Negative pressure fan with dustproof structure

Abstract

The utility model relates to the technical field of negative pressure fans, in particular to a negative pressure fan with a dustproof structure, which comprises a negative pressure fan body, a fixing structure, mounting plates and a filter screen, the fixing structure comprises a first fixing frame, the four corners of the inner wall of the first fixing frame are fixedly connected with the mounting plates, and the filter screen is fixedly connected with the mounting plates. The left side and the right side of the bottom end of the first fixing frame are both fixedly connected with first fixing seats, the first fixing frame is rotationally connected with a second fixing frame, the left side and the right side of the bottom end of the second fixing frame are both fixedly connected with second fixing seats, the second fixing seats correspond to the first fixing seats in position, and the first fixing seats and the second fixing seats are both in threaded connection with threaded rods. The first fixing frame is connected with a filter screen in a clamped mode. The filter screen is provided with the fixing structure, so that the filter screen can be quickly mounted and dismounted, the filter screen can be conveniently cleaned or replaced, and the filter screen is convenient and quick to use, does not need fixing bolts and tools, and is convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of negative pressure fan technology, specifically relating to a negative pressure fan with a dustproof structure. Background Technology

[0002] Negative pressure fans utilize the cooling principle of air convection and negative pressure ventilation. They are machines that naturally draw in fresh air from the opposite side of the installation location—a door or window—and rapidly force-expel hot, stuffy air from the room to the outside. They can improve any ventilation problem, achieving a cooling and ventilation efficiency of 90%-97%. However, currently used negative pressure fans are often affected by rain and snow, and dust and impurities in the air can also affect the fan equipment and human health.

[0003] However, existing negative pressure fans often lack the function of quickly installing and removing the filter screen. Existing negative pressure fans often fix the filter screen to the outer shell with fixing bolts, which is time-consuming and laborious to disassemble, and inconvenient to clean and replace the filter screen, causing inconvenience during use. Therefore, there is an urgent need for a negative pressure fan with a dustproof structure to solve the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a negative pressure fan with a dustproof structure, so as to solve the problem mentioned in the background art that the existing negative pressure fans often do not have the function of quick installation and removal of the filter screen. The existing negative pressure fans often fix the filter screen to the outer shell with fixing bolts, which is time-consuming and laborious to disassemble, and is inconvenient to clean and replace the filter screen, causing inconvenience during use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a negative pressure fan with a dustproof structure, comprising a negative pressure fan body, a fixing structure, a mounting plate, and a filter screen. The fixing structure includes a fixing frame one, with mounting plates fixedly connected to the four corners of the inner wall of the fixing frame one. Fixing seats one is fixedly connected to the left and right sides of the bottom end of the fixing frame one. The fixing frame one is rotatably connected to a fixing frame two, with fixing seats two fixedly connected to the left and right sides of the bottom end of the fixing frame two. The fixing seats two correspond to the positions of the fixing seats one. Both the fixing seats one and the fixing seats two are threadedly connected to threaded rods. The fixing frame one is snapped into the filter screen.

[0006] Preferably, the front side of the fixing frame is provided with a groove, which engages with the frame of the filter screen.

[0007] Preferably, two slots are provided at both the left and right ends of the front side of the fixed frame, and the slots are used to engage the handle.

[0008] Preferably, one end of a hinge is fixedly connected to the top of the first fixed frame, and the other end of the hinge is fixedly connected to the second fixed frame.

[0009] Preferably, handle one is fixedly connected to the front side of the fixed frame two, and handle two is fixedly connected to both the left and right sides of the filter screen. The surfaces of handle one and handle two are provided with an anti-slip coating.

[0010] Preferably, a hand-tightening nut is fixedly connected to the front side of the threaded rod, and the surface of the hand-tightening nut is provided with an uneven pattern.

[0011] Preferably, the mounting plate is threadedly connected to a fixing bolt, and the fixing bolt is threadedly connected to the outer casing of the negative pressure fan body.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The negative pressure fan with a dustproof structure is equipped with a mounting plate and fixing bolts. The mounting plate is fixed to the front side of the negative pressure fan body shell by fixing bolts, thereby fixing the fixing frame to the front side of the negative pressure fan body. The fixing structure can be quickly installed on the negative pressure fan body by mounting plate and fixing bolts, which is convenient and quick to install and easy to use.

[0014] 2. This negative pressure fan with a dustproof structure has a fixed structure. When the filter needs to be replaced, turn the hand-tightening nut to rotate the threaded rod, causing the threaded rod to move forward and no longer fix the position of the fixed seat. Pull the handle one to flip the fixed frame two upward, so that the fixed frame two no longer fixes the position of the filter. Pull the handle two to pull it out of the slot, and the filter can be removed for cleaning or replacement. After cleaning, the filter is re-clamped into the fixed frame one. Flip the fixed frame two to fix the position of the filter. Tighten the hand-tightening nut to complete the installation of the filter. The fixed structure allows for quick installation and removal of the filter, making it easy to clean or replace. It is convenient and quick to use, and requires no fixing bolts or tools. Attached Figure Description

[0015] Figure 1 This is a front perspective view of the present utility model;

[0016] Figure 2 This is a schematic diagram illustrating the use of this utility model;

[0017] Figure 3 This is a schematic diagram of the fixing structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the exploded structure of the fixed structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the exploded structure of the filter screen of this utility model.

[0020] In the diagram: 1. Negative pressure fan body; 2. Fixing structure; 21. Fixing frame one; 22. Groove; 23. Slot; 24. Fixing seat one; 25. Hinge; 26. Fixing frame two; 27. Handle one; 28. Fixing seat two; 29. ​​Hand-tightening nut; 210. Threaded rod; 3. Mounting plate; 31. Fixing bolt; 4. Filter screen; 41. Handle two. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides an embodiment of a negative pressure fan with a dustproof structure, including a negative pressure fan body 1, a fixing structure 2, a mounting plate 3, and a filter screen 4. The fixing structure 2 includes a fixing frame 21, with mounting plates 3 fixedly connected to the four corners of the inner wall of the fixing frame 21. Fixing seats 24 are fixedly connected to the left and right sides of the bottom of the fixing frame 21. The fixing frame 21 is rotatably connected to a fixing frame 26. Fixing seats 28 are fixedly connected to the left and right sides of the bottom of the fixing frame 26. The fixing seats 28 are positioned corresponding to the fixing seats 24. Both the fixing seats 24 and the fixing seats 28 are threadedly connected to threaded rods 210. The fixing frame 21 is snapped with the filter screen 4.

[0023] Furthermore, a groove 22 is provided on the front side of the fixed frame 21. The groove 22 engages with the frame of the filter screen 4, allowing the filter screen 4 to be installed inside the fixed frame 21.

[0024] Furthermore, two slots 23 are provided on the left and right ends of the front side of the fixed frame 21. The slots 23 engage with the handle 41. Pulling the handle 41 will cause it to be pulled out of the slots 23.

[0025] Furthermore, one end of the hinge 25 is fixedly connected to the top of the first fixed frame 21, and the other end of the hinge 25 is fixedly connected to the second fixed frame 26, so that the first fixed frame 21 can rotate relative to the second fixed frame 26 through the hinge 25.

[0026] Furthermore, handle 27 is fixedly connected to the front side of fixed frame 26, and handle 41 is fixedly connected to both the left and right sides of filter screen 4. The surfaces of handle 27 and handle 41 are provided with anti-slip coating, which prevents slippage when handle 27 and handle 41 are pulled.

[0027] Furthermore, a hand-tightening nut 29 is fixedly connected to the front side of the threaded rod 210. The surface of the hand-tightening nut 29 is provided with uneven patterns. Rotating the hand-tightening nut 29 causes the threaded rod 210 to rotate, thus moving the threaded rod 210 forward.

[0028] Furthermore, the mounting plate 3 is threadedly connected to the fixing bolt 31, and the fixing bolt 31 is threadedly connected to the outer shell of the negative pressure fan body 1. The mounting plate 3 is fixed to the front side of the outer shell of the negative pressure fan body 1 by the fixing bolt 31.

[0029] Working principle:

[0030] In use, the mounting plate 3 is fixed to the front side of the negative pressure fan body 1 using the fixing bolts 31, thereby fixing the fixing frame 21 to the front side of the negative pressure fan body 1. The fixing structure 2 can be quickly installed on the negative pressure fan body 1 using the mounting plate 3 and fixing bolts 31. The installation is convenient and quick, and easy to use. The air intake of the fixing structure 2 is filtered by the filter screen 4, which can play a role in dust prevention and prevent dust from entering the negative pressure fan body 1 and causing damage to the motor inside the negative pressure fan body 1. When it is necessary to replace the filter screen 4, turn the hand nut 29, which will drive the threaded rod 210 to rotate, causing the threaded rod 210 to move forward and no longer fix the threaded rod 210 to the fixing seat. Pull handle 27 at position 28 to rotate the fixing frame 26 upwards, thus removing the filter screen 4 from its position. Pull handle 41 out of the slot 23 to remove the filter screen 4 for cleaning or replacement. After cleaning, re-attach the filter screen 4 to the fixing frame 21. Rotate the fixing frame 26 to fix the filter screen 4 in place. Tighten the hand nut 29 to complete the installation of the filter screen 4. The fixing structure 2 allows for quick installation and removal of the filter screen 4, facilitating cleaning and replacement. It is convenient and quick to use, requiring no bolts or tools.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A negative pressure fan with a dustproof structure, comprising a negative pressure fan body (1), a fixing structure (2), a mounting plate (3), and a filter screen (4), characterized in that: The fixing structure (2) includes a fixing frame one (21), with mounting plates (3) fixedly connected to the four corners of the inner wall of the fixing frame one (21), fixing seats one (24) fixedly connected to the left and right sides of the bottom of the fixing frame one (21), fixing frame one (21) is rotatably connected to a fixing frame two (26), fixing seats two (28) fixedly connected to the left and right sides of the bottom of the fixing frame two (26), fixing seats two (28) are corresponding to the position of fixing seats one (24), fixing seats one (24) and fixing seats two (28) are threadedly connected to threaded rods (210), and the fixing frame one (21) is snapped into a filter screen (4).

2. The negative pressure fan with a dustproof structure according to claim 1, characterized in that: The front side of the fixed frame (21) is provided with a groove (22), which is engaged with the frame of the filter screen (4).

3. A negative pressure fan with a dustproof structure according to claim 1, characterized in that: Two slots (23) are provided on the left and right ends of the front side of the fixed frame (21), and the slots (23) engage with the handle (41).

4. A negative pressure fan with a dustproof structure according to claim 1, characterized in that: The top of the first fixed frame (21) is fixedly connected to one end of the hinge (25), and the other end of the hinge (25) is fixedly connected to the second fixed frame (26).

5. A negative pressure fan with a dustproof structure according to claim 1, characterized in that: The front side of the fixed frame 2 (26) is fixedly connected to the handle 1 (27), and the left and right sides of the filter screen (4) are fixedly connected to the handle 2 (41). The surfaces of the handle 1 (27) and the handle 2 (41) are provided with anti-slip coating.

6. A negative pressure fan with a dustproof structure according to claim 1, characterized in that: The front side of the threaded rod (210) is fixedly connected to a hand-tightening nut (29), and the surface of the hand-tightening nut (29) is provided with an uneven pattern.

7. A negative pressure fan with a dustproof structure according to claim 1, characterized in that: The mounting plate (3) is threadedly connected to the fixing bolt (31), and the fixing bolt (31) is threadedly connected to the outer shell of the negative pressure fan body (1).

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