Microbial fermentation equipment for food

Abstract

The invention discloses food microbial fermentation equipment, and relates to the technical field of microbial fermentation, the food microbial fermentation equipment comprises a mounting rack, an outer shell is arranged on the mounting rack, a feed pipe and a discharge pipe are arranged on the outer shell, a feed valve and a discharge valve are respectively mounted on the feed pipe and the discharge pipe, and a heater and an inner shell are also mounted in the outer shell; the top and the bottom of the inner shell communicate with the feeding pipe and the discharging pipe correspondingly, an opening is formed in the side portion of the inner shell, a rotating assembly is arranged at the position of the opening, and a driving assembly is arranged on the rotating assembly. A flow guide assembly is arranged on the driving assembly and is communicated with two groups of stirring assemblies; the two stirring assemblies are located in the inner shell and connected with the driving assembly, and heating plates are arranged on the two stirring assemblies. The device is high in functionality, can promote full contact between microorganisms and materials, ensures that the materials at all positions can be uniformly heated in the fermentation process, reduces the phenomenon of inconsistent product quality caused by temperature difference, and has high use value.

Description

Technical Field

[0001] The present invention relates to the technical field of microbial fermentation, and more particularly to a device for food microbial fermentation. Background Art

[0002] Microbial fermentation refers to the process of using microorganisms to convert raw materials into products required by humans through specific metabolic pathways under suitable conditions. The production level of microbial fermentation mainly depends on the genetic characteristics of the strain itself and the culture conditions.

[0003] The internal temperature of a food microbial fermentation device is particularly important for the fermentation of microorganisms during operation. In traditional food microbial fermentation devices, the internal heating temperature is uneven, and heating is only achieved by heaters attached to the outside of the fermentation tank, resulting in inconsistent local heating of the materials inside the fermentation tank during the fermentation process and causing insufficient fermentation. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems raised in the above background art, and then a device for food microbial fermentation is proposed.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] A device for food microbial fermentation includes a mounting frame, on which an outer housing is provided. The outer housing is provided with a feed pipe and a discharge pipe, and a feed valve and a discharge valve are respectively installed on the feed pipe and the discharge pipe. A heater and an inner housing are also installed inside the outer housing; the top and bottom of the inner housing are respectively connected to the feed pipe and the discharge pipe, and an opening is provided on the side of the inner housing. A rotating assembly is provided at the opening position, and a driving assembly is provided on the rotating assembly to enable the driving assembly to perform a horizontal rotation action; a guiding assembly is provided on the driving assembly, and the guiding assembly is connected to two stirring assemblies to enable the two stirring assemblies to simultaneously eject fluid; the two stirring assemblies are inside the inner housing and are connected to the driving assembly to enable the two stirring assemblies to perform a reciprocating action of approaching or moving away from each other, and heating plates are provided on both of the two stirring assemblies.

[0007] Furthermore, the guiding assembly is connected to an external cold source, so that the cold source cooperates with the heater and the heating plates to finely adjust the temperature inside the inner housing when cooling.

[0008] Furthermore, the guiding assembly is connected to an external liquid source, so that the liquid source cooperates with the stirring assemblies to fully flush and spray the inside of the inner housing during cleaning.

[0009] Furthermore, the rotating assembly includes rotating plates. There are two rotating plates, which are respectively rotatably arranged at the two opening positions, and one of the rotating plates is connected to a rotating motor arranged inside the outer housing, and the driving assembly is arranged on the rotating plate.

[0010] Further, the driving assembly includes a bidirectional lead screw rotatably arranged inside the inner housing with one end extending outside the inner housing and connected to a driving motor. The driving motor performs reciprocating alternating rotational movements of forward rotation and reverse rotation. A guide tube is provided on one side of the bidirectional lead screw. One end of the guide tube extends outside the inner housing. The diversion assembly is communicated with the guide tube, and two groups of stirring assemblies cooperate with the guide tube and the bidirectional lead screw.

[0011] Further, the diversion assembly includes a connection box. One side of the connection box is communicated with the guide tube, and the other side is communicated with a rotating tube. The rotating tube is rotatably arranged on the outer housing and is provided with a diversion valve thereon. The end of the rotating tube extends outside the outer housing and is connected with a rotating joint. A cold source and / or a liquid source are connected with the rotating joint. The guide tube is communicated with the stirring assembly through a hose.

[0012] Further, the stirring assembly includes a moving box. The moving box is fitted to the bidirectional lead screw and the guide tube and is communicated with the hose. A plurality of stirring tubes are communicated with the moving box. A plurality of perforations for ejecting fluid are provided on the plurality of stirring tubes. A heating plate is connected to the stirring tubes.

[0013] Further, the plurality of stirring tubes form a spiral structure.

[0014] Further, the stirring assembly further includes a fixed seat arranged inside the stirring tube. A push rod is slidably arranged on the fixed seat. The inner end of the push rod is connected with a piston. The outer end of the push rod is connected with the heating plate. A spring is sleeved outside the push rod and is located between the fixed seat and the piston. When the piston is impacted by the fluid, the push rod extends outwards to drive the heating plate to approach the inner wall of the inner housing.

[0015] Further, a scraping plate in contact with the inner wall of the outer housing is provided on the outer side of the heating plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In the present invention, the driving assembly realizes the horizontal rotation movement through the rotating assembly, drives the stirring assembly to perform a circular motion inside the inner housing, and at the same time, the two groups of stirring assemblies can also perform reciprocating movements of approaching or separating from each other. This complex movement mode enables the stirring assembly to fully cover the internal space of the inner housing, stir and mix the materials more fully and evenly, promote the full contact between microorganisms and the materials, and improve the uniformity and efficiency of fermentation. At the same time, the heating plate on the stirring assembly can heat along multiple directions inside the inner housing as the stirring assembly moves, ensuring that the materials at all positions inside the inner housing are evenly heated, effectively avoiding the problem of uneven local temperature, providing a stable and suitable growth environment for microorganisms, being beneficial to improving the quality and stability of fermentation products, and reducing the phenomenon of inconsistent product quality caused by temperature differences.

[0018] 2. In the present invention, the diversion assembly can guide the fluid to two sets of stirring assemblies and make them eject the fluid simultaneously. According to the requirements of the fermentation process, functions such as introducing the gas required for fermentation, adding nutrients, or performing cleaning can be flexibly realized, enhancing the versatility and adaptability of the equipment, and being able to meet the diverse needs of different types of food microorganism fermentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic connection diagram of the cold source and the liquid source;

[0021] Figure 3 is Figure 1 a partially enlarged schematic diagram of A in

[0022] Figure 4 is Figure 1 a partially enlarged schematic diagram of B in

[0023] Figure 5 is a three-dimensional structural schematic diagram of the connection box;

[0024] Figure 6 is Figure 1 a partially enlarged schematic diagram of C in

[0025] Figure 7 is a three-dimensional structural schematic diagram of the moving box;

[0026] Figure 8 is a schematic diagram of the installation position of the piston;

[0027] Wherein: 1, mounting frame; 2, outer housing; 21, feed pipe; 22, discharge pipe; 23, feed valve; 24, discharge valve; 3, heater; 4, inner housing; 41, opening; 5, rotating assembly; 51, rotating plate; 52, rotating motor; 6, driving assembly; 61, bidirectional lead screw; 62, driving motor; 63, guide pipe; 7, diversion assembly; 71, connection box; 72, rotating pipe; 73, diversion valve; 74, rotating joint; 75, hose; 8, stirring assembly; 81, moving box; 82, stirring pipe; 821, perforation; 83, fixed seat; 84, push rod; 85, piston; 86, spring; 9, heating plate; 91, scraper. DETAILED DESCRIPTION OF THE INVENTION

[0028] 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all 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. The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0029] Referring to the attached Figure 1 As shown, a food microbial fermentation device includes a mounting frame 1. A housing 2 is provided on the mounting frame 1. A feed pipe 21 and a discharge pipe 22 are provided on the housing 2. A feed valve 23 and a discharge valve 24 are respectively installed on the feed pipe 21 and the discharge pipe 22. A heater 3 and an inner housing 4 are also installed inside the housing 2. Among them, the top and bottom of the inner housing 4 are respectively communicated with the feed pipe 21 and the discharge pipe 22. An opening 41 is provided on the side of the inner housing 4. A rotating assembly 5 is provided at the position of the opening 41. A driving assembly 6 is provided on the rotating assembly 5 so that the driving assembly 6 can perform a horizontal rotation action. A guiding assembly 7 is provided on the driving assembly 6. The guiding assembly 7 is communicated with two stirring assemblies 8 so that the two stirring assemblies 8 can simultaneously eject fluid. The two stirring assemblies 8 are located inside the inner housing 4 and are connected to the driving assembly 6 so that the two stirring assemblies 8 can perform a reciprocating action of approaching or moving away from each other. Heating plates 9 are provided on both of the two stirring assemblies 8.

[0030] In the specific implementation process of the present invention, it is mainly used for microbial culture and fermentation. By controlling the temperature during the microbial culture and fermentation process, the microorganisms are heated sufficiently. The fermentation equipment is supported by the mounting frame 1, and the outer shell 2 is fixed on the mounting frame 1. The outer shell 2 serves as the external protection structure of the equipment, and the feed pipe 21 and the discharge pipe 22 are arranged thereon, which are respectively used for inputting the material to be fermented and discharging the fermented product. At the same time, the feed valve 23 and the discharge valve 24 are installed on the feed pipe 21 and the discharge pipe 22 to control the entry and exit of the material. The heater 3 and the inner shell 4 are installed inside the outer shell 2. The heater 3 provides the heat source for the entire equipment and is used to maintain and adjust the temperature environment required for fermentation. The inner shell 4 is the core space for fermentation. Its top is connected to the feed pipe 21 to ensure that the material can smoothly enter the inner shell 4 for fermentation, and its bottom is connected to the discharge pipe 22 to facilitate the discharge of the product after fermentation. An opening 41 is provided on the side of the inner shell 4, and a rotating assembly 5 is installed at the position of the opening 41. The driving assembly 6 is carried on the rotating assembly 5, so that the driving assembly 6 can perform a horizontal rotation action. This action enables the connected stirring assembly 8 to perform a circular motion in the horizontal direction inside the inner shell 4, providing a motion basis for subsequent operations such as stirring and heating. The guiding assembly 7 is installed on the driving assembly 6. The guiding assembly 7 communicates with the two stirring assemblies 8. When the equipment is running, the guiding assembly 7 can guide the fluid to the two stirring assemblies 8 and make them spray out simultaneously to achieve the corresponding functions. The two stirring assemblies 8 are located inside the inner shell 4 and are connected to the driving assembly 6. Under the action of the driving assembly 6, the two stirring assemblies 8 can perform reciprocating actions of approaching or moving away from each other. Through this change in action, more comprehensive and effective stirring and mixing of the material can be achieved. Heating plates 9 are installed on the two stirring assemblies 8. Since the stirring assembly 8 can perform horizontal rotation and reciprocating actions of approaching or moving away from each other, the heating plates 9 can heat in multiple directions inside the inner shell 4, ensuring that the materials at all positions inside the inner shell 4 are evenly heated and avoiding the occurrence of uneven local temperature.

[0031] For the above solution, refer to the attached Figure 2As shown, in one embodiment, the flow guiding assembly 7 is connected to an external cold source so that the cold source cooperates with the heater 3 and the heating plate 9, and can finely adjust the temperature inside the inner housing 4 during cooling, avoiding the problem of difficult temperature adjustment caused by a large one-time temperature difference. During the implementation process, when cooling is required, the cold air provided by the external cold source cooperates with the functions of the heater 3 and the heating plate 9. On the one hand, the cold air can neutralize the excess heat generated by the heater 3 to avoid too high a temperature. On the other hand, since the cold air is finely ejected through the stirring assembly 8, compared with the traditional one-time large-scale cooling method, it can more accurately control the cooling range and speed, avoiding the problem of difficult temperature adjustment caused by a large one-time temperature difference (for example, in the process of microbial fermentation, if the temperature rises too fast, simply turning off the heater 3 may not be able to cool down quickly and effectively. At this time, starting the external cold source, and ejecting cold air through the flow guiding assembly 7 and the stirring assembly 8 can quickly and finely reduce the temperature, keeping the temperature inside the inner housing 4 within the range suitable for the growth and fermentation of microorganisms).

[0032] Refer to the attached Figure 2 As shown, in another embodiment, the flow guiding assembly 7 is connected to an external liquid source so that the liquid source cooperates with the stirring assembly 8, and can fully flush and spray the inside of the inner housing 4 during cleaning. During the implementation process, when the cleaning process is started, the water from the external liquid source flows into the flow guiding assembly 7. With its special structural design, the flow guiding assembly 7 guides the water orderly to the two groups of stirring assemblies 8 connected to it. The stirring assembly 8 is connected to the flow guiding assembly 7 to receive the water flow on the one hand, and on the other hand, under the action of the driving assembly 6, it can perform horizontal rotation movements and move closer to or away from each other. When cleaning the inside of the inner housing 4, these movements of the stirring assembly 8 enable the ejected water to cover different positions of the inner housing 4, and the water flushes the inside of the inner housing 4 from different angles and positions. After a period of flushing and spraying, it can effectively remove the residual materials, microorganisms and other dirt inside the inner housing 4, ensure the cleanliness of the equipment interior, provide a good environment for the next food microbial fermentation, and further reduce the influence of the dirt inside the inner housing 4 on the temperature during the fermentation process, improving the accuracy of temperature control during the fermentation process.

[0033] It is worth noting that in other embodiments, the flow guiding assembly 7 can also be connected to the gas required for fermentation and the nutrient addition source. In this regard, the present invention does not make any restrictions. By connecting different sources, different functions can be achieved.

[0034] For the above solution, specifically, refer to the attached Figure 3As shown, the rotating assembly 5 includes rotating plates 51. There are two rotating plates 51, which are respectively rotatably arranged at the positions of the two openings 41. One of the rotating plates 51 is connected to a rotating motor 52 arranged inside the outer housing 2. The driving assembly 6 is arranged on the rotating plate 51, so that when the rotating motor 52 operates, the rotating plate 51 rotates. As the rotating plate 51 rotates, the driving assembly 6 will also perform a horizontal rotation movement together; among them, by controlling the frequency conversion movement and intermittent rotation at different speeds of the rotating motor 52, according to different stages of food microbial fermentation and specific process requirements, operations such as stirring and mixing inside the fermentation equipment can be flexibly and precisely controlled, creating good conditions for microbial fermentation, and helping to improve the stability of the fermentation process and the consistency of products (for example, in the initial stage of fermentation, the rotating motor 52 needs to rotate intermittently at a lower speed to slowly mix the fermentation materials and avoid damaging the microorganisms due to excessive stirring; in the middle stage of fermentation, as the microorganisms grow and metabolize, the rotating motor 52 needs to rotate intermittently at a higher speed to strengthen the mixing and mass transfer of the materials and promote the full contact between the microorganisms and nutrients; in the later stage of fermentation, the rotating speed of the rotating motor 52 needs to be reduced and the rotation time needs to be shortened to avoid damaging the fermentation products); by setting different intermittent rotation modes, that is, controlling the rotation time and stop time interval of the rotating motor 52, various complex process requirements during the fermentation process can be simulated, providing the most suitable growth environment for the microorganisms, and improving the fermentation efficiency and product quality.

[0035] For the above solution, specifically, referring to the attached Figure 4 As shown, the driving assembly 6 includes a bidirectional lead screw 61. The bidirectional lead screw 61 is rotatably arranged inside the inner housing 4 and one end extends to the outside of the inner housing 4 and is connected to a driving motor 62. The driving motor 62 performs a reciprocating alternating rotation movement of forward rotation and reverse rotation. One side of the bidirectional lead screw 61 is provided with a guide tube 63. One end of the guide tube 63 extends to the outside of the inner housing 4. The diversion assembly 7 is communicated with the guide tube 63. Two groups of stirring assemblies 8 are matched with the guide tube 63 and the bidirectional lead screw 61; during the implementation process, the two groups of stirring assemblies 8 are matched with the guide tube 63 and the bidirectional lead screw 61 to realize the functions of stirring and fluid transportation. When the bidirectional lead screw 61 rotates, the stirring assemblies 8 move in the horizontal direction. At the same time, the fluid in the diversion assembly 7 is input into the two groups of stirring assemblies 8, and the stirring assemblies 8 evenly distribute the fluid to each part inside the inner housing 4. In this way, the stirring assemblies 8 can not only mix the fermentation materials evenly through their own stirring action, but also realize functions such as temperature adjustment and cleaning inside the inner housing; and through the synchronous reciprocating movement and stirring of the two groups of stirring assemblies 8 from the middle to both ends, the entire cross-sectional area of the inner housing 4 can be effectively covered, making the material mixing more sufficient, so that the heating plate 9 can act on more points.

[0036] For the above solution, specifically, referring to the attached Figure 4 and the attached Figure 5As shown, the diversion assembly 7 includes a connection box 71. One side of the connection box 71 is connected to the guide pipe 63, and the other side is connected to a rotating pipe 72. The rotating pipe 72 is rotatably arranged on the outer housing 2 and is provided with a diversion valve 73 thereon. The end of the rotating pipe 72 extends to the outside of the outer housing 2 and is connected to a rotating joint 74. The cold source and / or liquid source is connected to the rotating joint 74. The guide pipe 63 is connected to the stirring assembly 8 through a hose 75. During the implementation process, when a cold source or liquid source needs to be introduced during the fermentation process, the external cold source or liquid source transports the fluid into the rotating pipe 72 through the rotating joint 74. The diversion valve 73 precisely controls the fluid flow according to the process requirements. The rotating pipe 72 enables the fluid to be transported to the guide pipe 63 through the connection box 71. The guide pipe 63 is connected to the stirring assembly 8 through the hose 75, and finally the fluid enters the stirring assembly 8, enabling the stirring assembly 8 to evenly distribute the fluid into the inner housing 4 during the movement process, realizing the precise control and optimization of the fermentation environment.

[0037] For the above solution, specifically, refer to the attached Figure 6 and the attached Figure 7 As shown, the stirring assembly 8 includes a moving box 81. The moving box 81 is fitted to the bidirectional lead screw 61 and the guide pipe 63 and is connected to the hose 75. The moving box 81 is connected to multiple stirring pipes 82. The multiple stirring pipes 82 are provided with perforations 821 for ejecting fluid. The heating plate 9 is connected to the stirring pipes 82. During the implementation process, the stirring pipes 82 move on the bidirectional lead screw 61 through the moving box 81. The multiple stirring pipes 82 perform rotational and linear reciprocating motions inside the inner housing 4. At the same time, the perforations 821 on the stirring pipes 82 eject fluid. On the one hand, the mechanical motion of the stirring pipes 82 plays a role in stirring the fermentation materials, making the materials more evenly mixed. At the same time, the heating plate 9 heats the materials at multiple positions inside the inner housing 4. On the other hand, the fluid ejected from the perforations 821 can perform targeted treatment on the materials, such as adjusting the temperature, cleaning, etc.

[0038] Among them, the multiple stirring pipes 82 form a spiral structure. During the implementation process, the spiral structure enables the stirring pipes 82 to generate a combined flow in the axial and radial directions when rotating. The materials inside the inner housing 4 will not only be pushed by the stirring pipes 82 to perform circular motions, but also generate axial flows along the direction of the spiral line, forming a complex three-dimensional flow pattern. This combined flow can more effectively break the stationary regions in the materials, thereby generating more turbulence and shear forces, further enhancing the stirring and mixing effects on the materials, and being beneficial to the uniform distribution of nutrients and the full contact of microorganisms during the fermentation process.

[0039] In addition, from the perspective of cleaning, for this reason, refer to the attached Figure 8As shown, the stirring assembly 8 further includes a fixing base 83 which is arranged inside the stirring tube 82. A push rod 84 is slidably arranged on the fixing base 83. The inner end of the push rod 84 is connected with a piston 85, and the outer end of the push rod 84 is connected with the heating plate 9. A spring 86 is sleeved outside the push rod 84 and is located between the fixing base 83 and the piston 85. When the piston 85 is impacted by the fluid, the push rod 84 extends outwards to drive the heating plate 9 close to the inner wall of the inner housing 4. A scraper 91 which contacts with the inner wall of the outer housing 2 is arranged on the outside of the heating plate 9. During the implementation process, when there is fluid flowing in the stirring tube 82, the pressure of the fluid will impact on the piston 85. Since the piston 85 is connected with the push rod 84 and the push rod 84 can slide on the fixing base 83, when the piston 85 is impacted by the fluid, a displacement along the direction of the push rod 84 will be generated to push the push rod 84 to extend outwards. At this time, the spring 86 is compressed to absorb part of the impact force and prevent the piston 85 and the push rod 84 from being damaged by excessive instantaneous force. When the fluid impact stops or weakens, the spring 86 will push the piston 85 and the push rod 84 to return to the initial position by virtue of its own elastic force. When the push rod 84 extends outwards under the action of external force, it will drive the heating plate 9 to move together. The heating plate 9 approaches the inner wall of the inner housing 4, so that the scraper 91 can scrape the inner wall of the inner housing 4 to prevent the material from accumulating on the wall surface, which affects the fermentation effect and the sanitary condition.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A food microbial fermentation device, comprising a mounting frame (1), an outer housing (2) is provided on the mounting frame (1), a feed pipe (21) and a discharge pipe (22) are provided on the outer housing (2), a feed valve (23) and a discharge valve (24) are respectively installed on the feed pipe (21) and the discharge pipe (22), and a heater (3) is installed inside the outer housing (2); characterized in that: An inner housing (4) is further installed inside the outer housing (2), the top and bottom of the inner housing (4) are respectively communicated with the feed pipe (21) and the discharge pipe (22), an opening (41) is provided on the side of the inner housing (4), and a rotating assembly (5) is provided at the position of the opening (41); A driving assembly (6) is provided on the rotating assembly (5) so that the driving assembly (6) can perform a horizontal rotation action; A diversion assembly (7) is provided on the driving assembly (6), the diversion assembly (7) is communicated with two groups of stirring assemblies (8) so that the two groups of stirring assemblies (8) can spray fluids simultaneously; The two groups of stirring assemblies (8) are inside the inner housing (4) and are connected to the driving assembly (6) so that the two groups of stirring assemblies (8) can perform reciprocating actions of approaching or moving away from each other, and heating plates (9) are provided on both groups of stirring assemblies (8).

2. The food microbial fermentation device according to claim 1, characterized in that: The diversion assembly (7) is connected to an external cold source so that the cold source cooperates with the heater (3) and the heating plate (9) to be able to finely adjust the temperature inside the inner housing (4) when cooling down.

3. The food microbial fermentation device according to claim 1, characterized in that: The diversion assembly (7) is connected to an external liquid source so that the liquid source cooperates with the stirring assembly (8) to be able to fully flush and spray the inside of the inner housing (4) during cleaning.

4. The food microbial fermentation device according to claim 2 or 3, characterized in that: The rotating assembly (5) includes a rotating plate (51), there are two rotating plates (51) which are respectively rotatably arranged at the positions of the two openings (41), and one of the rotating plates (51) is connected to a rotating motor (52) arranged inside the outer housing (2), and the driving assembly (6) is arranged on the rotating plate (51).

5. The food microbial fermentation device according to claim 4, characterized in that: The driving assembly (6) includes a bidirectional lead screw (61), the bidirectional lead screw (61) is rotatably arranged inside the inner housing (4) and one end extends to the outside of the inner housing (4) and is connected to a driving motor (62), the driving motor (62) performs a reciprocating alternating rotation action of forward rotation and reverse rotation, a guide pipe (63) is provided on one side of the bidirectional lead screw (61), one end of the guide pipe (63) extends to the outside of the inner housing (4), the diversion assembly (7) is communicated with the guide pipe (63), and the two groups of stirring assemblies (8) cooperate with the guide pipe (63) and the bidirectional lead screw (61).

6. The food microbial fermentation device according to claim 5, characterized in that: The diversion assembly (7) includes a connection box (71). One side of the connection box (71) is connected to the guide pipe (63), and the other side is communicated with a rotating pipe (72). The rotating pipe (72) is rotatably arranged on the outer shell (2) and is provided with a diversion valve (73) thereon. The end of the rotating pipe (72) extends to the outside of the outer shell (2) and is connected with a rotating joint (74). A cold source and / or a liquid source are connected to the rotating joint (74). The guide pipe (63) is communicated with the stirring assembly (8) through a hose (75).

7. The food microorganism fermentation equipment according to claim 6, characterized in that: The stirring assembly (8) includes a moving box (81). The moving box (81) is fitted to the bidirectional lead screw (61) and the guide pipe (63) and is communicated with the hose (75). A plurality of stirring pipes (82) are communicated on the moving box (81). A plurality of perforations (821) are provided on the plurality of stirring pipes (82). The heating plate (9) is connected to the stirring pipe (82).

8. The food microorganism fermentation equipment according to claim 7, characterized in that: The plurality of stirring pipes (82) form a spiral structure.

9. The food microorganism fermentation equipment according to claim 8, characterized in that: The stirring assembly (8) further includes a fixed seat (83). The fixed seat (83) is arranged in the stirring pipe (82). A push rod (84) is slidably arranged on the fixed seat (83). The inner end of the push rod (84) is connected with a piston (85). The outer end of the push rod (84) is connected with the heating plate (9). A spring (86) is sleeved outside the push rod (84). The spring (86) is located between the fixed seat (83) and the piston (85). When the piston (85) is impacted by fluid, the push rod (84) extends outwards to drive the heating plate (9) to approach the inner wall of the inner shell (4).

10. The food microorganism fermentation equipment according to claim 9, characterized in that: A scraping plate (91) in contact with the inner wall of the outer shell (2) is arranged on the outer side of the heating plate (9).

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