Filter assembly

Abstract

The utility model discloses a filter component, including first joint, second joint, filter chamber and connecting structure, first joint has exhaust outlet and first air inlet, first air inlet is provided around exhaust outlet, first air inlet and exhaust outlet are separated by first partition portion, second joint has exhaust inlet and second air inlet, the first air inlet is provided with second partition portion. The second air inlet is arranged around the exhaust inlet, the second air inlet and the exhaust inlet are separated through the second separating part, the filtering cavity is located between the first air inlet and the second air inlet, the first air inlet and the second air inlet are both communicated with the filtering cavity, a filtering body is arranged in the filtering cavity, and the connecting structure is arranged on the first separating part and the second separating part. And the connecting structure is arranged in the exhaust channel and can be used for butting the first joint and the second joint to form the filter cavity and the exhaust channel. The mounting structure is arranged in the exhaust channel and can avoid the filter cavity, so that the space of the filter cavity is complete, and the filter body is simple in structure and convenient to replace.

Description

Technical Field

[0001] The utility model relates to the relevant technical field, in particular to a filter component. Background Art

[0002] Gas wall-mounted boilers and other gas appliances are widely used in home environments. When the gas wall-mounted boiler is working, it will mix natural gas and air in a certain proportion and then burn them. The exhaust gas after combustion will be further discharged to the outside through the exhaust pipe. In the prior art, the exhaust pipe integrates smoke exhaust and air intake, and a filter is set in the exhaust pipe for filtering to prevent impurities from entering the wall-mounted boiler. In order to facilitate disassembly and assembly, the filter is generally set as an integrated filter flange for air intake and exhaust. The filter flange has a filter cavity inside, and the filter flange generally needs to dock the two flanges and connect them by fasteners in the circumferential direction of the flange. Therefore, the fasteners will penetrate the filter cavity, thereby occupying the filter cavity space, and the filter material must have a corresponding avoidance structure, making the filter material structure complex and difficult to install. For this reason, some filter flanges choose to adopt the left and right side installation method to keep the filter cavity intact, but such installation will result in poor connection stability, and there are many parts and a relatively complex structure. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a filter assembly that can solve the problem that the installation structure affects the filtering effect.

[0004] A filter assembly according to an embodiment of the first aspect of the utility model includes: a first joint, a second joint, a filter chamber and a connecting structure, the first joint having an exhaust outlet and a first air inlet, the first air inlet being arranged around the exhaust outlet, the first air inlet and the exhaust outlet being separated by a first partition, the second joint having an exhaust inlet and a second air inlet, the second air inlet being arranged around the exhaust inlet, the second air inlet and the exhaust inlet being separated by a second partition, the first partition being connected with the second partition to form an exhaust channel connecting the exhaust outlet and the exhaust inlet, the filter chamber being located between the first air inlet and the second air inlet, and the first air inlet and the second air inlet being both connected to the filter chamber, a filter body being arranged in the filter chamber, the connecting structure being arranged in the first partition and the second partition, and being located in the exhaust channel, the connecting structure being able to connect the first joint and the second joint to form the filter chamber and the exhaust channel.

[0005] A filter assembly according to an embodiment of the utility model has at least the following beneficial effects: the filter assembly is installed on the exhaust pipe, and when in use, the first partition part and the second partition part can separate the exhaust channel from the filter chamber, the external air enters the filter chamber from the first air inlet, and enters the gas furnace from the second air inlet after being filtered by the filter body in the filter chamber, and the smoke generated by the work enters the exhaust channel from the exhaust inlet and is discharged through the exhaust outlet. By arranging the installation structure in the exhaust channel, it can avoid the filter chamber, so that the space of the filter chamber is relatively complete, the structure of the filter body can be arranged relatively simply, and the filter body is easy to replace, and the installation structure is arranged at the exhaust channel without hindering the installation operation.

[0006] According to some embodiments of the utility model, the connection structure includes a first connection member and a second connection member, the first connection member is arranged on the inner side wall of the first partition portion, the second connection member is arranged on the inner side wall of the second partition portion, and the first connection member can be connected to the second connection member accordingly.

[0007] According to some embodiments of the utility model, the first connecting member includes a plurality of connecting columns, the connecting columns are extended along the axial direction of the exhaust outlet, and the connecting columns are provided with second connecting holes, the second connecting member includes a plurality of connecting blocks and a plurality of screws, the connecting blocks are provided with first connecting holes, the first connecting holes can correspond one-to-one with the second connecting holes, and the screws can connect the connecting blocks to the connecting columns through the first connecting holes and the second connecting holes.

[0008] According to some embodiments of the utility model, the first joint includes a first connecting plate and a first exhaust pipe, the first exhaust pipe is passed through the middle of the first connecting plate, the first exhaust pipe is the first partition, the first connecting plate has a first annular groove on one side close to the second joint, and the first air inlet is arranged on the bottom wall of the first annular groove.

[0009] According to some embodiments of the utility model, the second joint includes a second connecting plate, a second exhaust pipe and an intake pipe, the second exhaust pipe is passed through the intake pipe, and the intake pipe and the second exhaust pipe are connected by connecting ribs, the second exhaust pipe is the second partition, the intake pipe is connected to the middle part of the second connecting plate, the second connecting plate has a second annular groove on one side close to the first joint, and the first annular groove is connected to the second annular groove to form the filter chamber.

[0010] According to some embodiments of the utility model, the intake pipe is circumferentially provided with an annular connecting platform, the second connecting plate is provided with a plurality of third connecting holes, the connecting platform is provided with a plurality of fourth connecting holes, the third connecting holes can correspond one-to-one with the fourth connecting holes, and the third connecting holes and the fourth connecting holes can be connected by fasteners.

[0011] According to some embodiments of the utility model, the first connecting plate is provided with a condensation water groove, the condensation water groove is located in the first annular groove and is arranged close to the first exhaust pipe, and the condensation water groove is provided with a drain outlet.

[0012] According to some embodiments of the utility model, the condensation water tank includes a bottom plate and a side plate, the side plate is arranged at the outer end of the bottom plate, the inner end of the bottom plate is connected to the outer side wall of the first exhaust pipe, and the side plate, the bottom plate and the side wall of the first exhaust pipe form the condensation water tank.

[0013] According to some embodiments of the present invention, a smoke detection port is provided on the outer side wall of the first connection plate, and the smoke detection port is communicated with the exhaust passage.

[0014] According to some embodiments of the utility model, the first connecting disk is provided with a smoke detection tube, and the smoke detection tube is extended radially along the first connecting disk, one end of the smoke detection tube is connected to the smoke detection port, and the other end is connected to the exhaust channel.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a general schematic diagram of an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the other direction;

[0019] Figure 3 for Figure 1 Exploded diagram of

[0020] Figure 4 is a cross-sectional view of a filter assembly;

[0021] Figure 5 A cross-sectional view of the filter assembly.

[0022] Reference numerals:

[0023] The first joint 100, the exhaust outlet 110, the first air inlet 120, the first connecting plate 130, the first annular groove 131, the condensation water tank 132, the drain port 1321, the bottom plate 1322, the side plate 1323, the smoke detection port 133, the smoke detection tube 134, and the first exhaust pipe 140;

[0024] The second joint 200, the exhaust inlet 210, the second air inlet 220, the second connecting plate 230, the second annular groove 231, the third connecting hole 232, the second exhaust pipe 241, the air inlet pipe 242, the connecting platform 243, the connecting rib 244, and the fourth connecting hole 2431;

[0025] Filter chamber 300;

[0026] The connecting structure 400 , the connecting column 411 , the second connecting hole 4111 , the connecting block 421 , and the first connecting hole 4211 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Reference Figures 1 to 4According to a first embodiment of the utility model, a filter assembly includes a first joint 100, a second joint 200, a filter chamber 300 and a connecting structure 400, the first joint 100 has an exhaust outlet 110 and a first air inlet 120, the first air inlet 120 is arranged around the exhaust outlet 110, and the first air inlet 120 is separated from the exhaust outlet 110 by a first partition, the second joint 200 has an exhaust inlet 210 and a second air inlet 220, the second air inlet 220 is arranged around the exhaust inlet 210, and the second air inlet 220 is separated from the exhaust inlet 210 by a first partition. The second partition is separated, and the first partition and the second partition are connected to form an exhaust channel connecting the exhaust outlet 110 and the exhaust inlet 210. The filter chamber 300 is located between the first air inlet 120 and the second air inlet 220, and the first air inlet 120 and the second air inlet 220 are both connected to the filter chamber 300. A filter body is provided in the filter chamber 300. The connecting structure 400 is provided in the first partition and the second partition and is located in the exhaust channel. The connecting structure 400 can connect the first joint 100 and the second joint 200 to form the filter chamber 300 and the exhaust channel. The filter assembly is installed on the exhaust pipe. When in use, the first partition and the second partition can separate the exhaust channel from the filter chamber 300. The external air enters the filter chamber 300 from the first air inlet 120, and enters the gas furnace from the second air inlet 220 after being filtered by the filter body in the filter chamber 300. The smoke generated by the work enters the exhaust channel from the exhaust inlet 210 and is discharged through the exhaust outlet 110. By setting the installation structure in the exhaust channel, it can avoid the filter chamber 300, so that the space of the filter chamber 300 is relatively complete, and the structure of the filter body can be set relatively simply, which is convenient for replacing the filter body, and the installation structure is set at the exhaust channel without hindering the installation operation.

[0031] Specifically, the first joint 100 and the second joint 200 are connected through the connecting structure 400. It can be understood that the first joint 100 and the second joint 200 are connected in the axial direction, and the connecting structure 400 is arranged in the exhaust channel. The specific connection form is not limited. During installation and connection, the user can insert the installation tool at the exhaust inlet 210 for operation, which will not hinder the installation, and the first joint 100 and the second joint 200 are fastened in the axial direction, which can improve the stability of the connection. Moreover, the first partition and the second partition separate the filter chamber 300 from the exhaust channel, and the filter chamber 300 can be free from the space occupied by the connecting structure 400, which can increase the filtering area, and the filter body can adopt a regular shape, wherein the filter body can adopt filter materials such as filter sponge, and when replacement is needed, a first joint 100 or a second joint 200 can be disassembled, which is convenient for replacement and easy to use.

[0032] Reference Figure 4In some embodiments of the present invention, the connection structure 400 includes a first connection member and a second connection member, the first connection member is arranged on the inner wall of the first partition, the second connection member is arranged on the inner wall of the second partition, and the first connection member can be connected to the second connection member accordingly.

[0033] Specifically, the first connecting member can be arranged on the inner side wall of the first partition and can extend to the end. Similarly, the second connecting member is arranged on the inner side wall of the second partition and extends to the end to dock with the first connecting member. The specific connecting member can be a snap connection, a threaded connection, a fastener connection, etc., and the specific form is not limited. The first connecting member and the second connecting member can be integrated with the first partition and the second partition to facilitate manufacturing.

[0034] Reference Figure 4 In some embodiments of the utility model, the first connecting member includes a plurality of connecting columns 411, which are extended along the axial direction of the exhaust outlet 110, and the connecting columns 411 are provided with second connecting holes 4111. The second connecting member includes a plurality of connecting blocks 421 and a plurality of screws, and the connecting blocks 421 are provided with first connecting holes 4211. The first connecting holes 4211 can correspond one-to-one with the second connecting holes 4111, and the screws can connect the connecting blocks 421 to the connecting columns 411 through the first connecting holes 4211 and the second connecting holes 4111.

[0035] Specifically, the connecting column 411 may be provided with a second connecting hole 4111, the second connecting hole 4111 is extended axially along the connecting column 411, the connecting block 421 is provided with an inwardly protruding arrangement, the connecting block 421 is provided with a first connecting hole 4211 that penetrates axially, the connecting column 411 and the connecting block 421 may be arranged evenly spaced in the circumferential direction, during installation, the connecting column 411 and the connecting block 421 need to be aligned, the second connecting hole 4111 may be a threaded hole, a screw may pass through the first connecting hole 4211 and be threadedly connected with the second connecting hole 4111, so as to press the connecting block 421 tightly against the connecting column 411, thereby connecting the first joint 100 with the second joint 200, generally the first joint 100 and the second joint 200 are plastic parts, the second connecting hole 4111 may also be a light hole, and the screw may be directly drilled into the hole for installation. During installation, only a screwdriver needs to be inserted into the exhaust inlet 210 and the screw is screwed, which is convenient for installation and has a tight connection.

[0036] It should be noted that the first connecting member and the second connecting member are not limited to the above embodiments, and other embodiments may be adopted. For example, the first connecting member and the second connecting member may be threaded tubes and may be connected with each other by threaded connection.

[0037] Reference Figures 1 to 4In some embodiments of the utility model, the first joint 100 includes a first connecting plate 130 and a first exhaust pipe 140. The first exhaust pipe 140 is arranged in the middle of the first connecting plate 130. The first exhaust pipe 140 is a first partition. The first connecting plate 130 has a first annular groove 131 on the side close to the second joint 200. The first air inlet 120 is arranged on the bottom wall of the first annular groove 131.

[0038] Specifically, the first exhaust pipe 140 and the first connecting plate 130 can be integrally injection molded, the first exhaust pipe 140 is the first partition, the pipe mouth of the first exhaust pipe 140 is the exhaust outlet 110, the first exhaust pipe 140 can be connected to the external exhaust pipe sleeve, and the first connecting plate 130 is connected to the external air intake pipe, the first annular groove 131 can be used to place filter materials, the air inlet and exhaust pipes are nested, and the first air inlet 120 is arranged around the first exhaust pipe 140 to achieve integrated air intake and exhaust, which can save space.

[0039] Reference Figures 1 to 4 In some embodiments of the utility model, the second joint 200 includes a second connecting plate 230, a second exhaust pipe 241 and an intake pipe 242. The second exhaust pipe 241 is inserted into the intake pipe 242, and the intake pipe 242 is connected to the second exhaust pipe 241 through a connecting rib 244. The second exhaust pipe 241 is a second partition. The intake pipe 242 is connected to the middle part of the second connecting plate 230. The second connecting plate 230 has a second annular groove 231 on the side close to the first joint 100. The first annular groove 131 is connected to the second annular groove 231 to form a filter chamber 300.

[0040] Specifically, the second exhaust pipe 241 and the air intake pipe 242 can be integrally injection molded, and the second exhaust pipe 241 and the air intake pipe 242 are coaxially arranged and connected by a connecting rib 244. The second exhaust pipe 241 is the exhaust inlet 210, and the gap between the second exhaust pipe 241 and the air intake pipe 242 is the second air intake port 220. The second exhaust pipe 241 can be sleeved with an exhaust connecting pipe, and the air intake pipe 242 can be sleeved with an air intake connecting pipe. The exhaust connecting pipe and the air intake connecting pipe are connected to the gas furnace to achieve coaxial air intake and exhaust, and the structure is compact.

[0041] Reference Figures 1 to 4 In some embodiments of the utility model, an annular connecting platform 243 is circumferentially provided on the air intake pipe 242, the second connecting plate 230 is provided with a plurality of third connecting holes 232, the connecting platform 243 is provided with a plurality of fourth connecting holes 2431, the third connecting holes 232 can correspond one-to-one with the fourth connecting holes 2431, and the third connecting holes 232 and the fourth connecting holes 2431 can be connected by fasteners.

[0042] Specifically, the air intake pipe 242 and the second connecting plate 230 can be detachably connected, so that the second connecting plate 230 can be quickly disassembled to facilitate the replacement of the filter material, and the second connecting plate 230 can be evenly arranged with the third connecting holes 232 in the circumferential direction, and the connecting platform 243 is correspondingly arranged with the fourth connecting hole 2431. It can be understood that a positioning structure can be set on the connecting platform 243 and the second connecting plate 230 to facilitate positioning connection, and the third connecting hole 232 and the fourth connecting hole 2431 can be connected by tightening with screws for easy disassembly.

[0043] Reference Figures 1 to 5 In some embodiments of the present invention, the first connecting plate 130 is provided with a condensation water tank 132 , which is located in the first annular groove 131 and is arranged close to the first exhaust pipe 140 , and the condensation water tank 132 is provided with a drain port 1321 .

[0044] Specifically, condensed water will be generated on the outer wall of the exhaust pipe when in use. The condensed water tank 132 can receive the condensed water sliding down the pipe wall and discharge it through the drain port 1321 to prevent the condensed water from flowing back into the gas furnace.

[0045] Reference Figures 1 to 5 In some embodiments of the present invention, the condensation water tank 132 includes a bottom plate 1322 and a side plate 1323, the side plate 1323 is arranged at the outer end of the bottom plate 1322, the inner end of the bottom plate 1322 is connected to the outer wall of the first exhaust pipe 140, and the side plate 1323, the bottom plate 1322 and the side wall of the first exhaust pipe 140 form the condensation water tank 132.

[0046] Specifically, the bottom plate 1322 is connected around the outer wall of the first exhaust pipe 140, and the side plate 1323 is extended upward so that the first exhaust pipe 140, the bottom plate 1322 and the side plate 1323 form a condensation water tank 132. It can be understood that the side plate 1323, the bottom plate 1322 and the first exhaust pipe 140 can be injection molded as a whole for easy manufacturing.

[0047] Reference Figure 3 In some embodiments of the present invention, a smoke detection port 133 is provided on the outer wall of the first connection plate 130, and the smoke detection port 133 is connected to the exhaust passage. The user can probe into the detector through the smoke detection port 133 to detect the smoke, which is convenient for inspection and maintenance.

[0048] Reference Figure 3In some embodiments of the utility model, the first connection disk 130 is provided with a smoke detection tube 134, and the smoke detection tube 134 is arranged to extend radially along the first connection disk 130. One end of the smoke detection tube 134 is connected to the smoke detection port 133, and the other end is connected to the exhaust passage. The first connection disk 130 can be integrally formed with the smoke detection tube 134 to facilitate manufacturing. The smoke detection tube 134 can be directly connected to the exhaust passage. It is understandable that the smoke detection port 133 is provided with a plug switch, which can be closed during normal use to prevent smoke leakage.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A filter assembly, characterized in that: include: A first joint (100) having an exhaust outlet (110) and a first air inlet (120), wherein the first air inlet (120) is arranged around the exhaust outlet (110), and the first air inlet (120) and the exhaust outlet (110) are separated by a first partition; A second joint (200) having an exhaust inlet (210) and a second air inlet (220), wherein the second air inlet (220) is arranged around the exhaust inlet (210), the second air inlet (220) and the exhaust inlet (210) are separated by a second partition, and the first partition and the second partition are connected to form an exhaust passage connecting the exhaust outlet (110) and the exhaust inlet (210); A filter chamber (300) is located between the first air inlet (120) and the second air inlet (220), and the first air inlet (120) and the second air inlet (220) are both in communication with the filter chamber (300), and a filter body is provided in the filter chamber (300); A connection structure (400) is provided at the first partition and the second partition and is located in the exhaust passage. The connection structure (400) is capable of connecting the first joint (100) and the second joint (200) to form the filter cavity (300) and the exhaust passage.

2. A filter assembly according to claim 1, characterized in that: The connection structure (400) comprises a first connection member and a second connection member, wherein the first connection member is arranged on the inner side wall of the first partition, and the second connection member is arranged on the inner side wall of the second partition, and the first connection member can be connected to the second connection member in correspondence.

3. A filter assembly according to claim 2, characterized in that: The first connecting member includes a plurality of connecting columns (411), the connecting columns (411) are extended along the axial direction of the exhaust outlet (110), and the connecting columns (411) are provided with a second connecting hole (4111); the second connecting member includes a plurality of connecting blocks (421) and a plurality of screws, the connecting blocks (421) are provided with a first connecting hole (4211), the first connecting hole (4211) can correspond to the second connecting hole (4111) one by one, and the screws can connect the connecting blocks (421) to the connecting columns (411) through the first connecting holes (4211) and the second connecting holes (4111).

4. A filter assembly according to claim 1, characterized in that: The first joint (100) comprises a first connecting plate (130) and a first exhaust pipe (140), wherein the first exhaust pipe (140) is arranged through the middle of the first connecting plate (130), the first exhaust pipe (140) is the first partition, and the first connecting plate (130) has a first annular groove (131) on one side close to the second joint (200), and the first air inlet (120) is arranged on the bottom wall of the first annular groove (131).

5. A filter assembly according to claim 4, characterized in that: The second joint (200) comprises a second connecting plate (230), a second exhaust pipe (241) and an intake pipe (242); the second exhaust pipe (241) is inserted into the intake pipe (242), and the intake pipe (242) and the second exhaust pipe (241) are connected via a connecting rib (244); the second exhaust pipe (241) is the second partition; the intake pipe (242) is connected to the middle of the second connecting plate (230); the second connecting plate (230) has a second annular groove (231) on one side close to the first joint (100); the first annular groove (131) and the second annular groove (231) are butted against each other to form the filter cavity (300).

6. A filter assembly according to claim 5, characterized in that: The air intake pipe (242) is circumferentially provided with an annular connecting platform (243), the second connecting plate (230) is provided with a plurality of third connecting holes (232), the connecting platform (243) is provided with a plurality of fourth connecting holes (2431), the third connecting holes (232) can correspond one-to-one with the fourth connecting holes (2431), and the third connecting holes (232) and the fourth connecting holes (2431) can be connected by fasteners.

7. A filter assembly according to claim 4, characterized in that: The first connecting plate (130) is provided with a condensation water groove (132), the condensation water groove (132) is located in the first annular groove (131) and is arranged close to the first exhaust pipe (140), and the condensation water groove (132) is provided with a drainage port (1321).

8. A filter assembly according to claim 7, characterized in that: The condensation water tank (132) includes a bottom plate (1322) and a side plate (1323), wherein the side plate (1323) is arranged at the outer end of the bottom plate (1322), and the inner end of the bottom plate (1322) is connected to the outer side wall of the first exhaust pipe (140), and the side plate (1323), the bottom plate (1322) and the side wall of the first exhaust pipe (140) form the condensation water tank (132).

9. A filter assembly according to claim 4, characterized in that: The outer side wall of the first connection plate (130) is provided with a smoke detection port (133), and the smoke detection port (133) is communicated with the exhaust passage.

10. A filter assembly according to claim 9, characterized in that: The first connection disk (130) is provided with a smoke detection tube (134), and the smoke detection tube (134) is arranged to extend radially along the first connection disk (130), and one end of the smoke detection tube (134) is connected to the smoke detection port (133), and the other end is connected to the exhaust passage.

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