Air filtering and dust removing device and filtering method for drying machine

Abstract

The invention relates to the technical field of dust removal devices, and discloses an air filtering dust removal device and a filtering method for a drying machine, the air filtering dust removal device comprises a shell, an air inlet pipe is fixed on one side of the shell, a side funnel is fixed on the other side of the shell, and an exhaust cylinder is fixed on one side, away from the shell, of the side funnel. When dust-containing airflow penetrates through the shell, spraying and dust falling are firstly carried out, then large-particle-size dust is filtered through the metal sieve plate, finally small filter elements are filtered through the air filter elements, the dust filtering effect is improved through the multi-stage treatment impurity removal mode, the cleanliness of the airflow output by the drying machine is guaranteed, parts perform their own functions during multi-stage treatment, and the dust removal efficiency is improved. The air filter element is small in loss, not prone to blockage, long in service life and excellent in long-term filtering effect, part of heat in airflow can be taken away in a spraying and dust falling mode, the heat generated when the airflow penetrates through the air filter element is lower, the air filter element is not prone to being heated and damaged, and the service life of the air filter element is further prolonged.

Description

Technical Field

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

[0002] Plastic dryers are mainly used to dry the injection molding materials of injection molding machines. They mainly dry the plastic raw materials by passing hot air into the barrel. However, there are impurities in the plastic raw materials, which are discharged with the exhaust air during drying. Therefore, it is necessary to filter the impurities in the exhaust 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 shortcomings: first, this filtration relies on only one filter element to achieve filtration, and the filtration effect is limited. When there are more impurities, the frequency of filter element clogging increases and needs to be replaced frequently. In addition to ordinary dust, there are also some plastic debris in the plastic raw materials. They are light in weight and large in volume. They are easily discharged with dust. When attached to the filter element, the clogging of the filter element will be further aggravated. Secondly, since the impurity-containing airflow discharged from the dryer is a hot airflow, the filter element will age faster under the action of the hot airflow, which will have a negative impact on the filtration function and further increase the replacement frequency of the filter element. Summary of the invention

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

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: an air filtering and dust removing device, comprising a shell, 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 element is installed at the end of the exhaust pipe away from the side funnel, the air filter element 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 reduction assembly is installed on the shell; the sieve plate assembly comprises 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-sized impurities; the lower funnel is used to hold water, The spray dust reduction component 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 dust-laden airflow enters the shell through the air inlet pipe, and is discharged after passing through the metal sieve plate and the air filter element in sequence, wherein the metal sieve 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, the water pump transports the water flow in the lower funnel to the sprayer, and the sprayer sprays water mist into the shell, the water mist causes part of the impurities in the airflow in the shell to settle and fall into the lower funnel, and also cools the airflow.

[0005] Preferably, a strip hole is opened on the top of the shell, and the sieve plate assembly also includes a strip plate fixed on the top of the shell, 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. A strip hole is opened on the top of the shell, and the sieve plate assembly also includes a strip plate fixed on the top of the shell, 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.

[0006] Preferably, 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 the drain pipe 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.

[0007] Preferably, the sprayer includes a hollow rod arranged inside a shell, a hose is fixed on the top of the hollow rod, the top of the hose is fixed to the end of a drain pipe, a plurality of evenly distributed bent nozzles are fixedly connected to the side of the hollow rod, and a plurality of evenly distributed baffles are also installed on the bottom of the hollow rod, the baffles are matched one by one with the bent nozzles, and the baffles 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 also installed on the strip plate, and the main driving assembly is used to drive the brush to rotate and move vertically, so as to clean the metal sieve plate.

[0009] Preferably, the end of the brush is fixedly connected to a driven gear, and 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, and a plurality of vertical rods are fixedly connected to the bottom of the strip plate, the vertical rods penetrate the strip plate and extend into the shell, and a lower bearing seat is fixed at one end of the vertical rod located inside the shell, and the lower bearing seat is rotatably connected to the brush, and the main driving assembly also includes two vertical cylinders fixed on the strip plate, and the output ends of the two vertical cylinders are fixedly connected to the movable plate.

[0010] Preferably, 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 drive assembly is installed on the shell, the auxiliary drive assembly is used to drive the bent nozzle to point to the metal sieve plate, and the auxiliary drive assembly is also used to drive the baffle to move, so as to spray water onto the metal sieve plate.

[0011] Preferably, the auxiliary driving 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 driving 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.

[0012] Preferably, a slot is provided 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 on both sides of the sealing plate, and the support rods extend to the bottom of the lower bearing seat.

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

[0014] Compared with the prior art, the present invention provides an air filtering and dust removal device and a filtering method for a dryer, which has the following beneficial effects: 1. The air filtering and dust removal device and the filtering method for the dryer are provided with a metal sieve plate, an air filter element and a spray dust reduction component. When the dust-laden airflow passes through the housing, spray dust reduction is first performed, and then the metal sieve plate is used to filter the dust of larger particle size, and finally the air filter element is used to filter the smaller filter element. This multi-stage treatment and impurity removal method improves the dust filtering effect and ensures the cleanliness of the dryer output airflow. In addition, the parts perform their respective functions during the multi-stage treatment, with low loss, not easy to be blocked, long service life and excellent long-term filtering effect. Secondly, the spray dust reduction method can take away part of the heat in the airflow, so that the heat of the airflow passing through the air filter element is lower, the air filter element is not easily damaged by heat, and the service life of the air filter element is further extended. 2. This air filtering and dust removal device and the filtering method for the dryer are provided with a brush and a main driving assembly 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 driving assembly 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 processing, and being more efficient; 3. This type of air filtering and dust removal device and filtering method for a dryer, by setting an auxiliary driving component, when the brush cleans the metal screen plate, the auxiliary driving component can also force the sprayer to aim at the metal screen plate and spray water. Under the pressure and flow of the water flow, the brush can better clean the dust and improve the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The working diagram of an air filtering and dust removing device of the present invention is shown in FIG. Figure 1 ; Figure 2 The working diagram of an air filtering and dust removing device of the present invention is shown in FIG. Figure 2 ; Figure 3 A cross-sectional view of an air filtering and dust removing device of the present invention Figure 1 ; Figure 4 A cross-sectional view of an air filtering and dust removing device of the present invention Figure 2 ; Figure 5 It is a structural schematic diagram of the sieve plate assembly of the present invention; Figure 6 For the present invention Figure 5 A magnified view of part A; Figure 7 is a cross-sectional view of a screen plate assembly of the present invention; Figure 8 For the present invention Figure 7 A magnified view of part B; Fig. 9 is a working schematic diagram of the auxiliary driving assembly of the present invention; Fig.10 For the present invention Fig. 9 Enlarged view of part C.

[0016] In the figure: 1, housing; 101, air inlet pipe; 102, side funnel; 103, exhaust tube; 104, lower funnel; 105, strip hole; 2, air filter element; 3, screen plate assembly; 31, metal screen plate; 311, slot; 312, sealing plate; 313, spring; 314, support rod; 32, strip plate; 4, spray dust suppression assembly; 41, sprinkler; 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. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes an air filtering and dust removal device and a filtering method for a dryer.

[0019] Example 1: Please refer to Figure 1-Figure 4, an air filtering and dust removal device, comprising a shell 1, an air inlet pipe 101 is fixed to one side of the shell 1, a side funnel 102 is fixed to the other side of the shell 1, an exhaust pipe 103 is fixed to the side of the side funnel 102 away from the shell 1, an air filter element 2 is installed at the end of the exhaust pipe 103 away from the side funnel 102, the air filter element 2 is used to filter small-sized impurities, a sieve plate assembly 3 is installed at the connection between the side funnel 102 and the shell 1, a lower funnel 104 is also fixed to the bottom of the shell 1, and a spray dust reduction assembly 4 is installed on the shell 1; the sieve plate assembly 3 includes a vertically arranged metal sieve plate 31, and the surface of the metal sieve plate 31 is provided with The metal sieve plate 31 is provided with sieve holes, and is used to pre-filter large-size impurities; the lower funnel 104 is used to hold water, and the spray dust reduction assembly 4 includes a sprayer 41 installed on the top wall of the housing 1 and a water pump 42 installed at the bottom of the lower funnel 104, and the water pump 42 is used to transport the water in the lower funnel 104 to the sprayer 41, and the sprayer 41 is used to spray water mist into the interior of the housing 1; when the dryer is running, the dust-laden airflow enters 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, wherein the metal sieve plate 31 pre-filters the larger particles in the airflow, and the air filter element 2 pre-filters the smaller particles in the airflow. First filter, at the same time, the spray dust reduction component 4 is running, 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 shell 1, the water mist causes part of the impurities in the air flow in the shell 1 to settle and fall into the lower funnel 104, and also reduces the air flow; wherein, the air inlet pipe 101 is connected to the barrel of the plastic dryer, the exhaust cylinder 103 is arranged as a horizontally arranged cylindrical cylinder, the exhaust cylinder 103 is arranged at one end away from the side funnel 102 with an exhaust port, one end of the air filter element 2 is fixed to the exhaust port and the other end extends into the exhaust cylinder 103, the side wall of the shell 1 is installed with a movable cover, which is opened in advance when the equipment is used Cover and inject clean water into the lower funnel 104; when in use, when the plastic dryer is running, the dust-laden airflow enters 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, wherein the metal sieve plate 31 pre-filters the larger particles in the airflow, and the air filter element 2 then filters the smaller particles in the airflow, and at the same time, the spray dust reduction component 4 is also started to operate the water pump 42, and 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, so as to settle the impurities in the airflow in the housing 1, and also cool the airflow, and the airflow settled 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 reduction component 4, when the dust-laden airflow passes through the housing 1, spray dust reduction is first performed, and then the metal sieve plate 31 is used to filter the dust of larger particle size, and finally the air filter element 2 is used to filter the smaller filter element. This multi-stage treatment impurity removal method improves the dust filtering effect and ensures the cleanliness of the dryer output airflow. In addition, during the multi-stage treatment, the parts perform their respective functions, with low loss, not easy to be blocked, long service life, and excellent long-term filtering effect. Secondly, the spray dust reduction method can take away part of the heat in the airflow, so that the heat of the airflow passing through the air filter element 2 is lower, the air filter element 2 is not easily damaged by heat, and the service life of the air filter element 2 is further extended. ;

[0020] Example 2: See Figure 3-Figure 5 , which is different from the above-mentioned embodiment, a strip hole 105 is opened on the top of the shell 1, and the sieve plate assembly 3 also includes a strip plate 32 fixed on the top of the shell 1, and the strip plate 32 covers the strip hole 105, and the top of the metal sieve plate 31 passes through the strip hole 105 and is fixedly connected to the strip plate 32.

[0021] The connection between the strip plate 32 and the shell 1 is sealed, and the strip plate 32 is preferably fixed to the shell 1 by screws. By providing the strip holes 105 and the strip plate 32, the metal sieve plate 31 can be easily disassembled and assembled.

[0022] Example 3, see Figure 3 , Figure 4 , Fig. 9 and Fig.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 the input end of the water pump 42 is also fixedly connected to a liquid filter element 43, and the liquid filter element 43 extends into the lower funnel 104, and the output end of the water pump 42 is fixed to a drain pipe 44, one end of the drain pipe 44 passes through the top wall of the shell 1 and is fixed to the top wall of the shell 1, the end of the drain pipe 44 extends into the shell 1 and is connected to the sprayer 41, and the sprayer 41 includes a hollow rod 411 arranged inside the shell 1, a hose 412 is fixed to the top of the hollow rod 411, and the top of the hose 412 is fixed to the end of the drain pipe 44, a plurality of evenly distributed bent nozzles 413 are fixedly connected to the side of the hollow rod 411, and a plurality of evenly distributed baffles 414 are also installed at the bottom of the hollow rod 411, and the baffles 414 are matched one by one with the bent nozzles 413, and the baffles 414 are located on the output path of the bent nozzles 413.

[0023] Among them, a sewage branch pipe is also fixed on the drain pipe 44, and valves are provided on the drain pipe 44 and the sewage pipe. When the liquid in the lower funnel 104 needs to be replaced, the valve on the drain pipe 44 is closed, and then the valve on the sewage 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, and the water pump 42 sucks and discharges the clean water in the lower funnel 104. The water flows through the drain pipe 44, the hose 412, the hollow tube and the bent nozzle 413 in turn. The fine water flow sprayed by the bent nozzle 413 just sprays to the baffle 414, so that the water flows to disperse around, forming water mist and falling, thereby achieving the effect of dust reduction; by arranging the water pump 42 and the sprinkler 41, a continuous water mist can be formed in the shell 1, which is conducive to achieving the effect of dust reduction and cooling.

[0024] Example 4, see 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, and a main driving assembly 6 is also installed on the strip plate 32, and the main driving assembly 6 is used to drive the brush 5 to rotate and move vertically, so as to clean the metal sieve plate 31, and a driven gear 51 is fixedly connected to the end of the brush 5, and the main driving assembly 6 includes a fixed rack 61 and a movable plate 62, the fixed rack 61 is vertically arranged and fixed to the inner wall of the shell 1, and the fixed rack 61 is meshed with the driven gear 51, and the movable plate 62 is located at the top of the strip plate 32, and a plurality of vertical rods 63 are fixedly connected to the bottom of the strip plate 32, and the vertical rod 63 penetrates the strip plate 32 and extends into the shell 1, and a lower bearing seat 64 is fixed at one end of the vertical rod 63 located inside the shell 1, and the lower bearing seat 64 is rotatably connected to the brush 5, and the main driving assembly 6 also includes two vertical cylinders 65 fixed on the strip plate 32, and the output ends of the two vertical cylinders 65 are fixedly connected to the movable plate 62.

[0025] The brush 5 includes a brush shaft and brush wires, wherein the brush wires are attached to the side wall of the metal sieve plate 31, and four vertical rods 63 are fixed at the bottom of the movable plate 62, two of which form a group and 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 the two brushes 5; when in use, the vertical cylinder 65 is operated and extended, driving the movable plate 62 to move vertically upward, and when the movable plate 62 moves vertically upward, it drives multiple vertical rods 63 to move upward, and when the multiple vertical rods 63 move upward, it drives the lower bearing seat 64 to move upward, and when the lower bearing seat 64 moves upward, it drives the two brushes 5 to move upward, and at the same time, Since the driven gear 51 at the end of the brush 5 is meshed 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 moves upward and rotates at the same time, so as to clean the dust attached to the surface of the metal screen. By arranging the brush 5 and the main drive component 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 component 6 is operated to cause the brush 5 to roll along the metal sieve plate 31, thereby achieving the cleaning function, thereby facilitating the automated maintenance of the metal sieve plate 31 without manual processing, which is more efficient.

[0026] Example 5, see Figure 5-Figure 10, which is different from the above embodiment, a plurality of evenly arranged vertical shafts 415 are fixed to the bottom end of the hollow rod 411, and a worm gear 416 is rotatably connected to the vertical shaft 415, and a support rod 417 is fixedly connected to one side of the worm gear 416, and the baffle 414 is fixed to the end of the support rod 417, and an auxiliary driving assembly 7 is installed on the shell 1, and the auxiliary driving assembly 7 is used to drive the bending nozzle 413 to point to the metal sieve plate 31, and the auxiliary driving assembly 7 is also used to drive the baffle 414 to move, so as to spray water to the metal sieve plate 31, and the auxiliary driving assembly 7 includes two extension plates 71 respectively connected to the two ends of the hollow rod 411, one end of the extension plate 71 is fixedly connected to the end of the hollow rod 411, and the other end of the extension plate 71 is fixedly connected to a base shaft 72, and the base shaft 72 is parallel to the hollow rod 411, and the base shaft 72 passes through the side wall of the shell 1 and is rotatably connected to the side wall of the shell 1, The auxiliary drive assembly 7 also includes a motor 73, a sleeve 74 and a worm 75. The motor 73 is fixed on the outside of the shell 1. The output shaft of the motor 73 is fixed to the end of the base shaft 72. The sleeve 74 is sleeved on the outside of the base shaft 72 and fixedly connected to the inner wall of the shell 1. A driving 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 is meshed with multiple worm wheels 416 at the same time. An adjusting gear 78 is fixed to the end of the worm 75, and the adjusting gear 78 is meshed with the driving gear 76. A slot 311 is opened at the bottom of the metal sieve plate 31. A sealing plate 312 is inserted in 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 on both sides of the sealing plate 312, and the support rods 314 extend to the bottom of the lower bearing seat 64.

[0027] 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 in contact with the bottom of the lower bearing seat 64, the spring 313 is in a stretched state, and the bottom of the sealing plate 312 is in contact with the inner bottom wall of the shell 1. At this time, the brush 5 is respectively located on both sides of the sealing plate 312; when the main drive assembly 6 is running, the brush 5 and the lower bearing seat 64 are driven to move upward, and the tension of the spring 313 makes the sealing plate 312 and the support rod 314 move upward and shrink 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 brush 5 cleans the dust, the dust on the side of the metal sieve plate 31 close to the air filter element 2 can pass through the opening and slide into the lower funnel 104 after falling, which is convenient for the collection of the dust after falling off, and while cleaning the metal sieve plate 31, the spray dust reduction assembly 4 and the auxiliary drive assembly 7 are started. At this time, the motor 73 drives the base shaft 72 to rotate a certain angle, and then The hollow rod 411 and the extension plate 71 are driven to swing around the base shaft 72 at a certain angle, 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 driving rod gear, causing the worm 75 to rotate. When the worm 75 rotates, it simultaneously drives multiple worm wheels 416 to rotate. When the worm wheel 416 rotates, it drives the support rod 417 to swing. When the support rod 417 swings, it drives the baffle 414 to move. After the baffle 414 moves, it disengages from the output direction of the bent nozzle 413, so that the fine water flow sprayed from the bent nozzle 413 no longer forms water mist, but is directly sprayed on the surface of the metal sieve plate 31. By setting the auxiliary driving component 7, when the brush 5 cleans the metal sieve plate 31, the auxiliary driving component 7 can also force the sprayer 41 to aim at the metal sieve plate 31 and spray water. Under the pressure and flow of the water flow, the brush 5 has a better cleaning effect on dust, thereby improving the cleaning efficiency.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 cylinder is fixed to the side of the side funnel away from the shell, an air filter is installed at the end of the exhaust cylinder away from the side funnel, 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, a spray dust reduction assembly is installed on the shell; the sieve plate assembly includes a vertically arranged metal sieve plate, the surface of the metal sieve plate is provided with sieve holes, the metal sieve plate is used to pre-filter large-sized impurities; the lower funnel is used to hold water, and the spray dust reduction assembly includes a A sprayer 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 dust-laden airflow enters the shell through the air inlet pipe, and is discharged after passing through the metal sieve plate and the air filter element in sequence, wherein the metal sieve 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, the water pump transports the water flow in the lower funnel to the sprayer, and the sprayer sprays water mist into the shell, the water mist causes part of the impurities in the airflow in the shell to settle and fall into the lower funnel, and also cools the airflow.

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, and the sieve plate assembly also includes a strip plate fixed on the top of the shell, 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: 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 the drain pipe 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.

4. An air filtering and dust removal device according to claim 3, characterized in that: The sprayer includes a hollow rod arranged inside a shell, a hose is fixed on the top of the hollow rod, the top of the hose is fixed to the end of a drain pipe, a plurality of evenly distributed bent 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 one by one with the bent nozzles, and the baffles are located on the output path of the bent nozzles.

5. An air filtering and dust removal device according to claim 4, characterized in that: Brushes are arranged on both sides of the metal sieve plate, and a main driving assembly is also installed on the strip plate. The main driving assembly is used to drive the brushes to rotate and move vertically, so as to clean the metal sieve plate.

6. An air filtering and dust removal device according to claim 5, characterized in that: A driven gear is fixedly connected to the end of the brush, and 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, and the fixed rack is meshed with the driven gear. The movable plate is located at the top of the strip plate, and a plurality of vertical rods are fixedly connected to the bottom of the strip plate. The vertical rods penetrate the strip plate and extend into the shell. A lower bearing seat is fixed at one end of the vertical rod located inside the shell, and the lower bearing seat is rotatably connected to the brush. The main driving assembly also includes two vertical cylinders fixed to the strip plate, and the output ends of the two vertical cylinders are fixedly connected to the movable plate.

7. An air filtering and dust removal device according to claim 6, characterized in that: 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 drive assembly is installed on the shell, the auxiliary drive assembly is used to drive the bending nozzle to point to the metal sieve plate, and the auxiliary drive assembly is also used to drive the baffle to move, so as to spray water onto the metal sieve plate.

8. An air filtering and dust removal device according to claim 7, characterized in that: 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.

9. An air filtering and dust removing device according to claim 8, 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.

10. 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 1-9.

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