Quick-release low-noise dustproof axial flow fan structure with adjustable wind direction

Abstract

The invention provides a quick-release low-noise dustproof axial flow fan structure with an adjustable wind direction. The quick-release low-noise dustproof axial flow fan structure comprises a fan body, the fan body is of a cylindrical structure, an outlet adjusting assembly is fixed to the rear end of the fan body, a motor and a silencing cone are installed in the fan body, the silencing cone is fixed to the rear end of the motor, an impeller is sleeved with a motor shaft of the motor, a hasp assembly is arranged on the outer edge of the front end of the fan body, and the front end of the fan body is connected with an inlet silencer through the fan body. A hasp assembly is arranged on the outer edge of the rear end of the inlet silencer. According to the fan, the design of low noise, a dustproof structure, adjustable wind direction and wind quantity, individuation, modularization, convenient later maintenance and the like of the fan are integrated, and the requirement for low noise in a special environment is met, and meanwhile, the air inlet silencer and the fan body are designed to be of a tool-free quick-release structure; and the problems of difficult disassembly in a special environment and large economic loss caused by scrapping of the whole machine are solved.

Description

Technical Field

[0001] The invention relates to a quick-detachable low-noise and dust-proof axial flow fan structure with adjustable wind direction, belonging to the technical field of general fluid machinery. Background Art

[0002] As a conventional ventilation and heat dissipation equipment, axial flow fans are widely used in industry, agriculture, civil, military, aviation and aerospace. They can adapt to various complex places and environments and have the characteristics of low pressure and large flow.

[0003] Axial flow fans usually need to work continuously in complex environments. After long-term operation, the dust accumulated inside affects the normal operation of the fan. Conventional installation methods are difficult to disassemble and assemble, which is not conducive to cleaning the internal dust and replacing parts. Small axial flow fans usually use motor direct drive. The motor of this type of product is inside the fan. Long-term operation can easily cause dust to accumulate at the front end of the motor and enter the motor bearing, causing lubrication failure, making the fan noise gradually increase until it fails. It is difficult to repair and replace the motor or bearing of a small fan, which directly and seriously affects the life of the fan. Therefore, conventional small axial flow fans are difficult to meet the requirements of rapid disassembly and dust prevention under special working conditions.

[0004] Axial flow fans are noisier than centrifugal fans and mixed flow fans. In some applications, the demand for large flow, low pressure head and low noise is very strong. The long-term high noise of conventional fans is often difficult to overcome, so it is necessary to take further measures or add noise reduction modules on the basis of optimizing the main body noise. Therefore, the low-noise and modular quick-detachable fan of the present invention can meet the needs of low noise and noise differentiation.

[0005] In some special-purpose axial flow fans, there are requirements for the air volume and direction of the fan's air output, but there is no clear requirement for accuracy. The usual method is to add an air volume adjustment mechanism inside the fan, which complicates the fan structure, reduces product reliability, and increases the difficulty of subsequent maintenance.

[0006] Conventional axial flow fans have problems such as high operating noise, difficulty in cleaning accumulated dust after long-term operation, difficulty in later disassembly and maintenance, complex adjustment of air volume and direction, and complex dust prevention measures. They cannot meet the needs of low noise and noise differentiation, quick disassembly and assembly, and adjustment of air volume and direction under special working conditions. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a quick-detachable, low-noise, dust-proof axial flow fan structure with adjustable wind direction. The quick-detachable, low-noise, dust-proof axial flow fan structure with adjustable wind direction can be quickly installed and disassembled by hand, and can achieve the selection of low noise requirements and noise differences. It has the advantages of modularity, low noise, easy maintenance and simple structure.

[0008] The present invention is achieved through the following technical solutions.

[0009] The present invention provides a quick-detachable, low-noise, dust-proof axial flow fan structure with adjustable wind direction, comprising a fan body; the fan body is a cylindrical structure, an outlet adjustment assembly is fixed at the rear end of the fan body, a motor and a silencer cone are installed in the fan body, the silencer cone is fixed at the rear end of the motor, an impeller is mounted on the motor shaft of the motor, a buckle assembly is arranged on the front end outer edge of the fan body, the front end of the fan body is connected to an inlet muffler through the fan body, and a buckle assembly is arranged on the front end outer edge of the inlet muffler.

[0010] The impeller is fixed by a nut and a retaining ring at the end of the motor shaft.

[0011] The screw rod assembly is installed on the side of the fan body and the inlet muffler near the front end.

[0012] The screw assembly consists of a screw, a screw sleeve is fixedly mounted on the screw near the outer end, the inner end of the screw is fixed to the fan body or the imported muffler through a butterfly sleeve, the middle section of the screw sleeve is mounted with a spring, and the outer end of the spring is fixed to a gasket.

[0013] The outlet regulating assembly is composed of an outlet pipe, a shutter assembly with rotatable blades is installed at the middle through cavity position, the end of the outlet pipe is connected and fixed to the fan body through a rotating buckle, and an O-ring is arranged on the outer sleeve of the rotating buckle position.

[0014] The shutter assembly is composed of a first shutter board, a second shutter board, and a third shutter board installed on a connecting plate in sequence from the center line to both sides. The first shutter board, the second shutter board, and the third shutter board are all installed parallel to the rotating shaft, and the rotating shaft is synchronously driven by the connecting plate.

[0015] The rotating buckle is composed of a buckle arranged on a semi-cylindrical groove.

[0016] A dustproof structure is installed and fixed on the casing at a position between the motor and the impeller; the dustproof structure is composed of a second retaining ring and a first retaining ring overlapped in double layers and fixed between the impeller and the bearing, forming a multi-layer maze structure with the baffle fixed to the casing, and the motor shaft of the motor passes through the second retaining ring and the first retaining ring; the silencer cone is coaxially connected and fixed to the casing, an outer shell is fixed on the outer layer of the casing, and a cavity is provided between the casing and the outer shell and filled with sound-absorbing material.

[0017] The buckle assembly consists of a buckle ring rotatably connected to a buckle, and the buckle ring is installed and fixed at a required installation position and / or an imported muffler through a rubber sleeve; the buckle ring is connected to the buckle through a buckle ring hole, and a buckle pin hole parallel to the buckle ring hole is provided on the buckle for pin limiting, a limiting groove is provided on the inner surface of the buckle to prevent the buckle from rotating, and a butterfly sleeve hole is provided at the position of the limiting groove.

[0018] The imported silencer is composed of a silencer casing, the rear edge of which is provided with a hook-shaped structure for cooperating with a buckle assembly; a silencer shell is disposed outside the silencer casing, and a cavity filled with sound-absorbing material is disposed between the silencer casing and the silencer shell; a silencer tube is coaxially fixed to the center position of the inner tube of the silencer casing, and the silencer tube is filled with sound-absorbing material; a silencer ring is connected and installed on the outer side of the front end of the silencer tube, and a silencer baffle is fixed to the silencer ring and the front end of the silencer tube.

[0019] The beneficial effects of the present invention are: it integrates the fan's low noise, dust-proof structure, adjustable wind direction and air volume, personalization, modularization and convenient later maintenance designs into one, which solves the requirement of low noise in special environments, and at the same time designs the air inlet muffler and the fan body as a tool-free quick-disassembly structure, which solves the problem of difficult disassembly in special environments and the problem of large economic losses caused by scrapping the entire machine; it has the characteristics of simple structure, good dust-proof effect, convenient maintenance, convenient adjustment of wind volume and direction and low noise, and can be widely used in aerospace and engineering fields of various complex places and environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the structure of at least one embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle outlet regulating component;

[0022] Figure 3 yes Figure 2 A front view of

[0023] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle louver board;

[0024] Figure 5 yes Figure 4 Structural diagram of the connecting plate at the midline;

[0025] Figure 6 yes Figure 2 A schematic diagram of the structure of the middle rotating buckle;

[0026] Figure 7 yes Figure 2 Schematic diagram of the structure of the middle outlet pipe;

[0027] Figure 8 yes Figure 2 Schematic diagram of comparison of various working states;

[0028] Fig. 9 yes Figure 1 Schematic diagram of the structure of the blower body;

[0029] Fig.10 yes Fig. 9 Schematic diagram of the structure of the impeller installation shaft;

[0030] Fig.11 yes Fig. 9 Schematic diagram of the installation structure of the motor;

[0031] Fig.12 yes Figure 1 The structural diagram of the middle screw assembly;

[0032] Fig.13 yes Fig.12 A top view of

[0033] Fig.14 yes Figure 1 A schematic diagram of the structure of the middle buckle assembly;

[0034] Fig.15 yes Fig.14 A front view of

[0035] Fig.16 yes Fig.14 A schematic diagram of the structure of the middle buckle;

[0036] Fig.17 yes Figure 1 Schematic diagram of the structure of the middle inlet muffler;

[0037] Fig.18 yes Figure 1 An enlarged schematic diagram of the interface between the blower body and the inlet muffler;

[0038] Fig.19 yes Fig.18 Top view of the .

[0039] In the figure: 1- outlet adjustment assembly, 2- O-ring, 3- fan body, 4- screw assembly, 5- buckle assembly, 6- inlet muffler, 11- shutter assembly, 12- outlet pipe, 13- rotating buckle, 111- third shutter plate, 112- second shutter plate, 113- first shutter plate, 114- connecting plate, 131- buckle, 132- semi-cylindrical groove, 31- casing, 32- muffler cone, 33- casing, 34- motor, 35- impeller, 36- dustproof structure, 37 - nut, 38- retaining ring, 39- sound absorbing material, 361- second retaining ring, 362- first retaining ring, 363- baffle, 41- screw sleeve, 42- washer, 43- spring, 44- screw, 45- butterfly sleeve, 51- buckle, 52- buckle ring, 53- rubber sleeve, 511- butterfly sleeve hole, 512- limiting groove, 513- buckle ring hole, 514- buckle pin hole, 61- silencer, 62- silencer casing, 63- silencer shell, 64- silencer ring, 65- silencer baffle. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0041] Example 1

[0042] like Figures 1 to 19 The shown structure is a quick-detachable, low-noise, dust-proof axial flow fan structure with adjustable wind direction, comprising a fan body 3; the fan body 3 is a cylindrical structure, an outlet adjustment component 1 is fixed to the rear end of the fan body 3, a silencer cone 32 is installed in the fan body 3, a motor 34 is fixed at the front end position in the silencer cone 32, an impeller 35 is mounted on the motor shaft of the motor 34, a buckle component 5 is arranged on the front end outer edge of the fan body 3, the front end of the fan body 3 is connected to the inlet muffler 6 through the fan body 3, and a buckle component 5 is arranged on the front end outer edge of the inlet muffler 6.

[0043] Example 2

[0044] Based on Embodiment 1, the impeller 35 is fixed on the motor shaft through a nut 37 and a retaining ring 38 at the end of the motor shaft.

[0045] Furthermore, three screw assemblies 4 are evenly distributed on the circumference of the side surface of the fan body 3 and the inlet muffler 6 near the front end.

[0046] Furthermore, the screw assembly 4 is composed of a screw 44, on which a screw sleeve 41 is fixed near the outer end, the inner end of the screw 44 is fixed to the fan body 3 or the inlet muffler 6 through a butterfly sleeve 45, and a spring 43 is mounted in the middle section of the screw sleeve 41, and the outer end of the spring 43 is fixed to the gasket 42.

[0047] Example 3

[0048] Based on Example 1, the outlet adjustment assembly 1 is composed of an outlet pipe 12, a shutter assembly 11 with rotatable blades is installed at the middle cavity position, the end of the outlet pipe 12 is connected to and fixed to the fan body 3 through a rotating buckle 13, and an O-ring 2 is arranged on the outer sleeve of the rotating buckle 13.

[0049] Furthermore, the shutter assembly 11 is composed of a first shutter board 113, a second shutter board 112, and a third shutter board 111 installed on a connecting plate 114 from the center line to both sides in sequence. The first shutter board 113, the second shutter board 112, and the third shutter board 111 are all installed parallel to the rotating shaft, and the rotating shaft is synchronously driven by the connecting plate 114.

[0050] Furthermore, the rotating buckle 13 is composed of a buckle 131 arranged on a semi-cylindrical groove 132 .

[0051] Example 4

[0052] Based on Example 1, a dustproof structure 36 is installed and fixed to the casing 31 at a position between the motor 34 and the impeller 35; the dustproof structure 36 is composed of a second retaining ring 361 and a first retaining ring 362, which are overlapped and fixed between the impeller 35 and the bearing of the motor 34, and form a multi-layer maze structure with the baffle 363 fixed to the casing 31, and the motor shaft of the motor 34 passes through the second retaining ring 361 and the first retaining ring 362; the silencer cone 32 is coaxially connected and fixed to the casing 31, and the outer layer of the casing 31 is fixed with an outer shell 33, and there is a cavity between the casing 31 and the outer shell 33 and filled with sound-absorbing material 39.

[0053] Furthermore, the buckle assembly 5 is composed of a buckle ring 52 rotatably connected to a buckle 51, and the buckle ring 52 is installed and fixed at the required installation position and / or the imported muffler 6 through a rubber sleeve 53; the buckle ring 52 is connected to the buckle 51 through a buckle ring hole 513, and the buckle 51 is also provided with a buckle pin hole 514 parallel to the buckle ring hole 513 for pin limiting, and a limiting groove 512 is provided on the inner surface of the buckle 51 to prevent the buckle from rotating, and a butterfly sleeve hole 511 is provided at the position of the limiting groove 512.

[0054] Furthermore, the imported silencer 6 is composed of a silencer casing 62, and the rear end edge of the silencer casing 62 has a hook-shaped structure for cooperating with the buckle assembly 5; the silencer casing 62 is covered with a silencer shell 63, and there is a cavity filled with sound-absorbing material 39 between the silencer casing 62 and the silencer shell 63; a silencer tube 61 is coaxially fixed at the center position of the inner tube of the silencer casing 62, and the silencer tube 61 is filled with sound-absorbing material 39; a silencer ring 64 is connected to the outer side of the front end of the silencer tube 61, and a silencer baffle 65 is fixed to the silencer ring 64 and the front end of the silencer tube 61.

[0055] Therefore, the present invention can realize fast installation and disassembly by hand; a sealed dustproof maze structure is designed between the impeller and the motor to prevent dust from entering the inside of the bearing without contact, thereby realizing a long life of the fan; noise reduction measures are taken on the fan body and a quick-detachable muffler is arranged at the front end to realize the selection of low noise requirements and noise difference; a shutter structure + a rotating structure is designed at the tail end of the fan to realize a quick adjustment mechanism of the fan's air volume and direction, thereby realizing rapid adjustment and simplicity of structure; the functions of convenient disassembly and maintenance, low noise, convenient and quick adjustment of wind direction and air volume, and modular combination are realized.

[0056] Example 5

[0057] Based on the above embodiment, it is composed of an outlet adjustment component 1, an O-ring 2, a fan body 3, a screw assembly 4, a buckle assembly 5, and an air inlet muffler 6.

[0058] The outlet adjustment component 1 and the fan casing mounting surface are designed with 6 bevel snap-on structures. The installation can be completed by axially pushing the outlet adjustment component 1 into the rear end of the fan body 3 casing, and the installation is very convenient. In order to realize the outlet adjustment component 1 to adjust the wind direction arbitrarily, a groove is designed on the rear end surface of the fan body 3 casing for installing the O-ring 2. When the outlet adjustment component 1 is installed, the O-ring 2 is in a certain compression state between the outlet adjustment component 1 and the fan body 3, which can ensure that the outlet adjustment component 1 will not rotate arbitrarily when the fan is working normally. When the wind direction needs to be adjusted, the wind direction adjustment can be achieved by applying axial force to the outlet adjustment component 1 and rotating it.

[0059] The inlet installation interface of the fan body 3 and the inlet installation interface of the inlet silencer 6 are exactly the same, and the quick locking mechanism composed of the screw assembly 4 and the buckle assembly 5 realizes the tool-free quick disassembly and assembly function of the fan body 3 and the inlet silencer 6, which meets the convenient maintenance requirements of the fan and can also avoid the situation where conventional products need to be dismantled and scrapped. The fan body 3 or the silencer 6 can be selectively replaced according to actual conditions to reduce costs. At the same time, the consistency of the inlet of the fan body 3 and the inlet of the silencer 6 realizes the modularization of the fan, and the air inlet silencer 6 can be selected to be installed according to actual noise requirements to meet personalized needs.

[0060] The outlet adjustment component 1 is composed of a shutter component 11, an outlet pipe 12 and a rotating buckle 13. The five shutter support rods in the shutter component 11 are inserted into the cylindrical hole formed by the joint surface of the outlet pipe 12 and the rotating buckle 13, and then the outlet pipe 12 and the rotating buckle 13 are fastened together with screws to form the outlet adjustment component 1, which can limit the five degrees of freedom of the shutter component 11, ensuring that the shutter component 11 can only rotate along the support rod in the middle of each shutter plate, so as to achieve the adjustment of wind direction and air volume. The shutter component 11 is composed of 1 The louver plate 113 is composed of a first louver plate 113, two second louver plates 112, two third louver plates 111 and a connecting plate 114. A raised support rod is designed in the middle of the louver plate, which can be rotated along the central support rod by inserting it into the circular hole formed by the joint surface of the outlet pipe 12 and the rotating buckle 13; each louver plate has the same width, and is designed with a notch groove and ribs on one side, which is embedded in the U-shaped groove on the connecting plate 114, and then the louver plate is fixed to the U-shaped mouth with screws to ensure that the louver plate support rod can rotate in the louver U-shaped groove. The connecting plate 114 is designed with 5 raised U-shaped notches with equal spacing for installing louvers; at the same time, a manually adjustable handrail is designed. After the louver assembly 11 is installed on the outlet adjustment assembly 1, the handrail of the connecting plate 114 is manually pulled left and right to realize that all louvers rotate with their respective support rods, and all louvers are in a parallel state during the rotation process. By manually pulling the connecting plate 114, the louver can be adjusted to any position within the cross-sectional range of the air outlet pipe 12 (0~180°) in terms of wind direction and opening. By adjusting the coordination between the louver support rod and the cylindrical hole formed by the outlet pipe 12 and the rotating buckle 13, it can be ensured that the louver assembly 11 will not swing with the wind after being adjusted to the required position.

[0061] The rotating buckle 13 for adjusting the wind direction in the outlet adjustment component 1 is designed with 6 buckles 131 evenly distributed on the circumference. The front end of the buckle 131 is designed with a conical surface according to the characteristics of the material. When installed, the buckle 131 is deformed outward by axial thrust and inserted into the circular flange at the outlet end of the fan body 3. The compression amount of the O-ring 2 is controlled by design, so that the circumferential direction adjustment and mechanical limit functions of the outlet adjustment component 1 can be achieved; at the same time, a semi-cylindrical hole is designed on the other side of the rotating buckle 13, which forms a cylindrical hole with the corresponding semi-cylindrical hole on the air outlet pipe 12, which is used to install the support rod of the louver plate, limit the freedom of the louver plate, and achieve the function of adjusting the wind direction and air volume. The outlet adjustment component 1 adjusts the 4 states of the louver component 11 as follows Figure 8 As shown, the rotating buckle 13 of the outlet adjustment assembly 1 can be rotated in a circular direction while adjusting the shutter assembly 11 to achieve adjustment of angles in all directions.

[0062] The fan body 3 is composed of a casing 31, a silencer cone 32, an outer shell 33, a motor 34, an impeller 35, a dustproof structure 36, a nut 37, a retaining ring 38 and a sound-absorbing material 39. The inner surface of the casing 31 is evenly distributed in a triangular shape with small holes of a certain perforation rate. The aperture and perforation rate of the small holes are designed according to the specific noise reduction requirements. The area surrounded by the casing 31 and the outer shell is filled with a silencer material 39 to form a resistive silencer cavity to reduce the fan noise. The design of the size of the sound absorption cavity and the selection of the sound absorption material are mainly related to the noise of a certain frequency required. A silencer cone 32 is installed inside the fan body 3. The designed conical silencer cone 32 can optimize the airflow and reduce the noise generated by turbulence. At the same time, the surface is covered with small holes with a certain perforation rate, and the interior is filled with sound-absorbing material 39 for noise reduction. At the same time, the casing 31 and the silencer cone 32 form a tapered channel to ensure that the silencer structure has the least impact on the airflow. The gradual surface of the casing 31 is used to absorb noise and reflect noise to the silencer cone 32 and the inner wall of the silencer shell 31, thereby minimizing the outlet noise as much as possible. Fig.10 As shown, the retaining ring 38 is designed to be stepped. During installation, the axial force applied by the double nut is transmitted to the impeller 35 and the end face of the motor rotor through the retaining ring at the same time, avoiding the problem that the conventional fan only acts on the impeller 35 and is ultimately transmitted to the motor bearing, causing excessive bearing load and short noise life. The nut 37 of the fan body 3 that locks the impeller 35 uses a double nut in the opposite direction of the fan rotation, which can prevent the fan from loosening during operation.

[0063] The dustproof structure 36 of the fan is composed of a first retaining ring 362, a second retaining ring 361 and a baffle 363. During assembly, the first retaining ring 362 is first pushed into the shaft of the motor 34 to make it close to the bearing, and then the baffle 363 is fixed to the end face of the bearing cover of the motor 34 with screws; then the second retaining ring 361, the impeller 35 and the remaining parts are installed on the shaft of the motor 34. After the installation of the first retaining ring 362, the second retaining ring 361 and the baffle 363, multiple mazes and dust storage grooves are formed between the fan impeller 35 and the motor 34, which can block most of the dust that enters the motor during the long-term operation of the fan, avoiding the situation where the bearing life is affected by the entry of dust or the problem of short life of the traditional O-ring dynamic seal, and achieving the long life requirement of the fan.

[0064] The screw assembly 4 is composed of a screw sleeve 41, a washer 42, a spring 43, a screw 44 and a butterfly sleeve 45. One end of the screw 45 is a threaded structure for installation on the fan housing 31 or the muffler housing 62; the other end is used to install the spring 43, the washer 42, the butterfly sleeve 45 and other parts, and finally the screw sleeve 41 is fixed to the screw 44 with a pin to form an assembly. After installation, the spring 43 is in a compressed state, and the washer 42 and the butterfly sleeve 45 are compressed upward. Before the buckle assembly 5 is installed, the parts on the screw 44 will not shake and cause damage and abnormal noise; after the buckle assembly 5 is installed, the butterfly sleeve 45 can be rotated to complete the locking of the assembly, and the buckle assembly 5 can be kept in a compressed state at all times to prevent vibration during the operation of the product or shaking during the mechanical test and the state of being unable to lock. The butterfly sleeve 45 is designed in a butterfly shape, which can be conveniently operated when installing the buckle assembly 5.

[0065] The buckle assembly 5 is composed of a buckle 51, a buckle ring 52 and a rubber sleeve 53; the buckle structure has a butterfly sleeve hole 511, which is designed for the buckle assembly 5 to be smoothly installed in the screw sleeve assembly 4; at the same time, a limiting groove 512 is designed on the buckle, and when the buckle assembly is installed in the screw sleeve assembly 4, the butterfly sleeve 44 is rotated 90°, and the buckle assembly can be installed in the screw assembly 4 and prevented from loosening by cooperating with the spring 43 of the screw assembly 4. The buckle ring hole 513 is used to install the buckle ring 52 to ensure that the buckle ring 52 can rotate normally and limit movement in other directions; the buckle pin hole 514 is used to install the buckle assembly 5 in the fan housing 31 or the imported muffler housing 62 to ensure normal rotation and limit movement in other directions.

[0066] After the buckle ring 52 in the buckle assembly 5 is designed into a certain shape, on the one hand, it is inserted into the buckle ring hole 513 to form an assembly, and on the other hand, the rubber sleeve 53 is installed on the buckle ring 52. When the buckle ring 52 with the rubber sleeve 53 is inserted into the semi-cylindrical groove of the fan housing 31 or the semi-cylindrical groove of the imported muffler housing 62, and then the butterfly sleeve 45 of the screw assembly 4 is rotated 90° to lock it, the rubber sleeve 53 is compressed and deformed to play a role of pre-tightening and preventing loosening.

[0067] The inlet muffler 6 is composed of a muffler tube 61, a muffler housing 62, a muffler shell 63, a muffler ring 64, a muffler baffle 65 and a sound absorbing material 39. The muffler tube 61 and the muffler baffle 65 are perforated according to the perforation rate required by the sound absorption frequency, and the sound absorbing material 39 is filled in the enclosed cavity to perform fan resistance muffler; the outer surface of the muffler ring 64 is designed with a certain aperture and perforation rate according to the frequency of the micro-perforation muffler, and forms a muffler cavity with the muffler baffle 65, and no sound absorbing material is filled inside to form a resistive muffler cavity; so that the muffler ring 64, the muffler baffle 65 and the internal sound absorbing material 39 constitute a radial double-layer muffler structure. The silencer casing 62 is designed to be small in the middle and large at both ends, with a perforated wall structure, forming an annular space with the silencer shell 63, and the interior is filled with sound-absorbing material 39. The structure composed of the silencer casing 62 and the silencer ring 64 can block most of the noise reflected from the impeller 35 of the fan body 3. At the same time, the inlet silencer 6 is designed to have a constant cross-section to reduce the wind resistance of the airflow entering. Through the external sound absorption structure and the internal sound absorption structure of the inlet silencer 6, a radial two-layer and three-layer silencer structure is formed. At the same time, three semi-cylindrical bosses and buckle pin hole bosses are evenly distributed on the outer circle of the silencer housing 62 for installing the buckle assembly 5. During installation, first, the two parts to be installed are inserted into the positioning groove using the positioning bosses on the outer circle, and then the buckle ring 52 with the rubber sleeve 53 is inserted into the semi-cylindrical groove of the outer boss of the housing, and then the buckle 51 is inserted into the screw assembly 4, and the butterfly sleeve 45 is rotated 90° so that it is sleeved in the limit groove 512 to complete the installation of one buckle assembly 5. The same operation can complete the installation of three buckle assemblies on the circumference. When disassembling, just reverse the operation.

Claims

1. A quick-release low-noise and dust-proof axial flow fan structure with adjustable wind direction, comprising a fan body (3), characterized in that: The fan body (3) is a cylindrical structure, an outlet adjustment component (1) is fixed at the rear end of the fan body (3), a silencer cone (32) is installed in the fan body (3), a motor (34) is fixed at the front end of the casing (31), an impeller (35) is mounted on the motor shaft of the motor (34), a buckle component (5) is arranged at the front end outer edge of the fan body (3), the front end of the fan body (3) is connected to an inlet silencer (6) through the fan body (3), and a buckle component (5) is arranged at the front end outer edge of the inlet silencer (6).

2. The wind direction adjustable quick-release low noise and dustproof axial flow fan structure according to claim 1, characterized in that: The impeller (35) is fixed by a nut (37) and a retaining ring (38) at the end of the motor shaft.

3. The wind direction adjustable quick-release low noise and dustproof axial flow fan structure according to claim 1, characterized in that: The screw assembly (4) is installed on the side of the fan body (3) and the inlet muffler (6) near the front end.

4. The wind direction adjustable quick-release low noise and dustproof axial flow fan structure according to claim 3, characterized in that: The screw assembly (4) is composed of a screw (44), a screw sleeve (41) is fixedly mounted on the screw (44) near the outer end, the inner end of the screw (44) is fixed to the fan body (3) or the inlet muffler (6) through a butterfly sleeve (45), a spring (43) is mounted on the middle section of the screw sleeve (41), and the outer end of the spring (43) is fixed to a washer (42).

5. The wind direction adjustable quick-release low noise and dustproof axial flow fan structure according to claim 1, characterized in that: The outlet adjustment component (1) is composed of an outlet pipe (12), a shutter component (11) with rotatable blades is installed at the middle through cavity position, the end of the outlet pipe (12) is connected to and fixed to the fan body (3) through a rotating buckle (13), and an O-ring (2) is arranged on the outer sleeve of the rotating buckle (13).

6. The wind direction adjustable quick-detachable low noise and dustproof axial flow fan structure according to claim 5, characterized in that: The shutter assembly (11) is composed of a first shutter board (113), a second shutter board (112), and a third shutter board (111) which are sequentially installed on a connecting plate (114) from a center line to both sides; the first shutter board (113), the second shutter board (112), and the third shutter board (111) are all installed in parallel on a rotating shaft, and the rotating shaft is synchronously driven by the connecting plate (114).

7. The wind direction adjustable quick-detachable low noise and dustproof axial flow fan structure according to claim 5, characterized in that: The rotating buckle (13) is composed of a buckle (131) arranged on a semi-cylindrical groove (132).

8. The wind direction adjustable quick-release low noise and dustproof axial flow fan structure according to claim 1, characterized in that: A dustproof structure (36) is installed and fixed on the casing (31) at a position between the motor (34) and the impeller (35); the dustproof structure (36) is composed of a second retaining ring (361) and a first retaining ring (362) which are overlapped and fixed between the impeller (35) and the bearing, and forms a multi-layer maze structure with a baffle (363) fixed to the casing (31); the motor shaft of the motor (34) passes through the second retaining ring (361) and the first retaining ring (362); the silencer cone (32) is coaxially connected and fixed to the casing (31); an outer shell (33) is fixed to the outer layer of the casing (31); and a cavity is provided between the casing (31) and the outer shell (33) and is filled with a sound absorbing material (39).

9. The wind direction adjustable quick-release low noise and dustproof axial flow fan structure according to claim 1, characterized in that: The buckle assembly (5) is composed of a buckle ring (52) rotatably connected to a buckle (51); the buckle ring (52) is fixed to a required mounting surface and / or an imported muffler (6) through a rubber sleeve (53); the buckle ring (52) is connected to the buckle (51) through a buckle ring hole (513); the buckle (51) is also provided with a buckle pin hole (514) parallel to the buckle ring hole (513) for pin limiting; a limiting groove (512) is provided on the inner surface of the buckle (51) for preventing rotation after buckling; and a butterfly sleeve hole (511) is provided at the position of the limiting groove (512).

10. The wind direction adjustable quick-release low noise and dustproof axial flow fan structure according to claim 1, characterized in that: The inlet silencer (6) is composed of a silencer casing (62), the rear edge of which is provided with a hook-shaped structure for matching with a buckle assembly (5); the silencer casing (62) is covered with a silencer shell (63), and a cavity filled with a sound-absorbing material (39) is provided between the silencer casing (62) and the silencer shell (63); a silencer tube (61) is coaxially fixed to the center position of the inner tube of the silencer casing (62), and the silencer tube (61) is filled with a sound-absorbing material (39); a silencer ring (64) is connected and installed on the outer side of the front end of the silencer tube (61), and a silencer baffle (65) is fixed to the rear ends of the silencer ring (64) and the silencer tube (61).

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