Centrifugal fan with vortex guide structure

Abstract

The utility model belongs to centrifugal fan technical field, concretely relates to a centrifugal fan with scroll guide vane structure. The utility model discloses a centrifugal fan with scroll guide vane structure includes: at least one fan assembly, the fan assembly includes volute and the impeller in volute, the both ends of volute are provided with the air inlet, and the side is provided with the air outlet, motor, the end of motor shaft of motor stretches into the corresponding volute from the air inlet, and is connected with the impeller, and the end cover of motor towards the air inlet is provided with scroll guide vane structure, scroll guide vane structure is used for guiding the radial rotation of the gas at the air inlet. The utility model discloses a centrifugal fan with scroll guide vane structure's impeller and motor shaft direct connection, and the end cover of motor towards the air inlet is provided with scroll guide vane structure, can be axial perpendicular air inlet guide to become rotating air inlet, changes the fluid vector direction of preacceleration area, improves the fan efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal fan technology, specifically relating to a centrifugal fan with a vortex guide structure. Background Technology

[0002] Centrifugal fans operate on the principle of converting kinetic energy into potential energy. They utilize a high-speed rotating impeller to accelerate gas, then decelerate and change its flow direction, converting kinetic energy into potential energy (pressure). Centrifugal fans are classified into forward-curved and backward-curved types. Forward-curved fans are generally used as blowers, while backward-curved fans are used as induced draft fans. The difference lies in the length of the impeller crossbar and the impeller edge. Forward-curved impellers are parallel to the impeller edge, with an impeller outlet angle greater than 90 degrees; they are also called forward-curved impellers and are mostly used for high pressure. Backward-curved impellers are not parallel to the impeller, with a length difference of several centimeters or millimeters from the impeller edge; they are called backward-curved impellers, with an impeller outlet angle less than 90 degrees; they are mainly used for medium pressure.

[0003] Patent CN222376743U discloses a centrifugal fan with open ends for air intake and an open volute for air exhaust. In this type of fan, when gas enters the inlet, the gas flow direction is perpendicular to the exhaust direction. Therefore, the impeller needs to change the gas flow direction from axial to circumferential, resulting in significant power consumption. Utility Model Content

[0004] The purpose of this invention is to provide a centrifugal fan with a vortex guide structure, which can change the flow direction of gas in advance when it enters the air inlet, thereby reducing power consumption.

[0005] This application provides a centrifugal fan with a vortex guide structure, comprising: At least one fan assembly; the fan assembly includes a volute and an impeller located inside the volute; the volute has air inlets at both ends and an air outlet on its side; An electric motor; the end of the motor shaft extends from the air inlet into the corresponding volute and is connected to the impeller; and The motor is provided with a vortex guide structure on the end cover facing the air inlet; the vortex guide structure is used to guide the gas at the air inlet to rotate circumferentially.

[0006] In one embodiment of this application, the vortex guide structure includes a plurality of guide plates disposed on the end cover of the motor.

[0007] In one embodiment of this application, a plurality of the guide vanes are arranged in a circumferential array along the axis of the motor shaft.

[0008] In one embodiment of this application, the guide plate is spirally arranged on the end cover of the motor.

[0009] In one embodiment of this application, a portion of the air deflector is located inside the air inlet.

[0010] In one embodiment of this application, the air deflector is located on the outside of the air inlet.

[0011] In one embodiment of this application, the number of fan assemblies is two, located on both sides of the motor; The motor has vortex guide structures on both end caps.

[0012] In one embodiment of this application, a bearing for supporting the motor shaft is provided inside the end cover of the motor.

[0013] In one embodiment of this application, the vortex guide structure is integrally formed with the end cap.

[0014] In one embodiment of this application, a heat sink is provided on the outer periphery of the motor.

[0015] The beneficial effects of this utility model are: Unlike existing technologies, this application provides a centrifugal fan with a vortex guide structure, comprising: at least one fan assembly; the fan assembly includes a volute and an impeller located within the volute; air inlets are provided at both ends of the volute, and an air outlet is provided on the side; a motor; the end of the motor shaft extends from the air inlet into the corresponding volute and is connected to the impeller; and a vortex guide structure is provided on the end cover of the motor facing the air inlet; the vortex guide structure is used to guide the gas at the air inlet to rotate circumferentially. The impeller of the centrifugal fan with the vortex guide structure of this invention is directly connected to the motor shaft, eliminating the need for a bearing support device at the air inlet and reducing obstruction to the airflow; furthermore, the vortex guide structure on the end cover of the motor facing the air inlet can guide the axial airflow at the air inlet into rotating airflow, changing the fluid vector direction in the pre-acceleration zone and improving the fan efficiency.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a perspective view of a single fan according to a preferred embodiment of the present invention; Figure 2 This is a perspective view of the motor of a single fan according to a preferred embodiment of the present invention; Figure 3 This is a cross-sectional view of a single fan according to a preferred embodiment of the present invention; Figure 4 This is a perspective view of a preferred embodiment of the dual-fan system of this utility model; Figure 5 This is a perspective view of the motor of a dual-fan assembly according to a preferred embodiment of the present invention; Figure 6 This is a cross-sectional view of a preferred embodiment of the present invention, showing a dual-fan system.

[0020] In the picture: Fan assembly 1, volute 11, impeller 12, air inlet 111, air outlet 112; 2. Motor, 21. Motor shaft, 22. End cover, 23. Vortex flow guide structure, 231. Flow guide plate, 24. Bearing, 25. Heat sink. Detailed Implementation

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

[0022] This application provides a centrifugal fan with a vortex guide structure, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0023] See Figures 1 to 6In one embodiment of this application, the centrifugal fan with a vortex guide structure includes: at least one fan assembly 1; the fan assembly 1 includes a volute 11 and an impeller 12 located inside the volute 11; the volute 11 has air inlets 111 at both ends and an air outlet 112 on its side; a motor 2; the end of the motor shaft 21 of the motor 2 extends from the air inlet 111 into the corresponding volute 11 and is connected to the impeller 12; and a vortex guide structure 23 is provided on the end cover 22 of the motor 2 facing the air inlet 111; the vortex guide structure 23 is used to guide the gas at the air inlet 111 to rotate radially.

[0024] Compared to existing technologies, in this embodiment, the impeller 12 of the centrifugal fan is directly connected to the motor shaft 21, eliminating the need for a bearing support device at the air inlet 111 and reducing the air resistance at the air inlet 111. In addition, a vortex guide structure 23 is provided on the end cover 22 of the motor 2 facing the air inlet 111, which can guide the original axial air intake into rotational air intake, changing the fluid vector direction in the pre-acceleration zone and improving the fan efficiency.

[0025] In this embodiment, optionally, see [link to relevant documentation]. Figures 1 to 3 Alternatively, the fan assembly 1 can be installed on one side of the motor, i.e., a single fan; see [link / reference]. Figures 4 to 6 Alternatively, fan assemblies 1 can be installed on both sides of the motor, i.e., dual fans.

[0026] In the case of a single fan, the vortex guide structure 23 can be provided only on the end cover 22 facing the air inlet 111 of the motor 2, and the vortex guide structure 23 can be omitted on the other end cover; in the case of a dual fan, the vortex guide structure 23 can be provided on both end covers 22.

[0027] Optionally, the vortex guide structure 23 includes a plurality of guide plates 231 disposed on the end cover 22 of the motor 2. The number of guide plates 231 can be 1, 2, 3, 4 or more, and can be set according to different application scenarios and motor, impeller models, etc.

[0028] Furthermore, several of the aforementioned guide plates 231 may be arranged in a circular array along the axis of the motor shaft 21.

[0029] Optionally, the vortex guide structure 23 and the end cap 22 are integrally formed. Of course, in some embodiments, the vortex guide structure 23 and the end cap 22 can be detachably connected.

[0030] Optionally, the guide plate 231 is spirally arranged on the end cover 22 of the motor 2. Of course, in some embodiments, the shape, form, size, etc. of the guide plate 231 can be set according to different application scenarios and motor, impeller models, etc.

[0031] Optionally, a portion of the guide vane 231 is located inside the air inlet 111. Of course, in some embodiments, the guide vane 231 is located outside the air inlet 111. Whether the guide vane 231 extends into the air inlet 111 can be configured according to different application scenarios and motor, impeller, etc.

[0032] Optionally, the end cover 22 of the motor 2 is provided with a bearing 24 for supporting the motor shaft 21. It should be noted that, regardless of whether it is a single fan or a dual fan, the end covers 22 on both sides of the motor 2 are provided with bearings 24 for supporting the motor shaft 21. In a single fan, the end cover on the side of the motor 2 away from the air inlet can be flat, while the end cover on the side closer to the air inlet can be elongated. This serves two purposes: firstly, to accommodate the vortex guide structure 23, and secondly, to increase the distance between the two bearings 24, thereby improving the stability of the motor shaft 21 during operation. For a dual fan, both end covers on both sides of the motor 2 can be elongated.

[0033] Optionally, a heat sink 25 is provided on the outer periphery of the motor 2. Furthermore, in this application, the vortex guide structure 23 can also serve as a heat sink for the end cover to reduce the overall temperature of the motor.

[0034] In summary, this invention eliminates the bearing support structure at the air inlet 111 by directly connecting the impeller 12 to the motor shaft 21, thus reducing the air resistance at the air inlet 111. Furthermore, the direct connection of the impeller 12 to the motor 2 eliminates the need for belt-driven transmission structures, improving transmission efficiency and reducing the equipment's footprint. By designing the end cover as an elongated type with its front end protruding from the motor housing, the bearing spacing at both ends can be increased, thereby providing stable and effective support for the impeller 12 and ensuring stable fan operation. The vortex guide structure on the end cover can change the airflow direction, thereby improving the overall operating efficiency of the fan.

[0035] It should be noted that all the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0036] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification.

Claims

1. A centrifugal fan with a vortex guide structure, characterized in that, include: At least one fan assembly; the fan assembly includes a volute and an impeller located inside the volute; the volute has air inlets at both ends and air outlets on its sides; An electric motor; the end of the motor shaft extends from the air inlet into the corresponding volute and is connected to the impeller; and The motor is provided with a vortex guide structure on the end cover facing the air inlet; the vortex guide structure is used to guide the gas at the air inlet to rotate radially.

2. The centrifugal fan according to claim 1, characterized in that, The vortex guide structure includes several guide plates disposed on the end cover of the motor.

3. The centrifugal fan according to claim 2, characterized in that, Several of the aforementioned guide vanes are arranged in a circular array along the axis of the motor shaft.

4. The centrifugal fan according to claim 2, characterized in that, The guide plate is spirally arranged on the end cover of the motor.

5. The centrifugal fan according to claim 2, characterized in that, Part of the air deflector is located inside the air inlet.

6. The centrifugal fan according to claim 2, characterized in that, The air deflector is located on the outside of the air inlet.

7. The centrifugal fan according to claim 1, characterized in that, The number of fan components is two, located on both sides of the motor; The motor has vortex guide structures on both end caps.

8. The centrifugal fan according to claim 1, characterized in that, The motor end cover is equipped with a bearing for supporting the motor shaft.

9. The centrifugal fan according to claim 1, characterized in that, The vortex guide structure is integrally formed with the end cap.

10. The centrifugal fan according to claim 1, characterized in that, The motor is provided with heat sinks on its outer periphery.

Images