An assembly structure of a centrifugal fan

Abstract

The utility model relates to a new trend system centrifugal fan technical field discloses a kind of assembly structure of centrifugal fan, including motor assembly, the outer wall of motor assembly is fixedly connected with volute, the upper end of the rear side of volute is all threadedly connected with self-tapping screw, the front end of self-tapping screw is threadedly connected with air intake cover, the inner wall front side of air intake cover is fixedly connected with sound-absorbing sheet, the rear side of sound-absorbing sheet is fixedly connected with sound-absorbing cotton, the inner wall middle part of volute is fixedly connected with zinc alloy support, the upper side of zinc alloy support is all set with stator group, the upper side middle part of zinc alloy support is fixedly connected with PCB board assembly.Outside rotor motor structure is connected with centrifugal impeller in the utility model, so as to ensure the stability of connection, then through zinc alloy support, the stability of new air device internal structure is improved, simultaneously under the installation of sound-absorbing cotton and sound-absorbing sheet, so as to reduce the generation of vibration noise.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal fan technology for fresh air systems, and in particular to an assembly structure for a centrifugal fan. Background Technology

[0002] Currently, fresh air systems utilize patented fresh air convection technology. Through autonomous air supply and exhaust, indoor air is convected, maximizing indoor air replacement. The built-in multi-functional purification device ensures clean and healthy air entering the room. The centrifugal fan within the system converts mechanical energy into kinetic and pressure energy of the gas through a high-speed rotating impeller. It consists of an impeller, volute, inlet and outlet, motor, bearings, and support. During operation, gas enters the impeller center axially from the fan. The impeller blades drive the gas to rotate at high speed. Under centrifugal force, the gas is thrown towards the outer edge of the impeller, significantly increasing its kinetic and pressure energy. The high-speed gas enters the volute-shaped channel, where its speed decreases, and its kinetic energy is further converted into static pressure energy. The high-pressure gas is then discharged through the outlet, completing the transportation or pressurization process.

[0003] A search revealed Chinese patent publication number CN214465097U, which discloses an assembly structure for a centrifugal fan impeller, relating to the field of fan technology. The invention addresses the problem that existing impellers require sequential blade installation during assembly, which can easily damage the blades during bending. The upper surface of the air inlet plate is equipped with blades, and several blades are arranged. A motor connection plate is arranged on the blades. The air inlet plate is equipped with several sockets. The motor connection plate is equipped with several sockets. A bushing is arranged on the upper surface of the motor connection plate. A motor shaft hole is arranged inside the bushing. Four connecting ribs are installed on the bushing. A first fixing screw is installed on one side of the connecting rib, and one side of the connecting rib is fixedly connected to the air inlet plate by the first fixing screw. A fixing head is arranged on the other side of the connecting rib. However, in actual use, the device will vibrate when the impeller and blades rotate. When there is an installation error, the vibration will be transmitted to other components of the fresh air device, resulting in increased noise and affecting the user experience. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an assembly structure for a centrifugal fan, which aims to improve the problem that vibrations are generated when the impeller and blades rotate in the prior art. When installation errors occur, the vibrations are transmitted to other components of the fresh air system, resulting in increased noise and affecting the user experience.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an assembly structure for a centrifugal fan, comprising a motor assembly, a volute fixedly connected to the outer wall of the motor assembly, self-tapping screws threadedly connected to the upper and lower ends of the rear side of the volute, an air inlet shroud threadedly connected to the front end of the self-tapping screws, a sound-absorbing sheet fixedly connected to the front side of the inner wall of the air inlet shroud, sound-absorbing cotton fixedly connected to the rear side of the sound-absorbing sheet, a zinc alloy bracket fixedly connected to the middle of the inner wall of the volute, stator assemblies provided on the upper and lower sides of the zinc alloy bracket, a PCB board assembly fixedly connected to the middle of the upper and lower sides of the zinc alloy bracket, a centrifugal impeller rotatably connected inside the zinc alloy bracket, an installation component provided at the bottom front side of the air inlet shroud, and a power cord assembly provided at the front side of the bottom PCB board assembly.

[0006] The above technical solution allows for the connection between the external rotor motor and the centrifugal impeller, followed by the installation and fixation of the stator assembly. This ensures the stability of the internal components of the device and reduces the likelihood of installation instability during centrifugal fan operation. Furthermore, the installation of sound-absorbing cotton and sound-absorbing sheets further reduces vibration and noise generation.

[0007] As a further description of the above technical solution:

[0008] The power cord assembly includes multiple power lines, the top ends of which are fixedly connected to the front side of the PCB board assembly, the bottom ends of which are fixedly connected to terminals, the middle of which is fixedly connected to a connector, and the left and right sides of the outer wall of which are fixedly connected to anti-detachment buckles.

[0009] The above technical solution improves the connection effect of the power cord assembly. The anti-detachment buckle enhances the anti-detachment effect when the terminal is connected, avoiding the possibility of unstable operation of the device due to unstable connection and reducing the possibility of loose power cord connection.

[0010] As a further description of the above technical solution:

[0011] The power cord assembly also includes a sheath, the inner wall of which is fixedly connected to the outer wall of the plurality of power lines.

[0012] The above technical solution improves the protection of the outer wall of the power line by connecting the protective sleeve.

[0013] As a further description of the above technical solution:

[0014] The mounting assembly includes a mounting plate, the top of which is fixedly connected to the bottom front side of the air inlet shroud, and the bottom of which has a mounting groove.

[0015] The above technical solution enables convenient installation of the device through the connection between the mounting plate and the mounting slot.

[0016] As a further description of the above technical solution:

[0017] A sponge is fixedly connected to the top right side of the vortex shell, and a nameplate is fixedly connected to the middle of the sponge.

[0018] The above technical solution reduces wear on the volute housing caused by the sponge connection, while also making it easier to identify the device.

[0019] As a further description of the above technical solution:

[0020] Multiple screws are fixedly connected to the rear middle of the vortex casing, and the ends of the multiple screws are respectively fixedly connected to the rear side of the air inlet shroud.

[0021] The above technical solution improves the connection effect between the vortex housing and the air inlet shroud by using multiple screws.

[0022] As a further description of the above technical solution:

[0023] Both self-tapping screws are symmetrically designed, and all screws are arranged in a ring.

[0024] The above technical solution improves the stability of the connection by using a symmetrical design for all self-tapping screws and a circular arrangement for all screws.

[0025] As a further description of the above technical solution:

[0026] Both the outer walls of the vortex casing and the air inlet shroud are designed to be smooth, and the sheath is designed to be a flexible hose.

[0027] The above technical solution allows for a smooth design on the outer walls of both the vortex casing and the air inlet shroud, thereby improving the pressure resistance of the outer wall of the device.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the connection between the external rotor motor and the centrifugal impeller is ensured by adopting an external rotor motor structure, thereby ensuring the stability of the connection. Subsequently, the stability of the internal structure of the fresh air device is improved by the stator assembly installation, which reduces the possibility of unstable installation during the operation of the centrifugal fan. At the same time, the installation of sound-absorbing cotton and sound-absorbing sheets reduces the generation of vibration noise.

[0030] 2. In this utility model, by using a power cord assembly for connection, the connection effect of the power cord is improved. The anti-detachment buckle fixation further increases the anti-detachment effect when the terminal is connected, avoiding the possibility of unstable internal operation of the device due to unstable connection, thereby increasing the stability of the device. Attached Figure Description

[0031] Figure 1 This is a front view of the assembly structure of a centrifugal fan proposed in this utility model;

[0032] Figure 2 This is a cross-sectional view of the air inlet shroud of the assembly structure of a centrifugal fan proposed in this utility model;

[0033] Figure 3 This is a schematic diagram of the volute casing of the centrifugal fan assembly structure proposed in this utility model;

[0034] Figure 4 This is a schematic diagram of the nameplate structure of the centrifugal fan assembly structure proposed in this utility model;

[0035] Figure 5 This is a schematic diagram of the zinc alloy bracket for the assembly structure of a centrifugal fan proposed in this utility model.

[0036] Figure 6 This is a schematic diagram of the power cord assembly of a centrifugal fan assembly structure proposed in this utility model.

[0037] Legend:

[0038] 1. Motor assembly; 2. Vortex housing; 3. Air inlet shroud; 4. Self-tapping screws; 5. Screws; 6. Nameplate; 7. Sound-absorbing cotton; 8. Noise-absorbing sheet; 9. Stator assembly; 10. Zinc alloy bracket; 11. PCB board assembly; 12. Power cord assembly; 13. Terminals; 14. Centrifugal impeller; 15. Mounting plate; 16. Mounting slot; 17. Power line; 18. Sheath; 19. Anti-detachment clip; 20. Connector; 21. Sponge. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0040] Reference Figure 1 , Figure 2 and Figure 5This utility model provides an embodiment of a centrifugal fan assembly structure, including a motor assembly 1. A volute 2 is fixedly connected to the outer wall of the motor assembly 1, through which a centrifugal impeller 14 can be connected. Self-tapping screws 4 are threaded to the upper and lower rear ends of the volute 2. An air inlet shroud 3 is threaded to the front end of each self-tapping screw 4, thus connecting the air inlet shroud 3. A sound-absorbing sheet 8 is fixedly connected to the front side of the inner wall of the air inlet shroud 3, and sound-absorbing cotton 7 is fixedly connected to the rear side of the sound-absorbing sheet 8. The connection of the sound-absorbing sheet 8 and the sound-absorbing cotton 7 reduces the noise generated during operation. A zinc alloy bracket 10 is fixedly connected to the middle of the inner wall of the volute 2. Stator assemblies 9 are provided on both the upper and lower sides of the zinc alloy bracket 10. The upper and lower sides of the 0 are fixedly connected to the PCB board assembly 11. The connection through the zinc alloy bracket 10 improves the stability of the internal structure of the device. The centrifugal impeller 14 is rotatably connected inside the zinc alloy bracket 10. The front bottom of the air inlet shroud 3 is provided with the mounting component. The front side of the bottom PCB board assembly 11 is provided with the power cord assembly 12. The motor assembly 1 includes a rotor magnetic ring, which is fixedly connected to the inner ring in the middle of one side of the centrifugal impeller 14. The stator assembly 9 is movably connected to the inside of the rotor magnetic ring through a magnetic levitation air gap, and the air gap between the two is 0.2-2mm. At the same time, in this embodiment, the internal iron core composition of the stator assembly can be selected as a twelve-slot ten-pole or twelve-slot fourteen-pole structure.

[0041] Specifically, by adopting an external rotor motor structure design, a tight connection with the centrifugal impeller 14 is achieved. On this basis, the connection effect between the volute 2 and the air inlet shroud 3 is improved through the cooperation of multiple self-tapping screws 4 and screws 5, ensuring the stability and reliability of the connection. Furthermore, with the support of the zinc alloy bracket 10 and the installation of the stator assembly 9, the stability of the internal structure of the fresh air device is further enhanced, effectively reducing the problem of installation instability during the operation of the centrifugal fan. In addition, the installation of sound-absorbing cotton 7 and sound-absorbing sheet 8 successfully reduces the vibration noise generated by the device during operation, thereby avoiding the impact of noise on the normal use environment and ensuring a quieter and more comfortable user experience.

[0042] Reference Figure 1 , Figure 5 and Figure 6 The power cord assembly 12 includes multiple power lines 17. The top ends of the multiple power lines 17 are fixedly connected to the front side of the PCB board assembly 11. The power lines 17 enable current transmission. The bottom ends of the multiple power lines 17 are fixedly connected to terminals 13. The middle of the terminals 13 is fixedly connected to a connector 20, so that the terminals 13 can cooperate with the connector 20 to complete the circuit connection. The left and right sides of the outer wall of the terminals 13 are fixedly connected to anti-disengagement buckles 19. The connection stability of the power cord assembly 12 is improved by the connection of the anti-disengagement buckles 19.

[0043] Specifically, by adopting the power cord assembly 12, the connection effect of the power line 17 is improved, and the anti-detachment effect of the terminal 13 and connector 20 is enhanced when connected under the firm fixation of the anti-detachment buckle 19. This avoids the problem of unstable internal operation of the device caused by unstable connection. Therefore, through these measures, the safety of the entire device is effectively improved.

[0044] Reference Figure 2 , Figure 4 and Figure 6 The power cord assembly 12 also includes a sheath 18, the inner wall of which is fixedly connected to the outer wall of the plurality of power lines 17; the mounting assembly includes a mounting plate 15, the top of which is fixedly connected to the bottom front side of the air inlet shroud 3, and the bottom of the mounting plate 15 is provided with a mounting groove 16; a sponge 21 is fixedly connected to the top right side of the vortex 2, and a nameplate 6 is fixedly connected to the middle of the sponge 21.

[0045] Specifically, the protective sleeve 18 protects the outer wall of the power line 17, and the mounting plate 15 and mounting groove 16 enable convenient installation of the device. The sponge 21 reduces the wear and tear on the volute 2 during the installation of the nameplate 6.

[0046] Reference Figure 1 and Figure 3 Multiple screws 5 are fixedly connected to the rear middle of the volute 2, and the ends of the multiple screws 5 are fixedly connected to the rear of the air inlet shroud 3 respectively; the two self-tapping screws 4 are both symmetrically designed, and the multiple screws 5 are all arranged in a ring; the outer walls of the volute 2 and the air inlet shroud 3 are both smooth, and the sheath 18 is a flexible hose design.

[0047] Specifically, the connection between the volute 2 and the air inlet shroud 3 is improved by the screw 5. The symmetrical design of the self-tapping screw 4 and the circular arrangement of the multiple screws 5 improve the uniformity of the connection. The smooth design of the outer walls of both the volute 2 and the air inlet shroud 3 improves the compressive strength of the outer walls of both volute 2 and the air inlet shroud 3.

[0048] Working principle: When in use, an external rotor motor is used to connect with the centrifugal impeller 14. Then, with the connection of multiple self-tapping screws 4 and screws 5, the connection effect between the volute 2 and the air inlet shroud 3 is improved, thus ensuring the stability of the connection. Subsequently, with the installation of the zinc alloy bracket 10 and the stator assembly 9, the stability of the internal structure of the fresh air device is improved, which reduces the possibility of unstable installation during the operation of the centrifugal fan. At the same time, the installation of sound-absorbing cotton 7 and sound-absorbing sheet 8 reduces the generation of vibration noise during the operation of the device, thus avoiding the situation affecting normal use.

[0049] Furthermore, the use of power cord assembly 12 improves the connection effect of power line 17. With the anti-detachment clip 19 securing it, the anti-detachment effect when terminals 13 and connector 20 are connected is increased, thus preventing unstable connection that could lead to unstable internal operation of the device. This increases the safety of the device.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An assembly structure for a centrifugal fan, comprising a motor assembly (1), characterized in that: The outer wall of the motor assembly (1) is fixedly connected to a volute (2). The upper and lower ends of the rear side of the volute (2) are threaded with self-tapping screws (4). The front end of the self-tapping screws (4) is threaded with an air inlet shroud (3). The front side of the inner wall of the air inlet shroud (3) is fixedly connected with a sound-absorbing sheet (8). The rear side of the sound-absorbing sheet (8) is fixedly connected with sound-absorbing cotton (7). The middle of the inner wall of the volute (2) is fixedly connected with a zinc alloy bracket (10). The upper and lower sides of the zinc alloy bracket (10) are provided with stator assemblies (9). The middle of the upper and lower sides of the zinc alloy bracket (10) is fixedly connected with a PCB board assembly (11). The inside of the zinc alloy bracket (10) is rotatably connected with a centrifugal impeller (14). The bottom front side of the air inlet shroud (3) is provided with an installation component. The front side of the bottom PCB board assembly (11) is provided with a power cord assembly (12).

2. The assembly structure of a centrifugal fan according to claim 1, characterized in that: The power cord assembly (12) includes multiple power lines (17), the top ends of the multiple power lines (17) are fixedly connected to the front side of the PCB board assembly (11), the bottom ends of the multiple power lines (17) are fixedly connected to terminals (13), the middle part of the terminals (13) is fixedly connected to connectors (20), and the left and right sides of the outer wall of the terminals (13) are fixedly connected to anti-disengagement buckles (19).

3. The assembly structure of a centrifugal fan according to claim 2, characterized in that: The power cord assembly (12) also includes a sheath (18), the inner wall of which is fixedly connected to the outer wall of the plurality of power lines (17).

4. The assembly structure of a centrifugal fan according to claim 1, characterized in that: The mounting assembly includes a mounting plate (15), the top of which is fixedly connected to the bottom front side of the air inlet shroud (3), and the bottom of the mounting plate (15) is provided with a mounting groove (16).

5. The assembly structure of a centrifugal fan according to claim 1, characterized in that: A sponge (21) is fixedly connected to the top right side of the vortex shell (2), and a nameplate (6) is fixedly connected to the middle of the sponge (21).

6. The assembly structure of a centrifugal fan according to claim 1, characterized in that: A plurality of screws (5) are fixedly connected to the middle of the rear side of the vortex shell (2), and the ends of the plurality of screws (5) are fixedly connected to the rear side of the air inlet shroud (3).

7. The assembly structure of a centrifugal fan according to claim 6, characterized in that: Both of the self-tapping screws (4) are symmetrically designed, and the multiple screws (5) are arranged in a ring.

8. The assembly structure of a centrifugal fan according to claim 3, characterized in that: The outer walls of the vortex shell (2) and the air inlet shroud (3) are both designed to be smooth, and the sheath (18) is designed to be flexible.

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