Fan

Abstract

The invention provides a fan which comprises a machine head, the machine head comprises a motor and a plurality of fan blades, the motor comprises a rotating shaft, the fan blades can be driven by the rotating shaft to rotate around a rotating axis to drive air to flow, and the rotating axis extends in the axial direction of the rotating shaft. The fan further comprises an air filtering assembly capable of filtering air driven by the multiple fan blades, the air filtering assembly is provided with a filtering material used for filtering the air driven by the multiple fan blades, and the air filtering assembly is detachably installed on the machine head. When the fan works, the air filtering assembly and a filtering material of the air filtering assembly can be conveniently taken down to be cleaned or replaced, when the fan works in an air exhausting mode, air driven by the fan blades is filtered by the filtering material of the air filtering assembly, and therefore the fan can exhaust filtered clean air. In conclusion, the user experience of the fan can be improved based on the design.

Description

Technical Field

[0001] The invention relates to a fan, in particular to a fan with an air purification function. Background Art

[0002] Fans are usually used to blow air to cool down or to promote air circulation. If the air in the environment where the fan is located contains a lot of impurities or there is a lot of dust and debris nearby, when the fan is exhausting air, it drives the air to flow, causing the air to carry impurities, dust, debris, etc. to fly, which in turn causes the air quality to deteriorate, giving users a poor user experience and having an adverse effect on the user's health. Summary of the invention

[0003] In view of the shortcomings of existing fans, this patent application provides a fan with an air purification function, which is used to discharge relatively clean air after filtering, thereby improving the user experience of the fan.

[0004] The technical solution adopted in this patent application is as follows: a fan includes a head, the head includes a motor and a plurality of fan blades, the motor includes a rotating shaft, the plurality of fan blades can rotate around a rotating axis driven by the rotating shaft to drive air flow, the rotating axis extends along the axial direction of the rotating shaft, the fan also includes an air filter assembly that can filter the air driven by the plurality of fan blades, the air filter assembly has a filter material for filtering the air driven by the plurality of fan blades, and the air filter assembly can be detachably mounted on the head.

[0005] Based on this design, the air filter assembly is detachable relative to the machine head, so that the air filter assembly and its filter material can be removed for cleaning or replacement. When the fan is exhausting, the air driven by the plurality of fan blades is filtered by the filter material of the air filter assembly, thereby enabling the fan to discharge relatively clean air after filtering. In summary, based on this design, the user experience of the fan can be improved.

[0006] Optionally, the head also includes an air guide tube, the motor is at least partially located in the air guide tube, the air guide tube surrounds the rotation axis, and one of the air filter assembly and the air guide tube is provided with a first flexible sealing gasket, the first flexible sealing gasket surrounds the rotation axis, the first flexible sealing gasket is used for sealing between the air guide tube and the air filter assembly, and the first flexible sealing gasket is affixed to the other of the air filter assembly and the air guide tube.

[0007] Optionally, the air filter assembly includes an outer cylinder portion, which surrounds the filter material, and one of the air guide tube and the outer cylinder portion is provided with a snap protrusion, and the other of the air guide tube and the outer cylinder portion is provided with a matching groove corresponding to the snap protrusion, and the matching groove includes a first section groove and a second section groove. During the installation of the air filter assembly in the air guide tube, the snap protrusion can slide along the first section groove to the second section groove as the outer cylinder portion moves into the air guide tube, and can further slide along the second section groove as the outer cylinder portion rotates relative to the air guide tube.

[0008] Optionally, the second groove is provided with a bayonet, and when the air filter assembly is installed in the air guide tube, the buckle protrusion slides along the first groove to the second groove and slides along the second groove to the bayonet and is limited at the bayonet; the bayonet is located on one side of the second groove close to the first groove on opposite sides in a direction parallel to the rotation axis; the first flexible sealing gasket squeezed between the air filter assembly and the air guide tube causes the air filter assembly to have a tendency to move outward relative to the air guide tube, causing the buckle protrusion and the corresponding inner wall of the bayonet to press against each other along the axial direction of the air guide tube.

[0009] Optionally, the second groove is provided with a limiting protrusion, and when the air filter assembly is installed in the air guide tube, the snap protrusion slides along the first groove to the second groove and slides along the second groove to slide over the limiting protrusion and slide into place, and the snap protrusion may interfere with the limiting protrusion and be blocked by the limiting protrusion in the process of sliding over the limiting protrusion, and the snap protrusion is located on one side of the second groove that is close to the first groove on opposite sides in a direction parallel to the rotation axis.

[0010] Optionally, the snap protrusion is provided on the air filter assembly, the matching groove is provided on the air guide tube, the first section of the groove extends into the air guide tube along the inner circumferential surface of the air guide tube and extends to the second section of the groove, the air guide tube also includes a bell-mouth portion, the inner diameter of the bell-mouth portion gradually increases in the direction away from the plurality of fan blades, the bell-mouth portion surrounds the rotation axis, the bell-mouth portion surrounds the outer circumference of the air filter assembly, one end of the first section of the groove away from the second section of the groove is provided at the bell-mouth portion, and at least a portion of the first section of the groove extends into the air guide tube along the inner circumferential surface of the bell-mouth portion.

[0011] Optionally, the first flexible sealing gasket is arranged on the air filter assembly and abuts against the air guide tube; the air guide tube also includes a bell-mouth portion, the inner diameter of the bell-mouth portion gradually increases in the direction away from the plurality of fan blades, the bell-mouth portion surrounds the rotation axis, the bell-mouth portion is located on the air inlet side of the air guide tube, and under the drive of the plurality of fan blades, the air passes through the air filter assembly and enters the air guide tube; the air filter assembly is disc-shaped, the air filter assembly is installed to the bell-mouth portion, the bell-mouth portion surrounds the outer circumference of the air filter assembly, and the first flexible sealing gasket abuts against the inner circumferential surface of the bell-mouth portion.

[0012] Optionally, the air filter assembly includes an outer cylinder portion, which surrounds the filter material, and the first flexible sealing gasket is provided on the outer cylinder portion, and the first flexible sealing gasket is used for sealing between the bell mouth portion and the outer cylinder portion, and the first flexible sealing gasket includes a flange portion, which surrounds the rotation axis, and the flange portion is abutted against the inner circumferential surface of the bell mouth portion, and the flange portion is squeezed between the bell mouth portion and the outer cylinder portion.

[0013] Optionally, the first flexible sealing gasket is arranged on the air filter assembly and abuts against the air guide tube; the air filter assembly includes an outer cylinder portion and an inner cylinder portion, the outer cylinder portion and the inner cylinder portion respectively surround the rotation axis, the filter material surrounds the inner cylinder portion, and the filter material is located between the outer cylinder portion and the inner cylinder portion; the first flexible sealing gasket is used for sealing between the air guide tube and the outer cylinder portion.

[0014] Optionally, the outer cylinder portion includes an outer cylinder body and an outer flange, the outer flange is located at the outer periphery of the outer cylinder body, the outer cylinder body and the outer flange respectively surround the rotation axis, the outer cylinder body surrounds the filter material, and the first flexible sealing gasket includes a clamping portion, the clamping portion surrounds the rotation axis, the clamping portion is embedded between the outer flange and the outer cylinder body and clamped and fixed between the outer flange and the outer cylinder body.

[0015] Optionally, the clamping portion includes a first clamping edge and a second clamping edge, the first clamping edge and the second clamping edge respectively surround the rotation axis, the outer cylinder portion also includes a first rib, the first rib is integrally connected to the outer flange, the first rib surrounds the rotation axis, the air filter assembly is located on one of the two axially opposite sides of the air guide cylinder, the first rib protrudes toward the other of the two axially opposite sides of the air guide cylinder, the first rib is embedded between the first clamping edge and the second clamping edge, the first clamping edge is embedded between the first rib and the outer flange and is clamped and fixed between the first rib and the outer flange, and the second clamping edge is embedded between the first rib and the outer cylinder body and is clamped and fixed between the first rib and the outer cylinder body.

[0016] Optionally, the outer flange is arranged on one side away from the plurality of fan blades on two axially opposite sides of the outer cylinder portion, the air filter assembly is provided with a snap protrusion, the air guide cylinder is provided with a matching groove corresponding to the snap protrusion, the snap protrusion is protruding on the outer circumferential surface of the outer cylinder body, the matching groove is arranged on the inner surface of the air guide cylinder, the outer cylinder portion is injection molded, the outer cylinder portion is provided with a demolding clearance hole corresponding to the snap protrusion, the demolding clearance hole passes through the outer flange in a direction parallel to the rotation axis, and the snap protrusion and the corresponding demolding clearance hole are spaced apart in a direction parallel to the rotation axis.

[0017] Optionally, the outer circumferential surface of the outer cylinder body is further provided with a demoulding clearance groove, and the demoulding clearance groove extends from the corresponding snap protrusion along a direction parallel to the rotation axis to the demoulding clearance through hole.

[0018] Optionally, the first flexible sealing gasket includes a flange portion, which surrounds the rotation axis, and the first flexible sealing gasket is sealed against the air guide tube by means of the flange portion. The flange portion is turned outward from a side of the first flexible sealing gasket away from the outer flange, and the flange portion and the clamping portion are spaced apart in a direction parallel to the rotation axis, and the flange portion is in contact with the inner surface of the air guide tube.

[0019] Optionally, the air filter assembly also includes a protective fence, the outer cylinder portion also includes an outer cylinder body and an inner flange, the first flexible sealing gasket is detachably mounted on the outer cylinder body; the outer cylinder body surrounds the filter material, the inner flange is integrally connected to the outer cylinder body and surrounds the rotation axis, the inner flange is located on the inner circumference of the outer cylinder body, the protective fence is located between the outer cylinder portion and the inner cylinder portion, the protective fence is integrally formed with the outer cylinder portion and the inner cylinder portion, and the protective fence connects the inner flange and the inner cylinder portion; the inner flange and the protective fence are located on the side of the filter material facing away from the plurality of fan blades, the inner flange is in contact with the filter material in a direction parallel to the rotation axis; the filter material and the protective fence are spaced apart in a direction parallel to the rotation axis.

[0020] Optionally, the air filter assembly further comprises a handle for a person to hold, and the handle is arranged in a central area of ​​the air filter assembly.

[0021] Optionally, the air filter assembly includes an inner cylinder portion, which surrounds the rotation axis, and the handle is in the shape of an elongated strip intersecting the rotation axis. The handle is connected to the inner cylinder portion, and the space enclosed by the inner cylinder portion can accommodate at least a part of a person's hand when the handle is held.

[0022] Optionally, the handle is located on a side of the inner cylinder away from the plurality of fan blades, opposite ends of the handle are respectively connected to the inner cylinder, the handle is integrally formed with the inner cylinder, and the handle extends from one radial side of the inner cylinder to the opposite radial side of the inner cylinder.

[0023] Optionally, the head also includes an air guide tube, one of the air guide tube and the air filter assembly is provided with a snap protrusion, and the other of the air guide tube and the air filter assembly is provided with a matching groove corresponding to the snap protrusion, and the matching groove includes a first section groove and a second section groove, and the air filter assembly is disc-shaped, and the user can use the handle to rotate the air filter assembly relative to the air guide tube. During the installation of the air filter assembly in the air guide tube, the snap protrusion can slide along the first section groove to the second section groove as the air filter assembly moves into the air guide tube, and can further slide along the second section groove as the air filter assembly rotates relative to the air guide tube; when the air filter assembly is removed from the air guide tube, the user can hold the handle to rotate the air filter assembly, so that the snap protrusion slides along the second section groove and gradually exits the second section groove; and the user can hold the handle to move the air filter assembly outward relative to the air guide tube, so that the snap protrusion slides along the first section groove and gradually exits the first section groove.

[0024] Optionally, the air filter assembly includes an outer cylinder portion and an inner cylinder portion, the outer cylinder portion and the inner cylinder portion respectively surround the rotation axis, the filter material is in the shape of a disc with a central area as a through opening, the filter material surrounds the inner cylinder portion, the outer periphery of the filter material is bonded to the inner periphery of the outer cylinder portion, and the inner periphery of the filter material is bonded to the outer periphery of the inner cylinder portion, and the air filter assembly can be installed on and removed from the machine head as a whole.

[0025] Optionally, the fan also includes a second flexible sealing gasket, the air filter assembly is located upstream of the plurality of fan blades, the motor includes a casing, the casing is provided with a plurality of first ventilation and heat dissipation holes and a plurality of second ventilation and heat dissipation holes, the plurality of first ventilation and heat dissipation holes and the plurality of second ventilation and heat dissipation holes are used for heat dissipation of the motor, the plurality of first ventilation and heat dissipation holes are located upstream of the plurality of second ventilation and heat dissipation holes, the plurality of first ventilation and heat dissipation holes and the plurality of second ventilation and heat dissipation holes are located on opposite sides of the motor in the axial direction, and the second flexible sealing gasket is used to seal the gap between the casing and the air filter assembly to isolate the upstream side of the plurality of first ventilation and heat dissipation holes from the downstream side of the air filter layer.

[0026] Optionally, the air filter assembly is disc-shaped, and the air filter assembly also includes a protective baffle member, which is arranged in the central area of ​​the air filter assembly, and the protective baffle member is provided with a plurality of third ventilation and heat dissipation holes, and the plurality of third ventilation and heat dissipation holes are located on the upstream side of the plurality of first ventilation and heat dissipation holes. When the fan is exhausting, air can flow through the plurality of third ventilation and heat dissipation holes, the plurality of first ventilation and heat dissipation holes, and the plurality of second ventilation and heat dissipation holes in sequence to dissipate heat for the motor. The second flexible sealing gasket is fixed on the protective baffle member and abuts against the casing. The second flexible sealing gasket is used to block the gap between the casing and the protective baffle member to isolate the plurality of third ventilation and heat dissipation holes from the downstream side of the air filter layer, so as to prevent the air entering between the protective baffle member and the motor from the plurality of third ventilation and heat dissipation holes from flowing from the gap between the casing and the protective baffle member to the downstream side of the filter material.

[0027] Optionally, the casing includes a first side wall and a second side wall, the first side wall and the second side wall are located on opposite axial sides of the motor, the plurality of first ventilation and heat dissipation holes are opened on the first side wall, the plurality of second ventilation and heat dissipation holes are opened on the second side wall, the second side wall is located on the side of the motor away from the protective baffle member, and the second flexible sealing gasket is squeezed between the first side wall and the protective baffle member.

[0028] Optionally, the second flexible sealing gasket is squeezed between the casing and the protective baffle, the second flexible sealing gasket surrounds the rotation axis, the projections of the third ventilation and heat dissipation holes along the rotation axis and the projections of the first ventilation and heat dissipation holes along the rotation axis are respectively within the range encircled by the inner circumferential contour of the projection of the second flexible sealing gasket along the rotation axis.

[0029] Optionally, the air filter assembly includes an inner cylinder portion, which surrounds the rotation axis, the filter material is located on the radial outside of the inner cylinder portion, the protective baffle is located on the radial inside of the inner cylinder portion, the filter material surrounds the inner cylinder portion, and the protective baffle is installed and fixed to the inner cylinder portion.

[0030] Optionally, the protective baffle member is provided with a plurality of positioning protrusions, and the inner cylinder portion is provided with a plurality of mounting grooves corresponding to the plurality of positioning protrusions, the mounting grooves are recessed in the inner circumferential surface of the inner cylinder portion, the mounting grooves include guide grooves and clamping grooves, the clamping grooves are located at one end of the corresponding guide grooves, the recessed depth of the clamping grooves is greater than the recessed depth of the corresponding guide grooves, and when the protective baffle member is installed on the inner cylinder portion, the positioning protrusions can move along the mounting grooves to the clamping grooves and be buckled with the clamping grooves.

[0031] Optionally, the protective baffle member also includes a baffle body and a first ring wall, and the plurality of third ventilation and heat dissipation holes are opened in the baffle body; the casing includes a first side wall, and the plurality of first ventilation and heat dissipation holes are opened in the first side wall, and the first side wall is located on one side of the baffle body on opposite axial sides of the motor, the second flexible sealing gasket is pasted on the baffle body and abuts against the first side wall, the second flexible sealing gasket is squeezed between the first side wall and the baffle body, the first ring wall surrounds the rotation axis, the projections of the plurality of third ventilation and heat dissipation holes along the rotation axis and the projections of the second flexible sealing gasket along the rotation axis are respectively within the range defined by the outer peripheral contour of the projection of the first ring wall along the rotation axis, the inner cylinder portion surrounds the first ring wall, and the inner cylinder portion and the first ring wall are sealed by interference fit.

[0032] Optionally, the protective baffle member also includes a barrel wall, an annular groove corresponding to the second flexible sealing gasket, a second rib, a second annular wall, and a plurality of positioning protrusions for clamping on the inner barrel portion, the barrel wall, annular groove, second rib, and second annular wall respectively surround the rotation axis, the annular groove is formed on the side of the baffle body facing the motor, the barrel wall and the second rib are respectively integrally connected to the baffle body, the interval between the barrel wall and the second rib constitutes the annular groove, the first annular wall and the second annular wall are spaced opposite to each other in a direction parallel to the rotation axis, the first annular wall and the second annular wall are respectively located between the barrel wall and the inner barrel portion and are respectively integrally connected to the barrel wall, the second annular wall is located on the side of the first annular wall close to the plurality of fan blades, the plurality of positioning protrusions are located on the outer periphery of the second annular wall and respectively extend integrally from the second annular wall, and the first side wall is accommodated in the space surrounded by the barrel wall.

[0033] Optionally, the baffle body includes a third annular wall, which surrounds the rotation axis, and is spaced opposite to the first annular wall in a direction parallel to the rotation axis. The third annular wall is located between the cylinder wall and the inner cylinder portion and is integrally connected to the cylinder wall. The third annular wall is located on the side of the first annular wall away from the plurality of fan blades, and is surrounded by the inner cylinder portion and radially spaced apart from the inner cylinder portion, and the third annular wall blocks the first annular wall to the outside.

[0034] Optionally, the air filter assembly includes an inner cylinder portion, which surrounds the rotation axis, the filter material is located on the radially outer side of the inner cylinder portion, the filter material surrounds the inner cylinder portion, one axial end of the motor is accommodated in the space surrounded by the inner cylinder portion, the motor includes a casing, the casing is provided with a plurality of first ventilation and heat dissipation holes, the heat dissipation airflow of the motor flows into the motor through the plurality of first ventilation and heat dissipation holes, and the plurality of first ventilation and heat dissipation holes are located at the one axial end of the motor.

[0035] Optionally, the head also includes an air guide tube and an air inlet mesh cover, the air guide tube surrounds the rotation axis, the air filter assembly is detachably installed on the air inlet side of the air guide tube, the air filter assembly is located on the side of the air inlet mesh cover away from the plurality of fan blades, the air inlet mesh cover is located inside the air guide tube and is fixedly installed on the air guide tube, the motor is installed and fixed on the air inlet mesh cover, the air inlet mesh cover is formed with a accommodating port, the accommodating port is located in the central area of ​​the air inlet mesh cover, the motor passes through the accommodating port, the motor includes a flange ring, the flange ring is located on the outer periphery of the motor, the flange ring surrounds the rotation axis, the motor is installed and fixed to the air inlet mesh cover with the aid of the flange ring, and the flange ring is accommodated in the accommodating port.

[0036] Optionally, an inner peripheral contour of the projection of the filter material along the rotation axis is located within a range defined by an outer peripheral contour of the projection of the flange ring along the rotation axis.

[0037] Optionally, the air inlet mesh cover includes an inner ring and an outer ring, the inner ring is a closed circular ring, the inner ring constitutes the innermost circle of metal wire of the air inlet mesh cover, the outer ring is a closed circular ring, the outer ring constitutes the outermost circle of metal wire of the air inlet mesh cover, the inner ring is surrounded by a flange ring, the accommodating opening is formed by the inner ring, the inner circumference of the filter material projected along the rotation axis is located within the range defined by the inner circumference of the inner ring along the rotation axis, and the outer circumference of the outer ring along the rotation axis is located within the range defined by the outer circumference of the filter material projected along the rotation axis.

[0038] Optionally, the air inlet mesh cover includes an inner ring, an outer ring, a plurality of first positioning feet, and a plurality of second positioning feet, the inner ring constituting the innermost circle of metal wires of the air inlet mesh cover, the outer ring constituting the outermost circle of metal wires of the air inlet mesh cover, the plurality of first positioning feet are adjacent to the outer ring, the plurality of second positioning feet are adjacent to the inner ring, the air guide tube includes a plurality of mounting parts corresponding to the plurality of first positioning feet, the mounting parts are located on the inner circumference of the air guide tube, the mounting parts are provided with a socket and a screw hole, the first positioning foot includes an insertion section and a pressing section, the insertion section and the pressing section are connected to form an L shape, the insertion section is inserted into the insertion hole, the machine head also includes a first locking element, the first locking element is screwed and fixed to the screw hole to press the pressing section against the mounting part.

[0039] Optionally, the machine head also includes an air guide tube, an air inlet mesh cover, and an air outlet mesh cover, the air inlet mesh cover is located upstream of the plurality of fan blades, the air outlet mesh cover is located downstream of the plurality of fan blades, the motor is at least partially located inside the air guide tube, the air guide tube surrounds the rotation axis, the air filter assembly, the air inlet mesh cover, the plurality of fan blades, and the air outlet mesh cover are distributed in sequence in the axial direction of the air guide tube, the plurality of fan blades are located inside the air guide tube, the axial opposite sides of the air guide tube constitute the air inlet side and the air outlet side of the air guide tube, the air outlet mesh cover is located on the air outlet side of the air guide tube, the air inlet mesh cover is located inside the air guide tube and is mounted and fixed on the air guide tube, the motor is mounted and fixed on the air inlet mesh cover, the air filter assembly is adjacent to the air inlet mesh cover, after the air filter assembly is removed from the machine head, the fan loses the air filter assembly and can be used as a fan without air filtering function for blowing air, and the air filter assembly includes a handle that can be held by a person's hand to move the air filter assembly.

[0040] Optionally, the air filter assembly can be installed on and removed from the machine head as a whole, and the handle is arranged at the central area of ​​the air filter assembly; a receiving port is formed in the central area of ​​the air inlet mesh cover, and the motor passes through the receiving port, and the motor includes a flange ring, and the flange ring is located at the outer periphery of the motor. The motor is mounted and fixed to the air inlet mesh cover with the aid of the flange ring, and the flange ring is accommodated in the receiving port, and the rotation axis passes through the receiving port and intersects with the handle; the air guide cylinder also includes a bell-mouth portion, and the inner diameter of the bell-mouth portion gradually increases in the direction away from the plurality of fan blades, and the bell-mouth portion surrounds the rotation axis, and the bell-mouth portion is located on the air inlet side of the air guide cylinder, and the air filter assembly is installed to the bell-mouth portion, and the air filter assembly is disc-shaped, and the bell-mouth portion surrounds the outer periphery of the air filter assembly.

[0041] Optionally, the filter material is a HEPA filter material, and the filter material is in the shape of a disk with a through opening in the central region, and the rotation axis passes through the through opening of the filter material. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A three-dimensional diagram of the fan of the present patent application;

[0043] Figure 2 Another perspective view of the fan of the present patent application;

[0044] Figure 3 An exploded view of the fan head of the present patent application;

[0045] Figure 4 Another exploded view of the fan head of the present patent application;

[0046] Figure 5 for Figure 4 A partial enlarged view of

[0047] Figure 6 A vertical cross-sectional view of the fan head of the present patent application (the cross-sectional view is the vertical plane where the rotation axis A is located);

[0048] Figure 7 for Figure 6 A partial enlarged view of

[0049] Figure 8 Another vertical cross-sectional view of the fan head of the present patent application (the cross-sectional view is a vertical plane parallel to the rotation axis A);

[0050] Fig. 9 for Figure 8 A partial enlarged view of

[0051] Fig.10 An exploded view of the air filter assembly of the fan of the present patent application;

[0052] Fig.11 Another exploded view of the air filter assembly of the fan of the present patent application (filter material and first flexible sealing gasket are not shown);

[0053] Fig.12 This is a three-dimensional view of the air inlet grille of the fan head of this patent application. DETAILED DESCRIPTION

[0054] Please refer to Figures 1 to 12 The fan disclosed in the patent application includes a head 10, the head 10 includes a motor 2, a plurality of blades 100, the motor 2 includes a rotating shaft 20, the plurality of blades 100 can rotate around a rotating axis A driven by the rotating shaft 20 to drive air flow, the rotating axis A extends along the axial direction of the rotating shaft 20, and the fan 1 also includes an air filter assembly 11 that can filter the air driven by the plurality of blades 100, the air filter assembly 11 has a filter material 110 for filtering the air driven by the plurality of blades 100, and the air filter assembly 11 is detachably mounted on the head 10. Based on this design, the air filter assembly 11 is detachable relative to the head 10, so that the air filter assembly 11 and its filter material 110 can be removed for cleaning or replacement. When the fan 1 is exhausting, the air driven by the plurality of blades 100 is filtered by the filter material 110 of the air filter assembly 11, so that the fan 1 can discharge relatively clean air after filtering; in summary, based on this design, the user experience of the fan 1 can be improved.

[0055] In this embodiment, the filter material 110 may be HEPA filter material (i.e., High Efficiency Particulate Air Filter), and the filter material 110 is in a folded state, so that the unfolded area of ​​the filter material 110 is larger, increasing the filter area of ​​the filter material 110; the filter material 110 may also be other filter papers, foams, etc. The rated power of the motor 2 is between 45 watts and 4000 watts, and the fan 1 also includes a support stand 12 for supporting the head 10. The fan 1 can also be supported on the ground by the support stand 12, and the head 10 is rotatably connected to the support stand 12, so as to facilitate the adjustment of the pitch angle of the head 10 to adjust the air outlet direction of the head 10.

[0056] The head 10 also includes an air guide 3, the motor 2 is at least partially located in the air guide 3, the air guide 3 surrounds the rotation axis A, and one of the air filter assembly 11 and the air guide 3 is provided with a first flexible sealing gasket 6, the first flexible sealing gasket 6 surrounds the rotation axis A, and the first flexible sealing gasket 6 is used for sealing between the air guide 3 and the air filter assembly 11, and the first flexible sealing gasket 6 is close to the other of the air filter assembly 11 and the air guide 3. Based on the sealing of the first flexible sealing gasket 6, it is beneficial to suppress the air from selectively flowing through the gap between the air guide 3 and the air filter assembly 11 without being filtered, so that more air will be filtered by the air filter assembly 11, and the filtering efficiency of the air filter assembly 11 is improved. In this embodiment, the rotation axis A constitutes the central axis of the air guide 3.

[0057] The air filter assembly 11 includes an outer cylinder 7, which surrounds the filter material 110. One of the air guide tube 3 and the outer cylinder 7 is provided with a snap protrusion 70, and the other of the air guide tube 3 and the outer cylinder 7 is provided with a matching groove 30 corresponding to the snap protrusion 70. The matching groove 30 includes a first section groove 300 and a second section groove 301. When the air filter assembly 11 is installed in the air guide tube 3, the snap protrusion 70 can slide along the first section groove 300 to the second section groove 301 as the outer cylinder 7 moves into the air guide tube 3, and can further slide along the second section groove 301 as the outer cylinder 7 rotates relative to the air guide tube 3. Such a design is conducive to the convenient installation of the air filter assembly 11 in the air guide tube 3. The first section groove 300 and the second section groove 301 are connected to form an L shape.

[0058] The second section groove 301 is provided with a bayonet 3010. When the air filter assembly 11 is installed on the air guide tube 3, the buckle protrusion 70 slides along the first section groove 300 to the second section groove 301 and slides along the second section groove 301 to the bayonet 3010 and is limited at the bayonet 3010; the bayonet 3010 is located on one side of the second section groove 301 that is close to the first section groove 300 on the opposite sides in the direction parallel to the rotation axis A. Further, the bayonet 3010 is located on one side of the second section groove 301 that is away from the first section groove 300 and is close to the first section groove 300 on the opposite sides in the direction parallel to the rotation axis A; the air filter assembly 11 is installed on the air guide tube 3. The first flexible sealing gasket 6 between the filter assembly 11 and the air guide tube 3 causes the air filter assembly 11 to have a tendency to move outward relative to the air guide tube 3, and causes the buckle protrusion 70 to abut against the inner wall of the corresponding bayonet 3010 along the axial direction of the air guide tube 3, thereby promoting the close fit between the buckle protrusion 70 and the bayonet 3010, which is conducive to the air filter assembly 11 being stably maintained on the air guide tube 3; the movement of the buckle protrusion 70 involved in the above description is the relative movement of the buckle protrusion 70 relative to the matching groove 30, which can be that the buckle protrusion 70 is moving while the matching groove 30 is not moving, or that the matching groove 30 is moving while the buckle protrusion 70 is not moving. In this embodiment: the air filter assembly 11 is evenly provided with four buckle protrusions 70, and correspondingly, the air guide tube 3 is evenly provided with four matching grooves 30. The first flexible sealing gasket 6 squeezed between the air filter assembly 11 and the air guide cylinder 3 tends to return to its original shape and has an elastic recovery expansion force, which causes the air filter assembly 11 to have a tendency to move outward relative to the air guide cylinder 3.

[0059] The second section groove 301 is provided with a limiting protrusion 3011. When the air filter assembly 11 is installed in the air guide 3, the buckle protrusion 70 slides along the first section groove 300 to the second section groove 301 and slides along the second section groove 301 to slide over the limiting protrusion 3011 and slides into place. When the buckle protrusion 70 slides over the limiting protrusion 3011, it may interfere with the limiting protrusion 3011 and be blocked by the limiting protrusion 3011. The buckle protrusion 70 is located on one side of the second section groove 301 that is close to the first section groove 300 on the opposite sides in the direction parallel to the rotation axis A. The buckle protrusion 70 interferes with the sliding over the limiting protrusion 3011 to give the user a prompt that the buckle protrusion 70 slides into place, and the limiting protrusion 3011 can prevent the buckle protrusion 70 from accidentally falling out of the position in place.

[0060] The buckle protrusion 70 is provided on the air filter assembly 11, the matching groove 30 is provided on the air guide 3, the first section groove 300 extends along the inner circumferential surface of the air guide 3 into the air guide 3 and extends to the second section groove 301, the air guide 3 also includes a bell mouth portion 31, the inner diameter of the bell mouth portion 31 gradually increases in the direction away from the plurality of fan blades 100, the bell mouth portion 31 surrounds the rotation axis A, the bell mouth portion 31 surrounds the outer periphery of the air filter assembly 11, one end of the first section groove 300 away from the second section groove 301 is provided at the bell mouth portion 31, and at least a part of the first section groove 300 extends along the inner circumferential surface of the bell mouth portion 31 into the air guide 3. In this design, the first section groove 300 is arranged based on the bell mouth portion 31, which is conducive to the buckle protrusion 70 entering the first section groove 300 more smoothly when the air filter assembly 11 is installed. The second section groove 301 is located outside the bell mouth portion 31 and is located on the side of the bell mouth portion 31 close to the plurality of fan blades 100. The first section groove 300 extends substantially along the axial direction of the air guide cylinder 3 , and the second section groove 301 extends substantially along the circumferential direction of the air guide cylinder 3 .

[0061] The air filter assembly 11 is located on the air inlet side of the head 10, and the first flexible sealing gasket 6 is provided on the air filter assembly 11 and abuts against the air guide tube 3; the bell mouth portion 31 is located on the air inlet side of the air guide tube 3, and driven by the plurality of fan blades 100, the air passes through the air filter assembly 11 and enters the air guide tube 3; the air filter assembly 11 is disc-shaped, and the first flexible sealing gasket 6 abuts against the inner circumferential surface of the bell mouth portion 31 to achieve sealing with the bell mouth portion 31; the outward expansion shape of the bell mouth portion 31 facilitates the installation of the air filter assembly 11 to the bell mouth portion 31, and also facilitates the abutment and sealing between the bell mouth portion 31 and the first flexible sealing gasket 6.

[0062] The first flexible sealing gasket 6 is arranged on the outer cylinder portion 7. The first flexible sealing gasket 6 is used for sealing between the bell-mouth portion 31 and the outer cylinder portion 7. The first flexible sealing gasket 6 includes a flange portion 60. The flange portion 60 surrounds the rotation axis A. The flange portion 60 is pressed against the inner circumferential surface of the bell-mouth portion 31. The first flexible sealing gasket 6 is sealed against the bell-mouth portion 31 by means of the flange portion 60. The flange portion 60 is squeezed between the bell-mouth portion 31 and the outer cylinder portion 7 to achieve effective sealing between the bell-mouth portion 31 and the outer cylinder portion 7.

[0063] The outer cylinder portion 7 surrounds the rotation axis A, and the first flexible sealing gasket 6 is arranged on the air filter assembly 11 and abuts against the air duct 3; the air filter assembly 11 includes an inner cylinder portion 111, the inner cylinder portion 111 surrounds the rotation axis A, the filter material 110 surrounds the inner cylinder portion 111, and the filter material 110 is located between the outer cylinder portion 7 and the inner cylinder portion 111; the first flexible sealing gasket 6 is used for sealing between the air duct 3 and the outer cylinder portion 7.

[0064] The outer cylinder part 7 includes an outer cylinder body 71 and an outer flange 72. The outer flange 72 is located at the outer periphery of the outer cylinder body 71. The outer cylinder body 71 and the outer flange 72 surround the rotation axis A respectively. The first flexible sealing gasket 6 includes a clamping portion 61. The outer cylinder body 71 surrounds the filter material 110. The clamping portion 61 surrounds the rotation axis A. The clamping portion 61 is embedded between the outer flange 72 and the outer cylinder body 71 and is clamped and fixed between the outer flange 72 and the outer cylinder body 71. Such a design effectively facilitates the installation and positioning of the first flexible sealing gasket 6 on the outer cylinder part 7. In this embodiment, the first flexible sealing gasket 6 is made of rubber. When the first flexible sealing gasket 6 is manufactured, a long rubber strip is first provided, and then the opposite ends of the rubber strip are bonded together so that the rubber strip is circled to form the first flexible sealing gasket 6; the inner circumferential surface of the first flexible sealing gasket 6 attached to the outer tube body 71 is also provided with at least one circle of annular convex ribs, and the annular convex ribs surround the outer tube body 71. The first flexible sealing gasket 6 uses the annular convex ribs to strengthen the contact and friction between the first flexible sealing gasket 6 and the outer tube body 71.

[0065] The clamping portion 61 includes a first clamping edge 610 and a second clamping edge 611, and the first clamping edge 610 and the second clamping edge 611 respectively surround the rotation axis A. The outer cylinder portion 7 also includes a first rib 73, which is integrally connected to the outer flange 72, and the first rib 73 surrounds the rotation axis A. The first rib 73 is located between the outer flange 72 and the outer cylinder body 71. The air filter assembly 11 is located on one of the two axially opposite sides of the air guide cylinder 3, and the first rib 73 protrudes toward the other side of the two axially opposite sides of the air guide cylinder 3. The first rib 73 is embedded between the first clamping edge 610 and the second clamping edge 611. The first clamping edge 610 is embedded between the first rib 73 and the outer flange 72 and is clamped and fixed between the first rib 73 and the outer flange 72. The second clamping edge 611 is embedded between the first rib 73 and the outer cylinder body 71 and is clamped and fixed between the first rib 73 and the outer cylinder body 71. Such a design facilitates more stable installation and positioning of the first flexible sealing pad on the outer cylinder 7 by means of the clamping portion 61 .

[0066] The outer flange 72 is arranged on one side of the axially opposite sides of the outer cylinder 7 that is away from the plurality of blades 100, the buckle protrusion 70 is arranged on the outer cylinder body 71, the buckle protrusion 70 is in a convex state on the outer peripheral surface of the outer cylinder body 71, the matching groove 30 is arranged on the inner surface of the air guide tube 3, the outer cylinder 7 is injection molded, and the outer cylinder 7 is provided with a demoulding clearance through hole 74 corresponding to the buckle protrusion 70, the demoulding clearance through hole 74 passes through the outer flange 72 in a direction parallel to the rotation axis A, and the buckle protrusion 70 and the corresponding demoulding clearance through hole 74 are spaced apart in a direction parallel to the rotation axis A. The demoulding clearance through hole 74 facilitates demoulding of the mold in a direction parallel to the rotation axis A when the outer cylinder 7 and its buckle protrusion 70 are injection molded, which is conducive to reducing the mold cost.

[0067] The outer circumferential surface of the outer cylinder body 71 is also concavely provided with a demoulding clearance groove 75, which extends from the corresponding snap protrusion 70 along a direction parallel to the rotation axis A to the demoulding clearance through hole 74. The demoulding clearance groove 75 is provided to accommodate the demoulding clearance through hole 74 and the snap protrusion 70, so as to facilitate demoulding of the mold in a direction parallel to the rotation axis A when the outer cylinder part 7 and its snap protrusion 70 are injection molded.

[0068] The first flexible sealing gasket 6 is sealed against the air guide tube 3 by means of the flange portion 60. The flange portion 60 is turned outward from the side of the first flexible sealing gasket 6 away from the outer flange 72. The flange portion 60 and the clamping portion 61 are spaced apart in a direction parallel to the rotation axis A. The flange portion 60 is in contact with the inner surface of the air guide tube 3.

[0069] The first flexible sealing gasket 6 is detachably mounted on the outer cylinder body 71; the air filter assembly 11 also includes a protective fence 112, and the outer cylinder portion 7 also includes an inner flange 76, which is integrally connected to the outer cylinder body 71 and surrounds the rotation axis A, and the outer flange 72 and the inner flange 76 are located on opposite sides of the outer cylinder body 71 in the radial direction, and the outer flange 72 and the inner flange 76 are respectively integrally connected to one end of the axial opposite ends of the outer cylinder body 71 away from the plurality of fan blades 100, and the inner flange 76 is located on the inner periphery of the outer cylinder body 71, and the protective fence 112 is located between the outer cylinder portion 7 and the inner cylinder portion 111, and the protective fence 112 is integrally formed with the outer cylinder portion 7 and the inner cylinder portion 111, and the protective fence 112 is connected to the inner cylinder portion 71. The flange 76 and the inner cylinder 111; the inner flange 76 and the protective fence 112 are located on the side of the filter material 110 that is opposite to the plurality of fan blades 100, and the inner flange 76 and the filter material 110 are in contact with each other in a direction parallel to the rotation axis A, so that the inner flange 76 can provide support for the filter material 110 on one side of the filter material 110; the filter material 110 and the protective fence 112 are spaced apart in a direction parallel to the rotation axis A, so that the portion of the filter material 110 that overlaps with the protective fence 112 in a direction parallel to the rotation axis A can also filter the air, avoiding the substantial reduction of the air intake area or the filter area of ​​the filter material 110 due to the existence of the protective fence 112. The air filter assembly 11 can also have a flexible pre-filter layer, which is in the form of a sheet and can be arranged between the filter material 110 and the protective fence 112, and the pre-filter layer is attached to the air intake side of the filter material 110 to play a pre-filtering role.

[0070] The air filter assembly 11 also includes a handle 113 for a person to hold. The handle 113 is arranged in the central area of ​​the air filter assembly 11, so that the handle 113 is centered, which is convenient for a person to hold, and also convenient for the user to grasp the air filter assembly 11 more balancedly through the handle 113.

[0071] The handle 113 intersects with the rotation axis A. Furthermore, the handle 113 is in the shape of an elongated strip intersecting with the rotation axis A. The handle 113 is connected to the inner cylinder portion 111. The space enclosed by the inner cylinder portion 111 can accommodate at least a portion of a person's hand when the person holds the handle 113, which means that the inner cylinder portion 111 provides space for a person's hand to hold the handle 113.

[0072] The handle 113 is located on the side of the inner cylinder 111 away from the plurality of blades 100, and the opposite ends of the handle 113 are respectively connected to the inner cylinder 111. The handle 113 is integrally formed with the inner cylinder 111, and the handle 113 extends from one radial side of the inner cylinder 111 to the other radial side of the inner cylinder 111. Such a design facilitates the stable combination of the handle 113 and the inner cylinder 111, and the arrangement of the handle 113 relative to the inner cylinder 111 is also convenient for manual operation; the rotation axis A is perpendicular to the handle 113.

[0073] The inner cylinder portion 111 is provided with support ribs 1110, which are in contact with the filter material 110 in a direction parallel to the rotation axis A, so that the support ribs 1110 can provide support to the filter material 110 on one side of the filter material 110. The support ribs 1110 are provided on the periphery of the inner cylinder portion 111 and surround the rotation axis A.

[0074] The air filter assembly 11 is disc-shaped. Based on the handle 113 provided in the central area, the user can use the handle 113 to rotate the air filter assembly 11 relative to the air guide tube 3; during the installation of the air filter assembly 11 in the air guide tube 3, the buckle protrusion 70 can slide along the first section groove 300 to the second section groove 301 as the air filter assembly 11 moves into the air guide tube 3, and can further slide along the second section groove 301 as the air filter assembly 11 rotates relative to the air guide tube 3; when removing the air filter assembly 11 from the air guide tube 3, the user can hold the handle 113 to rotate the air filter assembly 11, so that the buckle protrusion 70 slides along the second section groove 301 and gradually exits the second section groove 301; and the user can hold the handle 113 to move the air filter assembly 11 outward relative to the air guide tube 3, so that the buckle protrusion 70 slides along the first section groove 300 and gradually exits the first section groove 300. The user can conveniently remove the air filter assembly 11 installed on the air guide cylinder 3 from the air guide cylinder 3 by holding the handle 113 .

[0075] The filter material 110 is in the shape of a disk with a through opening 1100 in the center area, and the rotation axis A passes through the through opening 1100 of the filter material 110. The filter material 110 surrounds the inner cylinder 111, and the outer periphery of the filter material 110 is bonded to the inner periphery of the outer cylinder 7, and the inner periphery of the filter material 110 is bonded to the outer periphery of the inner cylinder 111. The air filter assembly 11 can be installed on and removed from the head 10 as a whole. With this design, the air filter assembly 11 has a strong integrity, and it is convenient to install and remove the air filter assembly 11 as a whole.

[0076] The handle 113 is for a person to hold in order to move the air filter assembly 11. The air filter assembly 11 can be installed on and removed from the air guide tube 3 as a whole. Furthermore, the air filter assembly 11 can be installed on and removed from the air guide tube 3 as a whole with one hand through the handle 113. When installing the air filter assembly 11 into the air guide tube 3, the user can hold the handle 113 and push the air filter assembly 11 into the air guide tube 3, so that the buckle protrusion 70 moves along the first section groove 300 and slides to the second section groove 301, and the user can hold the handle 113 to rotate the air filter assembly 11, so that the buckle protrusion 70 slides into place along the second section groove 301, thereby installing the air filter assembly 11 in the air guide tube 3.

[0077] The fan 1 also includes a second flexible sealing gasket 13, the air filter assembly 11 is located upstream of the plurality of fan blades 100, the motor 2 includes a casing 21, the casing 21 is provided with a plurality of first ventilation and heat dissipation holes 2100 and a plurality of second ventilation and heat dissipation holes 2110, the plurality of first ventilation and heat dissipation holes 2100 and the plurality of second ventilation and heat dissipation holes 2110 are used for heat dissipation of the motor 2, the plurality of first ventilation and heat dissipation holes 2100 are located upstream of the plurality of second ventilation and heat dissipation holes 2110, the heat dissipation airflow of the motor 2 flows into the motor 2 through the plurality of first ventilation and heat dissipation holes 2100 and flows out of the motor 2 through the plurality of second ventilation and heat dissipation holes 2110, the plurality of first ventilation and heat dissipation holes 2100 and the plurality of second ventilation and heat dissipation holes 2110 are located on opposite sides of the axial direction of the motor 2, and the second flexible sealing gasket 13 is used to block the gap between the casing 21 and the air filter assembly 11 to isolate the upstream side of the plurality of first ventilation and heat dissipation holes 2100 from the downstream side of the air filter layer. Such a design and isolation are conducive to ensuring the filtration efficiency of the air filter assembly 11. If there is no blocking of the second flexible sealing gasket 13, the downstream side of the filter material 110 forms a strong negative pressure when the fan 1 is exhausting, which has a strong attraction for the air, so that the air on the upstream side of the first ventilation and heat dissipation holes 2100 is easily sucked into the downstream side of the air filter layer, thereby causing less air to choose to flow through the filter material 110, resulting in reduced filtration efficiency; in addition, the second flexible sealing gasket 13 inhibits the air on the upstream side of the first ventilation and heat dissipation holes 2100 from being sucked into the downstream side of the air filter layer, thereby inhibiting the reduction of the heat dissipation airflow of the motor 2, and ensuring the heat dissipation effect of the motor 2. The second flexible sealing gasket 13 can be made of PU material (i.e., polyurethane material) or EVA material (i.e., ethylene-vinyl acetate copolymer material), but is not limited thereto.

[0078] The air filter assembly 11 also includes a protective baffle member 8, which is arranged in the central area of ​​the air filter assembly 11. The protective baffle member 8 is provided with a plurality of third ventilation and heat dissipation holes 800, and the plurality of third ventilation and heat dissipation holes 800, the plurality of first ventilation and heat dissipation holes 2100, and the plurality of second ventilation and heat dissipation holes 2110 are fluidly connected in sequence, and the plurality of third ventilation and heat dissipation holes 800 are located on the upstream side of the plurality of first ventilation and heat dissipation holes 2100. When the fan 1 is exhausting, air can flow through the plurality of third ventilation and heat dissipation holes 800, the plurality of first ventilation and heat dissipation holes 2100, and the plurality of second ventilation and heat dissipation holes 2110 in sequence to dissipate heat for the motor 2. The second flexible sealing gasket 13 is fixed on the protective baffle member 8 and abuts against the casing 21. The second flexible sealing gasket 13 is used to block the gap between the casing 21 and the protective baffle member 8 to perform heat dissipation between the plurality of third ventilation and heat dissipation holes 800 and the downstream side of the air filter layer. The air between the protective baffle member 8 and the motor 2 is prevented from flowing from the third ventilation and heat dissipation holes 800 to the downstream side of the filter material 110 through the gap between the casing 21 and the protective baffle member 8, thereby facilitating that the air between the third ventilation and heat dissipation holes 800 and the motor 2 can basically flow into the motor 2 through the first ventilation and heat dissipation holes 2100, so as to ensure that the motor 2 has sufficient heat dissipation airflow and can effectively dissipate heat; if there is no blocking of the second flexible sealing gasket 13, the air flowing through the third ventilation and heat dissipation holes 800 will more easily choose to flow from the gap between the casing 21 and the protective baffle member 8 to the downstream side of the filter material 110 when the fan 1 is exhausting, thereby reducing the airflow through the filter material 110 and reducing the filtration efficiency.

[0079] The second flexible sealing gasket 13 is squeezed between the housing 21 and the protective baffle 8. The second flexible sealing gasket 13 surrounds the rotation axis A. The projections of the third ventilation and heat dissipation holes 800 along the rotation axis A and the projections of the first ventilation and heat dissipation holes 2100 along the rotation axis A are respectively within the range defined by the inner circumference contour of the projection of the second flexible sealing gasket 13 along the rotation axis A. Such a design is conducive to the second flexible sealing gasket 13 to more effectively surround the area between the third ventilation and heat dissipation holes 800 and the first ventilation and heat dissipation holes 2100, so as to effectively ensure that the air entering the area from the third ventilation and heat dissipation holes 800 flows through the first ventilation and heat dissipation holes 2100 for heat dissipation of the motor 2. The projection along the rotation axis A is a projection formed with the direction parallel to the rotation axis A as the projection direction. The plurality of first ventilation and heat dissipation holes 2100 are arranged around the rotation axis A, and the plurality of third ventilation and heat dissipation holes 800 are arranged around the rotation axis A; the aperture of the third ventilation and heat dissipation holes 800 is designed to be smaller, which helps to prevent large particles of debris from entering the motor 2.

[0080] The housing 21 includes a first side wall 210 and a second side wall 211. The first side wall 210 and the second side wall 211 are located on opposite sides of the motor 2 in the axial direction. The first ventilation and heat dissipation holes 2100 are opened on the first side wall 210, and the second ventilation and heat dissipation holes 2110 are opened on the second side wall 211. The second side wall 211 is located on the side of the motor 2 away from the protective baffle 8. The second flexible sealing gasket 13 is squeezed between the first side wall 210 and the protective baffle 8. In the direction parallel to the rotation axis A, the motor 2, the protective baffle 8, and the handle 113 are distributed in sequence.

[0081] The filter material 110 is located on the radially outer side of the inner cylinder 111 , the protective baffle member 8 is located on the radially inner side of the inner cylinder 111 , the filter material 110 surrounds the inner cylinder 111 , and the protective baffle member 8 is installed and fixed to the inner cylinder 111 .

[0082] The protective baffle member 8 is provided with a plurality of positioning protrusions 81, and the protective baffle member 8 is fixed to the inner cylinder portion 111 by means of the plurality of positioning protrusions 81. The inner cylinder portion 111 is provided with a plurality of mounting grooves corresponding to the plurality of positioning protrusions 81, and the mounting grooves are recessed in the inner circumferential surface of the inner cylinder portion 111. The mounting grooves include a guide groove 1111 and a clamping groove 1112. The clamping groove 1112 is located at one end of the corresponding guide groove 1111, and the recessed depth of the clamping groove 1112 is greater than the recessed depth of the corresponding guide groove 1111. When the protective baffle member 8 is installed in the inner cylinder portion 111, the positioning protrusion 81 can move along the mounting groove to the clamping groove 1112 and be clamped together with the clamping groove 1112. In this embodiment: the protective baffle member 8 is evenly provided with four positioning protrusions 81, and correspondingly, the inner cylinder portion 111 is evenly provided with four mounting grooves. In this embodiment, the second flexible sealing gasket 13 is glued and fixed on the protective baffle member 8, and can be regarded as a part of the air filter assembly 11.

[0083] The protective baffle member 8 also includes a baffle body 80 and a first annular wall 82. The plurality of third ventilation and heat dissipation holes 800 are provided in the baffle body 80. The first side wall 210 faces the baffle body 80 in a direction parallel to the rotation axis A. The first side wall 210 is located on one side of the baffle body 80 on the opposite axial sides of the motor 2. The second flexible sealing gasket 13 is pasted on the baffle body 80 and abuts against the first side wall 210. The second flexible sealing gasket 13 is squeezed between the first side wall 210 and the baffle body 80. Between the plate main body 80, the first annular wall 82 surrounds the rotation axis A, and the projections of the third ventilation and heat dissipation holes 800 along the rotation axis A and the projections of the second flexible sealing gasket 13 along the rotation axis A are respectively within the range encircled by the outer peripheral contour of the projection of the first annular wall 82 along the rotation axis A. The inner cylinder portion 111 surrounds the first annular wall 82, and the inner cylinder portion 111 and the first annular wall 82 are interference fit and sealed, which effectively prevents air from flowing between the first annular wall 82 and the inner cylinder portion 111.

[0084] The protective baffle member 8 also includes a cylinder wall 83, an annular groove 84 corresponding to the second flexible sealing gasket 13, a second rib 85, and a second annular wall 86. The plurality of positioning protrusions 81 are used to be clamped on the inner cylinder portion 111. The cylinder wall 83, the annular groove 84, the second rib 85, and the second annular wall 86 respectively surround the rotation axis A. The annular groove 84 is formed on the side of the baffle body 80 facing the motor 2. The cylinder wall 83 and the second rib 85 are respectively connected to the baffle body 80 in one piece. The interval between the cylinder wall 83 and the second rib 85 constitutes the annular groove 84. The second rib 85 is connected to the baffle body 80 in one piece. An annular wall 82 and a second annular wall 86 are spaced apart from each other in a direction parallel to the rotation axis A. The first annular wall 82 and the second annular wall 86 are respectively located between the cylinder wall 83 and the inner cylinder portion 111 and are respectively integrally connected to the cylinder wall 83. The second annular wall 86 is located on a side of the first annular wall 82 close to the plurality of fan blades 100. The plurality of positioning protrusions 81 are located on the outer periphery of the second annular wall 86 and respectively extend integrally from the second annular wall 86. The first side wall 210 is accommodated in the space enclosed by the cylinder wall 83 to facilitate the compact layout of the motor 2 and the protective baffle 8.

[0085] The baffle body 80 includes a third annular wall 801, which surrounds the rotation axis A. The third annular wall 801 is spaced apart from the first annular wall 82 in a direction parallel to the rotation axis A. The third annular wall 801 is located between the cylinder wall 83 and the inner cylinder portion 111 and is integrally connected to the cylinder wall 83. The third annular wall 801 is located on a side of the first annular wall 82 away from the plurality of fan blades 100. The third annular wall 801 is surrounded by the inner cylinder portion 111 and is radially spaced apart from the inner cylinder portion 111 so that the protective baffle member 8 can be installed on the inner cylinder portion 111. The third annular wall 801 is prevented from excessive friction with the inner surface of the inner cylinder 111, and the third annular wall 801 can smoothly enter the inner cylinder 111; the third annular wall 801 blocks the first annular wall 82 from the outside. Since the first annular wall 82 and the inner cylinder 111 are sealed by interference fit, the first annular wall 82 may be deformed by the action of the inner cylinder 111, resulting in a poor appearance. The third annular wall 801 blocks the first annular wall 82 from the outside, so as to avoid the first annular wall 82 from being exposed to the outside, and to promote the appearance of the protective baffle 8 to be more refined and intact. In this embodiment, the protective baffle 8 is a single plastic part formed in one piece; the first annular wall 82 is thinner than the second annular wall 86 and the third annular wall 801, and is more suitable for deformation. The thinner the first annular wall 82 is, the closer the interference fit between it and the inner circumferential surface of the inner cylinder 111 is, so as to improve the sealing performance.

[0086] The head 10 also includes an air inlet mesh cover 9, the motor 2 is at least partially located in the air guide tube 3, and the air guide tube 3 surrounds the rotation axis A. The air filter assembly 11 is detachably installed on the air inlet side of the air guide tube 3, and the air filter assembly 11 is located on the side of the air inlet mesh cover 9 away from the plurality of fan blades 100. The air inlet mesh cover 9 is located in the air guide tube 3 and is fixed to the air guide tube 3. The motor 2 is installed and fixed to the air inlet mesh cover 9. The motor 2 is located in the middle of the air inlet mesh cover 9. The air inlet mesh cover 9 is formed with a receiving port 90, and the receiving port 90 is located in the central area of ​​the air inlet mesh cover 9. The motor 2 passes through the receiving port 90. The motor 2 includes a flange ring 22, and the flange ring 22 is located on the outer periphery of the motor 2. The flange ring 22 surrounds the rotation axis A. The motor 2 is installed and fixed to the air inlet mesh cover 9 with the aid of the flange ring 22, and the flange ring 22 is accommodated in the receiving port 90.

[0087] The inner peripheral contour of the filter material 110 projected along the rotation axis A is located within the range defined by the outer peripheral contour of the flange ring 22 projected along the rotation axis A, which helps to ensure that the filter material 110 provides a large filtering area.

[0088] The air inlet mesh cover 9 includes an inner ring 91 and an outer ring 92. The inner ring 91 is a closed ring, and the inner ring 91 constitutes the innermost circle of metal wires of the air inlet mesh cover 9. The outer ring 92 is a closed ring, and the outer ring 92 constitutes the outermost circle of metal wires of the air inlet mesh cover 9. The inner ring 91 surrounds the flange ring 22, and the receiving opening 90 is formed by the inner ring 91. The inner peripheral contour of the projection of the filter material 110 along the rotation axis A is located within the range defined by the inner peripheral contour of the projection of the inner ring 91 along the rotation axis A, and the outer peripheral contour of the projection of the outer ring 92 along the rotation axis A is located within the range defined by the outer peripheral contour of the projection of the filter material 110 along the rotation axis A, so that the effective radial dimension between the inner periphery and the outer periphery of the filter material 110 is larger, which is conducive to ensuring that the filter material 110 provides a large filtering area. The inner ring 91 is radially spaced from the flange ring 22. The air inlet grille 9 further includes a spiral wire coil 93 between the inner ring 91 and the outer ring 92 , and the spiral wire coil 93 is formed by winding a plurality of circles of metal wire.

[0089] The filter material 110 is located on the radially outer side of the inner cylinder portion 111, the protective baffle member 8 is located on the radially inner side of the inner cylinder portion 111, the filter material 110 surrounds the inner cylinder portion 111, and one axial end of the motor 2 is accommodated in the space surrounded by the inner cylinder portion 111, so as to facilitate the compact layout of the motor 2 and the inner cylinder portion 111, and the heat dissipation airflow of the motor 2 flows into the motor 2 through the plurality of first ventilation and heat dissipation holes 2100, and the plurality of first ventilation and heat dissipation holes 2100 are located on the one axial end of the motor 2.

[0090] The air inlet grille 9 is provided with a plurality of first positioning legs 94 and a plurality of second positioning legs 95, wherein the plurality of first positioning legs 94 are adjacent to the outer ring 92, and the plurality of second positioning legs 95 are adjacent to the inner ring 91, and the air guide tube 3 includes a plurality of mounting portions 32 corresponding to the plurality of first positioning legs 94, the mounting portions 32 are located at the inner periphery of the air guide tube 3, the mounting portions 32 are provided with insertion holes 320 and screw holes 321, the first positioning legs 94 include an insertion section 940 and a pressing section 941, the insertion section 940 and the pressing section 941 are connected to form an L shape, the insertion section 940 is inserted into the insertion hole 320, the machine head 10 includes a first locking element 101 and a second locking element, the first locking element 101 is screwed and fixed to the screw hole 321 and the pressing section 941 is pressed against the mounting portion 32, thereby the first positioning legs 94 are installed and fixed on the mounting portion 32, so that the air inlet grille 9 is fixed to the air guide tube 3. The first locking element 101 can be bolts, screws, etc., and the first locking element 101 can include washers to assist the first locking element 101 in pressing and fixing the pressing section 941; the second positioning leg 95 and the flange ring 22 are locked together by the second locking element, so that the motor 2 is fixed to the air inlet grille 9; the second locking element can be bolts, screws, etc., and the second locking element can include washers to assist the second locking element in locking the second positioning leg 95. The insertion hole 320 penetrates the mounting portion 32 along the axial direction of the air guide 3.

[0091] The head 10 also includes an air outlet mesh cover 102, the air inlet mesh cover 9 is located upstream of the plurality of fan blades 100, and the air outlet mesh cover 102 is located downstream of the plurality of fan blades 100. The motor 2 is at least partially located in the air guide tube 3, and the air guide tube 3 surrounds the rotation axis A. The air filter component 11, the air inlet mesh cover 9, the plurality of fan blades 100, and the air outlet mesh cover 102 are sequentially distributed in the axial direction of the air guide tube 3. Driven by the plurality of fan blades 100, air flows through the air filter component 11, the air inlet mesh cover 9, and the air outlet mesh cover 102 in sequence. The plurality of fan blades 100 are located in the air guide tube 3, and the axial opposite sides of the air guide tube 3 constitute the air inlet side and the air outlet side of the air guide tube 3. The air outlet mesh cover 102 is located on the air outlet side of the air guide tube 3. Further The air outlet mesh cover 102 is detachably mounted and fixed on the air outlet side of the air guide tube 3, the air filter assembly 11 is detachably mounted and fixed on the air inlet side of the air guide tube 3, the air filter assembly 11 can be installed as a whole on the air inlet side of the air guide tube 3 and removed from the air inlet side of the air guide tube 3, the air inlet mesh cover 9 is located inside the air guide tube 3 and is fixed on the air guide tube 3, the motor 2 is fixed on the air inlet mesh cover 9, the air filter assembly 11 is adjacent to the air inlet mesh cover 9, after the air filter assembly 11 is removed from the head 10, the fan 1 loses the air filter assembly 11 and can be used as a fan 1 without air filtering function for blowing, the air filter assembly 11 includes a handle 113 that can be held by a person's hand to move the air filter assembly 11. With such a design, the fan 1 of this design is more practical and suitable for promotion and application. The rotation axis A passes through the accommodating opening 90 and intersects with the handle 113.

Claims

1. A fan, comprising a head, the head comprising a motor and a plurality of blades, the motor comprising a rotating shaft, the plurality of blades being driven by the rotating shaft to rotate around a rotating axis to drive air flow, the rotating axis extending along the axial direction of the rotating shaft, Features: The fan also includes an air filter assembly that can filter the air driven by the plurality of fan blades. The air filter assembly has a filter material for filtering the air driven by the plurality of fan blades. The air filter assembly is detachably mounted on the head.

2. The fan according to claim 1, Features: The head also includes an air guide tube, the motor is at least partially located in the air guide tube, the air guide tube surrounds the rotation axis, and one of the air filter assembly and the air guide tube is provided with a first flexible sealing gasket, the first flexible sealing gasket surrounds the rotation axis, the first flexible sealing gasket is used for sealing between the air guide tube and the air filter assembly, and the first flexible sealing gasket is affixed to the other of the air filter assembly and the air guide tube.

3. The fan according to claim 2, Features: The air filter assembly includes an outer cylinder portion, which surrounds the filter material, one of the air guide tube and the outer cylinder portion is provided with a snap protrusion, and the other of the air guide tube and the outer cylinder portion is provided with a matching groove corresponding to the snap protrusion, and the matching groove includes a first section groove and a second section groove. When the air filter assembly is installed in the air guide tube, the snap protrusion can slide along the first section groove to the second section groove as the outer cylinder portion moves into the air guide tube, and can further slide along the second section groove as the outer cylinder portion rotates relative to the air guide tube.

4. The fan according to claim 3, Features: The second groove is provided with a bayonet, and when the air filter assembly is installed in the air guide tube, the buckle protrusion slides along the first groove to the second groove and slides along the second groove to the bayonet and is limited at the bayonet; the bayonet is located on one side of the second groove close to the first groove on opposite sides in the direction parallel to the rotation axis; the first flexible sealing gasket squeezed between the air filter assembly and the air guide tube causes the air filter assembly to have a tendency to move outward relative to the air guide tube, causing the buckle protrusion and the corresponding inner wall of the bayonet to abut against each other along the axial direction of the air guide tube.

5. The fan according to claim 3, Features: The second groove is provided with a limiting protrusion. When the air filter assembly is installed in the air guide tube, the snap protrusion slides along the first groove to the second groove and slides along the second groove to slide over the limiting protrusion and slide into place. In the process of the snap protrusion sliding over the limiting protrusion, the snap protrusion may interfere with the limiting protrusion and be blocked by the limiting protrusion. The snap protrusion is located on one side of the second groove that is close to the first groove on opposite sides in a direction parallel to the rotation axis.

6. The fan according to claim 3, Features: The snap protrusion is provided on the air filter assembly, the matching groove is provided on the air guide tube, the first section of the groove extends into the air guide tube along the inner circumferential surface of the air guide tube and extends to the second section of the groove, the air guide tube also includes a bell-mouth portion, the inner diameter of the bell-mouth portion gradually increases in the direction away from the plurality of fan blades, the bell-mouth portion surrounds the rotation axis, the bell-mouth portion surrounds the outer circumference of the air filter assembly, one end of the first section of the groove away from the second section of the groove is provided at the bell-mouth portion, and at least a portion of the first section of the groove extends into the air guide tube along the inner circumferential surface of the bell-mouth portion.

7. The fan according to claim 2, Features: The first flexible sealing gasket is arranged on the air filter assembly and abuts against the air guide tube; the air guide tube also includes a bell-mouth portion, the inner diameter of the bell-mouth portion gradually increases in the direction away from the plurality of fan blades, the bell-mouth portion surrounds the rotation axis, the bell-mouth portion is located on the air inlet side of the air guide tube, and under the drive of the plurality of fan blades, the air passes through the air filter assembly and enters the air guide tube; the air filter assembly is disc-shaped, the air filter assembly is installed to the bell-mouth portion, the bell-mouth portion surrounds the outer circumference of the air filter assembly, and the first flexible sealing gasket abuts against the inner circumferential surface of the bell-mouth portion.

8. The fan according to claim 7, Features: The air filter assembly includes an outer cylinder portion, which surrounds the filter material. The first flexible sealing gasket is arranged on the outer cylinder portion. The first flexible sealing gasket is used for sealing between the bell mouth portion and the outer cylinder portion. The first flexible sealing gasket includes a flange portion, which surrounds the rotation axis. The flange portion is in contact with the inner circumferential surface of the bell mouth portion, and the flange portion is squeezed between the bell mouth portion and the outer cylinder portion.

9. The fan according to claim 2, Features: The first flexible sealing gasket is arranged on the air filter assembly and is close to the air guide tube; the air filter assembly includes an outer cylinder part and an inner cylinder part, the outer cylinder part and the inner cylinder part respectively surround the rotation axis, the filter material surrounds the inner cylinder part, and the filter material is located between the outer cylinder part and the inner cylinder part; the first flexible sealing gasket is used for sealing between the air guide tube and the outer cylinder part.

10. The fan according to claim 9, Features: The outer cylinder portion includes an outer cylinder body and an outer flange, wherein the outer flange is located at the outer periphery of the outer cylinder body, and the outer cylinder body and the outer flange respectively surround the rotation axis, and the outer cylinder body surrounds the filter material, and the first flexible sealing gasket includes a clamping portion, which surrounds the rotation axis, and the clamping portion is embedded between the outer flange and the outer cylinder body and is clamped and fixed between the outer flange and the outer cylinder body.

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