An air filtration and dust removal device and a filtration method for a dryer

Abstract

The present invention relates to the technical field of dust removal devices, and discloses an air filtration and dust removal device and a filtration method for a dryer, including a housing. An air inlet pipe is fixed on one side of the housing, a side funnel is fixed on the other side of the housing, and an exhaust pipe is fixed on the side of the side funnel away from the housing. In the present invention, when the dust-containing air flow passes through the housing, spray dust removal is first carried out, then larger-particle dust is filtered by a metal sieve plate, and finally smaller dust is filtered by an air filter element. This multi-stage treatment method for removing impurities improves the dust filtration effect, ensures the cleanliness of the air flow output by the dryer, and during multi-stage treatment, each part performs its own functions, with small losses, not easily blocked, long service life, and excellent long-term filtration effect. Secondly, the spray dust removal method can take away part of the heat in the air flow, making the heat of the air flow lower when passing through the air filter element, so that the air filter element is not easily damaged by heat, and further extends the service life of the air filter element.

Description

Technical Field

[0001] The present invention relates to the technical field of dust removal devices, and specifically to an air filtration and dust removal device and a filtration method for a dryer. Background Art

[0002] Plastic dryers are mainly used to dry the injection molding raw materials of injection molding machines. The plastic raw materials are mainly dried by passing hot air into the barrel. However, there are impurities in the plastic raw materials, which are discharged together with the exhausted air during drying. Therefore, it is necessary to filter the impurities in the exhausted hot air. The structure of the existing filter mainly includes a stainless steel tank connected to the barrel, and an air filter element is installed in the tank to achieve filtration. However, this filtering method has certain deficiencies: First, this filtration only relies on one filter element to achieve filtration, and the filtration effect is limited. When there are more impurities, the frequency of filter element blockage increases and needs to be replaced frequently. In addition to ordinary dust in the plastic raw materials, there is also a part of plastic debris, which is light in weight and large in volume, and is easily discharged together with the dust. When it adheres to the filter element, it will further exacerbate the blockage of the filter element. Second, since the impurity-containing airflow discharged from the dryer is a hot airflow, the aging speed of the filter element will also be faster under the action of the hot airflow, which has a negative impact on the filtering function and further increases the replacement frequency of the filter element. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides an air filtration and dust removal device and a filtration method for a dryer, which have the advantages of good filtration effect, easy maintenance, long service life, etc., and solve the problems of insufficient filtration effect, short filter element life, and high filter element replacement frequency when the existing filter filters the plastic dryer.

[0004] To solve the above technical problems, the present invention provides the following technical solution: An air filtration and dust removal device, comprising a housing, an air inlet pipe is fixed on one side of the housing, a side funnel is fixed on the other side of the housing, an exhaust pipe is fixed on the side of the side funnel away from the housing, an air filter element is installed at one end of the exhaust pipe away from the side funnel, the air filter element is used to filter small-particle impurities, a sieve plate assembly is installed at the connection between the side funnel and the housing, a lower funnel is also fixed at the bottom of the housing, and a spray dust reduction assembly is installed on the housing; the sieve plate assembly includes a vertically arranged metal sieve plate, the surface of the metal sieve plate is provided with sieve holes, and the metal sieve plate is used to pre-filter large-particle impurities; the lower funnel is used to hold water, the spray dust reduction assembly includes a sprayer installed on the inner top wall of the housing and a water pump installed at the bottom of the lower funnel, the water pump is used to transport the water in the lower funnel to the sprayer, and the sprayer is used to spray water mist into the housing; when the dryer is running, the dust-containing air flow enters the housing through the air inlet pipe, and is discharged after passing through the metal sieve plate and the air filter element in sequence. Among them, the metal sieve plate pre-filters the larger particles in the air flow, and the air filter element further filters the smaller particles in the air flow. At the same time, the spray dust reduction assembly operates, the water pump transports the water flow in the lower funnel to the sprayer, and the sprayer sprays water mist into the housing. The water mist makes some impurities in the air flow in the housing settle and fall into the lower funnel, and also cools the air flow.

[0005] Preferably, a strip-shaped hole is opened at the top of the housing, the sieve plate assembly further includes a strip-shaped plate fixed on the top of the housing, the strip-shaped plate covers the strip-shaped hole, and the top end of the metal sieve plate penetrates through the strip-shaped hole and is fixedly connected to the strip-shaped plate. A strip-shaped hole is opened at the top of the housing, the sieve plate assembly further includes a strip-shaped plate fixed on the top of the housing, the strip-shaped plate covers the strip-shaped hole, and the top end of the metal sieve plate penetrates through the strip-shaped hole and is fixedly connected to the strip-shaped plate.

[0006] Preferably, the input end of the water pump is fixed to the bottom of the lower funnel, the input end of the water pump is also fixedly connected with a liquid filter element, the liquid filter element extends into the lower funnel, the output end of the water pump is fixed with a drain pipe, one end of the drain pipe penetrates through the top wall of the housing and is fixed to the top wall of the housing, and the end of the drain pipe extends into the housing and is connected to the sprayer.

[0007] Preferably, the sprayer includes a hollow rod arranged inside the housing, a hose is fixed to the top of the hollow rod, the top end of the hose is fixedly connected to the end of the drain pipe, a plurality of uniformly distributed bent nozzles are fixedly connected to the side of the hollow rod, a plurality of uniformly distributed baffle plates are also installed at the bottom of the hollow rod, the baffle plates are in one-to-one correspondence with the bent nozzles, and the baffle plates are located on the output path of the bent nozzles.

[0008] Preferably, brushes are provided on both sides of the metal sieve plate, and a main driving assembly is further installed on the strip-shaped plate. The main driving assembly is used to drive the brushes to rotate and move vertically, so as to clean the metal sieve plate.

[0009] Preferably, a driven gear is fixedly connected to the end of the brush. The main driving assembly includes a fixed rack and a movable plate. The fixed rack is vertically arranged and fixed on the inner wall of the housing. The fixed rack meshes with the driven gear. The movable plate is located on the top of the strip-shaped plate. A plurality of vertical rods are fixedly connected to the bottom of the strip-shaped plate. The vertical rods penetrate through the strip-shaped plate and extend into the housing. A lower bearing seat is fixed at one end of the vertical rod inside the housing. The lower bearing seat is rotatably connected to the brush. The main driving assembly further includes two vertical cylinders fixed on the strip-shaped plate. Output ends of the two vertical cylinders are fixedly connected to the movable plate.

[0010] Preferably, a plurality of vertically arranged vertical shafts are fixed at the bottom end of the hollow rod. A worm gear is rotatably connected to the vertical shaft. A support rod is fixedly connected to one side of the worm gear. The baffle is fixed at the end of the support rod. A sub-driving assembly is installed on the housing. The sub-driving assembly is used to drive the bent nozzle to point to the metal sieve plate. The sub-driving assembly is further used to drive the baffle to move, so as to spray water flow onto the metal sieve plate.

[0011] Preferably, the sub-driving assembly includes two extension plates respectively connected to both ends of the hollow rod. One end of the extension plate is fixedly connected to the end of the hollow rod. The other end of the extension plate is fixedly connected to a base shaft. The base shaft is parallel to the hollow rod. The base shaft penetrates through the side wall of the housing and is rotatably connected to the side wall of the housing. The sub-driving assembly further includes a motor, a sleeve and a worm. The motor is fixed outside the housing. The output shaft of the motor is fixedly connected to the end of the base shaft. The sleeve is sleeved outside the base shaft and is fixedly connected to the inner wall of the housing. A driving gear is fixed on the sleeve. The worm is installed on the hollow rod through an upper bearing seat. The worm meshes with a plurality of worm gears at the same time. An adjusting gear is fixed at the end of the worm. The adjusting gear meshes with the driving gear.

[0012] Preferably, a slot is formed at the bottom of the metal sieve plate. A sealing plate is inserted into the slot. A spring is fixed between the top edge of the sealing plate and the inner wall of the slot. Support rods are fixedly connected to both sides of the sealing plate. The support rods extend to the bottom of the lower bearing seat.

[0013] The present invention also discloses a filtering method for a dryer. This filtering method for a dryer uses the above-mentioned air filtering and dust removing device.

[0014] Compared with the prior art, the present invention provides an air filtering and dust removing device and a filtering method for a dryer, and has the following beneficial effects:

[0015] 1. The air filtration and dust removal device and the filtration method for a dryer, by setting a metal sieve plate, an air filter element, and a spray dust reduction component, when the dust-containing air flow passes through the housing, spray dust reduction is first carried out, then the metal sieve plate is used to filter dust with larger particle sizes, and finally the air filter element is used to filter smaller dust. This multi-stage impurity removal method improves the dust filtration effect, ensures the cleanliness of the air flow output by the dryer, and during multi-stage processing, each part performs its own functions, with small losses, not easily blocked, long service life, and excellent long-term filtration effect. Secondly, the spray dust reduction method can take away part of the heat in the air flow, making the heat of the air flow lower when passing through the air filter element, the air filter element is not easily damaged by heat, and the service life of the air filter element is further extended;

[0016] 2. The air filtration and dust removal device and the filtration method for a dryer, by setting a brush and a main drive component on the metal sieve plate, when a large amount of dust adheres to the surface of the metal sieve plate and causes the metal sieve plate to be blocked, the main drive component operates to make the brush roll along the metal sieve plate, thereby achieving the cleaning effect, facilitating the automatic maintenance of the metal sieve plate, without manual handling, and being more efficient;

[0017] 3. The air filtration and dust removal device and the filtration method for a dryer, by setting an auxiliary drive component, when the brush cleans the metal sieve plate, the auxiliary drive component can also force the sprayer to align with the metal sieve plate and spray water. Under the pressure and flow action of the water, the cleaning effect of the brush on the dust is better, and the cleaning efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a working schematic diagram of an air filtration and dust removal device of the present invention Figure 1 ;

[0019] Figure 2 is a working schematic diagram of an air filtration and dust removal device of the present invention Figure 2 ;

[0020] Figure 3 is a sectional view of an air filtration and dust removal device of the present invention Figure 1 ;

[0021] Figure 4 is a sectional view of an air filtration and dust removal device of the present invention Figure 2 ;

[0022] Figure 5 is a structural schematic diagram of a sieve plate assembly of the present invention;

[0023] Figure 6 is of the present invention Figure 5 enlarged view of part A;

[0024] Figure 7 is a sectional view of a sieve plate assembly of the present invention;

[0025] Figure 8 is the enlarged view of part B of the present invention Figure 7 ;

[0026] Figure 9 is the working schematic diagram of the auxiliary drive assembly of the present invention

[0027] Figure 10 is the enlarged view of part C of the present invention Figure 9 ;

[0028] In the figure: 1. housing; 101. intake pipe; 102. side funnel; 103. exhaust pipe; 104. lower funnel; 105. strip hole; 2. air filter element; 3. sieve plate assembly; 31. metal sieve plate; 311. slot; 312. sealing plate; 313. spring; 314. support rod; 32. strip plate; 4. spray dust suppression assembly; 41. sprayer; 411. hollow rod; 412. hose; 413. bent nozzle; 414. baffle; 415. vertical shaft; 416. worm gear; 417. support rod; 42. water pump; 43. liquid filter element; 44. drain pipe; 5. brush; 51. driven gear; 6. main drive assembly; 61. fixed rack; 62. movable plate; 63. vertical rod; 64. lower bearing seat; 65. vertical cylinder; 7. auxiliary drive assembly; 71. extension plate; 72. base shaft; 73. motor; 74. sleeve; 75. worm; 76. drive gear; 77. upper bearing seat; 78. adjusting gear Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0030] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present application proposes an air filtration and dust removal device and a filtration method for a dryer

[0031] Embodiment 1: Please refer to Figures 1 - 4, an air filtration and dust removal device, comprising a housing 1. One side of the housing 1 is fixedly provided with an air inlet pipe 101, and the other side of the housing 1 is fixedly provided with a side funnel 102. One side of the side funnel 102 away from the housing 1 is fixedly provided with an exhaust pipe 103. An air filter element 2 is installed at one end of the exhaust pipe 103 away from the side funnel 102. The air filter element 2 is used for filtering small-particle impurities. A sieve plate assembly 3 is installed at the connection between the side funnel 102 and the housing 1. A lower funnel 104 is also fixedly provided at the bottom of the housing 1. A spray dust reduction assembly 4 is installed on the housing 1. The sieve plate assembly 3 includes a vertically arranged metal sieve plate 31. The surface of the metal sieve plate 31 is provided with sieve holes. The metal sieve plate 31 is used for pre-filtering large-particle impurities. The lower funnel 104 is used for containing water. The spray dust reduction assembly 4 includes a sprayer 41 installed on the inner top wall of the housing 1 and a water pump 42 installed at the bottom of the lower funnel 104. The water pump 42 is used for transporting the water in the lower funnel 104 to the sprayer 41. The sprayer 41 is used for spraying water mist into the interior of the housing 1. When the dryer is operating, the dust-containing air flows into the housing 1 through the air inlet pipe 101, and is discharged after passing through the metal sieve plate 31 and the air filter element 2 in sequence. Among them, the metal sieve plate 31 pre-filters the larger particles in the air flow, and the air filter element 2 further pre-filters the smaller particles in the air flow. At the same time, the spray dust reduction assembly 4 operates, and the water pump 42 transports the water flow in the lower funnel 104 to the sprayer 41. The sprayer 41 sprays water mist into the housing 1. The water mist causes some impurities in the air flow in the housing 1 to settle and fall into the lower funnel 104, and also cools the air flow. Among them, the air inlet pipe 101 is connected to the barrel of the plastic dryer. The exhaust pipe 103 is arranged as a horizontally arranged cylindrical barrel. A discharge port is provided at one end of the exhaust pipe 103 away from the side funnel 102. One end of the air filter element 2 is fixed to the discharge port and the other end extends into the exhaust pipe 103. A movable cover is installed on the side wall of the housing 1. Before using the equipment, the movable cover is opened in advance and clean water is injected into the lower funnel 104. When in use, when the plastic dryer is operating, the dust-containing air flows into the housing 1 through the air inlet pipe 101, and then passes through the metal sieve plate 31 and the air filter element 2 in sequence. Among them, the metal sieve plate 31 pre-filters the larger particles in the air flow, and the air filter element 2 re-filters the smaller particles in the air flow. At the same time, the spray dust reduction assembly 4 is also started to make the water pump 42 operate. The water pump 42 inputs the water in the lower funnel 104 into the sprayer 41, and then forms water mist to spray in the housing 1, settling the impurities in the air flow in the housing 1, and also cooling the air flow. The air flow settling with the water mist falls into the clean water in the lower funnel 104;By setting the metal sieve plate 31, the air filter element 2 and the spray dust suppression assembly 4, when the dust-containing air flow passes through the housing 1, spray dust suppression is first carried out, then the larger particle-size dust is filtered by the metal sieve plate 31, and finally the smaller filter element is filtered by the air filter element 2. This multi-stage impurity removal method improves the dust filtering effect, ensures the cleanliness of the air flow output by the dryer, and during multi-stage processing, each part performs its own functions, with small losses, not easily blocked, long service life, and excellent long-term filtering effect. Secondly, the spray dust suppression method can take away part of the heat in the air flow, making the heat lower when the air flow passes through the air filter element 2, and the air filter element 2 is not easily damaged by heat, and the service life of the air filter element 2 is further extended.

[0032] Embodiment 2: Refer to Figures 3 - 5 , different from the above embodiment, a strip-shaped hole 105 is opened at the top of the housing 1, and the sieve plate assembly 3 further includes a strip-shaped plate 32 fixed to the top of the housing 1. The strip-shaped plate 32 covers the strip-shaped hole 105, and the top end of the metal sieve plate 31 penetrates through the strip-shaped hole 105 and is fixedly connected to the strip-shaped plate 32.

[0033] Among them, the connection between the strip-shaped plate 32 and the housing 1 is sealed. The strip-shaped plate 32 is preferably fixed to the housing 1 by screws. By setting the strip-shaped hole 105 and the strip-shaped plate 32, it is convenient to disassemble and assemble the metal sieve plate 31.

[0034] Embodiment 3, refer to Figure 3 , Figure 4 , Figure 9 and Figure 10 , different from the above embodiment, the input end of the water pump 42 is fixed to the bottom of the lower funnel 104, and a liquid filter element 43 is also fixedly connected to the input end of the water pump 42. The liquid filter element 43 extends into the lower funnel 104. The output end of the water pump 42 is fixed with a drain pipe 44. One end of the drain pipe 44 penetrates through the top wall of the housing 1 and is fixed to the top wall of the housing 1. The end of the drain pipe 44 extends into the housing 1 and is connected to the sprayer 41. The sprayer 41 includes a hollow rod 411 arranged inside the housing 1. A hose 412 is fixed to the top of the hollow rod 411. The top end of the hose 412 is fixed to the end of the drain pipe 44. A plurality of uniformly distributed bent nozzles 413 are fixedly connected to the side of the hollow rod 411. A plurality of uniformly distributed baffle plates 414 are also installed at the bottom of the hollow rod 411. The baffle plates 414 are in one-to-one correspondence with the bent nozzles 413, and the baffle plates 414 are located on the output path of the bent nozzles 413.

[0035] Among them, a sewage discharge branch pipe is also fixed on the drain pipe 44. Valves are provided on both the drain pipe 44 and the sewage discharge pipe. When it is necessary to replace the liquid in the lower funnel 104, the valve on the drain pipe 44 is closed, and then the valve on the sewage discharge pipe is opened. The liquid filter element 43 is used to filter impurities in the liquid in the lower funnel 104. In the initial state, the output direction of the bent nozzle 413 is vertically downward. When in use, the water pump 42 is started. The water pump 42 sucks the clear water in the lower funnel 104 and then discharges it. The water flow sequentially passes through the drain pipe 44, the hose 412, the hollow pipe, and is sprayed out through the bent nozzle 413. The thin water flow sprayed out by the bent nozzle 413 just sprays onto the baffle 414, so that the water flow is dispersed around, forming water mist and falling, thereby achieving the effect of dust reduction. By setting the water pump 42 and the sprayer 41, a continuous water mist can be formed in the housing 1, which is beneficial to achieving the effects of dust reduction and temperature reduction.

[0036] Embodiment 4, refer to Figure 2 、 Figure 5 and Figure 6 , different from the above embodiment, brushes 5 are provided on both sides of the metal sieve plate 31. A main driving assembly 6 is also installed on the strip plate 32. The main driving assembly 6 is used to drive the brushes 5 to rotate and move vertically, so as to clean the metal sieve plate 31. A driven gear 51 is fixedly connected to the end of the brush 5. The main driving assembly 6 includes a fixed rack 61 and a movable plate 62. The fixed rack 61 is vertically arranged and fixed on the inner wall of the housing 1. The fixed rack 61 meshes with the driven gear 51. The movable plate 62 is located on the top of the strip plate 32. A plurality of vertical rods 63 are fixedly connected to the bottom of the strip plate 32. The vertical rods 63 penetrate through the strip plate 32 and extend into the housing 1. A lower bearing seat 64 is fixed at one end of the vertical rod 63 inside the housing 1. The lower bearing seat 64 is rotatably connected to the brush 5. The main driving assembly 6 further includes two vertical cylinders 65 fixed on the strip plate 32. The output ends of the two vertical cylinders 65 are both fixedly connected to the movable plate 62.

[0037] Among them, the brush 5 includes a brush shaft and brush filaments. The brush filaments are attached to the side wall of the metal sieve plate 31. Four vertical rods 63 are fixed to the bottom of the movable plate 62. Two of them are in a group, with a total of two groups. The two groups of vertical rods 63 are respectively located on both sides of the metal sieve plate 31, and the two groups of vertical rods 63 are respectively connected to two brushes 5. During use, the vertical cylinder 65 operates and extends, driving the movable plate 62 to move vertically upward. When the movable plate 62 moves vertically upward, it drives multiple vertical rods 63 to move upward. When the multiple vertical rods 63 move upward, they drive the lower bearing seat 64 to move upward. When the lower bearing seat 64 moves upward, it drives two brushes 5 to move upward. At the same time, since the driven gear 51 at the end of the brush 5 meshes with the fixed rack 61, when the brush 5 moves upward, the driven gear 51 rolls along the fixed rack 61, causing the brush 5 to rotate accordingly. The brush 5 rotates while moving upward, which can clean the dust attached to the surface of the metal sieve mesh. By arranging the brush 5 and the main drive assembly 6 on the metal sieve plate 31, when a large amount of dust adheres to the surface of the metal sieve plate 31 and causes the metal sieve plate 31 to be blocked, the main drive assembly 6 operates to make the brush 5 roll along the metal sieve plate 31, thereby realizing the cleaning function, facilitating the automatic maintenance of the metal sieve plate 31, eliminating the need for manual handling, and being more efficient.

[0038] Embodiment 5, refer to Figures 5 - 10, different from the above embodiments, a plurality of vertically arranged shafts 415 evenly distributed are fixed at the bottom end of the hollow rod 411. A worm wheel 416 is rotatably connected to the vertically arranged shaft 415. A support rod 417 is fixedly connected to one side of the worm wheel 416. The baffle 414 is fixed to the end of the support rod 417. A secondary drive assembly 7 is installed on the housing 1. The secondary drive assembly 7 is used to drive the bent nozzle 413 to point to the metal sieve plate 31. The secondary drive assembly 7 is also used to drive the baffle 414 to move, so as to spray water flow to the metal sieve plate 31. The secondary drive assembly 7 includes two extension plates 71 respectively connected to both ends of the hollow rod 411. One end of the extension plate 71 is fixedly connected to the end of the hollow rod 411. The other end of the extension plate 71 is fixedly connected to a base shaft 72. The base shaft 72 is parallel to the hollow rod 411. The base shaft 72 penetrates through the side wall of the housing 1 and is rotatably connected to the side wall of the housing 1. The secondary drive assembly 7 further includes a motor 73, a sleeve 74 and a worm 75. The motor 73 is fixed outside the housing 1. The output shaft of the motor 73 is fixedly connected to the end of the base shaft 72. The sleeve 74 is sleeved outside the base shaft 72 and is fixedly connected to the inner wall of the housing 1. A drive gear 76 is fixed on the sleeve 74. The worm 75 is installed on the hollow rod 411 through an upper bearing seat 77. The worm 75 meshes with a plurality of worm wheels 416 at the same time. An adjusting gear 78 is fixed to the end of the worm 75. The adjusting gear 78 meshes with the drive gear 76. A slot 311 is formed at the bottom of the metal sieve plate 31. A sealing plate 312 is inserted into the slot 311. A spring 313 is fixed between the top edge of the sealing plate 312 and the inner wall of the slot 311. Support rods 314 are fixedly connected to both sides of the sealing plate 312. The support rods 314 extend to the bottom of the lower bearing seat 64.

[0039] Among them, the hollow rod 411, the extension plate 71 and the base shaft 72 together form a crank structure. In the initial state, the support rod 314 is attached to the bottom of the lower bearing seat 64, the spring 313 is in a stretched state, the bottom of the sealing plate 312 is in contact with the inner bottom wall of the housing 1, and the brushes 5 are respectively located on both sides of the sealing plate 312 at this time. When the main drive assembly 6 operates, it drives the brushes 5 and the lower bearing seat 64 to move upward. At this time, the pulling force of the spring 313 causes the sealing plate 312 and the support rod 314 to move upward and contract into the slot 311. After the sealing plate 312 moves upward, an opening appears at the bottom of the metal sieve plate 31. At this time, when the brushes 5 clean the dust, the dust on the side of the metal sieve plate 31 close to the air filter element 2 can fall through the opening and slide into the lower funnel 104 after falling, which facilitates the collection of the fallen dust. And while cleaning the metal sieve plate 31, the spray dust suppression assembly 4 and the auxiliary drive assembly 7 are started. At this time, the motor 73 operates to drive the base shaft 72 to rotate a certain angle, and then drives the hollow rod 411 and the extension plate 71 to swing a certain angle around the base shaft 72, just making the bent nozzle 413 face the metal sieve plate 31. In addition, when the hollow rod 411 swings, the adjusting gear 78 at the end of the worm 75 rolls around the outer edge of the drive rod gear, causing the worm 75 to rotate. When the worm 75 rotates, it simultaneously drives a plurality of worm wheels 416 to rotate. When the worm wheels 416 rotate, they drive the support rods 417 to swing. When the support rods 417 swing, they drive the baffle 414 to move. After the baffle 414 moves, it deviates from the output direction of the bent nozzle 413, so that the fine water flow sprayed by the bent nozzle 413 no longer forms a water mist, but is directly sprayed on the surface of the metal sieve plate 31. By setting the auxiliary drive assembly 7, when the brushes 5 clean the metal sieve plate 31, the auxiliary drive assembly 7 can also force the sprayer 41 to align with the metal sieve plate 31 and spray water. Under the pressure and flow action of the water flow, the cleaning effect of the brushes 5 on the dust is better, and the cleaning efficiency is improved.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air filtering and dust removing device, comprising a housing, characterized in that: An air inlet pipe is fixed to one side of the shell, a side funnel is fixed to the other side of the shell, an exhaust pipe is fixed to the side of the side funnel away from the shell, an air filter is installed at the end of the exhaust pipe away from the side funnel, and the air filter is used to filter small-sized impurities. A sieve plate assembly is installed at the connection between the side funnel and the shell, a lower funnel is also fixed to the bottom of the shell, and a spray dust suppression assembly is installed on the shell; The sieve plate assembly comprises a vertically arranged metal sieve plate, the surface of which is provided with sieve holes, and the metal sieve plate is used for pre-filtering large-size impurities, and the sieve plate assembly also comprises a strip plate fixed on the top of the shell; The lower funnel is used to hold water, the spray dust suppression assembly includes a sprayer installed on the top wall of the shell and a water pump installed at the bottom of the lower funnel, the water pump is used to transport the water in the lower funnel to the sprayer, and the sprayer is used to spray water mist into the shell; When the dryer is running, the dusty airflow enters the shell through the air inlet pipe, and is discharged after passing through the metal screen plate and the air filter element in sequence. The metal screen plate pre-filters the larger particles in the airflow, and the air filter element then filters the smaller particles in the airflow. At the same time, the spray dust reduction component is running, and the water pump conveys the water flow in the lower funnel to the sprayer, which sprays water mist into the shell. The water mist causes some impurities in the airflow in the shell to settle and fall into the lower funnel, and also cools the airflow. The input end of the water pump is fixed to the bottom of the lower funnel, and the input end of the water pump is also fixedly connected to a liquid filter element, and the liquid filter element extends into the lower funnel. The output end of the water pump is fixed to a drain pipe, one end of which passes through the top wall of the shell and is fixed to the top wall of the shell, and the end of the drain pipe extends into the shell and is connected to the sprinkler; The sprayer comprises a hollow rod arranged inside the shell, a hose is fixed on the top of the hollow rod, the top of the hose is fixed to the end of the drain pipe, a plurality of evenly distributed bending nozzles are fixedly connected to the side of the hollow rod, and a plurality of evenly distributed baffles are also installed at the bottom of the hollow rod, the baffles are matched with the bending nozzles one by one, and the baffles are located on the output path of the bending nozzles; Brushes are provided on both sides of the metal sieve plate, and a main driving assembly is also installed on the strip plate, and the main driving assembly is used to drive the brushes to rotate and move vertically, so as to clean the metal sieve plate; The end of the brush is fixedly connected to a driven gear, the main driving assembly includes a fixed rack and a movable plate, the fixed rack is vertically arranged and fixed to the inner wall of the shell, the fixed rack is meshed with the driven gear, the movable plate is located at the top of the strip plate, the bottom of the strip plate is fixedly connected to a plurality of vertical rods, the vertical rods penetrate the strip plate and extend into the shell, the vertical rods are located inside the shell and one end is fixed with a lower bearing seat, the lower bearing seat is rotatably connected to the brush, the main driving assembly also includes two vertical cylinders fixed to the strip plate, the output ends of the two vertical cylinders are fixedly connected to the movable plate; A plurality of evenly arranged vertical shafts are fixed to the bottom end of the hollow rod, a worm gear is rotatably connected to the vertical shaft, a support rod is fixedly connected to one side of the worm gear, the baffle is fixed to the end of the support rod, and an auxiliary driving assembly is installed on the shell, the auxiliary driving assembly is used to drive the bending nozzle to point to the metal sieve plate, and the auxiliary driving assembly is also used to drive the baffle to move, so as to spray water flow to the metal sieve plate; The auxiliary drive assembly includes two extension plates respectively connected to the two ends of the hollow rod, one end of the extension plate is fixedly connected to the end of the hollow rod, and the other end of the extension plate is fixedly connected to a base shaft, the base shaft is parallel to the hollow rod, the base shaft passes through the side wall of the shell and is rotatably connected to the side wall of the shell, the auxiliary drive assembly also includes a motor, a sleeve and a worm, the motor is fixed to the outside of the shell, the motor output shaft is fixed to the end of the base shaft, the sleeve is sleeved on the outside of the base shaft and fixedly connected to the inner wall of the shell, a driving gear is fixed on the sleeve, the worm is installed on the hollow rod through an upper bearing seat, the worm is meshed with multiple worm wheels at the same time, an adjusting gear is fixed to the end of the worm, and the adjusting gear is meshed with the driving gear.

2. The air filtering and dust removing device according to claim 1, characterized in that: A strip hole is opened on the top of the shell body, the strip plate covers the strip hole, and the top end of the metal sieve plate passes through the strip hole and is fixedly connected to the strip plate.

3. An air filtering and dust removal device according to claim 2, characterized in that: A slot is provided at the bottom of the metal screen plate, a sealing plate is inserted into the slot, a spring is fixed between the top edge of the sealing plate and the inner wall of the slot, support rods are fixedly connected on both sides of the sealing plate, and the support rods extend to the bottom of the lower bearing seat.

4. A filtering method for a dryer, characterized in that: The filtering method for a dryer uses an air filtering and dust removal device as described in any one of claims 1-3.

Images