Alternating current backward centrifugal fan
Patent Information
- Application Number
- CN202522558438.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-12-02
AI Technical Summary
[0003]现有的后向式离心风机在使用时，离心扇轮旋转边缘与风机外壳之间会存在一定缝隙，使得离心扇轮旋转时排出的空气会从缝隙露出，影响风机的运行稳定，同时，现有的离心风机在运行时，导风叶片上缺少对空气进行导风处理的结构，从导风叶片上流过的空气进入风机壳内后容易形成乱流，影响风机的出风效率
1、该实用新型通过设置的环向毛刷和离心扇轮，使得离心扇轮外环侧的环向毛刷可以与风机外壳之间的缝隙被阻挡，避免空气从缝隙露出，保证风机的运行稳定；
Smart Images
Figure CN224835525U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of centrifugal fan technology, specifically to an AC backward centrifugal fan. Background Technology
[0002] Backward-curved centrifugal fans are fluid machines that use backward-curved impellers. They achieve high efficiency and low noise through aerodynamic optimization and are mainly used in industrial ventilation, air conditioning systems, and heat dissipation for precision equipment.
[0003] When existing backward-curved centrifugal fans are in use, there is a certain gap between the rotating edge of the centrifugal impeller and the fan casing. This allows the air discharged when the centrifugal impeller rotates to leak out through the gap, affecting the stable operation of the fan. At the same time, existing centrifugal fans lack a structure on the guide vanes to guide the air. The air flowing through the guide vanes easily forms turbulence after entering the fan casing, affecting the fan's air output efficiency. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide an AC backward centrifugal fan. By setting an circumferential brush and a centrifugal fan wheel, the circumferential brush on the outer ring side of the centrifugal fan wheel can block the gap between it and the fan casing, preventing air from leaking out of the gap and ensuring the stable operation of the fan. This can effectively solve the problems in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an AC backward centrifugal fan, including a centrifugal fan wheel, with guide vanes arranged circumferentially on the inner side of the centrifugal fan wheel, guide ribs arranged on the side of the guide vanes, a circumferential brush arranged on the outer side of the centrifugal fan wheel, a support frame formed at the center of the centrifugal fan wheel, and a heat dissipation groove arranged circumferentially on the side of the support frame.
[0006] Furthermore, a motor slot is provided on the inner side of the support frame, a motor is provided in the motor slot, and a rotating shaft is provided at the output end of the motor.
[0007] Furthermore, an air inlet is provided at the center opening of the centrifugal fan wheel, and the air guide blades are separated into air guide chambers.
[0008] Furthermore, the support frame has a shaft groove corresponding to the position of the rotating shaft, and the rotating shaft is connected to the shaft groove by bolts.
[0009] Furthermore, the air guide blades and the centrifugal fan wheel are integrally formed, and the air guide ribs are integrally formed with the air guide blades.
[0010] Furthermore, the circumferential brush is bonded to the centrifugal fan wheel.
[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through the setting of circumferential brushes and centrifugal fan wheels, allows the circumferential brushes on the outer ring side of the centrifugal fan wheel to block the gap between the brushes and the fan casing, preventing air from leaking out of the gap and ensuring the stable operation of the fan. 2. This utility model, through the setting of air guide vanes and air guide ribs, enables the air flowing over the air guide vanes to be effectively guided and processed by the air guide ribs, so that the flowing air smoothly enters the fan casing, avoids turbulence, and ensures the air output efficiency of the fan. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 Schematic diagram of the main cross-sectional structure of the centrifugal fan impeller; Figure 3 This utility model Figure 1 A side sectional view of the centrifugal fan impeller. Figure 4 This utility model Figure 1 A schematic diagram of the main structure of the centrifugal fan impeller.
[0013] In the diagram: 1. Support frame; 2. Centrifugal fan wheel; 3. Air guide cavity; 4. Air guide blades; 5. Heat dissipation groove; 6. Air inlet; 7. Rotating shaft; 8. Air guide rib; 9. Motor slot; 10. Shaft slot; 11. Motor; 12. Circumferential brush. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] Please see Figure 1-4 This embodiment provides a technical solution: an AC backward centrifugal fan, including a centrifugal fan wheel 2, with guide vanes 4 arranged circumferentially on the inner side of the centrifugal fan wheel 2, guide ribs 8 arranged on the side of the guide vanes 4, a circumferential brush 12 arranged on the outer circumferential side of the centrifugal fan wheel 2, a support frame 1 formed in the center of the centrifugal fan wheel 2, and a heat dissipation groove 5 arranged circumferentially on the side of the support frame 1.
[0016] like Figure 1-4As shown, during use, the centrifugal fan wheel 2 is installed inside the fan housing. The motor 11 is inserted into the shaft groove 10 through the rotating shaft 7, and the rotating shaft 7 is fixedly connected to the shaft groove 10 by bolts. The motor 11 drives the rotating shaft 7 to rotate rapidly, which in turn causes the centrifugal fan wheel 2 to rotate rapidly. External air enters through the air inlet 6, and after passing through the air guide vanes 4 and air guide ribs 8, the air flows through the air guide cavity 3 and enters the fan housing. It is then discharged through the air outlet on the fan housing. The circumferential brush 12 fills the gap between the centrifugal fan wheel 2 and the rotating position of the fan housing, preventing air from leaking out of the gap and ensuring the air output effect of the centrifugal fan.
[0017] A motor slot 9 is provided on the inner side of the support frame 1, and a motor 11 is provided in the motor slot 9. A rotating shaft 7 is provided at the output end of the motor 11. The rotation of the rotating shaft 7 can drive the support frame 1 and the centrifugal fan wheel 2 to rotate as a whole, so that air enters the air guide cavity 3 through the air inlet 6, and enters the fan casing under the guidance of the air guide ribs 8 and the air guide blades 4.
[0018] An air inlet 6 is provided at the center opening of the centrifugal fan wheel 2, and the air guide blades 4 are separated into air guide chambers 3.
[0019] The support frame 1 has a shaft groove 10 at the position corresponding to the rotating shaft 7. The rotating shaft 7 is connected to the shaft groove 10 by bolts. The fixed connection between the rotating shaft 7 and the shaft groove 10 ensures that the rotating shaft 7 can drive the support frame 1 and the centrifugal fan wheel 2 to rotate stably.
[0020] The air guide blade 4 and the centrifugal fan wheel 2 are integrally formed, and the air guide rib 8 and the air guide blade 4 are integrally formed. The air guide rib 8 can guide the air flowing through the air guide cavity 3 to ensure that the air can be discharged quickly and smoothly, thereby ensuring the overall air output effect of the fan.
[0021] The circumferential brush 12 is bonded to the centrifugal fan wheel 2.
[0022] The working principle of the AC backward centrifugal fan provided by this utility model is as follows: Figures 1-4 As shown, during use, the centrifugal fan wheel 2 is installed inside the fan housing. The motor 11 is inserted into the shaft groove 10 through the rotating shaft 7, and the rotating shaft 7 is fixedly connected to the shaft groove 10 by bolts. The motor 11 drives the rotating shaft 7 to rotate rapidly, which in turn causes the centrifugal fan wheel 2 to rotate rapidly. External air enters through the air inlet 6, and after passing through the air guide vanes 4 and air guide ribs 8, the air flows through the air guide cavity 3 and enters the fan housing. It is then discharged through the air outlet on the fan housing. The circumferential brush 12 fills the gap between the centrifugal fan wheel 2 and the rotating position of the fan housing, preventing air from leaking out of the gap and ensuring the air output effect of the centrifugal fan.
[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. An AC backward centrifugal fan, comprising a centrifugal impeller (2), characterized in that: The centrifugal fan wheel (2) is provided with a guide vane (4) circumferentially on the inner side, and a guide rib (8) is provided on the side of the guide vane (4). A circumferential brush (12) is provided on the outer side of the centrifugal fan wheel (2). A support frame (1) is formed in the center of the centrifugal fan wheel (2). A heat dissipation groove (5) is provided circumferentially on the side of the support frame (1).
2. The AC backward centrifugal fan according to claim 1, characterized in that: The support frame (1) has a motor slot (9) inside, a motor (11) is installed in the motor slot (9), and a rotating shaft (7) is installed at the output end of the motor (11).
3. The AC backward centrifugal fan according to claim 2, characterized in that: The centrifugal fan wheel (2) has an air inlet (6) at the center opening position, and the air guide blades (4) are separated into air guide chambers (3).
4. The AC backward centrifugal fan according to claim 2, characterized in that: The support frame (1) has a shaft groove (10) at the position corresponding to the rotating shaft (7), and the rotating shaft (7) and the shaft groove (10) are connected by bolts.
5. The AC backward centrifugal fan according to claim 1, characterized in that: The air guide blade (4) and the centrifugal fan wheel (2) are integrally formed, and the air guide rib (8) and the air guide blade (4) are integrally formed.
6. The AC backward centrifugal fan according to claim 1, characterized in that: The circumferential brush (12) is bonded to the centrifugal fan wheel (2).