A pull-out centrifugal fan

Abstract

The application discloses a pull-out type centrifugal fan and belongs to the fan field. The pull-out type centrifugal fan comprises a shell, a sliding seat slidingly connected to one side of the shell, an impeller rotatingly connected to the sliding seat, and an impeller motor fixedly connected to the sliding seat and used for driving the impeller to rotate. A cleaning mechanism for cleaning the shell and the impeller is slidingly connected between the shell and the sliding seat. The cleaning mechanism comprises a cleaning cover slidingly connected to one side of the shell, a rotating ring rotatingly connected to the cleaning cover and parallel to a rotating shaft of the impeller, and a cleaning ring slidingly connected to the rotating ring along an axial direction of the rotating ring. Cleaning parts are uniformly arranged on the cleaning ring in a circumferential direction. According to the scheme, the impeller is separated from the shell by moving the sliding seat, and the impeller and the shell can be cleaned respectively.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of fans, and more particularly relates to a pull-out type centrifugal fan. BACKGROUND

[0002] A centrifugal fan is a kind of driven fluid machinery which improves the pressure of gas and discharges gas by inputting mechanical energy.

[0003] The impeller assembly in the centrifugal fan is usually fixedly installed in the casing, and after the fan is used for a long time, dust and various impurities are adhered to the impeller assembly and components matched with the impeller assembly, such as an impeller shaft and various connecting pieces. If the entire impeller assembly is directly disassembled for cleaning, the later positioning and assembling process of the impeller assembly is troublesome, and a certain manpower is required in the carrying process.

[0004] The patent with the publication number CN115199593A discloses a self-cleaning centrifugal fan, which comprises a fan body, a support located in an annular cavity and connected with the shell, a containing cylinder connected with the support, a gap is formed on one side of the inner wall of the annular impeller, a cleaning roller is rotationally connected with the containing cylinder, one side of the cleaning roller extends to the outside of the gap, and the rotation axis of the cleaning roller is parallel to the rotation axis of the annular impeller, a driving member is in transmission connection with the cleaning roller, a brush is connected with the outer wall of the cleaning roller and used for contacting the blades, and a dust removal assembly is connected with the containing cylinder, a containing cavity is formed in the containing cylinder, and the dust removal assembly is used for discharging the dust in the containing cavity out of the shell. The application has the effects of reducing the dust on the blades in the centrifugal fan, improving the air discharge efficiency, reducing the noise, and reducing the maintenance workload.

[0005] In the above patent, the impeller is always close to the shell during cleaning, and it is difficult to clean it carefully. Meanwhile, using the brush to clean will inevitably cause scratches on the surface of the parts, affecting the subsequent normal use. SUMMARY

[0006] The technical problem to be solved by the application is to provide a pull-out type centrifugal fan which can separate the impeller from the shell and then clean them one by one.

[0007] The pull-out type centrifugal fan comprises a shell, a sliding seat slidingly connected to one side of the shell, an impeller rotationally connected to the sliding seat, and an impeller motor fixedly connected to the sliding seat and used for driving the impeller to rotate.

[0008] A cleaning mechanism for cleaning the shell and the impeller is slidingly connected between the shell and the sliding seat, the cleaning mechanism comprises a cleaning cover slidingly connected to one side of the shell, a rotating ring rotationally connected to the cleaning cover and parallel to the rotation axis of the impeller, and a cleaning ring slidingly connected to the rotating ring in the axial direction of the rotating ring.

[0009] The cleaning ring is provided with cleaning parts uniformly along the circumference.

[0010] As a further improvement of the present application, the cleaning part comprises a cleaning seat and a cleaning strip with elasticity uniformly installed on the cleaning seat.

[0011] As a further improvement of the present application, the cleaning cover is in the shape of "C"; the upper and lower sides of the cleaning cover are respectively rotatably connected with a rotating shaft and a closing cover parallel to the rotating shaft of the impeller.

[0012] As a further improvement of the present application, the cleaning cover is slidably connected with a cover pushing rod parallel to the cleaning cover in sliding direction, which is used to push the closing cover to rotate; a damping spring is installed between the cover pushing rod and the closing cover to hinder the movement of the cover pushing rod.

[0013] As a further improvement of the present application, one side of the shell is rotatably connected with a driving wheel, which drives the movement of the sliding seat and the cover pushing rod.

[0014] As a further improvement of the present application, the side wall of the cleaning cover is provided with a filter pipe; a fan is fixedly connected in the filter pipe; a filter screen is arranged between the fan and the cleaning cover in the filter pipe.

[0015] As a further improvement of the present application, the cleaning mechanism further comprises a plurality of connecting assemblies uniformly arranged along the circumference of the rotating ring; the connecting assembly comprises a sliding rod; one side of the sliding rod is slidably connected with the rotating ring along the radius direction of the rotating ring, and the other side of the sliding rod is rotatably connected with the cleaning ring, and the rotating shaft is perpendicular to the rotating shaft of the impeller.

[0016] As a further improvement of the present application, the cleaning mechanism further comprises a driving sleeve coaxially rotatably connected with the rotating ring; one end of the driving sleeve is uniformly provided with a plurality of driving inclined grooves along the circumference, which drive the movement of the sliding rod.

[0017] As a further improvement of the present application, one end of the sliding rod away from the cleaning ring is provided with a deflection resisting plate; the connecting assembly further comprises two deflection sliding blocks radially sliding along the rotating ring; one end of each deflection sliding block close to the cleaning ring is fixedly connected with a deflection spring capable of resisting the deflection resisting plate.

[0018] As a further improvement of the present application, a plurality of pressure chambers and cleaning chambers are uniformly arranged along the circumference of the cleaning ring along the radius direction of the rotating ring; each pressure chamber and cleaning chamber is in communication with each other; the cleaning part is sealingly slidably connected in the cleaning chamber; a piston body is sealingly slidably connected in the pressure chamber; the sliding rod is provided with a pressing column driving the movement of the piston body.

[0019] Compared with the prior art, the beneficial effects of the present application are that: the present scheme separates the impeller and the shell by moving the sliding seat, which facilitates subsequent cleaning of the impeller and the shell respectively.

[0020] The present scheme moves the cleaning ring in different directions, so that the cleaning ring can clean the shell and the impeller.

[0021] The present scheme controls the rotation of the drive sleeve, so that the drive sleeve can control the axial movement of the cleaning ring into the shell or the impeller, and can also drive the cleaning ring to rotate circumferentially for cleaning.

[0022] The present scheme controls the movement of the cover push rod, so that the cover push rod can drive the cleaning cover to move to be directly opposite the impeller, and can also control the rotation of the closed cover, so that the closed cover and the cleaning cover enclose the impeller in a space, avoiding the scattering of the knocked-off dust.

[0023] The sliding rod of the present scheme can not only drive the axial movement of the cleaning ring, but also drive the movement of the piston body to make the cleaning strip move to the outside of the cleaning ring, and can also drive the rotation of the deflection frame, so that the cleaning ring has the tendency to move in different directions. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The present application is a structural schematic diagram;

[0025] Figure 2 , Figure 3 The present application is an exploded structural schematic diagram;

[0026] Figure 4 The present application is an exploded structural schematic diagram of the cleaning mechanism.

[0027] Figure 5 The present application is a structural schematic diagram of the connecting assembly.

[0028] Figure 6 The present application is a structural schematic diagram of the rotating ring, the cleaning ring and the drive sleeve.

[0029] Figure 7 The present application is a cross-sectional structural schematic diagram of the cleaning mechanism.

[0030] Figure 8 The present application is a structural schematic diagram in the initial state.

[0031] Figure 9 The present application is a structural schematic diagram when the cleaning ring is located at the right limit position.

[0032] Figure 10 The present application is a structural schematic diagram when the cleaning ring has the tendency to move to the left side.

[0033] Figure 11The structure schematic diagram of the cleaning ring when the cleaning ring is located at the left limit position.

[0034] Figure 12 、 Figure 13 The structure schematic diagram of the driving wheel.

[0035] Figure 14 The structure schematic diagram of the cleaning ring when the cleaning ring is cleaning the impeller.

[0036] The figure label explanation:

[0037] 1, the shell; 11, the air inlet; 12, the air outlet; 13, the slide rail; 131, the sliding connection plate; 14, the positioning port; 15, the driving motor; 16, the driving wheel; 161, the upper gear; 162, the lower notch; 163, the lower gear; 164, the upper notch; 2, the sliding seat; 21, the impeller; 22, the impeller motor; 23, the seat rack; A, the cleaning mechanism; 30, the fan; 31, the cleaning cover; 311, the filter pipe; 32, the closed cover; 321, the cover connecting plate; 322, the cover sliding groove; 33, the connecting frame; 331, the frame rack; 34, the cover push rod; 35, the damping spring; 36, the transmission shaft; 4, the rotating ring; 41, the rod sliding rail; 42, the positioning plate; 5, the driving sleeve; 51, the friction ring; 52, the driving chute; 6, the cleaning ring; 61, the pressure chamber; 62, the cleaning chamber; 63, the air pipe; 64, the rotating seat; 71, the sliding rod; 711, the deflection head; 712, the pressing column; 713, the deflection resisting plate; 72, the connecting part; 73, the deflection frame; 731, the first deflection rod; 732, the second deflection rod; 733, the deflection sliding groove; 74, the sliding body; 741, the deflection connecting column; 742, the deflection pressing head; 75, the deflection sliding block; 751, the deflection spring; 76, the piston body; 761, the piston resisting plate; 77, the piston spring; 78, the cleaning part; 781, the cleaning seat; 782, the cleaning strip. DETAILED DESCRIPTION

[0038] Specific embodiment one: please refer to Figures 1-14 A pull-out type centrifugal fan, comprising a shell 1, a sliding seat 2 slidingly connected to one side of the shell 1, an impeller 21 rotatingly connected to the sliding seat 2, and an impeller motor 22 fixedly connected to the sliding seat 2 and driving the impeller 21 to rotate.

[0039] The shell 1 is provided with an air inlet 11 and an air outlet 12; the sliding direction of the sliding seat 2 is parallel to the rotation axis direction of the impeller 21; the side wall of the shell 1 close to the sliding seat 2 is provided with a positioning port 14 for the impeller 21 to enter and exit the shell 1; and the lower end of the shell 1 is provided with a slide rail 13 slidingly connected to the sliding seat 2.

[0040] The cleaning mechanism A is slidably connected between the shell 1 and the sliding seat 2 for cleaning the shell 1 and the impeller 21; the cleaning mechanism A comprises a cleaning cover 31 slidably connected to one side of the shell 1, a rotating ring 4 rotatably connected in the cleaning cover 31 and parallel to the rotating shaft of the impeller 21, and a cleaning ring 6 axially slidably connected to the rotating ring 4.

[0041] The cleaning ring 6 is uniformly provided with cleaning portions 78 in the circumferential direction.

[0042] When the sliding seat 2 is located at the limit position close to the shell 1, the impeller 21 is located inside the shell 1 through the positioning opening 14, at this time, the impeller motor 22 drives the impeller 21 to work, air enters from the air inlet 11 and exits from the air outlet 12.

[0043] When the sliding seat 2 is located at the limit position away from the shell 1, the impeller 21 is separated from the shell 1, and the cleaning ring 6 is inserted into the interval between the impeller 21 and the shell 1, at this time, the cleaning cover 31 drives the rotating ring 6 to move to be opposite to the impeller 21, and the cleaning ring 6 can move into the impeller 21 or the shell 1 to clean the impeller 21 and the shell 1.

[0044] The cleaning portion 78 comprises a cleaning seat 781 and elastic cleaning strips 782 uniformly arranged on the cleaning seat 781.

[0045] The cleaning strip 782 is composed of an elastic rope, when the cleaning ring 6 rotates in the circumferential direction, the cleaning strip 782 is elongated under the action of centrifugal force and contacts the surface of the shell 1 or the impeller 21 to knock off the dust on the surface, since the cleaning strip 782 is elastic and soft, it will not damage the surface of the shell 1 and the impeller 21 to cause scratches.

[0046] The cleaning cover 31 is in the shape of "C"; the upper and lower sides of the cleaning cover 31 are respectively rotatably connected with closed covers 32 parallel to the rotating shaft of the impeller 21.

[0047] When the two closed covers 32 are separated, the impeller 21 can enter the cleaning cover 31 through the interval between the two closed covers 32.

[0048] When the two closed covers 32 abut, the cleaning cover 31 and the two closed covers 32 form a circular cleaning sleeve, and the impeller 21 and the positioning opening 14 are wrapped in the cleaning sleeve, which facilitates the work of the cleaning ring 6.

[0049] The cleaning cover 31 is slidably connected with a cover pushing rod 34 for pushing the closed cover 32 to rotate, the sliding direction of the cover pushing rod 34 is parallel to the cleaning cover 31; a damping spring 35 is arranged between the cover pushing rod 34 and the closed cover 32 to hinder the movement of the cover pushing rod 34.

[0050] The outer wall of the closing cover 32 is provided with a cover connecting plate 321; one end of the cover connecting plate 321 is provided with a cover sliding groove 322 radially arranged along the closing cover 32, which is parallel to the rotating shaft of the impeller 21; and the cover push rod 34 is provided with a cover sliding column which is slidingly connected with the cover sliding groove 322.

[0051] One side of the sliding rail 13 is provided with a sliding connecting plate 131 below the cleaning mechanism A; the upper end of the sliding connecting plate 131 is provided with a stop plate; when the cleaning cover 31 moves to the direction of the sliding seat 2 and abuts against the stop plate, the cleaning cover 31 cannot continue to move, and the cleaning cover 31 is opposite to the impeller 21 at this time.

[0052] When the cover push rod 34 moves to the direction of the sliding seat 2, the cover push rod 34 cannot push the closing cover 32 to rotate due to the limitation of the damping spring 35, and at this time the cover push rod 34 drives the closing cover 32 and the cleaning cover 31 to move to the direction of the sliding seat 2; when the cleaning cover 31 abuts against the stop plate, the cleaning cover 31 cannot move, and at this time the cover push rod 34 moves, forcing the damping spring 35 to compress, the cover push rod 34 pushes the cover sliding groove 322, so that the closing cover 32 rotates until the two closing covers 32 abut against each other.

[0053] One side of the shell 1 is rotatably connected with a driving wheel 16 which drives the sliding seat 2 and the cover push rod 34 to move.

[0054] The driving wheel 16 comprises an upper gear 161 and a lower gear 163 coaxially arranged below the upper gear 161; the sliding seat 2 is provided with a seat rack 23 which is drivingly connected with the lower gear 163 along the sliding direction; the cover push rod 34 is fixedly connected with a connecting frame 33; and the connecting frame 33 is provided with a frame rack 331 which is engaged with the upper gear 161 along the sliding direction.

[0055] The upper gear 161 is provided with an upper notch 164 which does not drivingly engage with the frame rack 331; and the lower gear 163 is provided with a lower notch 162 which does not drivingly engage with the seat rack 23.

[0056] One side of the shell 1 is fixedly connected with a driving motor 15 which drives the driving wheel 16 to rotate.

[0057] In the initial state, the impeller 21 is located in the shell 1, and the cleaning cover 31 is located away from the sliding seat 2; at this time, the lower gear 163 engages with the seat rack 23, and the upper notch 164 is opposite to the frame rack 331.

[0058] Then the driving motor 15 works to drive the driving wheel 16 to rotate, the lower gear 163 drives the seat rack 23 to move, so that the sliding seat 2 moves away from the shell, and at the same time the driving wheel 16 does not drive the frame rack 331 to move.

[0059] When the driving wheel 16 rotates to the upper notch 164 is separated from the rack 331 of the frame body, the upper gear 161 is engaged with the rack 331 of the frame body, the sliding seat 2 has moved a certain distance, and the distance between the impeller 21 and the shell 1 is greater than the width of the rotating ring 4, so that the cleaning mechanism A moves without colliding with the impeller 21.

[0060] The driving wheel 16 continues to rotate, the upper gear 161 drives the rack 331 of the frame body to move, so that the cover push rod 34 drives the cleaning cover 31 to move towards the sliding seat 2, the lower gear 163 drives the rack 23 of the seat body to continue to move, the sliding seat 2 continues to move away from the shell 1, until the driving wheel 16 rotates to the lower gear 163 is separated from the rack 23 of the seat body, the lower notch 162 is opposite to the rack 23 of the seat body, and then the sliding seat 2 no longer moves, the driving wheel 16 only drives the cover push rod 34 to move through the upper gear 161, and finally the cover push rod 34 makes the two closed covers 32 contact each other, and the cleaning cover 31 wraps the impeller 21 inside, facilitating subsequent cleaning.

[0061] The side wall of the cleaning cover 31 is provided with a filter pipe 311; the fan 30 is fixedly connected in the filter pipe 311; and a filter screen is arranged between the fan 30 and the cleaning cover 31 in the filter pipe 311.

[0062] When the fan 30 works, the fan 30 draws the gas in the cleaning cover 31, so that the dust falling from the shell 1 and the impeller 21 enters the filter pipe 311 along with the gas and is retained on the filter screen.

[0063] The cleaning mechanism A further comprises a plurality of connection assemblies uniformly arranged along the circumference of the rotating ring 4; the connection assembly comprises a sliding rod 71; one side of the sliding rod 71 is slidingly connected to the rotating ring 4 along the radius direction of the rotating ring 4; the other side of the sliding rod 71 is rotationally connected to the cleaning ring 6, and the rotation shaft is perpendicular to the rotation shaft of the impeller 21.

[0064] The cleaning mechanism A further comprises a driving sleeve 5 coaxially rotationally connected with the rotating ring 4; one end of the driving sleeve 5 is uniformly provided with a plurality of driving inclined grooves 52 for driving the sliding rod 71 to move.

[0065] The inner wall of the rotating ring 4 is uniformly provided with a plurality of rod body sliding rails 41 distributed along the radius direction; the sliding rod 71 is slidingly connected in the rod body sliding rail 41; the outer wall of the cleaning ring 6 is provided with a plurality of rotating seats 64; one end of the sliding rod 71 in the cleaning ring 6 is rotationally connected with the rotating seat 64.

[0066] The sliding rod 71 is rotatably connected to a connecting part 72 on the side away from the cleaning ring 6; the connecting part 72 slides along the radial direction of the rotating ring 6; the connecting part 72 is slidably connected in the driving groove 52; when the driving sleeve 5 rotates relative to the rotating ring 4, the driving groove 52 drives the connecting part 72 to slide along the radial direction of the rotating ring 4, and thus the end of the sliding rod 71 away from the cleaning ring 6 slides synchronously along the radial direction of the rotating ring 4.

[0067] When the connecting part 72 slides toward the center of the rotating ring 4, the connecting part 72 forces the sliding rod 71 to slide synchronously and rotate, causing the cleaning ring 6 to move toward the outer casing 1 or the impeller 21.

[0068] The sliding rod 71 is provided with a deflection plate 731 at the end away from the cleaning ring 6; the connecting assembly also includes two deflection sliders 75 that slide radially along the rotating ring 4. Each deflection slider 75 is fixedly connected to a deflection spring 751 at the end near the cleaning ring 6, which can abut against the deflection plate 731.

[0069] Two deflection sliders 75 are arranged along the axis of the rotating ring 4 and are located on both sides of the sliding rod 71 near the end of the rotating ring 4, that is, on both sides of the rod slide rail 41.

[0070] The connecting assembly also includes a sliding body 74 that slides along the axis of the rotating ring 4; the sliding body 74 is provided with two deflection pressing heads 742 for driving the deflection slider 75 to move in the direction of the cleaning ring 6; one deflection pressing head 742 cooperates with one deflection slider 75; at the same time, only one deflection pressing head 742 keeps the corresponding deflection slider 75 in a position close to the cleaning ring 6. At this time, if the corresponding deflection spring 751 abuts against the deflection abutment 731 and generates a thrust, while the other deflection spring 751 does not generate a thrust on the deflection abutment 731, the sliding rod 71 is forced to have a tendency to deflect in the direction of the impeller 21 or the housing 1.

[0071] In the initial state (e.g.) Figure 8 As shown), each sliding rod 71 coincides with the radius of the rotating ring 4, and at this time, the deflection slider 75 on the left is located close to the cleaning ring 6 under the action of the deflection pressure head 742. The deflection spring 751 on the left is compressed, generating a thrust on the deflection abutment 731. As a result, the sliding rod 71 tends to rotate to the right, and the cleaning ring 6 tends to move to the right. If the drive sleeve 5 rotates relative to the rotating ring 4 at this time, the drive groove 52 drives the connecting part 72 to move towards the cleaning ring 6, the sliding rod 71 rotates to the right, and the cleaning ring 6 moves to the right.

[0072] The inner wall of the rotating ring 4 is uniformly provided with multiple positioning plates 42 along the circumference; the deflection slider 75 is slidably connected to the positioning plate 42; the sliding body 74 is slidably connected to the positioning plate 42.

[0073] The connecting assembly further comprises a deflection frame 73 of the rotating shaft which is rotationally connected in the rotating ring 4 and is perpendicular to the rotating shaft of the cleaning ring; the upper part of the deflection frame 73 is provided with a deflection sliding groove 733 along the radial direction of the deflection frame 73; the sliding body 74 is provided with a deflection connecting column 741 which is in sliding connection with the deflection sliding groove 733; when the deflection frame 73 rotates, the deflection sliding groove 733 drives the deflection connecting column 741 to move, and then the sliding body 74 slides.

[0074] The lower part of the deflection frame 73 is provided with a first deflection rod 731 and a second deflection rod 732; the lower part of the sliding rod 71 is provided with a deflection head 711 which can abut against the first deflection rod 731 or the second deflection rod 732 to drive the deflection frame 73 to rotate.

[0075] As shown in Figure 8 , the second deflection rod 732 is close to the deflection head 711, and the first deflection rod 731 is away from the deflection head 711 and is higher than the deflection head 711; at this time, the driving sleeve 5 rotates relative to the rotating ring 4, the cleaning ring 6 moves to the right side, the sliding rod 71 deflects to the right side, and then the deflection head 711 on the sliding rod 71 moves to the right side synchronously, the deflection head 711 abuts against the second deflection rod 732 and drives the second deflection rod 732 to rotate, and then the deflection frame 73 rotates, the deflection sliding groove 733 drives the sliding body 74 to move to the left side, the second deflection rod 732 moves away from the cleaning ring 6 synchronously when moving to the right side, and then the second deflection rod 732 gradually separates from the deflection head 711, and the first deflection rod 731 gradually approaches the deflection head 711; finally, the second deflection rod 732 moves to the position above the deflection head 711, the deflection head 711 separates from the second deflection rod 732, the sliding body 74 moves to the left limit position, the left deflection sliding block 75 separates from the deflection downward pressing head 742, and the right deflection sliding block 75 abuts against the deflection downward pressing head 742; then the driving sleeve 5 continues to rotate, and the cleaning ring 6 moves to the right limit position (as shown in Figure 9 ) and then is inserted into the shell 1.

[0076] When the driving sleeve 5 reversely rotates, the movement of the deflection head 711 will not contact the second deflection rod 732 when the cleaning ring 6 moves from the right limit position to the rotating ring 4; when the cleaning ring 6 moves from the right limit position to the rotating ring 4, the sliding rod 71 coincides with the radius of the rotating ring 4, the deflection head 711 abuts against the first deflection rod 731, the right deflection spring 751 contacts the deflection abutting plate 713 and is extruded, so that the sliding rod 71 has a tendency to rotate to the left side, and the cleaning ring 6 has a tendency to move to the left side.

[0077] The cleaning ring 6 is uniformly provided with a plurality of pressure chambers 61 and cleaning chambers 62 along the radial direction of the rotating ring 4 along the circumference; each of the pressure chambers 61 and the cleaning chambers 62 are in communication with each other; the cleaning part 78 is sealingly and slidingly connected in the cleaning chamber 62; the piston body 76 is sealingly and slidingly connected in the pressure chamber 61; the sliding rod 71 is provided with a pressing column 712 for driving the piston body 76 to move.

[0078] The piston body 76 is provided with a piston abutting plate 761 extending to the outside of the pressure chamber 61 and capable of abutting against the pressing column 712; the pressure chamber 61 and the cleaning chamber 62 are in communication through the air pipe 63; the cleaning seat 781 is sealingly and slidingly connected in the cleaning chamber 62; the piston spring 77 is arranged between the piston body 76 and the pressure chamber 61 for driving the piston body 76 to reset.

[0079] When the sliding rod 71 drives the cleaning ring 6 to move along the axis of the rotating ring 4, the pressing column 712 generates pressure on the piston abutting plate 761, so that the piston body 76 moves to the inside of the cleaning ring 6, the gas in the pressure chamber 61 enters the cleaning chamber 62 under the action of the pressure, and the cleaning part 78 moves to the outside of the cleaning ring 6, and finally the cleaning strip 782 is located outside the cleaning ring 6.

[0080] The cleaning cover 31 is rotationally connected with a transmission shaft 36 parallel to the impeller 21; the outer periphery of the driving sleeve 5 is coaxially provided with a friction ring 51 extending to the outside of the cleaning cover 31 and in transmission connection with the transmission shaft 36; the cleaning cover 31 is rotationally connected with a transmission wheel in transmission connection with the transmission shaft 36 and capable of being in transmission connection with the impeller 21; when the cleaning cover 31 moves to a position close to the sliding seat 2, the transmission wheel abuts against the outer wall of the impeller 21, and then when the impeller rotates, the impeller 21 drives the driving sleeve 5 to rotate through the transmission wheel and the transmission shaft 36, and the driving sleeve 5 rotates in the opposite direction of the impeller 21.

[0081] When the driving sleeve 5 rotates, the driving sleeve 5 first drives the connecting part 72 to move, so that the cleaning ring 6 moves axially, and when the cleaning ring 6 moves axially to the limit position, the driving sleeve 5 continues to rotate, and the driving sleeve 5 drives the cleaning ring 6 and the rotating ring 4 to rotate synchronously.

[0082] In the initial state, the impeller 21 is located in the shell 1, and the cleaning cover 31 is located away from the sliding seat 2, at this time, the lower gear 163 is in meshing with the rack 23 of the seat body, the upper notch 164 is opposite to the rack 331 of the frame body, each sliding rod 71 coincides with the radius of the rotating ring 4, and at this time, the left deflection sliding block 75 is located close to the cleaning ring 6 under the action of the deflection pressing head 742, the left deflection spring 751 is compressed, and a pushing force is generated on the deflection abutting plate 731, and the cleaning ring 6 has a tendency to move to the right side.

[0083] The rotation ring 4 has a large friction with the cleaning cover 31, and then drives the sleeve 5 to rotate, which first drives the sliding rod 71 to move, and then drives the rotation ring 4 to rotate.

[0084] When the impeller 21 works, the air outside is sucked from the air inlet 11 and is sent from the air outlet 12.

[0085] When the impeller 21 needs to be cleaned, the driving motor 15 drives the driving wheel 16 to rotate, so that the sliding seat 2 and the cover body push rod 34 move, and finally the impeller 21 is enclosed between the cleaning cover 31 and the closing cover 32.

[0086] Then the impeller 21 rotates, and drives the sleeve 5 to rotate through the transmission shaft 36, the sleeve 5 first rotates relative to the rotation ring 4, the driving chute 52 drives the connecting part 72 to move to the cleaning ring 6 direction, and then the sliding rod 71 is deflected to the right under the action of the deflection spring 751 on the left side, the cleaning ring 6 moves to the right side, and gradually passes through the positioning port 14 into the shell 1.

[0087] With the movement of the cleaning ring 6 to the right side, the deflection head 711 drives the second deflection rod 732 to rotate, so that the sliding body 74 moves to the left side, and finally the deflection sliding block 75 on the right side moves to the position close to the cleaning ring 6 under the action of the deflection lower pressing head 742, the first deflection rod 731 moves to the opposite side of the deflection head 711, and the lower pressing column 712 is in abutment with the piston resisting plate 761, so that the piston body 76 moves, and each cleaning part 78 moves to the outside of the cleaning ring 6.

[0088] When the cleaning ring 6 moves to the right limit position, the cleaning ring 6 completely enters the shell 1, the cleaning strip 782 completely leaves the cleaning chamber 62, and the impeller 21 continues to rotate, and the sleeve 5 drives the rotation ring 4 and the cleaning ring 6 to rotate synchronously in the circumferential direction, and each cleaning strip 781 is elongated under the action of the centrifugal force, contacts the inner wall of the shell 1 and sucks the inner wall of the shell 1, and knocks off the dust attached to the inner wall of the shell 1, and at the same time, the fan 30 works, and the knocked-off dust is gathered on the filter screen with the air.

[0089] After a certain period of time, the shell 1 is cleaned, the impeller 21 reversely rotates, and then the sleeve 5 reversely rotates, the driving chute 52 drives the connecting part 72 to move away from the cleaning ring 6, and the cleaning ring 6 moves to the left side under the action of the sliding rod 71, and finally the sliding rod 71 is parallel to the radius direction of the rotation ring 4, and the cleaning ring 6 moves to the inside of the rotation ring 4, at this time, the deflection spring 751 on the right side acts on the deflection resisting plate 713, so that the cleaning ring 6 has a tendency to move to the left side, in this process, the lower pressing column 712 is separated from the piston resisting plate 761, the piston spring 77 pushes the piston body 76 to reset, and the cleaning part 78 moves to the inside of the cleaning ring 6, and finally each cleaning part 78 is stored in the cleaning chamber 62.

[0090] Then the impeller 21 rotates, the drive sleeve 5 rotates, the drive sleeve 5 first drives the sliding rod 71 to move, at this time the sliding rod 71 deflects to the left side, and then the cleaning ring 6 moves to the left side.

[0091] In the process of the sliding rod 71 deflecting to the left side, the deflection head 711 abuts against the first deflection rod 731, and the deflection frame 73 rotates, and then the sliding body 74 moves to the right side, and finally the left deflection sliding block 75 moves to the position close to the cleaning ring 6 under the action of the deflection lower head 742, and the lower pressing column 712 drives the piston body 76 to move, and each cleaning strip 782 moves to the outside of the cleaning chamber 62, and finally the cleaning ring 6 moves to the left limit position, and the cleaning ring 6 moves to the inside of the impeller 21.

[0092] Then the impeller 21 continues to rotate, the drive sleeve 5 drives the rotating ring 4 and the cleaning ring 6 to rotate synchronously, because the rotating direction of the impeller 21 and the drive sleeve 5 is opposite, and then the cleaning strip 782 and the impeller 21 move in opposite directions, the cleaning strip 782 cleans the impeller 21, and the dust knocked off is gathered on the filter screen under the action of the fan 30.

[0093] After a certain time, the impeller 21 is cleaned, the impeller 21 reversely rotates, the drive sleeve 5 reversely rotates, the cleaning ring 6 moves to the right side, and finally the sliding rod 71 moves to be parallel to the radius of the rotating ring 4, and the cleaning strip 782 is stored in the cleaning chamber 62.

[0094] Then the drive motor 15 drives the drive wheel 16 to reversely rotate, and finally returns to the initial state.

Claims

1. A pull-out centrifugal fan, characterized in that: Includes a housing (1), a sliding seat (2) slidably connected to one side of the housing (1), an impeller (21) rotatably connected to the sliding seat (2), and an impeller motor (22) fixedly connected to the sliding seat (2) to drive the impeller (21) to rotate. A cleaning mechanism (A) for cleaning the housing (1) and the impeller (21) is slidably connected between the housing (1) and the sliding seat (2); the cleaning mechanism (A) includes a cleaning cover (31) slidably connected to one side of the housing (1), a rotating ring (4) rotatably connected to the cleaning cover (31) and parallel to the axis of rotation of the impeller (21), and a cleaning ring (6) slidably connected to the rotating ring (4) along the axis of rotation of the rotating ring (4); The cleaning ring (6) is uniformly provided with cleaning parts (78) along the circumferential direction. The cleaning mechanism (A) further includes a plurality of connecting components evenly arranged around the circumference of the rotating ring (4); the connecting components include a sliding rod (71); one side of the sliding rod (71) is slidably connected to the rotating ring (4) along the radial direction of the rotating ring (4), and the other side of the sliding rod (71) is rotatably connected to the cleaning ring (6), and the axis of rotation is perpendicular to the axis of rotation of the impeller (21); The cleaning mechanism (A) also includes a drive sleeve (5) that is rotatably connected to the rotating ring (4) on the same axis; one end of the drive sleeve (5) is uniformly provided with a drive groove (52) that drives the sliding rod (71) to move along the circumferential direction. The sliding rod (71) is provided with a deflection plate (731) at the end away from the cleaning ring (6); the connecting assembly also includes two deflection sliders (75) that slide radially along the rotating ring (4). Each of the deflection sliders (75) is fixedly connected to a deflection spring (751) that can abut against the deflection plate (731) at the end near the cleaning ring (6).

2. A pull-out centrifugal fan according to claim 1, characterized in that: The cleaning unit (78) includes a cleaning seat (781) and elastic cleaning strips (782) evenly installed on the cleaning seat (781).

3. A pull-out centrifugal fan according to claim 1, characterized in that: The cleaning cover (31) is C-shaped; the upper and lower sides of the cleaning cover (31) are respectively connected to a closed cover (32) with a rotating shaft parallel to the rotating shaft of the impeller (21).

4. A pull-out centrifugal fan according to claim 3, characterized in that: The cleaning cover (31) is slidably connected to a cover push rod (34) that slides parallel to the cleaning cover (31) and is used to push the closed cover (32) to rotate; a damping spring (35) is installed between the cover push rod (34) and the closed cover (32) to impede the movement of the cover push rod (34).

5. A pull-out centrifugal fan according to claim 4, characterized in that: The outer shell (1) is rotatably connected to a drive wheel (16) that drives the sliding seat (2) and the cover push rod (34) to move.

6. A pull-out centrifugal fan according to claim 1, characterized in that: The cleaning cover (31) has a filter tube (311) on its side wall; a fan (30) is fixedly connected inside the filter tube (311); and a filter screen is provided inside the filter tube (311) between the fan (30) and the cleaning cover (31).

7. A pull-out centrifugal fan according to claim 1, characterized in that: The cleaning ring (6) is uniformly provided with multiple pressure chambers (61) and cleaning chambers (62) distributed along the radius of the rotating ring (4) in the circumferential direction; each pressure chamber (61) and cleaning chamber (62) is interconnected; the cleaning part (78) is sealed and slidably connected in the cleaning chamber (62); a piston body (76) is sealed and slidably connected in the pressure chamber (61); a downward pressure column (712) for driving the piston body (76) to move is provided on the sliding rod (71).

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