A fan blade damping assembly, a fan assembly, an upper air outlet outdoor unit and an air conditioner

Abstract

The application provides a fan blade damping assembly, a fan assembly, an upper air outlet outdoor unit and an air conditioner, and belongs to the technical field of fans. The fan blade damping assembly is used for connecting a fan blade and a driving shaft and comprises a first shaft sleeve, a damping sleeve and a second shaft sleeve. The first shaft sleeve and the damping sleeve are embedded in the second shaft sleeve, the damping sleeve is located between the first shaft sleeve and the second shaft sleeve, the first shaft sleeve is used for being connected with the driving shaft, the second shaft sleeve is used for being connected with a fan blade connecting piece, and the driving shaft transmits torque to the fan blade through the first shaft sleeve, the damping sleeve and the second shaft sleeve. The application can reduce the transmission of vibration between the fan blade and the driving shaft of the electric appliance, thereby reducing the vibration and noise of the fan and improving the stability of the operation of the fan.

Description

TECHNICAL FIELD

[0001] The present application relates to the fan technical field, especially to a fan blade vibration reduction assembly, fan assembly, top air outlet outdoor unit and air conditioner. BACKGROUND

[0002] With the fierce competition of products, the cost reduction requirement is also higher and higher, and the air conditioning system problem is more and more, and the noise problem is more frequent. Because of the air conditioning noise problem, it has been complained many times, and the noise requirement of quality control is more stringent than ever. The outdoor unit of the variable frequency air conditioner is mostly axial flow fan system. The axial flow fan blade is a fan blade that can produce airflow in the same direction as the fan shaft. The reason why it is called "axial flow type" is that the gas flows parallel to the fan shaft. The existing products such as electric fan and air conditioner outdoor fan are operated in axial flow mode.

[0003] The existing axial flow fan blade part includes a fan blade, a driving motor, a flow guide cover and an air outlet cover. The fan blade includes a fan blade and a fan blade shaft. The flow guide cover includes a cylindrical flow guide ring. The flow guide cover is fixedly connected with the air outlet cover. A wheel-shaped support frame is arranged in the flow guide ring. The wheel-shaped support frame includes a central part and an outer spoke. One end of the spoke is fixedly connected with the inner side of the flow guide ring. The fan blade shaft is connected with the driving motor. The driving motor is installed on the central part of the wheel-shaped support frame.

[0004] For the top air outlet outdoor unit, the fan blade is made of plastic material. The fan blade and the motor shaft are assembled into one body through bolts. The motor and the grid are assembled together through four screws. The entire fan system is fixed on the condenser through screws.

[0005] The top air outlet structure has a special structure. The grid is made of plastic material and has small stiffness. It is easy to cause resonance. As the only supporting structure of the fan system, the vibration energy of the entire fan system is transmitted to the grid. The vibration energy of the grid is transmitted to the entire machine body through the condenser. Therefore, the generated low-frequency radiation noise is very large, and the noise value is also high, which exceeds the existing standard. It is a difficult point in the current industry. For this problem, long-term research and testing have been carried out. At present, the vibration noise of the fan blade and the motor is the optimal level. It is difficult to greatly improve the vibration and noise reduction effect from the perspective of the fan blade and the motor. SUMMARY

[0006] In view of this, the present application provides a fan blade vibration reduction assembly, fan assembly, top air outlet outdoor unit and air conditioner, at least for solving the technical problem of large fan vibration in the prior art. Specifically:

[0007] In a first aspect, the present application provides a fan blade vibration reduction assembly for connecting a fan blade and a driving shaft, comprising: a first shaft sleeve, a vibration reduction sleeve and a second shaft sleeve,

[0008] The first shaft sleeve and the damping sleeve are embedded in the second shaft sleeve, and the damping sleeve is located between the first shaft sleeve and the second shaft sleeve,

[0009] The first shaft sleeve is used for being connected with the driving shaft, the second shaft sleeve is used for being connected with the fan blade connecting piece, and the driving shaft transmits torque to the fan blade through the first shaft sleeve, the damping sleeve and the second shaft sleeve.

[0010] Further, an outer wall surface of the first shaft sleeve is a conical surface,

[0011] The damping sleeve and the second shaft sleeve are both conical cylinder structures,

[0012] The mounting hole of the fan blade is a conical hole,

[0013] The first shaft sleeve, the damping sleeve, the second shaft sleeve and the mounting hole of the fan blade form a taper self-locking structure in the axial direction.

[0014] Further, a key and groove matching structure is formed between the first shaft sleeve and the damping sleeve, between the damping sleeve and the second shaft sleeve, and between the second shaft sleeve and the mounting hole, and torque is transmitted through the key and groove matching structure.

[0015] Further, the first shaft sleeve and the second shaft sleeve are made of a rigid material,

[0016] The damping sleeve is made of a plastic material.

[0017] Further, the fan blade damping assembly is used for an updraft fan system.

[0018] In a second aspect, the application provides a fan assembly, comprising a fan blade and a motor, wherein the fan blade is connected with a driving shaft of the motor through the above-mentioned fan blade damping assembly.

[0019] In a third aspect, the application provides an updraft outdoor unit, comprising:

[0020] An updraft grille is provided with a motor supporting leg;

[0021] A motor is installed on the motor supporting leg;

[0022] A fan blade is connected with a driving shaft of the motor through the above-mentioned fan blade damping assembly.

[0023] Further, the motor supporting leg comprises a damping installation leg,

[0024] The damping installation leg comprises a connecting plate and a supporting plate, a first end of the connecting plate is connected with the updraft grille, a second end of the connecting plate is connected with the supporting plate, and the supporting plate is used for supporting the installation leg of the motor.

[0025] The support plate is provided with a limiting column for limiting the mounting leg.

[0026] Further, the limiting column is provided with a damping pad for supporting the mounting leg.

[0027] The damping pad is a cylindrical structure with a corrugated wall.

[0028] Further, the first end of the damping pad abuts against the support plate, and the second end of the damping pad is formed with a clamping groove for clamping the mounting leg.

[0029] Further, the damping mounting leg further comprises side plates, two of which are arranged on the two sides of the connecting plate, and the side plates are connected with the upper air outlet grille, the connecting plate and the support plate.

[0030] One of the side plates is provided with an opening for the mounting leg to pass through.

[0031] Further, a plurality of damping mounting legs are arranged on the same circumference.

[0032] Further, the motor mounting leg further comprises a fixed mounting leg for being connected with the mounting leg of the motor through a connecting piece.

[0033] In the fourth aspect, the present application provides an air conditioner comprising the above-mentioned upper air outlet outdoor unit.

[0034] The fan blade damping assembly is arranged between the fan blade and the driving shaft, so that the vibration transmission between the fan blade and the driving shaft of the electric appliance is reduced, the vibration and noise of the fan are reduced, and the stability of the fan operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. The drawings described below are only some embodiments of the present disclosure, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0036] Figure 1 Fig. 1 shows a schematic diagram of a fan blade damping assembly in a disassembled state according to an embodiment of the present application;

[0037] Figure 2 Fig. 2 shows a schematic diagram of a cross section of the fan blade damping assembly assembled on a fan according to an embodiment of the present application;

[0038] Figure 3Fig. 2 shows a schematic view of the fan and the upper air outlet grille in a disassembled state according to an embodiment of the present application;

[0039] Figure 4 Fig. 3 shows a schematic view of the structure of the upper air outlet grille according to an embodiment of the present application;

[0040] Figure 5 Fig. 4 shows a schematic view of the fan according to an embodiment of the present application; Figure 4 Fig. 5 shows an enlarged view of part A in Fig. 4;

[0041] Figure 6 Fig. 6 shows a schematic view of the upper air outlet grille and the fan in an assembled state according to an embodiment of the present application;

[0042] Figure 7 Fig. 7 shows a schematic view of the structure of the damping pad according to an embodiment of the present application.

[0043] Fig. 1 shows a schematic view of the fan according to an embodiment of the present application;

[0044] 10, first shaft sleeve; 11, first key; 20, second shaft sleeve; 21, second key; 22, third key groove; 30, damping sleeve; 31, third key; 32, first key groove; 40, fan blade; 50, motor; 51, locking nut; 52, mounting leg; 60, upper air outlet grille; 61, damping mounting leg; 611, connecting plate; 612, support plate; 613, limiting column; 614, side plate; 615, notch; 62, fixed mounting leg; 70, damping pad. DETAILED DESCRIPTION

[0045] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] The terms used in the embodiments of the present application are merely for the purpose of describing particular embodiments and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two, but does not exclude the case of including at least one.

[0047] It should be understood that the term "and / or" used herein merely describes an association relationship of associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0048] It is also important to note that the terms "comprises" and / or "comprising," or other variations thereof, are intended to cover a non-exclusive inclusion such that a product or process that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such product or process. An element proceeded by "comprises a" does not, without more constraints, exclude the presence of additional identical elements in the process or product that comprises the element.

[0049] The fan blade damping assembly of the present application can reduce the vibration transmission between the fan blade and the driving shaft of the electric appliance, thereby reducing the vibration and noise of the fan. Meanwhile, the damping pad supports the mounting foot of the motor, reducing the vibration of the fan transmitted to the upper air outlet grille, thereby controlling the vibration of the outdoor unit, reducing the noise of the outdoor unit, and improving the assembly efficiency through structural arrangement. The present application will be described in detail below in combination with specific embodiments:

[0050] As shown in Figure 1 , Figure 2 The present application provides a fan blade damping assembly for connecting the fan blade 40 and the driving shaft, comprising: a first shaft sleeve 10, a damping sleeve 30 and a second shaft sleeve 20, the first shaft sleeve 10 and the damping sleeve 30 are embedded in the second shaft sleeve 20, the damping sleeve 30 is located between the first shaft sleeve 10 and the second shaft sleeve 20, the first shaft sleeve 10 is used for connecting with the driving shaft, the second shaft sleeve 20 is used for connecting with the fan blade 40, and the driving shaft transmits torque to the fan blade 40 through the first shaft sleeve 10, the damping sleeve 30 and the second shaft sleeve 20.

[0051] Preferably, the outer wall surface of the first shaft sleeve 10 is a conical surface, the damping sleeve 30 and the second shaft sleeve 20 are both conical cylinder structures, and the mounting hole of the fan blade 40 is a conical hole. The first shaft sleeve 10, the damping sleeve 30, the second shaft sleeve 20 and the mounting hole of the fan blade 40 form a taper locking structure in the axial direction. During assembly, the first shaft sleeve 10, the damping sleeve 30 and the second shaft sleeve 20 can be assembled together first, and then assembled as a whole to the fan blade 40, thereby simplifying the structure of the fan blade damping assembly and improving the assembly efficiency. Further preferably, the lengths of the first shaft sleeve 10, the damping sleeve 30 and the second shaft sleeve 20 are the same, and after assembly, the two ends of the three are flush, and after assembly, the three are fitted into the mounting hole of the fan blade 40 and flush with the end of the mounting hole of the fan blade 40.

[0052] Key and slot matching structures are formed between the first shaft sleeve 10 and the damping sleeve 30, between the damping sleeve 30 and the second shaft sleeve 20, and between the second shaft sleeve 20 and the mounting hole, and torque is transmitted through the key and slot matching structures.

[0053] Further, the inner wall surface of the first shaft sleeve 10 is a D-shaped cylindrical surface to match the shape of the driving shaft of the motor 50 and to transmit torque, and the outer wall surface is a conical surface, and a plurality of first keys 11 are arranged on the outer wall surface, preferably, the plurality of first keys 11 extend along the length direction of the outer wall surface of the first shaft sleeve 10 and are distributed along the circumference of the outer wall surface of the first shaft sleeve 10, preferably, four are uniformly distributed. Further preferably, the plurality of first keys 11 can be arranged staggered in the axial direction of the first shaft sleeve 10, and can also be located on the same circumference.

[0054] A plurality of first key grooves 32 corresponding to the positions and numbers of the first keys 11 are arranged on the inner wall surface of the damping sleeve 30, and after the damping sleeve 30 is assembled with the first shaft sleeve 10, each first key 11 is embedded in a first key groove 32 to form a key-groove fit, and torque is transmitted through the key-groove fit.

[0055] A plurality of second keys 21 are arranged on the outer wall surface of the second shaft sleeve 20, preferably, the plurality of second keys 21 extend along the length direction of the outer wall surface of the second shaft sleeve 20 and are distributed along the circumference of the outer wall surface of the second shaft sleeve 20, preferably, four are uniformly distributed. Further preferably, the plurality of second keys 21 can be arranged staggered in the axial direction of the second shaft sleeve 20, and can also be located on the same circumference. Correspondingly, a second key groove is arranged in the mounting hole of the fan blade 40, and after the second shaft sleeve 20 is assembled with the mounting hole, each second key 21 is embedded in a second key groove to form a key-groove fit, and torque is transmitted through the key-groove fit.

[0056] A plurality of third keys 31 are arranged on the outer wall surface of the damping sleeve 30, preferably, the plurality of third keys 31 extend along the length direction of the outer wall surface of the damping sleeve 30 and are distributed along the circumference of the outer wall surface of the damping sleeve 30, preferably, four are uniformly distributed. Further preferably, the plurality of third keys 31 can be arranged staggered in the axial direction of the damping sleeve 30, and can also be located on the same circumference. Correspondingly, a third key groove 22 is arranged on the inner wall surface of the second shaft sleeve 20, and after the second shaft sleeve 20 is assembled with the damping sleeve 30, each third key 31 is embedded in a third key groove 22 to form a key-groove fit, and torque is transmitted through the key-groove fit.

[0057] Preferably, the first shaft sleeve 10 and the second shaft sleeve 20 are made of a rigid material, for example, can be made of steel, to ensure that torque can be effectively transmitted; the damping sleeve 30 is made of a plastic material, for example, is made of rubber material, preferably, is made of ethylene-propylene-diene rubber or nitrile rubber, which can transmit torque while also reducing or eliminating the transmission of vibration between the fan blade 40 and the output shaft of the motor 50 through its deformation.

[0058] The fan blade damping assembly provided by the application is installed as follows: first, the first shaft sleeve 10, the damping sleeve 30 and the second shaft sleeve 20 are assembled, then the whole is installed into the mounting hole of the fan blade 40, then the driving shaft of the electric appliance passes through the first shaft sleeve 10 and is connected with the locking nut 51, and the assembly of the fan blade 40 is completed.

[0059] The application further provides a fan assembly comprising a fan blade and a motor, wherein the fan blade is connected with the driving shaft of the motor through the fan blade damping assembly.

[0060] As shown in Figure 3 , Figure 4 , the application further provides an upper air outlet outdoor unit, which comprises an upper air outlet grille 60 arranged at the top air outlet of a machine body, a motor support leg arranged on the upper air outlet grille 60, and a fan installed on the upper air outlet grille 60; a motor 50 installed on the motor support leg; and a fan blade 40 connected with the driving shaft of the motor 50 through the fan blade damping assembly. Preferably, a damping pad 70 is arranged on the motor support leg, and the damping pad 70 and the fan blade damping assembly constitute a two-stage damping mechanism, which can greatly reduce the vibration transmitted to the upper air outlet grille 60 when the fan is running and simultaneously reduce the noise generated by the vibration.

[0061] As shown in Figure 4 , Figure 5 , Figure 6 , the motor support leg comprises a damping mounting leg 61, which comprises a connecting plate 611 and a supporting plate 612. The first end of the connecting plate 611 is connected with the upper air outlet grille 60, and the second end of the connecting plate 611 is connected with the supporting plate 612. The supporting plate 612 is used for supporting the mounting leg 52 of the motor 50, and a limiting column 613 is arranged on the supporting plate 612 to limit the mounting leg 52. Preferably, the supporting plate 612 is arranged perpendicularly to the connecting plate 611 to form an L-shaped structure, the limiting column 613 is arranged on the upper side of the supporting plate 612 and arranged perpendicularly to the supporting plate 612, and a through hole is arranged on the mounting leg 52 of the motor 50, so that the mounting leg 52 of the motor 50 is hung on the supporting plate 612 and the through hole is sleeved on the limiting column 613.

[0062] Preferably, the damping mounting leg 61 further comprises a side plate 614, the side plate 614 comprises two, which are respectively arranged on both sides of the connecting plate 611, and the side plate 614 is connected with the upper air outlet grille 60, the connecting plate 611 and the supporting plate 612, wherein an opening 615 is arranged on one side plate 614, the opening 615 is used for mounting the mounting leg 52, when the motor 50 is mounted, the mounting leg 52 is aligned with the opening 615, and the motor 50 is rotated to make the mounting leg 52 rotate to between the two side plates 614, and then the motor 50 is lowered to be hung on the limiting column 613. Further, the damping mounting leg 61 is constructed as an integral structure and is integrally formed with the upper air outlet grille 60, so as to improve the structural strength, and in addition, the arrangement of the two side plates 614 plays a protection role, and can reduce the risk of the mounting leg 52 falling off from the damping mounting leg 61. The mounting leg is provided with a plurality of damping mounting legs 61, and the plurality of damping mounting legs 61 are distributed on the same circumference, and the specific number is matched with the number of the mounting legs 52 of the motor 50. Preferably, the motor leg further comprises a fixed mounting leg 62, which is used for being connected with the mounting leg 52 of the motor 50 through a connecting piece, and in the embodiment, the fixed mounting leg 62 comprises a threaded hole arranged on the upper air outlet grille 60, which is used for mounting a screw. Specifically, the motor leg comprises three damping mounting legs 61 and one fixed mounting leg 62, which are arranged at four corners of the square, respectively. The motor 50 is uniformly distributed with four mounting legs 52, and when the motor 50 is mounted, three mounting legs 52 of the motor 50 are hung on the damping mounting leg 61, and one mounting leg 52 is connected with the fixed mounting leg 62 through a screw, so as to avoid the motor 50 from falling off from the motor leg.

[0063] The limiting column 613 is provided with a damping pad 70, as shown in Figure 6 、 Figure 7 The damping pad 70 is used for supporting the mounting leg 52, so as to absorb the vibration generated when the motor 50 operates. Preferably, the damping pad 70 is a cylindrical structure with a corrugated wall, the first end of the damping pad 70 abuts against the supporting plate 612, and the second end of the damping pad 70 is formed with a clamping groove, and the clamping groove is clamped with the mounting leg 52.

[0064] Preferably, the upper air outlet grille 60 is further provided with a wiring slot, the wiring slot is communicated with the area where the motor leg is located, and is used for mounting the power supply and control circuit of the motor 50.

[0065] Through the comparison noise test of the original structure and the present application, the data shows that the total noise value of the present application is reduced by 2.1db, the noise peak value is reduced by 2.3db, the noise peak value is also reduced, the low-frequency humming sound is improved, and the sound quality effect is significantly improved.

[0066] The present application also provides an air conditioner, which comprises the above-mentioned upper air outlet outdoor unit and an indoor unit.

[0067] The present application sets a wind blade damping component between the wind blade and the driving shaft, and sets a damping pad 70 on the motor support foot to form secondary damping, thereby effectively reducing the vibration of the outdoor unit, reducing the noise, and improving the assembly efficiency of the whole machine.

[0068] The exemplary embodiments of the present disclosure are specifically shown and described above. It should be understood that the present disclosure is not limited to the detailed structure, arrangement or implementation method described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements within the spirit and scope of the appended claims.

Claims

1. An outdoor unit with an air outlet on top, characterized in that, The upper air outlet grille and the fan assembly are included. A motor support foot is arranged on the upper air outlet grille. The fan assembly includes a motor and a fan blade, and the motor is installed on the motor support foot. The fan blade is connected with the driving shaft of the motor through a fan blade damping assembly. Wherein, The fan blade damping assembly includes a first shaft sleeve, a damping sleeve and a second shaft sleeve, The first shaft sleeve and the damping sleeve are embedded in the second shaft sleeve, and the damping sleeve is located between the first shaft sleeve and the second shaft sleeve, The first shaft sleeve is used to connect with the driving shaft of the motor, the second shaft sleeve is used to connect with the fan blade connector, and the driving shaft transmits torque to the fan blade through the first shaft sleeve, damping sleeve and second shaft sleeve; The motor support foot includes a damping installation foot, the damping installation foot includes a connecting plate and a supporting plate, the first end of the connecting plate is connected with the upper air outlet grille, the second end of the connecting plate is connected with the supporting plate, and the supporting plate is used to support the installation foot of the motor; A limiting column is arranged on the supporting plate to limit the installation foot, a damping pad is arranged on the limiting column, the first end of the damping pad abuts against the supporting plate, the second end of the damping pad is formed with a clamping groove, and the clamping groove is clamped with the installation foot; The damping installation foot further includes a side plate, the side plate is two, the two side plates are oppositely arranged on both sides of the connecting plate, and the two side plates are connected with the upper air outlet grille, the connecting plate and the supporting plate at the same time, an opening is arranged on one side plate, and the opening is used for the installation foot of the motor to pass through.

2. The upper air outlet unit according to claim 1, wherein The outer wall surface of the first shaft sleeve is a conical surface; The damping sleeve and the second shaft sleeve are both conical cylinder structures; The mounting hole of the fan blade is a conical hole; The first shaft sleeve, the damping sleeve, the second shaft sleeve and the mounting hole of the fan blade form a taper self-locking structure in the axial direction. Key and groove matching structures are formed between the first shaft sleeve and the damping sleeve, between the damping sleeve and the second shaft sleeve, and between the second shaft sleeve and the mounting hole, and torque is transmitted through the key and groove matching structures.

3. The outdoor unit according to claim 2, wherein The first shaft sleeve and the second shaft sleeve are made of rigid material, 4. The outdoor unit according to any one of claims 1 to 3, wherein The damping sleeve is made of plastic material. The damping pad is a cylindrical structure with a corrugated wall structure.

5. The outdoor unit according to any one of claims 1 to 3, wherein The motor support foot further includes a fixed installation foot, which is used to connect with the installation foot of the motor through a connecting piece.

6. The outdoor unit according to any one of claims 1 to 3, wherein The damping installation foot is provided with a plurality of damping installation feet, and the plurality of damping installation feet are distributed on the same circumference.

7. The outdoor unit according to any one of claims 1 to 3, wherein The upper air outlet unit of any one of claims 1-7 is included.

8. An air conditioner characterized by comprising: ​

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