Blower

Abstract

The utility model belongs to the technical field of air blowers, and particularly relates to an air blower which comprises an air blower and a workbench and further comprises a limiting groove, the limiting groove is formed in the workbench, a fixing plate is installed in the limiting groove in an inserted mode, the air blower is fixedly installed on the top of the fixing plate, and two limiting strips are installed in the limiting groove and located at the bottom of the fixing plate in a sliding mode. The upper ends of the two limiting strips extend into the fixing plate, and the upper ends of the two limiting strips are matched with the fixing plate in an inserted mode. The driving assembly is located in the workbench and used for driving the two limiting strips to slide; the fixing frame is fixedly mounted at the air inlet end of the air blower, vibration generated by the air blower cannot affect the fixing effect of the fixing plate, the air blower is easy to mount and dismount, it is guaranteed that particulate matter and dust in air cannot enter the air blower, and the stability of the air blower during use is guaranteed; meanwhile, the filtering effect of the two filter screens cannot be reduced, operation is convenient and fast, and tools are not needed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of air blower, especially relates to air blower. BACKGROUND

[0002] Air blower is a kind of equipment for conveying gas, it increases the kinetic energy and pressure of gas by impeller rotation, makes gas flow, is widely used in ventilation system, industrial production (such as chemical industry, metallurgy), environmental protection and other fields, can provide required airflow for combustion, ventilation, pneumatic conveying and other processes.

[0003] Most air blowers have some shortcomings when in use, such as: air blower will produce vibration when in use, vibration will cause the fixing bolt of air blower and workbench to be loose, the fixing bolt loosens and will cause the whole air blower to vibrate excessively, excessive vibration will cause greater damage to the bearings, impeller and other key components inside the air blower, shortens the service life of these components, and at the same time, dust and particulate impurities from the outside will be sucked into the air blower when the air blower is in use, after dust and particulate impurities enter the air blower, they will flow inside the equipment along with the airflow.When these impurities contact the impeller, volute, bearing and other key components, they will constantly rub them like sandpaper, shortening their service life. In view of this, we propose air blower. SUMMARY

[0004] The utility model discloses a kind of air blowers, to solve the problems raised in the above background.

[0005] Therefore, the utility model provides air blower, including air blower and workbench, further including:

[0006] Limiting groove, the limiting groove is opened in workbench, the limiting groove is inserted and is connected with the installation of fixed plate, the air blower is fixedly installed at the top of fixed plate, two limiting strips are slidably installed in the limiting groove and at the bottom of fixed plate, the upper end of two limiting strips is extended into fixed plate, and the upper end of two limiting strips is inserted and is connected with fixed plate;

[0007] Driving assembly, the driving assembly is located in workbench, and is used to drive two limiting strips to slide;

[0008] Fixed frame, the fixed frame is fixedly installed at the air inlet end of air blower, two filter screens are inserted and are connected with the installation in the fixed frame, power cavity is opened in the fixed frame and between two filter screens, two sliding blocks are slidably installed in the power cavity, two connecting rods are rotatably installed at one end of two sliding blocks, four limiting blocks are rotatably installed at one end of four connecting rods, one end of four limiting blocks extends into two filter screens respectively, and one end of four limiting blocks is inserted and is connected with two filter screens respectively;

[0009] A power assembly is arranged in the fixed frame and used to drive the two sliding blocks to slide.

[0010] In the technical solution, when the air blower needs to be installed, the driving assembly is arranged to drive the two limiting strips to slide downward, then the fixed plate is inserted into the workbench, the driving assembly is arranged to drive the two limiting strips to slide upward, and finally the two limiting strips are inserted into the fixed plate to fix the position of the fixed plate, so that the position of the air blower is fixed, and the vibration of the air blower during use does not affect the fixing effect of the fixed plate, and the air blower is easy to install and disassemble.

[0011] When the air blower is in use, the air outside is first filtered by the two filter screens before entering the air blower, so that the air outside is filtered, and larger particulate matters are retained on the top of the upper filter screen, and smaller dust and particulate matters are retained on the top of the lower filter screen, so that the particulate matters and dust in the air cannot enter the air blower, and the stability of the air blower during use is ensured.

[0012] When the two filter screens need to be taken out for cleaning, the power assembly is arranged to drive the two sliding blocks to slide, the two sliding blocks drive the four connecting rods to rotate respectively, and the four connecting rods drive the four limiting blocks to slide respectively, so that the two filter screens can be taken out for cleaning, and the two filter screens can be installed through the reverse operation, so that the filtering effect of the two filter screens is not reduced, the operation is convenient and fast, and no workers are needed.

[0013] In the above technical solution, further, the driving assembly comprises:

[0014] A sliding plate is slidably installed in the limiting groove and located between the two fixed plates, guide grooves are formed in the two sides of the sliding plate, guide columns are slidably installed in the guide grooves, the two guide columns are fixedly connected with the two fixed plates respectively, a plurality of springs I fixed in the inner wall of the limiting groove are fixedly installed at one end of the sliding plate, a fixed rod is fixedly installed at the other end of the sliding plate, one end of the fixed rod penetrates through the limiting groove and extends to the outside, and the fixed rod is slidably connected with the limiting groove.

[0015] In the technical solution, when the air blower needs to be installed, the fixed rod is first pushed to slide towards the sliding plate, and the springs are compressed and contracted, the sliding plate drives the two guide columns to displace downward through the two guide grooves, the two guide columns drive the two limiting strips to slide downward, then the fixed plate is inserted into the workbench, and then the fixed rod is loosened, under the action of the rebound force of the springs, the sliding plate slides towards the fixed rod, the sliding plate drives the two guide columns to displace upward through the two guide grooves, the two guide columns drive the two limiting strips to slide upward, finally the two limiting strips are inserted into the fixed plate, the position of the fixed plate can be fixed, the position of the fixed plate is fixed, further the position of the air blower is fixed, and when the air blower is used, the vibration of the air blower does not affect the fixing effect of the fixed plate, and the air blower is simple to install and disassemble.

[0016] In the above technical solution, further, the power assembly comprises:

[0017] Two fixed blocks, two The fixed blocks are fixedly installed on one side of the two sliding blocks, a threaded rod is rotatably installed in the power cavity and located on one side of the two fixed blocks, one end of the threaded rod penetrates through the two fixed blocks and the power cavity and extends to the outside, the threaded rod is in threaded connection with the two fixed blocks, and the two fixed blocks are in sliding connection with the power cavity.

[0018] In the technical solution, when the two filter screens need to be taken out for cleaning, the user rotates the operation disc forward to drive the threaded rod to rotate forward, under the action of the thread, the threaded rod drives the two fixed blocks to slide towards the operation disc, the two fixed blocks drive the two sliding blocks to slide, and the two sliding blocks drive the four connecting rods to rotate, the four connecting rods drive the four limiting blocks to slide, and when one end of the four limiting blocks is separated from the two filter screens, the user can take out the two filter screens for cleaning. The two filter screens can be installed through the above reverse operation, the filtering effect of the two filter screens is ensured not to decrease, the operation is convenient and fast, and no tool is needed.

[0019] In the above technical solution, further, the power assembly further comprises:

[0020] An operation disc is fixedly installed at one end of the threaded rod, a plurality of grooves are formed in the operation disc, a sliding groove is formed in the fixed frame and located on one side of the operation disc, a sliding column is slidably installed in the sliding groove, a spring two is fixedly installed at one end of the sliding column and fixed to the inner wall of the sliding groove, the other end of the sliding column penetrates through the sliding groove and extends into the corresponding groove, one end of the sliding column is in plug-in cooperation with the groove, and the other end of the sliding column penetrates through the sliding groove and extends to the outside.

[0021] In the technical solution, first, the sliding column is pulled to slide in the direction of the second spring, and the second springs are pressed and contracted, and when the end of the sliding column is separated from the corresponding groove, the user can rotate the operation disc in the positive direction.

[0022] In the above technical solution, further, the grooves are equally spaced on the operation disc.

[0023] In the technical solution, the operation disc can be rotated to any angle and fixed.

[0024] In the above technical solution, further, the four limiting blocks are in sliding connection with the power cavity.

[0025] In the technical solution, the four limiting blocks can slide in the power cavity.

[0026] In the above technical solution, further, the filtering precision of the upper filter screen is greater than that of the lower filter screen.

[0027] In the technical solution, larger particles will stay on the top of the upper filter screen, and smaller dust and particles will stay on the top of the lower filter screen, ensuring that particles and dust in the air will not enter the air blower.

[0028] The beneficial effects of the utility model are:

[0029] 1. When the air blower needs to be installed, the driving assembly can drive the two limiting strips to slide downward, then the fixed plate is inserted into the workbench, the driving assembly can drive the two limiting strips to slide upward, finally the two limiting strips are inserted into the fixed plate, the position of the fixed plate can be fixed, the position of the fixed plate is fixed, further the position of the air blower is fixed, when the air blower is used, the vibration of the air blower will not affect the fixing effect of the fixed plate, and the air blower is simple to install and disassemble.

[0030] 2. When the air blower is used, the air outside first passes through the two filter screens and enters the air blower, the air outside can be filtered, larger particles will stay on the top of the upper filter screen, and smaller dust and particles will stay on the top of the lower filter screen, ensuring that particles and dust in the air will not enter the air blower, and ensuring the stability of the air blower when used.

[0031] 3. The air blower, when two filter screens need to be taken out for cleaning, through the power assembly arranged, can drive two sliding blocks to slide, two sliding blocks drive four connecting rods to rotate respectively, four connecting rods pull four limiting blocks to slide respectively, when one end of four limiting blocks is separated from two filter screens respectively, the user can take out two filter screens for cleaning, through the reverse operation, two filter screens can be installed, the filtering effect of two filter screens is ensured not to decline, the operation is convenient and fast, and no tool is needed. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the overall structure schematic diagram of the utility model;

[0033] Figure 2 is the fixed frame cross section structure schematic diagram one of the utility model;

[0034] Figure 3 is the fixed frame cross section structure schematic diagram two of the utility model;

[0035] Figure 4 is the Figure 3 structure schematic diagram of enlarged A place in the utility model;

[0036] Figure 5 is the fixed frame cross section structure schematic diagram three of the utility model;

[0037] Figure 6 is the workbench cross section structure schematic diagram one of the utility model;

[0038] Figure 7 is the workbench cross section structure schematic diagram two of the utility model;

[0039] Figure 8 is the fixed plate cross section structure schematic diagram of the utility model;

[0040] Figure 9 is the workbench cross section structure schematic diagram three of the utility model;

[0041] Figure 10 is the local explosion structure schematic diagram of the utility model.

[0042] The mark in the drawing indicates that:

[0043] 1, air blower;2, workbench;3, limiting groove;4, fixed plate;5, limiting strip;6, filter screen;7, power cavity;8, sliding block;9, connecting rod;10, limiting block;11, sliding plate;12, guide groove;13, guide column;14, spring one;15, fixed rod;16, fixed block;17, threaded rod;18, operation disc;19, recess;20, sliding groove;21, sliding column;22, spring two;23, fixed frame. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0045] In the description of the present application, it should be noted that the terms used herein are only intended to describe the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The technology, methods and devices known to those skilled in the related art can not be discussed in detail, but should be considered as part of the authorized description under appropriate circumstances. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so further discussion is not needed for them in the subsequent drawings once an item is defined in one drawing.

[0046] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not intended to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0047] It should be noted that in the description of the present application, the orientation or position relationship indicated by the terms such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without the opposite indication, these orientation terms do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation terms "inner, outer" refer to the inner and outer of the contour of each part itself.

[0048] It should be noted that in this application, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements not only include those elements, but also include other elements that are not expressly listed, or other elements that are inherent in such processes, methods, articles, or apparatuses. Without more limitations, an element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and apparatuses in the embodiments of the application is not limited to the order of performing the functions as shown or discussed, but can also include performing the functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from the described order, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0049] Embodiment 1:

[0050] Please refer to Figure 1 - Figure 10 As shown in the figure, the embodiment provides a blower, which comprises a blower 1 and a workbench 2, and further comprises:

[0051] A limiting groove 3 is formed in the workbench 2, a fixing plate 4 is inserted and mounted in the limiting groove 3, the blower 1 is fixedly mounted on the top of the fixing plate 4, two limiting strips 5 are slidingly mounted in the limiting groove 3 and located at the bottom of the fixing plate 4, the upper ends of the two limiting strips 5 extend into the fixing plate 4, and the upper ends of the two limiting strips 5 are inserted and matched with the fixing plate 4;

[0052] A driving assembly is located in the workbench 2 and is used to drive the two limiting strips 5 to slide;

[0053] A fixed frame 23 is fixedly mounted at the air inlet end of the blower 1, two filter screens 6 are inserted and mounted in the fixed frame 23, a power cavity 7 is formed in the fixed frame 23 and located between the two filter screens 6, two sliding blocks 8 are slidingly mounted in the power cavity 7, two connecting rods 9 are rotatably mounted at one end of each of the two sliding blocks 8, four limiting blocks 10 are rotatably mounted at one end of each of the four connecting rods 9, one end of each of the four limiting blocks 10 extends into the two filter screens 6, and one end of each of the four limiting blocks 10 is inserted and matched with the two filter screens 6;

[0054] A power assembly is located in the fixed frame 23 and is used to drive the two sliding blocks 8 to slide.

[0055] When the air blower 1 needs to be installed, the driving assembly is arranged to drive the two limiting strips 5 to slide downward, then the fixed plate 4 is inserted into the workbench 2, the driving assembly is arranged to drive the two limiting strips 5 to slide upward, finally the two limiting strips 5 are inserted into the fixed plate 4, the position of the fixed plate 4 is fixed, the position of the air blower 1 is further fixed, and the vibration of the air blower 1 during use does not affect the fixing effect of the fixed plate 4, and the air blower 1 is simple to install and disassemble.

[0056] When the air blower 1 is in use, the air outside is filtered by the two filter screens 6 before entering the air blower 1, the air outside is filtered, larger particles are retained on the top of the upper filter screen 6, and smaller dust and particles are retained on the top of the lower filter screen 6, so that the particles and dust in the air cannot enter the air blower 1, and the stability of the air blower 1 during use is ensured.

[0057] When the two filter screens 6 need to be taken out for cleaning, the power assembly is arranged to drive the two sliding blocks 8 to slide, the two sliding blocks 8 drive the four connecting rods 9 to rotate respectively, and the four connecting rods 9 drive the four limiting blocks 10 to slide respectively, when one end of the four limiting blocks 10 is separated from the two filter screens 6 respectively, the user can take out the two filter screens 6 for cleaning, and the two filter screens 6 can be installed through the above reverse operation, the filtering effect of the two filter screens 6 is ensured not to decrease, the operation is convenient and fast, and no tool is needed.

[0058] In this embodiment, the driving assembly comprises:

[0059] The sliding plate 11 is slidably installed in the limiting groove 3 and located between the two fixed plates 4, the two sides of the sliding plate 11 are provided with guide grooves 12, the guide grooves 12 are slidably installed with guide columns 13, the two guide columns 13 are fixedly connected with the two fixed plates 4 respectively, one end of the sliding plate 11 is fixedly installed with a plurality of spring I 14 fixed in the inner wall of the limiting groove 3, the other end of the sliding plate 11 is fixedly installed with a fixed rod 15, one end of the fixed rod 15 penetrates through the limiting groove 3 and extends to the outside, and the fixed rod 15 is slidably connected with the limiting groove 3;

[0060] When the air blower 1 needs to be installed, first push the fixed rod 15 to slide towards the sliding plate 11, and the plurality of springs 14 are pressed and contracted, the sliding plate 11 drives the two guide columns 13 to displace downward through the two guide grooves 12 respectively, the two guide columns 13 drive the two limiting strips 5 to slide downward respectively, then insert the fixed plate 4 into the workbench 2, then release the fixed rod 15, under the action of the rebound force of the plurality of springs 14, the sliding plate 11 slides towards the fixed rod 15, the sliding plate 11 drives the two guide columns 13 to displace upward through the two guide grooves 12 respectively, the two guide columns 13 drive the two limiting strips 5 to slide upward respectively, finally the two limiting strips 5 are inserted into the fixed plate 4, the position of the fixed plate 4 can be fixed, the position of the fixed plate 4 is fixed, further the position of the air blower 1 is fixed, and when the air blower 1 is used, the vibration of the air blower 1 will not affect the fixing effect of the fixed plate 4, and the air blower 1 is simple in installation and dismounting.

[0061] In the embodiment, the power assembly comprises:

[0062] Two fixed blocks 16 are fixedly installed at one side of the two sliding blocks 8 in the power cavity 7, a threaded rod 17 is rotatably installed at one side of the two fixed blocks 16 in the power cavity 7, one end of the threaded rod 17 penetrates through the two fixed blocks 16 and the power cavity 7 and extends to the outside, the threaded rod 17 is in threaded connection with the two fixed blocks 16, and the two fixed blocks 16 are in sliding connection with the power cavity 7;

[0063] When the two filter screens 6 need to be taken out for cleaning, an operator rotates the operation disc 18 in a forward direction and drives the threaded rod 17 to rotate in a forward direction, under the action of the screw, the threaded rod 17 drives the two fixed blocks 16 to slide towards the operation disc 18, the two fixed blocks 16 drive the two sliding blocks 8 to slide respectively, the two sliding blocks 8 drive the four connecting rods 9 to rotate respectively, the four connecting rods 9 drive the four limiting blocks 10 to slide respectively, and when one end of the four limiting blocks 10 is separated from the two filter screens 6 respectively, the operator can take out the two filter screens 6 for cleaning, the two filter screens 6 can also be installed through reverse operation, the filtering effect of the two filter screens 6 is ensured not to decrease, and the operation is convenient and fast and does not need tools.

[0064] In the embodiment, the power assembly further comprises:

[0065] The operation disc 18 is fixedly installed at one end of the threaded rod 17, a plurality of grooves 19 are formed in the operation disc 18, a sliding groove 20 is formed in the fixed frame 23 and located at one side of the operation disc 18, a sliding column 21 is slidably installed in the sliding groove 20, a spring 22 is fixedly installed at one end of the sliding column 21 and fixed to the inner wall of the sliding groove 20, the other end of the sliding column 21 penetrates through the sliding groove 20 and extends into the corresponding groove 19, one end of the sliding column 21 is inserted and matched with the groove 19, and one side of the sliding column 21 penetrates through the sliding groove 20 and extends to the outside;

[0066] Firstly, the sliding column 21 is pulled to slide towards the spring 22, and a plurality of springs 22 are extruded and contracted, and when one end of the sliding column 21 is separated from the corresponding groove 19, the user can rotate the operation disc 18 in the forward direction.

[0067] Embodiment 2:

[0068] The embodiment provides an air blower, which comprises the technical solutions of the above-mentioned embodiments and has the following technical features.

[0069] In the embodiment, the plurality of grooves 19 are annularly and equidistantly distributed on the operation disc 18.

[0070] The operation disc 18 can be rotated to any angle and fixed.

[0071] Embodiment 3:

[0072] The embodiment provides an air blower, which comprises the technical solutions of the above-mentioned embodiments and has the following technical features.

[0073] In the embodiment, the four limiting blocks 10 are all in sliding connection with the power cavity 7.

[0074] The four limiting blocks 10 can all slide in the power cavity 7.

[0075] Embodiment 4:

[0076] The embodiment provides an air blower, which comprises the technical solutions of the above-mentioned embodiments and has the following technical features.

[0077] In the embodiment, the filtering precision of the upper filter screen 6 is greater than that of the lower filter screen 6.

[0078] The larger particulate matters stay on the top of the upper filter screen 6, and the smaller dust and particulate matters stay on the top of the lower filter screen 6, so that the particulate matters and dust in the air cannot enter the air blower 1.

[0079] Working principle: when the blower 1 needs to be installed, first push the fixed rod 15 to the direction of the sliding plate 11, and the springs 14 are extruded and contracted, the sliding plate 11 drives the two guide columns 13 to displace downward through the two guide grooves 12, the two guide columns 13 drive the two limiting strips 5 to slide downward, then insert the fixed plate 4 into the workbench 2, then loosen the fixed rod 15, under the action of the rebound force of the springs 14, the sliding plate 11 slides to the direction of the fixed rod 15, the sliding plate 11 drives the two guide columns 13 to displace upward through the two guide grooves 12, the two guide columns 13 drive the two limiting strips 5 to slide upward, finally the two limiting strips 5 are inserted into the fixed plate 4, the position of the fixed plate 4 can be fixed, the position of the fixed plate 4 is fixed, further the position of the blower 1 is fixed, when the blower 1 is used, the vibration of the blower 1 will not affect the fixing effect of the fixed plate 4, and the installation and dismounting of the blower 1 is simple;

[0080] When the blower 1 is used, the air outside first passes through the filtering of the two filter screens 6 and enters the blower 1, which can filter the air outside, larger particulate matters will stay on the top of the upper filter screen 6, and smaller dust and particulate matters will stay on the top of the lower filter screen 6, which can ensure that the particulate matters and dust in the air will not enter the blower 1, and ensure the stability of the blower 1 when used;

[0081] When the two filter screens 6 need to be taken out for cleaning, first pull the sliding column 21 to slide to the direction of the springs 22, at the same time, the springs 22 are extruded and contracted, when the one end of the sliding column 21 is separated from the corresponding groove 19, the user can rotate the operation disc 18 forward and drive the threaded rod 17 to rotate forward, under the action of the thread, the threaded rod 17 drives the two fixed blocks 16 to slide to the direction of the operation disc 18, the two fixed blocks 16 drive the two sliding blocks 8 to slide, the two sliding blocks 8 drive the four connecting rods 9 to rotate, the four connecting rods 9 pull the four limiting blocks 10 to slide, when the one end of the four limiting blocks 10 is separated from the two filter screens 6 respectively, the user can take out the two filter screens 6 for cleaning, the two filter screens 6 can be installed through the above reverse operation, which can ensure that the filtering effect of the two filter screens 6 will not decrease, the operation is convenient and fast, and no tools are needed.

[0082] The embodiments of the application are described above in combination with the drawings, the embodiments and the features in the embodiments in the application can be combined with each other without conflict, the application is not limited to the above specific embodiments, the above specific embodiments are only illustrative but not limited, the ordinary skilled in the art can make many forms under the inspiration of the application without departing from the purpose of the application and the scope protected by the claims, which all belong to the protection of the application.

Claims

1. A blower comprising a blower (1) and a workbench (2), characterized in that, Also includes: The limiting groove (3) is opened in the work table (2), the limiting groove (3) is inserted and installed with the fixed plate (4), the air blower (1) is fixedly installed on the top of the fixed plate (4), two limiting strips (5) are slidingly installed in the limiting groove (3) and at the bottom of the fixed plate (4), the upper ends of the two limiting strips (5) extend into the fixed plate (4), and the upper ends of the two limiting strips (5) are inserted and matched with the fixed plate (4); The driving assembly is located in the work table (2), and is used for driving the two limiting strips (5) to slide; The fixed frame (23) is fixedly installed at the air inlet end of the air blower (1), two filter screens (6) are inserted and installed in the fixed frame (23), a power cavity (7) is opened in the fixed frame (23) and between the two filter screens (6), two sliding blocks (8) are slidingly installed in the power cavity (7), two connecting rods (9) are rotatably installed at one end of the two sliding blocks (8), four limiting blocks (10) are rotatably installed at one end of the four connecting rods (9), one end of the four limiting blocks (10) extends into the two filter screens (6) respectively, and one end of the four limiting blocks (10) is inserted and matched with the two filter screens (6) respectively; The power assembly is located in the fixed frame (23), and is used for driving the two sliding blocks (8) to slide.

2. The air blower of claim 1, wherein The driving assembly comprises: The sliding plate (11) is slidingly installed in the limiting groove (3) and between the two fixed plates (4), guide grooves (12) are opened at both sides of the sliding plate (11), guide columns (13) are slidingly installed in the guide grooves (12), the two guide columns (13) are fixedly connected with the two fixed plates (4) respectively, one end of the sliding plate (11) is fixedly installed with a plurality of spring one (14) fixed in the inner wall of the limiting groove (3), the other end of the sliding plate (11) is fixedly installed with a fixed rod (15), one end of the fixed rod (15) penetrates through the limiting groove (3) and extends to the outside, and the fixed rod (15) is slidingly connected with the limiting groove (3).

3. The air blower of claim 2, wherein The power assembly comprises: Two fixed blocks (16) are fixedly installed at one side of the two sliding blocks (8), a threaded rod (17) is rotatably installed in the power cavity (7) and at one side of the fixed block (16), one end of the threaded rod (17) penetrates through the two fixed blocks (16) and extends to the outside of the power cavity (7), the threaded rod (17) is threadedly connected with the two fixed blocks (16), and the two fixed blocks (16) are slidingly connected with the power cavity (7).

4. The air blower of claim 3, wherein The power assembly further comprises: An operation disc (18) is fixedly installed at one end of the threaded rod (17), a plurality of recesses (19) are formed in the operation disc (18), a sliding groove (20) is formed in the fixed frame (23) and located at one side of the operation disc (18), a sliding column (21) is slidably installed in the sliding groove (20), one end of the sliding column (21) is fixedly installed with a second spring (22) fixed to the inner wall of the sliding groove (20), the other end of the sliding column (21) penetrates through the sliding groove (20) and extends into the corresponding recess (19), one end of the sliding column (21) is insertedly connected with the recess (19), and one side of the sliding column (21) penetrates through the sliding groove (20) and extends to the outside.

5. The air blower of claim 4, wherein The plurality of recesses (19) are annularly and equidistantly distributed on the operation disc (18).

6. The air blower of claim 1, wherein The four limiting blocks (10) are all in sliding connection with the power cavity (7).

7. The air blower of claim 1, wherein The filtering precision of the upper filter screen (6) is greater than that of the lower filter screen (6).

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