Cooling fan module
By installing a soundproof cover and sound-absorbing material in the cooling fan module, the motor noise is isolated and absorbed, solving the problem of increased noise in traditional cooling fan modules and achieving noise reduction and improved acoustic performance.
Patent Information
- Application Number
- CN202520068163.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-13
AI Technical Summary
The noise problem generated by traditional cooling fan modules during operation, especially the increased noise caused by air fluctuations due to motor vibration, airflow dynamics, and magnetism.
A soundproof cover is installed in the cooling fan module. The soundproof cover is housed in the hub and is arranged radially between the hub and the motor. The soundproof cover and sound-absorbing material are used to isolate and absorb motor noise. The soundproof cover can be isolated from or in contact with the motor rotor. The sound-absorbing material is fixed by clamping, bonding or other methods.
It effectively reduces motor noise, improves the acoustic performance of the cooling fan module, and meets customer requirements for vibration and noise (NVH) performance.
Smart Images
Figure CN223594475U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of vehicle, concretely relates to cooling fan module. BACKGROUND
[0002] Cooling fan module is an important functional component in vehicle thermal system, its function is to deliver the outside cold air to the heat exchanger, and discharge hot air from it. The traditional cooling fan module generally includes motor and fan and the wind -proof ring of supporting motor and fan. When the motor of cooling fan module rotates, the vibration of motor, the force produced by flowing air and magnetic force will all cause air fluctuation, thus producing noise. In addition, the traditional fan impeller hub usually has recess, which will collect and reflect sound, like a horn, causing noise enhancement.
[0003] At present, the customer's requirement to vibration noise (NVH) performance is higher and higher, it will pay close attention to whether the noise can reach the standard requirement. Therefore, there is the need to improve the acoustic performance of cooling fan module. SUMMARY
[0004] The purpose of the utility model is to optimize the above-mentioned shortcomings, namely: the noise of cooling fan module.
[0005] Therefore, the utility model provides a kind of cooling fan module, it is provided with soundproof cover to insulate and absorb at least some noise from motor. Cooling fan module includes motor and fan and the wind -proof ring of supporting motor and fan, fan includes impeller and fan blade, the impeller has hub portion and outer ring, the fan blade is fixed to hub portion, between hub portion and outer ring. According to the utility model, the soundproof cover of cooling fan module is contained in hub portion, is arranged between hub portion and motor along radial direction.
[0006] According to embodiment, soundproof cover is configured to be arranged concentrically around motor, for example, completely around or only partially around.
[0007] According to embodiment, soundproof cover has axial height, which is configured to cover rotor or stator of motor in axial direction entirely or at least partially. With this arrangement, noise from motor can be insulated and / or absorbed.
[0008] According to embodiment, soundproof cover is at a certain distance from rotor of motor in radial direction or in contact with rotor.
[0009] According to embodiment, soundproof cover is configured to be an integral part of fan. Alternatively, soundproof cover can also be a separate component fixed on impeller hub portion of fan, for example by clamping, bonding, overmolding, encapsulation molding, ultrasonic welding, etc. For example, soundproof cover is provided with welding groove on the side axially facing hub portion. Correspondingly, hub portion is provided with welding line on the surface facing soundproof cover, so as to be fixed in welding groove.
[0010] According to an embodiment, the sound shield comprises a main structure part having a main structure surface facing the motor and at least one layer of sound absorbing material covering the main structure surface. The sound absorbing material has a thickness of 2-15 mm.
[0011] According to an embodiment, the main structure part of the sound shield is made of a plastic with a higher rigidity, such as PA6 or PP, for sound insulation and structural stability.
[0012] According to an embodiment, the sound absorbing material is at a distance from the rotor of the motor or in contact with the surface of the rotor of the motor.
[0013] According to an embodiment, the sound absorbing material can be fixed on the main structure part, for example by clamping, gluing, overmolding, encapsulation, etc.
[0014] According to an embodiment, the sound absorbing material is a foam or a fiber material, such as TPE, damping rubber, glass fiber, etc., which has a higher acoustic resistance and / or a lower acoustic reflection compared to the fan material. For example, the sound absorbing material is damping rubber, which has a rib around the periphery, preferably uniformly distributed in the circumferential direction. Correspondingly, the main structure part has a groove around the inner periphery, preferably uniformly distributed in the circumferential direction, so that the rib is clamped therein, thereby fixing the sound absorbing material. Alternatively, the sound absorbing material is TPE, which is fixed to the main structure part by encapsulation. Alternatively, the sound absorbing material is glass fiber, which is fixed to the main structure part by gluing. Alternatively, the sound absorbing material has a protrusion around the periphery, preferably uniformly distributed in the circumferential direction. Correspondingly, the main structure part has a notch around the periphery, preferably uniformly distributed in the circumferential direction, so that the protrusion is clamped therein, thereby fixing the sound absorbing material, and the main structure part has a reinforcing rib around the outer periphery, which is arranged at a distance from the notch. The rib and the protrusion can extend along a partial axial height of the sound shield. The rib can also extend along the entire axial height of the sound shield, for example some extend along a partial axial height and some extend along the entire axial height.
[0015] According to an embodiment, the hub part of the fan impeller is provided with an additional heat dissipation structure, such as a notch or a through hole, which is arranged on the surface of the hub part facing the air flow, so as to improve the heat dissipation capacity of the motor, even though the sound shield can affect the heat dissipation capacity.
[0016] According to an embodiment, the cooling fan module further comprises a motor support radially outside the motor base, which is mounted to the motor base.
[0017] According to the cooling fan module of the utility model, the motor noise can be reduced, thereby improving the acoustic performance. BRIEF DESCRIPTION OF DRAWINGS
[0018] The embodiments of the utility model will be explained in more detail in the drawings, in which:
[0019] Figure 1Ais a schematic cross-sectional view of the cooling fan module of the embodiment of the present utility model, wherein the motor is removed;
[0020] Figure 1B is Figure 1A a partial enlarged view, wherein the motor is shown;
[0021] Figure 2A is Figure 1A a schematic exploded axial side view of the cooling fan module of the embodiment of the present utility model, wherein the motor is removed;
[0022] Figure 2B is Figure 1A a schematic axial side view of the cooling fan module of the embodiment of the present utility model, wherein the motor is removed;
[0023] Figure 2C is Figure 1A a schematic axial side view of the cooling fan module of the embodiment of the present utility model, wherein the motor is shown;
[0024] Figure 3A is a schematic cross-sectional view of the cooling fan module of the embodiment of the present utility model, wherein the motor base is also shown;
[0025] Figure 3B is Figure 3A a partial enlarged view;
[0026] Figure 4A is a schematic cross-sectional view of the cooling fan module of the prior art, wherein the motor base and the motor support are also shown;
[0027] Figure 4B is Figure 1A a schematic cross-sectional view of the cooling fan module of the embodiment of the present utility model, wherein the motor base and the motor support are also shown;
[0028] Figure 5A is Figure 1A a schematic perspective view of the soundproof cover of the cooling fan module of the embodiment of the present utility model;
[0029] Figure 5B is Figure 5A a schematic perspective view of the main structure part of the soundproof cover;
[0030] Figure 5C is Figure 5A a schematic perspective view of the sound-absorbing material of the soundproof cover;
[0031] Figure 6A is Figure 5A a partial enlarged view;
[0032] Figure 6B is Figure 5B a partial enlarged view;
[0033] Figure 6C is Figure 5Ca partial enlarged view of
[0034] Figure 6D is Figure 5A a partial sectional view of a main structure part of the soundproof cover of
[0035] Figure 6E is Figure 5A a partial sectional view of sound-absorbing material of the soundproof cover of
[0036] Figure 7A is Figure 1A a schematic perspective view of the cooling fan module of
[0037] Figure 7B is Figure 7A a partial enlarged sectional view of the cooling fan module of
[0038] Figure 8A is a schematic sectional view of the cooling fan module of another embodiment of the utility model;
[0039] Figure 8B is Figure 8A a partial enlarged view of
[0040] Figure 9A is Figure 8A a schematic exploded perspective view of the cooling fan module of, wherein the motor is removed;
[0041] Figure 9B is Figure 8A a schematic perspective view of the cooling fan module of, wherein the motor is removed;
[0042] Figure 9C is Figure 8A a schematic perspective view of the cooling fan module of, wherein the motor is shown;
[0043] Figure 10A is Figure 8A a schematic perspective view of the soundproof cover of the cooling fan module of
[0044] Figure 10B is Figure 10A a schematic perspective view of a main structure part of the soundproof cover of
[0045] Figure 10C is Figure 10A a schematic perspective view of sound-absorbing material of the soundproof cover of
[0046] Figure 11A is Figure 9A a partial sectional view of the cooling fan module of
[0047] Figure 11B is Figure 11A a partial sectional view of the soundproof cover of
[0048] Figure 11C is a partial cross-sectional view of the hub portion of Figure 11A
[0049] Figure 11D is a partial enlarged view of Figure 11A
[0050] In the drawings, the embodiments of the application are shown in a simplified manner for the sake of clarity. The drawings are not necessarily to scale. Like reference numerals in the drawings designate like parts. DETAILED DESCRIPTION
[0051] Embodiments of the application are described below with reference to Figures 1A-1 ID .
[0052] For the sake of clarity, directional terms such as "axial" and "radial" are used below, with reference to the fan and the motor of the cooling fan module.
[0053] Figures 1A-1B A cooling fan module 1 according to an embodiment of the application is shown, comprising a fan 100, a soundproofing cover 200 and a motor 300. The fan 100 comprises an impeller having a hub portion 110 and an outer ring 130, and a fan blade 120 fixed to the hub portion 110 between the hub portion 110 and the outer ring 130. The cooling fan module further comprises a motor base 330 mounted to the motor 200, and a motor support 340 radially outside the motor base 330, mounted to the motor base 330. Furthermore, the soundproofing cover 200 has an axial height configured to cover the rotor 310 or the stator 320 of the motor 300 in the axial direction, and to be at a distance from the rotor 310 of the motor 300 in the radial direction. It is also possible that the soundproofing cover is in contact with the rotor of the motor in the radial direction.
[0054] Figures 2A-2C A shaft side view of the cooling fan module 1 is shown. As shown, the soundproofing cover 200 is housed within the hub portion 110, arranged radially between the hub portion 110 and the motor 300, and arranged concentrically around the motor 300. The soundproofing cover 200 comprises a main structure portion 210 and at least one layer of sound absorbing material 220. When mounted, the main structure portion 210 of the soundproofing cover 200 is first mounted within the hub portion 110 (e.g. injection molded to the hub portion 110 in the same process in which the hub portion 110 is injection molded), as shown in Figure 2A , the sound absorbing material 220 is then mounted, as shown in Figure 2B , and the motor 300 is then fitted therein, as shown in Figure 2C .
[0055] Figures 3A-3B A cross-sectional view of the cooling fan module 1 is shown. As shown, the sound absorbing material 220 is spaced apart from the motor rotor 310. It is also possible that the sound absorbing material is in contact with the surface of the motor rotor.
[0056] Figures 4A-4B A comparison of a conventional cooling fan module and the cooling fan module of the present embodiment is shown, where the dotted arrows show the transmission path of the noise. As can be seen from the figure, in the conventional structure, the noise from the motor is transmitted in a wide range under the hub portion 110' and the motor rotor 310', while in the present embodiment, the sound shield 200 insulates the transmission of part of the noise.
[0057] Figures 5A-5C The configuration of the sound shield 200 is shown, which includes a main structure portion 210 having a main structure surface facing the motor, and at least one layer of sound absorbing material 220 covering the main structure surface, with a thickness of 2-15 mm. Figure 5B and Figure 5C The main structure portion 210 and the sound absorbing material 220 are shown respectively. As shown, the sound absorbing material 220 is provided with a plurality of ribs 240 distributed uniformly in the circumferential direction around the outer periphery thereof, which extend along part of the axial height of the sound shield 200. Correspondingly, the main structure portion 210 is provided with a plurality of grooves 230 distributed uniformly in the circumferential direction around the inner periphery thereof, so that the ribs 240 are clamped therein, thereby fixing the sound absorbing material 220. In addition, the sound absorbing material 220 is also provided with a plurality of ribs 240 extending along the entire axial height of the sound shield around the outer periphery thereof. In this example, both the main structure portion 210 and the sound absorbing material 220 are of hollow cylindrical configuration. Other configurations are also possible.
[0058] Figures 6A-6E The way the main structure portion 210 of the sound shield 200 is fixed to the sound absorbing material 220 is shown. As shown, the main structure portion 210 is provided with a plurality of grooves 230 extending along part of the axial height and the entire axial height of the sound shield around the inner periphery thereof. Correspondingly, the sound absorbing material 220 is provided with a plurality of ribs 240 extending along part of the axial height and the entire axial height of the sound shield around the outer periphery thereof, so as to be clamped in the grooves 230.
[0059] In this example, the main structure 210 is configured as an integral part of the hub 110. The main structure 210 is made of a plastic with a higher stiffness, such as PA6 or PP. On the other hand, the sound absorbing material 220 is fixed to the main structure 210 by clamping. The sound absorbing material is a damping rubber. It is also possible that the main structure is fixed to the hub of the fan by clamping, gluing, overmolding, encapsulation, etc., and that the sound absorbing material is fixed to the main structure by gluing, overmolding, encapsulation, etc., and that the sound absorbing material is a TPE or a glass fiber, etc. In any case, the sound absorbing material is a foam or fiber material with a higher acoustic resistance and / or a lower acoustic reflection than the material of the fan.
[0060] Figures 7A-7B It is shown that the hub 110 of the fan 100 is provided with additional heat dissipation structures in the form of notches or through holes 111, which are provided on the surface of the hub facing the air flow. It is shown that two sets of heat dissipation structures are provided, which are arranged radially on the inside and on the outside, respectively. Other arrangements are also possible.
[0061] Figures 8A-8B It is shown that the cooling fan module 1000 according to another embodiment of the application likewise comprises a fan 1100, a soundproof cover 1200 and a motor 1300. The fan 1100 comprises an impeller having a hub 1110 and an outer ring 1130, and a fan blade 1120, which is fixed to the hub 1110 between the hub 1110 and the outer ring 1130. The cooling fan module further comprises a motor base 1330, which is mounted to the motor 1200, and a motor support 1340, which is mounted to the motor base 1330 radially outside the motor base 1330. Furthermore, as in the above-described embodiments, the soundproof cover 1200 has an axial height, which is configured to axially cover the rotor or stator of the motor 1300 and to be radially at a distance from the rotor of the motor 1300. It is also possible that the soundproof cover is in contact with the rotor of the motor 1300 in the radial direction.
[0062] Figures 9A-9C A perspective view of the cooling fan module 1000 is shown. As shown, the soundproof cover 1200 is accommodated in the hub 1110, arranged radially between the hub 1110 and the motor 1300, and arranged concentrically completely around the motor 1300. When mounting, the soundproof cover 1200 is first mounted into the hub 1110, as shown in Figure 9B , and then the motor 1300 is fitted therein, as shown in Figure 9C .
[0063] Figures 10A-10CThe construction of the sound shield 1200 is shown, which includes a main structure portion 1210 having a main structure surface facing the motor, and at least one layer of sound absorbing material 1220, which is applied to the main structure surface with a thickness of 2-5 mm. Figure 10B and Figure 10C The main structure portion 1210 and the sound absorbing material 1220 are shown separately. As shown, the sound absorbing material 1220 is provided with protrusions 1240 distributed uniformly in the circumferential direction around the periphery thereof, which extend along a partial axial height of the sound shield 1200. Correspondingly, the main structure portion 1210 is provided with notches 1230 distributed uniformly in the circumferential direction around the periphery thereof, so that the protrusions 1240 are clamped therein, thereby fixing the sound absorbing material 1220. In addition, the main structure portion 1210 is provided with reinforcing ribs 1250 arranged at intervals with the notches 1230. In this example, both the main structure portion 1210 and the sound absorbing material 1220 are of a hollow truncated cone construction. Other constructions are also possible.
[0064] The sound absorbing material is spaced apart from the surface of the motor rotor. It is also possible that the sound absorbing material is in contact with the surface of the motor rotor.
[0065] Figures 11A-11D How the sound shield 1200 is fixed to the hub portion 1110 is shown. As shown, the sound shield 1200 is provided with a welding groove 1260 on the side facing the hub portion 1110 in the axial direction. Correspondingly, the hub portion 1110 is provided with a welding line 1140 on the surface facing the sound shield 1200, so as to be fixed in the welding groove 1260, for example by an ultrasonic welding process.
[0066] In some cases, the features disclosed in the present utility model can be used independently of other features. On the other hand, when necessary, the features disclosed in the present utility model can be combined to provide various combinations.
[0067] The words and expressions used in the present utility model are all illustrative and not restrictive, and therefore the use of these words and expressions does not intend to exclude any equivalent of the illustrated and described features from the scope of the present utility model. There can be various modifications, variations and alternatives within the scope of the claims. The claims are intended to cover all such equivalent.
Claims
1. A cooling fan module, comprising a motor and a fan, the fan including an impeller and fan blades, the impeller having a hub and an outer ring, the fan blades being fixed to the hub and located between the hub and the outer ring, characterized in that, The soundproof cover for the cooling fan module is housed within the hub and is arranged radially between the hub and the motor.
2. The cooling fan module according to claim 1, characterized in that, The soundproof enclosure is constructed to be arranged completely or partially concentrically around the motor.
3. The cooling fan module according to claim 1 or 2, characterized in that, The soundproof enclosure has an axial height and is configured to at least partially cover the rotor or stator of the motor in the axial direction and to be radially spaced from or in contact with the rotor of the motor.
4. The cooling fan module according to claim 1 or 2, characterized in that, The soundproof enclosure can be constructed as an integral part of the fan or as a separate component fixed to the hub of the fan.
5. The cooling fan module according to claim 4, characterized in that, The soundproof cover has a welding groove on the side facing the hub in the axial direction, and the hub has a welding line on the surface facing the soundproof cover so as to be fixed in the welding groove.
6. The cooling fan module according to claim 1 or 2, characterized in that, The soundproof enclosure includes a main structural part and at least one layer of sound-absorbing material. The main structural part has a main structural surface facing the motor, and the sound-absorbing material covers the main structural surface with a thickness of 2-15 mm.
7. The cooling fan module according to claim 6, characterized in that, The sound-absorbing material is placed at a certain distance from the motor rotor or in contact with the surface of the motor rotor.
8. The cooling fan module according to claim 6, characterized in that, The sound-absorbing material is fixed to the main structure.
9. The cooling fan module according to claim 6, characterized in that, The sound-absorbing material has ribs around its outer perimeter and grooves around its inner perimeter to clamp the ribs; or, the sound-absorbing material has protrusions around its outer perimeter and notches around its inner perimeter to clamp the protrusions.
10. The cooling fan module according to claim 1 or 2, characterized in that, The hub of the fan has slots or through holes on the surface of the hub facing the airflow.