A battery drying oven based on improved sealing method and equipped with exhaust gas treatment device

Abstract

This utility model relates to the field of battery drying oven technology, and provides a battery drying oven based on an improved sealing method and an added exhaust gas treatment device. It includes a drying oven body and a sealing assembly fixed to the outer surface of the drying oven body, comprising multiple hydraulic cylinders. In use, the piston rods of the hydraulic cylinders extend, pushing the first adjusting arm to rotate clockwise around a pivot connected to the drying oven body. Simultaneously, the second adjusting arm rotates synchronously around a pivot connected to a connecting plate, moving the oven door towards the opening of the drying oven body until the fluororubber sealing ring at the edge of the oven door completely fits the edge of the opening. Two protective covers shield the connecting plate, hydraulic cylinders, and connectors to prevent accidental contact by personnel. The coordinated operation of these components ensures a precise fit between the oven door and the drying oven body, preventing heat loss and exhaust gas leakage, thus guaranteeing drying efficiency and operational safety.

Description

Technical Field

[0001] This utility model relates to the field of battery drying oven technology, and in particular to a battery drying oven based on an improved sealing method and an added exhaust gas treatment device. Background Technology

[0002] In the battery production process, drying is a key step to ensure the quality and performance of the finished battery. As a core piece of equipment, the battery drying oven's operational stability directly determines the accuracy of battery moisture control and production efficiency.

[0003] However, in existing technologies, the sealing performance of battery drying ovens is inadequate. Some battery drying ovens have gaps in their sealing structure or unreasonable sealing methods, which makes it easy for heat energy inside the oven to escape, resulting in a decrease in the temperature stability inside the oven. This significantly reduces the energy efficiency and processing efficiency of heating and drying. Furthermore, during the drying process of batteries, the batteries release exhaust gases containing volatile components. Existing battery drying ovens usually lack exhaust gas collection and purification devices. If untreated exhaust gases accumulate inside the oven, they will affect the cleanliness of the drying environment, leading to uneven battery drying. Long-term emissions may pollute the working environment, and harmful substances in the exhaust gases may also react with the battery surface, affecting the finished product quality and performance stability of the batteries. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing battery drying ovens, such as poor sealing performance, gaps in the sealing structure, or unreasonable sealing methods. These issues lead to heat loss from the oven, resulting in decreased temperature stability and significantly reduced energy efficiency and processing capacity. Furthermore, during the drying process, batteries release exhaust gases containing volatile components, and existing battery drying ovens typically lack exhaust gas collection and purification devices. Accumulation of untreated exhaust gases within the oven affects the cleanliness of the drying environment, leading to uneven battery drying. Long-term emissions may pollute the working environment, and harmful substances in the exhaust gases may react with the battery surface, affecting the finished battery quality and performance stability.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a battery drying oven based on an improved sealing method and an added exhaust gas treatment device: comprising a drying oven body, and further comprising: The sealing assembly, fixed to the outer surface of the drying oven body, includes multiple hydraulic cylinders; The exhaust gas treatment assembly, located on one side of the drying oven body, includes an exhaust gas filter box; There are three furnace doors, located on one side surface of the drying furnace body.

[0006] In a preferred embodiment, the sealing assembly further includes: Multiple connecting plates are provided and fixed to the outer surface of the drying oven body; Multiple connectors are provided and are rotatably connected to one side of multiple connecting plates; The outer surfaces of multiple hydraulic cylinders are fixed to one side of multiple connectors.

[0007] The technical advantages of adopting the above-mentioned further solution are as follows: multiple connecting plates are fixed on the outer surface of the drying oven body, providing a stable installation foundation for the connectors; multiple connectors rotatably connect the connecting plates and the hydraulic cylinder, which can distribute the installation force of the hydraulic cylinder and avoid overloading of a single component; at the same time, through the rotation characteristics of the connectors, the angle changes during the extension and retraction of the hydraulic cylinder can be adapted to ensure that the outer surface of the hydraulic cylinder is fixed and stable, providing reliable support for subsequent power transmission and reducing the risk of seal failure due to unstable installation.

[0008] In a preferred embodiment, the sealing assembly further includes: The first adjusting arm, which is provided in multiple parts, is rotatably connected to the outer surface of the drying oven body via a rotating shaft; The second adjusting arm, which is provided in multiple parts, is rotatably connected to the outer surface of the drying oven body via a rotating shaft; Among them, one end of multiple first adjusting arms is rotatably connected to the output end of multiple hydraulic cylinders via a rotating shaft, one end of multiple second adjusting arms is rotatably connected to one side of multiple connecting plates via a rotating shaft, and one end of multiple first adjusting arms and multiple second adjusting arms is fixed to the outer surface of three furnace doors.

[0009] The technical effects of adopting the above-mentioned further solution are as follows: multiple first adjusting arms transmit the output power of the hydraulic cylinder to the furnace door, and multiple second adjusting arms restrict the movement trajectory of the furnace door through rotational connection with the connecting plate; the two work together to ensure that the three furnace doors are evenly stressed, avoiding poor sealing caused by unilateral force deviation of the furnace door; and through the design of rotating shaft connection, the furnace door can move smoothly, ensuring that the furnace door and the drying furnace body fit precisely, effectively blocking heat loss and exhaust gas leakage in the furnace, and adapting to the synchronous sealing requirements of multiple furnace doors.

[0010] In a preferred embodiment, two protective covers are fixedly connected to the outer surface of the drying oven body, and the two protective covers are arranged in a mirror image.

[0011] The technical effects of adopting the above-mentioned further solution are as follows: the two mirror-mounted protective covers can fully cover the moving parts of the sealing components such as the connecting plate, hydraulic cylinder, and connectors. On the one hand, it can isolate external dust and debris from contact with the moving parts, reduce wear on the parts, and extend the service life of the sealing components. On the other hand, it can prevent workers from accidentally touching the operating parts and avoid safety accidents. The mirror layout ensures that the sealing components on both sides of the drying oven body are protected, improving the overall safety and reliability of the equipment.

[0012] In a preferred embodiment, the exhaust gas treatment assembly further includes: The exhaust gas delivery pipe is connected to the upper surface of the drying oven body, and one end is connected to the outer surface of the exhaust gas filter box. The duct fan is connected to the outer surface of the exhaust gas delivery pipe.

[0013] The technical effects of adopting the above-mentioned further solution are as follows: the exhaust gas delivery pipe connects the drying furnace body and the exhaust gas filter box, providing a directional flow channel for the exhaust gas and preventing the exhaust gas from spreading around the furnace body; the pipeline fan is connected to the exhaust gas delivery pipe, and generates negative pressure when operating, which can quickly draw the exhaust gas in the drying furnace body into the delivery pipe and send it to the filter box, improve the exhaust gas collection efficiency, prevent the accumulation of exhaust gas in the furnace from affecting the battery drying quality, and at the same time provide stable airflow power for the subsequent exhaust gas filtration stage.

[0014] In a preferred embodiment, the exhaust gas treatment assembly further includes: The drawer is slidably embedded inside the exhaust gas filter box on its outer surface. The exhaust pipe is connected to one side of the exhaust gas filter box and is positioned opposite to the exhaust gas delivery pipe. The drawer is equipped with filter material inside.

[0015] The technical advantages of adopting the above-mentioned further solution are: the drawer is slidably embedded in the exhaust gas filter box, and the filter material inside can be easily pulled out and replaced without disassembling the filter box, reducing the difficulty and time cost of maintenance operations; the exhaust pipe and the exhaust gas delivery pipe are set opposite to each other, which can guide the exhaust gas to fully pass through the filter material in the filter box, prolong the contact time between the exhaust gas and the filter material, improve the adsorption effect of harmful impurities, ensure that the exhaust gas meets the emission standards, and reduce the intensity of equipment operation and maintenance.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In use, the piston rod of the hydraulic cylinder extends, pushing the first adjusting arm to rotate clockwise around the pivot connected to the drying oven body. Simultaneously, the second adjusting arm rotates synchronously around the pivot connected to the connecting plate, moving the oven door toward the opening of the drying oven body until the fluororubber sealing ring at the edge of the oven door completely fits the edge of the opening of the drying oven body. The hydraulic cylinder then stops operating to complete the sealing. Two protective covers shield the connecting plate, hydraulic cylinder, and connecting parts to prevent accidental contact by personnel. All components work together to achieve precise fitting between the oven door and the drying oven body, preventing heat loss and exhaust gas leakage, and ensuring drying efficiency and operational safety.

[0017] In this invention, after the drying furnace body begins to heat up and exhaust gas is generated inside the furnace, the duct fan is started. The negative pressure generated by the fan will draw the exhaust gas from the interface on the upper surface of the drying furnace body into the exhaust gas delivery pipe. The exhaust gas is then sent to the exhaust gas filter box along the exhaust gas delivery pipe. Under the guidance of the airflow, the exhaust gas passes evenly through the filter material in the drawer. The filter material adsorbs and traps harmful impurities. The qualified exhaust gas is discharged from the exhaust pipe set opposite to the exhaust gas delivery pipe. During use, the machine can be stopped periodically, the drawer can be pulled out to check the filter material. If it needs to be replaced, it can be replaced and then pushed back and locked. There is no need to disassemble the entire exhaust gas filter box, which ensures a clean drying environment and improves the drying effect of the battery, as well as the quality and performance stability of the finished product. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of a battery drying oven based on an improved sealing method and an added exhaust gas treatment device provided for this utility model; Figure 2 A schematic diagram of the sealing assembly and exhaust gas treatment assembly of a battery drying oven based on an improved sealing method and an added exhaust gas exhaust treatment device provided by this utility model. Figure 3 A schematic diagram of the sealing assembly structure of a battery drying oven based on an improved sealing method and an added exhaust gas treatment device, provided for this utility model. Figure 4 A schematic diagram of the exhaust gas treatment component of a battery drying oven based on an improved sealing method and an added exhaust gas exhaust treatment device, provided for this utility model. Figure 5 This is a rear view structural diagram of a battery drying oven based on an improved sealing method and an added exhaust gas treatment device, which is provided for this utility model.

[0019] Legend: 1. Drying oven body; 2. Oven door; 3. First adjusting arm; 4. Second adjusting arm; 5. Protective cover; 6. Tail gas conveying pipe; 7. Pipe fan; 8. Tail gas filter box; 9. Drawer; 10. Exhaust pipe; 11. Connecting plate; 12. Hydraulic cylinder; 13. Connecting parts. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1 Please see Figures 1-5This embodiment provides a battery drying oven based on an improved sealing method and an added exhaust gas treatment device. The specific idea is as follows: As one specific implementation, it includes a drying oven body 1, and further includes: A sealing assembly, fixed to the outer surface of the drying oven body 1, includes multiple hydraulic cylinders 12; The exhaust gas treatment assembly is located on one side of the drying oven body 1, and includes an exhaust gas filter box 8. There are three furnace doors 2, which are located on one side surface of the drying furnace body 1.

[0022] As one specific implementation, the sealing assembly further includes: Multiple connecting plates 11 are provided and fixed to the outer surface of the drying oven body 1; Multiple connectors 13 are provided and are rotatably connected to one side of multiple connecting plates 11; The outer surfaces of multiple hydraulic cylinders 12 are fixed to one side of multiple connectors 13; The first adjusting arm 3 is provided in multiple parts and is rotatably connected to the outer surface of the drying oven body 1 via a rotating shaft; The second adjusting arm 4 is provided in multiple parts and is rotatably connected to the outer surface of the drying oven body 1 via a rotating shaft; Among them, one end of multiple first adjusting arms 3 is rotatably connected to the output end of multiple hydraulic cylinders 12 via a rotating shaft, one end of multiple second adjusting arms 4 is rotatably connected to one side of multiple connecting plates 11 via a rotating shaft, and one end of multiple first adjusting arms 3 and multiple second adjusting arms 4 is fixed to the outer surface of three furnace doors 2.

[0023] In this embodiment, the specific type of sealing assembly can be various, and this application does not limit it. In an optional embodiment, as an example of a sealing assembly, the sealing assembly includes: a first adjusting arm 3, a second adjusting arm 4, a connecting plate 11, a hydraulic cylinder 12, and a connecting piece 13. The specific quantity of each component is as follows: Figures 2-5 As shown, the settings are as follows: In this embodiment, a first adjusting arm 3 is provided, one end of which is rotatably connected to one end of the hydraulic cylinder 12, and the other end is rotatably connected to one side of the furnace door 2. One side surface is rotatably connected to the outer surface of the drying furnace body 1 through a rotating shaft. After the first adjusting arm 3 is subjected to force, it rotates around the rotating shaft of the drying furnace body 1.

[0024] The two ends of the second adjusting arm 4, which is used to limit the movement trajectory, are respectively connected to one side of the furnace door 2 and the connecting plate 11 via a rotating shaft, thereby limiting the angle of the furnace door 2 when it moves.

[0025] The connecting plate 11, which provides installation space, is fixed to the outer surface of the drying oven body 1 by a plurality of hexagonal bolts.

[0026] The hydraulic cylinder 12, which provides kinetic energy, is fixed to one side surface of the connector 13 by hexagonal bolts.

[0027] The connecting member 13, which provides support, is rotatably connected to one side of the connecting plate 11 via a rotating shaft. When the hydraulic cylinder 12 extends or retracts, the connecting member 13 rotates to adjust the angle of the hydraulic cylinder 12.

[0028] In one specific implementation, two protective covers 5 are fixedly connected to the outer surface of the drying oven body 1, and the two protective covers 5 are arranged in a mirror image.

[0029] In this embodiment, during use, the piston rod of the hydraulic cylinder 12 extends, pushing the first adjusting arm 3 to rotate clockwise around the pivot connected to the drying oven body 1. Simultaneously, the second adjusting arm 4 rotates synchronously around the pivot connected to the connecting plate 11, causing the oven door 2 to move towards the opening of the drying oven body 1. The connecting piece 13 rotates around the pivot connected to the connecting plate 11 as the hydraulic cylinder 12 extends and retracts, adaptively adjusting the tilt angle of the hydraulic cylinder 12 to ensure stable power transmission until the fluororubber sealing ring at the edge of the oven door 2 completely fits the opening edge of the drying oven body 1. The hydraulic cylinder 12 then stops operating, completing the seal. The two protective covers 5 shield the connecting plate 11, the hydraulic cylinder 12, and the connecting piece 13 to prevent accidental contact by personnel. By transmitting power through the first adjusting arm 3 and limiting the trajectory through the second adjusting arm 4, combined with the adaptive adjustment of the angle of the connecting piece 13, precise fitting between the oven door 2 and the drying oven body 1 is achieved, preventing heat loss from the oven through the door gaps during the drying process, improving drying efficiency, and preventing exhaust gas leakage from the oven, ensuring a safe operating environment.

[0030] Example 2 like Figures 1-5 As shown, based on Embodiment 1, this embodiment also provides an exhaust gas treatment component, which is disposed on one side of the drying oven body 1 and includes an exhaust gas filter box 8. The exhaust gas delivery pipe 6 is connected to the upper surface of the drying oven body 1, and one end is connected to the outer surface of the exhaust gas filter box 8. The duct fan 7 is connected to the outer surface of the exhaust gas delivery pipe 6.

[0031] Drawer 9 is slidably embedded inside the exhaust gas filter box 8 on its outer surface; The exhaust pipe 10 is connected to one side of the exhaust gas filter box 8 and is positioned opposite to the exhaust gas delivery pipe 6. Drawer 9 has filter material installed inside.

[0032] In this embodiment, the specific type of exhaust gas treatment component can be various, and this application does not limit it. In an optional embodiment, as an example of an exhaust gas treatment component, the component includes: an exhaust gas delivery pipe 6, a duct fan 7, an exhaust gas filter box 8, a drawer 9, and an exhaust pipe 10. The specific quantity of each component is as follows: Figure 1 and Figure 2 As shown, the settings are as follows: In this embodiment, an exhaust gas conveying pipe 6 is provided, which is fixed on the upper surface of the drying oven body 1 and communicates with the drying oven body 1 to provide an exhaust gas conveying path.

[0033] The duct fan 7, which provides power for the exhaust gas conveying process, can create a negative pressure inside the exhaust gas conveying pipe 6 after starting, providing driving force for the exhaust gas to be discharged from the drying oven body 1.

[0034] The exhaust gas filter box 8, which is used to hold filter media and perform filtration, is fixedly installed on the ground on one side of the drying oven body 1. Its outer surface is connected to one end of the exhaust gas conveying pipe 6 and one end of the exhaust pipe 10, respectively. The box has a sliding track for the drawer 9.

[0035] The drawer 9, which is used to hold the filter media and is easy to maintain, has an outer surface that slides into the track inside the exhaust gas filter box 8. The open end of the drawer 9 is equipped with a handle. When closed, the outer surface of the drawer 9 fits tightly against the inner wall of the exhaust gas filter box 8, preventing exhaust gas from being directly discharged from the drawer 9 through the gaps and around the filter media.

[0036] The exhaust pipe 10, used to discharge the purified exhaust gas, is connected to the side of the exhaust gas filter box 8 away from the exhaust gas delivery pipe 6, and the pipe opening faces in accordance with the workshop exhaust specifications. It is set opposite to the exhaust gas delivery pipe 6 so that the exhaust gas must pass through the filter material area completely along the internal channel after entering the exhaust gas filter box 8.

[0037] In this embodiment, after the drying oven body 1 starts heating and exhaust gas is generated inside the oven, the duct fan 7 is started. The negative pressure generated by its operation will draw the exhaust gas (including impurity gases volatilized during battery drying) inside the drying oven body 1 into the exhaust gas delivery pipe 6 through the interface on the upper surface of the oven body. The exhaust gas is sent to the exhaust gas filter box 8 along the exhaust gas delivery pipe 6. The exhaust gas entering the box is guided by the airflow and will pass evenly through the filter material in the drawer 9. The filter material adsorbs and traps harmful impurities in the exhaust gas. The qualified exhaust gas after filtration and purification then exits from the exhaust outlet set opposite to the exhaust gas delivery pipe 6. Pipe 10 discharges, completing the exhaust gas treatment process. During use, the machine can be stopped periodically and the drawer 9 can be pulled out to check the adsorption saturation of the filter material. If there is obvious accumulation of impurities on the surface of the filter material or the adsorption capacity decreases, the filter material in the drawer 9 can be replaced directly. Then, the drawer 9 can be pushed back into the exhaust gas filter box 8 and re-locked to restore the filtration effect of the exhaust gas treatment component. There is no need to disassemble the entire exhaust gas filter box 8 to ensure the cleanliness of the dry environment, improve the battery drying effect, and ensure the finished product quality and performance stability of the battery. The filter material is honeycomb activated carbon and zinc oxide particles.

[0038] In addition, a battery pack may be provided in this application to provide power to the devices inside the drying oven body 1. The circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0039] Working principle: The connector 13 rotates around the pivot connected to the connecting plate 11 as the hydraulic cylinder 12 extends and retracts, adaptively adjusting the tilt angle of the hydraulic cylinder 12 to ensure stable power transmission. Simultaneously, the piston rod of the hydraulic cylinder 12 extends, pushing the first adjusting arm 3 to rotate clockwise around the pivot connected to the drying oven body 1. The second adjusting arm 4 also rotates synchronously around the pivot connected to the connecting plate 11. While the first adjusting arm 3 transmits power, the second adjusting arm 4 restricts the movement trajectory of the oven door 2, thereby driving the oven door 2 to move towards the opening of the drying oven body 1 until the fluororubber sealing ring at the edge of the oven door 2 completely fits the edge of the opening of the drying oven body 1. The hydraulic cylinder 12 then stops, completing the sealing operation. During this period, the two protective covers 5 will shield the connecting plate 11, the hydraulic cylinder 12, and the connector 13.

[0040] When the exhaust gas treatment component is working, the duct fan 7 first generates negative pressure to drive the flow of exhaust gas. This negative pressure draws the exhaust gas containing impurities generated during the battery drying process inside the drying oven body 1 from the interface on the outer surface of the drying oven body 1. Subsequently, the exhaust gas is transported along the exhaust gas delivery pipe 6 to the interior of the exhaust gas filter box 8. The airflow guidance effect inside the exhaust gas filter box 8 allows the exhaust gas to pass evenly through the filter media in the filter drawer 9. The filter media purifies the harmful impurities in the exhaust gas through adsorption and interception. The purified and qualified exhaust gas is finally discharged from the exhaust pipe 10, which is set opposite to the exhaust gas delivery pipe 6, completing the exhaust gas treatment and discharge. During use, the drawer 9 can be pulled out after periodic shutdown to check the adsorption saturation of the filter media. If there is obvious accumulation of impurities on the surface of the filter media or a decrease in adsorption capacity, the filter media in the drawer 9 can be replaced directly, and then the drawer 9 can be pushed back into the exhaust gas filter box 8 and re-locked.

[0041] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0042] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A battery drying oven based on an improved sealing method and equipped with an exhaust gas treatment device, comprising a drying oven body (1), characterized in that, Also includes: A sealing assembly, fixed to the outer surface of the drying oven body (1), includes multiple hydraulic cylinders (12); The exhaust gas treatment assembly is located on one side of the drying oven body (1) and includes an exhaust gas filter box (8). There are three furnace doors (2), which are located on one side surface of the drying furnace body (1).

2. The battery drying oven according to claim 1, which is based on an improved sealing method and includes an exhaust gas treatment device, is characterized in that... The sealing assembly further includes: Multiple connecting plates (11) are provided and fixed to the outer surface of the drying oven body (1); Multiple connectors (13) are provided and are rotatably connected to one side of multiple connecting plates (11); The outer surfaces of multiple hydraulic cylinders (12) are fixed to one side of multiple connectors (13).

3. The battery drying oven according to claim 1, characterized in that, based on an improved sealing method and the addition of a tail gas exhaust treatment device, The sealing assembly further includes: The first adjusting arm (3) is provided in multiple parts and is rotatably connected to the outer surface of the drying oven body (1) via a rotating shaft; The second adjusting arm (4) is provided in multiple parts and is rotatably connected to the outer surface of the drying oven body (1) via a rotating shaft; One end of each of the first adjusting arms (3) is rotatably connected to the output end of each of the hydraulic cylinders (12) via a rotating shaft, and one end of each of the second adjusting arms (4) is rotatably connected to one side of each of the connecting plates (11) via a rotating shaft. One end of each of the first adjusting arms (3) and the second adjusting arms (4) is fixed to the outer surface of the three furnace doors (2).

4. The battery drying oven according to claim 3, which is based on an improved sealing method and includes an exhaust gas treatment device, is characterized in that... Two protective covers (5) are fixedly connected to the outer surface of the drying oven body (1), and the two protective covers (5) are set in a mirror image.

5. The battery drying oven according to claim 1, characterized in that, based on an improved sealing method and the addition of a tail gas exhaust treatment device, The exhaust gas treatment assembly also includes: The exhaust gas delivery pipe (6) is connected to the upper surface of the drying furnace body (1), and one end is connected to the outer surface of the exhaust gas filter box (8). The duct fan (7) is connected to the outer surface of the exhaust gas delivery pipe (6).

6. The battery drying oven based on the improved sealing method and the addition of a tail gas exhaust treatment device according to claim 5, characterized in that, The exhaust gas treatment assembly also includes: The drawer (9) is slidably embedded in the interior of the exhaust gas filter box (8) on its outer surface; The exhaust pipe (10) is connected to one side of the exhaust gas filter box (8) and is positioned opposite to the exhaust gas delivery pipe (6); The drawer (9) is equipped with filter material inside.

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