Pipeline type double-layer silent fan

Abstract

The utility model relates to the technical field of gas conveying equipment, in particular to a pipeline type double-layer silent fan. Comprising a pipeline air inlet, silencing cotton, a multi-blade impeller, a square box body, an inner silencing hole barrel body, a motor main body, a motor ventilation hole, a motor barrel, an air outlet, a fixing frame, a bottom frame fixing nut, a hinge fixing nut, a hinge main body, a motor rear cover plate, a motor fixing plate and a protection plate. A square box is adopted outside, the silencing effect is improved through a device body, fixing frames are arranged on the four edges of the square box in a threaded assembly mode through underframe fixing nuts, hinge bodies are arranged on the surface of the square box in a threaded assembly mode through hinge fixing nuts, and the interior of one end of the square box and a motor rear cover plate are arranged in a threaded assembly mode through external studs. By means of the arrangement, a device body which is small in fan noise, small in size and convenient to install and limit is formed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas conveying equipment, in particular to a pipeline type double-layer silent fan. Background Technique

[0002] Taking the fan equipment applied to ventilation, air change or kitchen oil fume exhaust as an example, generally, the civil centrifugal fans on the market at present have the phenomena of large volume and high noise. To reduce the noise, the centrifugal fan is installed in a box. Although the noise of the fan can be reduced, the volume of the fan will be even larger.

[0003] In urban kitchens or rooms, the space is limited, and it is difficult to find a suitable site space for installation. Generally, the fans have problems of high noise, large volume and inconvenient installation and positioning. It is very difficult for the commonly used centrifugal fans on the market to solve the above situations. Therefore, a pipeline type double-layer silent fan is proposed for the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pipeline type double-layer silent fan, which is used to solve the problems of high noise, large volume and inconvenient installation and positioning of the fan.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A pipeline type double-layer silent fan, including a pipeline air inlet, sound-absorbing cotton, a multi-wing impeller, a square box body, an inner sound-absorbing hole cylinder body, a motor main body, a motor ventilation hole, a motor cylinder, an air outlet, a fixing frame, a bottom frame fixing nut, a hinge fixing nut, a hinge main body, a motor rear cover plate, a motor fixing plate and a guard plate. The left end of the square box body is fixedly communicated with a pipeline air inlet. The inner wall of the square box body is fixedly provided with sound-absorbing cotton. The inner wall of the sound-absorbing cotton is fixedly provided with an inner sound-absorbing hole cylinder body. The inside of the inner sound-absorbing hole cylinder body is fixedly provided with a motor cylinder. The inside of the motor cylinder is fixedly provided with a motor main body. The front end of the motor main body is provided with a motor ventilation hole. The left end of the motor main body is fixedly communicated with a multi-wing impeller. The right end of the square box body is fixedly communicated with an air outlet. The four sides of the square box body are threadedly assembled with fixing frames through bottom frame fixing nuts. The surface of the square box body is threadedly assembled with a hinge main body through a hinge fixing nut. One end inside the square box body is threadedly assembled with a motor rear cover plate through an external stud. One end of the motor main body is threadedly assembled with a motor fixing plate through an external stud. One end inside the square box body is threadedly assembled with a guard plate through an external stud. The guard plate is in contact and fit with the motor fixing plate.

[0007] Preferably, the multi-wing impeller is a multi-wing blade structure, adopts a straight-inlet and straight-outlet structure, the duct air inlet and air outlet are on the same axis, so that the angle between the airflow direction and the linear velocity direction of the blade is an obtuse angle, and the impeller is coaxially arranged with the center line of the circular inner silencer hole cylinder.

[0008] Preferably, the multi-blade impeller changes the blade distribution angle so that the airflow has both partial axial flow and partial centrifugal effect after entering the fan, so its performance is between that of an axial flow fan and a centrifugal fan.

[0009] Preferably, the motor body adopts an inner rotor motor, which is installed inside the motor barrel, and a separate pipeline is arranged to be fixedly connected with the motor ventilation hole to form a circulating heat dissipation pipeline structure, so that the internal rotor assembly of the motor body does not contact the conveying gas.

[0010] Preferably, the driving shaft of the motor body is directly assembled with the shaft end of the fan impeller of the multi-blade impeller through a flange coupling.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, the device adopts a double-layer silencer structure, in which the interior adopts a combination of an inner silencer hole cylinder and silencer cotton, and the exterior adopts a square box body. The device body improves the silencer effect, the blades of the multi-wing impeller adopt backward curved steel blades, which are processed and polished by high-quality steel plates, and the surface of the blades forms a curved structure with smooth edges. The four sides of the square box body are provided with a fixing frame through a bottom frame fixing nut thread assembly, and the surface of the square box body is provided with a hinge body through a hinge fixing nut thread assembly. The interior of one end of the square box body is threadedly assembled with the motor rear cover plate through an external stud, and one end of the motor body is threadedly assembled with the motor fixing plate through an external stud. The interior of one end of the square box body is threadedly assembled with a guard plate through an external stud, and the guard plate is in contact with the motor fixing plate to form a combination method that is easy to disassemble and assemble. Through the above arrangement, a device body with low fan noise, small size and easy installation and limiting is formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal components of the square box of the utility model;

[0015] Figure 3 This is a schematic diagram of the installation of the motor body of the device of the utility model in the normal rotation direction;

[0016] Figure 4 For this utility model Figure 3 Schematic diagram of the motor body installation with the square box rotated 90 degrees counterclockwise;

[0017] Figure 5 For the present utility model Figure 4 Schematic diagram of the installation of the motor main body rotated counterclockwise by 90 degrees in the square box body;

[0018] Figure 6 Schematic diagram of the position of the motor main body in the normal rotation direction of the device of the present utility model;

[0019] Figure 7 For the present utility model Figure 6 Schematic diagram of the installation of the square box body, the motor main body and the motor rear cover plate rotated counterclockwise by 90 degrees;

[0020] Figure 8 For the present utility model Figure 6 Schematic diagram of the bolt connection structure using the motor fixing plate in the present utility model;

[0021] Figure 9 For the present utility model Figure 7 Schematic diagram of the bolt connection structure using the motor fixing plate in the present utility model.

[0022] In the figure: 1. Pipeline air inlet; 2. Sound-absorbing cotton; 3. Multi-wing impeller; 4. Square box body; 5. Inner sound-absorbing hole cylinder body; 6. Motor main body; 7. Motor ventilation hole; 8. Motor cylinder; 9. Air outlet; 10. Fixed frame; 11. Bottom frame fixing nut; 12. Hinge fixing nut; 13. Hinge main body; 14. Motor rear cover plate; 15. Motor fixing plate; 16. Protective plate. Specific embodiments

[0023] 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.

[0024] In the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the position or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Similarly, words such as "a", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "comprising" or "including" mean that the element or object appearing before the word encompasses the element or object listed after the word and its equivalents, without excluding other elements or objects.

[0025] In addition, in the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Please refer to Figures 1-9 , the present utility model provides a technical solution:

[0027] A pipeline - type double - layer silent fan, comprising a pipeline air inlet 1, sound - absorbing cotton 2, a multi - wing impeller 3, a square box body 4, an inner sound - absorbing hole cylinder body 5, a motor main body 6, a motor ventilation hole 7, a motor cylinder 8, an air outlet 9, a fixing frame 10, a base fixing nut 11, a hinge fixing nut 12, a hinge body 13, a motor rear cover plate 14, a motor fixing plate 15 and a guard plate 16. The left end of the square box body 4 is fixedly communicated with the pipeline air inlet 1. The inner wall of the square box body 4 is fixedly provided with the sound - absorbing cotton 2. The inner wall of the sound - absorbing cotton 2 is fixedly provided with the inner sound - absorbing hole cylinder body 5. The inside of the inner sound - absorbing hole cylinder body 5 is fixedly provided with the motor cylinder 8. The inside of the motor cylinder 8 is fixedly provided with the motor main body 6. The front end of the motor main body 6 is provided with the motor ventilation hole 7. The left end of the motor main body 6 is fixedly communicated with the multi - wing impeller 3. The right end of the square box body 4 is fixedly communicated with the air outlet 9. The four sides of the square box body 4 are threadedly assembled with the fixing frame 10 through the base fixing nut 11. The surface of the square box body 4 is threadedly assembled with the hinge body 13 through the hinge fixing nut 12. The inside of one end of the square box body 4 is threadedly assembled with the motor rear cover plate 14 through an external stud. One end of the motor main body 6 is threadedly assembled with the motor fixing plate 15 through an external stud. The inside of one end of the square box body 4 is threadedly assembled with the guard plate 16 through an external stud. The guard plate 16 is in contact and fit with the motor fixing plate 15.

[0028] The multi - wing impeller 3 is of a multi - wing blade structure, adopting a straight - in and straight - out air structure. The pipeline air inlet 1 and the air outlet 9 are on the same axis, so that the included angle between the air flow direction and the linear velocity direction of the blade is an obtuse angle. The impeller is coaxially arranged with the center line of the circular inner sound - absorbing hole cylinder body 5. Through the above settings, a blade distribution method with less air resistance is formed.

[0029] By changing the blade distribution angle of the multi - wing impeller 3, after the air flow enters the fan, it has both partial axial - flow action and partial centrifugal action. Therefore, its performance is between that of an axial - flow fan and a centrifugal fan. Through the above settings, by changing the blade distribution angle of the multi - wing impeller 3, the included angle between the air flow direction and the linear velocity direction of the blade is an obtuse angle, so that after the air flow enters the fan, the air flow has axial - flow and centrifugal effects.

[0030] The motor main body 6 adopts an inner - rotor motor, which is installed inside the motor cylinder 8. A separate pipeline is fixedly communicated with the motor ventilation hole 7 to form a circulating heat - dissipation pipeline structure, so that the internal rotor assembly of the motor main body 6 does not contact the conveyed gas. Through the above settings, the quality of the motor is prevented from being affected by harmful substances in the conveyed gas.

[0031] The drive shaft of the motor main body 6 is directly connected and assembled with the fan impeller shaft end of the multi - wing impeller 3 through a flange coupling. Through the above settings, a direct - connection drive structure between the motor main body 6 and the multi - wing impeller 3 is formed.

[0032] Workflow: The present utility model provides a low-noise duct-type double-layer silent fan suitable for ventilation, air change or kitchen fume exhaust, forming a device body with low fan noise, small volume and convenient installation and positioning.

[0033] This device adopts a double-layer sound insulation structure. Inside, it combines an inner sound insulation hole cylinder body 5 and sound insulation cotton 2. Outside, it uses a square box body 4. The device body improves the sound insulation effect. The blades of the multi-wing impeller 3 are backward-curved steel blades, processed and polished from high-quality steel plates. The outer surface of the blades forms a smooth-edge curve structure. The sectional angle and arc of the blades are simulated by the flow field of CFD simulation software, making the impeller have the characteristics of high efficiency, low noise and a wide stable performance area.

[0034] Among them, the motor main body 6 is directly connected and assembled with the multi-wing impeller 3 and is directly driven by the motor main body 6. The blades of the multi-wing impeller 3 are distributed through dynamic balancing to reach the G4.0 balance grade. The whole is analyzed by FEA finite element analysis, and reinforcing ribs are accurately selected at points. After repeated test verification, the reliability of long-term operation is ensured, and stable air flow and low noise can be maintained after reaching the limit speed.

[0035] The motor main body 6 is installed in the motor cylinder 8, and a separate pipeline is fixedly connected to the motor ventilation hole 7 to form a circulating heat dissipation pipeline structure, so that the internal rotor assembly of the motor main body 6 does not contact the transported gas, avoiding the influence of harmful substances in the transported gas on the motor quality and greatly improving the service life of the motor main body 6.

[0036] The motor main body 6 drives the blades of the multi-wing impeller 3 to rotate, introduces air from the pipeline air inlet 1 and sends it out from the air outlet 9. The main body of the inner sound insulation hole cylinder body 5 is made of porous foam metal with good sound absorption. The device body uses the provided sound insulation cotton 2 and the inner sound insulation hole cylinder body 5 to reduce the noise of air circulation.

[0037] Fixing brackets 10 are threadedly assembled at the four sides of the square box body 4 through the chassis fixing nuts 11. The hinge main body 13 is threadedly assembled on the surface of the square box body 4 through the hinge fixing nuts 12. One end inside the square box body 4 is threadedly assembled with the motor rear cover plate 14 through an external stud. One end of the motor main body 6 is threadedly assembled with the motor fixing plate 15 through an external stud. One end inside the square box body 4 is threadedly assembled with the guard plate 16 through an external stud. The guard plate 16 abuts and fits against the motor fixing plate 15, forming a convenient disassembly and assembly combination.

[0038] As Figures 1-9 shown, this device provides different installation methods for various fan devices at different angles, suitable for installation and positioning in different spaces, making the overall installation more convenient.

[0039] Although embodiments of the present utility model 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 principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A duct type double-layer silent fan, comprising a duct air inlet (1), a silencer (2), a multi-wing impeller (3), a square box (4), an inner silencer hole cylinder (5), a motor body (6), a motor ventilation hole (7), a motor cylinder (8), an air outlet (9), a fixing frame (10), a bottom frame fixing nut (11), a hinge fixing nut (12), a hinge body (13), a motor rear cover plate (14), a motor fixing plate (15) and a guard plate (16), characterized in that: The left end of the square box (4) is fixedly connected to a duct air inlet (1); a sound-absorbing cotton (2) is fixedly arranged on the inner wall of the square box (4); an inner sound-absorbing hole cylinder (5) is fixedly arranged on the inner wall of the sound-absorbing cotton (2); a motor cylinder (8) is fixedly arranged inside the inner sound-absorbing hole cylinder (5); a motor body (6) is fixedly arranged inside the motor cylinder (8); a motor ventilation hole (7) is opened at the front end of the motor body (6); the left end of the motor body (6) is fixedly connected to a multi-wing impeller (3); the right end of the square box (4) is fixedly connected to an air outlet (9); the square box (4) ) is threadedly assembled with a fixing frame (10) at the four sides of the square box (4) through a bottom frame fixing nut (11), a hinge body (13) is threadedly assembled with a hinge fixing nut (12) on the surface of the square box (4), one end of the square box (4) is threadedly assembled with a motor rear cover (14) through an external stud, one end of the motor body (6) is threadedly assembled with a motor fixing plate (15) through an external stud, and one end of the square box (4) is threadedly assembled with a guard plate (16) through an external stud, and the guard plate (16) is in contact with and fits the motor fixing plate (15).

2. According to claim 1, a ducted double-layer silent fan is characterized in that: The multi-wing impeller (3) is a multi-wing blade structure, adopting a straight air inlet and straight air outlet structure, the duct air inlet (1) and the air outlet (9) are on the same axis, so that the angle between the airflow direction and the linear velocity direction of the blades is an obtuse angle, and the impeller is coaxially arranged with the center line of the circular inner silencer hole cylinder (5).

3. According to claim 2, a ducted double-layer silent fan is characterized in that: The multi-blade impeller (3) changes the blade distribution angle so that after the airflow enters the fan, it has both a partial axial flow effect and a partial centrifugal effect, so its performance is between that of an axial flow fan and a centrifugal fan.

4. According to claim 1, a ducted double-layer silent fan is characterized in that: The motor body (6) adopts an inner rotor motor, which is installed inside the motor barrel (8), and a separate pipeline is provided to be fixedly connected with the motor ventilation hole (7) to form a circulating heat dissipation pipeline structure, so that the internal rotor component of the motor body (6) does not contact the conveying gas.

5. According to claim 1, a ducted double-layer silent fan is characterized in that: The drive shaft of the motor body (6) is directly connected and assembled with the fan impeller shaft end of the multi-blade impeller (3) via a flange coupling.

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