Air filter and vacuum pump with same

Abstract

The invention relates to the technical field of filtering equipment, in particular to an air filter and a vacuum pump with the same. The air filter comprises a fixed shell, a filter element assembly, a quick-release upper cover, a quick-locking assembly and an unlocking circular ring, the fixed shell comprises a hollow cylinder, an air inlet side pipe, an air outlet lower pipe, an annular convex edge and a guide lock groove; the filter element assembly comprises a bottom circular ring, a top circular ring, an inner filter ring, a middle filter ring and an outer filter ring; the quick-release upper cover comprises an upper cover body, an upper cover circular cavity, an upper annular groove, a contact disc and a lower annular groove. The quick lock assembly slides into the corresponding guide lock groove to lock the quick release upper cover; the unlocking ring comprises an unlocking ring body, an unlocking ring groove and an active inclined face. According to the air filter provided by the invention, layer-by-layer filtration from coarse to fine can be realized through the three layers of filter rings of the filter element assembly; the filter element assembly and the quick-release upper cover can be conveniently detached. The utility model further discloses a vacuum pump with the air filter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filtering equipment, in particular to an air filter and a vacuum pump with the same. BACKGROUND

[0002] The air inlet of the vacuum pump needs to be installed with an air filter, and its core mission is to prevent solid particles, dust and other pollutants in the air from entering the pump cavity. When the vacuum pump is pumping, the outside air is sucked into the filter. The air passes through the filter medium, and the particulate pollutants therein are blocked outside or inside the filter material, and the clean air enters the pump.

[0003] The air filter of the prior art has the following problems: 1. Disassembly and assembly are not convenient. In order to ensure the sealing effect, a plurality of bolt assemblies need to be tightened, and the installation and disassembly are not convenient.

[0004] 2. The filter screen is blocked. The filter screen of the prior art is not provided with hierarchical distribution, and the single filter screen structure is easily blocked by large particles, causing rapid attenuation of the filtering effect. SUMMARY

[0005] An air filter, comprising a fixed shell, a filter element assembly, a quick-release upper cover, a quick-lock assembly, and an unlocking ring. The fixed shell comprises a hollow cylinder with an upper opening, an air inlet side pipe formed on the side surface of the hollow cylinder, an air outlet lower pipe formed on the bottom surface of the hollow cylinder, an annular convex edge formed on the inner wall of the hollow cylinder, and guide lock grooves uniformly distributed in the circumferential direction on the outer wall of the annular convex edge. The guide lock grooves comprise an inclined sliding groove provided on the outer wall of the annular convex edge, an import vertical groove provided on the upper end of the inclined sliding groove, and an arc-shaped flat groove provided on the lower end of the inclined sliding groove. The middle part and the end of the bottom surface of the arc-shaped flat groove are respectively provided with a first lock groove and a second lock groove. The bottom of the hollow cylinder is further provided with a middle circular pipe in communication with the air outlet lower pipe, and the middle circular pipe is provided with a breathable side hole. The fixed shell further comprises driving inclined blocks uniformly distributed on the bottom surface of the hollow cylinder. The horizontal projection of the driving inclined blocks is arc-shaped, and the driving inclined blocks gradually increase in the counterclockwise direction.

[0006] The filter element assembly comprises a bottom ring and a top ring, and coaxially distributed inner, middle and outer filter rings are arranged between the bottom ring and the top ring. The filter element assembly further comprises a filter element lock ring arranged on the top ring. The filter element assembly further comprises a receiving ring groove arranged on the inner side of the bottom ring lower end surface to accommodate the driving inclined blocks, and follower inclined blocks uniformly distributed in the circumferential direction in the receiving ring groove and matched with the driving inclined blocks. The quick release upper cover comprises an upper cover body with an open lower end, an upper cover circular cavity provided on the lower end surface of the circular top cover of the upper cover body, an upper ring groove provided in the upper cover circular cavity, a rotatable contact disc provided in the upper cover circular cavity, a lower ring groove provided on the upper end surface of the contact disc and corresponding to the upper ring groove, a sealing circular ring provided on the lower end surface of the contact disc, the sealing circular ring being in sealing contact with the upper edge of the hollow cylindrical body, and spherical balls being provided in the upper ring groove and the lower ring groove; an upper cover ring groove is provided on the outer edge of the circumferential side wall of the upper cover body; a transmission column is provided in the middle of the lower end surface of the upper cover circular cavity, and a lock column through hole is provided in the middle of the contact disc and matched with the transmission column.

[0007] The quick lock assembly is arranged on the upper cover body, the quick lock assembly corresponds to the guide lock groove, the quick lock assembly is slid into the corresponding guide lock groove to realize the locking of the quick release upper cover, and the quick lock assembly at least comprises a quick lock base arranged on the inner side of the circumferential side wall of the upper cover body; the quick lock assembly further comprises a quick lock longitudinal hole arranged below the quick lock base, a guide circular shaft arranged on the upper end of the quick lock longitudinal hole, a side-arranged through hole arranged on the outer side of the quick lock longitudinal hole and in communication with the upper cover ring groove, a locking sliding sleeve slidably sleeved on the guide circular shaft, a return compression spring arranged in the locking sliding sleeve, a pressure receiving push rod arranged on the outer side of the locking sliding sleeve and passing through the side-arranged through hole, and a pressure receiving inclined surface formed on the lower end surface of the pressure receiving push rod. The unlocking circular ring comprises a rotatable unlocking ring body arranged in the upper cover ring groove, an unlocking ring groove arranged in the unlocking ring body and containing the pressure receiving push rod, and a driving inclined surface circumferentially and uniformly arranged in the unlocking ring groove and matched with the pressure receiving inclined surface.

[0008] The air filter further comprises a control assembly for controlling the rotation freedom of the locking and unlocking filter element assembly; The control assembly comprises a control base, a driving rotor and a driven lock rod; The control base comprises an end cylindrical body arranged on the upper end of the middle circular pipe, a small-diameter opening arranged on the upper end of the end cylindrical body, and a large-diameter circular cavity arranged below the small-diameter opening, and two parallel flat lock holes are arranged below the large-diameter circular cavity and in communication; The driving rotor comprises a limiting disc rotatably arranged in the large-diameter circular cavity, a driving arc groove arranged on the lower end surface of the limiting disc, and a lower transmission column arranged on the upper end of the limiting disc and passing through the small-diameter opening, the lower transmission column being in transmission connection with the upper transmission column, and the driving arc groove being provided with two arc grooves and being centrally and symmetrically distributed; The driven lock rod corresponds to the driving arc groove, and the driven lock rod comprises a lock rod body slidably arranged in the flat lock hole, and a lock rod plug arranged on the upper end of the lock rod body and in one-to-one plug-in connection with the driving arc groove.

[0009] As a further embodiment: The driving arc groove comprises a first arc groove and a second arc groove; The first arc groove is a circular arc groove coaxially arranged with the limiting disc. The second arc groove is a spiral groove with a radius linearly decreasing along the circumferential direction.

[0010] The application further discloses a vacuum pump, and the air filter is arranged at an air inlet end of the vacuum pump.

[0011] The technical scheme has the beneficial effects that: The air filter can realize layer-by-layer filtering from coarse to fine through the three-layer filter rings of the filter assembly: air enters the hollow cylinder through the air inlet side pipe, and sequentially passes through the outer filter ring, the middle filter ring, the inner filter ring, the air permeable side hole, and is discharged after passing through the middle circular pipe and the air outlet lower pipe, so that a hierarchical filtering effect is achieved.

[0012] The air filter can be conveniently disassembled, and the quick-release upper cover can ensure sufficient sealing degree on the basis of quick disassembly: the quick-lock base slides into the inclined sliding groove and the arc flat groove through the lead-in vertical groove, and the locking sliding sleeve is inserted into the first locking groove, so that the quick-release upper cover is fixed; the sealing ring is in sealing contact with the upper edge of the hollow cylinder at all times in the above process, so that effective sealing is ensured.

[0013] The air filter can also unlock the rotation freedom of the filter assembly, so that the filter assembly rotates under the air inlet blowing action, and periodically reciprocates in the longitudinal direction under the action of the driving inclined block and the driven inclined block, so that dust and other sundries are prevented from blocking the air holes. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 is a schematic view of an embodiment of the air filter.

[0016] Figure 2 is a sectional view of an embodiment of the air filter.

[0017] Figure 3 is an isometric sectional view of an embodiment of the air filter.

[0018] Figure 4 is a schematic view of an embodiment of the fixed shell.

[0019] Figure 5is an isometric cutaway view (longitudinal cut) of one embodiment of a stationary housing.

[0020] Figure 6 is an isometric cutaway view (transverse cut) of one embodiment of a stationary housing.

[0021] Figure 7 is a cutaway view of one embodiment of a stationary housing.

[0022] Figure 8 is a schematic view of one embodiment of a filter cartridge assembly.

[0023] Figure 9 is an isometric cutaway view of one embodiment of a filter cartridge assembly.

[0024] Figure 10 is a cutaway view of one embodiment of a quick release upper cover.

[0025] Figure 11 is an isometric cutaway view of one embodiment of a quick release upper cover.

[0026] Figure 12 is an isometric cutaway view of one embodiment of a quick lock assembly and unlock ring.

[0027] Figure 13 is an isometric cutaway view of one embodiment of an unlock ring.

[0028] Figure 14 is an isometric side cutaway view of one embodiment of a control assembly.

[0029] Figure 15 is a schematic view of one embodiment of a control assembly.

[0030] Figure 16 is a schematic view of one embodiment of a driving rotor.

[0031] in the figure: 1. stationary housing, 11. hollow cylinder, 12. inlet side tube, 13. outlet lower tube, 14. annular protrusion, 15. guide lock slot, 151. inclined slide, 152. lead-in vertical slot, 153. arc-shaped flat slot, 154. first lock slot, 155. second lock slot, 16. middle circular tube, 17. air permeable side hole, 18. driving inclined block, 19. guide inclined surface; 2. filter cartridge assembly, 21. bottom ring, 22. top ring, 23. inner filter ring, 24. middle filter ring, 25. outer filter ring, 26. filter cartridge lock ring, 27. containing ring slot, 28. driven inclined block; 3. quick release upper cover, 31. upper cover body, 32. upper cover circular cavity, 33. upper ring slot, 34. contact disc, 35. lower ring slot, 36. sealing ring, 37. upper cover ring slot, 38. upper driving column, 39. lock column through hole; 4. Quick-lock assembly, 41. Quick-lock base, 42. Quick-lock longitudinal hole, 43. Guide round shaft, 44. Side through hole, 45. Locking sleeve, 46. Reset compression spring, 47. Pressed push rod, 48. Pressed inclined surface; 5. Unlocking ring, 51. Unlocking ring body, 52. Unlocking ring groove, 53. Driving inclined surface; 6. Control assembly; 61. Control base, 611. End cylinder, 612. Small-diameter opening, 613. Large-diameter round cavity, 614. Horizontally arranged locking hole; 62. Driving rotor, 621. Limiting disc, 622. Driving arc groove, 6221. First arc groove, 6222. Second arc groove, 623. Lower transmission column; 63. Driven locking rod, 631. Locking rod body, 632. Locking rod plug. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application.

[0033] An air filter includes a fixed shell 1, a filter element assembly 2, a quick-release upper cover 3, a quick-lock assembly 4, and an unlocking ring 5. The fixed shell 1 includes an open-topped hollow cylinder 11, an air inlet side pipe 12 formed on the side surface of the hollow cylinder 11, an air outlet lower pipe 13 formed on the bottom surface of the hollow cylinder 11, an annular convex edge 14 formed on the inner wall of the hollow cylinder 11 above, and guide locking grooves 15 circumferentially and uniformly distributed on the outer wall of the annular convex edge 14. The guide locking grooves 15 include an inclined sliding groove 151 provided on the outer wall of the annular convex edge 14, an import vertical groove 152 provided on the upper end of the inclined sliding groove 151, and an arc-shaped flat groove 153 provided on the lower end of the inclined sliding groove 151. The middle part and the end of the bottom surface of the arc-shaped flat groove 153 are respectively provided with a first locking groove 154 and a second locking groove 155. The bottom of the hollow cylinder 11 is further provided with a centrally arranged circular pipe 16 in communication with the air outlet lower pipe 13, and the centrally arranged circular pipe 16 is provided with a gas-permeable side hole 17. The fixed shell 1 further includes driving inclined blocks 18 circumferentially and uniformly distributed on the bottom surface of the hollow cylinder 11. The driving inclined blocks 18 are arranged in an arc shape in the horizontal plane projection, and gradually increase in height in the counterclockwise direction.

[0034] The filter core assembly 2 comprises a bottom ring 21, a top ring 22, an inner filter ring 23, a middle filter ring 24 and an outer filter ring 25 coaxially arranged between the bottom ring 21 and the top ring 22; the filter core assembly 2 further comprises a filter core locking ring 26 arranged on the top ring 22; the filter core assembly 2 further comprises a receiving groove 27 arranged on the inner side of the lower end surface of the bottom ring 21 for accommodating the driving inclined block 18, and a driven inclined block 28 circumferentially and uniformly arranged in the receiving groove 27 and matched with the driving inclined block 18.

[0035] The quick release upper cover 3 comprises an upper cover body 31 with an open lower end, an upper cover cavity 32 arranged on the lower end surface of the circular top cover of the upper cover body 31, an upper ring groove 33 arranged in the upper cover cavity 32, a contact disc 34 rotatably arranged in the upper cover cavity 32, a lower ring groove 35 arranged on the upper end surface of the contact disc 34 and corresponding to the upper ring groove 33, a sealing ring 36 arranged on the outer side of the lower end surface of the contact disc 34, the sealing ring 36 being in sealing contact with the upper side of the hollow cylinder 11, spherical balls being arranged in the upper ring groove 33 and the lower ring groove 35, an upper cover ring groove 37 being arranged on the circumferential side wall of the upper cover body 31, and an upper driving column 38 being arranged on the lower end surface of the upper cover cavity 32, and a locking column through hole 39 being arranged in the middle of the contact disc 34 and matched with the upper driving column 38.

[0036] The quick lock assembly 4 is arranged on the upper cover body 31, the quick lock assembly 4 corresponds to the guide locking groove 15, the quick lock assembly 4 is slid into the corresponding guide locking groove 15 to realize the locking of the quick release upper cover 3, and the quick lock assembly 4 at least comprises a quick lock base 41 arranged on the inner side of the circumferential side wall of the upper cover body 31; the quick lock assembly 4 further comprises a quick lock longitudinal hole 42 arranged below the quick lock base 41, a guide circular shaft 43 arranged on the upper end of the quick lock longitudinal hole 42, a side through hole 44 arranged on the outer side of the quick lock longitudinal hole 42 and communicated with the upper cover ring groove 37, a locking sliding sleeve 45 slidably sleeved on the guide circular shaft 43, a reset compression spring 46 arranged in the locking sliding sleeve 45, a pressure receiving push rod 47 arranged on the outer side of the locking sliding sleeve 45 and passing through the side through hole 44, and a pressure receiving inclined surface 48 formed on the lower end surface of the pressure receiving push rod 47.

[0037] The unlocking ring 5 comprises an unlocking ring body 51 rotatably arranged in the upper cover ring groove 37, an unlocking ring groove 52 arranged on the inner side of the unlocking ring body 51 and accommodating the pressure receiving push rod 47, and a driving inclined surface 53 circumferentially and uniformly arranged in the unlocking ring groove 52 and matched with the pressure receiving inclined surface 48.

[0038] The air filter further comprises a control assembly 6 for locking and unlocking the rotation freedom of the filter core assembly 2; The control assembly 6 comprises a control base 61, a driving rotor 62 and a driven locking rod 63. The control base 61 comprises an end cylinder 611 arranged on the upper end of the middle circular tube 16, a small-diameter opening 612 arranged on the upper end of the end cylinder 611, and a large-diameter circular cavity 613 arranged below the small-diameter opening 612, wherein two parallel flat locking holes 614 are arranged below the large-diameter circular cavity 613; The driving rotor 62 comprises a limiting disc 621 rotatably arranged in the large-diameter circular cavity 613, a driving arc groove 622 arranged on the lower end surface of the limiting disc 621, and a lower transmission column 623 arranged on the upper end of the limiting disc 621 and penetrating through the small-diameter opening 612, wherein the lower transmission column 623 is in transmission connection with the upper transmission column 38, and the driving arc groove 622 is provided with two arc grooves which are centrally symmetrically distributed; The driven locking rod 63 corresponds to the driving arc groove 622, and the driven locking rod 63 comprises a locking rod body 631 slidably arranged in the flat locking hole 614 and a locking rod plug 632 arranged on the upper end of the locking rod body 631 and in one-to-one plug-in cooperation with the driving arc groove 622.

[0039] As a further embodiment: The driving arc groove 622 comprises a first arc groove 6221 and a second arc groove 6222; The first arc groove 6221 is a circular arc groove coaxially arranged with the limiting disc 621; The second arc groove 6222 is a vortex-shaped groove with a radius linearly decreasing along the circumferential direction.

[0040] The application further discloses a vacuum pump, wherein the air inlet end of the vacuum pump is provided with the air filter. It should be noted that the fixed shell 1 further comprises a guide inclined surface 19 arranged in the air inlet side tube 12.

[0041] It should be noted that the mesh size of the inner filter ring 23, the middle filter ring 24 and the outer filter ring 25 increases in order.

[0042] The air filter can perform hierarchical filtering on air through the filter core assembly 2. Air enters the hollow cylinder 11 through the air inlet side tube 12 and sequentially passes through the outer filter ring 25, the middle filter ring 24 and the inner filter ring 23. The gas passes through the air permeable side hole 17 and is discharged after passing through the middle circular tube 16 and the air outlet lower tube 13, thereby achieving the hierarchical filtering effect.

[0043] The air filter provides a quick disassembly and assembly mode, taking the installation process as an example. S1, installing the filter core assembly 2: The filter core assembly 2 is sleeved into the middle circular tube 16 from top to bottom. S2, installing the quick disassembly upper cover 3: Put the quick release upper cover 3 above the annular convex 14, so that the quick lock base 41 is aligned with the guide-in vertical slot 152 of the guide lock slot 15; Press the quick release upper cover 3 downward, the quick lock base 41 slides into the inclined sliding slot 151 through the guide-in vertical slot 152, in the process, the lock sleeve 45 is pressed to overcome the damping of the reset compression spring 46 and retract upward; Then rotate the quick release upper cover 3 counterclockwise, the quick lock base 41 enters the arc flat slot 153 after passing through the inclined sliding slot 151; Continue to rotate the quick release upper cover 3 until the lock sleeve 45 is aligned with the first lock slot 154, the reset compression spring 46 drives the lock sleeve 45 to extend downward and lock into the first lock slot 154, at this time the quick release upper cover 3 is fixed.

[0044] In the above installation process, the sealing ring 36 is always in contact with the upper end of the hollow cylinder 11 to achieve sealing, even in the process of rotating the upper cover body 31, the upper cover cavity 32, and the upper ring groove 33, the contact disc 34 and the sealing ring 36 always remain in a static state, effectively ensuring the sealing between the hollow cylinder 11 and the quick release upper cover 3.

[0045] It should be noted that a sealing ring is also provided between the upper driving column 38 and the lock column through hole 39 to further achieve the sealing effect.

[0046] It should be noted that in the above steps S1 and S2, the rotation freedom of the filter element assembly 2 is locked: After the quick release upper cover 3 rotates downward along the inclined sliding slot 151 and slides into the arc flat slot 153, the upper driving column 38 just abuts the lower driving column 623, and the quick release upper cover 3 is in driving connection with the driving rotor 62; Continue to rotate the quick release upper cover 3 until the lock sleeve 45 is locked by the first lock slot 154, at this time the driving rotor 62 rotates by a corresponding angle; In the above process, the first arc slot 6221 of the driving arc slot 622 passes through the lock rod plug 632, but since the first arc slot 6221 is a circular arc slot coaxially arranged with the limiting disc 621, the driven lock rod 63 remains unchanged; The driven lock rod 63 abuts the filter element lock ring 26 on the outside, thereby locking the rotation freedom of the filter element assembly 2.

[0047] The air filter described in the present case can also adjust the filter element assembly 2 to rotate and vibrate, reducing the risk of mesh blockage: S3, unlock the rotation freedom of the quick release upper cover 3: Rotate the unlocking ring 5 clockwise until the driving inclined surface 53 presses the pressure inclined surface 48; The pressure inclined surface 48, the pressure push rod 47, the locking sleeve 45 overcome the damping of the reset compression spring 46 and move upward, the lower end of the locking sleeve 45 is pulled out from the first lock slot 154, and the rotation freedom of the quick release upper cover 3 is unlocked; S4, the rotation freedom of the filter element assembly 2 is unlocked; Continue to rotate the quick release upper cover 3 until the locking sleeve 45 slides into the second lock slot 155, and the rotation freedom of the quick release upper cover 3 is locked again; The quick release upper cover 3 drives the driving rotor 62 to continue to rotate; During this process, the second arc groove 6222 of the driving arc groove 622 acts on the lock rod plug 632, and the second arc groove 6222 is a vortex-shaped groove with a radius linearly decreasing in the circumferential direction, thereby driving the driven lock rod 63 to move radially inward; The end of the driven lock rod 63 is out of contact with the filter element lock ring 26, thereby unlocking the rotation freedom of the filter element assembly 2; S5, rotation of the filter element assembly 2: The gas after the guide inclined surface 19 blows to one side of the filter element assembly 2, so that the filter element assembly 2 rotates; During the rotation of the filter element assembly 2, the driven inclined block 28 is constantly acted on by the driving inclined block 18, so that the filter element assembly 2 periodically reciprocates in the vertical direction, and the dust and other impurities on the filter element assembly 2 fall under the action of vibration, effectively slowing down the blockage of the filter element assembly 2.

Claims

1. An air filter comprising a fixed shell (1) and a filter element assembly (2), characterized in that: it further comprises a quick-release upper cover (3) and a quick-lock assembly (4); the fixed shell (1) comprises an open-topped hollow cylinder (11), an air inlet side pipe (12) formed on the side surface of the hollow cylinder (11), an air outlet lower pipe (13) formed on the bottom surface of the hollow cylinder (11), an annular convex edge (14) formed on the inner wall of the hollow cylinder (11) above, and guide lock grooves (15) circumferentially and uniformly distributed on the outer wall of the annular convex edge (14); the filter element assembly (2) comprises a bottom circular ring (21) and a top circular ring (22), and coaxially distributed inner, middle and outer filter rings (23, 24, 25) are arranged between the bottom circular ring (21) and the top circular ring (22); the quick-release upper cover (3) comprises an open-bottom upper cover body (31), an upper cover circular cavity (32) arranged on the lower end surface of the circular top cover of the upper cover body (31), an upper ring groove (33) arranged in the upper cover circular cavity (32), a rotatable contact disc (34) arranged in the upper cover circular cavity (32), a lower ring groove (35) arranged on the upper end surface of the contact disc (34) and corresponding to the upper ring groove (33), a sealing circular ring (36) arranged on the lower end surface of the contact disc (34) and in sealing contact with the upper edge of the hollow cylinder (11), and spherical balls arranged in the upper ring groove (33) and the lower ring groove (35); the quick-lock assembly (4) is arranged on the upper cover body (31), the quick-lock assembly (4) corresponds to the guide lock grooves (15) one by one, the quick-lock assembly (4) is slid into the corresponding guide lock grooves (15) to realize locking of the quick-release upper cover (3), and the quick-lock assembly (4) at least comprises a quick-lock base (41) arranged inside the circumferential side wall of the upper cover body (31).

2. The air filter according to claim 1, characterized in that: the guide lock grooves (15) comprise inclined sliding grooves (151) arranged on the outer wall of the annular convex edge (14), guide vertical grooves (152) arranged on the upper end of the inclined sliding grooves (151), and arc-shaped flat grooves (153) arranged on the lower end of the inclined sliding grooves (151), and the middle and end of the bottom surface of the arc-shaped flat grooves (153) are respectively provided with first and second lock grooves (154, 155); the circumferential side wall of the upper cover body (31) is provided with an upper cover ring groove (37); the quick-lock assembly (4) further comprises a quick-lock longitudinal hole (42) arranged below the quick-lock base (41), a guide circular shaft (43) arranged on the upper end of the quick-lock longitudinal hole (42), a side ring hole (44) arranged on the outer side of the quick-lock longitudinal hole (42) and communicating with the upper cover ring groove (37), a locking sliding sleeve (45) slidably sleeved on the guide circular shaft (43), a reset compression spring (46) arranged in the locking sliding sleeve (45), a pressure receiving inclined surface (48) formed on the lower end surface of a pressure receiving push rod (47) arranged on the outer side of the locking sliding sleeve (45) and passing through the side ring hole (44), and ​ The air filter further comprises an unlocking ring (5), the unlocking ring (5) comprises a rotatable unlocking ring body (51) arranged in the upper cover ring groove (37), an unlocking ring groove (52) arranged in the unlocking ring body (51) and containing the pressure push rod (47), and a driving inclined surface (53) circumferentially and uniformly arranged in the unlocking ring groove (52) and matched with the pressure inclined surface (48).

3. The air filter according to claim 2, characterized in that: The bottom of the hollow cylinder (11) is further provided with a middle circular pipe (16) communicated with the air outlet lower pipe (13), and the middle circular pipe (16) is provided with a breathable side hole (17).

4. The air filter according to claim 3, characterized in that: The upper end surface of the upper cover circular cavity (32) is provided with an upper driving column (38), and the middle part of the contact disc (34) is provided with a lock column through hole (39) matched with the upper driving column (38); The filter element assembly (2) further comprises a filter element lock ring (26) arranged on the top circular ring (22) along the circumference; The air filter further comprises a control assembly (6) for locking and unlocking the rotation freedom of the filter element assembly (2); The control assembly (6) comprises a control base (61), a driving rotor (62) and a driven lock rod (63); The control base (61) comprises an end cylindrical part (611) arranged on the upper end of the middle circular pipe (16), a small-diameter opening (612) arranged on the upper end of the end cylindrical part (611), and a large-diameter circular cavity (613) arranged below the small-diameter opening (612), wherein two parallel flat lock holes (614) are arranged below the large-diameter circular cavity (613); The driving rotor (62) comprises a limiting disc (621) rotatably arranged in the large-diameter circular cavity (613), a driving arc groove (622) arranged on the lower end surface of the limiting disc (621), and a lower transmission column (623) arranged on the upper end of the limiting disc (621) and penetrating through the small-diameter opening (612), wherein the lower transmission column (623) is in transmission connection with the upper transmission column (38), and the driving arc groove (622) is provided with two center-symmetrically distributed driving arc grooves (622); The driven lock rod (63) corresponds to the driving arc groove (622) one by one, and the driven lock rod (63) comprises a lock rod body (631) slidably arranged in the flat lock hole (614), and a lock rod plug (632) arranged on the upper end of the lock rod body (631) and one-by-one inserted into the driving arc groove (622).

5. The air filter according to claim 4, characterized in that: The fixed shell (1) further comprises driving inclined blocks (18) circumferentially and uniformly arranged on the bottom surface of the hollow cylinder (11), wherein the driving inclined blocks (18) are arranged in an arc shape on the horizontal plane projection, and the driving inclined blocks (18) gradually increase in height in the counterclockwise direction; The filter element assembly (2) further comprises a containing ring groove (27) arranged in the lower end surface of the bottom circular ring (21) and used for containing the driving inclined blocks (18), and driven inclined blocks (28) circumferentially and uniformly arranged in the containing ring groove (27) and matched with the driving inclined blocks (18).

6. The air filter according to claim 5, characterized in that: the active arc groove (622) comprises a first arc groove (6221) and a second arc groove (6222); the first arc groove (6221) is a circular arc groove coaxially arranged with the limiting disc (621); the second arc groove (6222) is a vortex-shaped groove with a radius linearly decreasing in the circumferential direction.

7. A vacuum pump, characterized in that: the air filter according to any one of claims 1-6 is arranged at the air inlet end of the vacuum pump.

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