Multi-blade centrifugal fan

Abstract

The utility model discloses a multi-blade type centrifugal fan which comprises a fixing base used for supporting, a servo motor fixedly installed at the right end of the fixing base, a centrifugal fan body fixedly installed on the left side of the fixing base and a dustproof net, and the dustproof net is installed at an air inlet in the front side of the centrifugal fan body in a clamped mode. The dustproof net is arranged on the front side of the centrifugal fan body and forms a detachable structure on the front side of the centrifugal fan body through a limiting mechanism, and the air outlet cover is connected with the air outlet pipe through a corrugated pipe. According to the multi-blade type centrifugal fan, external foreign matter can be prevented from entering the centrifugal fan body to influence rotation of the impeller through the arrangement of the dustproof net, the dustproof net can be conveniently detached and cleaned in combination with the arrangement of the limiting mechanism, the dustproof net is prevented from being blocked by the foreign matter, and air inlet smoothness is kept; and the angle of the air outlet cover can be conveniently adjusted, and the air outlet direction can be adjusted according to actual use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field related to centrifugal fans, in particular to a multi-blade centrifugal fan. Background Art

[0002] Centrifugal fans are machines that use the principle of converting kinetic energy into potential energy, using a high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction, so that the kinetic energy is converted into potential energy. They rely on the input mechanical energy to increase the gas pressure and discharge the gas. They can be used for ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings, and are widely used.

[0003] With reference to Chinese patent authorization announcement number CN213655206U, the authorization announcement date is 2021.07.09, which discloses a multi-blade high-temperature centrifugal fan, which includes a base, a motor and a fan are installed on the top of the base, an impeller is installed inside the fan, an air inlet end of the fan is fixedly connected to a fixed plate, and there are multiple fixed plates, a damping shaft is installed at the connection of the fixed plate, and a movable plate corresponding to the position of the fixed plate is fixedly connected to the outer wall of the damping shaft, which can rotate the angle of the movable plate along the damping shaft. In the normal fully open state, the movable plate is rotated along the damping shaft so that the movable plate is all attached to the surface of the fixed plate. At this time, the air inlet end of the fan is relatively large. When adjusting the air volume of the fan, the angle of the movable plate is adjusted as the damping shaft rotates, so that the movable plate moves to the opening position between the fixed plates, thereby reducing the air inlet end area, so as to achieve the purpose of controlling the air volume, and the use is flexible and the adjustment is convenient;

[0004] However, in the prior art, foreign matter from the outside easily enters the fan through the air inlet during use, affecting the rotation of the impeller, and the angle of the fan outlet is usually fixed, which makes it inconvenient to adjust the fan outlet angle according to actual use requirements. For example, the comparative patents listed above have this problem.

[0005] For this reason, we propose a multi-blade centrifugal fan to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a multi-blade centrifugal fan to solve the problem raised in the above background technology that foreign matter from the outside can easily enter the fan through the air inlet and affect the rotation of the impeller, and the angle of the fan air outlet is usually fixed, which makes it inconvenient to adjust the air outlet angle of the fan according to actual use requirements.

[0007] To achieve the above object, the utility model provides the following technical solution: a multi-blade centrifugal fan, comprising a fixing seat for support, a servo motor fixedly mounted on the right end of the fixing seat, and a centrifugal fan body fixedly mounted on the left side of the fixing seat;

[0008] Wherein, the servo motor drives the impeller to rotate in the centrifugal fan body through a belt and a pulley;

[0009] Also includes:

[0010] A dustproof net, which is mounted on the air inlet on the front side of the centrifugal fan body, and the dustproof net forms a disassembly structure on the front side of the centrifugal fan body through a limiting mechanism;

[0011] An air outlet hood, wherein the air outlet hood is connected to the air outlet pipe through a corrugated pipe, and a movable sleeve is fixedly connected to the upper end of the air outlet hood, and the air outlet hood forms a flip structure on the left side of the air outlet pipe through the movable sleeve and the support frame;

[0012] At the same time, the air outlet pipe is fixedly installed at the lower left end of the centrifugal fan body.

[0013] Preferably, the limiting mechanism is arranged at an equal angle at the edge of the front side of the centrifugal fan body, and the limiting mechanism consists of a fixed plate hingedly connected to the front side of the centrifugal fan body, a fixed column for positioning, a fixed rod with a limiting function, and a first spring sleeved on the outer surface of the fixed rod.

[0014] Preferably, the fixing plate is snap-connected with the fixing column, the fixing column is fixedly connected to the front side of the centrifugal fan body, and the fixing column is through-connected with the dust screen.

[0015] Preferably, both left and right sides of the fixing plate are slidably connected with fixing rods, and the fixing rods are snap-fittedly connected to the fixing columns, and the fixing plate is fittedly arranged on the front side of the dustproof net.

[0016] Preferably, a sliding structure is formed between the movable sleeve and the support frame, and the support frame is fixedly connected to the upper end of the air outlet pipe, and a second spring is arranged in the middle of the support frame.

[0017] Preferably, the movable end of the second spring is fixedly connected to a movable block, and both ends of the upper end of the movable block are slidably connected to connecting blocks, and the connecting blocks are fixedly connected to the support frame.

[0018] Preferably, a fixing pin is fixedly connected to the left side of the movable block, and the fixing pin is snap-connected to a fixing groove at a corresponding position, and the fixing groove is arranged at an equal angle on the inner side of the movable sleeve.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: in actual use, the multi-blade centrifugal fan can prevent foreign objects from entering the centrifugal fan body and affecting the rotation of the impeller through the provision of the dustproof net, and in combination with the provision of the limit mechanism, it is convenient to disassemble and clean the dustproof net to prevent the dustproof net from being blocked by foreign objects, thereby maintaining the smoothness of the air intake, and in combination with the provision of the movable sleeve and the support frame, it is convenient to adjust the angle of the air outlet cover, and the air outlet direction can be adjusted according to actual use requirements;

[0020] 1. A dust-proof net and a limit mechanism are provided. The dust-proof net can prevent foreign matter from entering the centrifugal fan body and affecting the rotation of the impeller. Combined with the setting of the limit mechanism, the dust-proof net can be easily disassembled and cleaned to prevent the dust-proof net from being blocked;

[0021] 2. A movable sleeve and a support frame are provided. By sliding between the movable sleeve and the support frame, the angle of the air outlet cover can be adjusted to achieve the adjustment of the air outlet direction;

[0022] 3. A connecting block and a fixing pin are provided. By sliding between the movable block and the connecting block, the movable block drives the fixing pin to engage in the fixing groove at the corresponding position, thereby facilitating the limiting of the movable sleeve and the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the front view cutaway structure of the utility model;

[0024] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0025] Figure 3 This is a schematic diagram of a half-section structure of the connection between the fixed column and the dustproof net of the utility model;

[0026] Figure 4 This is a schematic diagram of the overall structure of the fixed plate, fixed column and fixed rod connected in the utility model;

[0027] Figure 5 This is a front view structural diagram of the centrifugal fan body, fixed column, air outlet pipe and impeller connection of the utility model;

[0028] Figure 6 This is a schematic diagram of the front view and section structure of the connection between the movable sleeve, the support frame and the movable block of the utility model;

[0029] Figure 7 This is a schematic diagram of the overall structure of the movable block, the connecting block and the fixing pin of the utility model;

[0030] Figure 8It is a schematic diagram of the top view and section structure of the movable sleeve, the support frame, the fixing pin and the fixing groove of the utility model.

[0031] In the figure: 1. fixing seat; 2. servo motor; 3. centrifugal fan body; 4. dust screen; 5. limit mechanism; 6. fixing plate; 7. fixing column; 8. fixing rod; 9. first spring; 10. air outlet pipe; 11. air outlet cover; 12. movable sleeve; 13. support frame; 14. second spring; 15. movable block; 16. connecting block; 17. fixing pin; 18. fixing slot. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-8 The utility model provides a technical solution: a multi-blade centrifugal fan, including a fixing seat 1, a servo motor 2, a centrifugal fan body 3, a dust screen 4, a limiting mechanism 5, a fixing plate 6, a fixing column 7, a fixing rod 8, a first spring 9, an air outlet pipe 10, an air outlet cover 11, a movable sleeve 12, a support frame 13, a second spring 14, a movable block 15, a connecting block 16, a fixing pin 17 and a fixing groove 18.

[0034] When using the multi-blade centrifugal fan, Figure 1 and Figure 5 As shown, a servo motor 2 is fixedly installed on the upper right end of the fixing seat 1, and a centrifugal fan body 3 is fixedly installed on the upper left end of the fixing seat 1. The servo motor 2 drives the impeller inside the centrifugal fan body 3 to rotate through a belt and a pulley. At the same time, the dustproof net 4 is snap-fitted and installed at the air inlet on the front side of the centrifugal fan body 3, which can effectively prevent external foreign matter from entering the centrifugal fan body 3 through the air inlet and affecting the rotation of the impeller. In addition, during use, combined with Figure 6 , Figure 7 and Figure 8 As shown, the air outlet cover 11 is connected to the air outlet pipe 10 through a bellows, and the upper end of the air outlet cover 11 is fixedly connected. According to the actual air outlet demand, by pulling the movable block 15, the movable block 15 slides with the connecting block 16, and the movable block 15 squeezes the second spring 14, so that the second spring 14 undergoes elastic deformation;

[0035] The movable block 15 drives the fixing pin 17 to disengage from the fixing slot 18, thereby releasing the limit between the movable sleeve 12 and the support frame 13. At the same time, the fixing slot 18 is set at an equal angle on the inner side of the movable sleeve 12. Then, by turning over the air outlet cover 11, the air outlet cover 11 drives the movable sleeve 12 to slide between the support frame 13, so as to facilitate the adjustment of the air outlet direction of the air outlet cover 11 according to actual use requirements. When the angle adjustment is completed, the movable block 15 is directly released. At this time, the second spring 14 restores its elastic deformation, driving the movable block 15 to slide between the connecting block 16, so that the movable block 15 drives the fixing pin 17 to engage in the fixing slot 18 at the corresponding position, so as to limit the position between the movable sleeve 12 and the support frame 13.

[0036] In addition, when you are finished using it, turn off the power and Figure 2 , Figure 3 and Figure 4 As shown, the limiting mechanism 5 is arranged at an equal angle at the edge of the dustproof net 4, and the limiting mechanism 5 is composed of a fixing plate 6 hingedly connected to the front side of the centrifugal fan body 3, a fixing column 7 for positioning, a fixing rod 8 with a limiting function and a first spring 9 sleeved on the outer surface of the fixing rod 8. The fixing rod 8 can be pulled to slide between the fixing rod 8 and the fixing plate 6, and the fixing rod 8 squeezes the first spring 9, so that the first spring 9 is elastically deformed, and the fixing rod 8 is disengaged from the fixing column 7, thereby releasing the limiting between the fixing column 7 and the fixing plate 6, and then the fixing plate 6 is flipped and the fixing plate 6 is rotated on the front side of the centrifugal fan body 3, and the fixing plate 6 is disengaged from the fixing column 7, thereby releasing the limiting between the dustproof net 4 and the centrifugal fan body 3, and then the dustproof net 4 is pulled to be disengaged from the fixing column 7, so that the dustproof net 4 is easy to disassemble and clean, and the dustproof net 4 is prevented from being blocked during long-term use.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-blade centrifugal fan, comprising a fixing base (1) for supporting, a servo motor (2) fixedly mounted on the right end of the fixing base (1), and a centrifugal fan body (3) fixedly mounted on the left side of the fixing base (1); in, The servo motor (2) drives the impeller to rotate in the centrifugal fan body (3) via a belt and a pulley; It is characterized by further comprising: A dustproof net (4), the dustproof net (4) being mounted on the air inlet on the front side of the centrifugal fan body (3), and the dustproof net (4) forming a disassembly structure on the front side of the centrifugal fan body (3) through a limiting mechanism (5); An air outlet cover (11), wherein the air outlet cover (11) is connected to the air outlet pipe (10) via a corrugated pipe, and a movable sleeve (12) is fixedly connected to the upper end of the air outlet cover (11), and the air outlet cover (11) forms a flip structure on the left side of the air outlet pipe (10) via the movable sleeve (12) and the support frame (13); At the same time, the air outlet pipe (10) is fixedly installed at the lower left end of the centrifugal fan body (3).

2. A multi-blade centrifugal fan according to claim 1, characterized in that: The limiting mechanism (5) is arranged at an equal angle at the edge of the front side of the centrifugal fan body (3), and the limiting mechanism (5) is composed of a fixing plate (6) hingedly connected to the front side of the centrifugal fan body (3), a fixing column (7) for positioning, a fixing rod (8) with a limiting function, and a first spring (9) sleeved on the outer surface of the fixing rod (8).

3. A multi-blade centrifugal fan according to claim 2, characterized in that: The fixing plate (6) is snap-connected to the fixing column (7), the fixing column (7) is fixedly connected to the front side of the centrifugal fan body (3), and the fixing column (7) is through-connected to the dustproof net (4).

4. A multi-blade centrifugal fan according to claim 3, characterized in that: The left and right sides of the fixing plate (6) are both slidably connected with fixing rods (8), and the fixing rods (8) are snap-fitted and connected to the fixing columns (7), and the fixing plate (6) is arranged in close contact with the front side of the dustproof net (4).

5. The multi-blade centrifugal fan according to claim 1, characterized in that: A sliding structure is formed between the movable sleeve (12) and the support frame (13), and the support frame (13) is fixedly connected to the upper end of the air outlet pipe (10), and a second spring (14) is arranged in the middle of the support frame (13).

6. A multi-blade centrifugal fan according to claim 5, characterized in that: The movable end of the second spring (14) is fixedly connected to a movable block (15), and both ends of the upper end of the movable block (15) are slidably connected to connecting blocks (16), and the connecting blocks (16) are fixedly connected to the support frame (13).

7. A multi-blade centrifugal fan according to claim 6, characterized in that: A fixing pin (17) is fixedly connected to the left side of the movable block (15), and the fixing pin (17) is snap-connected to a fixing groove (18) at a corresponding position, and the fixing groove (18) is arranged at an equal angle on the inner side of the movable sleeve (12).

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