 352 installed on the spiral support rod 351. A plurality of groups of flipping thin rods are arranged on the scattering rod frame 352, and each group of flipping thin rods is arranged in a scattered shape.

[0033] The gear linkage efficiency enhancement drive motor realizes multi-stage synchronous transmission through the working gear 343 group. During operation, it first rotates and extends in the forward direction. When the support tube 33 rotates clockwise at 15rpm, the spiral support rod 351 produces axial displacement due to the threaded fit, and the scattering rod frame 352 gradually extends into the rice grain pile to the maximum stroke. The scattering arrangement of the flipping thin rods forms a three-dimensional disturbance, and then reverse rotation and contraction are performed. The motor direction is switched, and the spiral support rod 351 retracts at the same speed. The flipping thin rod has a secondary combing effect on the surface rice grains during the retraction process, eliminating the gap cavitation caused by the shrinkage of the rice grains during drying, and increasing the sublimation rate of water vapor.

[0034] When the infrared sensor detects that the moisture content of the rice grains is lower than 8%, the control system reduces the rotation speed of the support cylinder from 15 rpm to 5 rpm, reducing the tangential impact force of the scattering rod frame 352, thereby avoiding excessive mechanical action that may cause micro cracks on the surface of the dry rice grains.

[0035] Preferably, the 3 mm end of the thin turning rod is coated with flexible silicone. When encountering agglomerated rice balls, the thin rod can produce an elastic deflection of ≤5°, effectively preventing the risk of the rice balls being damaged by impact. The spiral support rod 351, support tube 33 and outer support tube 341 are all hollow structures and are connected in sequence to form a through-type air flow channel. The outer surface of the spiral support rod 351 is evenly arranged with multiple groups of vent holes 353 with a diameter of 1.5 mm (spacing 20 mm, and the hole groups are distributed in a spiral line) along the axial direction. The outer support tube 341 is provided with an air inlet 344 (inner diameter 15 mm) at the center line of the tail end, which is connected to the exhaust pipe through a flange (externally connected to a vacuum pump, the exhaust rate is ≥50L / min). The inner hollow channel of the support tube 33 has a diameter of 25 mm and is sealed and connected to the hollow cavity (diameter 20 mm) of the spiral support rod 351 through a conical transition section. The outer support tube 341 is made of carbon steel, with a hard chrome layer (thickness 0.1 mm) on the inner wall, and has an interference fit with the support tube 33 (tolerance H7 / p6) to ensure air tightness. The air inlet 344 has a built-in one-way valve (opening pressure -5kPa). The one-way valve structure of the air inlet 344 prevents the backflow of external air and prevents the rice grains from oxidizing and deteriorating. During the freeze-drying process, the vacuum pump evacuates the hollow channel through the air inlet 344, and the water vapor between the rice grains enters the hollow cavity of the spiral support rod 351 through the vent 353 and is discharged along the air flow channel of the support tube 33 and the outer support tube 341. 27. Through the dispersed adsorption of the multi-stage vent 353, the escape path of water vapor inside the rice grain pile is shortened by 40%, and the drying efficiency is improved by 25%; the axial airflow of the hollow structure and the radial disturbance of the flipping thin rod form a three-dimensional convection, and the standard deviation of the sublimation rate is reduced from 1.8% to 0.9%.

[0036] This design solves the problems of uneven water vapor discharge and flavor loss during freeze drying through the synergistic effect of air flow channels and mechanical tumbling, effectively improving the drying rate and reducing the defect of flavor loss during the drying process.

[0037] Embodiment 3: Based on the contents of the above embodiments, the specific implementation structure of the water vapor adsorbent 8 is designed as follows: The sliding support section 7 includes a sliding base frame 71, a lifting profile 72 installed on the sliding base frame 71, and a sliding belt 73 arranged at the bottom of the lifting profile 72. The sliding base frame 71 is fixed on the beam body of the top box support beam 6. A lifting base plate 74 is installed on the belt surface of the sliding belt 73, and the water vapor adsorption component 8 is lifted on the lifting base plate 74. The sliding base frame 71 is made of 6063-T5 aluminum alloy profile, which is vertically fixed on the beam body of the top box support beam 6 by M12 bolts, and a T-shaped slide groove with a width of 22mm is processed at the bottom; the lifting profile 72 is fixed in the slide groove of the sliding base frame 71 by bolts, and the surface of the guide rail is sprayed with polyurethane wear-resistant coating; the sliding belt 73 is made of polyester fiber reinforced polyurethane synchronous belt, which is laid parallel in the C-shaped groove of the lifting profile 72 after tensioning and driven by a servo motor; the lifting base plate 74 is fixed on the tooth surface of the sliding belt 73 by a snap clamp, and 4 groups of M8 threaded holes are evenly distributed on the plate surface for lifting the water vapor adsorption component 8. The water vapor adsorbing component 8 includes an adsorption box 81, an output cylinder 82 installed on the adsorption box 81, and an adsorption panel 84 disposed below the output cylinder 82. A support frame plate 83 is installed on the box wall of the output cylinder 82, and the adsorption panel 84 is fixed to the support frame plate 83. The adsorption panel 84 is connected to the inside of the adsorption box 81 through an air delivery pipe 85. The adsorption panel 84 is made of a porous titanium alloy substrate, is communicated with the adsorption box 81 through the air delivery pipe 85, and a hydrophobic coating is sprayed on the surface of the panel.

[0038] The servo motor drives the movement of the sliding belt 73, and drives the water vapor adsorbing component 8 to move through the hoisting substrate 74, so that the water vapor adsorbing component 8 can perform reciprocating sweeping along the guide rail. The adsorption panel 84 is located directly above the trajectory of the rice grain throwing. Its moving speed and the throwing frequency of the turning member 35 are dynamically matched through the PLC, which not only optimizes the efficiency of water vapor capture, but also ensures the uniform dehydration of the rice grains during the freeze-drying process and the rapid and effective removal of moisture, thereby retaining the original flavor and nutritional value of the rice. The adsorption box 81 forms a gradient negative pressure of -50 kPa to -80 kPa on the surface of the adsorption panel 84 through an external vacuum pump, and water vapor enters the air delivery pipe 85 through the porous titanium alloy substrate. When the infrared sensor detects that the moisture content of the rice grains is lower than 8%, the control system reduces the rotation speed of the support cylinder from 15 rpm to 5 rpm, synchronously adjusts the moving speed of the water vapor adsorbing component (8) to a certain percentage of the initial value, reduces the moving rate, increases the water vapor absorption time for each area, and performs precise adsorption. Through the collaborative operation of the sliding support section 7 and the water vapor adsorbing component 8 in this embodiment, breakthroughs are achieved in dimensions such as precise adsorption, anti-blocking and hydrophobicity, and flavor recovery, providing reliable technical support for the freeze-drying of high-quality agricultural products.

[0039] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

[0040] In addition, it should be understood that although this specification is described according to embodiments, not each embodiment only includes an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A freeze-drying device for processing flavored rice, comprising a condensation box (1) and a rectangular material bin (2) arranged therein, characterized in that: A plurality of groups of flipping racks (3) are symmetrically mounted on the inner walls of both sides of the material bin (2), each group of flipping racks is composed of flipping rack units (30) arranged opposite to each other on both sides; each flipping rack unit comprises a supporting frame (31), an adjusting frame (32), a supporting cylinder (33), a synchronous transmission member (34) and a spiral flipping member (35), wherein the supporting frame (31) is fixed to the inner wall of the material bin, a slide rail is provided on the surface of the supporting frame and the adjusting frame (32) is adjustably mounted by bolts, the supporting cylinders (33) are arranged in parallel on the adjusting frame, the outer ends of adjacent supporting cylinders are linked to rotate by the synchronous transmission member (34), and the inner ends are welded with a spiral flipping member (35) for flipping rice grains; The top of the condensation box (1) is provided with a box top plate (4) and a top bracket (5), a sliding support section (7) that can move laterally is installed on the top bracket, and a water vapor adsorbent (8) with a multi-layer porous ceramic structure is hoisted at the bottom end thereof, and the adsorption area of the water vapor adsorbent (8) is directly opposite to the middle working area of the flip racks (3) on both sides; The device also includes a PLC control system, which monitors the moisture content of the material bin in real time through a humidity sensor, and adjusts the rotation speed of the support cylinder in a step-by-step manner based on a preset threshold value, wherein when the moisture content decreases from 20% to 8%, the rotation speed decreases from 15 rpm to 5 rpm, and at the same time, the sliding support segment (7) drives the lateral movement of the water vapor adsorption component (8) to be synchronized with the throwing action of the flipping component (35).

2. The freeze-drying equipment for processing flavor-specialized rice according to claim 1, characterized in that, The support frame (31) comprises a support frame plate (311) fixed to the wall of the condensation box (1) and a sliding rod (312) arranged thereon, the adjustment frame (32) comprises a support frame rail (321) and sliding blocks (322) at both ends, the sliding blocks (322) are slidably mounted on the sliding rod (312), and the support tube (33) is fixed to the support frame rail (321) via a mounting hoop (323).

3. The freeze-drying equipment for processing flavor-specialized rice according to claim 2, characterized in that, The synchronous transmission member (34) comprises an outer support tube (341) arranged at the rear end of the support tube (33), an outer tube sleeve (342) sleeved thereon, and an operating gear (343) arranged on the outer tube sleeve (342); adjacent operating gears (343) are meshed with a phase angle deviation of 15°, and the end gear is connected to a servo motor via a coupling; The flipping member (35) comprises a spiral support rod (351) and a scattering rod frame (352); the spiral support rod (351) cooperates with the inner wall of the support tube (33) via a thread, and realizes telescopic movement as the support tube (33) rotates; the scattering rod frame (352) is provided with a plurality of groups of scattering thin flipping rods.

4. The freeze-drying equipment for processing flavor-specialized rice according to claim 3, wherein, The spiral support rod (351), the support tube (33) and the outer support tube (341) are all hollow structures and are connected in sequence to form an air flow channel. The surface of the spiral support rod (351) is evenly distributed axially with air vents (353) having a diameter of 1.5 mm. The rear end of the outer support tube (341) is provided with an air inlet (344) which is connected to an external vacuum pump via a flange.

5. The freeze-drying equipment for processing flavor-specialized rice according to claim 1, characterized in that, The sliding support section (7) includes a sliding base frame (71), a hoisting profile (72), and a polyurethane synchronous belt (73). The sliding base frame (71) is vertically fixed to the top box support beam (6) by M12 bolts. A T-shaped chute is provided at the bottom of the hoisting profile (72). The synchronous belt (73) is driven by a servo motor, and the belt surface fixes a hoisting base plate (74) to hoist the water vapor adsorbing accessory (8).

6. The freeze-drying equipment for processing flavor-specialized rice according to claim 5, characterized in that, The water vapor adsorbing accessory (8) includes an adsorption box (81), an output cylinder (82), and an adsorption panel (84). The adsorption panel (84) is a porous titanium alloy substrate sprayed with a hydrophobic coating and is connected to the adsorption box (81) through an air delivery pipe (85). The adsorption box (81) forms a gradient negative pressure of -50 kPa to -80 kPa on the panel surface through an externally connected vacuum pump.

7. The freeze-drying equipment for processing flavor-specialized rice according to claim 6, characterized in that, The adsorption panel (84) is fixed below the output cylinder (82) through a support frame plate (83), and its movement trajectory is dynamically matched with the throwing frequency of the turning part (35) through a PLC; The PLC control system monitors the moisture content of rice grains in real time through an infrared sensor. When the moisture content ≤ 8%, it automatically reduces the rotation speed of the support cylinder (33) to 5 rpm and synchronously adjusts the moving speed of the water vapor adsorbing accessory (8) to 30% of the initial value.

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