Filter element assembly and filter

Abstract

The invention discloses a filter element assembly and a filter, and relates to the field of filters. The filter element assembly comprises a filter element column, a first retainer and a rotating part. And the plurality of filter element columns are distributed side by side along the width direction of the filter element columns. The two ends of the filter element column in the length direction are the first end and the second end. The retainer I sleeves the outer sides of the first ends of the plurality of filter element columns and is propped against the first ends along the length direction; the rotating parts comprise the first rotating part and the second rotating part. The first rotating part and the second rotating part are rotationally installed at the two ends of the first retainer in the width direction respectively, so that the maximum distance between the first rotating part and the second rotating part in the width direction can be changed, and the maximum distance is the width of the filter element assembly. The rotating part is provided with a first hanging end. Wherein the first hanging end can be hung on the second hanging end of the shell when the maximum distance is increased, so that the rotating part at least applies acting force towards the second end to the first retainer. Compared with the prior art, the filter element assembly and the filter meet the requirements of narrow installation space adaptation, filtering effect guarantee, convenient operation and the like.

Description

Technical Field

[0001] This invention relates to the field of filters, for fluid filtration, especially air filtration, and more particularly to filter element assemblies and filters including such filter element assemblies. Background Technology

[0002] With the escalating global energy crisis and increasing environmental awareness, new energy vehicles have become the core trend in the development of the automotive industry. As an important sub-category of new energy vehicles, range-extended hybrid electric vehicles, with their advantages of electric drive as the primary mode and fuel supplementation, can meet users' long-range needs while also fulfilling the policy requirements for energy conservation and emission reduction. Therefore, they have been widely researched and promoted.

[0003] To accommodate the installation requirements of range-extended hybrid systems, the engine compartment needs to integrate numerous components, including the drive motor, generator, reducer, battery pack accessories, electronic control system, and traditional engine. This results in extremely compressed engine compartment space, significantly increasing the difficulty of layout. As a key component ensuring engine intake air cleanliness and extending engine life, the air filter, traditionally arranged in a drawer-style configuration, typically requires ample installation and maintenance space. This not only occupies additional engine compartment space but also imposes significant clearance requirements on surrounding components.

[0004] In the current compact engine compartment layout, the traditional design of filters and filter elements is no longer suitable for the narrow space: on the one hand, if the traditional layout is forced, it is easy to cause spatial interference with key components such as electric drive system and electronic control module, affecting the assembly accuracy of the whole vehicle, and even posing safety hazards such as component wear and wire compression; on the other hand, the traditional filter element installation method requires operators to leave enough operating space to complete disassembly and maintenance, while the compact engine compartment environment will lead to a significant increase in maintenance difficulty, reduce after-sales maintenance efficiency, and increase maintenance costs.

[0005] Therefore, the existing design schemes for filter arrangement and filter element installation can no longer meet the requirements of new energy vehicles such as range-extended hybrid vehicles for compact engine compartment layout. There is an urgent need to develop a filter element assembly and filter structure that is suitable for small engine compartment space and easy to install and maintain in order to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to overcome or mitigate the shortcomings of the prior art and to provide a filter element assembly and filter that is compact, easy to install, and reliable.

[0007] To achieve the above objectives, the present invention provides the following solution: This invention discloses a filter element assembly, comprising: The filter element columns are numerous and arranged side by side along their width; the two ends of the filter element columns along their length are the first end and the second end; A retainer is sleeved on the outside of the first end of the plurality of filter columns and abuts against the first end along the length direction; The rotating part includes a rotating part one and a rotating part two; the rotating part one and the rotating part two are respectively rotatably mounted on both ends of the retainer one along the width direction, so that the maximum distance between them along the width direction can be varied; the rotating part has a hook end one; Wherein, the first hook end can be hooked onto the second hook end of the housing when the maximum distance increases, so that the rotating part applies a force toward the second end to the first retainer.

[0008] In some examples, the rotational connection of the rotating part is a single-degree-of-freedom hinge.

[0009] In some examples, the rotation axis of the rotating part is arranged along the length direction.

[0010] In some examples, the filter assembly further includes a second retainer that is sleeved on the outside of the second end of the plurality of filter columns and abuts against the second end along its length.

[0011] The present invention also discloses a filter, including the above-described filter element assembly, and further including the housing; The housing has an inner cavity, which has an air inlet and an air outlet, and the filter element assembly is located in the inner cavity. The inner wall of the inner cavity at both ends along the width direction has the second hanging end; the second hanging end is hooked and connected to the first hanging end to apply a force along the length direction to the filter element assembly, so that the second end is sealed and connected to the air outlet, while the first end is connected to the air inlet.

[0012] In some examples, the housing also has an inner cavity two, which has an air vent two; the air vent one communicates with the inner cavity two.

[0013] In some examples, the housing includes a base, a first cover plate, and a second cover plate; the base and the first cover plate form an inner cavity 1, and the base and the second cover plate form an inner cavity 2; the base is fixedly connected to the first cover plate and the second cover plate respectively, and the base and the first cover plate are detachably fixedly connected.

[0014] In some examples, the base has a partition, the inner cavity one and the inner cavity two are separated by the partition, and the air vent one passes through the partition.

[0015] In some examples, the base and the cover are connected to a hanging ring via an elastic hook, and an elastic pressure is applied to press the cover against the base.

[0016] In some examples, the inner wall of the second cavity is provided with a flow guiding structure, which is used to guide fluid from the first vent to the second vent.

[0017] Compared with related technologies, the present invention achieves the following technical effects: By rotating the first rotating part and the second rotating part, the maximum distance between the first rotating part and the second rotating part in the width direction is shortened during the process of inserting the filter element assembly into the housing, so as to avoid the side wall of the housing; after the filter element assembly is inserted into the housing, the maximum distance between the first rotating part and the second rotating part in the width direction is increased, and the filter element assembly unfolds in the width direction, at which point the connection between the first hanging end and the second hanging end is completed.

[0018] Rotating parts one and two are rotatably mounted at both ends of the retainer one along its width. Their placement does not shorten the length of the filter cartridge column, but rather utilizes the redundant gaps at both ends of the housing's width. This design balances the needs of adapting to confined installation spaces, ensuring filtration efficiency, and facilitating operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the filter separation cover plate after some examples of the present invention; Figure 2 for Figure 1 A schematic diagram of the middle structure omitting cover plate one; Figure 3 for Figure 2 A schematic diagram of the section cut at position AA; Figure 4 for Figure 2 A magnified view of the central mounting point; Figure 5 for Figure 3 A schematic diagram showing the sealing connection between the middle retainer and the filter element column; Figure 6 This is a schematic diagram of a filter element assembly in some examples of the present invention; Figure 7 for Figure 6 A schematic diagram of the middle structure after the separation of the rotating part; Figure 8 for Figure 6 A partial right view of the middle filter element assembly when it is not unfolded; Figure 9 for Figure 6 A partial right view of the unfolded middle filter element assembly; Figure 10 This is a schematic diagram showing the relative positions of the first mounting end and the first rotating part; Figure 11 This is a schematic diagram of the filter element assembly when it is not deployed. Figure 12 This is a schematic diagram of the filter element assembly after it has been unfolded. Figure 13 for Figure 1 Another schematic diagram of the middle structure after omitting the cover plate; Figure 14 This is a schematic diagram of bracket one; Figure 15 A schematic diagram of support bracket two from one perspective; Figure 16 This is a schematic diagram from another perspective of bracket two; Figure 17 This is a schematic diagram of the base; Figure 18 A schematic diagram showing the filter from one perspective; Figure 19 This is a schematic diagram showing another perspective of the filter; Figure 20 This is a schematic diagram of an elastic hook.

[0021] In the diagram: 100-Filter element assembly; 200-Filter; 1-Filter element column; 2-Rotating part; 3-Cage one; 4-Cage two; 11-First end; 12-Second end; 21-Rotating part one; 22-Rotating part two; 23-Hanging end one; 41-Slot; 42-Cylinder; 5-Shell; 51-Inner cavity one; 52-Inner cavity two; 53-Base; 54-Cover plate one; 55-Cover plate two; 56-Partition; 511-Air inlet; 512-Air outlet one; 521-Air outlet two; 522-Flow guide structure; 531-Elastic hook; 532-Mounting position; 533-Hanging end two; 541-Hanging ring; 561-Seal. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The purpose of this invention is to overcome or mitigate the shortcomings of the prior art and to provide a filter element assembly and filter that is compact, easy to install, and reliable.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 The direction of media flow is shown; the media flows in the direction of the arrow in filter 200.

[0026] Figure 2 The cutting position AA is shown. Figure 2 The dotted box in the image indicates the area where the attachment point is located.

[0027] Figure 3 The distance M from the first end 11 of the filter element column 1 to the housing 5 is shown. Figure 3 The dashed box in the image represents the area where partition 56 is located.

[0028] Figure 4 The pin on base 53 is shown to be moving upward through the hook end 23.

[0029] Figure 5 A seal 561 between the retainer 2 4 and the partition 56 is shown, which is capable of achieving a circumferential seal.

[0030] Figure 6 The structure of the filter element column 1, retainer 1 3, retainer 2 4, and rotating part 2 after assembly is shown.

[0031] Figure 7 The installation method of rotating part 1 21 and rotating part 22 is shown. Both are slid into the corresponding incomplete circular holes in the direction of the arrow. During the sliding process, the incomplete circular holes elastically deform to avoid rotating part 1 21 or rotating part 22. After sliding in, rotating part 1 21 and rotating part 22 rely on their own shoulders to achieve axial limitation of the end face of the incomplete circular holes.

[0032] Figure 8 The image shows the rotating part 21 tilted upwards, at which point the width of the filter element assembly 100 is at its minimum value a. Figure 8 The dashed box in the middle indicates the area where the attachment point is located.

[0033] Figure 9 The image shows the rotating part 21 in a horizontal position, at which point the width of the filter element assembly 100 is at its maximum value b.

[0034] Figure 10 An example of a hook end 23 being a round hole is shown.

[0035] Figure 11Shows the state of the filter element assembly 100 when the width of the filter element assembly 100 is at the minimum value a.

[0036] Figure 12 Shows the state of the filter element assembly 100 when the width of the filter element assembly 100 is at the maximum value b.

[0037] Figure 13 Shows the length direction and width direction of the filter 200, Figure 13 The dotted box in which is the area where the hanging position is located.

[0038] Figure 14 Shows the structure of the first bracket. Figure 15 、 Figure 16 Shows the structure of the second bracket.

[0039] Figure 17 Shows the location of the first air outlet 512 of the first inner cavity 51. The first air outlet 512 is blocked in other drawings.

[0040] Figure 18 、 Figure 19 Respectively show two perspectives of the filter 200, Figure 18 The perspective of is obliquely downward, Figure 19 The perspective of is obliquely upward, Figure 19 The fixed mounting position 532 on the base � can be seen in, and this mounting position 532 is used for fixed connection at the corresponding mounting position 532 location, for example, using bolts to fix the mounting position 532 in the engine compartment.

[0041] Figure 20 Shows the structure of the elastic hook 531.

[0042] In this embodiment, the so-called multiple filter element columns 1 are arranged side by side, which means that the axes of the multiple filter element columns 1 are parallel to each other. The axes of the multiple parallel filter element columns 1 can be in the same plane to form a single-layer distribution, or can be not in the same plane to form a multi-layer distribution. When a multi-layer distribution is adopted, the multiple parallel filter element columns 1 can be distributed in a rectangular array, or the upper and lower two layers can be staggered (in a "pin" shape) to save space. The so-called length direction in this embodiment refers to the axis direction of the filter element column 1. The so-called width direction in this embodiment refers to the direction perpendicular to the axis of the filter element column 1 within the plane where the axes of the multiple filter element columns 1 are located.

[0043] Refer to Figures 1-20This embodiment provides a filter element assembly 100, including filter element columns 1, a retainer 3, and a rotating part 2. Multiple filter element columns 1 are arranged side-by-side along their width. The filter element columns 1 have a first end 11 and a second end 12 at their two ends along their length. The retainer 3 is sleeved on the outside of the first end 11 of the multiple filter element columns 1 and abuts against the first end 11 along its length. The rotating part 2 includes a first rotating part 21 and a second rotating part 22. The first rotating part 21 and the second rotating part 22 are rotatably mounted on the two ends of the retainer 3 along its width, allowing the maximum distance between them to vary along the width, which is the width of the filter element assembly 100. The rotating part 2 has a first hook end 23. When the maximum distance increases, the first hook end 23 hooks onto the second hook end 533 of the housing 5, causing the rotating part 2 to apply a force to the retainer 3 at least toward the second end 12.

[0044] The working principle of the filter element assembly 100 in this embodiment is as follows: Normally, if space allows, the filter element column 1 will be designed to be as long as possible in the length direction to achieve a better filtration effect.

[0045] The distance M from the first end 11 of the filter element column 1 to the housing 5 is the operating space. If the fixing structure is located on the side of the filter element column 1 away from the second end 12, and the length of the housing 5 is limited, the length of the filter element column 1 needs to be appropriately shortened to ensure the operating space. At this time, the filtration performance of the filter element assembly 100 decreases.

[0046] In this embodiment, rotating part 21 and rotating part 22 are rotatably mounted at both ends of the retainer 3 along the width direction. Their placement does not shorten the length of the filter element column 1, but rather utilizes the redundant gaps at both ends of the housing 5 in the width direction. The above design takes into account the requirements of adapting to narrow installation spaces, ensuring filtration effect, and convenient operation.

[0047] The retainer 3 simultaneously engages with the first ends 11 of multiple filter element columns 1, radially limiting the first ends 11 of the filter element columns 1 and maintaining their radial positions unchanged. The retainer 3 abuts against the first ends 11 of the filter element columns 1 along its length, allowing it to apply pressure along the length of the filter element columns 1, pressing the second ends 12 of the filter element columns 1 against the housing 5 in a contact or non-contact manner, thereby maintaining the longitudinal positions of the multiple filter element columns 1 unchanged.

[0048] Rotating part 1 21 and rotating part 22, by means of hooking, simultaneously limit the width direction and the length direction of retainer 1 3, so that the relative position of retainer 1 3 and housing 5 remains unchanged, thereby keeping the relative position of each filter element column 1 and housing 5 unchanged.

[0049] By rotating the first rotating part 21 and the second rotating part 22, the filter element assembly 100 is brought together in the width direction. During the process of the filter element assembly 100 being placed into the housing 5, the maximum distance between the first rotating part 21 and the second rotating part 22 in the width direction is shortened to avoid the side wall of the housing 5. After the filter element assembly 100 is placed into the housing 5, the maximum distance between the first rotating part 21 and the second rotating part 22 in the width direction is increased, and the filter element assembly 100 is unfolded in the width direction. At this time, the connection between the first hanging end 23 and the second hanging end 533 is completed.

[0050] Reference Figure 11 , Figure 12 When the filter element assembly 100 is unfolded in the width direction by the rotation of rotating part 1 21 and rotating part 22, the maximum distance between rotating part 1 21 and rotating part 22 in the width direction is b. When the filter element assembly 100 is contracted in the width direction by the rotation of rotating part 1 21 and rotating part 22, the maximum distance between rotating part 1 21 and rotating part 22 in the width direction is a. b is the maximum value of the maximum distance between rotating part 1 21 and rotating part 22 in the width direction, and a is the minimum value of the maximum distance between rotating part 1 21 and rotating part 22 in the width direction.

[0051] There are various types of connections that can be achieved between the first connection end 23 and the second connection end 533, such as the connection between a ring and a hook, the connection between a ring and a pin, and the connection between rings.

[0052] When choosing a ring-to-ring hooking scheme, at least one ring must be able to open and close, for example, by using a spring hook (or quick hook) commonly used in keychains, to enable quick hooking and unhooking.

[0053] When using a ring and pin connection scheme, the two are prone to separation due to the straight structure of the pin. Therefore, an anti-detachment design should be adopted. For example, the end of the pin can be screwed into a nut or abutted against the housing 5 to prevent the first connection end 23 from automatically detaching from the second connection end 533.

[0054] For example, refer to Figure 10 The first hanging end 23 is a through hole for hanging, that is, the first rotating part 21 and the second rotating part 22 participate in the hanging as a "ring".

[0055] In some examples, the rotational connection of the rotating part 2 is a single-degree-of-freedom hinge.

[0056] The single-degree-of-freedom hinge only allows the circumferential rotation of the attachment end 23, restricting the radial and axial displacement of the attachment end 23, which can provide a better limiting effect for the cage 3.

[0057] However, the actual implementation is not limited to this. For example, the rotating part 2 may also adopt other rotating connection methods such as ball joint connection.

[0058] In some examples, when the rotational connection of the rotating part 2 is a single-degree-of-freedom hinge, the rotation axis of the rotating part 2 is set along the length direction.

[0059] Depending on the actual needs, the rotation axis of the rotating part 2 can also be selected in other directions, such as forming an angle with the length direction.

[0060] In some examples, the filter assembly 100 also includes a second retainer 4, which is sleeved on the outside of the second end 12 of the plurality of filter columns 1 and abuts against the second end 12 along the length direction.

[0061] Similar to the function of retainer 3, retainer 4 can position the second end 12 of filter element column 1. When retainer 4 is fixed to housing 5, it can ensure that the relative position of filter element column 1 and housing 5 remains unchanged.

[0062] For example, refer to Figure 15 , Figure 16 The first side of the retainer 4 has a slot 41 for positioning the filter element column 1. This slot 41 is shaped to match the second end 12 of the filter element column 1, thus radially positioning the filter element column 1 after its second end 12 is inserted into the slot 41 (radial refers to the direction perpendicular to the axis of the filter element column 1). The second side of the retainer 4 has a cylindrical body 42, which extends into a corresponding hole on the housing 5 to achieve a shaft-hole fit, thereby radially positioning the retainer 4. Due to the structural design of the cylindrical body 42, the filter element assembly 100 needs to slide along its length so that the cylindrical body 42 slides into the corresponding hole. It is understood that the distance M from the first end 11 of the filter element column 1 to the housing 5 should not be less than the length of the cylindrical body 42.

[0063] Reference Figures 1-20 This embodiment also provides a filter 200, which includes the filter element assembly 100 described above, and also includes a housing 5.

[0064] The housing 5 has an inner cavity 51, which has an air inlet 511 and an air outlet 512, and the filter element assembly 100 is located in the inner cavity 51.

[0065] The inner walls at both ends of the inner cavity 51 along the width direction have two hanging ends 533. The two hanging ends 533 are connected to the first hanging end 23 to apply a force along the length direction to the filter element assembly 100, so that the second end 12 is sealed to the air outlet 512, and at the same time the first end 11 is connected to the air inlet 511.

[0066] The working principle of filter 200 in this embodiment is as follows: Fluid media such as water or gas enter the inner cavity 51 through the air inlet 511, and then flow to the first end 11 of the filter column 1. After being filtered by the filter column 1, they flow out from the second end 12 and leave the inner cavity 51 through the air outlet 512.

[0067] In some examples, the housing 5 also has an inner cavity 52, which has a second vent 521. The vent 512 communicates with the inner cavity 52.

[0068] In some examples, the housing 5 includes a base 53, a first cover 54, and a second cover 55. The base 53 and the first cover 54 form an inner cavity 51, and the base 53 and the second cover 55 form an inner cavity 52. ​​The base 53 is fixedly connected to the first cover 54 and the second cover 55 respectively, and the base 53 and the first cover 54 are detachably fixedly connected.

[0069] The base 53 and the cover plate 54 are detachably fixedly connected, facilitating the replacement of the filter element column 1 in the inner cavity 51. Since there are no parts to be replaced in the inner cavity 52, the base 53 and the cover plate 55 are preferably non-detachably fixedly connected to avoid affecting the sealing performance due to loose fasteners. Of course, a detachable fixed connection can also be chosen for the base 53 and the cover plate 55.

[0070] For example, the second mounting end 533 is a pin, the axis of which is perpendicular to the length and width directions. The lower end of the pin is fixedly connected to the upper end face of the base 53. This pin can be inserted into the corresponding hole of the first mounting end 23 after the filter element assembly 100 is unfolded in the width direction to achieve mounting.

[0071] In some examples, the base 53 has a partition 56, with inner cavity 51 and inner cavity 52 separated by the partition 56, and vent 512 passing through the partition 56.

[0072] The cylinder 42 on the second side of the retainer 4 mates with the shaft hole of the vent 512, and the end face of the second side of the retainer 4 abuts against the partition 56, thereby limiting the retainer 4 through the partition 56. The gap between the retainer 4 and the partition 56 can be sealed using a seal 561.

[0073] The media flowing out of multiple filter cartridges 1 converge inside the cylinder 42 and are then transported together to the second air outlet 521.

[0074] In some examples, refer to Figures 18-20 The base 53 and the cover plate 54 are connected to the hanging ring 541 by the elastic hook 531, and the elastic pressure is applied to make the cover plate 54 press against the base 53.

[0075] For example, the elastic hook 531 is rotatably mounted on the base 53 in a single-degree-of-freedom hinge manner. When the elastic hook 531 rotates to a certain angle, its end is elastically bent so that the end of the elastic hook 531 passes through the hanging ring 541, and then the elastic hook 531 is reset. The elastic hook 531 uses its own elasticity to provide elastic pressure that brings the base 53 and the cover plate 54 closer to each other.

[0076] It should be noted that due to the flow resistance provided by the filter element column 1, there is a certain pressure in the inner cavity 51. Applying pre-pressure through the above-mentioned elastic locking method can improve the sealing performance at the contact point between the base 53 and the cover plate 54.

[0077] In some examples, the inner wall of the second cavity 52 is provided with a flow guiding structure 522, which is used to guide the fluid from the first vent 512 to the second vent 521.

[0078] For example, the flow guiding structure 522 may be a flow guiding groove or a partial protrusion, used to allow the medium to flow rapidly to the second vent 521.

[0079] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A filter element assembly, characterized in that, include: The filter element columns are numerous and arranged side by side along their width; the two ends of the filter element columns along their length are the first end and the second end; A retainer is sleeved on the outside of the first end of the plurality of filter columns and abuts against the first end along the length direction; The rotating part includes a rotating part one and a rotating part two; the rotating part one and the rotating part two are respectively rotatably mounted on both ends of the retainer one along the width direction, so that the maximum distance between them along the width direction can be varied; the rotating part has a hook end one; Wherein, the first hook end can be hooked onto the second hook end of the housing when the maximum distance increases, so that the rotating part applies a force toward the second end to the first retainer.

2. The filter element assembly according to claim 1, characterized in that: The rotating part is connected by a single-degree-of-freedom hinge.

3. The filter element assembly according to claim 2, characterized in that: The rotation axis of the rotating part is set along the length direction.

4. The filter element assembly according to claim 1, characterized in that: It also includes a second retainer, which is sleeved on the outside of the second end of the plurality of filter columns and abuts against the second end along the length direction.

5. A filter, characterized in that: Includes the filter element assembly as described in any one of claims 1 to 4, and further includes the housing; The housing has an inner cavity, which has an air inlet and an air outlet, and the filter element assembly is located in the inner cavity. The inner wall of the inner cavity at both ends along the width direction has the second hanging end; the second hanging end is hooked and connected to the first hanging end to apply a force along the length direction to the filter element assembly, so that the second end is sealed and connected to the air outlet, while the first end is connected to the air inlet.

6. The filter according to claim 5, characterized in that: The housing also has an inner cavity two, and the inner cavity two has an air outlet two; the air outlet one communicates with the inner cavity two.

7. The filter according to claim 5, characterized in that: The housing includes a base, a cover plate one, and a cover plate two; the base and the cover plate one form an inner cavity one, and the base and the cover plate two form an inner cavity two; the base is fixedly connected to the cover plate one and the cover plate two respectively, and the base and the cover plate one are detachably fixedly connected.

8. The filter according to claim 7, characterized in that: The base has a partition, and the inner cavity one and the inner cavity two are separated by the partition. The air outlet one passes through the partition.

9. The filter according to claim 7, characterized in that: The base and the cover plate are connected to the hanging ring via an elastic hook, and an elastic pressure is applied to press the cover plate against the base.

10. The filter according to claim 6, characterized in that: The inner wall of the second inner cavity is provided with a flow guiding structure, which is used to guide the fluid from the first air outlet to the second air outlet.

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