Fermentation workshop disc fan

Abstract

The utility model relates to the technical field of food processing, in particular to a disc fan for a fermentation workshop, which comprises the fermentation workshop, an air guide pipe and a disc fan, and the air guide pipe is arranged on the outer wall of the fermentation workshop; the disc fan is arranged on the air guide pipe and comprises a circular shell, an impeller arranged in the circular shell and a motor which is arranged outside the circular shell and is in transmission connection with the impeller. According to the utility model, directional flow of air in the fermentation workshop is realized, proper oxygen content and temperature and humidity environment in the workshop are maintained, and the fermentation process is ensured to be stably carried out; the motor is arranged outside the circular shell, so that the motor is separated from an environment with poor working conditions in the air guide pipe to operate, daily spot inspection, operation and maintenance of maintainers are facilitated, and the problem that an operator in a fermentation workshop cannot visually see operation of equipment in the past is solved; the maintenance can be carried out only when the disc fan has serious abnormal sound or equipment parts fall off and are stuck by blades, so that the service life of the disc fan is prolonged, and the working efficiency of a fermentation workshop is improved.

Description

Technical Field

[0001] This utility model relates to the field of food processing technology, specifically to a disc fan for fermentation workshops. Background Technology

[0002] In the industrial fields of bio-fermentation or food brewing, fermentation workshops are the core places for realizing microbial cultivation and product transformation. The stability of their internal environmental parameters directly affects fermentation efficiency, product quality, and equipment operation safety. The method to regulate the internal environment of fermentation workshops is to promptly remove the hot and humid gases and volatile metabolites generated during fermentation through ventilation systems, so as to avoid excessively high local concentrations that inhibit microbial activity.

[0003] Currently, the commonly used ventilation systems in fermentation workshops mainly include axial flow fans, centrifugal fans, and duct ventilation systems. However, axial flow fans usually need to be fixed to the wall or roof with pre-reserved holes, which limits the installation location and can damage the structural integrity of the fermentation workshop. While centrifugal fans distribute airflow through ducts, the duct layout needs to match the workshop layout. For fermentation workshops with dense equipment and complex pipelines, the pipeline laying is difficult, and impurities can easily accumulate in the dead corners of the pipelines during later cleaning and maintenance, increasing the risk of cross-contamination.

[0004] Therefore, it is urgent to propose a new wind turbine structure to solve the above problems. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a disc fan for fermentation workshops, which achieves directional airflow within the workshop, maintains suitable oxygen content and temperature / humidity, and ensures the stable progress of the fermentation process. Furthermore, by placing the motor outside the circular casing, the motor operates outside the poor working conditions inside the air duct, facilitating routine inspections and maintenance by maintenance personnel. This avoids the previous situation where operators in fermentation workshops could not directly observe equipment operation and only performed maintenance when the disc fan exhibited severe abnormal noise or when parts fell off and jammed. This improves the lifespan of the disc fan and increases the working efficiency of the fermentation workshop.

[0006] In view of the above, the fermentation workshop disc fan of this utility model includes:

[0007] Fermentation workshop; and

[0008] The air duct is installed on the outer wall of the fermentation workshop;

[0009] A disc fan, mounted on the air duct, includes a circular housing, an impeller inside the circular housing, and a motor mounted outside the circular housing and driven by the impeller.

[0010] The disc blower for fermentation workshops according to embodiments of this utility model has at least the following technical effects:

[0011] When the disc fan is running, the motor drives the impeller to rotate at high speed, creating a negative pressure zone inside the circular casing. Air from the fermentation workshop flows through the duct inlet into the circular casing under the pressure difference, gaining kinetic and static pressure energy under the action of the impeller, and is ultimately transported outside the fermentation workshop. The entire ventilation process achieves directional airflow within the fermentation workshop, maintaining a suitable oxygen content and temperature / humidity environment, ensuring the stable progress of the fermentation process. Furthermore, by placing the motor outside the circular casing, the motor operates outside the harsh environment inside the duct, facilitating routine inspections and maintenance by maintenance personnel. This avoids the previous situation where operators could not directly observe equipment operation and only performed maintenance when the disc fan made severe abnormal noises or when parts fell off and jammed. This extends the lifespan of the disc fan and improves the working efficiency of the fermentation workshop.

[0012] According to some embodiments of the present invention, a filter assembly is provided at the connection between the air duct and the fermentation workshop. The filter assembly includes a primary filter and a high-efficiency filter arranged sequentially along the airflow direction. The pore size of the primary filter is 50μm-100μm, and the pore size of the high-efficiency filter is 0.3μm-1μm.

[0013] According to some embodiments of the present invention, the inner wall of the circular shell is provided with an annular protrusion, the annular protrusion is arranged along the circumference of the circular shell, and a gap of 0.5mm-1mm is left between the edge of the impeller and the annular protrusion.

[0014] According to some embodiments of the present invention, the motor is fixed to the outer wall of the circular housing by a mounting base, and a transmission assembly is provided between the output shaft of the motor and the impeller; the transmission assembly includes a pulley one mounted on the output shaft of the motor, a pulley two mounted on the impeller shaft of the impeller, and a synchronous belt that drivesly connects pulley one and pulley two.

[0015] According to some embodiments of the present invention, the transmission assembly is provided with a housing, and the output shaft and impeller shaft of the motor are inserted into the housing and connected to the transmission assembly.

[0016] According to some embodiments of the present invention, the impeller adopts backward-curved blades, the number of blades is 6-10, the thickness of the blades gradually decreases radially from the root to the edge, the thickness at the root is 5mm-8mm, and the thickness at the edge is 2mm-3mm.

[0017] According to some embodiments of the present invention, a motor bracket is provided on the outer side of the circular shell. The motor bracket includes an annular base and several radially extending support arms. The annular base is fixedly connected to the outer wall of the circular shell, and the free end of the support arm is fixedly connected to the motor.

[0018] According to some embodiments of the present invention, an air volume regulating device is provided at the air inlet of the circular shell. The regulating device includes a plurality of arc-shaped baffles evenly distributed along the circumference and a synchronous drive mechanism. The arc-shaped baffles are hinged to the circular shell through a rotating shaft. The synchronous drive mechanism includes an annular rack and a gear fixedly connected to the rotating shaft of the arc-shaped baffle. The annular rack meshes with the gear and is connected to a drive motor.

[0019] According to some embodiments of the present invention, the air duct is provided with an airflow rectification component, the airflow rectification component includes a plurality of guide rings spaced apart along the airflow direction, the inner diameter of the guide rings is distributed in a gradually decreasing step shape from the air inlet to the air outlet, and the distance between two adjacent guide rings is 50mm-100mm.

[0020] According to some embodiments of the present invention, the fermentation workshop is provided with an air distribution duct connected to the air guide duct. The air distribution duct extends horizontally along the top of the fermentation workshop and is provided with several downward air inlets. The air inlets are provided with louver structures with adjustable angles.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the disc fan structure of this utility model;

[0025] Explanation of icon numbers:

[0026] 100. Fermentation workshop; 200. Air duct; 300. Disc fan; 301. Circular shell; 302. Impeller; 303. Motor; 304. Outer shell.

[0027] The purpose, features, and advantages of this accompanying drawing will be further explained in conjunction with the embodiments and with reference to the accompanying drawing. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] See Figure 1 and Figure 2 As shown, the fermentation workshop disc fan of this utility model includes a fermentation workshop 100, an air duct 200, and a disc fan 300. Among them,

[0035] The air duct 200 is located on the outer wall of the fermentation workshop 100; the disc fan 300 is located on the air duct 200. The disc fan 300 includes a circular housing 301, an impeller 302 and a motor 303. The impeller 302 is located inside the circular housing 301, and the motor 303 is located outside the circular housing 301. The motor 303 is connected to the impeller 302 in a transmission connection.

[0036] In this embodiment, the fermentation process in the product production process is completed in the fermentation workshop 100. The fermentation workshop 100 has a cuboid or cylindrical structure, and the fermentation equipment is placed inside the fermentation workshop 100. A duct 200 is connected to the upper part of the outer wall of the fermentation workshop 100, and the end of the duct 200 away from the fermentation workshop 100 is connected to the outside or to the exhaust gas treatment workshop. A disc fan 300 is installed in the middle of the duct 200 and near the top of the fermentation workshop 100 to facilitate maintenance or operation of the disc fan 300 from the top of the fermentation workshop 100. The disc fan 300 includes a circular housing 301, an impeller 302, and a fan; the shape and size of the circular housing 301 are adapted to the cross-section of the duct 200, and the bolt mounting holes at both ends of the circular housing 301 are connected to the bolt mounting holes on the duct 200, so that the circular housing 301 is fixedly installed on the duct 200, forming a complete ventilation channel. A motor 303 is installed outside the circular housing 301, and an impeller 302 is placed inside the circular housing 301 and arranged coaxially with the circular housing 301. The motor 303 is connected to the impeller 302 by transmission. The motor 303 drives the impeller 302 to rotate, thereby drawing the gas inside the fermentation workshop 100 to the outside of the fermentation workshop 100.

[0037] Specifically, the fermentation workshop 100 adopts a cuboid or cylindrical steel structure frame, with the outer wall covered by insulated color steel plates and the inner wall treated with anti-corrosion to withstand the erosion of acidic or alkaline gases generated during fermentation. Installation openings adapted to the air duct 200 are pre-reserved in the walls of the fermentation workshop 100, and the edges of the installation openings are welded with annular reinforcing ribs to enhance the structural strength of the connection with the air duct 200.

[0038] Furthermore, the air duct 200 is made of stainless steel. Its diameter is designed according to the volume and ventilation requirements of the fermentation workshop 100, typically ranging from 300mm to 800mm, and its wall thickness is 3mm to 5mm. The connection between the air duct 200 and the outer wall of the fermentation workshop 100 uses a flange sealing structure, with a heat-resistant rubber gasket installed between the two flanges to prevent gas leakage. Depending on process requirements, the end of the air duct 200 furthest from the fermentation workshop 100 is connected to the outdoors or the exhaust gas treatment workshop. When connected to the outdoors, a rain cap and insect screen are installed at the end of the air duct 200. When connected to the exhaust gas treatment workshop, it is connected to the air inlet of the exhaust gas treatment equipment via an expansion joint to compensate for installation errors and displacement caused by thermal expansion and contraction. The air duct 200 is L-shaped. A load-bearing bracket is installed on the air duct 200 every 3m-5m. The load-bearing bracket is fixed to the fermentation workshop 100, the wall, the hanging beam or other support structure by expansion bolts to ensure that the air duct 200 does not sag significantly during operation.

[0039] Furthermore, the disc fan 300 is installed near the top of the fermentation workshop 100, which shortens the distance between the disc fan 300 and the fermentation workshop 100 to reduce air pressure loss, and also facilitates daily inspection and maintenance by operators on the top platform of the fermentation workshop 100. The circular shell 301 is made of gray cast iron and undergoes treatment to eliminate internal stress. The flange faces at both ends of the circular shell 301 precisely match the flange faces of the air duct 200. 12-16 bolt mounting holes are evenly distributed on the flange faces, and high-strength bolts achieve a rigid connection between the circular shell 301 and the air duct 200. An elastic sealing ring is installed at the connection point. The elastic sealing ring is made of food-grade silicone and has a trapezoidal cross-sectional area, specifically with an upper base width of 10mm, a lower base width of 20mm, and a hypotenuse angle of 20°. Under the pre-tightening force of the bolts, it undergoes uniform deformation, ensuring sealing performance while absorbing vibration. The impeller 302 inside the circular housing 301 is made of 6061-T6 aluminum alloy, CNC machined and dynamically balanced to achieve a balance accuracy of G6.3. The impeller 302 is coaxially arranged with the circular housing 301. The motor 303 is an explosion-proof three-phase asynchronous motor with an IP55 protection rating, suitable for the dusty environment that may exist in the fermentation workshop. The motor 303 is fixed to the outer wall of the circular housing 301 via a motor 303 bracket. The motor 303 bracket is welded from Q235 steel and hot-dip galvanized for rust prevention. Its base is secured to the outer wall of the circular housing 301 with four M12 bolts. The four radially extending support arms are bolted to the cooling fins of the motor 303. The output shaft of the motor 303 is connected to the impeller 302 via a transmission. The transmission ratio is precisely matched to the required speed of the impeller 302 according to the speed of the motor 303, ensuring that the operating speed of the impeller 302 is stable between 1450 r / min and 2900 r / min.

[0040] When the disc fan 300 is running, the motor 303 drives the impeller 302 to rotate at high speed, creating a negative pressure zone inside the circular casing 301. Air inside the fermentation workshop 100 flows through the inlet of the duct 200 into the circular casing 301 under the influence of this pressure difference. Under the action of the impeller 302, it gains kinetic and static pressure energy and is ultimately transported outdoors or to the exhaust gas treatment workshop. The entire ventilation process achieves directional airflow within the fermentation workshop 100, both removing waste gas generated during fermentation and replenishing fresh air, maintaining a suitable oxygen content and temperature / humidity environment within the workshop, and ensuring the stable progress of the fermentation process. Furthermore, by placing the motor 303 outside the circular housing 301, the motor 303 is separated from the poor working conditions inside the air duct 200, which facilitates daily inspection and maintenance by maintenance personnel. This avoids the situation in the past where operators of the fermentation workshop 100 could not directly see the equipment operation and only carried out maintenance when the disc fan 300 made serious abnormal noises or when equipment parts fell off and the blades jammed. This improves the lifespan of the disc fan 300 and the working efficiency of the fermentation workshop 100.

[0041] Furthermore, the operation of the disc fan 300 can be automatically managed through the intelligent control system within the fermentation workshop 100. Based on real-time monitoring data from temperature and humidity sensors installed within the fermentation workshop 100, the intelligent control system automatically adjusts the speed of the motor 303: when the temperature inside the workshop exceeds a set threshold (e.g., 35℃) or the humidity exceeds 85%, the controller of the intelligent control system issues a command to increase the speed of the motor 303 to enhance ventilation; when the parameters return to normal, the motor 303 automatically reduces to its rated speed, achieving energy saving and consumption reduction.

[0042] In some specific embodiments of this utility model, a filter assembly is provided at the connection between the air duct 200 and the fermentation workshop 100. The filter assembly includes a primary filter and a high-efficiency filter arranged sequentially along the airflow direction. The pore size of the primary filter is 50μm-100μm, and the pore size of the high-efficiency filter is 0.3μm-1μm.

[0043] In this embodiment, the filter assembly adopts a drawer-type installation structure for easy and quick replacement and cleaning. The edges of the filter assembly are made of stainless steel and are fixed to the flange of the air duct 200 with bolts. Two parallel slots are provided inside the edge of the filter assembly for fixing the pre-filter and the high-efficiency filter, respectively. Along the airflow direction, the first slot houses the pre-filter, made of polyester fiber needle-punched felt, which is hot-pressed into a wavy structure to effectively increase the filtration area. The pore size of the pre-filter is controlled between 50μm and 100μm, effectively intercepting large particles of dust or fibrous impurities in the fermentation workshop 100. The second slot houses the high-efficiency filter, made of ultra-fine glass fiber filter paper, which is folded to form a dense pleated structure. The pore size of the high-efficiency filter is accurate to 0.3μm-1μm, effectively capturing tiny particles, microbial spores, and aerosols not filtered by the pre-filter. Both the pre-filter and the high-efficiency filter are wrapped with EPDM rubber sealing rings, tightly fitting the edge slots of the filter assembly to ensure that all airflow passes through the filter layer and avoids short circuits. The installation of the filter assembly effectively protects the disc blower 300, preventing impurities or dust from colliding with the impeller 302 and causing wear. Simultaneously, the fine particles adhering to the impeller 302 surface affect its dynamic balance, thus extending the service life of the disc blower 300. Furthermore, it intercepts microbial spores and organic aerosols generated during fermentation, preventing direct outdoor emissions and environmental pollution. Depending on the actual working environment, this can reduce the cost of exhaust gas treatment equipment. Additionally, when the disc blower 300 is shut down, the filter assembly prevents outdoor dust from entering the fermentation workshop 100 through the duct 200, ensuring a clean fermentation environment in conjunction with the positive pressure control of the fermentation workshop 100.

[0044] In some specific embodiments of this utility model, the inner wall of the circular shell 301 is provided with an annular protrusion, the annular protrusion is arranged along the circumference of the circular shell 301, and a gap of 0.5mm-1mm is left between the edge of the impeller 302 and the annular protrusion.

[0045] In this embodiment, the inner wall of the circular housing 301 is provided with an annular protrusion, which is integrally cast with the circular housing 301. The annular protrusion physically blocks the airflow generated by the rotation of the impeller 302, preventing some airflow from being lost through the gap between the edge of the impeller 302 and the inner wall of the housing without effectively doing work through the impeller 302. This forces the airflow to flow along the axial direction of the impeller 302, improving the fan's air pressure and air volume efficiency. Tests have shown that this increases the fan efficiency by 5%-8%. Specifically, the annular protrusion is continuously arranged along the circumference of the circular housing 301, with a right-angled trapezoidal cross-section. One side facing the rotation direction of the impeller 302 is a straight surface perpendicular to the inner wall of the housing, and the other side is an inclined surface at a 45° angle to the inner wall of the housing. The height of the annular protrusion is 10mm-15mm, and the width of the top of the annular protrusion is 8mm-12mm. A gap of 0.5mm-1mm is maintained between the edge of the impeller 302 and the annular protrusion. This small gap between the annular protrusion and the edge of the impeller 302 prevents friction between the impeller 302 and the inner wall of the circular shell during operation, and also creates an air-pressure bearing effect. This generates a stable radial constraint force when the impeller 302 rotates at high speed, reducing radial displacement caused by vibration and lowering the risk of collision between the impeller 302 and the circular shell 301. Especially in the fluctuating airflow environment of the fermentation workshop 100, this significantly improves the operational stability of the disc fan 300. Furthermore, the sloping design of the annular protrusion guides the airflow through a smooth transition, reducing eddy currents on the inner wall of the circular shell 301, lowering local resistance losses, and creating a more uniform velocity distribution before the airflow enters the duct 200, thus improving the stability of subsequent airflow delivery.

[0046] In some specific embodiments of this utility model, the motor 303 is fixed to the outer wall of the circular housing 301 by a mounting base, and a transmission assembly is provided between the output shaft of the motor 303 and the impeller 302; the transmission assembly includes a pulley one mounted on the output shaft of the motor 303, a pulley two mounted on the impeller 302 shaft, and a synchronous belt that drives the pulley one and the pulley two together.

[0047] In this embodiment, the power of the motor 303 is stably transmitted to the impeller 302 through the transmission of pulleys and a synchronous belt. This transmission assembly features a precise transmission ratio and smooth operation, with a transmission efficiency of over 98%, ensuring that the impeller 302 receives sufficient driving force. Simultaneously, the synchronous belt has a certain degree of elasticity, which can absorb the minor vibrations generated during the operation of the motor 303, reducing the transmission of vibration to the impeller 302 and preventing additional wear and noise caused by vibration. When maintenance of the motor 303 or impeller 302 is required, simply loosening the synchronous belt separates the motor 303 from the impeller 302 without disassembling the entire circular housing 301, reducing maintenance difficulty and time costs.

[0048] In some specific embodiments of this utility model, the transmission assembly is provided with a housing 304, and the output shaft of the motor 303 and the shaft of the impeller 302 are inserted into the housing 304 and connected to the transmission assembly.

[0049] In this embodiment, a housing 304 is provided outside the transmission component. The housing 304 is made of stainless steel sheet by stamping, and its thickness is 1.5mm-2mm. It has good corrosion resistance and structural strength, and can adapt to the humid and dusty environment of the fermentation workshop 100. The housing 304 has a rectangular structure and is customized according to the layout and size of the transmission component. The transmission component is fixed inside the housing 304. Both ends of the housing 304 are fixedly connected to the mounting base of the motor 303 and the outer wall of the circular housing 301 by bolts, respectively. Rubber sealing gaskets are installed at the connection to ensure the airtightness of the housing 304. Shaft holes are opened on the housing 304 corresponding to the output shaft of the motor 303 and the shaft of the impeller 302. Rubber sealing rings are installed in the shaft holes. The output shaft of the motor 303 and the shaft of the impeller 302 pass through the sealing rings and are inserted into the housing 304 to connect with the transmission component. This ensures the normal rotation of the shafts and prevents dust or moisture from entering the housing 304, thus extending the service life of the transmission component. Furthermore, the housing 304 can block and absorb the noise generated during the operation of the transmission components. Combined with the 10mm-15mm thick sound-absorbing cotton (such as polyester fiber sound-absorbing cotton) pasted on the inner wall of the housing 304, the noise can be reduced by 10dB-15dB, improving the working environment of the workshop. At the same time, the housing 304 forms a relatively enclosed space, reducing the impact of airflow disturbance on the synchronous belt drive and ensuring the smoothness of the transmission.

[0050] In some specific embodiments of this utility model, the impeller 302 adopts backward-curved blades, with 6 to 10 blades. The thickness of the blades gradually decreases radially from the root to the edge, with a thickness of 5mm-8mm at the root and 2mm-3mm at the edge.

[0051] In this embodiment, the impeller 302 adopts backward-curved blades. Depending on actual needs, the number of blades is 6-10 to ensure the uniformity of the airflow channel. Simultaneously, the airflow channel formed between the backward-curved blades is wider, and the blade surface is smooth, making it less prone to accumulating dust and impurities from the air in the fermentation workshop 100, reducing airflow reduction due to blockage. The blade thickness gradually decreases radially from the root to the edge, with a thickness of 5mm-8mm at the root and 2mm-3mm at the edge, effectively preventing root breakage. The blade surface is anodized to form an oxide film with a thickness of 10μm-15μm, improving wear resistance and corrosion resistance.

[0052] In some specific embodiments of this utility model, a motor 303 bracket is provided on the outer side of the circular housing 301. The motor 303 bracket includes an annular base and several radially extending support arms. The annular base is fixedly connected to the outer wall of the circular housing 301, and the free end of the support arm is fixedly connected to the motor 303.

[0053] In this embodiment, the weight of the motor 303 is evenly transferred to the circular housing 301 through the large-area contact between the annular base and the circular housing 301, avoiding excessive local stress that could cause deformation of the circular housing 301. The support arm can disperse the radial and axial forces generated by the motor 303 during operation.

[0054] In some specific embodiments of this utility model, an air volume regulating device is provided at the air inlet of the circular housing 301. The regulating device includes a plurality of arc-shaped baffles evenly distributed along the circumference and a synchronous drive mechanism. The arc-shaped baffles are hinged to the circular housing 301 through a rotating shaft. The synchronous drive mechanism includes an annular rack and a gear fixedly connected to the rotating shaft of the arc-shaped baffle. The annular rack meshes with the gear and is connected to a drive motor 303.

[0055] In this embodiment, the drive motor 303 drives the ring rack to rotate, causing all the arc-shaped baffles to rotate synchronously around the axis, changing the angle between the baffles and the air inlet axis. When the baffles are fully open (parallel to the axis), the air volume is maximum; when they are fully closed (perpendicular to the axis), the air volume is zero. The angle is continuously adjustable between 0° and 90° to meet the different ventilation requirements of different process stages (such as the early, middle, and late stages of fermentation) in the fermentation workshop 100. The synchronous adjustment of the arc-shaped baffles can make the airflow distribution at the air inlet uniform, avoid local airflow disturbances, ensure the stability of the work done by the impeller 302 of the disc fan 300, and thus maintain the stability of the air pressure in the fermentation workshop 100.

[0056] In some specific embodiments of this utility model, the air duct 200 is provided with an airflow rectification component. The airflow rectification component includes a number of guide rings spaced apart along the airflow direction. The inner diameter of the guide rings is distributed in a gradually decreasing step shape from the air inlet to the air outlet. The distance between two adjacent guide rings is 50mm-100mm.

[0057] In this embodiment, the air discharged from the fermentation workshop 100 is prone to eddies and turbulence after entering the air duct 200 due to pipe bends, cross-sectional changes, etc. The guide ring constrains and guides the airflow through its annular structure, organizing the turbulent airflow into an axially uniform flow, making the airflow velocity distribution more uniform. The gradually narrowing stepped distribution of the guide ring enables the airflow to accelerate smoothly within the air duct 200, avoiding local resistance caused by sudden changes in flow velocity.

[0058] In some specific embodiments of this utility model, the fermentation workshop 100 is provided with an air distribution duct that is connected to the air guide duct 200. The air distribution duct extends laterally along the top of the fermentation workshop 100 and is provided with several downward air inlets. The air inlets are provided with louver structures with adjustable angles.

[0059] In this embodiment, air within the fermentation workshop 100 is evenly distributed into the air duct 200 via a distribution duct. Ventilation of a portion of the fermentation workshop 100 is selectively achieved through a louvered structure.

[0060] The above content is merely a modification or supplement to the structure of this utility model or a substitution in a similar manner. As long as it does not deviate from the structure of the utility model or exceed the scope defined in the claims, it shall fall within the protection scope of this utility model.

Claims

1. A disc fan for a fermentation workshop, characterized in that, include: Fermentation workshop (100); and An air duct (200) is installed on the outer wall of the fermentation workshop (100); The disc fan (300) is mounted on the air duct (200) and includes a circular housing (301), an impeller (302) mounted inside the circular housing (301), and a motor (303) mounted outside the circular housing (301) and drivenly connected to the impeller (302).

2. The disc fan for the fermentation workshop according to claim 1, characterized in that, A filter assembly is provided at the connection between the air duct (200) and the fermentation workshop (100). The filter assembly includes a primary filter and a high-efficiency filter arranged sequentially along the airflow direction. The pore size of the primary filter is 50μm-100μm, and the pore size of the high-efficiency filter is 0.3μm-1μm.

3. The disc fan for the fermentation workshop according to claim 1, characterized in that, The inner wall of the circular shell (301) is provided with an annular protrusion, which is arranged along the circumference of the circular shell (301). A gap of 0.5mm-1mm is left between the edge of the impeller (302) and the annular protrusion.

4. The disc fan for the fermentation workshop according to claim 1, characterized in that, The motor (303) is fixed to the outer wall of the circular housing (301) by a mounting base. A transmission assembly is provided between the output shaft of the motor (303) and the impeller (302). The transmission assembly includes a pulley one mounted on the output shaft of the motor (303), a pulley two mounted on the impeller (302) shaft, and a synchronous belt that drives the pulley one and the pulley two together.

5. The disc fan for the fermentation workshop according to claim 4, characterized in that, The transmission assembly is provided with a housing (304) on the outside, and the output shaft of the motor (303) and the impeller (302) shaft are inserted into the housing (304) and connected to the transmission assembly.

6. The disc fan for the fermentation workshop according to claim 1, characterized in that, The impeller (302) adopts backward-curved blades, the number of blades is 6-10, the thickness of the blades gradually decreases radially from the root to the edge, the thickness at the root is 5mm-8mm, and the thickness at the edge is 2mm-3mm.

7. The disc fan for the fermentation workshop according to claim 1, characterized in that, The outer side of the circular housing (301) is provided with a motor (303) bracket. The motor (303) bracket includes an annular base and several radially extending support arms. The annular base is fixedly connected to the outer wall of the circular housing (301), and the free end of the support arm is fixedly connected to the motor (303).

8. The disc fan for the fermentation workshop according to claim 1, characterized in that, The circular housing (301) is provided with an air volume regulating device at the air inlet. The regulating device includes several arc-shaped baffles evenly distributed along the circumference and a synchronous drive mechanism. The arc-shaped baffles are hinged to the circular housing (301) through a rotating shaft. The synchronous drive mechanism includes an annular rack and a gear fixedly connected to the rotating shaft of the arc-shaped baffle. The annular rack meshes with the gear and is connected to a drive motor (303).

9. The disc fan for the fermentation workshop according to claim 1, characterized in that, The air duct (200) is provided with an airflow rectification component, which includes a number of guide rings spaced apart along the airflow direction. The inner diameter of the guide rings is distributed in a gradually decreasing step shape from the air inlet to the air outlet, and the distance between two adjacent guide rings is 50mm-100mm.

10. The disc blower for fermentation workshops according to any one of claims 1 to 9, characterized in that, The fermentation workshop (100) is equipped with an air distribution duct that is connected to the air guide duct (200). The air distribution duct extends horizontally along the top of the fermentation workshop (100) and has several downward air inlets. The air inlets are equipped with louver structures with adjustable angles.

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