Probiotic fermentation device

Abstract

The utility model relates to a probiotic fermentation device which comprises a fermentation tank, a feed port and an exhaust port are formed in the top of the fermentation tank, and a discharge port is formed in the bottom of the fermentation tank; the stirring device comprises a motor fixed at the top of the fermentation tank, a stirring shaft connected with an output shaft of the motor, and a stirring paddle on the stirring shaft; the foam eliminating mechanism comprises a foam detection sensor and a foam collecting tank which are mounted at the upper part in the fermentation tank, the bottom of the foam collecting tank is connected with a defoaming pump outside the fermentation tank through a pipeline, and an outlet of the defoaming pump is connected with the lower part of fermentation liquor in the fermentation tank through a pipeline; the temperature control system comprises a temperature sensor mounted in the fermentation tank, a heating wire wound in a heat preservation layer of the fermentation tank, a cooling pipe disc wound on the outer wall of the fermentation tank, and a heat preservation layer wrapping the outer side of a cooling pipe; and the filtering device is positioned at the discharge hole of the fermentation tank. The device effectively solves the problems of foam and temperature control in probiotic fermentation, and improves the fermentation efficiency and the product quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to a probiotic processing equipment technical field, concretely relates to a probiotic fermentation device. BACKGROUND

[0002] In today's industrial production and scientific research field, the importance of probiotic fermentation technology is increasingly prominent, and it is widely used in food, medicine, agriculture and other key industries, however, its development process is faced with many problems to be solved.

[0003] In the process of probiotic fermentation, one of the prominent problems is the generation of foam. With the continuous fermentation, the metabolic activity of microorganisms gradually thrives, which often causes a large amount of foam to appear. These foams not only occupy a considerable space in the fermentation container, greatly reducing the effective volume available for probiotic growth and fermentation, but also easily cause the fermentation liquid to overflow the container, resulting in serious waste of raw materials and pollution to the surrounding production environment. More importantly, excessive foam can significantly increase the contact area between the fermentation system and the air, which undoubtedly causes a large amount of oxygen to mix into the fermentation environment for many anaerobic probiotics, greatly destroying the anaerobic conditions for their survival and efficient metabolism, and thus having a serious negative impact on the yield and quality of fermentation products, such as causing a sharp decrease in the number of viable probiotics, a decrease in the content of active ingredients in fermentation products, and an undesirable change in flavor, etc.

[0004] In the face of this thorny problem of foam, researchers have also tried various solutions. Among them, the mechanical defoaming method is more common, that is, a stirring paddle is installed inside the fermentation tank, hoping to break up the foam by rotating the paddle at high speed. However, this method has unsatisfactory results in actual application, and its elimination capacity is very limited for a large amount of foam generated by large-scale fermentation. Moreover, excessive stirring can irreversibly damage the growth environment of probiotics, change the shear force of the fermentation liquid, and thus affect the integrity of the probiotic cell membrane and normal metabolic function, while also consuming a large amount of energy resources, significantly increasing production costs. Chemical defoaming is also a means adopted, which reduces the surface tension of the foam by adding a chemical defoaming agent to the fermentation system to cause the foam to break. However, this method has many insurmountable drawbacks. First of all, there is a problem of residual defoaming agent. In fields such as food and medicine, where product quality and safety are extremely high, the residual defoaming agent mixed into the fermentation product can pose a potential threat to the health of consumers. Secondly, it is difficult to accurately control the amount of defoaming agent added. Adding too much will have a significant inhibitory effect on the growth of probiotics, while adding too little will not effectively eliminate the foam, which makes the stability and repeatability of the fermentation process extremely poor. SUMMARY

[0005] In order to solve the problems presented in the background art, the utility model provides a kind of probiotic fermentation device, the generation situation of foam is perceived in real time, accurately by foam detection sensor, once foam reaches predetermined degree, defoaming pump is automatically started, and the foam collected by foam collection tank is sucked to fermentation liquor lower part by pipeline, and foam is broken and dispersed efficiently by stirring device, and re-melt into fermentation liquor.

[0006] In order to solve the above technical problems, the technical scheme provided by the utility model is:

[0007] A kind of probiotic fermentation device, comprising: fermentation tank, stirring device, foam elimination mechanism, temperature control system, filtering device;

[0008] The fermentation tank is a sealed tank body, is equipped with feed inlet and exhaust port at top, is equipped with discharge port at bottom, feed inlet is equipped with sealing cover, is connected with feed inlet by screw thread, prevents the air, dust and miscellaneous bacteria etc. of outside from entering tank, ensures the purity of fermentation process, simultaneously makes the gas generated in fermentation process smoothly discharge, avoids that tank pressure is too high, simultaneously can prevent outside air from flowing back into tank again;

[0009] The stirring device includes motor, stirring shaft and stirring paddle, motor is fixed at the top of fermentation tank, the stirring shaft is installed at the center position of the top of fermentation tank by sealing bearing, is connected with motor output shaft and extends to the inside of fermentation tank, stirring paddle is installed on stirring shaft, is rotated by motor to drive stirring shaft and stirring paddle, so that probiotic in fermentation liquor and substrate are fully mixed and contacted, promote fermentation reaction to be carried out uniformly and efficiently, avoid material deposition and local uneven nutrition, thereby improve fermentation efficiency and the consistency of product quality;

[0010] The foam elimination mechanism includes foam collection tank, pipeline, defoaming pump and foam detection sensor, foam detection sensor is installed at the tank top position inside fermentation tank, foam collection tank is arranged at the top inside fermentation tank, and its bottom is connected with defoaming pump located outside fermentation tank by pipeline, the outlet of defoaming pump is connected to the lower part of fermentation liquor in fermentation tank, when the foam in the inside of device reaches certain degree, foam collection tank collects rising foam, and defoaming pump sucks foam and sends back to the lower part of fermentation liquor by pipeline, so that foam is mixed into fermentation liquor again, and is broken and dispersed under the synergistic effect of stirring device, effectively eliminates foam, prevents that foam is too much and has negative influence on fermentation process;

[0011] The temperature control system comprises a temperature sensor, a heating wire and a cooling pipe, the temperature sensor is installed inside the fermentation tank, the heating wire is wound in the heat preservation layer of the fermentation tank, the cooling pipe is coiled on the outer wall of the fermentation tank, and the outer side of the cooling pipe is wrapped with a heat preservation layer to reduce heat loss; the device monitors the temperature of the fermentation broth in real time through the temperature sensor, when the temperature is lower than the suitable fermentation temperature, the heating wire is powered to generate heat, the fermentation tank is heated, and the temperature is increased; when the temperature is higher than the suitable range, the cooling pipe is connected with cooling liquid to take away heat and reduce the temperature of the fermentation broth, so that the fermentation of probiotics is always carried out under the best temperature condition, which is beneficial to the growth and metabolism of probiotics and ensures the stability of fermentation and the product quality.

[0012] The filtering device is located at the discharge port of the fermentation tank and adopts a multi-layer filter screen structure to filter the discharged fermentation broth after fermentation, effectively intercept and remove the probiotic bacteria, and the solid impurities which are not completely reacted, and obtain pure fermentation broth products.

[0013] Preferably, the stirring paddle adopts a propeller blade structure, which can generate a more complex flow field during stirring, enhance the shear force on the fermentation broth, and make the material mixing more uniform and efficient, the surface of the paddle is subjected to sanding treatment to enhance the foam breaking capacity, and is connected with an automatic control system, the automatic control system automatically adjusts the stirring speed according to the data feedback by the viscosity sensor and the foam detection sensor installed in the fermentation tank, in the early stage of fermentation, when the viscosity is low and the amount of foam is small, a lower stirring speed is adopted to save energy and avoid damage to probiotics caused by excessive stirring, when the viscosity increases or the foam increases during fermentation, the stirring speed is automatically increased to ensure the mixing and defoaming effect, thereby further optimizing the fermentation process and improving the fermentation quality and efficiency.

[0014] Preferably, the automatic control system comprises a controller, a signal acquisition module and an execution module, the signal acquisition module is connected with the viscosity sensor and the foam detection sensor, the controller receives the signal of the signal acquisition module and generates a control instruction according to a preset algorithm, and the execution module adjusts the motor speed according to the control instruction to realize the adjustment of the stirring paddle speed, the connection mode between the automatic control system and the motor, the viscosity sensor and the foam detection sensor adopts circuit connection to ensure the stability and timeliness of signal transmission, thereby realizing the efficient stirring of the stirring device on the fermentation broth and the effective breaking and mixing of the foam, and improving the fermentation efficiency and quality.

[0015] Preferably, the foam detection sensor is a capacitive sensor, based on the difference in dielectric constant between the foam, air and fermentation broth, when the foam contacts the sensor and causes the capacitance value to change to reach a preset threshold, the defoaming pump is triggered to start.

[0016] Preferably, the defoaming pump is a peristaltic pump, which can stably suck and transport the foam in the foam collecting tank to the lower part of the fermentation liquid by extruding the elastic hose through a roller, and has good sealing performance, thereby preventing gas leakage and liquid backflow and ensuring efficient and stable defoaming process.

[0017] Preferably, the inner wall of the foam collecting tank is provided with an anti-sticking coating, so that the foam can be prevented from adhering and accumulating in the collecting tank, and the foam can smoothly enter the pipeline, thereby avoiding pipeline blockage or defoaming efficiency reduction caused by foam adhesion.

[0018] Preferably, the pipeline is provided with a one-way valve, so that the fermentation liquid can be prevented from flowing back to the foam collecting tank, thereby avoiding problems such as defoaming pump failure and foam collecting tank overflow caused by fermentation liquid backflow.

[0019] Preferably, the heating wire is uniformly wound in the heat preservation layer of the fermentation tank, so that the fermentation tank is uniformly heated, and local overheating or overcooling is avoided, thereby ensuring the uniformity of the fermentation liquid temperature; and the cooling pipe is spirally arranged on the outer wall of the fermentation tank, so that the contact area with the fermentation tank is increased, and the cooling efficiency is improved.

[0020] Preferably, the filtering device with the multi-layer screen structure comprises a coarse screen and a fine screen, the coarse screen first intercepts larger impurities such as incompletely dissolved solid raw material particles and larger bacterial aggregate, and the fine screen further filters smaller impurities and part of the bacteria, and the two cooperate to efficiently filter the probiotic bacteria or other solid impurities after fermentation, thereby ensuring that the fermentation liquid flowing out of the discharge port has high purity.

[0021] Compared with the prior art, the utility model has the advantages that:

[0022] 1. The foam eliminating mechanism is composed of the foam collecting tank, the pipeline, the defoaming pump and the foam detection sensor, the foam detection sensor can monitor the generation of the foam on the surface of the fermentation liquid in real time and accurately, once the amount of the foam reaches the preset threshold value, the defoaming pump will respond quickly and start in time to suck the foam accumulated in the foam collecting tank and send it back to the lower part of the fermentation liquid through the pipeline, and the foam is broken by the stirring device, so that the foam mixed into the fermentation liquid again can be dispersed and digested quickly. The foam eliminating mechanism can effectively avoid the problem that the fermentation liquid overflows due to excessive foam, and significantly reduces the fermentation space occupied by the foam, and at the same time, the foam is accurately controlled, and a large amount of oxygen mixed into the fermentation system due to the existence of the foam is successfully prevented, and the ideal growth conditions of the anaerobic probiotic bacteria are ensured.

[0023] 2.The utility model discloses a temperature sensor is monitored the temperature change of fermentation liquor, once the temperature deviates from the best fermentation temperature range of prearranging, and temperature control system will accurately control the working condition of heating wire and cooling pipe, whether it is in the temperature change of the temperature rise stage of fermentation initial stage or the fermentation process because of the heat of microbial metabolism or the temperature change of the change of external environment, can respond quickly, accurately adjust the heating or cooling power, ensure that the fermentation liquor temperature always stably maintain in the optimum interval of the growth of probiotic bacteria. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic diagram of the utility model.

[0025] 1, fermentation tank;2, stirring device;3, foam elimination mechanism;4, temperature control system;5, filter device;6, automation control system;11, feed inlet;12, exhaust port;13, discharge port;14, heat preservation layer;21, motor;22, stirring shaft;23, stirring paddle;31, foam collection tank;32, pipeline;33, defoaming pump;34, foam detection sensor;41, temperature sensor;42, heating wire;43, cooling pipe;61, controller;62, signal acquisition module;63, execution module. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0027] As Figure 1 Indicated, a kind of probiotic fermentation device, including: fermentation tank 1, stirring device 2, foam elimination mechanism 3, temperature control system 4, filter device 5.

[0028] Specifically, fermentation tank 1 top is equipped with feed inlet 11, feed inlet 11 is equipped with sealing cover, is connected with feed inlet 11 by screw thread, prevents the air, dust and miscellaneous bacteria etc. unfavorable factor of outside from entering tank, ensure the purity of fermentation process, simultaneously, top is equipped with exhaust port 12, exhaust port 12 connects one-way exhaust valve, so that the gas generated in fermentation process is smoothly discharged, avoid tank internal pressure too high, simultaneously can prevent outside air backflow into tank.

[0029] Specifically, the outer wall of the fermentation tank 1 spirally distributes a cooling pipe 43, the cooling pipe 43 adopts copper pipe material with excellent heat conduction performance, such material can efficiently transfer heat, ensuring the timeliness and accuracy of temperature regulation; the inlet and outlet of the cooling pipe 43 are connected with the external cooling liquid circulation system, forming a complete heat dissipation loop; on the outside of the cooling pipe 43, a thick heat preservation layer 14 is wrapped, the heat preservation layer 14 is made of polyurethane foam material, which can reduce heat loss and further enhance the effect of temperature control, avoiding the influence of the fluctuation of the external environment temperature on the temperature in the fermentation tank 1, ensuring that the fermentation process can continue under relatively stable temperature conditions.

[0030] Specifically, the fermentation tank 1 is internally provided with a stirring device 2, which is composed of a motor 21, a stirring shaft 22 and a stirring paddle 23, the motor 21 is fixedly installed at the center of the top of the fermentation tank 1, the output shaft of the motor 21 is connected with the stirring shaft 22 through a shaft coupling, the stirring shaft 22 extends vertically downward along the central axis of the fermentation tank 1, and its two ends are respectively installed at the top and the bottom of the fermentation tank 1 through sealing bearings, so as to ensure the stability of the stirring shaft 22 during high-speed rotation.

[0031] Specifically, the stirring paddle 23 adopts a propeller blade structure, which can generate a complex and efficient flow field during rotation, so as to promote the probiotics and the substrate in the fermentation broth to be fully mixed, greatly improving the uniformity and efficiency of the fermentation reaction; the surface of the paddle is subjected to sanding treatment, so as to enhance the breaking capacity of the paddle to foam; the stirring paddle 23 is connected with the stirring shaft 22 through welding.

[0032] Specifically, the stirring device 2 is also provided with an automatic control system 6, which is composed of a controller 61, a signal acquisition module 62 and an execution module 63, the signal acquisition module 62 is closely connected with a viscosity sensor and a foam detection sensor 34 installed in the fermentation tank 1.

[0033] Specifically, the viscosity sensor can monitor the viscosity change of the fermentation broth in real time, and the foam detection sensor 34 adopts a capacitive sensor and is installed at the position of the top of the fermentation tank 1, which can sensitively perceive the generation and accumulation degree of the foam, when the data collected by these sensors changes, the signals will be quickly transmitted to the controller 61, the controller 61 analyzes and processes these signals according to the preset algorithm, generates accurate control instructions, and sends the instructions to the execution module 63, the execution module 63 accurately adjusts the rotating speed of the motor 21 according to the control instructions, so as to realize the automatic adjustment of the rotating speed of the stirring paddle 23.

[0034] Specifically, the automatic control system 6 is connected with the motor 21, the viscosity sensor and the foam detection sensor 34 through a circuit.

[0035] Specifically, inside the fermentation tank 1, a foam elimination mechanism 3 is further arranged on the upper side, which is composed of a foam collecting groove 31, a pipeline 32, a defoaming pump 33 and a foam detection sensor 34.

[0036] Specifically, the foam collecting groove 31 is semicircular and opens upward, and the inner wall of the foam collecting groove 31 is coated with an anti-sticking coating. The anti-sticking coating is made of polytetrafluoroethylene material and has an extremely low surface friction coefficient, which can effectively prevent the foam from adhering and accumulating on the groove wall and ensure that the foam can smoothly slide into the pipeline 32; the foam collecting groove 31 is fixed on the inner wall of the fermentation tank 1 by welding.

[0037] Specifically, the pipeline 32 is made of a rubber hose, one end of which is tightly connected to the lowest part of the bottom of the foam collecting groove 31 to ensure that all the sliding foam can be collected, and the other end penetrates through the wall of the fermentation tank 1 and is connected to the defoaming pump 33 located outside the fermentation tank 1.

[0038] Specifically, the connection between the pipeline 32 and the bottom of the foam collecting groove 31 adopts a sealed and detachable connection mode, which facilitates regular cleaning and maintenance of the pipeline 32 and prevents impurities from accumulating to affect the defoaming effect.

[0039] Specifically, a one-way valve is further installed on the pipeline 32, which is a ball one-way valve, ensuring that the foam can only flow from the foam collecting groove 31 to the defoaming pump 33 when the defoaming pump 33 is working, and effectively preventing the fermentation liquid from flowing back to the foam collecting groove 31.

[0040] Specifically, the defoaming pump 33 is a peristaltic pump, which is fixed on the base outside the fermentation tank 1 by a bracket, and its inlet and outlet are tightly connected with the pipeline 32 and the reflux pipe at the bottom of the fermentation tank 1 respectively, and the outlet of the reflux pipe is located below the stirring paddle 23, which helps the sucked foam to be quickly broken and dispersed under the strong action of the stirring paddle 23 and then evenly mixed into the fermentation liquid.

[0041] Specifically, a temperature sensor 41 of a temperature control system 4 is installed at the center position inside the fermentation tank 1, which is a thermistor temperature sensor and can monitor the temperature change of the fermentation liquid in real time and accurately, and quickly and accurately convert the temperature signal into an electrical signal to transmit to the external temperature controller 61.

[0042] Specific, temperature control system 4 heating wire 42 winding in the fermentation tank 1 heat preservation layer 14, evenly distributed around the tank wall, heating wire 42 with nickel-chromium alloy, can be powered quickly generate heat, high efficiency heating of the fermentation tank 1;Heating wire 42 and the external power supply and temperature controller 61 connection, when the temperature sensor 41 detects the fermentation broth temperature is lower than the preset fermentation temperature, temperature controller 61 will automatically control the heating wire 42 power, so that the temperature in the fermentation tank 1 rises, until the set appropriate temperature range.

[0043] Specific, the device is provided with a filter device 5 located at the discharge port 13 of the fermentation tank 1, filter device 5 adopts multilayer filter screen structure, including coarse filter screen and fine filter screen, coarse filter screen is located near the discharge port 13 of the fermentation tank 1 side, its aperture is 100 mesh, can preliminary intercept larger particles of impurities;Fine filter screen is located downstream of the coarse filter screen, aperture is 300 mesh, can further filter out smaller impurities and part of the bacteria body;Filter device 5 is connected with the discharge port 13 of the fermentation tank 1 through flange connection and is closely connected.

[0044] The working principle of the probiotic fermentation device is as follows:

[0045] In the initial stage of probiotic fermentation, first, the pretreated fermentation substrate and probiotic bacteria are accurately added into the fermentation tank 1 through the feed inlet 11, then the feed inlet 11 is closed, and the stirring device 2 and the temperature control system 4 are started. The motor 21 of the stirring device 2 starts to operate, driving the stirring shaft 22 and the stirring paddle 23 to rotate at high speed, and the stirring paddle 23 makes the probiotics and the substrate in the fermentation broth mix rapidly and fully, providing good conditions for the start of the fermentation reaction. At the same time, the temperature sensor 41 of the temperature control system 4 monitors the temperature of the fermentation broth in real time, and when the detected temperature is lower than the preset fermentation temperature, the heating wire 42 is powered to generate heat, and the heat is transferred to the fermentation broth through the tank wall, so that the temperature gradually rises. When the temperature is higher than the preset value, the cooling liquid in the cooling pipe 43 circulates to take away the heat, so that the temperature of the fermentation broth is maintained within the appropriate range, ensuring that the probiotics are always in the best growth temperature environment.

[0046] With the continuous fermentation process, the metabolic activity of microorganisms gradually enhanced, will produce a certain amount of foam. When the foam rises to the foam collection tank 31, the foam detection sensor 34 acutely aware of the presence of foam and the degree of accumulation, once the preset trigger condition is reached, immediately send a signal to the automation control system 6. After receiving the signal, the automation control system 6, quickly start the defoaming pump 33, defoaming pump 33 through the pipeline 32 will be foam collection tank 31 within the foam suction to the fermentation broth lower, at this time, the high-speed rotation of the stirring paddle 23 and frosted surface on the foam for further crushing and dispersion, so that the foam re-mix into the fermentation broth, thereby effectively eliminating the foam, avoid the adverse effects of foam on the fermentation process, maintain the stability of the fermentation environment and normal fermentation process.

[0047] Through the above detailed description of the specific embodiments of the "probiotic fermentation device" of the utility model, the overall structure of the device, the function of each component, the interaction and working principle are comprehensively and deeply described. The sequence from outside to inside and from top to bottom is gradually unfolded, so that the reader can understand the overall design concept and technical advantages of the device in sequence. The utility model fully demonstrates the innovation and practicality of the utility model in the field of probiotic fermentation, and is expected to provide strong technical support and promoting effect for the development of related industries.

[0048] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model 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 utility model. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A probiotic fermentation apparatus comprising: The fermentation tank (1), stirring device (2), foam elimination mechanism (3), temperature control system (4), filter device (5); The fermentation tank (1) is a sealed tank body, provided with a feeding port (11) and an exhaust port (12) at the top, the feeding port (11) being provided with a sealing cover, and a discharging port (13) at the bottom; The stirring device (2) comprises a motor (21), a stirring shaft (22) and a stirring paddle (23), the motor (21) being fixed at the top of the fermentation tank (1), the stirring shaft (22) being installed at the center of the top of the fermentation tank (1) through a sealing bearing, connected with the output shaft of the motor (21) and extending into the fermentation tank (1), and the stirring paddle (23) being installed on the stirring shaft (22); The foam elimination mechanism (3) comprises a foam collecting groove (31), a pipeline (32), a defoaming pump (33) and a foam detection sensor (34), the foam detection sensor (34) being installed at the top of the fermentation tank (1), the foam collecting groove (31) being arranged at the top of the fermentation tank (1), and the bottom of the foam collecting groove (31) being connected with the defoaming pump (33) outside the fermentation tank (1) through the pipeline (32), and the outlet of the defoaming pump (33) being connected with the lower part of the fermentation liquid in the fermentation tank (1); The temperature control system (4) comprises a temperature sensor (41), a heating wire (42) and a cooling pipe (43), the temperature sensor (41) being installed in the fermentation tank (1), the heating wire (42) being wound in the heat preservation layer (14) of the fermentation tank (1), and the cooling pipe (43) being coiled on the outer wall of the fermentation tank (1), and the cooling pipe (43) being wrapped with the heat preservation layer (14) outside. The filter device (5) is arranged at the discharging port (13) of the fermentation tank (1) and adopts a multi-layer filter screen structure.

2. The probiotic fermentation apparatus of claim 1, wherein, The stirring paddle (23) adopts a propeller blade structure, the surface of the paddle blade is subjected to sanding treatment, and is connected with an automatic control system (6), the automatic control system (6) automatically adjusts the stirring speed according to the data fed back by the viscosity sensor and the foam detection sensor (34) installed in the fermentation tank (1).

3. The probiotic fermentation apparatus of claim 2, wherein, The automatic control system (6) comprises a controller (61), a signal acquisition module (62) and an execution module (63), the signal acquisition module (62) is connected with the viscosity sensor and the foam detection sensor (34), the controller (61) receives the signals of the signal acquisition module (62) and generates control instructions according to a preset algorithm, and the execution module (63) adjusts the rotating speed of the motor (21) according to the control instructions, so as to realize the adjustment of the rotating speed of the stirring paddle (23), and the connection mode between the automatic control system (6) and the motor (21), the viscosity sensor and the foam detection sensor (34) adopts circuit connection.

4. The probiotic fermentation apparatus of claim 1, wherein, The foam detection sensor (34) is a capacitive sensor.

5. The probiotic fermentation apparatus of claim 1, wherein, The defoaming pump (33) is a peristaltic pump.

6. The probiotic fermentation apparatus of claim 1, wherein, The inner wall of the foam collecting groove (31) is provided with an anti-sticking coating.

7. The probiotic fermentation apparatus of claim 1, wherein, A one-way valve is arranged on the pipeline (32).

8. The probiotic fermentation apparatus of claim 1, wherein, The heating wire (42) is uniformly wound in the heat preservation layer (14) of the fermentation tank (1), and the cooling pipe (43) is coiled on the outer wall of the fermentation tank (1).

9. The probiotic fermentation apparatus of claim 1, wherein: The filtering device (5) of the multi-layer screen structure comprises a coarse screen and a fine screen.

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