A fermentation device for grain liquor production

Abstract

The utility model discloses a kind of fermentation devices for grain liquor production, it is related to grain liquor production technical field, including fermentation tank main body and gas outlet, the top of the gas outlet is fixedly connected with gas one-way valve, the top of the gas one-way valve is provided with exhaust collection mechanism, the bottom of the exhaust collection mechanism is provided with purification assembly, the exhaust collection mechanism includes connecting pipe and filter shell, one end of the connecting pipe is fixedly communicated with gas one-way valve, and the other end is fixedly communicated with filter shell;The inner chamber of the filter shell is provided with filter assembly.The utility model is used in cooperation with the setting gas one-way valve, exhaust collection mechanism and purification assembly, solve the existing stirring fermentation tank when using, for balancing tank pressure, prevent external air backflow and destroy fermentation environment, gas one-way valve will be installed in gas outlet, only allow tank exhaust gas to discharge, but the design can only realize pressure discharge, not to discharge exhaust gas to do collection or purification treatment, directly discharging gas can lead to operating area environmental risk, cause the problem of threat to human health.

Description

Technical Field

[0001] This utility model relates to the field of grain liquor production technology, specifically to a fermentation device for grain liquor production. Background Technology

[0002] In grain liquor production, the stirred fermentation tank is the core equipment. Its main function is to provide a suitable fermentation environment for grain raw materials and yeast microorganisms. By stirring, the raw materials, yeast and fermentation liquid are fully mixed, ensuring efficient metabolism of microorganisms, converting grain starch into alcohol and flavor substances, and laying the foundation for subsequent processes.

[0003] The problem with existing technology is that existing stirred fermenters install one-way valves at the exhaust port to balance the pressure inside the tank and prevent external air from backflowing and disrupting the fermentation environment. This allows only the exhaust gas inside the tank to be discharged. However, this design can only achieve pressure relief and does not collect or purify the exhaust gas. Directly discharging the gas will lead to environmental risks in the operating area and pose a threat to human health. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide a fermentation device for grain liquor production, which has the advantages of collecting and purifying waste gas. This solves the problem that in existing stirred fermentation tanks, in order to balance the pressure inside the tank and prevent external air backflow from disrupting the fermentation environment, a one-way valve is installed at the exhaust port to allow only the waste gas inside the tank to be discharged. However, this design only achieves pressure relief and does not collect or purify the discharged waste gas. Directly discharging the gas will lead to environmental risks in the operating area and pose a threat to human health.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fermentation device for grain liquor production, comprising a fermentation tank body and a gas outlet, wherein a one-way gas valve is fixedly connected to the top of the gas outlet, an exhaust gas collection mechanism is provided at the top of the one-way gas valve, and a purification component is provided at the bottom of the exhaust gas collection mechanism. The exhaust collection mechanism includes a connecting pipe and a filter housing. One end of the connecting pipe is fixedly connected to a gas check valve, and the other end is fixedly connected to the filter housing. The filter housing has a filter assembly inside its cavity and a guide assembly on its right side.

[0006] As a preferred embodiment of this utility model, the purification component includes a support frame and a water seal tank. The left side of the support frame is fixedly connected to the main body of the fermentation tank, and the side of the support frame away from the main body of the fermentation tank is fixedly connected to the water seal tank. The top of the water seal tank is fixedly connected to an exhaust port.

[0007] As a preferred embodiment of this invention, the bottom of the water seal tank is fixedly connected to a drain outlet, and the top of the outer surface of the water seal tank is fixedly connected to a water inlet.

[0008] As a preferred embodiment of this utility model, the filter assembly includes a filter plate, the surface of which is fixedly connected to the inner wall of the filter housing, a rotating plate is provided on the left side of the filter plate, a drive shaft is fixedly connected to the middle of the left side of the rotating plate, and brush bristles are fixedly connected to the top and bottom of the left side of the rotating plate. The right side of the drive shaft passes through the filter plate and extends to the right side of the filter plate, and the bristles on the side closest to the filter plate are in contact with the filter plate.

[0009] As a preferred embodiment of this utility model, a waste housing is fixedly connected to the left side of the bottom of the filter housing, a receiving box is provided in the inner cavity of the waste housing, and a pull rod is provided on the front side of the receiving box; The front side of the receiving box penetrates through the waste shell and extends to the outside of the waste shell, where it is fixedly connected to the pull rod.

[0010] As a preferred embodiment of the present invention, the guiding assembly includes a guiding housing and an exhaust pipe. The side of the guiding housing near the filter housing is fixedly connected to the filter housing. One end of the exhaust pipe is fixedly connected to the guiding housing, while the other end passes through the water seal tank and extends to the bottom of the inner cavity of the water seal tank.

[0011] As a preferred embodiment of this utility model, a fixing frame is fixedly connected to the inner cavity of the guide housing, a motor is fixedly connected to the inner side of the fixing frame, the output shaft of the motor passes through the filter housing and extends into the inner cavity of the filter housing, and an exhaust fan is fixedly connected thereto, with the left side of the exhaust fan fixedly connected to the drive shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model solves the problem of existing stirred fermenters, which, in order to balance the pressure inside the tank and prevent external air backflow from disrupting the fermentation environment, install a gas one-way valve at the outlet to allow only the exhaust gas inside the tank to be discharged. However, this design only achieves pressure relief and does not collect or purify the discharged exhaust gas. Directly discharging the gas will lead to environmental risks in the operating area and threaten human health. This utility model achieves the effect of collecting and purifying the discharged gas and avoiding environmental risks in the operating area.

[0013] 2. By incorporating a purification component, this utility model can purify the discharged gas, thus preventing pollution of the operating area.

[0014] 3. By setting up a filter component, this utility model can filter particulate impurities in the gas, which facilitates subsequent gas purification.

[0015] 4. By setting a guiding component, this utility model can guide the gas and accelerate its entry into the purification component, thereby improving the purification efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the purification component structure; Figure 3 This is a full sectional view of the filter housing; Figure 4 This is a schematic diagram of the guide component structure.

[0017] In the diagram: 1. Fermentation tank body; 2. Gas outlet; 3. Gas check valve; 4. Exhaust collection mechanism; 5. Purification component; 6. Waste shell; 7. Receiving box; 8. Tie rod; 9. Fixing frame; 10. Motor; 11. Exhaust fan; 41. Connecting pipe; 42. Filter shell; 43. Filter component; 44. Guide component; 51. Support frame; 52. Water seal tank; 53. Exhaust port; 54. Drain port; 55. Water inlet; 431. Filter plate; 432. Rotating plate; 433. Drive shaft; 434. Brush bristles; 441. Guide shell; 442. Exhaust pipe. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0022] Example 1 Reference Figure 1-4 This is the first embodiment of the present invention, which provides a fermentation device for grain liquor production, including a fermentation tank body 1 and a gas outlet 2. A gas one-way valve 3 is fixedly connected to the top of the gas outlet 2, an exhaust collection mechanism 4 is provided at the top of the gas one-way valve 3, and a purification component 5 is provided at the bottom of the exhaust collection mechanism 4. The exhaust collection mechanism 4 includes a connecting pipe 41 and a filter housing 42. One end of the connecting pipe 41 is fixedly connected to the gas check valve 3, and the other end is fixedly connected to the filter housing 42. The filter housing 42 has a filter assembly 43 inside its cavity and a guide assembly 44 on its right side.

[0023] Specifically, by setting up purification component 5, the exhaust gas can be purified to avoid contamination of the operating area; By setting the filter component 43, particulate impurities in the gas can be filtered, which facilitates subsequent gas purification. By setting the guiding component 44, the gas can be guided and accelerated to enter the purification component 5, thereby improving the purification efficiency. By setting up a connecting pipe 41 and a filter housing 42, the connecting pipe 41 can guide the gas discharged from the gas check valve 3 to the filter housing 42, and the filter housing 42 can contain and process the discharged gas.

[0024] Furthermore, the waste gas generated during fermentation inside the fermentation tank 1 is introduced into the gas check valve 3 through the gas outlet 2 under the pressure inside the tank. The gas check valve 3 can prevent external air from backflowing into the fermentation tank, ensuring a stable fermentation environment. Subsequently, it is directed to the inside of the filter housing 42 through the connecting pipe 41. The waste gas entering the filter housing 42 first comes into contact with the filter component 43 to complete the filtration of particulate impurities, and then enters the purification component 5 under the action of the guide component 44, realizing a continuous treatment process of collection, filtration and guidance.

[0025] Example 2 In the second embodiment of this utility model, the purification component 5 includes a support frame 51 and a water seal tank 52. The left side of the support frame 51 is fixedly connected to the fermentation tank body 1, and the side of the support frame 51 away from the fermentation tank body 1 is fixedly connected to the water seal tank 52. The top of the water seal tank 52 is fixedly connected to an exhaust port 53.

[0026] The bottom of the water seal tank 52 is fixedly connected to a drain outlet 54, and the top of the outer surface of the water seal tank 52 is fixedly connected to a water inlet 55.

[0027] Specifically, by setting up a support frame 51 and a water seal tank 52, the support frame 51 can stably fix the water seal tank 52 to the side of the fermentation tank body 1, preventing the water seal tank 52 from shifting due to its own weight or the impact of exhaust gas, thus ensuring the overall stability of the purification component 5, while the water inside the water seal tank 52 can purify the gas. By setting up an inlet 55, purified water is injected into the water seal tank 52, and a small amount of neutralizing agent can be added according to the composition of the waste gas. By setting up a drain outlet 54, the wastewater in the water seal tank 52 is replaced regularly to prevent the water from becoming saturated with harmful substances and affecting the purification effect. By setting an exhaust port 53, the exhaust port 53 at the top is used to discharge gases that have been purified by water and meet the standards, thereby achieving the harmless discharge of waste gas.

[0028] Furthermore, before use, inject an appropriate amount of water into the water seal tank 52 through the inlet 55 to ensure that the lower end of the exhaust pipe 442 is submerged in water. When the exhaust gas enters the water seal tank 52 from the exhaust pipe 442, it needs to pass through the water to be discharged upward. During this process, soluble harmful gases in the exhaust gas, such as alcohol vapor and organic acid vapor, will dissolve in the water. If there are any residual particulate impurities, they will be intercepted and settled by the water. The purified gas will be discharged from the exhaust port 53 at the top of the water seal tank 52. After a period of use, the wastewater can be discharged through the drain port 54 and new water can be refilled to ensure that the purification effect is continuous and stable.

[0029] Example 3 In the third embodiment of this utility model, the filter assembly 43 includes a filter plate 431. The surface of the filter plate 431 is fixedly connected to the inner wall of the filter housing 42. A rotating plate 432 is provided on the left side of the filter plate 431. A drive shaft 433 is fixedly connected to the middle of the left side of the rotating plate 432. Brush bristles 434 are fixedly connected to the top and bottom of the left side of the rotating plate 432. The right side of the drive shaft 433 passes through the filter plate 431 and extends to the right side of the filter plate 431, and the bristles 434 are in contact with the filter plate 431 on the side closest to the filter plate 431.

[0030] The bottom left side of the filter housing 42 is fixedly connected to the waste housing 6. The inner cavity of the waste housing 6 is provided with a receiving box 7, and a pull rod 8 is provided on the front side of the receiving box 7. The front side of the receiving box 7 penetrates through the waste shell 6 and extends to the outside of the waste shell 6, where it is fixedly connected to the pull rod 8.

[0031] Specifically, by setting up a filter plate 431, a rotating plate 432, a drive shaft 433, and brush bristles 434, the filter plate 431 can effectively intercept impurities such as grain particles and fermentation residues in the exhaust gas, preventing impurities from entering the exhaust pipe 442 with the exhaust gas and causing blockage. The rotating plate 432 rotates synchronously with the drive shaft 433, driving the brush bristles 434 to wipe along the left side surface of the filter plate 431, which can clean the impurities attached to the pores of the filter plate 431 in time, avoid the filter plate 431 from being blocked, which would increase the resistance to the flow of exhaust gas and ensure stable exhaust gas treatment efficiency. The drive shaft 433 can drive the rotating plate 432 to rotate. By setting up a waste housing 6, a receiving box 7, and a pull rod 8, the waste housing 6 is connected to the bottom of the filter housing 42, forming an impurity collection channel. The impurities cleaned by the brush bristles 434 fall into the receiving box 7 under the action of gravity, preventing impurities from accumulating at the bottom of the filter housing 42. The receiving box 7 adopts a pull-out structure, and the receiving box 7 can be easily pulled out from the waste housing 6 by the pull rod 8, which is convenient for regular cleaning of impurities. Moreover, the cleaning process does not require disassembly of the device, reducing maintenance workload.

[0032] Furthermore, when the exhaust gas enters the filter housing 42, it first flows to the filter plate 431. The particulate impurities in the exhaust gas are intercepted on the left surface by the filter plate 431. The filtered exhaust gas then flows through the pores of the filter plate 431 to the guide assembly 44 on the right. At the same time, the drive shaft 433 drives the rotating plate 432 to rotate under the drive of the motor 10 in the guide assembly 44. The bristles 434 on both sides of the rotating plate 432 then move in a circular motion along the left surface of the filter plate 431, sweeping off the impurities attached to the surface of the filter plate 431. Under the action of gravity, the swept impurities fall into the receiving box 7 through the connection between the filter housing 42 and the waste housing 6. After the device has been running for a period of time, the operator can pull the lever 8 to pull the receiving box 7 out of the waste housing 6, empty the internal impurities, and push it back in to complete the impurity cleaning and ensure that the filter assembly 43 continues to work normally.

[0033] Example 4 In the fourth embodiment of this utility model, the guide assembly 44 includes a guide housing 441 and an exhaust pipe 442. The guide housing 441 is fixedly connected to the filter housing 42 on the side near the filter housing 42. One end of the exhaust pipe 442 is fixedly connected to the guide housing 441, while the other end passes through the water seal tank 52 and extends to the bottom of the inner cavity of the water seal tank 52.

[0034] A fixing frame 9 is fixedly connected to the inner cavity of the guide housing 441. A motor 10 is fixedly connected to the inner side of the fixing frame 9. The output shaft of the motor 10 passes through the filter housing 42 and extends into the inner cavity of the filter housing 42. An exhaust fan 11 is fixedly connected thereto. The left side of the exhaust fan 11 is fixedly connected to the drive shaft 433.

[0035] Specifically, by setting up a guide housing 441 and an exhaust pipe 442, the guide housing 441 is sealed and connected to the right side of the filter housing 42 to form a waste gas transition chamber, which can prevent the waste gas from directly diffusing after filtration. The exhaust pipe 442 is made of corrosion-resistant plastic material, one end of which is connected to the guide housing 441, and the other end extends to the bottom of the inner cavity of the water seal tank 52 and is close to the bottom of the tank. It can guide the filtered waste gas into the water in the water seal tank 52 in a directional manner, ensuring that the waste gas and the water are in full contact and improving the purification effect. By setting up a fixed frame 9, a motor 10, and an exhaust fan 11, the fixed frame 9 can support the motor 10. The motor 10 is a low-speed asynchronous motor, and its output shaft is connected to both the exhaust fan 11 and the drive shaft 433. On the one hand, when the exhaust fan 11 rotates, it generates negative pressure on the right side of the filter housing 42, which accelerates the flow of exhaust gas in the filter housing 42 to the guide housing 441. On the other hand, the drive shaft 433 rotates with the output shaft of the motor 10, driving the brush bristles 434 to clean the filter plate 431.

[0036] Furthermore, when the device is started, the motor 10 starts to run, and its output shaft drives the exhaust fan 11 and the drive shaft 433 to rotate synchronously. The exhaust fan 11 generates negative pressure on the right side of the filter housing 42, causing the filtered exhaust gas in the filter housing 42 to flow quickly to the guide housing 441. The exhaust gas entering the guide housing 441 is continuously pushed by the exhaust fan 11 and transported to the bottom of the inner cavity of the water seal tank 52 through the exhaust pipe 442, where it diffuses in the water. At the same time, the drive shaft 433 drives the rotating plate 432 and the brush bristles 434 to rotate, cleaning the filter plate 431 in real time.

[0037] Working principle: During operation, the fermentation of grain in the main body 1 of the fermentation tank produces waste gas. The pressure inside the tank increases, causing the waste gas to enter the gas check valve 3 through the top gas outlet 2. The gas check valve 3 prevents external air from flowing back in, ensuring a stable fermentation environment. The waste gas enters the filter housing 42 through the connecting pipe 41. The exhaust gas entering the filter housing 42 first contacts the filter plate 431, and the particulate impurities are intercepted on the left side of the filter plate 431. At the same time, the motor 10 drives the transmission shaft 433 to rotate, which drives the rotating plate 432 and the brush bristles 434 to wipe the surface of the filter plate 431. The cleaned impurities fall into the receiving box 7 of the waste housing 6. The impurities in the receiving box 7 can be cleaned by periodically pulling the pull rod 8. The motor 10 synchronously drives the exhaust fan 11 to rotate, generating negative pressure on the right side of the filter housing 42, which accelerates the filtered exhaust gas into the guide housing 441. The exhaust gas in the guide housing 441 is pushed by the exhaust fan 11 and transported through the exhaust pipe 442 to the water at the bottom of the inner cavity of the water seal tank 52. When the exhaust gas passes through the water in the water seal tank 52, the alcohol vapor and organic acid vapor dissolve in the water, and the residual tiny impurities are intercepted by the water. The purified clean gas is discharged from the exhaust port 53 at the top of the water seal tank 52. Water is replenished or a neutralizing agent is added periodically through the water inlet 55, and saturated wastewater is discharged through the drain port 54 to ensure the purification effect.

[0038] In summary, by using the gas one-way valve 3, the exhaust collection mechanism 4, and the purification component 5 in combination, the exhaust gas can be collected and purified, thus avoiding environmental risks in the operating area.

[0039] The technical means of this application employ protective measures that are of common knowledge in the field and can be additionally installed on the motor under different operating environments. These measures include, but are not limited to, the following: protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing. These are common technical means used by those skilled in the art.

[0040] It should be noted that the motor 10 is a device or equipment existing in the prior art, or a device or equipment that can be implemented by the prior art. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the device, as well as the materials of each accessory and the selection of various parameters are all common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0041] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0042] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0043] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fermentation device for grain liquor production, comprising a fermentation tank body (1) and a gas outlet (2), wherein a one-way gas valve (3) is fixedly connected to the top of the gas outlet (2), characterized in that: The top of the gas check valve (3) is provided with an exhaust collection mechanism (4), and the bottom of the exhaust collection mechanism (4) is provided with a purification component (5). The exhaust collection mechanism (4) includes a connecting pipe (41) and a filter housing (42). One end of the connecting pipe (41) is fixedly connected to the gas check valve (3), and the other end is fixedly connected to the filter housing (42). The filter housing (42) has a filter assembly (43) inside its cavity and a guide assembly (44) on its right side.

2. The fermentation apparatus for grain liquor production according to claim 1, characterized in that: The purification component (5) includes a support frame (51) and a water seal tank (52). The left side of the support frame (51) is fixedly connected to the fermentation tank body (1), and the side of the support frame (51) away from the fermentation tank body (1) is fixedly connected to the water seal tank (52). The top of the water seal tank (52) is fixedly connected to an exhaust port (53).

3. The fermentation apparatus for grain liquor production according to claim 2, characterized in that: The bottom of the water seal tank (52) is fixedly connected to a drain outlet (54), and the top of the outer surface of the water seal tank (52) is fixedly connected to a water inlet (55).

4. The fermentation apparatus for grain liquor production according to claim 1, characterized in that: The filter assembly (43) includes a filter plate (431), the surface of which is fixedly connected to the inner wall of the filter housing (42), a rotating plate (432) is provided on the left side of the filter plate (431), a drive shaft (433) is fixedly connected to the middle of the left side of the rotating plate (432), and brush bristles (434) are fixedly connected to the top and bottom of the left side of the rotating plate (432). The right side of the drive shaft (433) passes through the filter plate (431) and extends to the right side of the filter plate (431), and the bristles (434) are in contact with the filter plate (431) on the side closest to the filter plate (431).

5. The fermentation apparatus for grain liquor production according to claim 4, characterized in that: The waste housing (6) is fixedly connected to the left side of the bottom of the filter housing (42). The inner cavity of the waste housing (6) is provided with a receiving box (7), and a pull rod (8) is provided on the front side of the receiving box (7). The front side of the receiving box (7) penetrates through the waste shell (6) and extends to the outside of the waste shell (6) and is fixedly connected to the pull rod (8).

6. The fermentation apparatus for grain liquor production according to claim 1, characterized in that: The guide assembly (44) includes a guide housing (441) and an exhaust pipe (442). The guide housing (441) is fixedly connected to the filter housing (42) on the side near the filter housing (42). One end of the exhaust pipe (442) is fixedly connected to the guide housing (441), while the other end passes through the water seal tank (52) and extends to the bottom of the inner cavity of the water seal tank (52).

7. A fermentation apparatus for grain liquor production according to claim 6, characterized in that: A fixing frame (9) is fixedly connected to the inner cavity of the guide housing (441). A motor (10) is fixedly connected to the inner side of the fixing frame (9). The output shaft of the motor (10) passes through the filter housing (42) and extends to the inner cavity of the filter housing (42). An exhaust fan (11) is fixedly connected to the output shaft (433).

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