Intelligent constant-pressure and constant-temperature sterile air system for liquid fermentation of edible and medicinal fungus hyphae

Abstract

The invention relates to the field of devices for microbiology, in particular to an intelligent constant-pressure constant-temperature sterile air system for liquid fermentation of edible and medicinal fungus hyphae. A tail gas outlet is formed in the inner tank; an inlet and an outlet are formed in the outer tank; the tail gas outlet is communicated with a heat source inlet of a heat exchanger, a heated gas inlet of the heat exchanger is communicated with a compressed air pipeline used for conveying compressed air, and a heated gas outlet of the heat exchanger is communicated with an air inlet of a filtering assembly used for conducting sterile filtering on the compressed air. An air outlet of the filtering assembly is communicated with an air inlet of the inner tank, and the air inlet is formed in the bottom of the inner tank. The problem that an existing edible and medicinal fungus hypha liquid fermentation system is unstable in hypha culture effect is solved, and the intelligent constant-pressure and constant-temperature sterile air system for edible and medicinal fungus hypha liquid fermentation can enable the hypha culture effect to be stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of devices for microbiology, in particular to an intelligent constant-pressure constant-temperature sterile air system for mycelial liquid fermentation of edible and medicinal fungi. BACKGROUND

[0002] Edible and medicinal fungi are large fleshy or gelatinous fruiting bodies of higher fungi with high nutritional and medicinal value. Wild collection cannot meet the demand for edible and medicinal fungi, so people began to cultivate edible and medicinal fungi artificially, and then cultivated edible and medicinal fungi through fermentation culture.

[0003] Fermentation culture mainly includes solid fermentation, liquid fermentation and mixed liquid fermentation, among which liquid fermentation is the most commonly used method. Liquid fermentation refers to using mycelium or fermentation broth for mass production of edible and medicinal fungi, and the process flow is test tube slant strain, shake flask strain, primary strain, secondary strain, tertiary strain and fermentation tank. The fermentation tank usually includes a tank body, and the tank body is provided with a sterile air inlet and a culture liquid filling port.

[0004] The sterile air inlet is provided on the tank body because edible and medicinal fungi are mostly aerobic fungi, such as ganoderma lucidum, grifola frondosa, hericium erinaceus, armillaria mellea and cordyceps fungi. A large amount of sterile air needs to be continuously introduced during cultivation to ensure normal growth of the strain, and the temperature of the introduced sterile air should not be lower than the fermentation culture temperature of the strain (24~32℃). Sometimes, in order to promote growth, the temperature needs to be 5℃~10℃ higher than the fermentation culture temperature of the strain. The sterile air used in the existing fermentation tank is provided by an air compressor system, most of which has no heating part or only one electric heater. The sterile air provided by the air compressor system without heating part is usually around 20℃, and in areas where the outdoor temperature can drop to below zero, the temperature can drop to below 20℃, which is lower than the fermentation culture temperature of the strain and is not conducive to the growth of the strain. The air compressor system with an electric heater consumes a lot of energy and lacks pressure control components, so the failure rate is high. In addition, if the mycelium is not intervened during growth, it will become a larger mycelium ball, and the core of the mycelium ball will lack nutrients and oxygen due to mass transfer resistance, becoming a "dead zone" and affecting the culture effect of edible and medicinal fungi.

[0005] Therefore, the existing mycelial liquid fermentation system of edible and medicinal fungi has the problem of unstable mycelial culture effect. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the shortcomings of the above-mentioned prior art, and to provide an intelligent constant-pressure constant-temperature sterile air system for mycelial liquid fermentation of edible and medicinal fungi, which can make the mycelial culture effect more stable.

[0007] In order to solve the above technical problems, the food and medicinal fungus mycelium liquid fermentation intelligent constant pressure and constant temperature sterile air system provided by the present application comprises a fermentation tank, the fermentation tank comprises an inner tank and a tank cover matched with the inner tank; an exhaust gas outlet is formed on the inner tank, and an inlet and an outlet are formed on the outer tank; the exhaust gas outlet is in communication with a heat source inlet of a heat exchanger, a heated gas inlet of the heat exchanger is in communication with a compressed air pipeline for conveying compressed air, a heated gas outlet of the heat exchanger is in communication with an air inlet of a filter assembly for sterile filtering of the compressed air, and the air outlet of the filter assembly is in communication with an air inlet of the inner tank, and the air inlet is located at the bottom of the inner tank.

[0008] As a further improvement of the present application, an air feeding assembly for feeding sterile air into the inner tank is fixedly installed on the inner bottom of the inner tank.

[0009] Preferably, the air feeding assembly comprises a fifth pipeline in communication with the air inlet and a ring-shaped tube in communication with the air outlet of the fifth pipeline.

[0010] As a further improvement of the present application, a plurality of aeration assemblies for increasing the gas-liquid contact area are installed on the air feeding assembly.

[0011] Preferably, the aeration assembly comprises a first horn tube in communication with the air outlet hole, the large end of the first horn tube is fixedly connected with the air feeding assembly, the small end of the first horn tube is fixedly connected with one end of a narrow tube, a waterproof and air-permeable membrane is arranged between the first horn tube and the narrow tube, the end of the narrow tube away from the first horn tube is fixedly connected with the small end of a second horn tube, and a plurality of suction holes are formed on the narrow tube.

[0012] Preferably, a conical filter screen for filtering large particles in the fermentation liquid is fixedly installed in each of the plurality of suction holes.

[0013] Preferably, a protective shell in communication with the first horn tube is installed on the first horn tube, an air flow baffle capable of rotating around a direction perpendicular to the central axis of the first horn tube is rotatably installed in the protective shell, and a flexible magnetic strip for magnetically connecting with the air flow baffle is fixedly installed on the inner wall of the first horn tube.

[0014] As a further improvement of the present application, the heat exchanger is a double-pipe heat exchanger or a plate heat exchanger.

[0015] As a further improvement of the present application, the filter assembly comprises a shell and two-stage filters arranged in the shell. The two-stage filters comprise a front filter layer for rough filtration and a rear filter layer for fine filtration arranged from top to bottom.

[0016] As a further improvement of the present application: the inner tank is provided with a stirring assembly, the stirring assembly comprises a rotating shaft capable of rotating in the inner tank around the central axis of the inner tank and a motor for driving the rotating shaft to rotate, a plurality of blades are installed on the rotating shaft.

[0017] The beneficial effects of the present application are as follows: the intelligent constant-pressure constant-temperature sterile air system for liquid fermentation of edible and medicinal mushroom mycelium can make the mycelium culture effect more stable and the quality better.

[0018] Firstly, a large amount of biological fermentation tail gas is generated during the liquid fermentation of mycelium, the biological fermentation tail gas refers to the waste gas containing gas generated during the biological fermentation process, since fermentation is an exothermic reaction, the biological fermentation tail gas as the system discharge usually carries heat; in addition, in actual production, there are many fermentation tanks on the production line, for example, 4 groups of fermentation tanks are actually arranged during production, each group has 7 fermentation tanks, so on a certain day, about 4 fermentation tanks on the production line are in culture and fermentation production at the same time, and other fermentation tanks may be sterilized or disinfected by passing in high-temperature steam, and then steam tail gas is generated, the biological fermentation tail gas and the steam tail gas are collectively referred to as tail gas. The system uses the tail gas to heat the sterile air to be introduced into the fermentation tank, and a temperature sensor is arranged on the pipeline for conveying the heated sterile air to monitor the temperature of the heated sterile air in real time, the amount of tail gas of the heat exchanger is intelligently adjusted according to the temperature of the heated sterile air, so as to realize constant temperature of the introduced sterile air, and the tail gas is fully utilized, which is more environmentally friendly; a self-operated pressure reducing valve is arranged on the pipeline for conveying the heated sterile air, the pressure of the heated sterile air is intelligently adjusted to keep the pressure of the heated sterile air entering the inner tank constant, constant pressure is realized, and the temperature sensor is used for real-time monitoring, so as to create a good environment for mycelium growth and improve the mycelium culture effect. Secondly, the system is provided with a gas feeding assembly and an aeration assembly in the inner tank of the fermentation tank, the structure of the first horn pipe, the narrow pipe and the second horn pipe is arranged based on the Venturi effect, so that a negative pressure area is formed in the narrow pipe to suck the surrounding fermentation liquid into the narrow pipe, the sterile air is dispersed and fully contacts the sterile air, and small bubbles are formed to flow upward, so that the mycelium can fully contact the sterile air and the mycelium culture effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a top view of the present application; Figure 3 It is a schematic diagram of the overall structure of the fermentation tank and the support in the present application; Figure 4 It is a partial sectional view of the fermentation tank in the present application; Figure 5It is a local section view schematic diagram of the filter assembly in the application; Figure 6 It is a position relation schematic diagram of the air feeding assembly and the aeration assembly in the application; Figure 7 It is a whole structure schematic diagram of the aeration assembly in the application; Figure 8 It is a local section view schematic diagram of the aeration assembly in the application; The names of the components corresponding to the marks in the above-mentioned drawings are as follows: 1, fermentation tank; 101, inner tank; 1012, tail gas outlet; 102, tank cover; 103, outer tank; 1031, outlet; 1032, inlet; 104, interlayer cavity; 2, heat exchanger; 201, heat source inlet; 202, heat source outlet; 203, heated gas inlet; 204, heated gas outlet; 301, first pipeline; 3011, first air pump; 302, second pipeline; 303, compressed air pipeline; 304, third pipeline; 3041, self-operated pressure reducing valve; 3042, temperature sensor; 305, fourth pipeline; 4, liquid storage tank; 5, filter assembly; 501, shell; 502, pre-filter layer; 503, post-filter layer; 6, air feeding assembly; 601, fifth pipeline; 602, annular pipe; 7, aeration assembly; 701, first horn pipe; 702, narrow pipe; 7021, suction hole; 703, second horn pipe; 704, waterproof air permeable membrane; 705, protective shell; 706, air flow baffle; 707, magnetic stripe; 708, conical filter screen; 8, stirring assembly; 801, rotating shaft; 802, motor; 803, blade. DETAILED DESCRIPTION

[0020] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings.

[0021] The orientation words such as "up", "down", "left", "right", "front", "back", "top" and "bottom" in the application are all based on the direction defined by the cross-shaped orientation mark. The orientation words in the application are all described based on the definition, and do not change the represented orientation with the change of the angle of the drawing. Figure 2 As

[0022] , Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the edible and medicinal mushroom mycelium liquid fermentation intelligent constant pressure and constant temperature sterile air system provided by the present application comprises a fermentation tank 1, the fermentation tank 1 comprises an inner tank 101 and a tank cover 102 matched with the inner tank 101, an outer tank 103 is fixedly sleeved outside the inner tank 101, and a sandwich cavity 104 is formed between the outer tank 103 and the inner tank 101; a tail gas outlet 1012 is formed on the inner tank 101, an inlet 1031 and an outlet 1032 are formed on the outer tank 103, the inlet 1031 is located at the lower part of the outer tank 103, and the outlet 1032 is located at the upper part of the outer tank 103; the tail gas outlet 1012 and the outlet 1032 are both connected with the heat source inlet 201 of the heat exchanger 2 through the first pipeline 301, and the heat exchanger 2 is a jacketed heat exchanger or a plate heat exchanger. A first gas pump 3011 and an electric regulating valve are arranged on the first pipeline 301, the electric regulating valve is connected with the PID controller in control, the heat source outlet 202 of the heat exchanger 2 is connected with the gas inlet of the liquid storage tank 4 for storing concentrated liquid through the second pipeline 302, the liquid storage tank 4 is a double-layer tank, a sandwich space is formed between the inner tank body and the outer tank body, the gas inlet and the gas outlet are arranged on the outer tank body, and the liquid inlet and the liquid outlet are arranged on the inner tank body; the heat source outlet 202 of the heat exchanger 2 is also connected with the inlet 1031 of the outer tank 103; the heated gas inlet 203 of the heat exchanger 2 is connected with the compressed air pipeline 303 for conveying compressed air, one end of the compressed air pipeline 303 away from the heat exchanger 2 is connected with the gas outlet of the air compressor system, the heated gas outlet 204 of the heat exchanger 2 is connected with the gas inlet of the filter assembly 5 for sterile filtering of compressed air through the third pipeline 304, a self-operated pressure reducing valve 3041 for adjusting the medium flow in the third pipeline 304 and a temperature sensor 3042 for monitoring the temperature of the medium in the third pipeline 304 are arranged on the third pipeline 304, the temperature sensor 3042 is electrically connected with the PID controller, the gas outlet of the filter assembly 5 is connected with the air inlet of the inner tank 101 through the fourth pipeline 305, and the air inlet is located at the bottom of the inner tank 101; The temperature sensor 3042 collects the temperature of the medium in the third pipeline 304 in real time and sends it to the PID controller. When the PID controller finds that the medium temperature deviates from the preset threshold, it controls the electric regulating valve to change the opening degree to adjust the amount of tail gas entering the heat exchanger 2. Specifically, if the temperature is too low, the valve opening degree is increased to introduce more steam; if the temperature is too high, the opening degree is reduced to reduce the amount of tail gas entering, thereby forming a closed-loop regulation to ensure that the temperature of the medium in the third pipeline 304 is stable in the appropriate interval, achieving constant temperature control, and the temperature control accuracy is ±0.5℃. When the temperature deviation is >±2℃, the PID controller will control the electric regulating valve to be completely closed to cut off the heat source to avoid the impact of high-temperature or low-temperature air on the mycelium growth. After the medium in the third pipeline 304 enters the self-operated pressure reducing valve 3041, the pressure sensing element in the self-operated pressure reducing valve 3041 will monitor the pressure on the outlet side of the self-operated pressure reducing valve 3041 in real time and compare it with the preset pressure value. If the outlet pressure is lower than the set value, the pressure sensing element will drive the valve core to open to increase the airflow passage area to increase the pressure; if the pressure is higher than the set value, the valve core will be closed to reduce the pressure, and through this self-regulating mechanism, the outlet pressure is maintained at a stable level. At the same time, a safety relief valve is connected in parallel at the outlet pipeline of the pressure reducing valve. When the pressure exceeds the safety threshold due to abnormal conditions, the relief valve will automatically open to discharge the excess gas to the waste gas treatment system to prevent overpressure from damaging the pipeline or the fermentation tank 1. Through this dual mechanism of "active regulation + passive protection", the pressure of the compressed air is always stable during the entire process of being delivered to the fermentation tank, achieving constant pressure control, which not only meets the requirements of mycelium growth on the ventilation pressure, but also avoids the interference of pressure fluctuation on the gas-liquid mass transfer efficiency.

[0023] As shown in Figure 1 , Figure 2 , Figure 5 The filter assembly 5 includes a housing 501 and two-stage filters arranged in the housing 501. The two-stage filters include a front filter layer 502 made of polypropylene (PP) fibers for coarse filtration and a rear filter layer 503 made of polytetrafluoroethylene (PTFE) composite membrane for fine filtration, arranged from top to bottom.

[0024] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8As shown, the inner bottom of the inner tank 101 is fixedly provided with a gas feeding assembly 6 for feeding sterile air into the inner tank 101, the gas feeding assembly 6 comprises a fifth pipeline 601 connected with an air inlet and an annular pipe 602 connected with an air outlet of the fifth pipeline 601, a plurality of air outlets are formed in the annular pipe 602 of the gas feeding assembly 6, and the air outlets are uniformly distributed on the annular pipe 602 at equal intervals; a plurality of aeration assemblies 7 for increasing the gas-liquid contact area are arranged in each air outlet, the aeration assembly 7 comprises a first horn pipe 701 connected with the air outlet, the large end of the first horn pipe 701 is fixedly connected with the annular pipe 602 of the gas feeding assembly 6, the small end of the first horn pipe 701 is fixedly connected with one end of a narrow pipe 702, a waterproof and breathable film 704 is arranged between the first horn pipe 701 and the narrow pipe 702, the waterproof and breathable film 704 can prevent the fermentation liquid in the narrow pipe 702 from entering the first horn pipe 701, the end of the narrow pipe 702 away from the first horn pipe 701 is fixedly connected with the small end of a second horn pipe 703, a plurality of suction holes 7021 are formed in the narrow pipe 702, and a conical filter screen 708 for filtering large particles in the fermentation liquid is fixedly arranged in each suction hole 7021. The first horn pipe 701 is provided with a protective shell 705 connected with the first horn pipe 701, the protective shell 705 is rotatably provided with an air flow baffle 706 capable of rotating around a direction perpendicular to the central axis of the first horn pipe 701, and a flexible magnetic strip 707 for magnetically connecting with the air flow baffle 706 is fixedly arranged on the inner wall of the first horn pipe 701.

[0025] As shown in Figure 1 , Figure 4 A stirring assembly 8 is arranged in the inner tank 101, the stirring assembly 8 comprises a rotating shaft 801 capable of rotating around the central axis of the inner tank 101 in the inner tank 101 and a motor 802 for driving the rotating shaft 801 to rotate, and a plurality of blades 803 are arranged on the rotating shaft 801.

[0026] The working principle of the present application is as follows: the compressed air discharged by the compressor enters the compressed air pipeline 303 from the compressor, and then enters the heat exchanger 2 from the heated gas inlet 203. The tail gas generated during the fermentation process is pumped into the first pipeline 301 after being discharged from the tail gas outlet 1012 by the first gas pump 3011, at this time the tail gas temperature is usually above 80℃, and the tail gas heats the compressed air after entering the heat exchanger 2 from the heat source inlet 201.

[0027] After heat exchange, the tail gas flows out from the heat source outlet 202, at this time the temperature of the tail gas is usually less than or equal to 40℃, and the tail gas can enter the interlayer space of the liquid storage tank 4 from the second pipeline 302 to heat the fermentation liquid in the liquid storage tank 4, and can also enter the interlayer cavity 104 of the outer tank 103 from the inlet 1031 of the outer tank 103 to heat the fermentation tank 1. The tail gas discharged from the interlayer space of the liquid storage tank 4 and the interlayer cavity 104 enters the waste gas treatment system.

[0028] The temperature of the heated compressed air is 24-32℃, the heated compressed air from the heated gas outlet 204 of the heat exchanger 2 enters the filter assembly 5 through the third pipeline 304, first passes through the pre-filter layer 502 for rough filtration, then passes through the post-filter layer 503 for fine filtration, and is discharged from the gas outlet of the filter assembly 5, enters the fifth pipeline 601 from the air inlet of the inner tank 101 through the fourth pipeline 305, enters the annular pipe 602, and then enters the first horn pipe 701 from the gas outlet hole, sequentially passes through the first horn pipe 701, the narrow pipe 702, and the second horn pipe 703, and is discharged from the large end of the second horn pipe 703; In this process, based on the Venturi effect, a local negative pressure area is formed in the narrow pipe 702, so that the fermentation broth at the bottom of the inner tank 101 outside the aeration assembly 7 is sucked into the narrow pipe 702 from the suction hole 7021. The conical filter screen 708 in the suction hole 7021 can reduce the suction of impurities, mycelium and other large-particle solids in the fermentation broth into the narrow pipe 702, and the waterproof and breathable membrane 704 can allow sterile air to pass through but not liquid, thereby preventing the fermentation broth from flowing into the first horn pipe 701. The fermentation broth in the narrow pipe 702 collides violently with the high-speed airflow in the narrow pipe 702 and is sheared by the high-speed airflow, which greatly increases the gas-liquid contact area and overcomes the problem of high static pressure and weak dissolved oxygen driving force in traditional aeration. At the same time, the fermentation broth is sheared to produce a large number of micron-sized microbubbles, which have a larger total surface area than large bubbles generated by traditional sterile gas, providing a larger gas-liquid mass transfer interface and increasing the gas-liquid contact area. The slow upward velocity of the microbubbles increases the residence time of the microbubbles in the fermentation broth, providing sufficient oxygen for mycelium growth in time. In addition, because the aeration assembly 7 is uniformly distributed on the annular pipe 602, each aeration assembly 7 produces microbubbles, which ensures uniform release of sterile air and microbubbles throughout the cross-section of the inner tank 101 and eliminates local oxygen deficiency areas. The large number of uniformly distributed microbubble streams can effectively break up the newly formed small mycelium clusters during the upward process, preventing them from growing into large and dense mycelium balls, allowing the mycelium to grow into a more loose and relaxed form, maintaining miniaturization, and ensuring that each mycelium can fully contact the surrounding nutrients and oxygen. Multiple aeration assemblies 7 work simultaneously to create numerous efficient local gas-liquid mixing points, greatly improving the overall oxygen dissolution rate and uniformity in the inner tank 101, providing a globally consistent and short-board-free oxygen-rich environment for mycelium growth, and laying the foundation for high-speed and synchronous metabolism. Start the motor 802, the motor 802 drives the rotating shaft 801 to rotate, and the multiple blades 803 mechanically stir the fermentation broth, improving the fermentation effect in cooperation with the aeration assembly.

[0029] When there is no sterile air into the air baffle 706 and flexible magnetic strip 707 magnetic connection with the first horn tube 701 center axis perpendicular, when there is sterile air into the sterile air will push the air baffle 706 rotation, air baffle 706 rotation 360 ° back to the initial position after again be sterile air blowing, that is, the air baffle 706 will block the sterile air into once, thus generating a similar pulse airflow, in the high pressure pulse stage, narrow tube 702 text Churley effect is strong, injection and shear a large number of liquid, produce very fine micro bubble and turbulent flow; in the low pressure pulse stage, injection effect is weakened. This strong periodic change, itself greatly promotes the mass transfer, and strong pulse in the liquid produced a periodic pressure wave, this pressure wave will continue to compress and expand the bubble, make the gas-liquid boundary layer becomes extremely unstable, greatly strengthen the oxygen dissolution rate. Pulse "jet" and "back suction" effect, the formation of the local convection, let the tank liquid mixing more uniform and thorough, eliminate any nutrient concentration gradient, finally the periodic pulse shear force and stable shear force can form physical stimulation to mycelium, up-regulation of mycelium in the synthesis of secondary metabolites related enzyme activity, effectively prevent mycelium aging, autolysis, and continue to stimulate mycelium to maintain a vigorous production state.

Claims

1. An intelligent constant-pressure, constant-temperature, sterile air system for liquid fermentation of edible and medicinal fungal mycelia, characterized in that, It includes a fermentation tank (1), which includes an inner tank (101) and a lid (102) that matches the inner tank (101). The inner tank (101) is provided with an exhaust gas outlet (1012), and the outer tank (103) is provided with an inlet (1031) and an outlet (1032). The exhaust outlet (1012) is connected to the heat source inlet (201) of the heat exchanger (2), the heated gas inlet (203) of the heat exchanger (2) is connected to the compressed air pipeline (303) for conveying compressed air, the heated gas outlet (204) of the heat exchanger (2) is connected to the air inlet of the filter assembly (5) for sterile filtration of compressed air, and the air outlet of the filter assembly (5) is connected to the air inlet of the inner tank (101), which is located at the bottom of the inner tank (101).

2. The intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungal mycelia according to claim 1, characterized in that, An air delivery assembly (6) for delivering sterile air into the inner tank (101) is fixedly installed at the bottom of the inner tank (101).

3. The intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungal mycelia according to claim 2, characterized in that, The air supply assembly (6) includes a fifth pipe (601) connected to an air inlet and an annular pipe (602) connected to the air outlet of the fifth pipe (601).

4. The intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungal mycelia according to claim 2, characterized in that, The air supply assembly (6) is equipped with multiple aeration components (7) for increasing the gas-liquid contact area.

5. The intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungal mycelia according to claim 4, characterized in that, The aeration component (7) includes a first horn tube (701) connected to the air outlet. The large end of the first horn tube (701) is fixedly connected to the air supply component (6). The small end of the first horn tube (701) is fixedly connected to one end of the narrow tube (702). A waterproof and breathable membrane (704) is provided between the first horn tube (701) and the narrow tube (702). The end of the narrow tube (702) away from the first horn tube (701) is fixedly connected to the small end of the second horn tube (703). Multiple suction holes (7021) are provided on the narrow tube (702).

6. The intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungal mycelia according to claim 5, characterized in that, Each of the plurality of suction holes (7021) is fixedly installed with a conical filter screen (708) for filtering large solid particles in the fermentation broth.

7. The intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungal mycelia according to claim 5, characterized in that, A protective shell (705) connected to the first horn tube (701) is installed on the first horn tube (701). An airflow baffle (706) that can rotate around a direction perpendicular to the central axis of the first horn tube (701) is rotatably installed inside the protective shell (705). A flexible magnetic strip (707) for magnetic connection with the airflow baffle (706) is fixedly installed on the inner wall of the first horn tube (701).

8. The intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungal mycelia according to any one of claims 1 to 7, characterized in that, The heat exchanger (2) is a shell-and-tube heat exchanger or a plate heat exchanger.

9. The intelligent constant-pressure, constant-temperature, sterile air system for liquid fermentation of edible and medicinal fungal mycelia according to any one of claims 1 to 7, characterized in that, The filter assembly (5) includes a housing (501) and a two-stage filter disposed in the housing (501); The two-stage filter includes a pre-filter layer (502) for coarse filtration and a post-filter layer (503) for fine filtration, arranged from top to bottom.

10. The intelligent constant-pressure, constant-temperature, sterile air system for liquid fermentation of edible and medicinal fungal mycelia according to any one of claims 1 to 7, characterized in that, The inner tank (101) is provided with a stirring assembly (8), which includes a rotating shaft (801) that can rotate around the central axis of the inner tank (101) and a motor (802) for driving the rotating shaft (801) to rotate. Multiple blades (803) are installed on the rotating shaft (801).

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