High-stability negative pressure fan

Abstract

The utility model relates to the technical field of negative pressure fans, and discloses a high-stability negative pressure fan which comprises limiting blocks symmetrically and slidably connected to the inner side wall of a cavity. One end of the rod body is fixedly connected to the top of the limiting block, and the other end penetrates and extends to the top of the frame; the spring is fixedly connected between the limiting block and the cavity, and the rod body is sleeved with the spring; the placing grooves are symmetrically formed in the front side wall of the frame; the fixed blocks are symmetrically and fixedly connected to the outer side wall of the filter screen; and the limiting grooves are symmetrically formed in the fixing block. When the filter screen needs to be replaced, the pulling plates on the two sides are lifted upwards, the pulling plates drive the limiting blocks to be separated from the limiting grooves, the springs are compressed and pulled out forwards at the moment, the filter screen can be detached, then the fixing blocks on the two sides of the cleaned or replaced filter screen enter the containing grooves, the pulling plates are loosened, and the springs generating elasticity after deformation drive the limiting blocks to move downwards; the limiting block is inserted into the limiting groove, so that the fixed block and the filter screen are fixed and limited, and the filter screen is conveniently replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to negative pressure fan technical field, concretely is a high stability negative pressure fan. BACKGROUND

[0002] The negative pressure fan is the latest type of ventilator, belongs to axial flow fan, because mainly applied to negative pressure type ventilation cooling engineering and is called negative pressure fan. The negative pressure type ventilation cooling engineering contains ventilation and cooling two aspects meaning, ventilation and cooling problem solves simultaneously. The negative pressure fan is also applied to the positive pressure type water curtain environmental protection air conditioner, positive pressure air supply, positive pressure air blowing and other fields.

[0003] The existing high pressure fan needs to install the filter screen at the air inlet to prevent dust, but dust is easy to block the filter screen after long-term use, thereby affecting the normal use effect of the negative pressure fan. UTILITY MODEL CONTENT

[0004] (I) the technical problem solved

[0005] In view of the deficiency of prior art, the utility model provides a high stability negative pressure fan, has the advantages of convenient filter screen replacement, solves the problem that the filter screen used by the existing negative pressure fan is easy to block, thereby affecting the air intake and use effect.

[0006] (II) technical scheme

[0007] In order to achieve the above object, the utility model provides the following technical scheme: a high stability negative pressure fan, including main body assembly, the main body assembly includes:

[0008] The negative pressure fan body is provided with an outer shell on the outer side wall;

[0009] The filter screen is arranged on the negative pressure fan body and the front side wall of the outer shell;

[0010] The outer shell and the filter screen are provided with a dismounting assembly, and the dismounting assembly comprises:

[0011] The frame is symmetrically and fixedly connected to the front side wall of the outer shell;

[0012] The cavity is symmetrically arranged in the frame;

[0013] The limiting block is symmetrically and slidingly connected to the inner side wall of the cavity;

[0014] The rod body is fixedly connected to the top of the limiting block, and the other end penetrates and extends to the top of the frame;

[0015] The pull plate is fixedly connected to the top end of the rod body;

[0016] The spring is fixedly connected between the limiting block and the cavity, and the spring is sleeved on the outside of the rod body;

[0017] A placing groove is symmetrically arranged on the front side wall of the frame;

[0018] A fixing block is symmetrically and fixedly connected to the outer side wall of the filter screen;

[0019] A limiting groove is symmetrically arranged on the fixing block.

[0020] Preferably, the front side wall of the filter screen is symmetrically and fixedly connected with two handles.

[0021] Preferably, the outer part of the rod is provided with a linkage plate, the linkage plate is provided with a through groove for the movement of the rod, the linkage plate is located below the pull plate, and the top of the linkage plate is fixedly connected with a handle.

[0022] Preferably, the bottom of the limiting block has an inclined surface.

[0023] Preferably, the height of the placing groove is equal to the height of the fixing block.

[0024] Preferably, the outer side wall of the shell is symmetrically and fixedly connected with a connecting plate, and the connecting plate is provided with screw holes.

[0025] (Three) beneficial effects

[0026] Compared with the prior art, the utility model provides a high-stability negative pressure fan, which has the following beneficial effects:

[0027] The negative pressure fan has the advantages of convenient filter screen replacement. When the filter screen needs to be replaced, the staff pulls up the pull plate on both sides, the pull plate drives the rod to move upwards, the spring is compressed, the limiting block at the bottom of the rod is separated from the limiting groove, at this time, the staff pulls out the filter screen to the front side, and the disassembly of the filter screen can be realized, then the cleaned or replaced filter screen is inserted between the frames, the fixing blocks on both sides of the filter screen enter the placing grooves, at this time, the staff releases the pull plate, the spring with elasticity after deformation drives the limiting block to move downwards, so that the limiting block is inserted into the limiting groove, thereby realizing the fixing and limiting of the fixing block and the filter screen, and the convenient replacement of the filter screen is completed. The problem that the filter screen used by the existing negative pressure fan is easy to block, thereby affecting the air inlet amount and use effect is solved. ACCOUT OF DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 It is an enlarged structural schematic diagram of A in the utility model;

[0030] Figure 3 It is a filter screen dismounting structural schematic diagram in the utility model;

[0031] Figure 4 It is the left view cross section structure schematic diagram of the frame in the utility model.

[0032] In the drawing:

[0033] 1, main component; 11, negative pressure fan body; 12, shell; 13, filter screen;

[0034] 2, disassembly assembly; 21, frame; 22, cavity; 23, limiting block; 24, rod body; 241, pull plate; 242, linkage plate; 243, handle one; 25, spring; 26, placing groove; 27, fixed block; 271, limiting groove;

[0035] 3, connecting plate; 31, screw hole; 4, handle two. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0037] Embodiment one

[0038] Referring to Figures 1-4 A high-stability negative pressure fan, comprising a main component 1, the main component 1 comprises: a negative pressure fan body 11, which is provided with a shell 12 on the outer side wall; a filter screen 13, which is arranged on the front side wall of the negative pressure fan body 11 and the shell 12; the shell 12 and the filter screen 13 are provided with a disassembly assembly 2, the disassembly assembly 2 comprises: a frame 21, which is symmetrically and fixedly connected to the front side wall of the shell 12; a cavity 22, which is symmetrically opened in the frame 21; a limiting block 23, which is symmetrically and slidingly connected to the inner side wall of the cavity 22; a rod body 24, one end of which is fixedly connected to the top of the limiting block 23, and the other end penetrates and extends to the top of the frame 21; a pull plate 241, which is fixedly connected to the top end of the rod body 24; a spring 25, which is fixedly connected between the limiting block 23 and the cavity 22, and the spring 25 is sleeved on the outside of the rod body 24; a placing groove 26, which is symmetrically opened on the front side wall of the frame 21; a fixed block 27, which is symmetrically and fixedly connected to the outer side wall of the filter screen 13; a limiting groove 271, which is symmetrically opened on the fixed block 27. The front side wall of the filter screen 13 is symmetrically and fixedly connected with a handle two 4. The outside of the rod body 24 is provided with a linkage plate 242, a through groove is formed in the linkage plate 242 for the movement of the rod body 24, the linkage plate 242 is located below the pull plate 241, and a handle one 243 is fixedly connected to the top of the linkage plate 242.

[0039] When the filter screen 13 needs to be replaced, the worker pulls up the two pull plates 241, the pull plates 241 drive the rod body 24 to move upwards, the spring 25 is compressed, and the limiting block 23 at the bottom of the rod body 24 is out of the limiting groove 271, at this time the worker pulls out the filter screen 13 to the front side, and then inserts the cleaned or replaced filter screen 13 between the frame 21, the fixed block 27 on both sides of the filter screen 13 enters the placing groove 26, at this time the worker releases the pull plate 241, the spring 25 which is elastic after deformation drives the limiting block 23 to move downwards, so that the limiting block 23 is inserted into the limiting groove 271, thereby fixing and limiting the fixed block 27 and the filter screen 13, and the convenient replacement of the filter screen 13 is completed. When the filter screen 13 is replaced, the handle two 4 outside the filter screen 13 is convenient for the worker to take and place the filter screen 13, thereby increasing the convenience in use. When the worker pulls up the handle one 243, the handle one 243 drives the linkage plate 242 to move upwards, and the linkage plate 242 drives the rod body 24 to move upwards through the pull plate 241 at the top, thereby achieving the effect that the two pull plates 241 are controlled at the same time, which is convenient for the worker to use.

[0040] The convenient replacement of the filter screen 13 directly or indirectly improves the stability of the negative pressure fan body 11 through mechanisms such as reducing the running resistance, reducing the maintenance cost, and shortening the downtime. The above-mentioned negative pressure fan body 11 works by the principle of air convection and negative pressure difference. The motor drives the impeller to rotate at high speed, and the impeller rapidly discharges the air in the negative pressure fan body 11 in the rotating process, so that a negative pressure area is formed inside the negative pressure fan body 11. Due to the action of atmospheric pressure, the outside air will automatically enter the fan through the air inlet under the push of the pressure difference, and then be discharged by the impeller, thereby realizing the continuous exchange of indoor and outdoor air, achieving the purposes of ventilation, air exchange, cooling, etc. The specific use process of the negative pressure fan body 11 is not repeated here.

[0041] Embodiment two

[0042] According to the basis of embodiment one, an auxiliary function is added.

[0043] Referring to Figures 1-4 The bottom of the limiting block 23 has an inclined surface. The height of the placing groove 26 is equal to the height of the fixed block 27. The outer side wall of the shell 12 is symmetrically and fixedly connected with the connecting plate 3, and screw holes 31 are formed in the connecting plate 3.

[0044] The slope of the bottom of the limiting block 23 enables the worker to install the filter screen 13 without lifting the rod body 24 in advance: the worker directly inserts the fixed blocks 27 on both sides of the filter screen 13 into the placing grooves 26, pushes the limiting block 23 into the cavity 22 after the edges of the fixed blocks 27 contact the slope of the limiting block 23, and the spring 25 is extruded, when the fixed blocks 27 completely enter the inside of the placing grooves 26, at this time, the limiting block 23 and the limiting groove 271 are in the same longitudinal axis, the spring 25 automatically pops the limiting block 23 into the limiting groove 271, thereby realizing the automatic fixing effect of the filter screen 13. The equal height of the placing groove 26 and the fixed block 27 enables the fixed block 27 to not shake in the placing groove 26 when the fixed block 27 is inserted into the inside of the placing groove 26, thereby improving the stability of the filter screen 13 after installation. The connecting plate 3 and the screw hole 31 outside the shell 12 facilitate the worker to install the negative pressure fan body 11 in a suitable area according to the demand.

[0045] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-stability negative pressure fan, comprising a main body assembly (1), the main body assembly (1) comprising: a negative pressure fan body (11), the outer side wall of which is provided with an outer shell (12); a filter screen (13) arranged on the front side wall of the negative pressure fan body (11) and the outer shell (12); characterized in that: the outer shell (12) and the filter screen (13) are provided with a disassembly assembly (2), the disassembly assembly (2) comprising: a frame (21) symmetrically and fixedly connected to the front side wall of the outer shell (12); a cavity (22) symmetrically arranged in the frame (21); a limiting block (23) symmetrically and slidingly connected to the inner side wall of the cavity (22); a rod body (24) fixedly connected to the top of the limiting block (23) at one end and extending through the other end to the top of the frame (21); a pull plate (241) fixedly connected to the top end of the rod body (24); a spring (25) fixedly connected between the limiting block (23) and the cavity (22), the spring (25) being sleeved on the outside of the rod body (24); a placing groove (26) symmetrically arranged on the front side wall of the frame (21); a fixed block (27) symmetrically and fixedly connected to the outer side wall of the filter screen (13); a limiting groove (271) symmetrically arranged on the fixed block (27).

2. The high-stable negative pressure fan according to claim 1, characterized in that: The front side wall of the filter screen (13) is symmetrically and fixedly connected with a second handle (4).

3. The high-stable negative pressure fan according to claim 2, characterized in that: The outside of the rod body (24) is provided with a linkage plate (242), the linkage plate (242) is provided with a through groove for the movement of the rod body (24), the linkage plate (242) is located below the pull plate (241), and the top of the linkage plate (242) is fixedly connected with a first handle (243).

4. The high-stable negative pressure fan according to claim 3, characterized in that: The bottom of the limiting block (23) has an inclined surface.

5. The high-stable negative pressure fan according to claim 4, characterized in that: The height of the placing groove (26) is equal to the height of the fixed block (27).

6. The high-stable negative pressure fan according to claim 5, characterized in that: The outer side wall of the outer shell (12) is symmetrically and fixedly connected with a connecting plate (3), and the connecting plate (3) is provided with a threaded hole (31).

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