Intelligent constant-pressure and constant-temperature sterile air system for liquid fermentation of edible and medicinal mushroom mycelium

Abstract

The present application relates to the field of device for microbiology, specifically relates to edible and medicinal fungus mycelium liquid fermentation intelligent constant pressure constant temperature sterile air system, the system includes fermentation tank;The tail gas outlet is opened on the inner tank, the inlet and outlet are opened on the outer tank;The tail gas outlet is communicated with the heat source inlet of heat exchanger, the heated gas inlet of heat exchanger is communicated with compressed air pipeline for conveying compressed air, the heated gas outlet of heat exchanger is communicated with the air inlet of filter assembly for sterile filtering compressed air, the air outlet of filter assembly is communicated with the air inlet of inner tank, and the air inlet is located at the bottom of inner tank.The existing edible and medicinal fungus mycelium liquid fermentation system has the problem of unstable mycelium culture effect, and the edible and medicinal fungus mycelium liquid fermentation intelligent constant pressure constant temperature sterile air system can make the mycelium culture effect more stable.

Description

Technical Field

[0001] This invention relates to the field of devices for microbiology, and more specifically to an intelligent constant-pressure, constant-temperature, sterile air system for liquid fermentation of edible and medicinal fungal mycelia. Background Technology

[0002] Edible and medicinal fungi are higher fungi with large fleshy or gelatinous fruiting bodies that have high nutritional and medicinal value. Wild collection alone cannot meet people's demand for edible and medicinal fungi, so people began to cultivate them artificially, and later cultivated them through fermentation.

[0003] Fermentation culture mainly includes three methods: solid-state fermentation, liquid fermentation, and mixed liquid fermentation, among which liquid fermentation is the most commonly used method. Liquid fermentation refers to the mass production of edible and medicinal fungi using mycelial balls or fermentation broth. Its process flow is as follows: test tube slant culture → shake flask culture → primary culture → secondary culture → tertiary culture → fermentation tank. The fermentation tank usually consists of a tank body, which is equipped with a sterile air inlet, a culture medium filling port, etc.

[0004] The sterile air inlet is installed on the tank because most edible and medicinal fungi are aerobic, such as Ganoderma lucidum, Grifola frondosa, Hericium erinaceus, Armillaria mellea, and Cordyceps militaris. During cultivation, a continuous flow of large amounts of sterile air is usually required to ensure normal growth of the fungi, and the temperature of the sterile air should not be lower than the fermentation temperature of the fungi (24-32℃). Sometimes, to promote growth, it needs to be 5-10℃ higher than the fermentation temperature. Currently, sterile air in fermenters is provided by air compressor systems, most of which lack heating components or only have an electric heater. Air compressor systems without heating components typically provide sterile air at around 20℃, which drops below 20℃ in areas where outdoor temperatures can drop below freezing, below the fermentation temperature of the fungi and detrimental to their growth. Air compressor systems with electric heaters consume a lot of energy and lack pressure control components, resulting in a high failure rate. In addition, if the mycelium is not interfered with during its growth, it will become a large mycelial ball. The core of the mycelial ball will lack nutrients and oxygen due to mass transfer resistance, becoming a "dead zone" and affecting the cultivation effect of edible and medicinal fungi.

[0005] Therefore, existing liquid fermentation systems for edible and medicinal fungi mycelia have the problem of unstable mycelial culture effects. Summary of the Invention

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

[0007] To solve the above-mentioned technical problems, the present invention provides an intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungi mycelia, comprising a fermentation tank, the fermentation tank including an inner tank and a tank cover matching the inner tank; the inner tank has an exhaust gas outlet, and the outer tank has an inlet and an outlet; the exhaust gas outlet is connected to the heat source inlet of a heat exchanger, the heated gas inlet of the heat exchanger is connected to a compressed air pipeline for conveying compressed air, the heated gas outlet of the heat exchanger is connected to the air inlet of a filter assembly for sterile filtration of compressed air, the air outlet of the filter assembly is connected to the 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 invention, an air supply assembly for supplying sterile air into the inner tank is fixedly installed at the bottom of the inner tank.

[0009] Preferably, the air supply assembly includes a fifth conduit connected to an air inlet and an annular pipe connected to an air outlet of the fifth conduit.

[0010] As a further improvement of the present invention, the air supply assembly is equipped with a plurality of aeration components for increasing the gas-liquid contact area.

[0011] Preferably, the aeration assembly includes a first horn tube connected to the air outlet, the large end of the first horn tube is fixedly connected to the air supply assembly, the small end of the first horn tube is fixedly connected to one end of the narrow tube, a waterproof and breathable membrane is provided between the first horn tube and the narrow tube, the end of the narrow tube away from the first horn tube is fixedly connected to the small end of the second horn tube, and multiple suction holes are provided on the narrow tube.

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

[0013] Preferably, a protective shell connected to the first horn tube is installed on the first horn tube, and an airflow baffle that can rotate around a direction perpendicular to the central axis of the first horn tube is rotatably installed inside the protective shell. A flexible magnetic strip for magnetic connection with the airflow baffle is fixedly installed on the inner wall of the first horn tube.

[0014] As a further improvement of the present invention: the heat exchanger is a shell-and-tube heat exchanger or a plate heat exchanger.

[0015] As a further improvement of the present invention: the filter assembly includes a housing and a two-stage filter disposed in the housing;

[0016] The two-stage filter consists of a pre-filter layer for coarse filtration and a post-filter layer for fine filtration, arranged from top to bottom.

[0017] As a further improvement of the present invention: an agitation assembly is provided in the inner tank, the agitation assembly including a rotating shaft that can rotate in the inner tank about the central axis of the inner tank and a motor for driving the rotating shaft to rotate, and multiple blades are mounted on the rotating shaft.

[0018] The beneficial effects of the present invention are as follows: The intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungi mycelia provided by the present invention can make the mycelial culture effect more stable and the quality better.

[0019] First, during liquid fermentation, mycelia produce a large amount of bio-fermentation exhaust gas. Bio-fermentation exhaust gas refers to the gaseous waste gas produced during the bio-fermentation process. Since fermentation is an exothermic reaction, bio-fermentation exhaust gas, as a system discharge, usually carries heat. In addition, in actual production, there are many fermentation tanks on the production line. For example, if four groups of fermentation tanks are actually arranged during production, with seven fermentation tanks in each group, then on a certain day, about four fermentation tanks on the production line are engaged in cultivation and fermentation production, while other fermentation tanks may be introduced with high-temperature steam for disinfection or sterilization, which will then generate steam exhaust gas. In this application, bio-fermentation exhaust gas and steam exhaust gas are collectively referred to as exhaust gas. This system utilizes exhaust gas to heat sterile air introduced into the fermenter. A temperature sensor is installed on the pipeline supplying the heated sterile air to monitor its temperature in real time. Based on this temperature, the system intelligently adjusts the exhaust gas flow rate to the heat exchanger, thus maintaining a constant temperature for the introduced sterile air. This system also makes full use of exhaust gas, making it relatively environmentally friendly. A self-regulating pressure reducing valve is installed on the pipeline supplying the heated sterile air. This valve intelligently regulates the pressure of the heated sterile air entering the inner tank based on its pressure, maintaining constant pressure. The temperature sensor monitors this pressure in real time, creating a favorable environment for mycelial growth and improving mycelial culture results.

[0020] Secondly, the system is equipped with an air supply component and an aeration component in the inner tank of the fermenter. Through the structure of the first trumpet tube, the narrow tube, and the second trumpet tube, based on the Venturi effect, a negative pressure area is formed in the narrow tube, which draws the surrounding fermentation liquid into the narrow tube and disperses it with sterile air. The liquid comes into full contact with sterile air and forms tiny bubbles that flow upward, so that the mycelium can come into full contact with sterile air, thereby improving the mycelium culture effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a top view of the present invention;

[0023] Figure 3 This is a schematic diagram of the overall structure of the fermenter and support in this invention;

[0024] Figure 4This is a partial cross-sectional schematic diagram of the fermenter in this invention;

[0025] Figure 5 This is a partial cross-sectional schematic diagram of the filtering component in this invention;

[0026] Figure 6 This is a schematic diagram showing the positional relationship between the air supply component and the aeration component in this invention;

[0027] Figure 7 This is a schematic diagram of the overall structure of the aeration component in this invention;

[0028] Figure 8 This is a partial cross-sectional schematic diagram of the aeration component in this invention;

[0029] The names of the components corresponding to the markings in the above figures are as follows: 1. Fermentation tank; 101. Inner tank; 1012. Tail gas outlet; 102. Tank lid; 103. Outer tank; 1031. Outlet; 1032. Inlet; 104. Jacket 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-regulating pressure reducing valve; 3042. Temperature... Degree sensor; 305, fourth pipe; 4, liquid storage tank; 5, filter assembly; 501, housing; 502, pre-filter layer; 503, post-filter layer; 6, air supply assembly; 601, fifth pipe; 602, annular pipe; 7, aeration assembly; 701, first horn pipe; 702, narrow pipe; 7021, suction hole; 703, second horn pipe; 704, waterproof and breathable membrane; 705, protective shell; 706, airflow baffle; 707, magnetic strip; 708, conical filter screen; 8, stirring assembly; 801, rotating shaft; 802, motor; 803, blades. Detailed Implementation

[0030] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0031] In this invention, the directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" are all used in conjunction with... Figure 2 The direction defined by the central cross-shaped directional marker is the reference. In this invention, all directional terms are described based on this definition and do not change the direction they represent regardless of the angle of the diagram.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the intelligent constant pressure and temperature sterile air system for liquid fermentation of edible and medicinal fungi mycelia provided by the present invention includes a fermentation tank 1. The fermentation tank 1 includes an inner tank 101 and a tank cover 102 that matches the inner tank 101. An outer tank 103 is fixedly sleeved on the outer tank 101, and a sandwich cavity 104 is formed between the outer tank 103 and the inner tank 101. An exhaust gas outlet 1012 is provided on the inner tank 101, and an inlet 1031 and an outlet 1032 are provided 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. Both the exhaust gas outlet 1012 and the outlet 1032 are connected to the heat source inlet 201 of the heat exchanger 2 through a first pipe 301. The heat exchanger 2 is a shell-and-tube heat exchanger or a plate heat exchanger. A first air pump 3011 and an electric regulating valve are installed on the first pipeline 301. The electric regulating valve is connected to a PID controller. The heat source outlet 202 of the heat exchanger 2 is connected to the air inlet of the storage tank 4 for storing concentrated liquid through the second pipeline 302. The storage tank 4 is a double-walled tank, with an interlayer space between the inner tank and the outer tank. The outer tank is provided with an air inlet and an air outlet, and the inner tank is provided with a liquid inlet and a liquid outlet. The heat source outlet 202 of the heat exchanger 2 is also connected to the inlet 1031 of the outer tank 103. The heated gas inlet 203 of the heat exchanger 2 is connected to the compressed air pipeline 303 for conveying compressed air. 03 The end away from the heat exchanger 2 is connected to the air outlet of the air compressor system. 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 through a third pipe 304. The third pipe 304 is equipped with a self-regulating pressure reducing valve 3041 for adjusting the flow rate of the medium in the third pipe 304 and a temperature sensor 3042 for monitoring the temperature of the medium in the third pipe 304. The temperature sensor 3042 is electrically connected to the PID controller. The air outlet of the filter assembly 5 is connected to the air inlet of the inner tank 101 through a fourth pipe 305. The air inlet is located at the bottom of the inner tank 101.

[0033] Temperature sensor 3042 collects the temperature of the medium in the third pipe 304 in real time and sends it to the PID controller. When the PID controller detects 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 exhaust 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 decreased to reduce the amount of exhaust gas entering, thus forming a closed-loop regulation to ensure that the temperature of the medium in the third pipe 304 is stable within a suitable range, achieving constant temperature control with a temperature control accuracy of ±0.5℃. When the temperature deviation is >±2℃, the PID controller will control the electric regulating valve to completely close, cutting off the heat source to avoid the impact of high or low temperature air on mycelial growth. After the medium in the third pipeline 304 enters the self-regulating pressure reducing valve 3041, the pressure sensing element in the self-regulating pressure reducing valve 3041 will monitor the pressure on the outlet side of the self-regulating 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 wider, increasing the airflow area to increase the pressure; if the pressure is higher than the set value, the valve core will close to reduce the pressure. Through this self-regulation mechanism, the outlet pressure is maintained at a stable level. At the same time, a safety relief valve is installed in parallel in 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, preventing overpressure from damaging the pipeline or fermenter 1. Through this dual mechanism of "active regulation + passive protection", the pressure of compressed air is ensured to remain stable throughout the entire process of being delivered to the fermenter, achieving constant pressure control. This satisfies the aeration pressure requirements for mycelial growth and avoids the interference of pressure fluctuations on gas-liquid mass transfer efficiency.

[0034] like Figure 1 , Figure 2 , Figure 5 As shown, 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 made of polypropylene (PP) fiber for coarse filtration and a post-filter layer 503 made of polytetrafluoroethylene (PTFE) composite membrane for fine filtration, arranged from top to bottom.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8As shown, an air supply assembly 6 for supplying sterile air into the inner tank 101 is fixedly installed at the inner bottom of the inner tank 101. The air supply assembly 6 includes a fifth pipe 601 connected to the air inlet and an annular pipe 602 connected to the air outlet of the fifth pipe 601. The annular pipe 602 of the air supply assembly 6 has multiple air outlets, which are evenly distributed and spaced on the annular pipe 602. Each air outlet is equipped with multiple aeration components 7 for increasing the gas-liquid contact area. The aeration component 7 includes a first trumpet pipe 701 connected to the air outlet. The large end of the first trumpet pipe 701 is connected to the air supply assembly 6. The annular tube 602 in the gas assembly 6 is fixedly connected. 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 waterproof and breathable membrane 704 can prevent the fermentation liquid in the narrow tube 702 from entering the first horn tube 701. 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 opened on the narrow tube 702. A conical filter screen 708 for filtering large solid particles in the fermentation liquid is fixedly installed in each of the multiple suction holes 7021. 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.

[0036] like Figure 1 , Figure 4 As shown, an agitator 8 is provided in the inner tank 101. The agitator 8 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 mounted on the rotating shaft 801.

[0037] The working principle of this invention is as follows: Compressed air discharged from 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 exhaust gas generated during the fermentation process is discharged from the exhaust gas outlet 1012 by the first air pump 3011 and then pumped into the first pipeline 301. At this time, the exhaust gas temperature is usually above 80°C. The exhaust gas enters the heat exchanger 2 from the heat source inlet 201 and heats the compressed air.

[0038] After heat exchange, the exhaust gas flows out from the heat source outlet 202. At this time, the temperature of the exhaust gas is usually less than or equal to 40°C. It can enter the interlayer space of the storage tank 4 through the second pipe 302 to keep the fermentation liquid in the storage tank 4 warm, and it can also enter the interlayer cavity 104 through the inlet 1031 of the outer tank 103 to keep the fermentation tank 1 warm. The exhaust gas discharged from the interlayer space of the storage tank 4 and the interlayer cavity 104 enters the waste gas treatment system.

[0039] The temperature of the heated compressed air is between 24℃ and 32℃. The heated compressed air enters the filter assembly 5 from the heated gas outlet 204 of the heat exchanger 2 through the third pipe 304. It first passes through the pre-filter layer 502 for coarse filtration, and then through the post-filter layer 503 for fine filtration. It is then discharged from the outlet of the filter assembly 5. It enters the fifth pipe 601 from the air inlet of the inner tank 101 through the fourth pipe 305, enters the annular pipe 602, and then enters the first trumpet pipe 701 through the outlet hole. It passes through the first trumpet pipe 701, the narrow pipe 702, and the second trumpet pipe 703 in sequence, and is discharged from the large end of the second trumpet pipe 703.

[0040] During this process, based on the Venturi effect, a local negative pressure zone will be formed in the narrow tube 702. Therefore, the fermentation liquid located at the bottom of the inner tank 101 outside the aeration component 7 will be sucked into the narrow tube 702 through the suction hole 7021. The conical filter 708 in the suction hole 7021 can reduce the large particles of solids such as impurities and mycelia in the fermentation liquid from being sucked into the narrow tube 702. The waterproof and breathable membrane 704 can allow sterile air to pass through but not liquid, thus preventing the fermentation liquid from flowing into the first trumpet tube 701. The fermentation liquid in the narrow tube 702 collides violently with the high-speed airflow in the narrow tube 702 and is sheared by the high-speed airflow. This process greatly increases the gas-liquid contact area and overcomes the problems of high static pressure and weak dissolved oxygen driving force at the bottom of traditional aeration. At the same time, after the fermentation liquid is sheared, it will generate a large number of microbubbles with extremely small micron-sized dimensions. Compared with the large bubbles generated by traditional sterile gas, microbubbles can provide a larger gas-liquid mass transfer interface due to their larger total surface area, thus increasing the gas-liquid contact area. Microbubbles rise slowly, increasing their residence time in the fermentation broth and providing sufficient oxygen for mycelial growth. Furthermore, because the aeration components 7 are evenly distributed on the annular pipe 602, each component generates microbubbles. This ensures that sterile air and microbubbles are evenly released across the entire cross-section of the inner tank 101, eliminating localized hypoxic areas. The abundant, evenly distributed microbubble flow effectively breaks up newly formed tiny mycelial clusters during their ascent, preventing them from growing into excessively large and dense mycelial balls. This allows the mycelium to grow into a looser, more expansive form, maintaining its miniaturization and ensuring that each mycelium has ample contact with surrounding nutrients and oxygen. The simultaneous operation of multiple aeration components 7 creates numerous highly efficient local gas-liquid mixing points, significantly improving the overall dissolved oxygen rate and uniformity within the inner tank 101. This provides a consistently oxygen-rich environment throughout the mycelial growth, laying the foundation for high-speed, synchronized metabolism. Start motor 802, which drives shaft 801 to rotate. Multiple blades 803 mechanically stir the fermentation liquid, which, together with the aeration components, improves the fermentation effect.

[0041] When no sterile air is introduced, the airflow baffle 706 is magnetically connected to the flexible magnetic strip 707 and is perpendicular to the central axis of the first horn tube 701. When sterile air is introduced, it pushes the airflow baffle 706 to rotate. After rotating 360°, the baffle 706 returns to its initial position and is blown by sterile air again. In other words, the airflow baffle 706 blocks the introduced sterile air once, thus generating a pulse-like airflow. During the high-pressure pulse phase, the Tully effect in the narrow tube 702 is extremely strong, entraining and shearing a large amount of liquid, generating extremely fine microbubbles and intense turbulence. During the low-pressure pulse phase, the entrainment effect weakens. This strong periodic change itself greatly promotes mass transfer, and the strong pulse generates periodic pressure waves in the liquid. These pressure waves continuously compress and expand the bubbles, making the gas-liquid boundary layer extremely unstable and greatly enhancing the oxygen dissolution rate. The "jet" and "backflow" effects of the pulses create intense local convection, making the liquid in the tank mix more evenly and thoroughly, eliminating any nutrient concentration gradient. Finally, the periodic pulse shear force and stable shear force can physically stimulate the mycelium, upregulate the activity of enzymes related to the synthesis of secondary metabolites in the mycelium, effectively prevent mycelial aging and autolysis, and continuously stimulate the 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). An air supply assembly (6) for supplying sterile air into the inner tank (101) is fixedly installed at the inner bottom of the inner tank (101); the air supply assembly (6) includes a fifth pipe (601) connected to the air inlet and an annular pipe (602) connected to the air outlet of the fifth pipe (601). The air supply component (6) is equipped with multiple aeration components (7) for increasing the gas-liquid contact area; 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), and multiple suction holes (7021) are opened on the narrow tube (702). 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).

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, 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.

3. 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 2, characterized in that, The heat exchanger (2) is a shell-and-tube heat exchanger or a plate heat exchanger.

4. 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 2, 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.

5. 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 2, 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).

Images