Fan damping device and air conditioner

Abstract

The utility model provides a fan damping device, air conditioner, wherein fan damping device includes: volute, one side of volute has first mounting seat, the other side of volute has second mounting seat, be provided with fan blade in volute, be provided with driving element on first mounting seat, the driving shaft of driving element passes through after fan blade and is connected with second mounting seat, be provided with first damping component between driving element with first mounting seat, be provided with second damping component between driving shaft with fan blade, be provided with third damping component between driving shaft with second mounting seat. According to the utility model can, can solve the technical problem of the increasing noise of fan in the prior art that the internal components of fan are connected by rigidity.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioner technology, specifically relating to a fan vibration damping device and an air conditioner. Background Technology

[0002] As a common household appliance, the air delivery performance of floor-standing air conditioners directly affects user comfort and experience. To meet industry standards (such as GB / T 18837 "Room Air Conditioners") regarding air volume requirements, floor-standing air conditioners typically use multiple small-diameter centrifugal fans to ensure sufficient air volume and air pressure. However, to reduce manufacturing costs and simplify assembly, some floor-standing air conditioners have switched to using a single large-diameter centrifugal fan. While this design reduces costs, it significantly increases the fan's diameter and thickness, leading to increased rotational inertia and increased vibration when the air conditioner is running at its highest setting.

[0003] In actual operation, because the motor, fan blades, and other components inside the fan are usually rigidly fixed to the air conditioner's body, vibrations can easily be transmitted to the entire unit through this rigid structure, causing resonance. This vibration not only increases noise (typically reaching 55-65 dB) but can also adversely affect other components of the air conditioner (such as circuit boards and the casing), shortening the product's lifespan. Furthermore, vibration can lead to unstable air conditioner operation, affecting the uniformity and efficiency of airflow.

[0004] Because the motor, fan blades and other components inside the existing fan are usually rigidly fixed to the air conditioner body, the whole machine will resonate, resulting in increased fan noise and other technical problems. Therefore, this utility model studies and designs a fan vibration reduction device and an air conditioner. Utility Model Content

[0005] Therefore, this utility model provides a fan vibration damping device and an air conditioner, which can solve the technical problem in the prior art that the internal components of the fan are rigidly connected, resulting in increased fan noise.

[0006] To address the aforementioned problems, this utility model provides a fan vibration damping device, comprising: a volute, a first mounting seat on one side of the volute, a second mounting seat on the other side of the volute, a fan blade disposed inside the volute, a driving component disposed on the first mounting seat, a driving shaft of the driving component passing through the fan blade and connecting to the second mounting seat, a first vibration damping component disposed between the driving component and the first mounting seat, a second vibration damping component disposed between the driving shaft and the fan blade, and a third vibration damping component disposed between the driving shaft and the second mounting seat.

[0007] In some embodiments, the first damping component includes a first elastic element, the drive member has a plurality of legs, and the first elastic element is at least partially located between the legs and the first mounting base.

[0008] In some embodiments, the second vibration damping component includes a second inner ring, a second elastic element, and a second outer ring. The second outer ring is integrally formed with the fan blade, the second inner ring is fixedly connected to the drive shaft, and the second elastic element is located between the second outer ring and the second inner ring.

[0009] In some embodiments, the outer wall of the second inner ring is provided with a plurality of first protrusions, the plurality of first protrusions are arranged at intervals along the second inner ring, the first protrusions extend along the length direction of the drive shaft, and the inner wall of the second elastic member is provided with a plurality of first grooves, the first grooves being arranged in a one-to-one correspondence with the first protrusions.

[0010] In some embodiments, the outer wall of the second elastic member is provided with a second groove, and the inner wall of the second outer ring is provided with a second protrusion, the second groove matching the second protrusion.

[0011] In some embodiments, the second elastic element is made of nitrile rubber, and the second outer ring and the second inner ring are made of aluminum alloy.

[0012] In some embodiments, the third vibration damping component includes a first outer ring, a third elastic element, and a first inner ring. The first outer ring is connected to the second mounting base, the first inner ring is connected to the drive shaft, and the third elastic element is located between the first inner ring and the first outer ring.

[0013] In some embodiments, the first outer ring is an injection molded part, the first outer ring is fixedly connected to the second mounting base, and the third elastic element is fixedly connected to the first inner ring.

[0014] In some embodiments, the first inner ring is made of POM material, and the first outer ring is made of ABS or PA66 injection molding material.

[0015] This utility model also provides an air conditioner that includes the aforementioned fan vibration damping device.

[0016] The fan vibration damping device and air conditioner provided by this utility model have the following beneficial effects: The first vibration damping component absorbs the high-frequency vibration generated during motor operation, the second vibration damping component absorbs the medium-frequency vibration during fan blade rotation and improves structural strength, and the third vibration damping component absorbs the low-frequency vibration at the motor shaft end. The synergistic effect of the first, second and third vibration damping components can effectively isolate the vibration sources of the motor, shaft end and fan blade, and significantly reduce the vibration and noise of the whole machine. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the fan vibration damping device of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the fan vibration damping device of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the fan vibration damping device of this utility model. Figure 3 ; Figure 4 This is an exploded view of the fan vibration damping device of this utility model; Figure 5 This is a schematic diagram of the three-stage vibration damping component in the wind turbine vibration damping device of this utility model; Figure 6 This is a schematic diagram of the secondary vibration damping component in the fan vibration damping device of this utility model; Figure 7 This is a schematic diagram of the structure of the primary vibration damping component in the fan vibration damping device of this utility model; Figure 8 This is an exploded view of the three-stage vibration damping components in the wind turbine vibration damping device of this utility model; Figure 9 This is an exploded view of the secondary vibration damping component in the wind turbine vibration damping device of this utility model.

[0019] The attached figures are labeled as follows: 1. First vibration damping component; 2. Second vibration damping component; 3. Third vibration damping component; 4. Second mounting base; 5. Drive shaft; 6. Drive component; 7. First mounting base; 8. Support leg; 9. First elastic element; 10. Fan blade; 11. First outer ring; 12. Third elastic element; 13. First inner ring; 14. Second inner ring; 15. Second elastic element; 16. Second outer ring. Detailed Implementation

[0020] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0022] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0023] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0024] See also Figure 1-9As shown in the embodiment of this utility model, a fan vibration damping device is provided, comprising: a volute, a first mounting seat 7 on one side of the volute, a second mounting seat 4 on the other side of the volute, a fan blade 10 disposed inside the volute, a driving member 6 disposed on the first mounting seat 7, a driving shaft 5 of the driving member 6 passing through the fan blade 10 and connecting to the second mounting seat 4, a first vibration damping component 1 disposed between the driving member 6 and the first mounting seat 7, a second vibration damping component 2 disposed between the driving shaft 5 and the fan blade 10, and a third vibration damping component 3 disposed between the driving shaft 5 and the second mounting seat 4.

[0025] In this technical solution, the first vibration damping component 1 absorbs the high-frequency vibration generated during motor operation, the second vibration damping component 2 absorbs the medium-frequency vibration during fan blade rotation and improves structural strength, and the third vibration damping component 3 absorbs the low-frequency vibration at the motor shaft end. The synergistic effect of the first vibration damping component 1, the second vibration damping component 2 and the third vibration damping component 3 can effectively isolate the vibration sources of the motor, shaft end and fan blade, and significantly reduce the vibration and noise of the whole machine.

[0026] In some embodiments, the first damping component 1 includes a first elastic element 9, and the drive element 6 has a plurality of legs 8, with the first elastic element 9 at least partially located between the legs 8 and the first mounting base 7.

[0027] In some embodiments, the first elastic element 9 can be configured as U-shaped, and the support leg 8 is inserted into the first elastic element 9 so that both sides of the support leg 8 have the first elastic element 9. The screw passes through the first elastic element 9, the support leg 8 and the first elastic element 9 in sequence and is connected to the first mounting base 7.

[0028] In some embodiments, the first elastic element 9 is made of silicone rubber or polyurethane rubber with a Shore hardness of A40-A60, exhibiting good temperature resistance and elasticity. The installation method involves snapping the first elastic element 9 into the motor's support leg 8, ensuring tight contact between the motor bottom and the rubber ring. The first elastic element 9 absorbs high-frequency vibrations generated during motor operation through its high elasticity and damping characteristics, reducing the transmission of vibrations to the first mounting base 7. The first elastic element 9 is used to absorb the vibration energy generated during motor operation.

[0029] In some embodiments, the second vibration damping component 2 includes a second inner ring 14, a second elastic element 15, and a second outer ring 16. The second outer ring 16 is integrally formed with the fan blade 10, the second inner ring 14 is fixedly connected to the drive shaft 5, and the second elastic element 15 is located between the second outer ring 16 and the second inner ring 14.

[0030] In the design presented in this book, the second inner ring 14 is rigidly connected to the motor shaft, and the second outer ring 16 is rigidly connected to the fan blade 5, thereby enhancing the structural strength of the fan blade 5 and the motor shaft. The high damping characteristics of the second elastic element 15 absorb the mid-frequency vibrations during the rotation of the fan blade 5, reducing the transmission of vibrations to the entire machine. During packaging drops or transportation, the second vibration damping component 2 effectively disperses the impact force, preventing the fan blade 5 from colliding and breaking with the air duct.

[0031] In some embodiments, the outer wall of the second inner ring 14 is provided with a plurality of first protrusions, the plurality of first protrusions are arranged at intervals along the second inner ring 14, the first protrusions extend along the length direction of the drive shaft 5, and the inner wall of the second elastic member 15 is provided with a plurality of first grooves, the first grooves being arranged in a one-to-one correspondence with the first protrusions.

[0032] In some embodiments, the first groove extends through the second elastic member 15 along the length of the drive shaft 5.

[0033] In some embodiments, the outer wall of the second elastic member 15 is provided with a second groove, and the inner wall of the second outer ring 16 is provided with a second protrusion, and the second groove matches the second protrusion.

[0034] In some embodiments, the second groove extends through the second outer ring 16 along the length direction of the drive shaft 5, and the second protrusion extends along the length direction of the drive shaft 5.

[0035] In some embodiments, the second elastic element 15 is made of nitrile rubber, and the second outer ring 16 and the second inner ring 14 are made of aluminum alloy.

[0036] In this technical solution, the second vibration damping component 2 consists of a second outer ring 16, a second inner ring 14, and a second elastic element 15. The second outer ring 16 and the second inner ring 14 are made of aluminum, and the second elastic element 15 is made of nitrile rubber, fixed by adhesive. The second outer ring 16 and the second inner ring 14 are made of aluminum alloy such as 6061-T6, which has lightweight and high thermal conductivity. The second elastic element 15 is made of nitrile rubber (NBR), which has excellent wear resistance and oil resistance. The second outer ring 16 is integrally injection molded with the fan blade 5, absorbing the mid-frequency vibration during fan blade rotation, improving structural strength and vibration damping performance. The second inner ring 14 is fixed to the motor shaft, and the second elastic element 15 is sandwiched between the two. The dimensions of the second outer ring 16 and the second inner ring 14 need to match the fan blade 5 and the motor shaft, and the thickness of the second elastic element 15 is 2-4mm. During installation, after the secondary vibration damping component 2 is integrally injection molded with the fan blade 5, it is installed on the motor shaft.

[0037] The wind turbine vibration damping device of this invention achieves frequency-division vibration damping by means of the synergistic effect of three vibration damping components, which respectively damp high-frequency, medium-frequency and low-frequency vibrations.

[0038] In some embodiments, the third vibration damping component 3 includes a first outer ring 11, a third elastic element 12, and a first inner ring 13. The first outer ring 11 is connected to the second mounting base 4, the first inner ring 13 is connected to the drive shaft 5, and the third elastic element 12 is located between the first inner ring 13 and the first outer ring 11.

[0039] In this technical solution, the third vibration damping component 3 absorbs low-frequency vibrations such as radial and axial vibrations at the motor shaft end through the high damping characteristics of the third elastic element 12, further reducing the transmission of vibration to the whole machine.

[0040] In some embodiments, the first outer ring 11 is an injection molded part, the first outer ring 11 is fixedly connected to the second mounting base 4, and the third elastic element 12 is fixedly connected to the first inner ring 13.

[0041] In some embodiments, the drive shaft 5 passes through the first inner ring 13, and a sliding bearing structure is formed between the first outer ring 11, the third elastic member 12, and the first inner ring 13. Specifically, the first inner ring 13 is a sliding bearing structure, and the outer ring of the sliding bearing structure is fixedly connected to the third elastic member 12; or, a sliding bearing structure is formed between the first outer ring 11 and the third elastic member 12, that is, the third elastic member 12 is the inner ring of the sliding bearing structure, and the first outer ring 11 is the outer ring of the sliding bearing structure.

[0042] This utility model's fan vibration damping device can solve the problem of vibration generated by the motor during operation being transmitted to the entire machine through rigid connections, leading to increased overall machine vibration and noise. The first elastic element 9 absorbs high-frequency vibration from the motor during operation, reducing the transmission of vibration to the mounting base. It also solves the problem of vibration from the motor shaft end being transmitted to the entire machine through injection-molded parts, further exacerbating vibration and noise. The third elastic element 12 absorbs low-frequency vibration from the motor shaft end, reducing the transmission of vibration to the entire machine. It can also solve the problem of mid-frequency vibration generated by the large fan blades during rotation, as well as damage or deformation of the fan blades caused by collisions between the fan blades and the duct during packaging drops or transportation. The second elastic element 15 absorbs mid-frequency vibration during fan blade rotation, while the integrated injection molding enhances the connection strength between the fan blades and the motor shaft, preventing collision damage. It also solves the problem of vibration and noise coupling, leading to poor overall machine stability and a degraded user experience. Through these three damping components, which respectively dampen high-frequency, mid-frequency, and low-frequency vibrations, the coupling effect of vibration and noise is significantly reduced.

[0043] During transportation and storage, air conditioners may be impacted by dropping their packaging, causing the large fan blades to collide with the air duct, resulting in damage or deformation of the blades and further affecting the performance and lifespan of the air conditioner. Although some technologies have been developed to address fan vibration issues, such as by adding support structures or optimizing fan blade design, these methods often have limited effectiveness and may increase manufacturing costs or assembly complexity. Therefore, effectively reducing fan vibration and noise while improving structural strength and impact resistance remains a pressing technical challenge.

[0044] This utility model's fan vibration damping device, verified through simulation experiments, reduces the overall machine vibration amplitude from 0.3-0.4mm to 0.15-0.2mm through three damping components, a reduction of over 50%. Noise is further reduced: overall machine noise is reduced from 55-58dB to 45-47dB, a reduction of 10-13dB. The fan blades' impact resistance is significantly enhanced, improving operational stability: the three damping components effectively isolate the vibration source, preventing vibration transmission to the entire machine, significantly improving the air conditioner's operational stability. Service life is extended: by reducing the impact of vibration on the machine's components, the service life of the air conditioner is extended.

[0045] In some embodiments, the first inner ring 13 is made of POM material, and the first outer ring 11 is made of ABS or PA66 injection molding material.

[0046] In this technical solution, the first inner ring 13 is made of POM material and fixed to the motor shaft, while the first outer ring 11 is an injection-molded part fixed to the entire machine. The first inner ring 13, made of POM material, has high rigidity and wear resistance, making it suitable for fixing to the motor shaft end. The first outer ring 11 is made of ABS or PA66 injection-molded material, providing good dimensional stability and impact resistance. The third elastic element 12 is made of butyl rubber or polyurethane rubber, providing high damping characteristics. During installation, the first inner ring 13 is fixed to the motor shaft end, and the first outer ring 11 is fixed in the mounting hole of the injection-molded part.

[0047] Example 1 An experiment was conducted on a cabinet-type air conditioner, and the experimental parameters are as follows: Motor power: 100W.

[0048] Fan diameter: 400mm.

[0049] Fan thickness: 200mm.

[0050] Experimental results Vibration amplitude test: Without the vibration damping device of this utility model installed, the vibration amplitude of the whole machine is 0.3mm.

[0051] After installing the fan vibration damping device of this utility model, the vibration amplitude of the whole machine is reduced to 0.15mm.

[0052] Noise test: Without the fan vibration damping device of this utility model installed, the noise level of the entire machine is 55dB.

[0053] After installing the fan vibration damping device of this utility model, the noise of the whole machine is reduced to 45dB.

[0054] This utility model also provides an air conditioner, including the above-mentioned fan vibration damping device.

[0055] The air conditioner of this utility model is preferably a cabinet-type air conditioner.

[0056] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A fan vibration damping device, characterized in that: include: A volute has a first mounting base (7) on one side and a second mounting base (4) on the other side. A fan blade (10) is disposed inside the volute. A drive member (6) is disposed on the first mounting base (7). The drive shaft (5) of the drive member (6) passes through the fan blade (10) and connects to the second mounting base (4). A first vibration damping component (1) is disposed between the drive member (6) and the first mounting base (7). A second vibration damping component (2) is disposed between the drive shaft (5) and the fan blade (10). A third vibration damping component (3) is disposed between the drive shaft (5) and the second mounting base (4).

2. The fan vibration damping device according to claim 1, characterized in that: The first vibration damping component (1) includes a first elastic element (9), and the drive element (6) has a plurality of legs (8), with the first elastic element (9) located at least partially between the legs (8) and the first mounting base (7).

3. The fan vibration damping device according to claim 1, characterized in that: The second vibration damping component (2) includes a second inner ring (14), a second elastic element (15), and a second outer ring (16). The second outer ring (16) is integrally formed with the fan blade (10). The second inner ring (14) is fixedly connected to the drive shaft (5). The second elastic element (15) is located between the second outer ring (16) and the second inner ring (14).

4. The fan vibration damping device according to claim 3, characterized in that: The outer wall of the second inner ring (14) is provided with a plurality of first protrusions, the plurality of first protrusions are arranged at intervals along the second inner ring (14), the first protrusions extend along the length direction of the drive shaft (5), the inner wall of the second elastic member (15) is provided with a plurality of first grooves, the first grooves are arranged in a one-to-one correspondence with the first protrusions.

5. The fan vibration damping device according to claim 3, characterized in that: The outer wall of the second elastic member (15) is provided with a second groove, and the inner wall of the second outer ring (16) is provided with a second protrusion. The second groove matches the second protrusion.

6. The fan vibration damping device according to claim 3, characterized in that: The second elastic element (15) is made of nitrile rubber, and the second outer ring (16) and the second inner ring (14) are made of aluminum alloy.

7. The fan vibration damping device according to claim 1, characterized in that: The third vibration damping component (3) includes a first outer ring (11), a third elastic element (12) and a first inner ring (13). The first outer ring (11) is connected to the second mounting base (4), the first inner ring (13) is connected to the drive shaft (5), and the third elastic element (12) is located between the first inner ring (13) and the first outer ring (11).

8. The fan vibration damping device according to claim 7, characterized in that: The first outer ring (11) is an injection molded part. The first outer ring (11) is fixedly connected to the second mounting base (4). The third elastic element (12) is fixedly connected to the first inner ring (13).

9. The fan vibration damping device according to claim 7, characterized in that: The first inner ring (13) is made of POM material, and the first outer ring (11) is made of ABS or PA66 injection molding material.

10. An air conditioner, characterized in that: The wind turbine vibration damping device includes any one of claims 1-9.

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