Edible mushroom culture medium raw material production equipment and process

Abstract

The application discloses an edible mushroom culture medium raw material production device and process, and belongs to the technical field of edible mushroom production devices. The device takes a closed stirring axe as a core operation cavity, is provided with feeding, exhaust, steam sterilization, surrounding cooling, sterile air supplementing and closed discharging functions, is matched with a high-temperature and high-pressure steam generator, a cooling circulating device and an air purification device, and realizes closed and sterile operation in the whole process. The device adopts a servo pulley transmission stirring structure, can uniformly turn and throw materials in the whole process, and the side wall sandwiched cooling bin realizes global closed loop uniform cooling. The matched air purification device has three-stage filtering and ozone concentration dynamic proportioning functions, can supplement sterile ozone gas when the cavity is under negative pressure, and avoids secondary bacterial contamination caused by external air backflow.

Description

Technical Field

[0001] This invention relates to the field of edible fungi raw material production technology, specifically to edible fungi culture medium raw material production equipment and process. Background Technology

[0002] Edible mushroom culture medium is the core raw material for edible mushroom cultivation and production. The sterility, material uniformity, and nutritional integrity of the culture medium directly determine the survival rate, growth status, and final yield and quality of the edible mushroom spawn. Current traditional production processes mostly employ open feeding and processing methods, with equipment having limited functionality and failing to achieve a fully enclosed operation encompassing sterilization, mixing, cooling, pressurization, and discharging. After cooling, negative pressure easily forms in the equipment cavity; without a dedicated aseptic pressurization structure, when the discharge port is opened, outside bacteria-laden air can quickly flow back in, causing secondary contamination. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides equipment and processes for producing raw materials for edible fungi culture media, thus solving some of the existing background technology problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: Edible mushroom culture medium raw material production equipment, the equipment comprising a stirring axe, a cooling circulation device, a high-temperature and high-pressure steam generator, and an air purification device. The upper surface of the stirring axe is provided with a feed inlet and a vent, and a feed control valve and a vent control valve are respectively installed in the feed inlet and the vent. The bottom of the stirring axe is provided with a discharge outlet, and a discharge control valve is installed inside the discharge outlet. The side wall of the stirring axe is provided with a cooling chamber. The upper and lower ends of the cooling chamber are respectively connected to a cooling medium outlet and a cooling medium inlet. The cooling medium outlet and the cooling medium inlet are respectively connected to the input end and the output end of the cooling circulation device through pipe A. The bottom of the stirring axe is also provided with a high-temperature and high-pressure gas inlet. The interior of the high-temperature and high-pressure gas inlet is equipped with a steam control valve. The outer end of the high-temperature and high-pressure gas inlet is connected to the output end of the high-temperature and high-pressure steam generator through pipe B. A drive shaft is rotatably mounted through the middle of the upper surface of the stirring axe, and a stirring assembly is fixedly mounted at the lower end of the drive shaft. A drive assembly for driving the drive shaft to rotate is provided on the upper surface of the stirring axe. The upper surface of the stirring axe is also provided with a pressure relief port, and the outer end of the pressure relief port is connected to a pressure relief valve; The upper surface of the stirring axe is also provided with an air inlet. One end of the air inlet is connected to an air supply control valve, and the other end of the air supply control valve is connected to an air purification device through pipe C.

[0005] Preferably, the air purification device includes a main body, with a piston chamber and a filter chamber connected to each other on the upper and lower sides of the main body. A ventilation control valve is provided between the piston chamber and the filter chamber. A piston chamber intake / exhaust port is provided at the end of the piston chamber away from the filter chamber. An air intake / exhaust pump is connected to the outer end of the piston chamber intake / exhaust port. A gas inlet is connected to the end of the filter chamber away from the piston chamber. A piston is movably assembled inside the piston chamber. An air filtration assembly is provided inside the filter chamber. An ozone generator is fixedly assembled inside the main body. The output end of the ozone generator is connected to the bottom of the piston chamber through a pipe D. An ozone intake control valve is provided on the pipe D. One side of the bottom of the piston chamber is connected to a pipe C.

[0006] Preferably, the lower surface of the piston has a groove, and an ozone concentration sensor is fixedly mounted in the groove.

[0007] Preferably, the air filtration assembly includes a pre-filter, a medium-efficiency filter, and a high-efficiency filter arranged in sequence.

[0008] Preferably, the inner wall of the filter chamber is provided with three sliding grooves, and the pre-filter, medium-efficiency filter and high-efficiency filter are all plate-type air filters. The pre-filter, medium-efficiency filter and high-efficiency filter are slidably assembled in the corresponding sliding grooves. The outer wall of the main body is provided with openings at the positions corresponding to the sliding grooves for the pre-filter, medium-efficiency filter and high-efficiency filter to pass through.

[0009] Preferably, the drive assembly includes a drive motor fixedly mounted on the upper surface of the stirring axe, the output shaft of the drive motor is fixedly fitted with a drive pulley, the top of the drive shaft is fixedly fitted with a driven pulley, and the drive pulley and the driven pulley are driven by a belt.

[0010] Preferably, the stirring assembly is a spiral stirring paddle, the drive motor is a servo motor, and the cooling circulation device is an air circulation refrigeration device.

[0011] Preferably, a number of temperature sensors are fixedly mounted on the inner sidewall of the stirring axe.

[0012] The process for producing raw materials for edible fungi culture media, applied to the edible fungi culture media raw material production equipment described in any one of the above-mentioned methods, includes the following steps: S1. The edible fungus culture medium raw material, which has been sterilized and disinfected by high concentration ozone water, is put into the inside of the stirring axe through the feed inlet. After the raw material is fed, the feed control valve is closed so that the stirring axe forms an initial closed cavity structure to prepare for the subsequent sterilization operation. S2. Start the high-temperature and high-pressure steam generator and steam control valve, and at the same time open the exhaust control valve of the exhaust port. High-temperature and high-pressure steam is continuously introduced into the agitator to preheat the raw materials. When the temperature inside the agitator reaches 100°C, close the exhaust control valve and seal the exhaust channel of the agitator. S3. High-temperature and high-pressure steam is continuously introduced into the agitator through a high-temperature and high-pressure steam generator to stabilize the temperature of the raw materials inside the agitator at 120℃ and sterilize them at a constant temperature for 60-90 minutes. During the entire constant temperature sterilization process, the agitator component rotates continuously to carry out the sterilization operation. S4. After the sterilization operation is completed, turn off the high-temperature and high-pressure steam generator and close the one-way valve of the high-temperature and high-pressure gas inlet to cut off the steam input; start the cooling circulation device to continuously circulate and deliver cooling air into the cooling chamber through the cooling medium inlet and cooling medium outlet to cool the raw materials inside the agitator in a sealed manner; when the temperature inside the agitator is stably reduced to the range of 22-25℃, turn off the cooling circulation device and stop the circulation cooling operation. S5. After cooling is complete, open the gas replenishment control valve to allow the sterile ozone mixture, which has undergone multi-stage filtration and ozone sterilization treatment in the piston chamber, to be smoothly introduced into the stirring axe through pipe C. This compensates for the air pressure difference formed after the internal cooling of the stirring axe and maintains the air pressure balance in the chamber. The stirring components continue to stir throughout the entire pressurization process. Then, open the discharge control valve at the discharge port to smoothly discharge the sterilized edible fungus culture medium raw material, completing the entire raw material preparation process. Beneficial effects

[0013] This invention provides equipment and process for producing raw materials for edible fungi culture media. It has the following beneficial effects: The core utilizes an integrated, sealed mixing chamber with six functional structures: controllable feeding, exhaust, steam intake, cooling heat exchange, aseptic gas replenishment, and sealed discharge. Each port is equipped with a dedicated control valve, enabling a completely open and exposed process from feeding, heating and exhausting, high-pressure sterilization, cooling, pressurization, to discharge. During the cooling phase, the entire process is completely sealed with no airflow. Under negative pressure, an air purification device replenishes the pressure with a sterile ozone mixture, solving the problems of negative pressure backflow and external microbial contamination during cooling and discharge in traditional processes. Equipped with an integrated air purification system, this device features a three-stage plate filtration structure (pre-filter, medium-efficiency filter, and high-efficiency filter) to thoroughly trap dust, bacteria, spores, and suspended impurities in the air, resulting in highly clean air. It also incorporates an ozone generation, concentration monitoring, and dynamic mixing system. An ozone concentration sensor provides real-time feedback on the gas concentration, dynamically adjusting the ozone intake to precisely mix a sterile ozone gas mixture, providing both pressure stabilization and continuous antibacterial effects. Furthermore, the filter components utilize a sliding disassembly structure for quick removal, cleaning, and replacement, solving the maintenance difficulties and eventual failure issues of traditional integrated filter structures. This significantly reduces equipment maintenance costs and ensures long-term, stable filtration and antibacterial performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall front view structure of Embodiment 1 of the present invention.

[0015] Figure 2 This is a schematic diagram of the internal structure of the stirring axe in Embodiment 1 of the present invention.

[0016] Figure 3 This is a top view of the stirring axe in Embodiment 1 of the present invention.

[0017] Figure 4 This is a schematic diagram of the internal structure of the main body in Embodiment 1 of the present invention.

[0018] Figure 5 This is a top view of the overall structure in Embodiment 2 of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0021] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical connections between the various electrical components are completed in sequence. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0022] Example 1, please refer to Figure 1-4 The present invention provides a technical solution: This invention relates to a raw material production equipment for edible fungi culture media. The core component is a stirring axe 1, which serves as a sealed operating chamber for sterilization, stirring, and heat exchange of the raw materials. The stirring axe 1 has a feed inlet 5, an exhaust outlet, an air inlet 21, a pressure relief outlet 19, and a drive assembly 18 at its top, and a discharge outlet 9 and a high-temperature steam inlet 14 at its bottom. The side walls have a built-in jacketed cooling structure, achieving fully sealed and controllable operation throughout the chamber. The feed inlet is equipped with a feed control valve 7, enabling sealed feeding and post-feeding isolation to prevent external bacteria from entering the chamber. The exhaust outlet is equipped with an exhaust control valve 8, which allows air to be discharged from the stirring axe 11 during the heating phase. The discharge outlet is equipped with a discharge control valve 10, enabling clean and sealed discharge after processing.

[0023] The mixing axe 1 has an integrated cooling chamber 11 inside its side wall. Cooling medium outlet 12 and cooling medium inlet 13 are respectively located at the upper and lower ends of the cooling chamber 11. These two ports are connected to the cooling circulation device 2 via pipe A, forming a closed-loop connection. During operation, the cooling circulation device 2 outputs a low-temperature cooling medium, which enters the cooling chamber through the cooling medium inlet 13. This medium provides uniform heat exchange to the material inside the mixing axe 1 cavity. After the medium has heated up, it flows back to the cooling circulation device 2 through the cooling medium outlet 12 for re-cooling and recirculation, achieving continuous closed-loop cooling. Compared to traditional single-point cooling methods, this structure provides more uniform cooling without localized temperature differences, effectively preventing problems such as localized water accumulation, deterioration, and uneven drying of raw materials.

[0024] The bottom of the stirring axe 1 is equipped with a high-temperature, high-pressure gas inlet 14, and a steam control valve 15 is installed at the inlet end. A one-way valve can be installed inside the high-temperature, high-pressure gas inlet 14 to prevent raw materials from entering the steam control valve 15. The on / off state and intake volume of the high-temperature, high-pressure steam can be precisely controlled. The outer end of the high-temperature, high-pressure gas inlet 14 is connected to the high-temperature, high-pressure steam generator 3 through pipe B, and the steam input end is connected to the high-temperature, high-pressure steam generator 3. During sterilization, the high-temperature, high-pressure steam is continuously and controllably introduced to create a high-temperature, high-pressure sterilization environment inside the stirring axe 1.

[0025] A drive shaft 16 is mounted through the center of the top surface of the stirring axe 1, with a stirring assembly 17 fixedly installed at the lower end of the drive shaft 16. An independent drive assembly 18 is also provided at the top. The drive assembly 18 adopts a motor-pulley transmission structure, with a servo motor as the power source. The output end of the drive motor 181 is fixed with a drive pulley 182, and the top of the drive shaft 16 is fixed with a driven pulley 183. Flexible transmission is achieved between the drive pulley 182 and the driven pulley 183 via a belt. The servo motor can achieve precise speed adjustment, stable operation, and smooth start and stop, and can adapt to the continuous stirring requirements of the entire process of sterilization, cooling, pressurization, and material discharge. The stirring assembly adopts a spiral stirring paddle structure, which has a large stirring coverage area and good tumbling effect. It can continuously disperse, tumble, and homogenize the raw materials, effectively preventing the raw materials from caking and piling up during high-temperature sterilization, ensuring full contact between steam, cooling airflow, sterile ozone gas and the raw materials, and greatly improving the sterilization uniformity and material processing consistency.

[0026] The top surface of the agitator 1 is also independently equipped with a pressure relief port 19 and an air supply port 21. The pressure relief port 19 is equipped with a pressure relief valve 20, which can automatically release pressure when the pressure inside the agitator 1 is abnormally high, ensuring the safe operation of the equipment and avoiding the risk of high-pressure chamber explosion. The air supply port 21 is equipped with an air supply control valve 22, which is connected to the air purification device 4 through pipe C. The air supply control valve 22 is connected to the air purification device 4 externally, and can accurately replenish sterile purified ozone gas when the raw material has cooled down and the chamber has formed a negative pressure, balancing the air pressure inside the agitator 1, preventing the backflow of external bacteria-laden air under negative pressure, and completely solving the industry problem of secondary contamination after sterilization and cooling.

[0027] Multiple temperature sensors 23 are evenly distributed on the inner wall of the stirring axe 1 to collect the temperature of the material inside the stirring axe 1 in real time at multiple points. It can be used in conjunction with the high-temperature and high-pressure steam generator 3 and the cooling circulation device 2 to achieve closed-loop temperature control, ensuring that the sterilization temperature is accurate and constant and the cooling temperature is accurate and controllable, effectively improving the accuracy of equipment automation control and the stability of product batches.

[0028] The air purification device 4 matched with this apparatus is an integrated purification ozone device, which is mainly composed of a filter chamber 43, a piston chamber 42, an air suction and inflation pump 46, an ozone generator 411 and a multi-stage air filter assembly 49. The main body 41 is internally provided with the filter chamber 43 and the piston chamber 42 in communication in the vertical direction, a controllable vent control valve 44 is arranged between the two chambers, and a piston 48 is movably assembled inside the piston chamber 42, so that the filtering, gas storage and ozone mixing processes can be carried out step by step in a controllable manner. When the vent control valve is opened and the air suction function of the air suction and inflation pump 46 is activated, outside air enters the filter chamber 43 through the gas inlet 47, and after multi-stage filtration, impurities, sundry bacteria, spores and dust are completely trapped, and clean air enters the piston chamber for storage. The top and bottom of the inner side wall of the piston chamber 42 are both provided with touch switches. When the upper surface of the piston 48 touches the top touch switch, the air suction function of the air suction and inflation pump 46 stops, and the vent control valve 44 is closed, so that the filtered and sterilized gas is stored in the piston chamber 42. When the gas supply control valve is opened and the inflation function of the air suction and inflation pump 46 is activated, the piston moves downward, the filtered and sterilized gas in the piston chamber 42 is supplemented into the stirring tank 1 through the pipeline C, and when the lower surface of the piston touches the bottom touch switch, the air suction and inflation pump 46 stops the inflation and suction function.

[0029] Three stages of air filter assemblies 49 are assembled inside the filter chamber 43, with a primary filter 491, a medium-efficiency filter 492 and a high-efficiency filter 493 arranged in sequence. All three layers of filters adopt a plate-type filter structure. The inner side wall of the filter chamber 43 is provided with a corresponding number of chutes, each filter is slidably assembled inside the chute, and a disassembly and assembly opening is provided at the corresponding position on the side wall of the main body 41. This sliding disassembly and assembly structure facilitates daily disassembly, cleaning, replacement and maintenance of the filters, effectively solves the problems of difficult maintenance of the traditional integrated filter structure and overall scrapping after the filter screen is blocked, greatly reduces the operation and maintenance cost of the apparatus, and ensures long-term stable filtration accuracy at the same time.

[0030] A piston structure is movably assembled inside the piston chamber 42, and the piston 48 can be moved downward or upward by the end air suction and inflation pump 46 to perform pressure stabilization, gas storage, pushing and output operations on the clean gas inside the piston chamber 42. A groove 413 is formed on the lower surface of the piston 48, and an ozone concentration sensor 414 is fixedly installed inside the groove 413, which can monitor the concentration of the ozone mixed gas inside the piston chamber 42 in real time to realize real-time concentration feedback. A receiving groove 410 is formed on the outer side of the main body 41, and an ozone generator 411 is fixedly assembled therein. The output end of the ozone generator 411 is communicated with the piston chamber 42 through a pipeline D, and an ozone intake control valve 412 is arranged on the pipeline D, which can dynamically adjust the ozone intake amount according to the monitoring data of the sensor, precisely proportion the concentration of the sterile ozone mixed gas, and ensure the stable and controllable gas replenishment and bacteriostasis effect.

[0031] A process for producing edible fungi culture medium raw materials is disclosed, which is adapted to specialized equipment for integrated aseptic preparation. The entire set of equipment mainly consists of a stirring axe 1, a cooling circulation device 2, a high-temperature and high-pressure steam generator 3, and an air purification device 4. The stirring axe 1 serves as the core reaction chamber, equipped with functions for feeding, venting, steam sterilization, closed cooling, aseptic gas replenishment, and discharging. Combined with an external cooling circulation structure, a high-temperature steam generation structure, and a multi-stage filtration ozone purification structure, it achieves fully closed, fully controllable, and fully aseptic production of culture medium raw materials from feeding to discharging. This solves the industry pain points of traditional culture medium preparation processes, such as incomplete sterilization, easy clumping of raw materials, susceptibility to bacterial contamination during cooling, and unstable batch quality.

[0032] During operation, the entire production equipment features a feeding structure at the top for material input and an exhaust structure for venting and depressurization, and a finished product discharge structure and steam intake structure at the bottom. A built-in surround cooling chamber on the side wall ensures uniform heat exchange and cooling throughout the chamber. A servo-driven belt-driven stirring mechanism at the top of the stirring axe enables continuous and uniform stirring throughout the process, ensuring even distribution of raw materials, uniform heating, and sufficient gas-liquid contact. The air purification device incorporates a multi-stage plate filter structure, a piston pressure regulating chamber, and an ozone generator, providing three-stage precision filtration of external air and mixing a measured amount of ozone to form a sterile protective gas. This gas is used to replenish negative pressure in the chamber after cooling, preventing the intrusion of external bacteria. Multiple temperature sensors are installed on the inner wall of the stirring axe to accurately collect the temperature of the materials inside the chamber in real time, enabling precise closed-loop control of heating and cooling.

[0033] Based on the aforementioned specialized equipment, the production process of edible fungi culture medium raw materials of the present invention includes five continuous processes: closed feeding, pretreatment by heating and exhaust, constant temperature and high pressure sterilization, closed-loop cooling, and aseptic pressurization discharge. Each process is connected in a closed loop with no open or exposed links. The specific implementation process is as follows.

[0034] The first step is the closed-loop feeding operation. The prepared edible fungi solid culture medium raw materials are pre-wetted with high-concentration ozone water until the moisture content is between 58% and 62% to sterilize the raw materials. When the moisture content of the raw materials and auxiliary materials is less than 58%-62% during mixing, high-concentration ozone water is added and fed into the chamber through the top feeding structure of the agitator. The amount of material fed is quantitative according to the production batch requirements. After feeding, the feeding control valve is completely closed, creating a completely sealed, independent working chamber inside the agitator, isolating it from external air, dust, and bacterial spores. After feeding, the top drive motor is started in advance. The internal spiral agitator rotates continuously at low speed through the active pulley, belt, and driven pulley, quickly loosening and flattening the piled-up raw materials. This prevents the materials from clumping and layering, providing a good material condition for subsequent steam penetration and uniform heating sterilization, ensuring uniform overall porosity and no compacted dead zones.

[0035] The second step is the pre-treatment process of heating and exhaust. After the material preparation is completed, the high-temperature and high-pressure steam generator is started, the steam inlet control valve is opened, and the top exhaust control valve is opened simultaneously, allowing high-temperature and high-pressure steam to continuously flow into the mixing axe chamber. The high-temperature steam introduced in the initial stage can quickly replace the room-temperature air, moisture, and suspended particles of bacteria mixed in the gaps of the raw materials inside the chamber, avoiding the accumulation of cold air that causes uneven internal temperature gradients and prevents steam from quickly penetrating the material, resulting in local sterilization failure. The temperature sensor on the inner wall of the equipment collects the real-time temperature of the material, dynamically monitoring the overall temperature rise in the chamber throughout the process. Once the overall temperature of the material inside the chamber stabilizes at 100℃ without significant fluctuations, the exhaust control valve is immediately closed, completely sealing the chamber's exhaust channel, allowing the mixing axe to enter a closed, pressurized, and heated state.

[0036] The third step is constant temperature and high pressure sterilization. After the chamber is sealed, high-temperature and high-pressure steam is continuously and stably introduced. A temperature sensor provides real-time feedback to adjust the steam input, precisely and consistently controlling the temperature of the materials inside the chamber at 121℃, with temperature fluctuations strictly controlled within ±1℃, ensuring stable sterilization temperature. This invention employs differentiated constant temperature and pressure holding times for edible fungi culture media raw materials with varying physicochemical properties, effectively adapting to the sterilization requirements of different raw materials. For hard raw materials such as sawdust and cottonseed hulls, which are hard, dense, have small pores, and are difficult for steam to penetrate, the constant temperature sterilization time is set to 80 to 90 minutes, ensuring that high-temperature steam fully penetrates the material and thoroughly kills bacteria, mold, and spores hidden deep within. For soft raw materials such as bran and grains, which are loose, have large pores, and conduct heat quickly, the constant temperature sterilization time is set to 60 to 90 minutes, ensuring complete sterilization while avoiding excessive loss of nutrients due to prolonged high temperatures. Throughout the entire constant temperature sterilization cycle, the stirring paddle continuously and at a constant speed stirs, constantly turning, breaking up, and tossing the materials, ensuring that each part of the raw materials can continuously and fully contact the high-temperature steam. This completely eliminates problems such as local low-temperature dead zones and material clumping that exist in static sterilization, and greatly improves the overall sterilization uniformity and sterilization qualification rate.

[0037] The fourth step is closed-loop cooling. After the constant-temperature sterilization time reaches the target, the high-temperature, high-pressure steam generator and steam control valve are shut off sequentially to completely cut off the steam input path and stop the heating inside the chamber. Then, the air-circulating cooling system is activated, and the low-temperature cooling medium continuously enters the surrounding cooling chamber on the side wall of the agitator, forming a continuous closed-loop heat exchange structure inside the chamber. This uniformly cools the high-temperature material inside the chamber from all directions along the side wall. The entire cooling process is completely sealed, with no external openings, completely preventing external bacteria and dust from re-entering and contaminating the material during the cooling phase. Multi-point temperature sensors on the inner wall collect the material temperature in real time, dynamically monitoring the cooling rate and the overall temperature uniformity of the material. Once the overall material temperature has stabilized and dropped to the suitable inoculation temperature range of 22°C to 25°C, the cooling circulation system is shut off, stopping the cooling and heat exchange operation.

[0038] Step 5: Aseptic pressurization and stabilization discharge. During the sealed cooling process, the gas inside the cavity undergoes thermal contraction as the temperature decreases, creating a negative pressure inside the cavity. If the discharge structure is opened directly, outside bacteria-laden air will quickly flow back into the cavity, causing secondary contamination of the sterilized material. Therefore, after cooling is completed, the air replenishment control valve 22 is opened, and the air pump 46 is activated to start the air purification device.

[0039] Ambient air can be pre-activated, first entering the filtration chamber through the air inlet. It then undergoes three stages of precision filtration: pre-filter, medium-efficiency filter, and high-efficiency filter, thoroughly removing dust, bacteria, fungal spores, and suspended impurities to achieve high-cleanliness air. This clean air then enters the piston chamber, where a metered amount of ozone gas is simultaneously produced by the ozone generator and introduced into the piston chamber. This gas mixes thoroughly with the clean air, forming a sterile ozone mixture with antibacterial and bactericidal capabilities for storage. The piston moves downwards via the air pump, smoothly replenishing the sterile ozone mixture into the stirring chamber, gradually compensating for negative pressure differences and restoring pressure balance within the chamber. Simultaneously, trace amounts of ozone continuously maintain a sterile environment within the chamber. Throughout the entire process of replenishment and pressure stabilization, the stirring mechanism continuously agitates at low speed, ensuring uniform gas distribution and stable, loose material within the chamber, preventing localized heat and moisture accumulation. Once the chamber pressure stabilizes and the internal aseptic environment meets the standards, the bottom discharge control valve is opened to smoothly discharge the fully sterilized, uniformly cooled, and aseptically protected edible fungi culture medium raw materials, completing the entire integrated aseptic preparation process. A programmable logic controller (PLC) can be used to control each piece of equipment and valves, achieving automated production.

[0040] Example 2, please refer to Figure 5The difference between this embodiment and Embodiment 1 is that the stirring axe is placed in the bedroom. In this embodiment, the stirring vessel 1 adopts a horizontal arrangement structure, and the axial direction of the stirring vessel 1 is arranged horizontally. The drive assembly 18 is arranged at one end of the stirring vessel 1, and the output end of the drive assembly 18 extends horizontally into the cavity of the stirring vessel 1, driving the horizontally arranged stirring assembly 5 to rotate and stir along the axial direction of the vessel body. The feed inlet is located at the top of the side wall of the stirring vessel 1. The remaining structures in this embodiment, such as the exhaust port, pressure relief port, air supply port, steam intake structure, temperature sensor, air purification device 4, and high-temperature and high-pressure steam generator 3, are consistent with the configuration and connection relationship of Embodiment 1.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Equipment for producing raw materials for edible fungi culture medium, the equipment including a stirring axe (1), a cooling circulation device (2), a high-temperature and high-pressure steam generator (3), and an air purification device (4), characterized in that: The upper surface of the stirring axe (1) is provided with a feed inlet (5) and an exhaust outlet. The feed inlet (5) and the exhaust outlet are respectively equipped with a feed control valve (7) and an exhaust control valve (8). The bottom of the stirring axe (1) is provided with a discharge outlet (9). The discharge outlet (9) is equipped with a discharge control valve (10). The stirring axe (1) has a cooling chamber (11) inside its side wall. The cooling chamber (11) is connected to a cooling medium outlet (12) and a cooling medium inlet (13) at its upper and lower ends, respectively. The cooling medium outlet (12) and the cooling medium inlet (13) are connected to the input and output ends of the cooling circulation device (2) through pipe A, respectively. The bottom of the stirring axe (1) is also provided with a high temperature and high pressure gas inlet (14), and the interior of the high temperature and high pressure gas inlet (14) is provided with a steam control valve (15). The outer end of the high temperature and high pressure gas inlet (14) is connected to the output end of the high temperature and high pressure steam generator (3) through pipe B. A drive shaft (16) is rotatably mounted through the middle of the upper surface of the stirring axe (1), and a stirring assembly (17) is fixedly mounted at the lower end of the drive shaft (16). A drive assembly (18) for driving the drive shaft to rotate is provided on the upper surface of the stirring axe (1). The upper surface of the stirring axe (1) is also provided with a pressure relief port (19), and the outer end of the pressure relief port (19) is connected to a pressure relief valve (20). The upper surface of the stirring axe (1) is also provided with an air inlet (21). The outer end of the air inlet (21) is connected to one end of an air supply control valve (22), and the other end of the air supply control valve (22) is connected to the air purification device (4) through a pipe C.

2. The edible fungi culture medium raw material production equipment according to claim 1, characterized in that, The air purification device (4) includes a main body (41). Inside the main body (41), on the upper and lower sides, are connected piston chambers (42) and filter chambers (43). A ventilation control valve (44) is provided between the piston chambers (42) and the filter chambers (43). At the end of the piston chamber (42) away from the filter chamber (43), there is a piston chamber intake / exhaust port (45). An air intake / exhaust pump (46) is connected to the outer end of the piston chamber intake / exhaust port (45). At the end of the filter chamber (43) away from the piston chamber (42), there is a gas inlet. 47), a piston (48) is movably mounted inside the piston chamber (42), an air filter assembly (49) is provided inside the filter chamber (43), a receiving groove (410) is provided on the main body (41), an ozone generator (411) is fixedly mounted inside the receiving groove (410), the output end of the ozone generator (411) is connected to the bottom of the piston chamber (42) through a pipe D, an ozone intake control valve (412) is provided on the pipe D, and one side of the bottom of the piston chamber (42) is connected to the pipe C.

3. The edible fungi culture medium raw material production equipment according to claim 2, characterized in that, The piston (48) has a groove (413) on its lower surface, and an ozone concentration sensor (414) is fixedly installed in the groove (413).

4. The edible fungi culture medium raw material production equipment according to claim 2, characterized in that, The air filtration assembly (49) includes a pre-filter (491), a medium-efficiency filter (492), and a high-efficiency filter (493) arranged in sequence.

5. The edible fungi culture medium raw material production equipment according to claim 4, characterized in that, The inner wall of the filter chamber (43) is provided with three sliding grooves. The pre-filter (491), medium-efficiency filter (492) and high-efficiency filter (493) are all plate air filters. The pre-filter (491), medium-efficiency filter (492) and high-efficiency filter (493) are respectively slidably assembled in the corresponding sliding grooves. The outer wall of the main body (41) is provided with openings at the positions corresponding to the sliding grooves for the pre-filter (491), medium-efficiency filter (492) and high-efficiency filter (493) to pass through.

6. The edible fungi culture medium raw material production equipment according to claim 1, characterized in that, The drive assembly (18) includes a drive motor (181) fixedly mounted on the upper surface of the stirring axe (1). The output shaft of the drive motor (181) is fixedly fitted with a drive pulley (182), and the top of the drive shaft (18) is fixedly fitted with a driven pulley (183). The drive pulley (182) and the driven pulley (183) are driven by a belt.

7. The edible fungi culture medium raw material production equipment according to claim 6, characterized in that, The stirring assembly (17) is a spiral stirring paddle, the drive motor (181) is a servo motor, and the cooling circulation device (2) is an air circulation refrigeration device.

8. The edible fungi culture medium raw material production equipment according to claim 1, characterized in that, Several temperature sensors (23) are fixedly mounted on the inner wall of the stirring axe (1).

9. The production process of raw materials for edible fungi culture medium, characterized in that, The equipment for producing edible fungi culture medium raw materials according to any one of claims 1-8 comprises the following steps: S1. The raw materials of edible fungi culture medium sterilized by high concentration ozone water are put into the stirring axe (1) through the feed inlet (5). After the raw materials are put in, the feed control valve (7) is closed so that the stirring axe (1) forms an initial closed cavity structure to prepare for subsequent sterilization operations. S2. Start the high-temperature and high-pressure steam generator (3) and steam control valve (15), and at the same time open the exhaust control valve (8) of the exhaust port. High-temperature and high-pressure steam is continuously introduced into the agitator (1) to preheat the raw materials. When the temperature inside the agitator (1) reaches 100°C, close the exhaust control valve (8) and seal the exhaust channel of the agitator (1). S3. High-temperature and high-pressure steam is continuously introduced into the stirring axe (1) through the high-temperature and high-pressure steam generator (3) to stabilize the temperature of the raw material inside the stirring axe (1) at 121℃ and keep it at a constant temperature for 60-90 minutes for sterilization. During the entire constant temperature sterilization process, the stirring component (17) is continuously rotated and stirred to carry out the sterilization operation. S4. After the sterilization operation is completed, turn off the high temperature and high pressure steam generator (3) and at the same time close the one-way valve (15) of the high temperature and high pressure gas inlet (14) to cut off the steam input; start the cooling circulation device (2) to continuously circulate and deliver cooling air to the cooling chamber (11) through the cooling medium inlet (13) and cooling medium outlet (12) to cool the raw materials inside the stirring axe (1) in a sealed manner; when the temperature inside the stirring axe (1) is stably reduced to the range of 22–25℃, turn off the cooling circulation device (2) and stop the circulation cooling operation; S5. After cooling is completed, open the gas replenishment control valve (22) so that the sterile ozone mixture gas in the piston chamber (42) after multi-stage filtration and ozone sterilization is smoothly introduced into the stirring axe (1) through the pipe C to compensate for the air pressure difference formed after the internal cooling of the stirring axe (1) and maintain the air pressure balance of the chamber; the stirring component (17) continues to maintain the stirring working state throughout the pressure replenishment process; then open the discharge control valve (10) of the discharge port (9) to smoothly discharge the sterilized edible fungus culture medium raw material, and complete the whole set of raw material preparation process.

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