Dustproof device of frequency conversion fan

Abstract

The utility model discloses a dustproof device for a frequency conversion fan, which relates to the technical field of frequency conversion fans and comprises the frequency conversion fan, an air inlet pipeline is arranged on the side surface of the frequency conversion fan, four uniformly distributed fixing seats are arranged at the air inlet end of the air inlet pipeline, slots are formed in the fixing seats, and a dustproof cover is arranged on the side surface of the air inlet pipeline. The end, close to the air inlet pipeline, of the dust cover is provided with inserting strips matched with the inserting grooves in a one-to-one correspondence mode, a positioning rod is arranged on the side face of the fixing base at the upper end of the air inlet pipeline, positioning holes are formed in the side faces, corresponding to the positioning rod, of the inserting strips, and a circular connecting frame is arranged in the dust cover and can do reciprocating linear motion in the dust cover. A dustproof net is arranged in the circular connecting frame; the dustproof cover is rapidly installed at the end of the air inlet pipeline through matching of the inserting grooves and the inserting strips, then the dustproof cover is fixed through the positioning rods and the positioning holes, finally the dustproof net is installed, the dustproof effect is achieved, the whole installation process is simple and rapid, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of variable-frequency fans, in particular to a dust-proof device for a variable-frequency fan. Background Technique

[0002] A variable-frequency fan is a fan driven by a variable-frequency motor controlled by a frequency converter. Through the rotation of the fan blades, gas can be sucked in from one end and discharged from the other end to achieve the control of air flow. It is widely used for ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings.

[0003] When existing variable-frequency fans are in use, dust-proof devices are installed. After long-term use, external dust and impurities will directly adhere to the dust-proof devices, affecting the ventilation efficiency and requiring timely cleaning. However, most dust-proof devices are not convenient for disassembly and installation, resulting in a large amount of time-consuming disassembly and installation of the dust-proof devices during cleaning, which affects the work efficiency.

[0004] In view of the above problems, the utility model provides a dust-proof device for a variable-frequency fan. Content of the Utility Model

[0005] The purpose of the utility model is to provide a dust-proof device for a variable-frequency fan. The dust-proof cover is quickly installed at the end of the air inlet pipe through the cooperation of the slot and the insertion strip, and then fixed by the positioning rod and the positioning hole. Finally, the dust-proof net is installed to achieve the dust-proof effect. The whole installation process is simple and fast. Moreover, only by making the circular connection frame move linearly out of the inside of the dust-proof cover, the dust-proof net can be cleaned and replaced without disassembling the whole dust-proof device, saving time and improving work efficiency, thus solving the problems in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A dust-proof device for a variable-frequency fan, including a variable-frequency fan, an air inlet pipe is arranged on the side of the variable-frequency fan, four uniformly distributed fixing seats are arranged at the air inlet end of the air inlet pipe, a slot is opened inside the fixing seat, a dust-proof cover is arranged on the side of the air inlet pipe, insertion strips adapted to and corresponding to the slots one by one are arranged at one end of the dust-proof cover close to the air inlet pipe, a positioning rod is arranged on the side of the fixing seat at the upper end of the air inlet pipe, a positioning hole is opened on the side of the corresponding insertion strip, a circular connection frame is arranged inside the dust-proof cover, the circular connection frame can make a reciprocating linear motion along the inside of the dust-proof cover, and a dust-proof net is arranged inside the circular connection frame.

[0007] Further, a U-shaped frame is fixedly connected to the side of the fixed seat at the upper end of the air inlet duct. The positioning rod is arranged inside the U-shaped frame. The positioning rod is slidably connected to the U-shaped frame and the fixed seat. One end of the positioning rod extends out of the outside of the U-shaped frame and is fixedly connected with a pull ring. A spring is sleeved on the outer surface of the positioning rod. One end of the spring is fixedly connected to the inner wall of the U-shaped frame, and the end of the spring away from the inner wall of the U-shaped frame is fixedly connected to the side of the disc. The disc is fixedly connected to the middle of the positioning rod.

[0008] Further, external threads are provided on the outer surface of the circular connection frame, and internal threads adapted to the external threads are provided on the inner wall of the dust-proof cover.

[0009] Further, a circular handrail is fixedly connected to the side of the circular connection frame close to the air inlet of the air inlet duct.

[0010] Further, a wind outlet fence is provided at the air inlet of the air inlet duct. A number of evenly distributed elastic cards are fixedly connected to the side of the wind outlet fence facing the air inlet duct. Corresponding slots adapted to the elastic cards are provided at the air inlet end of the air inlet duct.

[0011] Further, an installation groove is provided on the side of the circular connection frame away from the air inlet of the air inlet duct. The size of the installation groove is the same as that of the dust-proof net. An adapted installation ring is arranged inside the installation groove. Symmetric fixing blocks are fixedly connected to the side of the installation ring. Corresponding rectangular grooves are provided on the side of the circular connection frame. The fixing blocks are fixedly connected inside the rectangular grooves by bolts.

[0012] Further, two symmetrically arranged handles are fixedly connected to the outer surface of the dust-proof cover.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] When the frequency conversion fan dust-proof device provided by the present utility model is in use, only the end of the dust-proof cover needs to be aligned with the air inlet of the air inlet duct, and then the dust-proof cover is rotated through the handle. The rotation of the dust-proof cover drives the insertion strip to rotate and enter the slot. When the insertion strip completely enters the slot, the staff releases the pull ring, and the positioning rod moves into the positioning hole under the action of the spring force, so as to fix the position of the dust-proof cover, thus completing the installation. Subsequently, the wind outlet fence is opened, and the staff holds the circular handrail and rotates the circular connection frame to connect the external threads of the circular connection frame with the internal threads provided on the inner wall of the wind-proof cover, completing the installation of the dust-proof net and realizing the dust-proof effect. The installation is convenient. When it is necessary to clean the dust-proof net, only the circular connection frame needs to be rotated to make a linear motion away from the inside of the dust-proof cover, and then the dust-proof net can be cleaned and replaced. It is simple and fast without disassembling the whole dust-proof device, improving the work efficiency. Description of the Drawings

[0015] Figure 1Schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 Schematic diagram of the positioning rod in the present utility model;

[0017] Figure 3 Schematic diagram of the dust cover in the present utility model;

[0018] Figure 4 Schematic diagram of the air outlet grille in the present utility model;

[0019] Figure 5 Schematic diagram of the external thread in the present utility model;

[0020] Figure 6 Schematic diagram of the mounting ring in the present utility model.

[0021] In the figure: 1, variable frequency fan; 2, air inlet pipe; 3, fixed seat; 4, slot; 5, dust cover; 6, insertion strip; 7, U-shaped frame; 8, positioning rod; 9, pull ring; 10, spring; 11, disc; 12, positioning hole; 13, handle; 14, air outlet grille; 15, elastic card; 16, card slot; 17, circular connection frame; 18, circular handrail; 19, external thread; 20, internal thread; 21, mounting groove; 22, dust screen; 23, mounting ring; 24, fixing block; 25, rectangular groove; 26, bolt. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] In order to solve the technical problem that the existing dust-proof device for variable frequency fans is inconvenient to disassemble and assemble, resulting in a large amount of time-consuming disassembly and assembly of the dust-proof device during cleaning, which affects work efficiency, as Figure 1-6 shown, the following preferred technical solutions are provided:

[0024] A dust-proof device for a variable-frequency fan, comprising a variable-frequency fan 1. An air inlet pipe 2 is arranged on the side of the variable-frequency fan 1. Four uniformly distributed fixing seats 3 are arranged at the air inlet end of the air inlet pipe 2. A slot 4 is formed inside the fixing seat 3. A dust-proof cover 5 is arranged on the side of the air inlet pipe 2. One end of the dust-proof cover 5 close to the air inlet pipe 2 is provided with inserting strips 6 adapted to and corresponding to the slots 4 one by one. A positioning rod 8 is arranged on the side of the fixing seat 3 at the upper end of the air inlet pipe 2. A positioning hole 12 is formed on the side of the corresponding inserting strip 6 of the positioning rod 8. A circular connecting frame 17 is arranged inside the dust-proof cover 5. The circular connecting frame 17 can perform a reciprocating linear motion along the inside of the dust-proof cover. A dust-proof net 22 is arranged inside the circular connecting frame 17.

[0025] Specifically, during use, only need to align the end of the dust-proof cover 5 with the air inlet of the air inlet pipe 2, and then manually rotate the dust-proof cover 5. The rotation of the dust-proof cover 5 drives the inserting strips 6 to rotate and enter the inside of the slots 4. When the inserting strips 6 completely enter the inside of the slots 4 and the positioning rod 8 enters the positioning holes 12, the position of the dust-proof cover 5 can be fixed, thus completing the installation. Subsequently, let the circular connecting frame 17 perform a linear motion to enter the inside of the dust-proof cover 5 to complete the installation of the dust-proof net 22, achieving the dust-proof effect. The installation is convenient. When it is necessary to clean the dust-proof net 22, only need to let the circular connecting frame 17 perform a linear motion to leave the inside of the dust-proof cover 5, and then the dust-proof net 22 can be cleaned and replaced. It is simple and fast without disassembling the entire dust-proof device, saving a lot of time. The purpose of such a design is to quickly install the dust-proof cover 5 at the end of the air inlet pipe 2 through the cooperation of the slots 4 and the inserting strips 6, then fix the dust-proof cover through the positioning rod 8 and the positioning holes 12, and finally install the dust-proof net 22 to achieve the dust-proof effect. The entire installation process is simple and fast, and only need to let the circular connecting frame 17 perform a linear motion to leave the inside of the dust-proof cover 5, then the dust-proof net 22 can be cleaned and replaced without disassembling the entire dust-proof device, saving time and improving work efficiency.

[0026] Further, as Figure 1 and Figure 2 shown, the following preferred technical solutions are provided:

[0027] A U-shaped frame 7 is fixedly connected to the side of the fixing seat 3 at the upper end of the air inlet pipe 2. The positioning rod 8 is arranged inside the U-shaped frame 7. The positioning rod 8 is slidably connected to the U-shaped frame 7 and the fixing seat 3. One end of the positioning rod 8 extends out of the outside of the U-shaped frame 7 and is fixedly connected with a pull ring 9. A spring 10 is sleeved on the outer surface of the positioning rod 8. One end of the spring 10 is fixedly connected to the inner wall of the U-shaped frame 7, and the end of the spring 10 far from the inner wall of the U-shaped frame 7 is fixedly connected to the side of a disc 11. The disc 11 is fixedly connected to the middle of the positioning rod 8. The purpose of such a design is to drive the positioning rod 8 to move by manually moving the pull ring 9 to release the positioning of the dust-proof cover 5 and compress the spring 10. The spring 10 can drive the positioning rod 8 to move through its own elastic force to realize the fixing of the dust-proof cover 5.

[0028] Further, as Figure 3 and Figure 5 shown, the following preferred technical solutions are provided:

[0029] The outer surface of the circular connection frame 17 is provided with an external thread 19, and the inner wall of the dust-proof cover 5 is provided with an internal thread 20 adapted to the external thread 19. The purpose of such design is to connect the external thread 19 of the circular connection frame 17 with the internal thread 20 provided on the inner wall of the wind-proof cover 5, so that the dust-proof net 22 can be quickly installed inside the dust-proof cover 5, facilitating dust prevention during air intake. The structure is simple, facilitating installation and disassembly, and convenient for later maintenance and replacement.

[0030] Further, as Figure 5 shown, the following preferred technical solutions are provided:

[0031] The side of the circular connection frame 17 close to the air inlet of the air inlet duct 2 is fixedly connected with a circular handrail 18. The purpose of such design is to facilitate the movement of the circular connection frame 17 through the circular handrail 18.

[0032] Further, as Figure 3 and Figure 4 shown, the following preferred technical solutions are provided:

[0033] The air inlet of the air inlet duct 2 is provided with an air inlet grille 14. A plurality of uniformly distributed elastic cards 15 are fixedly connected to the side of the air inlet grille 14 facing the air inlet duct 2. The air inlet end of the air inlet duct 2 is provided with a card slot 16 corresponding to and adapted to the elastic cards 15 for snap-fitting. The purpose of such design is to prevent foreign objects, garbage, animals, etc. from the outside from entering the dust-proof cover 5 through the air inlet grille 14, avoiding damage to the internal structural components of the dust-proof cover 5.

[0034] Further, as Figure 6 shown, the following preferred technical solutions are provided:

[0035] An installation groove 21 is provided on the side of the circular connection frame 17 away from the air inlet of the air inlet duct 2. The size of the installation groove 21 is the same as that of the dust-proof net 22. An adapted installation ring 23 is arranged inside the installation groove 21. Symmetric fixing blocks 24 are fixedly connected to the side of the installation ring 23. A corresponding rectangular groove 25 is provided on the side of the circular connection frame 17. The fixing blocks 24 are fixedly connected inside the rectangular groove 25 through bolts 26. The purpose of such design is to facilitate the fixing of the dust-proof net 22 on the circular connection frame 17 through the rectangular groove 25, then press and fix it through the installation ring 23, and finally fix the installation ring 23 on the circular connection frame 17 through bolts 26, realizing the installation and fixing of the dust-proof net 22, and facilitating the later maintenance and replacement of the dust-proof net 22.

[0036] Further, as Figure 1As shown in the figure, the following preferred technical solutions are provided:

[0037] Two symmetrically arranged handles 13 are fixedly connected to the outer surface of the dust cover 5. The purpose of this design is to facilitate the handling of the dust cover 5 by the staff through the handles 13.

[0038] In summary: during use, only the end of the dust cover 5 needs to be aligned with the air inlet of the air inlet pipe 2, and then the dust cover 5 is rotated through the handle 13. The rotation of the dust cover 5 drives the insertion strip 6 to rotate and enter the inside of the slot 4. When the insertion strip 6 completely enters the inside of the slot 4, the staff releases the pull ring 9, and the positioning rod 8 moves into the positioning hole 12 under the action of the elastic force of the spring 10, so that the position of the dust cover 5 can be fixed, thus completing the installation. Subsequently, the air outlet fence 14 is opened, and the staff grabs the circular handrail 18 and rotates the circular connection frame 17 to connect the external thread 19 of the circular connection frame 17 with the internal thread 20 provided on the inner wall of the windproof cover 5, completing the installation of the dust screen 22 and achieving the dust prevention effect. The installation is convenient. When it is necessary to clean the dust screen 22, only the circular connection frame 17 needs to be rotated to make a linear movement away from the inside of the dust cover 5, so that the dust screen 22 can be cleaned and replaced. It is simple and fast without disassembling the entire dust prevention device, improving the work efficiency.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust-proof device for a variable-frequency fan, comprising a variable-frequency fan (1), characterized in that: A side of the variable-frequency fan (1) is provided with an air inlet duct (2). The air inlet end of the air inlet duct (2) is provided with four uniformly distributed fixing seats (3). A slot (4) is formed inside the fixing seat (3). A dust-proof cover (5) is arranged on the side of the air inlet duct (2). One end of the dust-proof cover (5) close to the air inlet duct (2) is provided with insertion strips (6) that are adapted to and correspond to the slots (4) one by one. A positioning rod (8) is arranged on the side of the fixing seat (3) at the upper end of the air inlet duct (2). A positioning hole (12) is formed on the side of the corresponding insertion strip (6) of the positioning rod (8). A circular connecting frame (17) is arranged inside the dust-proof cover (5), and the circular connecting frame (17) can perform reciprocating linear motion along the inside of the dust-proof cover (5). A dust-proof net (22) is arranged inside the circular connecting frame (17).

2. The dust-proof device for a variable-frequency fan according to claim 1, characterized in that: The side of the fixing seat (3) at the upper end of the air inlet duct (2) is fixedly connected with a U-shaped frame (7). The positioning rod (8) is arranged inside the U-shaped frame (7). The positioning rod (8) is slidably connected with the U-shaped frame (7) and the fixing seat (3). One end of the positioning rod (8) extends out of the outside of the U-shaped frame (7) and is fixedly connected with a pull ring (9). A spring (10) is sleeved on the outer surface of the positioning rod (8). One end of the spring (10) is fixedly connected to the inner wall of the U-shaped frame (7), and the end of the spring (10) far from the inner wall of the U-shaped frame (7) is fixedly connected to the side of a disc (11). The disc (11) is fixedly connected to the middle of the positioning rod (8).

3. The dust-proof device for a variable-frequency fan according to claim 1, wherein: An external thread (19) is formed on the outer surface of the circular connecting frame (17), and an internal thread (20) adapted to the external thread (19) is formed on the inner wall of the dust-proof cover (5).

4. The dust-proof device for a variable-frequency fan according to claim 1, wherein: A circular handrail (18) is fixedly connected to the side of the circular connecting frame (17) close to the air inlet of the air inlet duct (2).

5. The dust-proof device for a variable-frequency fan according to claim 1, characterized in that: An air inlet grille (14) is arranged at the air inlet of the air inlet duct (2). A number of uniformly distributed elastic cards (15) are fixedly connected to the side of the air inlet grille (14) facing the air inlet duct (2). A card slot (16) adapted to and corresponding to the elastic cards (15) one by one is formed at the air inlet end of the air inlet duct (2).

6. The dust-proof device for a variable-frequency fan according to claim 1, wherein: An installation groove (21) is formed on the side of the circular connecting frame (17) far from the air inlet of the air inlet duct (2). The size of the installation groove (21) is the same as that of the dust-proof net (22). An adapted installation ring (23) is arranged inside the installation groove (21). Symmetric fixing blocks (24) are fixedly connected to the side of the installation ring (23). Corresponding rectangular grooves (25) are formed on the side of the circular connecting frame (17). The fixing blocks (24) are fixedly connected inside the rectangular grooves (25) through bolts (26).

7. A dust-proof device for a variable-frequency fan according to claim 1, characterized in that: Two symmetrically arranged handles (13) are fixedly connected to the outer surface of the dust-proof cover (5).

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