A fermentation device and a microbial fermentation process for prefabricated dishes

Abstract

The present invention relates to the technical field of fermentation equipment, and discloses a fermentation equipment and a microbial fermentation process for prefabricated dishes. After a fermentation stage is completed, the present invention first discharges the fermentation liquid inside the fermentation outer cylinder through the drain port, and then drives each holding cage and the filter inner cylinder to rotate inside the fermentation inner cylinder through the rotation drive mechanism. At the same time, the pressing drive mechanism is used to drive each holding cage to contract in the vertical direction, so that the fermentation liquid inside each holding cage can be fully discharged under the combined action of centrifugal force and the pressure from top to bottom, and is output to the bottom end of the fermentation outer cylinder through the filter inner cylinder. Then, clear water is injected into the fermentation outer cylinder through a liquid pump to continue the next fermentation stage, so as to be able to empty the fermentation liquid more completely, slow down the fermentation process inside the fermentation equipment, avoid the growth of extra miscellaneous bacteria, avoid over-fermentation, reduce the accumulation of harmful substances inside the fermentation raw materials, and can more effectively ensure the flavor and safety of the fermented fermentation raw materials.

Description

Technical Field

[0001] The present invention relates to the technical field of fermentation equipment, and particularly to a fermentation equipment and a microbial fermentation process for prefabricated dishes. Background Art

[0002] Fermentation equipment is an important tool for realizing the microbial fermentation process. They can be divided into various types according to different structures and functions. Common fermentation equipment includes fermenters (fermentation kettles), fermentation tanks (fermentation tank vessels), fermentation towers (fermentation tower vessels), fermentation membrane boxes, and fermentation bags, etc. The basic principle of fermentation equipment is to provide an environment suitable for the growth and metabolism of microorganisms under the control of conditions such as temperature, pH value, oxygen content, and stirring. The main processes include the preparation of the fermentation medium, the inoculation of fermentation strains, the regulation of the fermentation process, and the separation and purification of the fermentation broth;

[0003] Prefabricated dishes refer to dishes that can be directly eaten or eaten after simple cooking through pre-treatment and processing. The application of fermentation technology in prefabricated dishes can improve the flavor, texture, and shelf life of the dishes, and at the same time increase certain beneficial microorganisms and metabolites, such as lactic acid bacteria and vitamins, etc. In the production process of prefabricated dishes, the metabolic action of microorganisms is used to process vegetables to improve their flavor, texture, and preservation. This technology is usually used to produce traditional fermented vegetable products such as pickled vegetables and kimchi.

[0004] In the fermentation process of prefabricated dishes, conventional prefabricated dish fermentation equipment mostly uses the method of stacking fermentation for fermentation. During the fermentation process, due to the stacking of prefabricated dishes, it is difficult to completely replace the fermentation water inside the prefabricated dishes. The long-term retention of the fermentation water inside the prefabricated dishes is likely to cause the growth of miscellaneous bacteria and the accumulation of harmful substances inside the prefabricated dishes, resulting in a decline in the fermentation safety of the prefabricated dishes. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a fermentation equipment and a microbial fermentation process for prefabricated dishes.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] A fermentation device, comprising a mounting bracket. Inside one side of the mounting bracket, a fermentation outer cylinder is fixedly arranged. Inside the mounting bracket and at the bottom of the fermentation outer cylinder, a liquid storage tank is arranged. Inside the fermentation outer cylinder, a filtering inner cylinder is arranged. Inside the filtering inner cylinder, a plurality of holding cages are arranged. At the top of the mounting bracket and on one side of the fermentation outer cylinder, a rotation driving mechanism and a pressing driving mechanism are arranged; Materials to be fermented can be placed inside each of the holding cages. The holding cages are stacked inside the filtering inner cylinder in sequence from bottom to top. Each of the holding cages can slide up and down inside the filtering inner cylinder, and each of the holding cages can expand and contract in the vertical direction; The liquid storage tank includes a clean water tank and a sewage tank. On one side of the top end of the fermentation outer cylinder, a water inlet is arranged. At the bottom end of the fermentation outer cylinder, a drain outlet is arranged. The clean water tank can supply clean water into the fermentation outer cylinder from the water inlet through a liquid pump. The fermentation liquid inside the fermentation inner cylinder can enter the sewage tank from the drain outlet; The liquid inside the fermentation outer cylinder can all pass through the filtering inner cylinder and each of the holding cages. The rotation driving mechanism is respectively connected and transmitted with each of the holding cages. The rotation of each of the holding cages can drive the filtering inner cylinder to rotate inside the fermentation inner cylinder. The pressing driving mechanism can generate pressure on the holding cage at the topmost layer, driving each of the holding cages to contract in the vertical direction.

[0008] Preferably, the holding cage includes a top layer plate and a bottom layer plate. At the bottom end of the top layer plate, a plurality of top layer sleeves are arranged. At the top end of the bottom layer plate, a plurality of bottom layer columns are arranged. Inside each of the top layer sleeves, a compression spring is arranged; At the bottom end of the top layer plate and inside each of the top layer sleeves, a top layer filter cylinder is arranged. At the top end of the bottom layer plate and inside each of the bottom layer columns, a bottom layer filter cylinder is arranged.

[0009] Preferably, each of the bottom layer columns can extend into one of the top layer sleeves, and the top end of the bottom layer column abuts against the bottom end of the compression spring. The bottom layer filter cylinder can extend into the top layer filter cylinder; After the combination of each holding cage, the bottom layer filter cylinder and the top layer filter cylinder always remain overlapping.

[0010] Preferably, the elastic coefficients and free lengths of the compression springs inside the same holding cage are all equal; In the direction from top to bottom inside the filtering inner cylinder, when the compression springs inside different holding cages are subjected to the same compression force, the elastic deformations generated by the compression springs inside different holding cages gradually decrease.

[0011] Preferably, the pressing drive mechanism includes a plurality of hydraulic telescopic rods and a pressing ring plate. The movable ends of the hydraulic telescopic rods are fixed to the pressing ring plate, and each of the hydraulic telescopic rods can penetrate into the interior of the fermentation outer cylinder from above the fermentation outer cylinder; during the downward movement of the pressing ring plate, it can contact the top plate of the topmost holding cage and generate pressure on each of the holding cages from top to bottom in sequence.

[0012] Preferably, the inner filtering cylinder includes a fixed outer frame and a plurality of filter meshes. Each of the filter meshes is fixedly arranged inside the fixed outer frame. The diameter of the fixed outer frame is smaller than the inner wall diameter of the fermentation outer cylinder, and there is a cavity between the fixed outer frame and the inner wall of the fermentation outer cylinder; a plurality of sliding grooves are formed in the inner wall of the fixed outer frame. A top limiting block is arranged on the outer side of each top plate, and each top limiting block can be embedded into one of the sliding grooves. A bottom limiting block is arranged on the outer side of each bottom plate, and each bottom limiting block can be embedded into one of the sliding grooves.

[0013] Preferably, the rotation drive mechanism includes a rotation drive motor and a drive shaft. The drive shaft can penetrate into the interior of the fermentation outer cylinder from above the fermentation outer cylinder; the drive shaft can penetrate through the top plate and the bottom plate of each holding cage respectively, and each top plate and each bottom plate can slide freely along the axis direction of the drive shaft on the outer side of the drive shaft; rotation can be transmitted between the drive shaft and each top plate and each bottom plate. The rotation drive motor can output rotation through the drive shaft and drive each holding cage and the inner filtering cylinder to rotate synchronously by limiting each top limiting block and each bottom limiting block through each sliding groove at the same time.

[0014] Preferably, a pneumatic balance mechanism is arranged at the top end of the mounting bracket. The pneumatic balance mechanism includes an air inlet pipe, an exhaust pipe and a water seal cylinder. The air inlet pipe and the exhaust pipe are respectively communicated with the top end of the fermentation outer cylinder; the top end of the water seal cylinder is open, a treatment agent is arranged inside the water seal cylinder, and the end of the exhaust pipe far away from the fermentation outer cylinder extends below the liquid level of the water seal cylinder. The gas discharged from the exhaust pipe can pass through the water seal cylinder and be discharged to the outside.

[0015] Preferably, a heating element is arranged inside the fermentation outer cylinder, and the heating element can heat the interior of the fermentation outer cylinder; a control terminal is also arranged at the top end of the mounting bracket. A pressure sensor and an acidity sensor are also arranged inside the fermentation inner cylinder. The control terminal is in signal connection with the pressure sensor and the acidity sensor, and can open the drain port, start and stop the liquid pump and open the exhaust pipe according to the air pressure detected by the pressure sensor and the acidity detected by the acidity sensor.

[0016] A prefabricated vegetable microbial fermentation process uses the above fermentation equipment and includes the following steps:

[0017] First, place the prefabricated vegetable raw materials to be fermented into multiple storage cages in sequence according to the capacity of the storage cages, and stack the storage cages on top of each other from bottom to top inside the filtering inner cylinder;

[0018] Then, inject clear water into the fermentation outer cylinder through a liquid pump, add a fermentation agent, and then seal the fermentation outer cylinder;

[0019] After a fermentation stage is completed, drain the fermentation liquid inside the fermentation outer cylinder through the drain port;

[0020] Drive each storage cage and the filtering inner cylinder to rotate inside the fermentation inner cylinder through a rotation drive mechanism, and drive each storage cage to contract vertically through a pressing drive mechanism to fully drain the fermentation liquid inside each storage cage;

[0021] Then, inject clear water into the fermentation outer cylinder through a liquid pump to continue the next fermentation stage;

[0022] Until after the last fermentation stage is completed, after fully draining the fermentation liquid inside each storage cage, open the fermentation outer cylinder to take out the prefabricated vegetable raw materials after fermentation.

[0023] Compared with the prior art, the present invention provides a fermentation equipment and a prefabricated vegetable microbial fermentation process, which have the following beneficial effects:

[0024] 1. In this fermentation equipment, during each fermentation stage, the inside of the fermentation outer cylinder is in a static state. After a fermentation stage is completed, first drain the fermentation liquid inside the fermentation outer cylinder through the drain port, and then drive each storage cage and the filtering inner cylinder to rotate inside the fermentation inner cylinder through a rotation drive mechanism. While rotating, drive each storage cage to contract vertically through a pressing drive mechanism, so that the fermentation liquid inside each storage cage can be fully drained under the combined action of centrifugal force and pressure from top to bottom, and is output to the bottom of the fermentation outer cylinder through the filtering inner cylinder and drained. Inject clear water into the fermentation outer cylinder through a liquid pump to continue the next fermentation stage, so as to be able to drain the fermentation liquid more completely, slow down the fermentation process inside the fermentation equipment, avoid the growth of additional miscellaneous bacteria, avoid over-fermentation, reduce the accumulation of harmful substances inside the fermentation raw materials, and can more effectively ensure the flavor and safety of the fermentation raw materials after fermentation.

[0025] 2. In this fermentation device, inside the filtering inner cylinder, the tops of the bottom columns are all kept inside the corresponding top sleeves, and there is always an overlap between the bottom filtering cylinder and the top filtering cylinder, so as to be able to confine the raw materials to be fermented inside the containing cages. Thus, when the movable ends of the hydraulic telescopic rods extend to drive the pressing ring plate to move downward, it can contact the top plate of the topmost containing cage, and generate pressure on each containing cage from top to bottom in sequence, so as to generate a pressing force on the raw materials to be fermented inside each containing cage. While avoiding the loss of the raw materials to be fermented, it can squeeze out the fermentation water carried by the raw materials to be fermented. And along the direction from top to bottom inside the filtering inner cylinder, when the compression springs inside different containing cages are under the same compression force, the elastic deformations generated by the compression springs inside different containing cages gradually decrease. Through the setting of different compression springs, under the increasing pressure from top to bottom in sequence, the same compression degree of each containing cage can be relatively maintained, and it can effectively prevent the raw materials inside the lower containing cages from being over-compressed, ensuring to avoid the situation of raw material breakage, etc.

[0026] 3. In this fermentation device, since the drive shaft can conduct rotation with each top plate and each bottom plate, and at the same time, since each top limiting block can be embedded inside a sliding groove and each bottom limiting block can be embedded inside a sliding groove, the rotary drive motor can output rotation through the drive shaft, and at the same time, through the limitation of each top limiting block and each bottom limiting block by each sliding groove, drive each containing cage and the filtering inner cylinder to rotate synchronously, so that each containing cage and the raw materials inside rotate synchronously. And through the cooperation of the centrifugal force generated by rotation and the pressing force of the pressing drive mechanism, the fermentation water carried by the raw materials can be fully squeezed out, effectively avoiding over-fermentation and reducing the accumulation of harmful substances inside the fermented raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 One of the three-dimensional structure diagrams of a fermentation device of the present invention;

[0028] Figure 2 Another three-dimensional structure diagram of a fermentation device of the present invention;

[0029] Figure 3 Three-dimensional structure diagram of the internal structure of the fermentation outer cylinder of a fermentation device of the present invention;

[0030] Figure 4 Assembly diagram of the internal structure of the fermentation outer cylinder of a fermentation device of the present invention;

[0031] Figure 5 Three-dimensional structure diagram of the filtering inner cylinder of a fermentation device of the present invention;

[0032] Figure 6 Schematic diagram of the three-dimensional structure of the storage cage of a fermentation device of the present invention;

[0033] Figure 7 Cross-sectional view of the storage cage of a fermentation device of the present invention;

[0034] Figure 8 Assembly schematic diagram of the storage cage of a fermentation device of the present invention.

[0035] In the figure: 1. Installation bracket; 2. Outer fermentation cylinder; 21. Water inlet; 22. Drain outlet; 3. Liquid storage tank; 31. Clean water tank; 32. Sewage tank; 33. Liquid pump; 4. Inner filter cylinder; 41. Fixed outer frame; 411. Sliding groove; 42. Filter net; 5. Storage cage; 51. Top plate; 511. Top sleeve; 512. Compression spring; 513. Top filter cylinder; 514. Top limit block; 52. Bottom plate; 521. Bottom column; 522. Bottom filter cylinder; 523. Bottom limit block; 6. Rotary drive mechanism; 61. Rotary drive motor; 62. Drive shaft; 7. Pressing drive mechanism; 71. Hydraulic telescopic rod; 72. Pressing ring plate; 8. Air pressure balance mechanism; 81. Air inlet pipe; 82. Exhaust pipe; 83. Water seal cylinder. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes a fermentation device and a prefabricated dish microbial fermentation process. Embodiment

[0038] Please refer to Figures 1 - 8, A fermentation device, comprising an installation bracket 1. On one side inside the installation bracket 1, a fermentation outer cylinder 2 is fixedly arranged. Inside the installation bracket 1 and at the bottom of the fermentation outer cylinder 2, a liquid storage tank 3 is arranged. Inside the fermentation outer cylinder 2, a filtering inner cylinder 4 is arranged. Inside the filtering inner cylinder 4, a number of holding cages 5 are arranged. At the top of the installation bracket 1 and on one side of the fermentation outer cylinder 2, a rotation driving mechanism 6 and a pressing driving mechanism 7 are arranged; Materials to be fermented can be placed inside each holding cage 5. The holding cages 5 are stacked inside the filtering inner cylinder 4 in sequence from bottom to top. Each holding cage 5 can slide up and down inside the filtering inner cylinder 4, and each holding cage 5 can expand and contract in the vertical direction; The liquid storage tank 3 includes a clean water tank 31 and a sewage tank 32. On one side at the top of the fermentation outer cylinder 2, a water inlet 21 is arranged. At the bottom of the fermentation outer cylinder 2, a drain outlet 22 is arranged. The clean water tank 31 can supply clean water into the fermentation outer cylinder 2 from the water inlet 21 through a liquid pump 33. The fermentation liquid inside the fermentation inner cylinder 2 can enter the sewage tank 32 from the drain outlet 22; The liquid inside the fermentation outer cylinder 2 can all pass through the filtering inner cylinder 4 and each holding cage 5. The rotation driving mechanism 6 is respectively connected and transmitted with each holding cage 5. The rotation of each holding cage 5 can drive the filtering inner cylinder 4 to rotate inside the fermentation inner cylinder 2. The pressing driving mechanism 7 can generate pressure on the holding cage 5 at the topmost position, driving each holding cage 5 to contract in the vertical direction.

[0039] During use, first, the raw materials to be fermented (in specific use, the raw materials to be fermented are solid materials, such as vegetables, fruits, etc.) are sequentially placed inside multiple holding cages 5 according to the capacity of the holding cages 5, and the holding cages 5 are stacked inside the filtering inner cylinder 4 in sequence from bottom to top; Then, clean water is injected into the fermentation outer cylinder 2 through the liquid pump 33, and a fermentation agent (a liquid or powder containing fermentation strains) is added. Then, the rotation driving mechanism 6 and the pressing driving mechanism 7 are sequentially installed, and the fermentation outer cylinder 2 is closed;

[0040] Inside this fermentation equipment, the fermentation process takes place between the fermenting agent and the raw materials to be fermented. The fermentation process of the raw materials to be fermented in each batch includes several fermentation stages (the number and duration of the fermentation stages are changed accordingly according to the actual fermenting agent and the type of materials, which is a common technical solution in the field and will not be elaborated here). During each fermentation stage, the inside of the fermentation outer cylinder 2 is in a static state. After a fermentation stage is completed, first, the fermentation liquid inside the fermentation outer cylinder 2 is discharged through the drain port 22. Then, the rotation drive mechanism 6 drives each holding cage 5 and the filter inner cylinder 4 to rotate inside the fermentation inner cylinder 2. While rotating, the pressing drive mechanism 7 drives each holding cage 5 to contract in the vertical direction, so that the fermentation liquid inside each holding cage 5 can be fully discharged under the combined action of centrifugal force and the pressure from top to bottom, and is output through the filter inner cylinder 4 to the bottom of the fermentation outer cylinder 2 for discharge. Clear water is injected into the fermentation outer cylinder 2 through the liquid pump 33 to continue the next fermentation stage, so as to be able to empty the fermentation liquid more completely, slow down the fermentation process inside the fermentation equipment, avoid the growth of extra miscellaneous bacteria, avoid over-fermentation, reduce the accumulation of harmful substances inside the fermentation raw materials, and can more effectively ensure the flavor and safety of the fermented raw materials. Until after the last fermentation stage is completed, after the fermentation liquid inside each holding cage 5 is fully discharged, the fermentation outer cylinder 2 is opened to take out the fermented raw materials, and the fermentation process of the raw materials in this batch is completed. Embodiment

[0041] Please refer to Figures 1 - 4 、 Figures 6 - 8 , which is different from the above embodiment in that the holding cage 5 includes a top plate 51 and a bottom plate 52. A plurality of top sleeves 511 are provided at the bottom end of the top plate 51, and a plurality of bottom columns 521 are provided at the top end of the bottom plate 52. A compression spring 512 is provided inside each top sleeve 511; a top filter cylinder 513 is provided at the bottom end of the top plate 51 and inside each top sleeve 511, and a bottom filter cylinder 522 is provided at the top end of the bottom plate 52 and inside each bottom column 521.

[0042] Each bottom column 521 can extend into a top sleeve 511, and the top end of the bottom column 521 abuts against the bottom end of the compression spring 512. The bottom filter cylinder 522 can extend into the top filter cylinder 513; after each holding cage 5 is combined, the bottom filter cylinder 522 and the top filter cylinder 513 always overlap.

[0043] The elastic coefficients and free lengths of the compression springs 512 inside the same holding cage 5 are equal; in the vertical direction inside the filter inner cylinder 4, when the compression springs 512 inside different holding cages 5 are subjected to the same compression force, the elastic deformations generated by the compression springs 512 inside different holding cages 5 gradually decrease.

[0044] The pressing drive mechanism 7 includes a plurality of hydraulic telescopic rods 71 and a pressing ring plate 72. The movable ends of the hydraulic telescopic rods 71 are all fixed to the pressing ring plate 72, and each hydraulic telescopic rod 71 can penetrate into the interior of the fermentation outer cylinder 2 from above the fermentation outer cylinder 2; during the downward movement of the pressing ring plate 72, it can contact the top plate 51 of the topmost holding cage 5 and generate pressure on each holding cage 5 in sequence from top to bottom.

[0045] During use, through the setting of the holding cages 5, after each holding cage 5 is combined, each bottom column 521 can extend into a top sleeve 511, and the top end of the bottom column 521 abuts against the bottom end of the compression spring 512. The bottom filter cylinder 522 can extend into the top filter cylinder 513, and inside the filter inner cylinder 4, the top ends of the bottom columns 521 are all kept inside the corresponding top sleeves 511, and the bottom filter cylinder 522 and the top filter cylinder 513 always overlap, so as to be able to confine the raw materials to be fermented inside the holding cages 5. Thus, under the drive of the elongation of the movable ends of the hydraulic telescopic rods 71, during the downward movement of the pressing ring plate 72, it contacts the top plate 51 of the topmost holding cage 5 and generates pressure on each holding cage 5 in sequence from top to bottom, so as to be able to generate a pressing force on the raw materials to be fermented inside each holding cage 5, and while avoiding the loss of the raw materials to be fermented, squeeze out the fermentation water carried by the raw materials to be fermented. And through the compression springs 512 located in different holding cages 5 along the up-and-down direction inside the filter inner cylinder 4, when the same compression force is applied, the elastic deformations generated by the compression springs 512 located in different holding cages 5 gradually decrease. And through the setting of different compression springs 512, under the sequentially increasing pressure from top to bottom, the same compression degree of each holding cage 5 can be relatively maintained, and it can effectively prevent the raw materials inside the lower holding cages 5 from being over-compressed, ensuring the avoidance of situations such as the breaking of the raw materials. Embodiment

[0046] Please refer to Figures 1 - 8 The difference from the above embodiment is that the filter inner cylinder 4 includes a fixed outer frame 41 and a plurality of filter meshes 42. Each filter mesh 42 is fixedly arranged inside the fixed outer frame 41. The diameter of the fixed outer frame 41 is smaller than the inner wall diameter of the fermentation outer cylinder 2, and there is a cavity between the fixed outer frame 41 and the inner wall of the fermentation outer cylinder 2; a plurality of sliding grooves 411 are opened on the inner wall of the fixed outer frame 41. Top limiting blocks 514 are arranged on the outer sides of the top plates 51, and each top limiting block 514 can be embedded inside a sliding groove 411. Bottom limiting blocks 523 are arranged on the outer sides of the bottom plates 52, and each bottom limiting block 523 can be embedded inside a sliding groove 411.

[0047] The rotation drive mechanism 6 includes a rotation drive motor 61 and a drive shaft 62. The drive shaft 62 can penetrate into the interior of the fermentation outer cylinder 2 from above the fermentation outer cylinder 2. The drive shaft 62 can penetrate through the top plate 51 and the bottom plate 52 of each holding cage 5 respectively, and each top plate 51 and each bottom plate 52 can freely slide along the axis direction of the drive shaft 62 on the outside of the drive shaft 62. Rotation can be transmitted between the drive shaft 62 and each top plate 51 and each bottom plate 52. The rotation drive motor 61 can output rotation through the drive shaft 62, and at the same time, through the limitation of each top limiting block 514 and each bottom limiting block 523 by each sliding groove 411, drive each holding cage 5 and the filter inner cylinder 4 to rotate synchronously.

[0048] During use, since the drive shaft 62 can penetrate through the top plate 51 and the bottom plate 52 of each holding cage 5 respectively, and each top plate 51 and each bottom plate 52 can freely slide along the axis direction of the drive shaft 62 on the outside of the drive shaft 62. Rotation can be transmitted between the drive shaft 62 and each top plate 51 and each bottom plate 52. At the same time, since a number of sliding grooves 411 are provided on the inner wall of the fixed outer frame 41, a top limiting block 514 is provided on the outside of each top plate 51, and each top limiting block 514 can be embedded into the interior of a sliding groove 411. A bottom limiting block 523 is provided on the outside of each bottom plate 52, and each bottom limiting block 523 can be embedded into the interior of a sliding groove 411. This enables the rotation drive motor 61 to output rotation through the drive shaft 62, and at the same time, through the limitation of each top limiting block 514 and each bottom limiting block 523 by each sliding groove 411, drive each holding cage 5 and the filter inner cylinder 4 to rotate synchronously, so that each holding cage 5 and the raw materials inside rotate synchronously, and through the centrifugal force generated by the rotation and the pressing force of the pressing drive mechanism 7, the fermentation water carried by the raw materials can be fully squeezed out, effectively avoiding over-fermentation and reducing the accumulation of harmful substances inside the fermented raw materials.

[0049] An air pressure balancing mechanism 8 is provided at the top end of the mounting bracket 1. The air pressure balancing mechanism 8 includes an air inlet pipe 81, an exhaust pipe 82, and a water seal cylinder 83. The air inlet pipe 81 and the exhaust pipe 82 are respectively communicated with the top end of the fermentation outer cylinder 2. The top end of the water seal cylinder 83 is open, a treatment agent is provided inside the water seal cylinder 83, and the end of the exhaust pipe 82 away from the fermentation outer cylinder 2 extends below the liquid level of the water seal cylinder 83. The gas discharged from the exhaust pipe 82 can pass through the water seal cylinder 83 and be discharged to the outside.

[0050] During use, through the setting of the air pressure balance mechanism 8, one-way valves are provided in both the air inlet pipe 81 (in actual use, the air inlet pipe 81 can be connected to an independent air supply device) and the exhaust pipe 82, so as to be able to intake and exhaust air respectively. When exhausting, through the setting of the water seal cylinder 83, the end of the exhaust pipe 82 away from the fermentation outer cylinder 2 extends below the liquid level of the water seal cylinder 83, so as to be able to prevent air intake through the exhaust pipe 82 through the water seal cylinder 83, and at the same time, through the treatment agent provided inside the water seal cylinder 83, the exhausted gas can be treated (the treatment agent is the corresponding treatment liquid for the gas generated by the corresponding fermentation raw materials and fermentation agents), and the emission of polluted gas can be avoided.

[0051] A heating element is provided inside the fermentation outer cylinder 2, and the heating element can heat the inside of the fermentation outer cylinder 2; a control terminal is also provided at the top of the mounting bracket 1, and a pressure sensor and an acidity sensor are also provided inside the fermentation inner cylinder 2. The control terminal is signal-connected to the pressure sensor and the acidity sensor, and can open the drain port 22, start and stop the liquid pump 33, and open the exhaust pipe 82 according to the air pressure detected by the pressure sensor and the acidity detected by the acidity sensor.

[0052] In specific use, the detection technologies of the pressure sensor and the acidity sensor are common technical solutions in the prior art. According to the air pressure detected by the pressure sensor and the acidity detected by the acidity sensor (the corresponding thresholds are common thresholds in the prior art, such as 1.5 MPa and a pH value less than 3.5), the means of opening the drain port 22, starting and stopping the liquid pump 33, and opening the exhaust pipe 82 are common solutions in the prior art, and the corresponding fermentation process can be controlled. Embodiment

[0053] A prefabricated vegetable microbial fermentation process uses a fermentation device according to any one of Embodiment 1 - Embodiment 3, and includes the following steps:

[0054] First, the prefabricated vegetable raw materials to be fermented are sequentially placed into a plurality of holding cages 5 according to the capacity of the holding cages 5, and the holding cages 5 are stacked on top of each other from bottom to top inside the filter inner cylinder 4;

[0055] Then, water is injected into the fermentation outer cylinder 2 through the liquid pump 33, and a fermentation agent is added, and then the fermentation outer cylinder 2 is sealed;

[0056] After a fermentation stage is completed, the fermentation liquid inside the fermentation outer cylinder 2 is discharged through the drain port 22;

[0057] The rotation drive mechanism 6 drives each holding cage 5 and the filter inner cylinder 4 to rotate inside the fermentation inner cylinder 2, and the pressing drive mechanism 7 drives each holding cage 5 to contract in the vertical direction to fully discharge the fermentation liquid inside each holding cage 5;

[0058] Then, clean water is injected into the interior of the fermentation outer cylinder 2 through the liquid pump 33 to continue the next fermentation stage;

[0059] After the last fermentation stage is completed, after the fermentation broth in each holding cage 5 is fully discharged, the fermentation outer cylinder 2 is opened to take out the prefabricated vegetable raw materials after fermentation.

[0060] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fermentation device, characterized in that: It includes an installation bracket. On one side inside the installation bracket, a fermentation outer cylinder is fixedly arranged. Inside the installation bracket and at the bottom of the fermentation outer cylinder, a liquid storage tank is provided. Inside the fermentation outer cylinder, a filtering inner cylinder is arranged. Inside the filtering inner cylinder, a number of holding cages are arranged. On the top of the installation bracket and on one side of the fermentation outer cylinder, a rotation driving mechanism and a pressing driving mechanism are provided; In each holding cage, materials to be fermented can be placed. The holding cages are stacked inside the filtering inner cylinder in sequence from bottom to top. Each holding cage can slide up and down inside the filtering inner cylinder, and each holding cage can expand and contract in the vertical direction; The liquid storage tank includes a clean water tank and a sewage tank. On one side at the top of the fermentation outer cylinder, a water inlet is provided. At the bottom of the fermentation outer cylinder, a drain outlet is provided. The clean water in the clean water tank can be supplied into the fermentation outer cylinder through a liquid pump from the water inlet, and the fermentation liquid inside the fermentation inner cylinder can enter the sewage tank from the drain outlet; The liquid inside the fermentation outer cylinder can all pass through the filtering inner cylinder and each holding cage. The rotation driving mechanism is respectively connected and driven with each holding cage. The rotation of each holding cage can drive the filtering inner cylinder to rotate inside the fermentation inner cylinder. The pressing driving mechanism can generate pressure on the holding cage at the topmost part, driving each holding cage to contract in the vertical direction, and can fully discharge the fermentation liquid inside each holding cage under the combined action of centrifugal force and the pressure from top to bottom; The holding cage includes a top layer plate and a bottom layer plate. At the bottom end of the top layer plate, a number of top layer sleeves are arranged. At the top end of the bottom layer plate, a number of bottom layer columns are arranged. Inside each top layer sleeve, a compression spring is arranged; At the bottom end of the top layer plate and inside each top layer sleeve, a top layer filtering cylinder is arranged. At the top end of the bottom layer plate and inside each bottom layer column, a bottom layer filtering cylinder is arranged; Each bottom layer column can extend into a top layer sleeve, and the top end of the bottom layer column abuts against the bottom end of the compression spring. The bottom layer filtering cylinder can extend into the top layer filtering cylinder; After each holding cage is combined, the bottom layer filtering cylinder and the top layer filtering cylinder always remain overlapped; 2. A fermentation device according to claim 1, characterized in that: The elastic coefficients and free lengths of the compression springs inside the same holding cage are all equal; Inside the filtering inner cylinder in the direction from top to bottom, when the compression springs inside different holding cages are under the same compression force, the elastic deformations generated by the compression springs inside different holding cages gradually decrease; 3. A fermentation device according to claim 2, characterized in that: The pressing driving mechanism includes a number of hydraulic telescopic rods and a pressing ring plate. The movable ends of each hydraulic telescopic rod are fixed to the pressing ring plate, and each hydraulic telescopic rod can penetrate into the inside of the fermentation outer cylinder from above the fermentation outer cylinder; During the downward movement of the pressing ring plate, it can contact the top layer plate of the holding cage at the topmost part and generate pressure on each holding cage in sequence from top to bottom; 4. A fermentation device according to claim 3, characterized in that: The filtering inner cylinder includes a fixed outer frame and a number of filter meshes. Each filter mesh is fixedly arranged inside the fixed outer frame. The diameter of the fixed outer frame is smaller than the inner wall diameter of the fermentation outer cylinder, and there is a cavity between the fixed outer frame and the inner wall of the fermentation outer cylinder; A plurality of sliding grooves are formed in the inner wall of the fixed outer frame. Top layer limit blocks are arranged on the outer sides of all the top layer plates, and each top layer limit block can be embedded into one of the sliding grooves. Bottom layer limit blocks are arranged on the outer sides of all the bottom layer plates, and each bottom layer limit block can be embedded into one of the sliding grooves.

5. A fermentation device according to claim 4, characterized in that: The rotation driving mechanism includes a rotation driving motor and a driving shaft. The driving shaft can penetrate into the interior of the fermentation outer cylinder from above the fermentation outer cylinder. The driving shaft can penetrate through the top layer plates and the bottom layer plates of each holding cage respectively, and each top layer plate and each bottom layer plate can slide freely along the axis direction of the driving shaft on the outer side of the driving shaft. Rotation can be transmitted between the driving shaft and each top layer plate and each bottom layer plate. The rotation driving motor can output rotation through the driving shaft, and at the same time, through the limitation of each top layer limit block and each bottom layer limit block by each sliding groove, drive each holding cage and the filter inner cylinder to rotate synchronously.

6. A fermentation device according to claim 5, characterized in that: A pneumatic balance mechanism is arranged at the top end of the installation bracket. The pneumatic balance mechanism includes an air inlet pipe, an exhaust pipe and a water seal cylinder. The air inlet pipe and the exhaust pipe are respectively communicated with the top end of the fermentation outer cylinder. The top end of the water seal cylinder is open. A treatment agent is arranged inside the water seal cylinder. One end of the exhaust pipe away from the fermentation outer cylinder extends below the liquid level of the water seal cylinder, and the gas discharged from the exhaust pipe can pass through the water seal cylinder and be discharged to the outside.

7. A fermentation device according to claim 6, characterized in that: A heating element is arranged inside the fermentation outer cylinder, and the heating element can heat the interior of the fermentation outer cylinder. A control terminal is also arranged at the top end of the installation bracket. A pressure sensor and an acidity sensor are also arranged inside the fermentation inner cylinder. The control terminal is signal-connected to the pressure sensor and the acidity sensor, and can open the drain port, start and stop the liquid pump and open the exhaust pipe according to the air pressure detected by the pressure sensor and the acidity detected by the acidity sensor.

8. A microbial fermentation process for prefabricated dishes, characterized in that, When using a fermentation device according to any one of claims 1-7, the following steps are included: First, place the prefabricated vegetable raw materials to be fermented into multiple holding cages in sequence according to the capacity of the holding cages, and stack the holding cages on top of each other from bottom to top inside the filter inner cylinder. Then, inject clear water into the fermentation outer cylinder through the liquid pump, add a fermentation agent, and then seal the fermentation outer cylinder. After a fermentation stage is completed, drain the fermentation liquid inside the fermentation outer cylinder through the drain port. Drive each holding cage and the filter inner cylinder to rotate inside the fermentation inner cylinder through the rotation driving mechanism, and drive each holding cage to contract in the vertical direction through the pressing driving mechanism to fully drain the fermentation liquid inside each holding cage. Then, inject clear water into the fermentation outer cylinder through the liquid pump to continue the next fermentation stage. Until after the last fermentation stage is completed, after fully draining the fermentation liquid inside each holding cage, open the fermentation outer cylinder and take out the prefabricated vegetable raw materials after fermentation.

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