CN108970277B - Air cleaner with self-cleaning function - Google Patents

Abstract

The invention provides an air filter with a self-cleaning function, and belongs to the technical field of dust removal equipment. The filter comprises a cylindrical shell, an end cover, a first-stage filter plate, a second-stage filter plate and a rotating shaft, wherein the end cover is detachably connected to an opening of the shell, the rotating shaft is rotatably connected in the shell, a first-stage filter cavity is formed between the outer wall of the first-stage filter screen and the inner wall of the shell, a second-stage filter cavity is formed between the outer wall of the second-stage filter screen and the inner wall of the filter screen, a filter cavity is formed in the second-stage filter screen, the rotating shaft is positioned in the filter cavity, an air inlet pipe communicated with the first-stage filter cavity is arranged on the shell, and an air outlet pipe communicated with the filter cavity is arranged on the end cover; a turbine is fixedly arranged on the rotating shaft, and the outer ring of the turbine is connected with the air outlet pipe through a bearing; at least one permanent magnet block is fixedly arranged on the rotating shaft, at least one scraping strip is arranged in the secondary filter cavity, and an iron block which can be adsorbed by the permanent magnet block is buried in the scraping strip. The invention has the advantages of automatically removing impurities on the filter plate, and the like.

Description

An air filter with self-cleaning function

Technical field

The invention belongs to the technical field of dust removal equipment and relates to an air filter with a self-cleaning function.

Background technique

The primary filter is suitable for primary filtration of air conditioning systems and is mainly used to filter dust particles above 5 microns. There are three types of primary filters: plate type, pleated type, and bag type.

The outer frame of the filter is composed of a strong waterproof board, which is used to fix the folded filter media. The diagonal design of the outer frame can provide a large filtering area and allow the internal filter material to adhere tightly to the outer frame. The surroundings of the filter are bonded to the outer frame with special professional adhesive glue to prevent air leakage or damage caused by wind resistance pressure. The outer frame of disposable paper frame filters is generally divided into general cardboard frames and high-strength touch-cut cardboard. The filter element is made of pleated fiber filter material and lined with a single-sided metal mesh. It has a beautiful appearance and a sturdy and durable structure. Generally, the cardboard outer frame is used to manufacture non-standard specifications of filters. It can be used to produce filters of any specifications. It has high strength and is not suitable for deformation. High-strength cardboard is used to manufacture standard specifications of filters, which are characterized by high specification accuracy, beautiful appearance and low cost. If imported surface fiber or synthetic fiber filter materials are used, all performance indicators can reach or exceed the imported filter materials.

However, the maintenance of the current plate-type primary air filter and the installation and replacement of the filter are very troublesome and not very practical. Moreover, when a large amount of impurities are attached to the filter, the air filtration effect will become worse, so it is necessary to build on this basis. make further improvements.

Contents of the invention

The purpose of the present invention is to provide an air filter with a self-cleaning function in view of the above-mentioned problems existing in the existing technology. The technical problem to be solved by the present invention is how to enable the scraper to automatically clean the filter plate through the action of air flow. Miscellaneous cleaning.

The object of the present invention can be achieved through the following technical solutions: an air filter with a self-cleaning function, which is characterized in that the filter includes a cylindrical housing, an end cover, a primary filter plate, a secondary filter plate and The rotating shaft, the end cover is detachably connected to the opening of the housing, the rotating shaft is rotatably connected in the housing, a primary filter chamber is formed between the outer wall of the primary filter screen and the inner wall of the housing, and the secondary filter screen A secondary filter cavity is formed between the outer wall and the inner wall of the filter screen. A filter cavity is formed in the secondary filter screen. The rotating shaft is located in the filter cavity. An air inlet pipe connected to the primary filter cavity is provided on the housing. The end cap is provided with an air outlet pipe connected to the filter chamber;

A turbine is fixedly mounted on the rotating shaft, and the outer ring of the turbine is connected to the exhaust pipe through a bearing;

At least one permanent magnet block is fixedly installed on the rotating shaft, and at least one scraper bar is provided in the secondary filter cavity. An iron block that can be adsorbed by the permanent magnet block is embedded in the scraper bar.

The airflow enters the primary filter chamber from the air inlet pipe. After being filtered by the primary filter plate, the large-diameter particles are filtered and then enters the secondary filter chamber. After being filtered by the secondary filter plate, the airflow enters the filter chamber and is finally discharged from the air outlet pipe. The airflow passes through the air outlet pipe and acts on the turbine, causing the turbine to rotate, thereby driving the rotating shaft to rotate. The rotation of the rotating shaft drives the permanent magnet block to absorb the iron block, and has a certain probability to drive the iron block and scraper to rotate in the secondary filter chamber, thus filtering the The inner wall of the primary filter plate and the outer wall of the secondary filter plate are cleaned.

The entire filter does not require external equipment such as electric power, and is directly driven and rotated by the flow of air to achieve automatic impurity removal and cleaning, thereby greatly improving the filtration effect and preventing the primary and secondary filter plates from being clogged.

In the above-mentioned air filter with a self-cleaning function, there are two permanent magnet blocks, and they are symmetrically distributed outside the rotating shaft. The permanent magnet blocks and the rotating shaft are fixedly connected through a connecting arm.

The permanent magnet blocks are symmetrically distributed, which is helpful for the stable rotation of the rotating shaft, and can absorb iron blocks with a greater probability and control the rotation of the scraper in the secondary filter chamber.

In the above-mentioned air filter with a self-cleaning function, there are two scraper strips, and the two scraper strips are fixedly connected by a plurality of annular positioning rods.

In the above-mentioned air filter with self-cleaning function, an iron block is embedded in each scraper, and the two iron blocks are spaced apart in the vertical direction.

The two iron blocks are spaced apart in the vertical direction, and the two permanent magnet blocks are on the same transverse plane. Therefore, during the rotation of the rotating shaft, the permanent magnet strip can drive the scraper bar where the iron block is located longitudinally in the secondary filter chamber. The beating makes the impurity removal path and impurity removal method of the scraper more diverse, and the impurity removal and cleaning effect is better.

In the above-mentioned air filter with a self-cleaning function, the height of the scraper strip is smaller than the height of the secondary filter chamber, and the scraper strip includes a support strip and plastic wires densely attached to the outer surface of the support strip.

In the above-mentioned air filter with a self-cleaning function, a turntable is provided at the bottom of the housing. The upper surface of the turntable is between the bottom of the primary filter plate and the bottom of the secondary filter plate. The turntable is connected to the rotating shaft through a plane bearing, and the turntable is fixedly connected to the rotating shaft; a row of ash pipes is provided on the housing, and a dust accumulation hole is provided on the turntable that can be located on the same straight line as the ash discharge pipe. The dust accumulation hole is connected to the ash discharge pipe. The primary filter chambers are connected to each other through a dust inlet, the dust hole and the secondary filter chamber are connected to each other through a dust inlet, and the dust hole and the filter chamber are connected to each other through a dust inlet. Connected.

Existing filters are unable to actively discharge accumulated dust and impurities. It is necessary to remove the filter to clean or replace the filter plate to remove impurities to ensure the effect of air filtration.

This filter uses the method of intermittent communication between the dust discharge pipe and the dust accumulation hole, so that the dust and impurities filtered out in the primary filter chamber, the secondary filter chamber, and the filter chamber and the impurities scraped by the scraper can pass through the airflow. The dust is discharged from the bottom and the turntable rotates. When the dust discharge pipe does not communicate with the dust accumulation hole, dust accumulates on the upper surface of the turntable. When the dust discharge pipe communicates with the dust accumulation hole, the air flow causes dust and impurities to be quickly discharged to the exhaust pipe. Gray tube, and the discharge volume of air used for filtration is smaller, which will not affect the overall tightness of the filter.

In the above-mentioned air filter with a self-cleaning function, a limit bearing is provided between the inner wall of the housing and the outer edge of the turntable, and the outer ring of the limit bearing is fixedly connected to the inner wall of the housing. The inner ring of the bearing is against the edge of the upper surface of the turntable.

Through the limit bearing, on the one hand, the turntable and the housing can be sealed, and on the other hand, the turntable can be positioned to prevent the turntable from shaking. After all, the rotation of the shaft is not uniform or regular.

In the above-mentioned air filter with a self-cleaning function, a guide plate is fixedly provided on the outer wall of the primary filter plate, and the air inlet pipe faces the guide plate.

The setting of the guide plate is to prevent the inlet airflow from directly acting on the primary filter plate, causing the strong airflow to impact the primary filter plate and the secondary filter plate, affecting the filtration effect.

In the above-mentioned air filter with a self-cleaning function, the end cover is threadedly connected to the housing, and the upper end of the primary filter plate and the upper end of the secondary filter plate are fixedly connected to the end cover.

The entire filter is very easy to disassemble and assemble, and has good stability. The limit bearing is stuck into the housing and does not require a tight interference fit, because the position of the turntable and the rotating shaft are basically fixed, and the limit bearing is only play a supporting role.

Description of drawings

Figure 1 is a schematic structural diagram of this filter.

Figure 2 is an enlarged view of part A in Figure 1.

Figure 3 is a schematic diagram of the connection structure between the scraper strip and the positioning rod.

In the figure, 1. Shell; 2. End cover; 31. Primary filter plate; 32. Secondary filter plate; 33. Rotating shaft; 34. Primary filter chamber; 35. Secondary filter chamber; 36. Filter chamber; 37. Air intake pipe; 38. Air outlet pipe; 39. Turbine; 41. Permanent magnet block; 42. Scraper; 43. Iron block; 44. Positioning rod; 51. Turntable; 52. Ash discharge pipe; 53. Ash accumulation hole ; 54. Ash inlet one; 55. Ash inlet two; 56. Ash inlet three; 57. Limit bearing; 6. Deflector.

Detailed ways

The following are specific embodiments of the present invention combined with the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in Figure 1, this filter includes a cylindrical housing 1, an end cover 2, a primary filter plate 31, a secondary filter plate 32 and a rotating shaft 33. The end cover 2 is detachably connected to the opening of the housing 1. The rotating shaft 33 is rotatably connected in the housing 1. A primary filter chamber 34 is formed between the outer wall of the primary filter and the inner wall of the housing 1. A secondary filter chamber 35 is formed between the outer wall of the secondary filter and the inner wall of the filter. A filter cavity 36 is formed in the filter screen, and the rotating shaft 33 is located in the filter cavity 36. The housing 1 is provided with an air inlet pipe 37 connected to the primary filter cavity 34, and the end cover 2 is provided with an air outlet pipe 38 connected to the filter cavity 36;

A turbine 39 is fixedly provided on the rotating shaft 33, and the outer ring of the turbine 39 is connected to the air outlet pipe 38 through a bearing;

At least one permanent magnet block 41 is fixed on the rotating shaft 33 , and at least one scraper 42 is arranged in the secondary filter chamber 35 . An iron block 43 that can be adsorbed by the permanent magnet block 41 is embedded in the scraper 42 .

The airflow enters the primary filter chamber 34 from the air inlet pipe 37. After being filtered by the primary filter plate 31, the large-diameter particles are filtered and then enters the secondary filter chamber 35. After being filtered by the secondary filter plate 32, the airflow enters the filter chamber 36. Finally, it is discharged from the air outlet pipe 38. The air flow passes through the air outlet pipe 38 and acts on the turbine 39 to rotate the turbine 39, thereby driving the rotating shaft 33 to rotate. The rotation of the rotating shaft 33 drives the permanent magnet block 41 to absorb the iron block 43, and has a certain probability to drive the iron block 43. The block 43 and the scraper 42 rotate in the secondary filter chamber 35 to remove impurities from the inner wall of the primary filter plate 31 and the outer wall of the secondary filter plate 32 .

The entire filter does not require external equipment such as electric power, and is directly driven and rotated by the flow of air to achieve automatic impurity removal and cleaning, thereby greatly improving the filtration effect and preventing the first-level filter plate 31 and the second-level filter plate 32 from being blocked.

There are two permanent magnet blocks 41, and they are symmetrically distributed outside the rotating shaft 33. The permanent magnet blocks 41 and the rotating shaft 33 are fixedly connected through a connecting arm. The permanent magnet blocks 41 are symmetrically distributed, which is helpful for the stable rotation of the rotating shaft 33, and can adsorb the iron blocks 43 with a greater probability, and control the scraper 42 to rotate in the secondary filter chamber 35.

As shown in FIGS. 1 and 3 , there are two scraper strips 42 , and the two scraper strips 42 are fixedly connected through a plurality of annular positioning rods 44 . An iron block 43 is embedded in each scraper 42, and the two iron blocks 43 are spaced apart in the vertical direction. The two iron blocks 43 are spaced apart in the vertical direction, and the two permanent magnet blocks 41 are on the same transverse plane. Therefore, during the rotation of the rotating shaft 33, the permanent magnet strips can drive the scraper strips 42 where the iron blocks 43 are located on both sides. The longitudinal vibration in the filter chamber 35 makes the impurity removal path and impurity removal method of the scraper 42 more diverse, and the impurity removal and cleaning effect is better.

The height of the scraper bar 42 is less than the height of the secondary filter chamber 35. The scraper bar 42 includes a support bar and plastic wires densely attached to the outer surface of the support bar.

As shown in Figures 1 and 2, a turntable 51 is provided at the bottom of the housing 1. The upper surface of the turntable 51 is connected to the bottom of the primary filter plate 31 and the bottom of the secondary filter plate 32 through plane bearings, respectively. The turntable 51 is fixedly connected to the rotating shaft 33; the housing 1 is provided with a row of ash pipes 52, and the turntable 51 is provided with a dust accumulation hole 53 that can be located on the same straight line as the ash discharge pipe 52. The dust accumulation hole 53 is connected to the primary filter chamber 34 They are connected through a dust inlet 54, the dust hole 53 and the secondary filter chamber 35 are connected through a dust inlet two 55, the dust hole 53 and the filter cavity 36 are connected through a dust inlet three 56 .

Existing filters are unable to actively discharge accumulated dust and impurities. The filter needs to be removed to clean or replace the filter plate to remove impurities to ensure the effect of air filtration.

This filter uses the method of intermittent communication between the dust discharge pipe 52 and the dust accumulation hole 53 to allow the dust and impurities filtered out in the primary filter chamber 34, the secondary filter chamber 35, and the filter chamber 36 to be scraped off by the scraper 42. The impurities can be discharged under the action of air flow, and the turntable 51 rotates. When the ash discharge pipe 52 does not communicate with the dust accumulation hole 53, dust accumulates on the upper surface of the turntable 51. When the ash discharge pipe 52 communicates with the dust accumulation hole 53, The air flow causes dust and impurities to be quickly discharged to the dust discharge pipe 52, while the discharge volume of air used for filtration is small, which will not affect the overall tightness of the filter.

A limit bearing 57 is provided between the inner wall of the housing 1 and the outer edge of the turntable 51. The outer ring of the limit bearing 57 is fixedly connected to the inner wall of the housing 1. The inner ring of the limit bearing 57 abuts against the upper surface edge of the turntable 51. . Through the limiting bearing 57, on the one hand, the relationship between the turntable 51 and the housing 1 can be sealed, and on the other hand, the turntable 51 can be positioned to prevent the turntable 51 from shaking. After all, the rotation of the rotating shaft 33 is not uniform or regular.

A baffle 6 is fixedly provided on the outer wall of the primary filter plate 31, and the air inlet pipe 37 faces the baffle 6. The guide plate 6 is arranged to prevent the inlet airflow from directly acting on the primary filter plate 31, causing the strong airflow to impact the primary filter plate 31 and the secondary filter plate 32, thereby affecting the filtration effect.

The end cover 2 is threadedly connected to the housing 1, and the upper end of the primary filter plate 31 and the upper end of the secondary filter plate 32 are fixedly connected to the end cover 2. The entire filter is very easy to disassemble and assemble, and has good stability. The limit bearing 57 is inserted into the housing 1 and does not require a tight interference fit, because the positions of the turntable 51 and the rotating shaft 33 are basically fixed. The position bearing 57 only plays an auxiliary role.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the technical field to which the present invention belongs can make various modifications or additions to the described specific embodiments or adopt similar substitutions, but this will not deviate from the spirit of the present invention or exceed the definition of the appended claims. range.

Claims (7)

1. An air filter with a self-cleaning function, characterized in that the filter includes a cylindrical housing (1), an end cover (2), a primary filter plate (31), and a secondary filter plate (32 ) and the rotating shaft (33), the end cover (2) is detachably connected to the opening of the housing (1), the rotating shaft (33) is rotatably connected in the housing (1), and the primary filter plate ( 31) A primary filter cavity (34) is formed between the outer wall and the inner wall of the housing (1), and a secondary filter cavity (35) is formed between the outer wall of the secondary filter plate (32) and the inner wall of the primary filter plate (31). , a filter cavity (36) is formed in the secondary filter plate (32), the rotating shaft (33) is located in the filter cavity (36), and the housing (1) is provided with a connecting primary filter cavity (34) The air inlet pipe (37) is provided with an air outlet pipe (38) connected to the filter chamber (36) on the end cover (2); A turbine (39) is fixedly provided on the rotating shaft (33), and the outer ring of the turbine (39) is connected to the air outlet pipe (38) through a bearing; At least one permanent magnet block (41) is fixedly provided on the rotating shaft (33), and at least one scraper (42) is provided in the secondary filter cavity (35). A scraper (42) is embedded in the scraper (42). An iron block (43) that can be adsorbed by the permanent magnet block (41); A guide plate (6) is fixedly provided on the outer wall of the primary filter plate (31), and the air inlet pipe (37) faces the guide plate (6); The end cover (2) is threadedly connected to the housing (1), and the upper end of the primary filter plate (31) and the upper end of the secondary filter plate (32) are fixedly connected to the end cover (2). 2. An air filter with self-cleaning function according to claim 1, characterized in that there are two permanent magnet blocks (41), and they are symmetrically distributed outside the rotating shaft (33). (41) is fixedly connected to the rotating shaft (33) through a connecting arm. 3. An air filter with a self-cleaning function according to claim 2, characterized in that there are two scraper strips (42), and several annular positioning rods are passed between the two scraper strips (42). (44) Fixed connection. 4. An air filter with a self-cleaning function according to claim 3, characterized in that an iron block (43) is embedded in each scraper (42), and the two iron blocks (43) are vertically spacing in the direction. 5. An air filter with a self-cleaning function according to claim 4, characterized in that the height of the scraper (42) is smaller than the height of the secondary filter chamber (35). It includes support strips and plastic wires densely attached to the outer surface of the support strips. 6. An air filter with a self-cleaning function according to claim 1 or 2 or 3 or 4 or 5, characterized in that a turntable (51) is provided at the bottom of the housing (1), and the turntable The upper surface of (51) is connected to the bottom of the primary filter plate (31) and the bottom of the secondary filter plate (32) respectively through plane bearings, and the rotating disk (51) is fixedly connected to the rotating shaft (33); The housing (1) is provided with an ash discharge pipe (52), and the turntable (51) is provided with an ash accumulation hole (53) that can be located on the same straight line as the ash discharge pipe (52). The hole (53) and the primary filter cavity (34) are connected through a dust inlet (54), and the dust accumulation hole (53) and the secondary filter cavity (35) are connected through a dust inlet (2). 55) are connected, and the dust accumulation hole (53) and the filter cavity (36) are connected through a dust inlet three (56). 7. An air filter with a self-cleaning function according to claim 6, characterized in that a limiting bearing (57) is provided between the inner wall of the housing (1) and the outer edge of the turntable (51), so The outer ring of the limit bearing (57) is fixedly connected to the inner wall of the housing (1), and the inner ring of the limit bearing (57) abuts against the upper surface edge of the turntable (51).