Sterile filter

Abstract

The application relates to the filter technical field and provides a sterilization filter, which comprises a shell, the shell comprises a base part and a main body part, the base part and the main body part are detachably connected together to form a containing cavity; a filter core assembly is arranged in the containing cavity, the filter core assembly comprises a bearing part and a filter core main body, the filter core main body is arranged on the bearing part, the filter core main body is pressed on the bearing part through the main body part to form a filtering cavity between the filter core main body and the bearing part; an air inlet pipe and an air outlet pipe are connected to the base part, the air inlet pipe penetrates through the base part and communicates with the containing cavity, the air outlet pipe penetrates through the base part and the bearing part and communicates with the filtering cavity. The filter core main body is arranged on the bearing part through the main body part, and the base part and the main body part are detachably connected together, so that the shell can be conveniently disassembled, the filter core main body can be conveniently replaced or cleaned, and the cleaning convenience of the sterilization filter is improved.

Description

Technical Field

[0001] This application relates to the field of filter technology, and in particular to a sterilization filter. Background Technology

[0002] In the pharmaceutical industry, sterilization filters are crucial devices for the final purification of process gases. They primarily use high-precision filter elements to intercept and filter microorganisms and impurities in process gases, achieving sterilization. However, with prolonged use, dust and other impurities can accumulate inside sterilization filters, affecting gas delivery efficiency and potentially compromising the sterile environment. Furthermore, most existing sterilization filters are closed, integrated structures, making disassembly and assembly difficult and hindering ease of cleaning. Summary of the Invention

[0003] In view of this, this application aims to provide a sterilization filter to improve the ease of cleaning the sterilization filter.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows: A sterilization filter includes a housing, the housing comprising a base portion and a main body portion, the base portion and the main body portion being detachably connected together to form a receiving cavity; a filter element assembly is disposed within the receiving cavity, the filter element assembly comprising a supporting portion and a filter element body, the filter element body being disposed on the supporting portion, and the filter element body being pressed onto the supporting portion by the main body portion to form a filtration cavity between the filter element body and the supporting portion; An air inlet pipe and an air outlet pipe are connected to the base portion. The air inlet pipe passes through the base portion and communicates with the receiving cavity. The air outlet pipe passes through the base portion and the supporting portion and communicates with the filter cavity.

[0005] Furthermore, the supporting part has a slot so that the open end of the supporting part has a support platform; the open end of the filter element body has an insertion part, which is inserted into the slot; the end face of the insertion part abuts against the support platform, and a sealing element is provided between the insertion part and the slot, which is arranged circumferentially along the insertion part.

[0006] Furthermore, the sealing element includes a plurality of sealing rings, which are sleeved on the outside of the insert portion, and the plurality of sealing rings are spaced apart along the axial direction of the insert portion.

[0007] Furthermore, the insert portion has a groove circumferentially provided, and part of the sealing ring is embedded in the groove.

[0008] Furthermore, a connector is provided between the base portion and the main body portion; the connector includes a first flange fixedly connected to the base portion, a second flange fixedly connected to the main body portion, and a threaded component passing through the first flange and the second flange, the threaded component being detachably connected between the first flange and the second flange.

[0009] Furthermore, a primary filter is provided between the supporting part and the base part; the primary filter extends circumferentially along the supporting part and is connected to the inner wall of the base part to form a primary filter cavity between the primary filter, the supporting part and the base part, and the air intake pipe is connected to the primary filter cavity.

[0010] Furthermore, the primary filter element includes a support plate, an adsorption filter layer, and a limiting plate. Both the support plate and the limiting plate have multiple through holes. The support plate is fixed between the support portion and the base portion. The adsorption filter layer is placed on the support plate, and the limiting plate is pressed onto the adsorption filter layer. The second flange has an extension portion that extends radially inward, and the extension portion can abut against the top of the limiting plate.

[0011] Furthermore, the base portion is connected to a drain valve; the drain valve is connected to the center of the bottom of the base portion, and the drain valve can connect or isolate the receiving cavity from the outside.

[0012] Furthermore, it also includes a purging assembly that can supply cleaning gas, allowing the cleaning gas to flow from the filter chamber into the receiving chamber and be discharged through the drain valve.

[0013] Furthermore, the purging assembly includes a shut-off valve and an inlet valve; the shut-off valve is connected to the inlet pipe and the outlet pipe respectively, so as to control the opening and closing of the inlet pipe and the outlet pipe respectively; the inlet valve is connected to the outlet pipe and can communicate with the filter chamber.

[0014] Compared with related technologies, this application has the following advantages: (1) The sterilizing filter described in this application, by setting the filter element body to be pressed onto the support part through the main body portion and by setting the base part to be detachably connected to the main body portion, facilitates the disassembly and assembly of the outer shell, thereby facilitating the replacement or cleaning of the filter element body and improving the cleaning convenience of the sterilizing filter. At the same time, by setting the filter element body to be pressed onto the support part through the main body portion, on the one hand, it can effectively ensure the stability of the filter element assembly, and on the other hand, when the main body portion is removed, it can facilitate the separation of the filter element body from the support part, thereby further improving the cleaning convenience of the sterilizing filter.

[0015] (2) By setting a slot on the bearing part and making the filter element body have an insertion part, the filter element body can be quickly positioned and installed, and the radial displacement of the filter element body can be effectively limited. At the same time, by setting a seal between the insertion part and the slot, the assembly gap between the insertion part and the slot can be sealed, preventing unsterilized gas from directly passing into the filter chamber, thereby improving the sterilization filtration reliability of the sterilization filter.

[0016] (3) By setting the sealing element to include multiple sealing rings arranged axially along the insert portion, multiple isolation seals can be formed between the insert portion and the bearing portion, which is beneficial to ensuring the sealing performance of the sealing element and further ensuring the reliability of the sterilization filter.

[0017] (4) By setting a groove and embedding part of the sealing ring in the groove, the sealing ring can be effectively prevented from moving along the axial direction of the insertion part, and the sealing ring can be effectively prevented from moving during the disassembly and assembly of the filter element body, thus ensuring the reliability of the multiple seals of the sealing element.

[0018] (5) By setting the connecting parts including the first flange, the second flange and the threaded parts, the base part and the main body part can be detachably locked and fixed. At the same time, it can also facilitate the design and implementation of the connecting parts.

[0019] (6) By setting a circumferentially arranged primary filter between the bearing part and the base part to form a primary filter chamber connected to the air intake pipe, the intake air can pass through the primary filter to intercept large particulate impurities in advance, which helps to reduce the burden on the main body of the rear filter element.

[0020] (7) By providing a radially inwardly extending extension portion on the second flange, the extension portion presses down against the limiting plate when the outer shell is locked, and the primary filter element can be pressed with the locking force of the outer shell flange. The primary filter element can be positioned and fixed without additional fasteners, which simplifies the internal assembly structure. At the same time, setting the limiting plate on the adsorption filter layer also facilitates the replacement of the adsorption filter layer.

[0021] (8) By setting a drain valve in the base part, the impurities in the containment cavity can be discharged by controlling the opening and closing of the drain valve, thus avoiding the accumulation of impurities.

[0022] (9) By setting up a purging assembly, the cleaning gas can flow from the filter chamber to the receiving chamber. At the same time, with the drain valve, it can achieve reverse flushing of the filter element assembly and the inner wall surface of the outer shell to intercept impurities, thereby reducing the accumulation of impurities and reducing the frequency of disassembly and cleaning.

[0023] (10) By installing shut-off valves on the inlet pipe and outlet pipe respectively, the shut-off valves can control the opening and closing of the two pipes, enabling the sterilization filter to switch between normal filtration and purging cleaning conditions. At the same time, by setting an inlet valve on the outlet pipe as a clean gas inlet, clean gas can enter the filter chamber and back purge and clean impurities. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the sterilization filter described in the embodiment of this application; Figure 2 for Figure 1 A magnified view of part A in the middle; Figure 3 for Figure 1 A magnified view of part B in the middle section; Explanation of reference numerals in the attached figures: 1. Outer shell; 2. Filter element assembly; 3. Inlet pipe; 4. Outlet pipe; 5. Seal; 6. Connector; 7. Pre-filter; 8. Purge assembly; 101. Base; 101a. Drain valve; 102. Main body; 1a. Receiving cavity; 201. Bearing part; 201a. Slot; 201b. Support platform; 202. Filter element body; 2021. Insertion part; 2021a. Embedded groove; 2a. Filter cavity; 501. Sealing ring; 601. First flange; 602. Second flange; 6021. Extension part; 603. Threaded part; 701. Bearing plate; 702. Adsorption filter layer; 703. Limiting plate; 7a. Primary filter cavity; 801. Shut-off valve; 802. Inlet valve. Detailed Implementation

[0025] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0027] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0029] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0031] An embodiment of the first aspect of this application provides a sterilization filter capable of sterilizing and purifying gas, and the sterilization filter, through innovative design, also improves the ease of cleaning.

[0032] In related technologies, after prolonged use, dust and impurities in the gas will remain inside the sterilization filter, affecting gas delivery efficiency and potentially impacting the sterile environment. Existing sterilization filters are mostly closed, integrated structures, which makes disassembly and assembly difficult and hinders the improvement of cleaning convenience.

[0033] In view of this, in order to overcome the shortcomings of related technologies, the sterilization filter in this embodiment combines... Figures 1 to 3As shown, the overall design includes a housing 1, which includes a base portion 101 and a main body portion 102. The base portion 101 and the main body portion 102 are detachably connected together to form a receiving cavity 1a.

[0034] The cavity 1a contains a filter element assembly 2, which includes a support portion 201 and a filter element body 202. The filter element body 202 is disposed on the support portion 201 and is pressed onto the support portion 201 by the body portion 102, so as to form a filter cavity 2a between the filter element body 202 and the support portion 201. Furthermore, the base portion 101 is connected to an air inlet pipe 3 and an air outlet pipe 4. The air inlet pipe 3 passes through the base portion 101 and communicates with the receiving cavity 1a, while the air outlet pipe 4 passes through the base portion 101 and the supporting portion 201 and communicates with the filter cavity 2a.

[0035] Therefore, by setting the filter element body 202 to be pressed onto the support portion 201 via the main body portion 102, and by setting the base portion 101 to be detachably connected to the main body portion 102, the outer casing 1 can be easily disassembled and assembled, thereby facilitating the replacement or cleaning of the filter element body 202 and improving the cleaning convenience of the sterilization filter. At the same time, by setting the filter element body 202 to be pressed onto the support portion 201 via the main body portion 102, on the one hand, the stability of the filter element assembly 2 can be effectively ensured; on the other hand, when the main body portion 102 is removed, it is easy to separate the filter element body 202 from the support portion 201, thereby further improving the cleaning convenience of the sterilization filter.

[0036] Based on the above overview, it is worth noting that, in specific implementations, as an optional embodiment of the outer shell 1 and the supporting portion 201, in this embodiment, for example, the outer shell 1 and the supporting portion 201 are made of stainless steel. This design allows the shell to withstand a certain amount of pressure. Furthermore, it is preferable that the outer shell 1 and the supporting portion 201 have smooth surfaces to reduce the adhesion of impurities. It is also worth noting that, as an optional embodiment of the filter element body 202, in this embodiment, the filter element body 202 can be made of existing materials to achieve the filtration of impurities.

[0037] Based on this, the air inlet pipe 3 and the air outlet pipe 4 are made of the same material as the outer shell 1. The air outlet pipe 4 is connected to the filter chamber 2a, while the air inlet pipe 3 is connected to the base part 101 and the supporting part 201, so that the filter element assembly 2 can be spaced between the inner wall of the outer shell 1, which facilitates the flow of gas.

[0038] In some of the exemplary implementations, combined with Figure 1 and Figure 2As shown, the support portion 201 has a slot 201a so that the open end of the support portion 201 has a support platform 201b; the open end of the filter element body 202 has an insertion portion 2021, which is inserted into the slot 201a.

[0039] The end face of the insert portion 2021 abuts against the support 201b, and a sealing element 5 is provided between the insert portion 2021 and the slot 201a. The sealing element 5 is arranged circumferentially along the insert portion 2021.

[0040] Therefore, by providing a slot 201a on the supporting part 201 and giving the filter element body 202 an insertion part 2021, the filter element body 202 can be quickly positioned and installed, and the radial displacement of the filter element body 202 can be effectively limited. Simultaneously, by providing a seal 5 between the insertion part 2021 and the slot 201a, the assembly gap between the insertion part 2021 and the slot 201a can be sealed, preventing unsterilized gas from directly entering the filter chamber 2a, thereby improving the sterilization filtration reliability of the sterilization filter.

[0041] In detail, as an optional implementation of the seal 5, in this embodiment, combined with Figure 1 and Figure 2 As shown, for example, the sealing element 5 may include a plurality of sealing rings 501, which are sleeved on the outside of the insert portion 2021, and the plurality of sealing rings 501 are distributed at intervals along the axial direction of the insert portion 2021.

[0042] Therefore, by providing the sealing element 5 with multiple sealing rings 501 arranged axially spaced along the insert portion 2021, multiple isolation seals can be formed between the insert portion 2021 and the bearing portion 201, which helps to ensure the sealing performance of the sealing element 5 and further helps to ensure the reliability of the sterilization filter.

[0043] It is worth noting that, in specific implementation, in order for the sealing ring 501 to seal the sealing gap between the insert portion 2021 and the supporting portion 201, in this embodiment, the sealing ring 501 is preferably set as a rubber ring, so that the sealing ring 501 can deform and seal between the insert portion 2021 and the supporting portion 201. Of course, it is also possible to set the sealing ring 501 to be made of other materials to effectively ensure the sealing performance between the insert portion 2021 and the supporting portion 201.

[0044] Based on the provision of the sealing element 5 including the sealing ring 501, in order to further improve the reliability of the sealing ring 501 on the insertion portion 2021, in some exemplary embodiments, combined with Figure 2As shown, the insert portion 2021 has a groove 2021a circumferentially provided, and part of the sealing ring 501 is embedded in the groove 2021a.

[0045] Therefore, by setting the groove 2021a and embedding part of the sealing ring 501 in the groove 2021a, the movement of the sealing ring 501 along the axial direction of the insertion part 2021 can be effectively prevented, and the movement of the sealing ring 501 during the disassembly and assembly of the filter element body 202 can be effectively prevented, thus ensuring the reliability of the multiple seals of the sealing element 5.

[0046] In some of the exemplary implementations, combined with Figure 1 As shown, a connector 6 is provided between the base portion 101 and the main body portion 102.

[0047] In detail, the connector 6 includes a first flange 601 fixedly connected to the base portion 101, a second flange 602 fixedly connected to the main body portion 102, and a threaded component 603 passing through the first flange 601 and the second flange 602. The threaded component 603 is detachably connected between the first flange 601 and the second flange 602.

[0048] Therefore, by setting the connector 6, which includes a first flange 601, a second flange 602, and a threaded part 603, the base part 101 and the main body part 102 can be detachably locked and fixed. At the same time, it also facilitates the design and implementation of the connector 6.

[0049] It is worth noting that, in specific implementation, the specific configuration of the first flange 601 and the second flange 602 should refer to relevant technologies to ensure the sealing performance of the housing. Meanwhile, as an optional implementation of the threaded component 603, in this embodiment, the threaded component 603 can be, for example, a bolt and nut assembly. This is achieved by having one end of the bolt pass through the first flange 601 and the second flange 602, clamping the first flange 601 and the second flange 602 between the bolt's nut and bolt. Of course, it is also feasible to use other forms of the threaded component 603 to achieve the connection between the first flange 601 and the second flange 602.

[0050] In some of the exemplary implementations, combined with Figure 1 and Figure 3 As shown, a primary filter element 7 is provided between the supporting part 201 and the base part 101.

[0051] The primary filter element 7 extends circumferentially along the supporting portion 201 and is connected to the inner wall of the base portion 101 to form a primary filter cavity 7a between the primary filter element 7, the supporting portion 201 and the base portion 101, and the air intake pipe 3 is connected to the primary filter cavity 7a.

[0052] Therefore, by setting a circumferentially arranged primary filter element 7 between the bearing part 201 and the base part 101 to form a primary filter chamber 7a connected to the air intake pipe 3, the intake air can pass through the primary filter element 7 to pre-intercept large particulate impurities, which helps to reduce the burden on the rear filter element body 202.

[0053] In detail, as an optional embodiment of the pre-filter 7, in some exemplary embodiments, the pre-filter 7 includes a support plate 701, an adsorption filter layer 702, and a limiting plate 703, both of which have multiple through holes. The support plate 701 is fixedly connected between the support portion 201 and the base portion 101, the adsorption filter layer 702 is placed on the support plate 701, and the limiting plate 703 is pressed onto the adsorption filter layer 702.

[0054] The second flange 602 has an extension portion 6021 that extends radially inward and can abut against the upper part of the limiting plate 703.

[0055] Therefore, by providing a radially inwardly extending extension portion 6021 on the second flange 602, when the outer casing 1 is locked, the extension portion 6021 presses down against the limiting plate 703, and the primary filter element 7 can be pressed tightly by the locking force of the flange of the outer casing 1. The positioning and fixing of the primary filter element 7 can be completed without additional fasteners, which simplifies the internal assembly structure. At the same time, the setting of the limiting plate 703 on the adsorption filter layer 702 also facilitates the replacement of the adsorption filter layer 702.

[0056] Based on the above overview, it is worth noting that, as an optional implementation of the adsorption filter layer 702, in this embodiment, for example, the adsorption filter layer 702 can be made of activated carbon, so as to utilize the adsorption characteristics of activated carbon to adsorb impurities in the gas.

[0057] In some of the exemplary implementations, combined with Figure 1 As shown, the base portion 101 is connected to a drain valve 101a; the drain valve 101a is connected to the center of the bottom of the base portion 101, and the drain valve 101a can connect or isolate the receiving cavity 1a from the outside.

[0058] Therefore, by providing a drain valve 101a in the base portion 101, impurities in the receiving cavity 1a can be discharged by controlling the opening and closing of the drain valve 101a, thereby avoiding the accumulation of impurities.

[0059] Based on the above general overview, in some of the exemplary implementations, combined with Figure 1 As shown, the sterilization filter also includes a purging assembly 8, which can supply clean gas so that the clean gas can flow from the filter chamber 2a into the receiving chamber 1a and be discharged through the drain valve 101a.

[0060] Therefore, by setting up the purging assembly 8, the cleaning gas can flow from the filter chamber 2a to the receiving chamber 1a. At the same time, in conjunction with the drain valve 101a, it can achieve reverse flushing of the filter element assembly 2 and the inner wall surface of the outer shell 1 to intercept impurities, thereby reducing the accumulation of residual impurities and reducing the frequency of disassembly and cleaning.

[0061] In detail, as an optional implementation of the purging assembly 8, in this embodiment, the purging assembly 8 may be configured to include a shut-off valve 801 and an intake valve 802.

[0062] Among them, the shut-off valve 801 is connected to the air inlet pipe 3 and the air outlet pipe 4 respectively, so as to control the opening and closing of the air inlet pipe 3 and the air outlet pipe 4 respectively; the air inlet valve 802 is connected to the air outlet pipe 4 and can be connected to the filter chamber 2a.

[0063] Therefore, by installing shut-off valves 801 on the inlet pipe 3 and the outlet pipe 4 respectively, the shut-off valves 801 can control the opening and closing of the two pipes, enabling the sterilization filter to switch between normal filtration and purging cleaning conditions. At the same time, by setting an inlet valve 802 on the outlet pipe 4 as a clean gas inlet, clean gas can enter the filter chamber 2a and back purge and clean impurities.

[0064] Based on the above overview, it is worth noting that in specific implementation, the drain valve 101a, shut-off valve 801, and air inlet valve 802 can be configured according to relevant technical specifications. This ensures that the shut-off valve 801 can control the opening and closing of the air inlet pipe 3 and the air outlet pipe 4 respectively; that the air inlet valve 802, when open, allows clean gas to enter the filter chamber 2a through the air outlet pipe 4, and when closed, ensures the airtightness of the air outlet pipe 4; and that the drain valve 101a, when open, discharges impurities, and when closed, maintains the sealing of the receiving chamber 1a.

[0065] The sterilizing filter of this embodiment adopts the above design. The filter element body 202 is pressed onto the support portion 201 by the main body portion 102, and the base portion 101 is detachably connected to the main body portion 102. This facilitates the disassembly and assembly of the outer casing 1, making it easier to replace or clean the filter element body 202 and thus improving the cleaning convenience of the sterilizing filter. Simultaneously, by pressing the filter element body 202 onto the support portion 201 by the main body portion 102, the stability of the filter element assembly 2 can be effectively ensured. Furthermore, when the main body portion 102 is removed, it facilitates the separation of the filter element body 202 from the support portion 201, further enhancing the cleaning convenience of the sterilizing filter.

[0066] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A sterilization filter, characterized in that: Includes an outer shell (1), the outer shell (1) including a base portion (101) and a main body portion (102), the base portion (101) and the main body portion (102) being detachably connected together to form a receiving cavity (1a); The receiving cavity (1a) is provided with a filter element assembly (2), the filter element assembly (2) includes a supporting part (201) and a filter element body (202), the filter element body (202) is disposed on the supporting part (201), and the filter element body (202) is pressed on the supporting part (201) by the main body part (102) to form a filter cavity (2a) between the filter element body (202) and the supporting part (201); An air inlet pipe (3) and an air outlet pipe (4) are connected to the base part (101). The air inlet pipe (3) passes through the base part (101) and communicates with the receiving cavity (1a). The air outlet pipe (4) passes through the base part (101) and the supporting part (201) and communicates with the filter cavity (2a).

2. The sterilizing filter according to claim 1, characterized in that: The supporting part (201) has a slot (201a) so that the open end of the supporting part (201) has a support (201b); the open end of the filter element body (202) has an insertion part (2021), and the insertion part (2021) is inserted into the slot (201a); The end face of the insert portion (2021) abuts against the support (201b), and a sealing element (5) is provided between the insert portion (2021) and the slot (201a), and the sealing element (5) is arranged circumferentially along the insert portion (2021).

3. The sterilization filter according to claim 2, characterized in that: The sealing element (5) includes a plurality of sealing rings (501), which are sleeved on the outside of the insert portion (2021), and the plurality of sealing rings (501) are spaced apart along the axial direction of the insert portion (2021).

4. The sterilizing filter according to claim 3, characterized in that: The insert portion (2021) has a groove (2021a) circumferentially provided, and part of the sealing ring (501) is embedded in the groove (2021a).

5. The sterilizing filter according to claim 1, characterized in that: A connector (6) is provided between the base portion (101) and the main body portion (102); The connector (6) includes a first flange (601) fixedly connected to the base portion (101), a second flange (602) fixedly connected to the main body portion (102), and a threaded component (603) passing through the first flange (601) and the second flange (602), the threaded component (603) being detachably connected between the first flange (601) and the second flange (602).

6. The sterilizing filter according to claim 5, characterized in that: A primary filter element (7) is provided between the supporting part (201) and the base part (101); The primary filter element (7) extends circumferentially along the supporting portion (201) and is connected to the inner wall of the base portion (101) to form a primary filter cavity (7a) between the primary filter element (7), the supporting portion (201) and the base portion (101), and the air inlet pipe (3) communicates with the primary filter cavity (7a).

7. The sterilizing filter according to claim 6, characterized in that: The primary filter element (7) includes a support plate (701), an adsorption filter layer (702), and a limiting plate (703). Both the support plate (701) and the limiting plate (703) have multiple through holes. The support plate (701) is fixed between the support part (201) and the base part (101), the adsorption filter layer (702) is placed on the support plate (701), and the limiting plate (703) is pressed on the adsorption filter layer (702). The second flange (602) has an extension (6021) extending radially inward, the extension (6021) being able to abut against the limiting plate (703).

8. The sterilizing filter according to claim 1, characterized in that: The base portion (101) is connected to a drain valve (101a); The drain valve (101a) is connected to the center of the bottom of the base portion (101), and the drain valve (101a) enables the receiving cavity (1a) to communicate with or be isolated from the outside.

9. The sterilizing filter according to claim 8, characterized in that: It also includes a purging assembly (8) that can supply cleaning gas so that the cleaning gas can flow from the filter chamber (2a) into the receiving chamber (1a) and be discharged through the drain valve (101a).

10. The sterilizing filter according to claim 9, characterized in that: The purging assembly (8) includes a shut-off valve (801) and an intake valve (802); The shut-off valve (801) is connected to the air inlet pipe (3) and the air outlet pipe (4) respectively, so as to control the opening and closing of the air inlet pipe (3) and the air outlet pipe (4) respectively; the air inlet valve (802) is connected to the air outlet pipe (4) and can be connected to the filter chamber (2a).

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