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 and a cross-flow wind wheel; the motor comprises a stator and a rotor, the stator is provided with a center hole, and a bearing is arranged in the center hole; wherein the rotor is fixedly arranged at the end, close to the stator, of the cross-flow wind wheel, the rotor and the stator are oppositely arranged in the axial direction, a rotating shaft is arranged at the end, close to the stator, of the cross-flow wind wheel, and the rotating shaft sequentially penetrates through the rotor and the bearing. The wind wheel assembly and the air conditioner at least can solve the problems that in the prior art, a motor is large in vibration and noise.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, and in particular, to a wind wheel assembly for 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 wind wheel to rotate. Among them, one side of the cross-flow wind wheel is provided with a shaft extension and an oil-impregnated bearing, and a bowl-shaped magnetic ring and a rotating shaft are installed on the end face of the wind wheel on the other side. The bowl-shaped end face of the magnetic ring is combined with the end face of the wind wheel 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 wind wheel shaft extends into a bearing arranged in the center of the stator to keep the center of the cross-flow wind wheel coincident with the center of the motor. The motor drives the magnetic ring to drive the cross-flow wind wheel to rotate. The use of an external rotor permanent magnet synchronous motor for driving has a compact and simple structure, shortens the axial dimension of the whole machine, and reduces the installation space and cost; however, the bowl-shaped magnetic ring has a large volume and high cost, and the inner stator winding iron core is limited in size within the magnetic ring and the winding heat dissipation is not good, and there are also problems of motor vibration and high noise. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a wind wheel assembly and an air conditioner, which at least solve the problems of motor vibration and high noise in the prior art.

[0004] According to one aspect of the utility model, a wind wheel assembly is provided, which includes a motor and a cross-flow wind wheel. The motor includes a stator and a rotor. The stator is provided with a central hole, and a bearing is arranged in the central hole. The wind wheel assembly includes:

[0005] A cross-flow wind wheel, the rotor is fixedly arranged at one end of the cross-flow wind wheel close to the stator, the rotor and the stator are axially opposite to each other, a rotating shaft is arranged at one end of the cross-flow wind wheel close to the stator, and the rotating shaft sequentially passes through the rotor and the bearing.

[0006] Further, the rotor is injection-molded and fixed to the cross-flow wind wheel.

[0007] Further, the rotor is adhesively fixed to the cross-flow wind wheel.

[0008] Further, one of the rotor and the cross-flow wind wheel is provided with a positioning protrusion, and the other is provided with a positioning groove adapted to the positioning protrusion.

[0009] Further, there is a gap between the rotor and the stator, and the rotor and the stator are arranged in parallel on both sides of the gap.

[0010] Further, the rotating shaft is injection-molded and fixed to the cross-flow wind wheel.

[0011] Further, the wind wheel assembly further includes a spacer sleeve sleeved on the outer peripheral side of the rotating shaft, and two ends of the spacer sleeve respectively abut against the cross-flow wind wheel and the bearing so that there is the gap between the stator and the rotor.

[0012] Further, the wind wheel assembly further includes a mounting base, and the stator is mounted on the first side of the mounting base through a shock pad;

[0013] A support bearing is arranged on the second side of the mounting base opposite to the first side, and the cross-flow wind wheel is rotatably mounted between the support bearing and the motor.

[0014] Further, the support bearing includes a self-aligning bearing.

[0015] On the other hand, the present invention further provides an air conditioner, and the air conditioner includes the above-mentioned wind wheel assembly.

[0016] In the present invention, by fixedly arranging the rotor at one end of the cross-flow wind wheel close to the stator, and axially opposing the rotor and the stator, the structural strength of the rotor and the cross-flow wind wheel is improved, and the concentricity between the rotor and the cross-flow wind wheel is ensured. When the rotating shaft on the cross-flow wind wheel sequentially passes through the bearings on the rotor and the stator, the coaxiality between the cross-flow wind wheel and the stator is easier to ensure, and it is easier to realize the torque transmission between the stator and the rotor to drive the cross-flow wind wheel to rotate, reducing the vibration noise of the motor.

[0017] That is to say, by fixedly arranging the rotor on the cross-flow wind wheel, the axial dimension of the wind wheel assembly can be reduced, which is beneficial to realizing the miniaturized design of the air conditioner. In addition, the rotor and the cross-flow wind wheel are fixedly arranged and then assembled with the motor, which is beneficial to reducing the vibration noise of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute an improper limitation to the present invention. In the drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of the wind wheel assembly disclosed in the embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the overall structure of the wind wheel assembly disclosed in the embodiment of the present invention;

[0021] Figure 3 is a cross-sectional view of the wind wheel assembly disclosed in the embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of the structure of the stator on the wind wheel assembly disclosed in the embodiment of the present invention.

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 10. Motor; 11. Stator; 111. Central hole; 12. Rotor; 20. Cross-flow impeller; 21. Rotating shaft; 30. Gap; 40. Sleeve; 50. Bearing; 60. Mounting base; 70. Support bearing; 80. Shock pad. Detailed implementation manners

[0025] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] It should be noted that the terms used herein are only for describing the specific implementation manners 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 indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. 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 authorization specification. In all the examples shown and discussed herein, 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 similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0028] As mentioned in the background art, currently, in order to achieve the miniaturization development of air conditioners, an external rotor permanent magnet synchronous motor is used to drive the cross-flow impeller to rotate. However, in the actual use process, problems such as motor vibration and large noise are likely to occur when the motor drives the cross-flow impeller to rotate. For this reason, the present application proposes a wind wheel assembly, which can reduce motor vibration to a certain extent and thus reduce noise. The wind wheel assembly of the present application will be introduced in detail below with reference to the drawings.

[0029] See Figures 1 to 4As 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 and a cross-flow wind wheel 20.

[0030] Among them, the motor 10 includes a stator 11 and a rotor 12. The stator 11 is provided with a central hole 111, and a bearing 50 is arranged in the central hole 111; the rotor 12 is fixedly arranged at one end of the cross-flow wind wheel 20 close to the stator 11. The rotor 12 and the stator 11 are axially opposite to each other. A rotating shaft 21 is arranged at one end of the cross-flow wind wheel 20 close to the stator 11, and the rotating shaft 21 sequentially passes through the rotor 12 and the bearing 50.

[0031] In this embodiment, by fixedly arranging the rotor 12 at one end of the cross-flow wind wheel 20 close to the stator 11, and the rotor 12 and the stator 11 are axially opposite to each other, the structural strength of the rotor 12 and the cross-flow wind wheel 20 is improved, and the concentricity between the rotor 12 and the cross-flow wind wheel 20 is ensured. When the rotating shaft 21 on the cross-flow wind wheel 20 sequentially passes through the rotor 12 and the bearing 50 on the stator 11, the coaxiality between the cross-flow wind wheel 20 and the stator 11 is easier to ensure, and it is easier to realize the torque transmission between the stator 11 and the rotor 12, thereby driving the cross-flow wind wheel 20 to rotate and reducing the vibration noise of the motor 10.

[0032] That is to say, by fixedly arranging the rotor 12 on the cross-flow wind wheel 20, the axial dimension of the wind wheel assembly can be reduced, which is beneficial to realizing the miniaturization design of the air conditioner. In addition, the rotor 12 and the cross-flow wind wheel 20 are fixedly arranged and then assembled with the motor 10, which is beneficial to reducing the vibration noise of the motor 10.

[0033] Such as Figures 1 to 3 As shown, the rotor 12 is injection-molded and fixed on the cross-flow wind wheel 20. The rotor 12 and the cross-flow wind wheel 20 are fixed together by injection molding, which enhances the structural strength between the rotor 12 and the cross-flow wind wheel 20. When the motor 10 drives the cross-flow wind wheel 20 to rotate, the coaxiality between the cross-flow wind wheel 20 and the stator 11 is easier to ensure, and the axial air gap uniformity between the rotor 12 and the stator 11 is guaranteed, thereby reducing the vibration noise of the motor 10.

[0034] Further, the rotor 12 can also be fixed to the cross-flow impeller 20 by means of glue bonding. Exemplarily, the rotor 12 can be directly bonded to one end of the cross-flow impeller 20 close to the stator 11 by glue, or can be fixed by a combination of insertion and glue between the rotor 12 and the cross-flow impeller 20. In other embodiments of the present application, a positioning protrusion (not shown in the figure) is provided on one of the rotor 12 and the cross-flow impeller 20, and a positioning groove (not shown in the figure) adapted to the positioning protrusion is provided on the other. That is to say, when the positioning protrusion is provided on the cross-flow impeller 20, the positioning groove is provided on the rotor 12; when the positioning protrusion is provided on the rotor 12, the positioning groove is provided on the cross-flow impeller 20. With such a setting, during actual assembly, through the mutual cooperation of the positioning protrusion and the positioning groove, the rotor 12 can be pre-positioned on the cross-flow impeller 20, and then the rotor 12 and the cross-flow impeller 20 can be bonded and fixed together. The structure is simple and the bonding is convenient.

[0035] In the present application, it is preferably to adopt the fixing method of injection molding the rotor 12 and the cross-flow impeller 20. When using glue bonding for a long time, the bonding may fail, which may affect the normal use of the impeller assembly. By using the injection molding method, the rotor 12 and the cross-flow impeller 20 are integrally formed by injection molding, and the structure is more stable and reliable, which is convenient for improving the service life of the impeller assembly in this embodiment.

[0036] As Figure 3 shown, there is a gap 30 between the rotor 12 and the stator 11, and the rotor 12 and the stator 11 are arranged in parallel on both sides of the gap 30. This gap 30 is a standard for measuring the performance and quality of the motor 10, and this gap 30 ensures the smoothness and smoothness of the rotation of the motor 10. During actual design, the size of this gap 30 should be within a suitable range. The gap 30 should neither be too large nor too small to ensure that the rotor 12 of the motor 10 can move freely in the bearing 50, and at the same time, no serious vibration and noise will be generated; in addition, when the accuracy of the gap 30 is kept within a reasonable range, it can ensure that the force and power output by the motor 10 can meet the expected standard requirements.

[0037] Further, in the present application, the minimum width δ of the gap 30 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 the rotation of the motor 10, there must be a gap 30 between the stator 11 and the rotor 12. The size of this gap 30 affects the performance of the motor 10. Specifically, the gap 30 affects the power of the motor 10. When the gap 30 is uneven, vibrations and noises 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 damage to the bearing 50. If the gap 30 is less than 0.4 mm, when the motor 10 is working, the eccentricity of the rotor 12 relative to the stator 11 easily causes the shaft stiffness to be affected by the unbalanced magnetic pull 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 gap 30 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 gap 30 is greater than 1.0 mm, the magnetic field coupling between the stator 11 and the rotor 12 will weaken, easily leading to a decrease in the efficiency and output power of the motor 10.

[0038] Further, the rotating shaft 21 is injection-molded and fixed to the cross-flow impeller 20. The rotating shaft 21 and the cross-flow impeller 20 are also integrally formed by injection molding. With such a setting, when the motor 10 drives the cross-flow impeller 20 to rotate, the rotating shaft 21 is driven to rotate, ensuring the normal operation performance of the impeller assembly.

[0039] As Figures 1 to 3 shown, the impeller assembly further includes a spacer sleeve 40. The spacer sleeve 40 is sleeved on the outer peripheral side of the rotating shaft 21, and both ends of the spacer sleeve 40 respectively abut against the cross-flow impeller 20 and the bearing 50 so that there is a gap 30 between the stator 11 and the rotor 12. The gap 30 has an important influence on the performance and operating state of the motor 10. Therefore, during the actual assembly process, the gap 30 between the stator 11 and the rotor 12 needs to be accurately controlled. In this embodiment, the accurate control of the gap 30 is achieved by using the spacer sleeve 40 to ensure that the gap 30 is within a suitable range, which is beneficial to improving the operating stability of the motor 10.

[0040] Further, as Figure 3 shown, the impeller 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 generated during the operation of the motor 10 from being transmitted to the mounting base 60 of the impeller assembly.

[0041] Furthermore, a support bearing 70 is provided on the second side of the mounting base 60 opposite to the first side, and the cross-flow impeller 20 is rotatably mounted between the support bearing 70 and the motor 10. With this arrangement, when assembling the cross-flow impeller 20 and the motor 10, only the stator 11 needs to be installed on the mounting base 60 and fixed by the shock-absorbing pad 80, and the cross-flow impeller 20 with the rotor 12 is inserted into the bearing 50. The installation is simple, and the axial volume of the whole air conditioner is greatly reduced.

[0042] Furthermore, as Figure 3 shown, the support bearing 70 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 50 at the motor 10 end, the uniformity of the gap 30 between the end face of the rotor 12 and the end face of 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 70 is self-aligning, the center of the cross-flow impeller 20 is adjusted according to the center of the bearing 50 on the motor 10 side, ensuring smooth rotation of the cross-flow impeller 20 and ensuring a certain coaxiality between the motor 10 and the cross-flow impeller 20 as well as the uniformity of the gap 30.

[0043] It can be known from the above embodiments that the impeller assembly of the present utility model can at least achieve the following technical effects:

[0044] (1) In the present utility model, by arranging the rotor on the cross-flow impeller, the structure is simple and compact when assembled with the motor.

[0045] (2) In the present utility model, by fixing the rotor to the cross-flow impeller by injection molding, the fixing effect is improved, and a certain coaxiality between the cross-flow impeller and the rotor is ensured, which is beneficial to the stable operation of the impeller assembly.

[0046] (3) In the present utility model, by providing a self-aligning bearing on one side of the cross-flow impeller and a non-self-aligning bearing on the motor, through appropriate adjustment between the two bearings, the uniformity of the gap between the stator and the rotor is ensured, thereby reducing the vibration noise of the motor.

[0047] On the other hand, in combination with Figures 1 to 4As shown in the figure, 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, the rotating shaft 21 and the cross-flow impeller 20 are integrally combined by injection molding, with a simple and compact structure, greatly shortening the overall axial dimension of the air conditioner and realizing the miniaturized design of the air conditioner. In addition, in the impeller assembly of the air conditioner, a self-aligning bearing is provided at one end of the cross-flow impeller 20, and the stator 11 is installed on the mounting base 60 by using a shock pad 80 to ensure a certain coaxiality between the cross-flow impeller 20 and the stator 11. When the bearing 50 and the support bearing 70 are appropriately adjusted, it is beneficial to maintain the uniformity of the gap 30 to ensure that the rotor 12 of the motor 10 can move freely within the bearing 50 without generating serious vibration and noise.

[0048] Through the above settings, when the air conditioner operates, the noise is small, thereby improving the use comfort of the user.

[0049] For the sake of convenience in description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0050] In addition, it should be noted that the use of words such as "first", "second" etc. to limit the components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings, so they cannot be understood as limiting the protection scope of the present utility model.

[0051] 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, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wind wheel assembly, comprising a motor (10) and a crossflow wind wheel (20); the motor (10) comprises a stator (11) and a rotor (12); the stator (11) is provided with a center hole (111), and a bearing (50) is provided in the center hole (111); the characteristics are: include: A crossflow fan wheel (20), wherein the rotor (12) is fixedly arranged at one end of the crossflow fan wheel (20) close to the stator (11), the rotor (12) and the stator (11) are axially arranged opposite to each other, and a rotating shaft (21) is arranged at one end of the crossflow fan wheel (20) close to the stator (11), and the rotating shaft (21) is sequentially passed through the rotor (12) and the bearing (50).

2. The wind wheel assembly according to claim 1, characterized in that: The rotor (12) is fixed to the crossflow impeller (20) by injection molding.

3. The wind wheel assembly according to claim 1, characterized in that: The rotor (12) is adhesively fixed to the crossflow impeller (20).

4. The wind wheel assembly according to claim 3, characterized in that: A positioning protrusion is provided on one of the rotor (12) and the crossflow impeller (20), and a positioning groove matched with the positioning protrusion is provided on the other of the rotor (12).

5. The wind wheel assembly according to claim 1, characterized in that: A gap (30) is provided between the rotor (12) and the stator (11), and the rotor (12) and the stator (11) are arranged in parallel on both sides of the gap (30).

6. The wind wheel assembly according to claim 2, characterized in that: The rotating shaft (21) is fixed to the crossflow impeller (20) by injection molding.

7. The wind wheel assembly according to claim 5, characterized in that: The wind wheel assembly also includes a spacer (40), the spacer (40) being sleeved on the outer circumference of the rotating shaft (21), and the two ends of the spacer (40) respectively abutting against the crossflow wind wheel (20) and the bearing (50) so that the gap (30) 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 (70) 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 (70) and the motor (10).

9. The wind wheel assembly according to claim 8, characterized in that: The support bearing (70) 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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