Novel negative pressure fan

Abstract

The utility model relates to the technical field of draught fans, and discloses a novel negative pressure draught fan which comprises a draught fan frame, supporting columns are arranged in the middles of the front end and the rear end of the inner side of the draught fan frame respectively, blocking nets are arranged on the left sides and the right sides of the two supporting columns respectively, and installation blocks are connected to the four corners of the outer sides of the four blocking nets respectively. Mounting holes are formed in the multiple mounting blocks, the multiple mounting blocks are mounted on the fan frame and the supporting column through fastening bolts, a first sound absorption plate and a second sound absorption plate are mounted at the top and the bottom of the inner side of the fan frame correspondingly, and a cover body is connected to the left side wall of the interior of the fan frame through the supporting block; a wind impeller is arranged in the cover body, and a rotating shaft is connected to the axis of the wind impeller. According to the utility model, the first sound-absorbing plate and the second sound-absorbing plate are arranged, so that the noise generated when the fan works can be absorbed and reduced, and the noise pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a novel negative pressure fan. Background Art

[0002] Negative pressure fan uses the cooling principle of air convection and negative pressure ventilation. It naturally draws in fresh air from the opposite side of the installation location - the door or window, and quickly forces the stuffy air in the room to be discharged outdoors. It can improve any poor ventilation problem, and the cooling and ventilation effect can reach 90%-97%.

[0003] The existing negative pressure fan, when in use, cannot absorb and reduce the noise generated by the fan when it is working, resulting in large noise pollution. Secondly, it is impossible to block debris at the air inlet and outlet of the fan, resulting in low safety during use. Therefore, a new type of negative pressure fan is urgently needed to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a new type of negative pressure fan to solve the problem that the existing negative pressure fan proposed in the above background technology cannot absorb and reduce the noise generated by the fan when it is working, resulting in large noise pollution, and secondly, it cannot block debris at the air inlet and outlet of the fan, resulting in low safety during use.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A novel negative pressure fan comprises a fan frame, wherein support columns are arranged at the middle of the front and rear ends of the inner side of the fan frame, and baffles are arranged on the left and right sides of the two support columns, and mounting blocks are connected to the four outer corners of the four baffles, and mounting holes are opened on the plurality of mounting blocks, and the plurality of mounting blocks are mounted on the fan frame and the support columns by fastening bolts, and a first sound absorbing panel and a second sound absorbing panel are respectively mounted on the inner top and bottom of the fan frame, and a cover body is connected to the inner left side wall of the fan frame through the support blocks, and a wind impeller is arranged inside the cover body, and a rotating shaft is connected to the axis center of the wind impeller, and the front end of the rotating shaft is connected to the side wall of the support column through a support seat, and a driven wheel is arranged on the rotating shaft, and the driven wheel is connected to the driving wheel at the lower right through a belt, and a motor is mounted at the axis center of the driving wheel, and the bottom of the motor is connected to the inner right side wall of the fan frame through a support platform.

[0007] As a preferred technical solution of the utility model, the driving wheel and the driven wheel are both located in front of the cover body, and the four blocking nets are all embedded in the front and rear ends of the fan frame.

[0008] As a preferred technical solution of the present invention, the first sound absorbing panel and the second sound absorbing panel have the same structure and size.

[0009] As a preferred technical solution of the present invention, the first sound absorbing panel and the second sound absorbing panel are located between the front and rear support columns.

[0010] As a preferred technical solution of the utility model, the cover body is located between the first sound absorbing board and the second sound absorbing board.

[0011] As a preferred technical solution of the utility model, the number of the mounting blocks is set to sixteen, and eight mounting blocks are respectively set on the front and rear sides of the fan frame.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model provides a first sound absorbing panel and a second sound absorbing panel, thereby achieving sound absorption and noise reduction of the noise generated when the fan is working, thereby reducing noise pollution.

[0014] 2. The utility model provides a plurality of blocking nets, mounting blocks, fastening bolts and mounting holes, and utilizes the mutual cooperation between the plurality of blocking nets, mounting blocks, fastening bolts and mounting holes, so as to block debris at the air inlet and outlet of the fan, thereby improving safety during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model after the retaining net is removed;

[0018] Figure 3 This is a structural schematic diagram of the installation relationship between the fan frame and the retaining net of the utility model;

[0019] Figure 4 This is a structural schematic diagram of the positional relationship between the fan frame, cover body and wind impeller of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the connection relationship between the fan frame and the support column 2 of the utility model.

[0021] In the figure: 1. fan frame; 2. support column; 3. first sound absorbing panel; 4. second sound absorbing panel; 5. baffle; 6. mounting block; 7. fastening bolts; 8. support block; 9. cover; 10. impeller; 11. rotating shaft; 12. driven wheel; 13. belt; 14. driving wheel; 15. motor; 16. support platform. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. The different types of section lines in the drawings in the embodiments of the utility model are not marked according to the national standard, nor are there any requirements for the materials of the components, but are used to distinguish the cross-sectional views of the components in the drawings.

[0023] See also Figure 1-5 A novel negative pressure fan comprises a fan frame 1, support columns 2 are arranged at the middle of the front and rear ends of the inner side of the fan frame 1, and blocking nets 5 are arranged on the left and right sides of the two support columns 2. Four blocking nets 5 are connected to four outer corners of the four blocking nets 5. Multiple mounting blocks 6 are provided with mounting holes. Multiple mounting blocks 6 are mounted on the fan frame 1 and the support columns 2 by fastening bolts 7. The first sound absorbing board 3 and the second sound absorbing board 4 are respectively installed on the top and bottom of the inner side of the fan frame 1. The fan frame 1 A cover body 9 is connected to the inner left side wall through a support block 8, a fan impeller 10 is arranged inside the cover body 9, a rotating shaft 11 is connected to the axis of the fan impeller 10, the front end of the rotating shaft 11 is connected to the side wall of the support column 2 through a support seat, a driven wheel 12 is arranged on the rotating shaft 11, the driven wheel 12 is connected to the driving wheel 14 at the lower right through a belt 13, a motor 15 is installed at the axis of the driving wheel 14, and the bottom of the motor 15 is connected to the inner right side wall of the fan frame 1 through a support platform 16.

[0024] The driving wheel 14 and the driven wheel 12 are both located in front of the cover body 9 , and the four blocking nets 5 are all embedded in the front and rear ends of the fan frame 1 .

[0025] The first sound absorbing panel 3 and the second sound absorbing panel 4 have the same structure and size.

[0026] The first sound absorbing panel 3 and the second sound absorbing panel 4 are located between the front and rear support columns 2 .

[0027] The cover body 9 is located between the first sound absorbing panel 3 and the second sound absorbing panel 4 .

[0028] The number of the mounting blocks 6 is set to sixteen, and eight mounting blocks 6 are respectively set on the front and rear sides of the fan frame 1 .

[0029] The working principle and use process of the utility model: first, when working, the starting motor 15 drives the driving wheel 14 to rotate, so that the driven wheel 12 is driven to rotate through the belt 13, and the rotating driven wheel 12 drives the rotating shaft 11 to rotate, so that the fan impeller 10 on the rotating shaft 11 rotates;

[0030] By providing the first sound absorbing panel 3 and the second sound absorbing panel 4, it is possible to achieve sound absorption and noise reduction of the noise generated when the fan is working, thereby reducing noise pollution;

[0031] By setting up multiple blocking nets 5, multiple mounting blocks 6, multiple fastening bolts 7 and multiple mounting holes, multiple mounting blocks 6 are installed on the fan frame 1 and the support column 2 by passing the fastening bolts 7 through the mounting holes, so that the air inlet and outlet of the fan can be blocked by the multiple front and rear blocking nets 5, thereby improving the safety during use. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0032] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A novel negative pressure fan, comprising a fan frame (1), characterized in that: A support column (2) is provided at the middle of the front and rear ends of the inner side of the fan frame (1), and a blocking net (5) is provided on the left and right sides of the two support columns (2). Four corners of the four blocking nets (5) facing outward are connected to mounting blocks (6), and mounting holes are provided on the plurality of mounting blocks (6). The plurality of mounting blocks (6) are mounted on the fan frame (1) and the support column (2) by means of fastening bolts (7). The first sound absorbing board (3) and the second sound absorbing board (4) are respectively mounted on the inner top and bottom of the fan frame (1). The inner left wall of the fan frame (1) is provided with a support block. (8) is connected to a cover body (9), a fan wheel (10) is arranged inside the cover body (9), a rotating shaft (11) is connected to the axis of the fan wheel (10), the front end of the rotating shaft (11) is connected to the side wall of the support column (2) through a support seat, a driven wheel (12) is arranged on the rotating shaft (11), the driven wheel (12) is connected to the driving wheel (14) at the lower right through a belt (13), a motor (15) is installed at the axis of the driving wheel (14), and the bottom of the motor (15) is connected to the inner right side wall of the fan frame (1) through a support platform (16).

2. A new type of negative pressure fan according to claim 1, characterized in that: The driving wheel (14) and the driven wheel (12) are both located in front of the cover body (9), and the four blocking nets (5) are all embedded in the front and rear ends of the fan frame (1).

3. A new type of negative pressure fan according to claim 1, characterized in that: The first sound absorbing panel (3) and the second sound absorbing panel (4) have the same structure and size.

4. A new type of negative pressure fan according to claim 1, characterized in that: The first sound absorbing panel (3) and the second sound absorbing panel (4) are located between the front and rear support columns (2).

5. The novel negative pressure fan according to claim 1 is characterized in that: The cover body (9) is located between the first sound absorbing board (3) and the second sound absorbing board (4).

6. A new type of negative pressure fan according to claim 1, characterized in that: The number of the mounting blocks (6) is set to sixteen, and eight mounting blocks (6) are respectively set on the front and rear sides of the fan frame (1).

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