A dust collection fan with a dust collection bag convenient to clean

Abstract

The utility model belongs to dust absorption technical field, concretely is a kind of dust absorption fan of dust collection bag for easy cleaning, including dust absorption box;The dust absorption box end portion is fixedly connected with air outlet pipe;The dust absorption box end portion is equipped with dust absorption cover by installation component;The dust absorption cover is set in the end away from air outlet pipe;Dust inlet pipe is installed in the middle of dust absorption cover;Motor is installed in the dust absorption box;Two impellers are fixedly connected in the motor output end;First dust collection bag is fixedly connected in the middle of dust absorption cover;The first dust collection bag is arranged in the dust absorption box;One of the impellers is fixedly connected with two threaded brushes near the side of first dust collection bag;Two threaded brushes are oppositely arranged;Threaded brush middle is fixedly connected with connecting rope;Through the above structure, dust and impurities adhering to the surface of first dust collection bag can be cleaned in time, and the blockage problem caused by excessive accumulation of dust on the sidewall inside first dust collection bag can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to dust absorption technical field, specifically a kind of dust absorption fan of dust bag of convenient cleaning. BACKGROUND

[0002] Dust absorption fan is a kind of equipment for producing powerful airflow to adsorb dust and dirt, to realize cleaning effect.

[0003] In prior art, dust absorption fan is internally installed with motor, is powered by power supply to drive impeller to rotate at high speed, impeller generates strong suction force by high-speed rotation, dust absorption fan has two main air ducts, one is used for air to enter, one is used for discharge, when motor starts and drives impeller to begin to rotate, negative pressure area is generated in fan interior, under the action of negative pressure, air and dust are inhaled into fan interior, dust absorption fan is internally provided with filtering dust bag, for filtering small dust and particulate matter in the air entering fan.

[0004] Dust absorption fan is inhaled dust and dirt into the surface inside dust bag by strong suction force, when dust and particulate matter in air are more and larger, dust bag surface is easily blocked, leading to that dust bag breathability drops when using, cause dust absorption fan suction force to weaken and dust absorption efficiency to reduce, to cause cleaning effect to drop.

[0005] Therefore, the utility model provides a kind of dust absorption fan of dust bag of convenient cleaning. UTILITY MODEL CONTENT

[0006] To make up for the deficiencies of the prior art, solve at least one technical problem raised in the background art.

[0007] The utility model solves its technical problem adopts the technical scheme: A kind of dust collection fan of convenient cleaning dust collection bag of the utility model, including dust collection box;The dust collection box end portion is fixedly connected with air outlet pipe;The dust collection box end portion is installed with dust collection cover by mounting assembly;The dust collection cover is set in the end away from air outlet pipe;Dust inlet pipe is installed in the middle of the dust collection cover;Motor is installed in the dust collection box;Two impellers are fixedly connected in the motor output end;First dust collection bag is fixedly connected in the middle of the dust collection cover;The first dust collection bag is set in the dust collection box;One of the impellers is fixedly connected with two threaded brushes near the side of first dust collection bag;Two threaded brushes are oppositely arranged;Threaded brush middle part is fixedly connected with connecting rope;First magnetic block is fixedly connected in the end of connecting rope;Two second magnetic blocks are fixedly connected on the outer wall of the first dust collection bag;Two second magnetic blocks are oppositely arranged;First magnetic block and second magnetic block are attracted when being close;Through the above structure, dust and impurities attached to the surface of the first dust collection bag can be cleaned in time, the blockage problem caused by excessive accumulation of dust on the sidewall inside the first dust collection bag can be effectively reduced, the suction force and working efficiency during the working process of the dust collection box can be effectively reduced, the dust collection box can always maintain the best dust collection effect and state, the threaded brush is closely attached to the surface of the first dust collection bag, and the dust and impurities attached to the surface of the first dust collection bag are effectively cleaned.

[0008] Preferably, the mounting assembly includes a mounting slot;A plurality of mounting slots are provided in the end portion of the dust collection box;The middle part of the dust collection cover is fixedly connected with a fixing rod;A plurality of clamping blocks are hingedly connected to the end portion of the fixing rod;The plurality of clamping blocks are equidistantly distributed;A screw rod is threadedly connected to the middle part of the fixing rod;Through the above structure, the first dust collection bag can be easily taken out from the inside of the dust collection box, the dust and impurities collected inside the first dust collection bag can be conveniently cleaned subsequently, the appropriate first dust collection bag can be selected for installation according to different dust collection needs and working environments, the size and shape of the first dust collection bag can be flexibly adjusted to adapt to different dust collection needs, and the disassembled first dust collection bag can be cleaned in a suitable space and a convenient operating environment, thereby effectively improving the thoroughness and efficiency of cleaning.

[0009] Preferably, the middle part of the dust collection cover is fixedly connected with two air inlet pipes;Two air inlet pipes are oppositely arranged;Two air inlet pipes are penetrated through the sidewall of the first dust collection bag;Two air inlet pipes are fixedly connected with annular pipes at the end portions;A plurality of air outlet holes are formed in the middle part of the annular pipe;Through the above structure, the dust on the surface of the first dust collection bag can be quickly and effectively cleaned, the dust inside the first dust collection bag can be effectively reduced, the resistance of the dust collection bag can be effectively reduced, the suction force and working efficiency of the dust collection box can be effectively reduced, and the first dust collection bag can maintain stable filtering efficiency.

[0010] Preferably, the two connecting blocks are oppositely arranged, the middle part of the connecting block is inserted with a fixed plate, the middle part of the fixed plate and the connecting block is provided with a groove, the end of the groove is fixedly connected with a spring, the end of the spring is fixedly connected with a fixed block, and the end of the fixed plate is fixedly connected with a second dust collecting bag.

[0011] Preferably, a plurality of air outlet holes are arranged near the first dust collecting bag, and a filter screen is arranged in the middle part of the air outlet hole.

[0012] Preferably, the middle part of the dust suction cover is threadedly connected with a threaded shaft, and the end of the dust inlet pipe is fixedly connected in the middle part of the threaded shaft.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The dust suction fan with the dust collecting bag convenient to clean can clean the dust and impurities attached to the surface of the first dust collecting bag in time, effectively reduces the blockage problem caused by the excessive accumulation of dust on the side wall of the first dust collecting bag, effectively reduces the suction force and working efficiency of the dust suction box during the working process, can make the dust suction box always maintain the best dust suction effect and state, and effectively increases the cleaning of the dust and impurities attached to the surface of the first dust collecting bag.

[0015] 2.The dust collection fan with conveniently cleaned dust collection bag disclosed by the utility model, through the above structure, the first dust collection bag can be easily taken out from the dust collection box, the dust and impurities collected in the first dust collection bag can be conveniently cleaned, the first dust collection bag can be installed according to different dust collection requirements and working environments, the size and shape of the first dust collection bag can be flexibly adjusted, different dust collection requirements can be met, the first dust collection bag can be cleaned in a suitable space and in an environment convenient for operation, and the thoroughness and efficiency of cleaning are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described in connection with the drawings.

[0017] Figure 1 is the perspective view in the utility model;

[0018] Figure 2 is the sectional view of the dust collection box in the utility model;

[0019] Figure 3 is the structural schematic view of the annular pipe in the utility model;

[0020] Figure 4 is the utility model Figure 3 A enlarged view;

[0021] Figure 5 is the structural schematic view of the installation assembly in the utility model;

[0022] Figure 6 is the structural schematic view of the clamping block in the utility model;

[0023] In the drawing: 1, dust collection box; 10, air outlet pipe; 11, dust inlet pipe; 12, motor; 13, impeller; 14, dust collection cover; 15, first dust collection bag; 16, threaded brush; 17, connecting rope; 18, first magnetic block; 19, second magnetic block; 2, installation assembly; 21, installation slot; 22, fixed rod; 23, clamping block; 24, screw rod; 3, air inlet pipe; 31, annular pipe; 32, air outlet hole; 4, connecting block; 41, recess; 42, fixed plate; 43, spring; 44, fixed block; 45, second dust collection bag; 5, filter screen; 6, threaded shaft; 7, visual window. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model will be further described in connection with the specific implementation mode.

[0025] For example, Figures 1 to 5The utility model discloses a dust -collecting fan of convenient cleaning dust collection bag, including dust -collecting box 1, the dust -collecting box 1 end portion is fixedly connected with the air outlet pipe 10, the dust -collecting box 1 end portion is installed with dust -collecting lid 14 through the installation component 2, dust -collecting lid 14 is arranged in the one end away from air outlet pipe 10, the dust -collecting lid 14 middle part is installed with the dust inlet pipe 11, the dust -collecting box 1 inside is installed with motor 12, two impellers 13 are fixedly connected with the motor 12 output, the dust -collecting lid 14 middle part is fixedly connected with first dust bag 15, first dust bag 15 is arranged in the dust -collecting box 1 inside, one of the impeller 13 is fixedly connected with two threaded brushes 16 close to first dust bag 15 one side, two threaded brushes 16 are opposite and set up, threaded brush 16 middle part is fixedly connected with connecting rope 17, the connecting rope 17 end is fixedly connected with first magnetic block 18, first dust bag 15 outer lateral wall is fixedly connected with two second magnetic block 19, two second magnetic block 19 are opposite and set up, first magnetic block 18 and second magnetic block 19 are close to and attract each other,In operation, during the process of dust collection, first, the motor 12 inside the dust collection box 1 is powered on, the motor 12 drives the two impellers 13 to rotate through the current, the dust inlet pipe 11 is connected with the dust collection head, the dust collection head inhales the corresponding airflow through the motor 12, the airflow enters the inside of the dust collection box 1 through the dust inlet pipe 11, when the airflow passes through the middle part of the first dust collection bag 15, the dust and impurities in the airflow are connected through the first dust collection bag 15, the particulate matter dust and impurities are collected through the first dust collection bag 15, and the filtered purified airflow is discharged to the air outlet pipe 10 position through the first dust collection bag 15, at the same time, in the process of rotating the two impellers 13, the two threaded brushes 16 are driven to rotate, the threaded brush 16 is attached to the surface of the first dust collection bag 15, and the particulate matter attached to the inner wall of the first dust collection bag 15 is scraped in the process of rotating the threaded brush 16, when the threaded brush 16 rotates, the two first magnetic blocks 18 and the corresponding second magnetic blocks 19 are close, and are attracted and attached instantaneously, when the threaded brush 16 continues to rotate, the first magnetic blocks 18 and the second magnetic blocks 19 are separated instantaneously through the connecting rope 17, the second magnetic blocks 19 are shaken in the middle part of the first dust collection bag 15, the dust and particulate impurities flow in the inside of the first dust collection bag 15, through the above structure, the dust and impurities attached to the surface of the first dust collection bag 15 can be cleaned in time, the problem of blockage caused by too much dust accumulated on the side wall of the first dust collection bag 15 can be effectively reduced, the suction force and working efficiency of the dust collection box 1 during the working process can be effectively reduced, the dust collection box 1 can always maintain the best dust collection effect and state, the threaded brush 16 is closely attached to the surface of the first dust collection bag 15, the dust and impurities attached to the surface of the first dust collection bag 15 are effectively cleaned, the stable filtering performance of the first dust collection bag 15 during use can be effectively maintained, the airflow in the inside of the dust collection box 1 is unobstructed, the dust collection efficiency and suction force are effectively improved, the blockage and wear caused by the accumulation of dust and impurities on the surface of the first dust collection bag 15 is reduced, thereby effectively prolonging the service life of the first dust collection bag 15, reducing the frequent replacement and cost of the first dust collection bag 15 caused by wear.

[0026] As Figures 2 to 6As shown, the installation assembly 2 comprises a mounting groove 21; a plurality of mounting grooves 21 are opened at the end of the dust collection box 1; a fixed rod 22 is fixedly connected in the middle of the dust cover 14; a plurality of clamping blocks 23 are hingedly connected at the end of the fixed rod 22; a plurality of clamping blocks 23 are distributed equidistantly; a screw rod 24 is threadedly connected in the middle of the fixed rod 22; in working, when the first dust collection bag 15 is installed inside the dust collection box 1, first, a plurality of fixed rods 22 are inserted into the corresponding mounting grooves 21, and then one end of the screw rod 24 is rotated, when the screw rod 24 is rotated in the middle of the fixed rod 22 and moves outward at the same time, when one end of the screw rod 24 moves inside the mounting groove 21, it extrudes a plurality of clamping blocks 23, so that a plurality of clamping blocks 23 are opened, a plurality of clamping blocks 23 are opened and enter the corresponding groove, the dust cover 14 is clamped and fixed by a plurality of clamping blocks 23, so that the first dust collection bag 15 is fixed inside the dust collection box 1, when the first dust collection bag 15 is disassembled, the screw rod 24 is rotated in the opposite direction, so that the screw rod 24 moves inward, the connecting part of the clamping block 23 and the end of the fixed rod 22 is provided with a torsional spring, when the end of the screw rod 24 moves inward, a plurality of clamping blocks 23 are reset, so that the dust cover 14 is disassembled from the end of the dust collection box 1, through the above structure, the first dust collection bag 15 can be easily taken out from the inside of the dust collection box 1, which is convenient for subsequent cleaning of dust and impurities collected in the first dust collection bag 15, the appropriate first dust collection bag 15 can be selected for installation according to different dust collection needs and working environment, the size and shape of the first dust collection bag 15 can be flexibly adjusted, so as to adapt to different dust collection needs, the disassembled first dust collection bag 15 can be cleaned in a suitable space and an environment convenient for operation, which effectively improves the completeness and efficiency of cleaning.

[0027] As shown in Figures 2 to 4 , two air inlet pipes 3 are fixedly connected in the middle of the dust cover 14; two air inlet pipes 3 are oppositely arranged; two air inlet pipes 3 penetrate the side wall of the first dust collection bag 15 at the end; two air inlet pipes 3 are fixedly connected with annular pipes 31 at the end; a plurality of air outlet holes 32 are opened in the middle of the annular pipe 31; in working, during dust collection, first, the air pump is connected with the end of the two air inlet pipes 3, the air pump is turned on, the airflow is discharged into the air inlet pipe 3, the airflow in the air inlet pipe 3 enters the middle of the air outlet hole 32, and then the airflow is discharged to one side of the first dust collection bag 15 through a plurality of air outlet holes 32, so as to blow the dust and particulate matter on the side wall of the first dust collection bag 15, through the above structure, the dust on the surface of the first dust collection bag 15 can be quickly and effectively cleaned, the dust accumulation in the first dust collection bag 15 for a long time is reduced, the resistance of the dust collection bag is reduced, the suction force and working efficiency of the dust collection box 1 are effectively reduced, the first dust collection bag 15 maintains stable filtering efficiency, so as to maintain the performance stability of the dust collection box 1, and through the back blowing operation, the dust collection bag can be regularly cleaned, and the equipment failure caused by dust accumulation is reduced.

[0028] As shown in Figures 2 to 4As shown, the middle of the annular pipe 31 is fixed with two connecting blocks 4; two said connecting blocks 4 are oppositely arranged; the middle of the connecting block 4 is inserted with a fixed plate 42; the middle of the fixed plate 42 and the connecting block 4 is provided with a groove 41; the end of the groove 41 is fixed with a spring 43; the end of the spring 43 is fixed with a fixed block 44; the end of the two fixed plates 42 is fixed with a second dust collecting bag 45; during operation, first, press the fixed block 44 into the inside of the dust collection box 1, insert the two fixed plates 42 at the end of the second dust collecting bag 45 into the middle of the corresponding connecting block 4, the fixed plate 42 enters the middle of the fixed block 44, the spring 43 coincides with the groove 41 in the middle of the fixed block 44, the fixed block 44 is ejected by the resilience of the spring 43, the second dust collecting bag 45 is fixed on one side of the annular pipe 31 by the fixed block 44; the density of the second dust collecting bag 45 is smaller than that of the first dust collecting bag 15, the fine particles in the airflow are filtered by the second dust collecting bag 45, the above structure can effectively capture dust and fine particles in the air, thereby forming a more compact filtering barrier, reducing the penetration of fine particles from the middle of the first dust collecting bag 15 and discharging into the air environment again, which can effectively improve the overall filtering accuracy, keep the dust collection box 1 running efficiently when dealing with high concentration dust, effectively reduce the re-discharge of fine dust and particles, and make the dust collection box 1 better cope with various complex cleaning environments and maintain stable efficiency when dealing with different types of dust and particles.

[0029] As shown in Figure 3 , a plurality of said air outlet holes 32 are arranged near the side of the first dust collecting bag 15; the middle of the air outlet hole 32 is provided with a filter screen 5; the filter screen 5 is fixed in the middle of the air outlet hole 32; during operation, when the airflow is backblown to the side of the first dust collecting bag 15, the fine particles are filtered and intercepted by the filter screen 5, preventing fine particles from entering the inside of the annular pipe 31, and the above structure can effectively reduce the entry of dust and particles into the inside of the annular pipe 31, reducing the wear and blockage caused by the long-term accumulation of fine dust and particles in the inside of the annular pipe 31.

[0030] As shown in Figure 5 , the middle of the dust collection cover 14 is threadedly connected with a threaded shaft 6; the end of the dust inlet pipe 11 is fixed in the middle of the threaded shaft 6; during operation, after the first dust collecting bag 15 is removed, the dust inlet pipe 11 is rotated, the threaded shaft 6 is twisted out of the middle of the dust collection cover 14 during rotation, thereby quickly removing the dust inlet pipe 11 from the middle of the dust collection cover 14, the above structure can make the connection between the dust inlet pipe 11 and the dust collection box 1 more firm, the dust inlet pipe 11 can be easily removed from the middle of the dust collection cover 14, effectively facilitating cleaning and maintenance operations of the dust inlet pipe 11, and different lengths, diameters or materials of the dust inlet pipe 11 can be conveniently replaced, thereby adapting to different cleaning scenes and needs.

[0031] AsFigure 1 As shown, the dust collection box 1 is provided with a visual window 7; the visual window 7 is transparent; the visual window 7 is arranged at the position corresponding to the first dust collection bag 15; during use, the dust and impurities collected in the first dust collection bag 15 can be directly observed through the visual window 7; through the above structure, the dust collection condition in the first dust collection bag 15 can be directly observed without opening the dust collection box 1, and it can be known in time whether the first dust collection bag 15 needs to be cleaned or replaced, so as to reduce the problem of reduced dust collection efficiency or blockage caused by overfilling of the first dust collection bag 15, and the state in the first dust collection bag 15 does not need to be checked frequently by opening the dust collection box 1, thereby effectively improving the convenience of dust collection work.

[0032] In work, in the process of dust collection work, first of all, the motor 12 inside the dust collection box 1 is powered on, the motor 12 drives the two impellers 13 to rotate through the current, the dust inlet pipe 11 is connected with the dust collection head, the airflow corresponding to the dust collection head is sucked in through the motor 12, the airflow enters the dust collection box 1 through the dust inlet pipe 11, when the airflow passes through the middle part of the first dust collecting bag 15, the dust and impurities in the airflow are connected through the first dust collecting bag 15, the particulate matter dust and impurities are collected through the first dust collecting bag 15, the filtered purified airflow is discharged to the air outlet pipe 10 position through the first dust collecting bag 15, and in the rotating process of the two impellers 13, the two threaded brushes 16 are driven to rotate, the threaded brushes 16 are attached to the surface of the first dust collecting bag 15, the threaded brushes 16 are scraped in the rotating process to scrape the particulate matter attached to the inner wall of the first dust collecting bag 15, when the threaded brushes 16 rotate, the two first magnetic blocks 18 and the corresponding second magnetic blocks 19 are close, and the two first magnetic blocks 18 and the corresponding second magnetic blocks 19 are attracted and attached instantaneously, the first magnetic blocks 18 and the second magnetic blocks 19 are separated instantaneously through the connecting rope 17 when the threaded brushes 16 continue to rotate, so that the second magnetic blocks 19 vibrate in the middle part of the first dust collecting bag 15, and the dust and particulate impurities flow in the first dust collecting bag 15, when the first dust collecting bag 15 is installed in the dust collection box 1, first of all, a plurality of fixed rods 22 are inserted into the corresponding installation grooves 21, and then one end of the screw rod 24 is rotated, when the screw rod 24 rotates in the middle part of the fixed rod 22 and moves outward, when one end of the screw rod 24 moves in the installation groove 21, the plurality of clamping blocks 23 are pressed, so that the plurality of clamping blocks 23 are opened, the plurality of clamping blocks 23 are opened and enter the corresponding grooves, the dust collection cover 14 is clamped and fixed through the plurality of clamping blocks 23, so that the first dust collecting bag 15 is fixed in the dust collection box 1, when the first dust collecting bag 15 is disassembled, the screw rod 24 is rotated in the opposite direction, so that the screw rod 24 moves inward, the connecting part of the clamping block 23 and the end of the fixed rod 22 is provided with a torsional spring, when the end of the screw rod 24 moves inward, the dust collection work is started, first of all, the two air inlet pipes 3 are connected with the air pump, the air pump is started to make the airflow enter the air inlet pipe 3, the airflow in the air inlet pipe 3 enters the middle part of the air outlet hole 32, and then the airflow is discharged to one side of the first dust collecting bag 15 through a plurality of air outlet holes 32, so that the first dust collecting bag 15 is back blown, so that the dust and particulate matter on the side wall of the first dust collecting bag 15 is blown off, first of all, the fixed block 44 is pressed into the dust collection box 1, the two fixed plates 42 at the end of the second dust collecting bag 45 are inserted into the middle part of the connecting block 4, the fixed plate 42 enters the middle part of the fixed block 44, the spring 43 is coincided with the groove 41 in the middle part of the fixed block 44, the fixed block 44 is popped out through the resilience of the spring 43, and the second dust collecting bag 45 is fixed on one side of the annular pipe 31 through the fixed block 44.The second dust collecting bag 45 has a smaller density than the first dust collecting bag 15, and fine particles in the airflow are filtered by the second dust collecting bag 45; during the back blowing process of the airflow to the side of the first dust collecting bag 15, fine particles are filtered and intercepted by the filter screen 5, and the fine particles are prevented from entering the annular pipe 31; after the first dust collecting bag 15 is removed, the dust inlet pipe 11 is rotated, the threaded shaft 6 is twisted out of the middle part of the dust suction cover 14 during the rotation of the dust inlet pipe 11, so that the dust inlet pipe 11 is quickly removed from the middle part of the dust suction cover 14, and during the use of the dust suction box 1, the collection of dust and impurities in the first dust collecting bag 15 can be directly observed through the visual window 7.

[0033] The basic principle, main features and advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A dust extraction fan with a baghouse for easy cleaning of the dust collection bag, comprising a dust extraction box (1); characterized in that: The dust suction box (1) end is fixedly connected with an air outlet pipe (10); the dust suction box (1) end is installed with a dust suction cover (14) through a mounting assembly (2); the dust suction cover (14) is arranged away from one end of the air outlet pipe (10); the dust suction cover (14) is installed with a dust inlet pipe (11) in the middle; the dust suction box (1) is installed with a motor (12) inside; the motor (12) output end is fixedly connected with two impellers (13); the dust suction cover (14) is fixedly connected with a first dust collecting bag (15) in the middle; the first dust collecting bag (15) is arranged inside the dust suction box (1); one of the impellers (13) is fixedly connected with two threaded brushes (16) on the side close to the first dust collecting bag (15); the two threaded brushes (16) are oppositely arranged; the threaded brush (16) is fixedly connected with a connecting rope (17) in the middle; the connecting rope (17) end is fixedly connected with a first magnetic block (18); the first dust collecting bag (15) outer side wall is fixedly connected with two second magnetic blocks (19); the two second magnetic blocks (19) are oppositely arranged; the first magnetic block (18) and the second magnetic block (19) are attracted when close to each other.

2. A dust extraction fan with a bag for easy cleaning according to claim 1, characterized in that: The mounting assembly (2) comprises a mounting groove (21); a plurality of mounting grooves (21) are formed in the end of the dust suction box (1); the dust suction cover (14) is fixedly connected with a fixed rod (22) in the middle; the fixed rod (22) end is hingedly connected with a plurality of clamping blocks (23); a plurality of clamping blocks (23) are equidistantly distributed; the fixed rod (22) middle is threadedly connected with a screw rod (24).

3. A dust extraction fan with a bag for easy cleaning according to claim 1, characterized in that: The dust suction cover (14) is fixedly connected with two air inlet pipes (3) in the middle; the two air inlet pipes (3) are oppositely arranged; the two air inlet pipes (3) end penetrates the side wall of the first dust collecting bag (15); the two air inlet pipes (3) end is fixedly connected with a ring pipe (31); the ring pipe (31) middle is provided with a plurality of air outlet holes (32).

4. A dust extraction fan with a bag for easy cleaning according to claim 3, wherein: The ring pipe (31) middle is fixedly connected with two connecting blocks (4); the two connecting blocks (4) are oppositely arranged; the connecting block (4) middle is inserted with a fixed plate (42); the fixed plate (42) and the connecting block (4) middle are both provided with a groove (41); the groove (41) end is fixedly connected with a spring (43); the spring (43) end is fixedly connected with a fixed block (44); the two fixed plates (42) end is fixedly connected with a second dust collecting bag (45).

5. A dust extraction fan with a self-cleaning baghouse according to claim 3, wherein: A plurality of air outlet holes (32) are arranged on the side close to the first dust collecting bag (15); the air outlet hole (32) middle is installed with a filter screen (5); the filter screen (5) is fixedly connected in the air outlet hole (32) middle.

6. A dust extraction fan with a self-cleaning baghouse according to claim 1, wherein: The dust suction cover (14) middle is threadedly connected with a threaded shaft (6); the dust inlet pipe (11) end is fixedly connected in the threaded shaft (6) middle.

7. A dust extraction fan with a self-cleaning baghouse according to claim 1, wherein: The dust suction box (1) is installed with a visual window (7); the visual window (7) is transparent; the visual window (7) is arranged at the position corresponding to the first dust collecting bag (15).

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