A parallel centrifugal fan

Abstract

The present invention relates to the field of fan technology, and specifically to a parallel centrifugal fan, comprising a fan body, an air intake pipe connected to the inlet of the fan body, and an air intake port arranged on the upper part of one side of the air intake pipe; and also comprising an annular frame, a filter ball, an annular brush plate and a rotating plate; through the cooperation of the filter ball, the rotating plate and the annular brush plate, the fan body can automatically filter dust and impurities in the air when it is in action, and can automatically clean the surface of the filter ball, so that dust and impurities can only be temporarily stored in a specified interval, ensuring that the rest of the surface of the filter ball in the dust and impurity storage interval is clean, and the air filtration efficiency and air intake are guaranteed by the clean surface, thereby reducing the frequency of fan body shutdown cleaning, and at the same time, no additional electrical equipment control and auxiliary cleaning are required, thereby reducing operation and maintenance costs.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a parallel centrifugal fan. Background Art

[0002] The air inlet of the fan is usually equipped with a filter to reduce the dust and impurities in the air from entering the fan, reduce the wear of the internal components of the fan, and improve the operating efficiency of the fan; therefore, after the fan has been used for a long time, the problem of filter clogging is more common. At the same time, the cleaning of the filter is also more mature (such as regular cleaning by manual and electrical equipment).

[0003] However, the existing fan air inlet filter cleaning still has the following problems:

[0004] Currently, the blockage is alleviated by moving or vibrating the filter, but the fan is not in a stopped state. At this time, as the air continues to pass through the filter, the dust and impurities that are shaken off will be lifted up and adhere to the surface of the filter again, causing partial blockage of the filter (or large-area blockage), hindering the circulation of air, resulting in a reduction in the amount of air entering the fan, which in turn affects the performance and working efficiency of the fan. Summary of the invention

[0005] The present invention provides a parallel centrifugal fan, which can automatically reduce the blockage and distribute it completely on the filter screen, ensure the cleanliness of a larger area of ​​the filter screen, increase the speed of airflow passing through the filter screen, and reduce operation and maintenance costs. The specific scheme is as follows:

[0006] A parallel centrifugal fan comprises a fan body, an air inlet pipe connected to the inlet of the fan body, and an air inlet port arranged at the upper part of one side of the air inlet pipe; it also comprises an annular frame, a filter ball, an annular brush plate and a rotating plate; the annular frame is installed inside the air inlet pipe, and the outer ring surface of the annular frame fits the inner wall of the air inlet pipe; the filter ball is spherical as a whole, and is specifically composed of a spherical skeleton and a filter mesh wrapped around the outside of the spherical skeleton; the filter ball is rotatably installed inside the annular frame by a rotating rod, and the side surface of the filter ball always fits the inner ring surface of the annular frame; the annular brush plate is concentrically arranged with the annular frame and rotatably installed on a side of the annular frame adjacent to the air inlet port of the air inlet pipe, and the side edge of the annular brush plate away from the annular frame always fits the surface of the filter ball; the side edge of the annular brush plate away from the annular frame also has a plurality of bristles radially and circumferentially distributed thereon that fit the surface of the filter ball; the rotating plate is located inside the filter ball as a whole, and there are a plurality of rotating plates, which are equidistantly distributed on the side of the rotating rod.

[0007] Furthermore, the outer ring surface of the annular brush plate is also sleeved with a gear ring; a gear meshing with the gear ring is installed on the intake pipe through a shaft; the adjacent ends of the rotating rod and the shaft rod extend to the outside of the intake pipe, and the extended ends of the rotating shaft and the shaft rod are connected through a pulley assembly.

[0008] Furthermore, the annular brush plate is provided with a plurality of through openings distributed around its circumference; a filter screen is provided in each of the through openings, and a surface of the filter screen is flush with a surface of one side of the annular brush plate adjacent to the air inlet of the air inlet pipe.

[0009] Furthermore, a liquid storage box is installed at the bottom of the air intake pipe, and the liquid storage box as a whole is located between the annular brush plate and the air inlet of the air intake pipe, and one side of the liquid storage box is fitted with the surface of the annular brush plate; an opening is also provided on the side of the liquid storage box that is fitted with the annular brush plate; the opening specifically includes a front inlet and a left inlet that are connected to each other; the front inlet is arranged on the front end surface of the liquid storage box and is connected to the interior of the liquid storage box; the left inlet is arranged on the side surface of the liquid storage box that is fitted with the annular brush plate, and is connected to the interior of the liquid storage box.

[0010] Furthermore, a moving block is provided inside the liquid storage box; a plurality of wiping strips are equidistantly installed on one side of the moving block facing the annular brush plate; wherein the wiping strips are used to wipe the surface of the filter screen.

[0011] Furthermore, a U-shaped plate is slidably installed on one side of the liquid storage box away from the annular brush plate; one end of the U-shaped plate located inside the liquid storage box is fixedly connected to the moving block; the other end of the U-shaped plate is located above the liquid storage box, and a wedge block is installed on the end; a plurality of extrusion blocks with the same number as the filter screen are distributed circumferentially on the annular brush plate; a return spring is also provided above the liquid storage box, and the return spring is used to connect the U-shaped plate and the liquid storage box; wherein the wedge block is located on the rotation path of the extrusion block, and the two form an extrusion fit, so that the U-shaped plate forms a lateral movement.

[0012] Furthermore, a liquid spraying tube is installed at the top of the movable block through a telescopic tube, and the nozzle of the liquid spraying tube is vertically facing downward; a piston tube is also installed horizontally on the side of the liquid storage box away from the annular brush plate; a piston rod is installed inside the piston tube, and the rod part of the piston rod extends toward the liquid storage box and is located outside the piston tube; the tail of the piston tube is connected to the bottom of the liquid storage box through a one-way liquid inlet valve tube; the tail of the piston tube is also connected to the liquid spraying tube through a one-way liquid outlet valve tube; wherein, the movement of the U-shaped plate is used to push the piston rod to move horizontally in the piston tube.

[0013] Furthermore, a C-shaped plate is installed at the end of the piston rod, and the C-shaped plate includes a left contact portion and a right contact portion, and the bent portion of the U-shaped plate is located between the left contact portion and the right contact portion.

[0014] Furthermore, a filter head is also provided at the inlet of the one-way liquid inlet valve tube.

[0015] Compared with the prior art, the present invention can at least achieve the following beneficial effects:

[0016] The device increases the air filtering area by setting the filter ball, and the spherical convex surface of the filter ball located between the annular frame and the air inlet of the air inlet pipe, thereby ensuring the filtering effect of dust impurities in the air and the speed at which the air enters the fan body;

[0017] And through the coordination of the filter ball, rotating plate and annular brush plate, the fan body can automatically filter dust and impurities in the air when it is in operation. The surface of the filter ball can be automatically cleaned without the intervention of manual labor and additional electrical equipment, and the dust and impurities can only be temporarily stored in the specified interval (the interval near the junction of the filter ball and the annular brush plate), ensuring that the rest of the surface of the filter ball except the dust and impurity storage interval is clean. The clean surface ensures the efficiency of air filtration and the amount of air entering, reduces the frequency of fan body shutdown for cleaning, and does not require additional electrical equipment control and auxiliary cleaning, thereby reducing operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 Schematic diagram of the internal structure of the air intake pipe of the present invention.

[0021] Figure 3 It is a schematic diagram of the internal structure of the filter ball of the present invention.

[0022] Figure 4 For the present invention Figure 2 Schematic diagram of the front view structure.

[0023] Figure 5 For the present invention Figure 3 Schematic diagram of the local structure.

[0024] Figure 6 It is a schematic diagram of the axial structure of the filter ball of the present invention.

[0025] Figure 7 For the present invention Figure 6 Another perspective structural diagram of .

[0026] Figure 8 It is a schematic diagram of the structure of the filter screen of the present invention entering into the liquid storage box from the opening.

[0027] Fig. 9 For the present invention Figure 8Schematic diagram of the liquid storage box from another perspective.

[0028] Fig.10 Schematic diagram of the internal structure of the liquid storage box of the present invention.

[0029] Fig.11 For the present invention Fig.10 Schematic diagram of another state of the moving block.

[0030] The reference numerals are as follows:

[0031] 1. Fan body; 101. Air inlet pipe;

[0032] 2. annular frame; 201. filter ball; 202. rotating rod; 203. annular brush plate; 204. rotating plate;

[0033] 3. Ring gear; 301. Gear;

[0034] 4. filter screen; 401. liquid storage box; 402. opening; 402a. front inlet; 402b. left inlet; 403. moving block; 404. wiping strip;

[0035] 5. U-shaped plate; 501. wedge block; 502. extrusion block; 503. return spring;

[0036] 6. Liquid spraying pipe; 601. Telescopic pipe; 602. Piston pipe; 603. Piston rod; 604. C-type plate; 604a. Left contact part; 604b. Right contact part. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Embodiment: At present, the method of cleaning the air inlet filter of the fan is relatively mature, but it is usually cleaned with the help of electrical components such as motors (such as a motor driving a brush to frequently clean the mesh surface, etc.); and the filter is often blocked when the fan is in working state, and the cleaning process is actually difficult. For example, when the fan is stopped for cleaning, it will affect the operation of the fan; when the fan is not stopped for cleaning, dust will be raised near the filter and cover the filter again with the introduction of airflow (that is, the blockage always exists). For this reason, our company has made the following improvements.

[0039] Please refer to Figures 1 to 11As shown, the present invention provides a parallel centrifugal fan, including a fan body 1, an air inlet pipe 101 connected to the inlet of the fan body 1, the length of the air inlet pipe 101 in the figure is only for illustration, and different lengths can be set according to actual use needs, and an air inlet is arranged at the upper part of one side of the air inlet pipe 101; it also includes an annular frame 2, a filter ball 201, an annular brush plate 203 and a rotating plate 204;

[0040] Among them, the annular frame 2 is installed inside the air inlet pipe 101, and the outer ring surface of the annular frame 2 is in contact with the inner wall of the air inlet pipe 101; the filter ball 201 is spherical as a whole, and is specifically composed of a spherical skeleton and a filter screen wrapped outside the spherical skeleton. The spherical skeleton is used to support the filter screen. The mesh number of the filter screen can be set according to needs. The filter screen is mainly used to reduce dust and impurities from entering the fan body 1; the filter ball 201 is rotatably installed inside the annular frame 2 through a rotating rod 202, and the side surface of the filter ball 201 is always in contact with the inner ring surface of the annular frame 2 to ensure that the air only passes through the filter holes on the surface of the filter ball 201 to separate dust and impurities in the air; the annular brush plate 203 is concentrically arranged with the annular frame 2, and is rotatably installed on a side of the annular frame 2 adjacent to the air inlet of the air inlet pipe 101, and the edge of the annular brush plate 203 on one side away from the annular frame 2 is always in contact with the surface of the filter ball 201; the edge of the annular brush plate 203 on one side away from the annular frame 2 is also radially circumferentially distributed with a plurality of bristles (not shown in the figure) that are in contact with the surface of the filter ball 201;

[0041] By setting the filter ball 201, as Figure 2 As shown, on the one hand, the spherical convex surface of the filter ball 201 located between the annular frame 2 and the inlet of the air inlet pipe 101 can increase the area of ​​air filtration, ensure the filtering effect of dust impurities in the air and the speed of air entering the fan body 1 (relative to the existing flat filter, the number of filter holes is increased); on the other hand, as Figure 2 and Figure 6 As shown, the dust impurities filtered out by the filter ball 201 will move along the curved surface of the filter ball 201 toward the annular brush plate 203, and be temporarily stored at the junction of the annular brush plate 203 and the filter ball 201, thereby ensuring the cleanliness of the remaining surface of the filter ball 201 through temporary storage, thereby improving the efficiency of introducing air from the air inlet pipe 101 into the fan body 1.

[0042] like Figure 3As shown, the rotating plate 204 is entirely located inside the filter ball 201, and there are multiple rotating plates 204, which are equidistantly distributed on the side of the rotating rod 202. Since the rotating plate 204 is located inside the air inlet pipe 101, as the air flow continues to be introduced from the upper air inlet of the air inlet pipe 101, the flow of the air flow will drive the rotating plate 204, the rotating rod 202 and the filter ball 201 to rotate counterclockwise. It is worth noting that the rotation speed of the rotating rod 202 can be controlled by damping, and the rotation speed of the rotating rod 202 can be adjusted according to actual needs, that is, the rotation speed of the filter ball 201 is adjustable, which is a well-known technology and will not be repeated.

[0043] When working: Refer to Figure 1 , Figure 2 and Figure 4 As shown, first, the fan body 1 is in motion, and the external air is sucked through the air inlet pipe 101, and the air flow is filtered by the filter ball 201 in advance, so as to achieve the effect of air filtering, reduce the dust and impurities entering the interior of the fan body 1, and improve the service life of the internal components of the fan body 1;

[0044] Secondly, the spherical convex surface of the filter ball 201 located between the annular frame 2 and the inlet of the air inlet pipe 101 can increase the area of ​​the filter ball 201 for filtering air, thereby ensuring the filtering effect of dust impurities in the air and the speed of air entering the fan body 1; and the dust impurities filtered by the filter ball 201 will move along the arc surface of the filter ball 201 and be temporarily stored at the junction of the annular brush plate 203 and the filter ball 201, thereby ensuring the cleanliness of the remaining surface of the filter ball 201 by temporarily storing it, and improving the efficiency of introducing air from the air inlet pipe 101 into the fan body 1;

[0045] At the same time, if Figure 3 and Figure 6 As shown, continuous inflow of air will push the rotating plate 204 to rotate, and the rotating plate 204 will drive the rotating rod 202 and the filter ball 201 to rotate. Since the annular frame 2 and the annular brush plate 203 are in contact with the surface of the filter ball 201, the annular brush plate 203 can wipe the surface of the filter ball 201 during the rotation process, thereby cleaning the dust impurities with strong adhesion on the surface of the filter ball 201 (such as particles, dust, oil, fibers, etc. captured by the filter ball 201 and retained on its surface), so that the cleaned dust impurities are temporarily stored at the junction of the filter ball 201 and the annular brush plate 203, thereby ensuring that the surface of the filter ball 201 except the junction is relatively clean, thereby improving the air filtering efficiency and air intake of the filter ball 201;

[0046] In summary, due to the coordination of the filter ball 201, the rotating plate 204 and the annular brush plate 203, the fan body 1 can automatically filter the dust and impurities in the air when it is in operation, and can automatically clean the surface of the filter ball 201, so that the dust and impurities can only be temporarily stored in a specified interval (near the junction of the filter ball 201 and the annular brush plate 203), and the rest of the surface of the filter ball 201 is kept clean. The clean surface of the filter ball 201 ensures the efficiency of air filtration and the amount of air entering, reduces the frequency of shutdown for cleaning, and reduces operation and maintenance costs.

[0047] Reference Figure 2 , Figure 5 and Figure 6 , in order to further improve the cleanliness of the surface of the filter ball 201; for this purpose, the outer ring surface of the annular brush plate 203 is also sleeved with a gear ring 3; a gear 301 meshing with the gear ring 3 is installed on the intake pipe 101 through a shaft; the rotating rod 202 and the adjacent end of the shaft rod are extended to the outside of the intake pipe 101, and the extended ends of the rotating rod 202 and the shaft rod are connected by a pulley assembly (shown in the figure, but not numbered);

[0048] During operation: on the basis of the rotation of the rotating rod 202, the rotating rod 202 can also drive the gear 301 to rotate through the pulley assembly, and the gear 301 can drive the meshing ring gear 3 to rotate, and the ring gear 3 can drive the annular brush plate 203 fixedly connected thereto to rotate on the annular frame 2; on the one hand, on the basis of the annular brush plate 203 cleaning the rotating filter ball 201, by giving the annular brush plate 203 an additional rotation action (such as Figure 6 As shown in the figure, the filter ball 201 is dynamically wiped and cleaned, so that the filter ball 201 is cleaned in multiple dimensions, and the bristles of the annular brush plate 203 contact and clean the filter screen on the surface of the rotating filter ball 201 from different angles, so as to ensure the cleanliness of the surface of the filter ball 201 and increase the speed of air passing through the filter ball 201; on the other hand, due to the difference in the number of teeth between the gear 301 and the ring gear 3, when the rotating rod 202 drives the gear 301 to rotate through the pulley assembly, the ring gear 3 and the annular brush plate 203 can rotate at a relatively low speed; That is, the rotation speed of the annular brush plate 203 is lower than the rotation speed of the filter ball 201; that is, when the fan body 1 is in motion and causes the filter ball 201 to rotate, the rotation speed difference between the annular brush plate 203 and the filter ball 201 can improve the cleaning effect. At the same time, the bristles of the rotating annular brush plate 203 clean the filter screen on the surface of the filter ball 201 from different angles. The relatively low-speed rotation of the annular brush plate 203 can reduce the frequency of friction between the bristles of the annular brush plate 203 and the filter screen on the surface of the filter ball 201, which can improve the service life of the filter screen on the surface of the filter ball 201 to a certain extent.

[0049] Reference Figure 2 , Figure 6 and Figure 7As shown, the annular brush plate 203 is provided with a plurality of through openings distributed on the circumference; a filter screen 4 is provided in each through opening. It is worth noting that the size of the filter screen 4 in the figure is only for illustration and can be set according to actual needs, and the surface of the filter screen 4 is flush with the surface of one side of the annular brush plate 203 adjacent to the air inlet of the air inlet pipe 101;

[0050] During operation: the air flow entering from the air inlet pipe 101 can also pass through the multiple filter screens 4 on the annular brush plate 203. The dust impurities located near the junction between the filter ball 201 and the annular brush plate 203 will cling to the surface of the filter screen 4 as the air flow passes, thereby improving the storage effect of the dust impurities and reducing the possibility of the dust impurities spreading everywhere.

[0051] Reference Figure 2 , Figure 8 and Fig. 9 As shown, in order to realize self-cleaning of dust and impurities on the surface of the filter screen 4; for this purpose, a liquid storage box 401 injected with cleaning water is installed at the bottom of the air intake pipe 101, and the liquid storage box 401 is located as a whole between the annular brush plate 203 and the air inlet of the air intake pipe 101, and one side of the liquid storage box 401 is in contact with the surface of the annular brush plate 203; the side of the liquid storage box 401 in contact with the annular brush plate 203 is also provided with an opening 402, and the opening 402 is specifically arranged on the side of the liquid storage box 401 facing the rotation direction of the annular brush plate 203; the opening 402 specifically includes a front inlet 402a and a left inlet 402b that are interconnected; the front inlet 402a is arranged on the front end surface of the liquid storage box 401, and is communicated with the interior of the liquid storage box 401; the left inlet 402b is arranged on the side surface of the liquid storage box 401 in contact with the annular brush plate 203, and is communicated with the interior of the liquid storage box 401;

[0052] During operation: Since the inner wall of one side of the liquid storage box 401 is in contact with the surface of the annular brush plate 203, as the annular brush plate 203 rotates (counterclockwise, such as Figure 6 As shown in the figure), dust and impurities attached to the surface of the filter screen 4 on the annular brush plate 203 will enter the liquid storage box 401 from the opening 402 together with the rotation of the filter screen 4, and will be scraped by the part of the liquid storage box 401 that is in contact with the annular brush plate 203, so that the impurities attached to the filter screen 4 will fall into the internal storage of the liquid storage box 401 during the scraping process; in this way, the attachment of dust and impurities on multiple filter screens 4 on the surface of the annular brush plate 203 is reduced, and the air can pass through the filter screen 4 normally, so that the air flow drives the dust cleaned off the filter ball 201 to always adhere to and be stored in the filter screen 4, reducing the possibility of dust spreading everywhere (avoiding dust spreading and covering the surface of the filter ball 201 again), and at the same time, dust and impurities are collected, ensuring the speed of air circulation entering the fan body 1, thereby improving the working efficiency of the fan body 1.

[0053] Reference Figure 8 and Fig. 9 As shown, a moving block 403 is provided inside the liquid storage box 401; a plurality of vertically arranged wiping strips 404 are equidistantly installed on one side of the moving block 403 facing the annular brush plate 203, and the wiping strips 404 can be made of wear-resistant sponge material; wherein the plurality of wiping strips 404 are used to wipe the surface of the filter screen 4 rotating with the annular brush plate 203;

[0054] During operation: on the basis of the relatively low-speed rotation of the annular brush plate 203 , it can drive the multiple filter screens 4 to rotate and keep in contact with the wiping strips 404 , and the cleaning effect on the surface of the filter screens 4 can be further improved through the wiping strips 404 .

[0055] Reference Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, a U-shaped plate 5 is slidably installed on one side of the liquid storage box 401 away from the annular brush plate 203; one end of the U-shaped plate 5 located inside the liquid storage box 401 is fixedly connected to the moving block 403; the other end of the U-shaped plate 5 is located above the liquid storage box 401, and a wedge block 501 is fixedly installed on the end; a plurality of extrusion blocks 502 with the same number as the filter screen 4 are distributed circumferentially on the annular brush plate 203; a return spring 503 is also provided above the liquid storage box 401, and the return spring 503 is used to connect the U-shaped plate 5 and the liquid storage box 401; wherein the wedge block 501 is located on the rotation path of the extrusion block 502, and the two form an extrusion fit, and the extrusion block 502 can form an extrusion after contacting with the wedge surface of the wedge block 501, and the U-shaped plate 5 forms a lateral movement along the length direction of the intake pipe 101;

[0056] During operation: on the basis of the relatively low-speed rotation of the annular brush plate 203, the annular brush plate 203 can drive the extrusion block 502 to be in extrusion contact with the wedge block 501 (as shown in FIG. Figure 8 As shown, the specific contact schematic state is not shown in the figure), the wedge block 501 and the U-shaped plate 5 after being squeezed form a lateral movement along the length direction of the intake pipe 101, and after the squeezing block 502 is out of contact with the wedge block 501, the wedge block 501 and the U-shaped plate 5 can be reset by the reset spring 503, that is, the U-shaped plate 5 can form a lateral reciprocating movement during the above-mentioned action process; that is, after the wiping strip 404 and the corresponding filter screen 4 are wiped, the squeezing cooperation of the squeezing block 502 and the wedge block 501 can make the U-shaped plate 5 drive the moving block 403 and multiple wiping strips 404 to shrink synchronously into the liquid storage box 401, and the impurities attached to the surface of the wiping strip 404 can fall into the internal storage of the liquid storage box 401 by gravity, so as to avoid the impurities always being attached to the filter screen 4 / wiping strip 404, and at the same time of improving the surface cleaning of the filter screen 4, avoid the impurities from continuously causing wear to both the filter screen 4 and the wiping strip 404.

[0057] Reference Fig. 9, Fig.10 and Fig.11 As shown, a liquid spraying tube 6 is installed at the top of the moving block 403 through a telescopic tube 601, and the nozzle of the liquid spraying tube 6 is vertically downward, wherein the telescopic tube 601 is specifically composed of two mutually sleeved tube bodies, and a spring is arranged at the connection between the two. The specific function is that when the liquid spraying tube 6 contacts the annular brush plate 203, the liquid spraying tube 6 can be fitted through the telescopic tube 601, and when the liquid spraying tube 6 does not contact the annular brush plate 203, the liquid spraying tube 6 can be moved to the top of the wiping strip 404 through the telescopic tube 601; a piston tube 602 is also horizontally installed on the side of the liquid storage box 401 away from the annular brush plate 203; the inner part of the piston tube 602 A piston rod 603 is installed at the bottom, and the rod part of the piston rod 603 extends toward the liquid storage box 401 and is located outside the piston tube 602; the tail of the piston tube 602 is connected to the bottom of the liquid storage box 401 through a one-way liquid inlet valve tube (not shown in the figure); the tail of the piston tube 602 is also connected to the liquid spray pipe 6 through a one-way liquid outlet valve tube (not shown in the figure); wherein, the movement of the U-shaped plate 5 pushes the piston rod 603 to move laterally in the piston tube 602 through the connecting piece; it is worth noting that the cooling water liquid in the liquid storage box 401 can be replenished manually or automatically by additional equipment, which is a well-known technology and will not be repeated.

[0058] During operation: on the basis of the lateral reciprocating movement of the U-shaped plate 5, when the U-shaped plate 5 moves toward the piston tube 602, the U-shaped plate 5 can push the piston rod 603 to be retracted into the piston tube 602, thereby squeezing the liquid previously drawn into and stored in the piston tube 602, so that the liquid is output to the spray pipe 6 through the one-way liquid outlet valve pipe, and is sprayed onto the surface of the wiping strip 404 through the spray pipe 6; conversely, during the resetting process of the U-shaped plate 5, the piston rod 603 can be moved toward the U-shaped plate 5, and the liquid in the liquid storage box 401 can be drawn into the piston tube 602 through the one-way liquid inlet valve pipe at the tail of the piston tube 602; on the one hand, the surface of the wiping strip 404 can be cleaned by the spraying of liquid, thereby ensuring the strength of the clean wiping strip 404 in cleaning the filter screen 4 next time; on the other hand, the surface of the wiping strip 404 can be made moist by spraying the cleaning water liquid, thereby giving the wiping strip 404 a certain adsorption capacity (Since the adhesion of water will absorb dust and impurities), when the wiping strips 404 wipe the surface of the filter 4 next time, the wet and clean multiple wiping strips 404 can facilitate the wiping and adhesion of dust, thereby improving the cleaning effect of the surface of the filter 4; at the same time, it is also convenient for fiber-like impurities (fluff, etc.) to be kneaded into balls / strips when in continuous friction contact with the multiple wiping strips 404. When the wiping strips 404 move horizontally next time, the dust and kneaded fiber impurities can be sprayed by gravity and the liquid spraying pipe 6, so that the impurities fall into the liquid storage box 401 and form an automatic collection effect. After the dust impurities and the cleaning water inside the liquid storage box 401 are mixed together, the dust impurities are collected while the possibility of dust spreading again is solved. The sewage in the liquid storage box 401 only needs to be treated regularly (the specific treatment method can be manual disassembly of the liquid storage box 401 for treatment, etc., which is a well-known technology and will not be repeated).

[0059] Reference Fig.10 and Fig.11 As shown, a C-shaped plate 604 is also installed at the end of the piston rod 603, and the C-shaped plate 604 includes a left contact portion 604a and a right contact portion 604b, and the bent portion of the U-shaped plate 5 is located between the left contact portion 604a and the right contact portion 604b;

[0060] During operation: through the setting of the C-shaped plate 604, the C-shaped plate 604 serves as a connecting piece between the U-shaped plate 5 and the piston rod 603. During the reciprocating movement of the U-shaped plate 5, the reciprocating movement of the piston rod 603 in the piston tube 602 is synchronously realized;

[0061] However, the difference is that the C-shaped plate 604 has a left contact portion 604a and a right contact portion 604b, and the bent portion of the U-shaped plate 5 is located between the left contact portion 604a and the right contact portion 604b;

[0062] That is to say, when the U-shaped plate 5 drives the moving block 404 and the wiping strip 404 to move toward the piston tube 602, the U-shaped plate 5 will come into contact with the right contact portion 604b of the C-shaped plate 604 only after moving a certain distance. At this time, the liquid in the piston tube 602 begins to be pushed by the U-shaped plate 5, the C-shaped plate 604 and the piston rod 603 and is sprayed out from the liquid spraying pipe 6; on the one hand, after the wiping strip 404 located on the U-shaped plate 5 moves a certain distance with the U-shaped plate 5, the wiping strip 404 will form a certain distance with the filter screen 4, and the liquid spraying pipe 6 starts to discharge liquid downwards, which just forms a contact with the surface of the wiping strip 404 On the other hand, the wiping strip 404 is located inside the liquid storage box 401 after moving a certain distance (the wiping strip 404 is in contact with the surface of the annular brush plate 203 / filter screen 4 in the initial state, that is, in the initial state, the wiping strip 404 is located outside the liquid storage box 401), and the liquid spraying cleaning of the wiping strip 404 by the liquid spraying tube 6 at this time can make the cleaned liquid and impurities separated from the wiping strip 404 fall exactly into the liquid storage box 401, thereby improving the collection effect of the falling cleaning liquid and dust impurities.

[0063] Furthermore, a filter head (not shown) is provided at the inlet of the one-way liquid inlet valve tube, and the filter head is used to filter impurities in the sewage in the liquid storage box 401 to ensure that the liquid drawn into the liquid storage box 401 by the piston tube 602 is relatively clean.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A parallel centrifugal fan, comprising a fan body (1), an air inlet pipe (101) connected to an inlet of the fan body (1), and an air inlet port arranged on one side of the air inlet pipe (101); Features: Also includes, The annular frame (2) is installed inside the air intake pipe (101), and the outer annular surface of the annular frame (2) is in contact with the inner wall of the air intake pipe (101); The filter ball (201) is spherical in shape as a whole, and is specifically composed of a spherical frame and a filter mesh wrapped outside the spherical frame; The filter ball (201) is rotatably mounted inside the annular frame (2) via a rotating rod (202), and the side surface of the filter ball (201) is always in contact with the inner annular surface of the annular frame (2); An annular brush plate (203) is arranged concentrically with the annular frame (2) and is rotatably mounted on a side of the annular frame (2) adjacent to an air inlet of the air inlet pipe (101), wherein an edge of the annular brush plate (203) on a side away from the annular frame (2) is always in contact with the surface of the filter ball (201); A plurality of bristles that are in contact with the surface of the filter ball (201) are radially and circumferentially distributed on the edge of one side of the annular brush plate (203) away from the annular frame (2); A rotating plate (204) is entirely located inside the filter ball (201), and a plurality of rotating plates (204) are provided and are equidistantly distributed on the side surface of the rotating rod (202); The outer ring surface of the annular brush plate (203) is also sleeved with a gear ring (3); A gear (301) meshing with the ring gear (3) is mounted on the air intake pipe (101) via a shaft; The rotating rod (202) and the adjacent ends of the shaft rod both extend to the outside of the air intake pipe (101), and the extended ends of the rotating rod (202) and the shaft rod are connected via a pulley assembly; The annular brush plate (203) has a plurality of through openings distributed on the circumference thereof; A filter screen (4) is disposed in each of the through openings, and a surface of the filter screen (4) is flush with a surface of a side of the annular brush plate (203) adjacent to the air inlet of the air inlet pipe (101); A liquid storage box (401) is installed at the bottom of the air intake pipe (101), and the liquid storage box (401) is located as a whole between the annular brush plate (203) and the air inlet of the air intake pipe (101), and one side of the liquid storage box (401) is in contact with the surface of the annular brush plate (203); The side of the liquid storage box (401) that is in contact with the annular brush plate (203) is also provided with an opening (402); The opening (402) specifically includes a front inlet (402a) and a left inlet (402b) that are connected to each other; The front inlet (402a) is arranged on the front end surface of the liquid storage box (401) and is communicated with the interior of the liquid storage box (401); The left inlet (402b) is arranged on a side surface of the liquid storage box (401) which is in contact with the annular brush plate (203), and is communicated with the interior of the liquid storage box (401); A moving block (403) is provided inside the liquid storage box (401); A plurality of wiping strips (404) are equidistantly mounted on one side of the moving block (403) facing the annular brush plate (203); Wherein, the wiping strip (404) is used to wipe the surface of the filter screen (4); A U-shaped plate (5) is slidably mounted on a side of the liquid storage box (401) away from the annular brush plate (203); One end of the U-shaped plate (5) located inside the liquid storage box (401) is fixedly connected to the moving block (403); The other end of the U-shaped plate (5) is located above the liquid storage box (401), and a wedge block (501) is installed at the end; A plurality of extrusion blocks (502) whose number is the same as that of the filter screen (4) are distributed circumferentially on the annular brush plate (203); A return spring (503) is also provided above the liquid storage box (401), and the return spring (503) is used to connect the U-shaped plate (5) and the liquid storage box (401); The wedge block (501) is located on the rotation path of the extrusion block (502), and the two form an extrusion fit, so that the U-shaped plate (5) moves laterally.

2. The parallel centrifugal fan according to claim 1, characterized in that: A liquid spraying pipe (6) is installed at the top of the moving block (403) via a telescopic pipe (601), and the spray head of the liquid spraying pipe (6) is vertically facing downwards; A piston tube (602) is also installed transversely on a side of the liquid storage box (401) away from the annular brush plate (203); A piston rod (603) is installed inside the piston tube (602), and a rod portion of the piston rod (603) extends toward the liquid storage box (401) and is located outside the piston tube (602); The tail of the piston tube (602) is connected to the bottom of the liquid storage box (401) through a one-way liquid inlet valve tube; The tail of the piston tube (602) is also connected to the liquid spraying tube (6) via a one-way liquid outlet valve tube; The movement of the U-shaped plate (5) is used to push the piston rod (603) to move laterally in the piston tube (602).

3. The parallel centrifugal fan according to claim 2, characterized in that: A C-shaped plate (604) is also installed at the end of the piston rod (603), and the C-shaped plate (604) comprises a left contact portion (604a) and a right contact portion (604b), and the bent portion of the U-shaped plate (5) is located between the left contact portion (604a) and the right contact portion (604b).

4. The parallel centrifugal fan according to claim 2, characterized in that: The inlet of the one-way liquid inlet valve pipe is also provided with a filter head.

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