Wind wheel assembly and air conditioner

Abstract

The utility model discloses a wind wheel assembly and an air conditioner. The wind wheel assembly comprises a motor, a cross-flow wind wheel and a dustproof structure. The motor comprises a stator and a rotor, the stator is provided with a center hole, a bearing is arranged in the center hole, the rotor is arranged on one side of the stator in the axis direction, and a first gap is formed between the rotor and the stator; the cross-flow wind wheel is fixedly provided with a rotating shaft, and the rotating shaft sequentially penetrates through the rotor and the bearing. The dustproof structure is arranged between the motor and the cross-flow wind wheel and arranged on the peripheral side of the first gap in a surrounding mode. According to the wind wheel assembly and the air conditioner, at least the problems that in the prior art, a motor drives a cross-flow wind wheel to rotate unsmoothly, and the use performance of the motor is low can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, and particularly relates to an impeller assembly and an air conditioner. Background Art

[0002] At present, in order to realize the development of miniaturization of air conditioners, an external rotor permanent magnet synchronous motor is used to drive a cross-flow impeller to rotate. Among them, one side of the cross-flow impeller is provided with a shaft extension and an oil-containing bearing, and a bowl-shaped magnetic ring and a rotating shaft are installed on the end face of the other side of the impeller. The bowl-shaped end face of the magnetic ring is combined with the end face of the impeller to position and transmit torque. The inner stator iron core part of the motor extends into the inner side of the magnetic ring, and a rotating torque is generated by the interaction with the inner diameter magnetic field of the magnetic ring. The impeller shaft extends into a bearing arranged in the center of the stator to keep the center of the cross-flow impeller coincident with the center of the motor, and the motor drives the magnetic ring to drive the cross-flow impeller to rotate. The use of an external rotor permanent magnet synchronous motor for driving has a compact and simple structure, shortens the overall axial dimension, and reduces the installation space and cost; however, the bowl-shaped magnetic ring has a large volume and high cost, and the size of the inner stator winding iron core in the magnetic ring is limited and the heat dissipation of the winding is not good. In addition, when using this driving method, in the actual use process, problems such as the rotation of the cross-flow impeller driven by the motor not being smooth and the use performance of the motor decreasing are likely to occur. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide an impeller assembly and an air conditioner, which at least solve the problems that the rotation of the cross-flow impeller driven by the motor in the prior art is not smooth and the use performance of the motor is low.

[0004] According to one aspect of the utility model, an impeller assembly is provided, including:

[0005] A motor, the motor includes a stator and a rotor, the stator is provided with a central hole, a bearing is arranged in the central hole, and the rotor is arranged on one side of the stator in the axial direction and forms a first gap with the stator;

[0006] A cross-flow impeller, the cross-flow impeller is fixedly provided with a rotating shaft, and the rotating shaft sequentially passes through the rotor and the bearing;

[0007] A dust-proof structure, the dust-proof structure is arranged between the motor and the cross-flow impeller and surrounds the outer peripheral side of the first gap.

[0008] Furthermore, the dust-proof structure includes a first dust-proof ring, the first dust-proof ring is arranged at one end of the cross-flow impeller close to the motor, and the first dust-proof ring surrounds the outer peripheral side of the rotor and forms a second gap with the outer peripheral side of the rotor;

[0009] A second dust-proof ring is provided at one end of the motor close to the cross-flow impeller. The second dust-proof ring surrounds the outer peripheral side of the first gap and is inserted into the second gap along the axial direction of the motor.

[0010] Further, the second dust-proof ring is integrally formed with the stator; or,

[0011] The dust-proof structure further includes a dust-proof cover sleeved on the outer periphery of the stator, and the second dust-proof ring is provided on the dust-proof cover.

[0012] Further, an annular protrusion is provided on the dust-proof cover. The annular protrusion is provided on the outer peripheral side of the second dust-proof ring and is coaxially arranged with the second dust-proof ring, and the annular protrusion is located at the end of the first annular protrusion close to the stator.

[0013] Further, the rotor is fixed to the cross-flow impeller by at least one of injection molding, fastener connection or snap connection.

[0014] Further, the minimum width δ of the first gap satisfies the relationship: 0.4mm ≤ δ ≤ 1.0mm.

[0015] Further, the impeller assembly further includes a spacer sleeve sleeved on the outer peripheral side of the rotating shaft. Both ends of the spacer sleeve respectively abut against the cross-flow impeller and the bearing so that there is the first gap between the stator and the rotor.

[0016] Further, the impeller assembly further includes a mounting base. The stator is mounted on the first side of the mounting base through a shock pad;

[0017] A support bearing is provided on the second side of the mounting base opposite to the first side. The cross-flow impeller is rotatably mounted between the support bearing and the motor.

[0018] Further, the support bearing includes a self-aligning bearing.

[0019] On the other hand, the present invention also provides an air conditioner, which includes the above-mentioned impeller assembly.

[0020] In the present invention, since a dust-proof structure is provided between the motor and the cross-flow impeller, and the dust-proof structure surrounds the outer peripheral side of the first gap, it can effectively prevent foreign objects and dust from entering the first gap, and reduce the accumulation of dust inside the motor. In this way, the situation of jamming when the motor is working can be avoided, which can not only ensure the smooth operation of the motor, but also improve the heat dissipation effect inside the motor, thereby ensuring the use performance of the motor and prolonging the service life of the motor.

[0021] In the present application, the motor includes a stator and a rotor. The rotor is disposed on one side of the stator in the axial direction, and a first gap is formed between the rotor and the stator. Specifically, the first gap ensures that the motor can rotate. The arrangement of the axial flux motor in the present application can reduce the length of the wind wheel assembly along the axial direction of the motor, facilitating the miniaturization design of the air conditioner and ensuring the operating stability of the wind wheel assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present utility model and form a part of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0023] Figure 1 is a schematic diagram of the overall structure of the wind wheel assembly disclosed in the embodiment of the present utility model;

[0024] Figure 2 is a cross-sectional view of the wind wheel assembly disclosed in the embodiment of the present utility model;

[0025] Figure 3 is a schematic diagram of the first dust-proof structure of the wind wheel assembly disclosed in the embodiment of the present utility model;

[0026] Figure 4 is a schematic diagram of the second dust-proof structure of the wind wheel assembly disclosed in the embodiment of the present utility model;

[0027] Figure 5 is a schematic diagram of the stator on the wind wheel assembly disclosed in the embodiment of the present utility model.

[0028] Among them, the above-mentioned drawings include the following reference numerals:

[0029] 10, motor; 11, stator; 111, central hole; 112, second dust-proof ring; 12, rotor; 20, cross-flow wind wheel; 21, rotating shaft; 22, first dust-proof ring; 221, first annular protrusion; 30, dust-proof cover; 31, annular protrusion; 40, first gap; 41, second gap; 50, spacer sleeve; 60, mounting base; 70, bearing; 71, support bearing; 80, shock pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] As mentioned in the background art, currently, in order to achieve the miniaturization development of air conditioners, an outer rotor permanent magnet synchronous motor is used to drive the cross-flow impeller to rotate. However, in the actual use process, problems such as the rotation of the cross-flow impeller driven by the motor being not smooth and the use performance of the motor being low are likely to occur. For this reason, the present application proposes a wind wheel assembly, which can largely avoid the problem of unsmooth driving of the motor, and thus can improve the use performance and service life of the motor. The wind wheel assembly of the present application will be introduced in detail below with reference to the drawings.

[0034] See Figures 1 to 5 As shown, according to an embodiment of the present utility model, a wind wheel assembly is provided. Specifically, the wind wheel assembly includes a motor 10, a cross-flow impeller 20, and a dust-proof structure.

[0035] Specifically, the motor 10 includes a stator 11 and a rotor 12. The stator 11 is provided with a central hole 111, a bearing 70 is arranged in the central hole 111, the rotor 12 is arranged on one side of the stator 11 in the axial direction and forms a first gap 40 with the stator 11; the cross-flow impeller 20 is fixedly provided with a rotating shaft 21, and the rotating shaft 21 sequentially passes through the rotor 12 and the bearing 70; the dust-proof structure is arranged between the motor 10 and the cross-flow impeller 20 and surrounds the outer periphery of the first gap 40.

[0036] In this embodiment, since a dust-proof structure is provided between the motor 10 and the cross-flow impeller 20, and this dust-proof structure surrounds the outer peripheral side of the first gap 40, it can effectively prevent foreign objects and dust from the outside from entering the first gap 40, and reduce the accumulation of dust inside the motor 10. In this way, the situation of the motor 10 getting stuck during operation can be avoided, which not only ensures the smooth operation of the motor 10, but also improves the heat dissipation effect inside the motor 10, thereby ensuring the service performance of the motor 10 and extending the service life of the motor 10.

[0037] In this application, the motor 10 includes a stator 11 and a rotor 12. The rotor 12 is arranged on one side of the stator 11 in the axial direction, that is, the motor 10 in this application is an axial-flux motor. Compared with an outer-rotor motor, the volume of the axial-flux motor in this embodiment can be set smaller, and the length of the impeller assembly along the axis of the motor 10 can be reduced. At the same time, there is a first gap 40 between the rotor 12 and the stator 11, and this first gap 40 ensures that the motor 10 can rotate. And a central hole 111 is provided inside the stator 11, and a bearing 70 is provided in this central hole 111. Compared with an outer-rotor motor, only one bearing 70 can be provided in the central hole 111 of the axial-flux motor in this embodiment to stably support the rotating shaft 21, which is convenient for realizing the miniaturized design of the air conditioner and ensures the running stability of the impeller assembly.

[0038] That is to say, in this embodiment, by arranging the rotor 12 on one side of the stator 11 in the axial direction and forming a first gap 40 with the stator 11, the smooth operation of the motor 10 is ensured. A dust-proof structure is provided between the motor 10 and the rotor 12, and this dust-proof structure surrounds the outer peripheral side of the first gap 40, reducing the influence of foreign objects and dust on the motor 10, improving the service performance and service life of the motor 10, and ensuring the safety of the motor 10 during operation.

[0039] As Figures 1 to 4 shown, the dust-proof structure in this application includes a first dust-proof ring 22 and a second dust-proof ring 112. Specifically, the first dust-proof ring 22 is arranged at one end of the cross-flow impeller 20 close to the motor 10. The first dust-proof ring 22 surrounds the outer peripheral side of the rotor 12 and forms a second gap 41 between the outer peripheral side of the rotor 12; the second gap 41 can ensure that the second dust-proof ring 112 is inserted into this second gap 41, improving the dust-proof protection effect on the motor 10 and the cross-flow impeller 20. Further, the second dust-proof ring 112 is arranged at one end of the motor 10 close to the cross-flow impeller 20. The second dust-proof ring 112 surrounds the outer peripheral side of the first gap 40 and is inserted into the second gap 41 along the axial direction of the motor 10. In this way, the first dust-proof ring 22 surrounds the outer peripheral side of the second dust-proof ring 112, and the two dust-proof rings form a labyrinth protection structure, avoiding foreign objects and dust from entering the first gap 40.

[0040] In actual design, according to the size of the motor 10, the setting method of the second dust-proof ring 112 is different. Figure 3 The situation where the second dust-proof ring 112 is integrally formed with the motor 10 is shown. That is to say, when the size of the stator 11 of the motor 10 is relatively large, the outer peripheral side of the stator 11 can extend along the axial direction of the stator 11 into the second gap 41, and the second dust-proof ring 112 is integrally provided with the motor 10, reducing the manufacturing cost of the dust-proof structure. In some other embodiments, the dust-proof structure further includes a dust-proof cover 30, the dust-proof cover 30 is sleeved on the outer periphery of the motor 10, and the second dust-proof ring 112 is provided on the dust-proof cover 30. Figure 4 The situation where the dust-proof cover 30 is provided is shown. When the size of the motor 10 is relatively small, the outer peripheral side of the stator 11 of the motor 10 cannot directly extend into the second gap 41. By providing a dust-proof cover 30 on the outer peripheral side of the motor 10 as the second dust-proof ring 112, the first gap 40 between the small-sized motor 10 and the rotor 12 can be protected, preventing foreign objects and dust from entering and affecting the normal operation of the motor 10.

[0041] Furthermore, an annular protrusion 31 is provided on the dust-proof cover 30. The annular protrusion 31 is provided on the outer peripheral side of the second dust-proof ring 112 and is coaxially arranged with the second dust-proof ring 112, realizing the integral setting of the dust-proof cover 30. And the annular protrusion 31 is located at the end of the first annular protrusion 221 close to the stator 11. With such a setting, it is convenient to insert the end of the dust-proof cover 30 into the second gap 41. In addition, the first annular protrusion 221 and the dust-proof cover 30 work together to prevent dust and foreign objects from entering the first gap 40, thereby affecting the normal operating state of the motor 10.

[0042] See Figures 1 to 4 As shown, the rotor 12 is arranged on one side in the axial direction of the stator 11. Specifically, the rotor 12 is arranged on the cross-flow impeller 20. With such a setting, the installation length of the cross-flow impeller 20 and the motor 10 in the axial direction of the motor 10 can be reduced. Optionally, the rotor 12 can be fixed to the cross-flow impeller 20 by means such as injection molding, fastener connection, or snap connection. In this embodiment, it is preferably to connect the rotor 12 and the cross-flow impeller 20 by injection molding, and the rotor 12 and the cross-flow impeller 20 are integrally formed by injection molding, enhancing the stability of the installation of the rotor 12. In addition, a rotational torque is generated between the rotor 12 and the stator 11, and the torque of the rotor 12 is transmitted to the cross-flow impeller 20 to drive the cross-flow impeller 20 to rotate.

[0043] See Figure 2As shown, in the present application, the minimum width δ of the first gap 40 satisfies the relation: 0.4 mm ≤ δ ≤ 1.0 mm. Exemplarily, the value of the minimum width δ can be 0.4 mm, 0.5 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc. To ensure that the motor 10 rotates, there must be a first gap 40 between the stator 11 and the rotor 12. The size of this first gap 40 affects the performance of the motor 10. Specifically, the first gap 40 affects the power of the motor 10. When the first gap 40 is uneven, the vibration and noise generated during the operation of the motor 10 will increase, and in severe cases, it is easy to cause problems such as temperature rise and bearing 70 damage. If the first gap 40 is less than 0.4 mm, when the motor 10 operates, the eccentricity of the rotor 12 relative to the stator 11 easily causes the shaft stiffness to be affected by the unbalanced magnetic pulling force, resulting in the rotor 12 hitting the stator 11, and the problem of unreliable operation of the motor 10 occurs. In addition, when the first gap 40 is less than 0.4 mm, there is also friction and heat accumulation between the stator 11 and the rotor 12, which has a negative impact on the stability and service life of the motor 10. If the first gap 40 is greater than 1.0 mm, the magnetic field coupling between the stator 11 and the rotor 12 will weaken, easily resulting in a decrease in the efficiency and output power of the motor 10.

[0044] As Figures 2 to 4 shown, the wind wheel assembly further includes a spacer sleeve 50. The spacer sleeve 50 is sleeved on the outer peripheral side of the rotating shaft 21, and both ends of the spacer sleeve 50 respectively abut against the cross-flow wind wheel 20 and the bearing 70 so that there is a first gap 40 between the stator 11 and the rotor 12. The first gap 40 has an important influence on the performance and operating state of the motor 10. Therefore, during the actual assembly process, it is necessary to accurately control the first gap 40 between the stator 11 and the rotor 12. In this embodiment, the accurate control of the first gap 40 is achieved by using the spacer sleeve 50 to ensure that the first gap 40 is within a suitable range, which is beneficial to improving the stability of the operation of the motor 10.

[0045] Furthermore, as Figure 5 shown, the wind wheel assembly further includes a mounting base 60. The stator 11 is mounted on the first side of the mounting base 60 through a shock pad 80. The setting of the shock pad 80 can reduce the vibration transmission of the motor 10 operation to the mounting base 60 of the wind wheel assembly.

[0046] Furthermore, a support bearing 71 is provided on the second side of the mounting base 60 opposite to the first side. The cross-flow wind wheel 20 is rotatably mounted between the support bearing 71 and the motor 10. With this setting, when assembling the cross-flow wind wheel 20 and the motor 10, only need to mount the stator 11 on the mounting base 60 and fix it through the shock pad 80, and insert the cross-flow wind wheel 20 with the rotor 12 into the bearing 70. The installation is simple, and the axial volume of the wind wheel assembly is greatly reduced.

[0047] Furthermore, asFigure 2 As shown, the support bearing 71 includes a self-aligning bearing. In this embodiment, by providing a self-aligning bearing at the end of the cross-flow impeller 20 and a non-self-aligning bearing 70 at the motor 10 end, the uniformity of the first gap 40 between the end faces of the rotor 12 and the stator 11 can be ensured, and the vibration noise of the motor 10 can be reduced. At the same time, since the support bearing 71 is self-aligning, the center of the cross-flow impeller 20 is adjusted according to the center of the bearing 70 on the motor 10 side, ensuring smooth rotation of the cross-flow impeller 20, ensuring a certain coaxiality between the motor 10 and the cross-flow impeller 20, and ensuring the uniformity of the first gap 40.

[0048] As can be seen from the above embodiments, the impeller assembly of the present utility model can at least achieve the following technical effects:

[0049] (1) By providing a dust-proof structure between the cross-flow impeller and the motor in the present utility model, the dust-proof structure is a labyrinth dust-proof structure, and the dust-proof structure includes a dust-proof ring and a dust-proof cover. Among them, the dust-proof ring can be integrally provided with the stator, and a dust-proof cover can also be provided on the outer periphery of the stator. With such a setting, foreign objects or dust can be prevented from entering the first gap and having a negative impact on the performance and operating state of the motor.

[0050] On the other hand, in combination with Figures 1 to 5 As shown, the present utility model also provides an air conditioner. The air conditioner includes the above-mentioned impeller assembly. In the air conditioner, the rotor 12 and the cross-flow impeller 20 are integrally combined, with a simple and compact structure, greatly shortening the overall axial dimension of the air conditioner and realizing the miniaturization development of the air conditioner. In addition, in the impeller assembly in the air conditioner, a dust-proof structure is provided between the motor 10 and the cross-flow impeller 20, which can prevent foreign objects and dust from entering the first gap 40, ensure the normal operation of the motor 10, and extend the service life of the motor 10.

[0051] With the above settings, when the air conditioner is working, the service life of the air conditioner can be improved and the user's comfort can be further enhanced.

[0052] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0053] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0054] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A wind wheel assembly, characterized in that: include: A motor (10), the motor (10) comprising a stator (11) and a rotor (12), the stator (11) being provided with a center hole (111), a bearing (70) being provided in the center hole (111), the rotor (12) being provided on one side in an axial direction of the stator (11) and forming a first gap (40) with the stator (11); A crossflow impeller (20), wherein the crossflow impeller (20) is fixedly provided with a rotating shaft (21), and the rotating shaft (21) is sequentially passed through the rotor (12) and the bearing (70); A dustproof structure is provided between the motor (10) and the crossflow impeller (20) and is arranged around the outer circumference of the first gap (40).

2. The wind wheel assembly according to claim 1, characterized in that: The dustproof structure comprises a first dustproof ring (22), wherein the first dustproof ring (22) is arranged at one end of the crossflow impeller (20) close to the motor (10), A first dust ring (22) is disposed around the outer circumference of the rotor (12) and forms a second gap (41) with the outer circumference of the rotor (12); A second dustproof ring (112), wherein the second dustproof ring (112) is arranged at one end of the motor (10) close to the crossflow impeller (20), and the second dustproof ring (112) is arranged around the outer peripheral side of the first gap (40) and inserted into the second gap (41) along the axial direction of the motor (10).

3. The wind wheel assembly according to claim 2, characterized in that: The second dust ring (112) is integrally formed with the stator (11); or, The dustproof structure further comprises a dustproof cover (30), wherein the dustproof cover (30) is sleeved on the outer periphery of the stator (11), and the second dustproof ring (112) is arranged on the dustproof cover (30).

4. The wind wheel assembly according to claim 3, characterized in that: An annular protrusion (31) is provided on the dust cover (30), the annular protrusion (31) is arranged on the outer peripheral side of the second dust ring (112) and is coaxially arranged with the second dust ring (112), and the annular protrusion (31) is located at the end of the first annular protrusion (221) close to the stator (11).

5. The wind wheel assembly according to claim 2, characterized in that: The rotor (12) is fixed to the crossflow impeller (20) by at least one of injection molding, fastener connection or clamp connection.

6. The wind wheel assembly according to claim 1, characterized in that: The minimum width δ of the first gap (40) satisfies the relationship: 0.4 mm ≤ δ ≤ 1.0 mm.

7. The wind wheel assembly according to claim 6, characterized in that: The wind wheel assembly also includes a spacer (50), wherein the spacer (50) is sleeved on the outer peripheral side of the rotating shaft (21), and two ends of the spacer (50) respectively abut against the crossflow wind wheel (20) and the bearing (70) so that the first gap (40) is provided between the stator (11) and the rotor (12).

8. The wind wheel assembly according to any one of claims 1 to 7, characterized in that: The wind wheel assembly further comprises a mounting base (60), and the stator (11) is mounted on a first side of the mounting base (60) via a shock-absorbing pad (80); A support bearing (71) is provided on a second side of the mounting base (60) opposite to the first side, and the crossflow impeller (20) is rotatably mounted between the support bearing (71) and the motor (10).

9. The wind wheel assembly according to claim 8, characterized in that: The support bearing (71) comprises a self-adjustable bearing.

10. An air conditioner, characterized in that: A wind wheel assembly comprising any one of claims 1 to 9.

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