Motor assembly, air conditioner indoor unit and air conditioner

Abstract

The application provides an electric machine assembly, an air conditioner indoor unit and an air conditioner. The electric machine assembly comprises an outer rotor motor and a mounting shell. The outer rotor motor comprises a power part and a power output shaft. The power part comprises an outer rotor and a stator arranged in the outer rotor. The power output shaft is connected with the outer rotor. The mounting shell is fixedly connected with the stator. The power part is arranged in the mounting shell. At least one end of the power output shaft penetrates through the mounting shell. The mounting shell is provided with a first supporting flange at opposite ends along the axial direction of the outer rotor motor. The electric machine assembly is supported at a to-be-mounted position through the first supporting flanges. The electric machine assembly of the application is axially supported at two points, which is the same as an inner rotor motor. Without changing the structures of other components, the inner rotor motor of the prior art can be directly replaced by the electric machine assembly of the application. Thus, the interchangeability is good, and the application range of the electric machine assembly is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and more particularly to a motor assembly, an indoor air conditioning unit, and an air conditioner. Background Technology

[0002] In related technologies, one common type of electric motor has the stator on the outside and the rotor on the inside; this type of motor is called an "internal rotor motor." Another type of motor has the stator armature inside and the rotor with permanent magnets on the outside; this structure is called an "external rotor motor," or "internal stator motor." External rotor motors have higher rotor inertia and a higher output torque / output power ratio, and therefore are used in applications requiring higher torque output.

[0003] Because the rotor of an external rotor motor is on the outside, its installation is a rather tricky issue. In addition, since the installation methods of internal rotor motors and external rotor motors are significantly different, currently, users cannot replace an internal rotor motor with an external rotor motor on the same equipment without changing the equipment's installation structure. Summary of the Invention

[0004] In view of this, embodiments of this application aim to provide a motor assembly, an indoor air conditioning unit, and an air conditioner that can share a common mounting structure with an internal stator motor.

[0005] To achieve the above objectives, embodiments of this application provide a motor assembly, including:

[0006] An external rotor motor, the external rotor motor including a power unit and a power output shaft, the power unit including an external rotor and a stator disposed inside the external rotor, the power output shaft being connected to the external rotor;

[0007] The mounting housing is fixedly connected to the stator, the power unit is disposed inside the mounting housing, at least one end of the power output shaft extends out of the mounting housing, and the mounting housing is provided with first support flanges at opposite ends along the axial direction of the power output shaft. The motor assembly is supported at the installation position by each of the first support flanges.

[0008] In some embodiments, the first axial end of the power unit is fixedly connected to the mounting housing via the stator, and the second axial end of the power unit is rotatably supported on the mounting housing via the outer rotor.

[0009] In some embodiments, the outer rotor is provided with a second support flange on the axial side away from the stator, wherein the interior of the first support flange is hollow, and the second support flange extends into the first support flange.

[0010] In some embodiments, the motor assembly includes a first bearing sleeved on the second support flange, and the first bearing is disposed between the first support flange and the second support flange.

[0011] In some embodiments, the stator has a third support flange formed on the side for connection with the mounting housing, the power output shaft passes through the third support flange, and the third support flange extends into the corresponding first support flange.

[0012] In some embodiments, the mounting housing includes a first housing and a second housing that are axially joined along the outer rotor motor, the power unit being located within the space enclosed by the first housing and the second housing, wherein one of the first support flanges is disposed on the first housing and the other of the first support flanges is disposed on the second housing.

[0013] In some embodiments, one of the first shell and the second shell is provided with a buckle, and the other is provided with a slot, the buckle and the slot engaging in a snap-fit ​​connection.

[0014] In some embodiments, the slot is disposed on the first housing, the slot including a communicating inlet sub-slot and a locking sub-slot, the inlet sub-slot extending axially along the first housing, the locking sub-slot extending circumferentially from the end of the inlet sub-slot along the first housing, the latch protruding from the circumferential surface of the second housing, the latch being capable of entering the locking sub-slot from the inlet sub-slot; the first housing and the second housing are fixedly connected by at least one screw.

[0015] In some embodiments, the first shell is provided with a connecting piece extending radially outward, the connecting piece being provided with a through hole, and the outer surface of the second shell is provided with a protrusion, the screw passing through the through hole and being screwed into the protrusion.

[0016] In some embodiments, the first shell is provided with a first notch that penetrates the edge of the first shell for docking with the second shell, and the second shell is provided with a second notch that penetrates the edge of the second shell for docking with the first shell. The first notch and the second notch together form a wire passage groove through which the wire of the external rotor motor passes.

[0017] In some embodiments, the motor assembly includes a vibration damping sleeve fitted onto the first support flange.

[0018] This application embodiment also provides an air conditioner indoor unit, including a chassis, a cross-flow fan, a heat exchanger, and a motor assembly of any one of the above; the chassis is equipped with a volute extending along the length direction of the chassis and a motor mounting slot located at one end of the volute; the cross-flow fan is rotatably disposed within the volute; the heat exchanger is connected to the chassis and extends along the length direction of the chassis, and the airflow after heat exchange by the heat exchanger enters the volute under the action of the cross-flow fan; the motor assembly is disposed in the motor mounting slot and supported on the side plate corresponding to the motor mounting slot by two first support flanges, and the power output shaft is rotatably connected to the cross-flow fan to drive the cross-flow fan to rotate.

[0019] In some embodiments, the chassis has a water channel for collecting condensate from the heat exchanger and two water tanks communicating with the water channel. The water channel surrounds the volute, and the condensate in the water channel can collect into the corresponding water tank.

[0020] In some embodiments, the side plate of the motor mounting slot near the volute is spaced apart from the side wall of the volute to form part of the water guiding channel.

[0021] This application also provides an air conditioner, including an outdoor unit and any of the above-mentioned indoor units, wherein the outdoor unit and the indoor unit are connected by a refrigerant pipe.

[0022] In this embodiment of the motor assembly, when installation is required, the two first support flanges are supported at the installation position to achieve axial double-point support of the motor assembly, avoiding the single-point cantilever support form of the motor assembly. In other words, the installation method of the motor assembly in this embodiment is the same as that of the internal rotor motor, both being axial double-point support. Therefore, without changing the structure of other components, the existing internal rotor motor can be directly replaced with the motor assembly of this embodiment, thus achieving interchangeability with the internal rotor motor, providing good interchangeability and expanding the applicability of the motor assembly. Since the cost of the external rotor motor is relatively low, and the motor assembly of this embodiment can be interchanged with the internal rotor motor, when assembling the motor assembly onto other equipment, equipment upgrades can be achieved while reducing manufacturing costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a motor assembly according to an embodiment of this application, wherein the vibration damping sleeve is omitted;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0025] Figure 3 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0026] Figure 4 for Figure 3 A schematic diagram of the structure shown from another perspective;

[0027] Figure 5 This is an exploded view of a motor assembly according to an embodiment of this application;

[0028] Figure 6 for Figure 5 A schematic diagram of the structure shown from another perspective;

[0029] Figure 7 For along Figure 4 A cross-sectional view along the AA direction, omitting the internal structure of the external rotor motor;

[0030] Figure 8 This is a partial structural diagram of an air conditioner indoor unit according to an embodiment of this application, wherein the dashed lines and arrows indicate the flow path of condensate water;

[0031] Figure 9 for Figure 8 A magnified view of a portion of point B, where the dashed lines and arrows indicate the flow path of the condensate.

[0032] Figure 10 for Figure 8 A schematic diagram of the structure from another perspective.

[0033] Explanation of reference numerals in the attached figures

[0034] Motor assembly 1; external rotor motor 11; power unit 111; external rotor 1111; second support flange 11111; stator 1112; third support flange 11121; connecting protrusion 11122; power output shaft 112; line body 113; mounting housing 12; first housing 121; end plate 1211; skirt plate 1212; connecting piece 12121; slot 121a; inlet sub-slot 121a′; locking sub-slot 121a″; first notch 121b; recessed area 121c; through hole 121d; second housing 122; Shrink cylinder section 1221; Buckle 1222; Protrusion 1223; Second notch 122a; Stepped surface 122b; First support flange 123; First bearing 13; Second bearing 14; Vibration damping sleeve 15; Cylindrical section 151; Annular protrusion 152; Positioning boss 153; Chassis 2; Volute 21; Motor mounting slot 2a; First water guide channel 201a; Second water guide channel 201b; Third water guide channel 201c; Fourth water guide channel 201d; Water tank 202; Drainage hole 202a Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0036] In the description of the embodiments in this application, "axial direction," "first side," "second side," orientation, or positional relationship are based on the appendix. Figure 7 The indicated orientation or positional relationship. In the embodiments of this application, "front," "rear," "left," and "right" are based on... Figure 8 The orientation or positional relationship shown is for illustrative purposes only and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0037] This application provides a motor assembly 1, please refer to... Figure 5 and Figure 6 The motor assembly 1 includes an external rotor motor 11 and a mounting housing 12.

[0038] Please see Figure 5 The external rotor motor 11 includes a power unit 111 and a power output shaft 112. (See also...) Figure 6 The power unit 111 includes an outer rotor 1111 and a stator 1112 disposed within the outer rotor 1111. The power output shaft 112 is connected to the outer rotor 1111, and the outer rotor 1111 drives the power output shaft 112 to rotate synchronously. It should be noted that the outer rotor motor 11 outputs torque through the power output shaft 112; that is, the outer rotor motor 11 drives the rotation of other structures through the power output shaft 112.

[0039] The specific internal structure of the external rotor motor 11 in this embodiment is not limited, and the external rotor motor 11 can realize complete motor functions.

[0040] The mounting housing 12 is fixedly connected to the stator 1112, and the power unit 111 is disposed inside the mounting housing 12. In other words, the mounting housing 12 surrounds the outer rotor 1111 and the stator 1112, facilitating the installation of the motor assembly 1 and protecting the outer rotor 1111 from damage by other parts, thus ensuring the reliable rotation of the outer rotor 1111. (See also...) Figure 1 , Figure 2 , Figure 3 as well as Figure 7At least one end of the power output shaft 112 extends out of the mounting housing 12. The mounting housing 12 is provided with first support flanges 123 at both opposite ends along the axial direction of the outer rotor motor 11. The motor assembly 1 is supported in the installation position by each of the first support flanges 123, that is, all the first support flanges 123 jointly bear the weight of the motor assembly 1.

[0041] It should be noted that the installation location refers to the target location where the motor assembly 1 needs to be installed.

[0042] It is understandable that the inner rotor motor is supported by axial double-point support, that is, the inner rotor motor is supported on opposite sides of the axis at the installation position. Since the outer rotor motor 11 has advantages such as small size, large output torque and high output power, even if the mounting shell 12 is provided on the outside of the outer rotor motor 11, the overall size of the motor assembly 1 can be comparable to or smaller than the overall size of the inner rotor motor.

[0043] In this embodiment, when the motor assembly 1 needs to be installed, the two first support flanges 123 are supported in the position to be installed, and the first support flanges 123 are positioned by pressure plates and other parts, thus achieving axial double-point support for the motor assembly 1 and avoiding a single-point cantilever support. In other words, the motor assembly 1 in this embodiment has the same installation method as the internal rotor motor, both being axial double-point support. Therefore, without changing the structure of other components, the existing internal rotor motor can be directly replaced with the motor assembly 1 of this embodiment, thus achieving interchangeable installation with the internal rotor motor, providing good interchangeability and expanding the applicability of the motor assembly 1.

[0044] Since the cost of the external rotor motor 11 is relatively low, and the motor assembly 1 of this application embodiment can be interchanged with the internal rotor motor, when the motor assembly 1 is assembled onto other equipment, the equipment can be updated and iterated while reducing the manufacturing cost of the equipment.

[0045] The power unit 111 can adopt an existing structural form, that is, a mature external rotor motor can be purchased from the market.

[0046] The power output shaft 112 can extend from one axial end of the power unit 111, or it can extend from both opposite axial ends of the power unit 111. In this embodiment, the example of the power output shaft 112 extending from one axial end of the power unit 111 will be described.

[0047] In some embodiments, the power output shaft 112 is arranged generally in a horizontal direction. That is, in normal use, the power output shaft 112 of the motor assembly 1 of this application embodiment is arranged in a generally horizontal direction. It is understood that the power output shaft 112 may also be arranged at a certain angle to the horizontal direction, for example, within ±10° relative to the horizontal direction.

[0048] The specific structural form of the first support flange 123 is not limited, as long as it is convenient to support it in the installation position. For example, in one embodiment, the first support flange 123 is cylindrical.

[0049] The position of the first support flange 123 relative to the axis of the power output shaft 112 is not limited. The centerline of each first support flange 123 can coincide with or be parallel to the axis of the power output shaft 112. Specifically, in the embodiment of this application, the centerline of the first support flange 123 coincides with the axis of the power output shaft 112. This can avoid the power output shaft 112 generating an eccentric torque on the first support flange 123 during rotation, and improve the stress conditions at the connection between the first support flange 123 and the installation position.

[0050] The mounting housing 12 should be enclosed as much as possible while meeting the heat dissipation requirements of the external rotor motor 11, so as to achieve waterproof and dustproof effects and prevent impurities from entering the mounting housing 12 and interfering with the rotation of the external rotor 1111.

[0051] To facilitate heat dissipation of the external rotor motor 11, heat dissipation holes can be provided at the lower end of the mounting housing 12. The upper part of the mounting housing 12 serves as a waterproof and dustproof surface, preventing external water droplets, dust, etc., from falling into the mounting housing 12. The number and shape of the heat dissipation holes are not limited, as long as they facilitate heat dissipation of the external rotor motor 11 and ensure that the structural strength of the mounting housing 12 meets the requirements.

[0052] In one embodiment, the first axial end of the power unit 111 is fixedly connected to the mounting housing 12 via the stator 1112, and the second axial end of the power unit 111 is rotatably supported on the mounting housing 12 via the outer rotor 1111. For details, please refer to... Figure 5 and Figure 6 The outer rotor 1111 has a second support flange 11111 on the axial side opposite to the stator 1112. Please refer to the relevant documentation. Figure 7 The second axial end of the power unit 111 is rotatably supported within the mounting housing 12 via the second support flange 11111. In this embodiment, the mounting housing 12 provides dual-point support to the opposite sides of the power unit 111 along the axial direction, improving the stress conditions of the power unit 111 and preventing the power unit 111 from being cantilevered, thereby improving the rotational stability of the outer rotor 1111.

[0053] In one embodiment, please refer to Figure 7One of the first support flanges 123 is hollow, and the second support flange 11111 is rotatably supported within the corresponding first support flange 123. That is, the second support flange 11111 extends into the first support flange 123, and the first support flange 123 supports the second support flange 11111. In this way, the internal space of the first support flange 123 can be fully utilized to accommodate it, reducing the volume of the mounting housing 12 and making the motor assembly 1 more compact.

[0054] To reduce the frictional resistance of the second support flange 11111 during rotation, in one embodiment, please refer to... Figure 6 and Figure 7 The motor assembly 1 includes a first bearing 13, which is sleeved on the second support flange 11111 and disposed between the first support flange 123 and the second support flange 11111. The first bearing 13 can not only reliably support the second support flange 11111, but also effectively reduce the frictional resistance of the second support flange 11111.

[0055] The specific type of the first bearing 13 is not limited, as long as it can enable relative rotation between the second support flange 11111 and the first support flange 123. It is understood that the size of the first bearing 13 should be as small as possible so that it can be installed in the narrow space within the first support flange 123.

[0056] In one embodiment, the outer rotor 1111 has a receiving space that is open along the first axial side of the power unit 111, and the stator 1112 is disposed in the receiving space. That is, the first axial side of the stator 1112 is exposed to the outside, which facilitates the fixed connection between the stator 1112 and the mounting housing 12. The stator 1112 is surrounded by the outer rotor 1111 in both the circumferential and axial second sides.

[0057] The axial first side end face of the stator 1112 can be completely located within the outer rotor 1111, that is, the axial first side end face of the stator 1112 does not extend beyond the end face of the outer rotor 1111. Of course, the axial first side end face of the stator 1112 can also protrude beyond the end face of the outer rotor 1111, which facilitates the fixed connection with the mounting housing 12.

[0058] The method of fixing the stator 1112 and the mounting shell 12 is not limited, including but not limited to: welding, screw connection, riveting, etc.

[0059] For example, in one embodiment, a plurality of connecting protrusions 11122 are formed on the first axial side of the stator 1112. The connecting protrusions 11122 are provided with screw holes. The screw passes through the end face of the mounting shell 12 along the axial direction of the power unit 111 and is screwed into the screw hole, so that the stator 1112 and the mounting shell 12 can be fixedly connected.

[0060] In one embodiment, please refer to Figure 6 The stator 1112 has a third support flange 11121 on the side for connection with the mounting housing 12. Please refer to the relevant documentation. Figure 7 The power output shaft 112 passes through the third support flange 11121. Figure 6 The first support flange 123 on the left side is hollow inside, and the third support flange 11121 extends into the corresponding first support flange 123. The first support flange 123 supports the third support flange 11121 and can reduce the shear force on the screws at the connection between the stator 1112 and the mounting housing 12, thereby improving the connection reliability between the stator 1112 and the mounting housing 12.

[0061] Since there is no relative movement between the third support flange 11121 and the first support flange 123, and the first support flange 123 only needs to support the third support flange 11121, in one embodiment, the first support flange 123 and the third support flange 11121 can be used with an interference fit to prevent the first support flange 123 from moving within the third support flange 11121.

[0062] In one embodiment, please refer to Figure 7 The third support flange 11121 is hollow inside. The motor assembly 1 includes a second bearing 14 housed within the third support flange 11121, and the second bearing 14 is sleeved on the power output shaft 112. The second bearing 14 provides good rotational support for the power output shaft 112, improving the stress conditions of the power output shaft 112. On the other hand, it also makes full use of the space within the third support flange 11121, making the motor assembly 1 compact in structure.

[0063] It should be noted that the aforementioned multiple connecting protrusions 11122 are arranged around the third support flange 11121, which makes the force at the connection between the mounting shell 12 and the multiple connecting protrusions 11122 relatively uniform.

[0064] In one embodiment, the first shell 121 has a recessed region 121c, and the mounting shell 12 is located at the recessed region 121c at the position where it connects with the connecting protrusion 11122. The recessed region 121c can reduce the axial distance between the mounting shell 12 and the connecting protrusion 11122, thereby improving the connection reliability between the mounting shell 12 and the connecting protrusion 11122.

[0065] The specific structural form of the mounting housing 12 is not limited, as long as it can provide good support for the external rotor motor 11.

[0066] For example, in one embodiment, please refer to Figure 5 and Figure 6The mounting housing 12 includes a first housing 121 and a second housing 122 axially joined together along the outer rotor motor 11. The power unit 111 is located within the space enclosed by the first housing 121 and the second housing 122. One first support flange 123 is disposed on the first housing 121, and the other first support flange 123 is disposed on the second housing 122. During assembly, the first housing 121 and the second housing 122 are simply joined axially from opposite ends of the power unit 111, making assembly convenient.

[0067] To enhance the structural strength of the first shell 121, the first shell 121 and the corresponding first support flange 123 can be integrally formed, which is convenient for manufacturing, reduces the number of parts, and facilitates assembly.

[0068] The material of the first housing 121 is not limited, as long as it meets the structural strength requirements. For example, in one embodiment, the first housing 121 and the first supporting flange 123 are integral sheet metal parts. This ensures the structural strength of the connection between the first housing 121 and the stator 1112, and also facilitates heat dissipation from the external rotor motor 11. Specifically, the first housing 121 is made of sheet metal. The heat generated by the external rotor motor 11 is transferred to the first housing 121, and the first housing 121 can radiate heat outwards using its own thermal conductivity, thus achieving heat dissipation. It should be noted that the first flange...

[0069] Similarly, the second shell 122 and the corresponding first support flange 123 can also be a one-piece molded structure, which is convenient to manufacture, reduces the number of parts, and facilitates assembly.

[0070] The material of the second shell 122 is not limited. Exemplarily, in one embodiment, the second shell 122 is a plastic part. On the one hand, the plastic material of the second shell 122 can reduce the overall weight of the motor assembly 1, which is conducive to the lightweight design of the motor assembly 1. On the other hand, it is convenient to manufacture and reduce production costs.

[0071] In one embodiment, please refer to Figures 1 to 3 One of the first shell 121 and the second shell 122 is provided with a buckle 1222, and the other is provided with a slot 121a. The buckle 1222 and the slot 121a are engaged. The engagement of the buckle 1222 and the slot 121a enables the rapid assembly of the first shell 121 and the second shell 122, improving assembly efficiency.

[0072] The specific structure of the buckle 1222 and the slot 121a is not limited, as long as they can achieve quick connection.

[0073] In one embodiment, for example, the latch 1222 is an elastic hook. During assembly, as the elastic hook engages with the slot 121a, it is forced to undergo elastic deformation. After the elastic hook engages with the slot 121a, it recovers its elastic deformation at least partially under its own elastic force, thus reliably locking itself in the slot 121a. In this embodiment, the cooperation between the elastic hook and the slot 121a enables axial and circumferential positioning of the mounting housing 12, eliminating the need for other fastening measures.

[0074] In another embodiment, where the first shell 121 is a sheet metal part and the second shell 122 is a plastic part, a slot 121a is provided on the first shell 121. Specifically, the slot 121a includes a communicating inlet sub-slot 121a′ and a locking sub-slot 121a″. The inlet sub-slot 121a′ extends axially along the first shell 121, and the locking sub-slot 121a″ extends circumferentially from the end of the inlet sub-slot 121a′. The latch 1222 is a protrusion protruding from the circumferential surface of the second shell 122, and the latch 1222 can enter the locking sub-slot 121a″ from the inlet sub-slot 121a′. The first shell 121 and the second shell 122 are fixedly connected by at least one screw.

[0075] During assembly, the first housing 121 and the second housing 122 are brought together, and the latch 1222 is aligned with the inlet sub-slot 121a'. The latch 1222 is pushed into the inlet sub-slot 121a', and then the first housing 121 or the second housing 122 is rotated to screw the latch 1222 into the locking sub-slot 121a''. The engagement of the latch 1222 and the locking sub-slot 121a'' enables axial positioning of the first housing 121 and the second housing 122, preventing them from axially separating. Afterwards, the first housing 121 and the second housing 122 are fastened together with screws. The screws prevent circumferential relative movement between the first housing 121 and the second housing 122. Since the first housing 121 and the second housing 122 do not move relative to each other during the operation of the external rotor motor 11, the forces exerted on the screws and the latch 1222 are relatively small. With the engagement of the latch 1222 and the latch 121a'', only one screw is required. Therefore, in this embodiment, the cooperation between the buckle 1222 and the slot 121a can greatly improve assembly efficiency, while the screw connection can ensure assembly reliability.

[0076] Furthermore, since the first shell 121 is a sheet metal part, even with the slot 121a provided on the first shell 121, the structural strength of the sheet metal part can still meet the requirements. The buckle 1222 can be integrally formed on the second shell 122 to meet the structural strength requirements and also facilitate processing.

[0077] The number of latches 1222 can be multiple, and the multiple latches 1222 are evenly arranged along the circumference of the second shell 122, and the latch slots 121a cooperate with the latches 1222 one by one. For example, in the embodiment of this application, the number of latches 1222 is three, and the three latches 1222 are evenly arranged along the circumference of the second shell 122.

[0078] To facilitate the screw connection between the first housing 121 and the second housing 122, in one embodiment, please refer to... Figure 2 and Figure 6 The first shell 121 is provided with a connecting piece 12121 extending radially outward, and the connecting piece 12121 is provided with a through hole 121d. The outer surface of the second shell 122 is provided with a protrusion 1223, and the screw passes through the through hole 121d and is screwed into the protrusion 1223.

[0079] Understandably, self-tapping screws can be used to tap the protrusion 1223 directly on-site during assembly. Alternatively, a threaded hole for the screw to mate with it can be pre-machined inside the protrusion 1223.

[0080] In the embodiment where the first shell 121 is a sheet metal part and the second shell 122 is a plastic part, since the sheet metal part has good structural strength, the structural strength of the connecting piece 12121 can meet the strength requirements of the screw connection. The protrusion 1223 has a relatively long length, which can meet the strength requirements of the screw connection. In addition, it can also serve as a reinforcing rib.

[0081] In one embodiment, please refer to Figure 5 and Figure 6 The first shell 121 has a first notch 121b that penetrates the edge of the first shell 121 for mating with the second shell 122. The second shell 122 has a second notch 122a that penetrates the edge of the second shell 122 for mating with the first shell 121. The first notch 121b and the second notch 122a together form a wire passage groove through which the wire 113 of the external rotor motor 11 passes. Specifically, during assembly, the first shell 121 and the second shell 122 are mated, and the wire 113 of the external rotor motor 11 is clamped in the wire passage groove. There is no need to pass the wire 113 through, saving assembly time and improving assembly efficiency.

[0082] In one embodiment, please refer to Figure 6The second shell 122, near the end of the first shell 121, contracts inward to form a contraction cylinder 1221. An annular stepped surface 122b is formed at the junction of the contraction cylinder 1221 and the non-contraction cylinder. The contraction cylinder 1221 extends into the first shell 121, and the end face of the first shell 121 abuts against the stepped surface 122b. In other words, a portion of the first shell 121 and the second shell 122 form a nested assembly. This increases the contact area between the first shell 121 and the second shell 122, and the contraction cylinder 1221 also provides radial and axial positioning for the first shell 121, improving the reliability of their connection. On the other hand, it also makes it easier for the circumferential surfaces of the first shell 121 and the second shell 122 to be flush, resulting in a neat and aesthetically pleasing appearance of the motor assembly 1.

[0083] In one embodiment, please refer to Figure 5 The first shell 121 includes an end plate 1211 and a skirt 1212 extending from the periphery of the end plate 1211 toward the second shell 122. The end plate 1211 has a generally circular outline, and the skirt 1212 is generally cylindrical and surrounds the edge of the end plate 1211. The aforementioned slot 121a, connecting piece 12121, and first notch 121b are all provided on the skirt 1212. It should be noted that, while meeting the requirements for the slot 121a, connecting piece 12121, and first notch 121b, the axial length of the skirt 1212 can be minimized to reduce the manufacturing difficulty of the sheet metal part.

[0084] In one embodiment, please refer to Figure 5 and Figure 6 The motor assembly 1 includes multiple vibration damping sleeves 15, which are fitted onto the first support flange 123. When the motor assembly 1 is installed in the desired position, the vibration damping sleeves 15 act as a space between the first support flange 123 and the desired position, providing vibration damping support for the motor assembly 1. In other words, the first support flange 123 does not directly contact the desired position. When the external rotor motor 11 operates, it transmits electromagnetic excitation force to the first support flange 123. Due to the vibration isolation effect of the vibration damping sleeves 15, the first support flange 123 does not transmit the electromagnetic excitation force to the desired position. The electromagnetic excitation force is largely absorbed by the vibration damping sleeves 15, significantly reducing the electromagnetic excitation force transmitted to the desired position. This effectively suppresses forced vibration of the surrounding structure and inhibits outward radiated noise.

[0085] The material of the damping sleeve 15 is not limited, as long as it can achieve a good damping and vibration reduction effect. For example, it includes, but is not limited to, rubber, silicone, resin, and fiber.

[0086] In one embodiment, please refer to Figure 5 and Figure 6The damping sleeve 15 near the power output shaft 112 includes a cylindrical portion 151 and an annular flange 152 protruding from the circumferential surface of the cylindrical portion 151. The first shell 121 has a recessed region 121c. Specifically, a portion of the end plate 1211 is recessed inward to form the recessed region 121c. The recessed region 121c surrounds the first support flange 123.

[0087] The annular protrusion 152 is located within the recessed area 121c, and its end face along the first axial direction protrudes beyond the end face along the first axial direction of the first housing 121. The outline shape of the annular protrusion 152 is adapted to the edge of the recessed area 121c, for example, it is approximately circular, and the circumferential surface of the annular protrusion 152 contacts the wall surface at the corresponding edge of the recessed area 121c. The cooperation between the annular protrusion 152 and the recessed area 121c can, on the one hand, reduce the degree of protrusion of the corresponding damping sleeve 15 from the first housing 121, and on the other hand, during the operation of the external rotor motor 11, vibration is inevitable. When the damping sleeve 15 is pressed against the installation position by means of a pressure plate, the axial side of the pressure plate can contact the annular protrusion 152, avoiding contact between the pressure plate and the first housing 121, thereby avoiding frictional noise between the pressure plate and the first housing 121.

[0088] In one embodiment, please refer to... Figure 5 and Figure 6 The vibration damping sleeve 15 on the side away from the power output shaft 112 is provided with a positioning boss 153. When the motor assembly 1 is placed in the installation position, it can be positioned by the positioning boss 153. For example, the positioning boss 153 is placed against the top surface of the support surface of the installation position. In this way, the motor assembly 1 can be quickly placed in place without multiple adjustments.

[0089] Please see Figure 9 and Figure 10 This application also provides an air conditioning indoor unit, including a chassis 2, a cross-flow fan, a heat exchanger, and a motor assembly 1 of any of the above embodiments.

[0090] The chassis 2 is equipped with a volute 21 extending along the length of the chassis 2 and a motor mounting slot 2a located at one end of the volute 21, that is, the volute 21 extends along the left and right direction of the chassis 2. The motor assembly 1 is disposed in the motor mounting slot 2a and is supported on the side plate corresponding to the motor mounting slot 2a by two first support flanges 123.

[0091] A cross-flow fan is rotatably mounted inside the volute 21. A motor assembly 1 is located on one axial side of the cross-flow fan, with a power output shaft 112 extending into the volute 21 and rotatably connected to the cross-flow fan to drive its rotation. A heat exchanger extends along the length of the chassis 2 and is connected to it. Specifically, the heat exchanger is approximately an inverted V-shape with its opening facing downwards, surrounding the air inlet of the volute 21. The airflow, after heat exchange by the heat exchanger, enters the volute 21 under the action of the cross-flow fan.

[0092] The air conditioner indoor unit of this application embodiment can replace the original internal rotor motor with the motor assembly 1 of this application embodiment without changing the original structural design of the chassis 2 and related components. This means that product upgrades can be achieved without altering the existing manufacturing molds of the air conditioner indoor unit, reducing production costs. Furthermore, users are highly sensitive to the noise of air conditioner indoor units, and noise level is one of the performance indicators. Since the motor assembly 1 of this application embodiment uses an external rotor motor 11, it can output high torque, and has low noise and low cost, effectively reducing the noise of the air conditioner indoor unit and improving the user experience.

[0093] It should be noted that the motor mounting slot 2a is located outside the volute 21 and is isolated from the air duct inside the volute 21, that is, neither the mounting shell 12 nor the power unit 111 of the external rotor motor 11 extends into the volute 21.

[0094] The indoor unit of the air conditioner includes a frame assembly and an electrical control box. The electrical control box is mounted on the chassis 2 and located on the first axial side of the volute 21, meaning that the electrical control box and the motor mounting slot 2a are located on the same side of the volute 21. The periphery of the frame assembly is connected to the chassis. The heat exchanger and the electrical control box are housed within the space enclosed by the frame assembly and the chassis. It should be noted that the front of the frame assembly has a clearance notch to avoid obstructing the display area of ​​the electrical control box.

[0095] In one embodiment, please refer to Figure 8 and Figure 9 The chassis 2 has a water guide channel for collecting condensate generated by the heat exchanger and a water tank 202 connected to the water guide channel. The water guide channel surrounds the volute 21. The water tank 202 is connected to the lowest point of the water guide channel so that the condensate in the water guide channel can collect in the water tank 202. It should be noted that the water tank 202 is provided with a drain hole 202a, which can collect the water flowing out of the drain hole 202a into a drain pipe for discharge.

[0096] In this embodiment of the application, there are two water tanks 202, with one water tank 202 provided on the left front side and one on the right front side of the volute 21.

[0097] The water guiding channel includes a first water guiding sub-channel 201a, a second water guiding sub-channel 201b, a third water guiding sub-channel 201c, and a fourth water guiding sub-channel 201d. The first water guiding sub-channel 201a is located on the rear side of the volute 21 and extends along the length of the chassis 2. The first water guiding sub-channel 201a is located on the front side of the volute 21 and extends along the length of the chassis 2. The third water guiding sub-channel 201c is located on the second axial side of the volute 21 and extends along the front-rear direction of the chassis 2. The third water guiding sub-channel 201c is located on the first axial side of the volute 21 and extends along the front-rear direction of the chassis 2. The water holding tank 202 is located at the extension end of the second water guiding sub-channel 201b. That is to say, water holding tanks 202 are provided on both the left and right sides of the second water guiding sub-channel 201b.

[0098] Specifically, the condensate generated at the front end of the heat exchanger falls into the first water guide channel 201a, the condensate generated at the rear end of the heat exchanger falls into the second water guide channel 201b, the condensate generated at the left end of the heat exchanger falls into the third water guide channel 201c, and the condensate generated at the right end of the heat exchanger falls into the fourth water guide channel 201d.

[0099] The third water guide sub-channel 201c connects the second water guide sub-channel 201b and one of the water tanks 202, and the fourth water guide sub-channel 201d connects the second water guide sub-channel 201b and the other water tank 202. Specifically, the second water guide sub-channel 201b is higher than the water tank 202, and the condensate in the second water guide sub-channel 201b flows into the corresponding water tank 202 through the third water guide sub-channel 201c and the fourth water guide sub-channel 201d. The water flow in the first water guide sub-channel 201a also flows into the water tank 202.

[0100] Specifically, please refer to Figure 9 The side plate 2a′ of the motor mounting groove 2a near the volute 21 is spaced apart from the side wall 21′ of the volute 21 to form the aforementioned fourth water guide channel 201d. That is, the gap between the side plate 2a′ of the motor mounting groove 2a near the volute 21 and the side wall 21′ of the volute 21 serves as part of the water guide channel.

[0101] This application also provides an air conditioner, including an outdoor unit and an indoor unit of any of the above embodiments, wherein the outdoor unit and the indoor unit are connected by a refrigerant pipe.

[0102] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0103] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A motor assembly, characterized in that, include: An external rotor motor (11) includes a power unit (111) and a power output shaft (112). The power unit (111) includes an external rotor (1111) and a stator (1112) disposed within the external rotor (1111). The power output shaft (112) is connected to the external rotor (1111). A mounting housing (12) is fixedly connected to the stator (1112), the power unit (111) is disposed inside the mounting housing (12), at least one end of the power output shaft (112) extends out of the mounting housing (12), and the mounting housing (12) is provided with first support flanges (123) at opposite ends along the axial direction of the power output shaft (112), and the motor assembly is supported at the installation position by each of the first support flanges (123); The outer rotor (1111) is provided with a second support flange (11111) on the side opposite to the axial direction of the stator (1112), and one end of the power unit (111) is rotatably supported in the mounting shell (12) through the second support flange (11111). The stator (1112) has a third support flange (11121) on the side for connecting with the mounting housing (12). The power output shaft (112) passes through the third support flange (11121) and the third support flange (11121) extends into the corresponding first support flange (123). The motor assembly also includes a second bearing (14) housed in the third support flange (11121) and the second bearing (14) is sleeved on the power output shaft (112).

2. The motor assembly according to claim 1, characterized in that, One of the first support flanges (123) is hollow inside, and the second support flange (11111) extends into the first support flange (123).

3. The motor assembly according to claim 2, characterized in that, The motor assembly includes a first bearing (13), which is sleeved on the second support flange (11111) and is disposed between the first support flange (123) and the second support flange (11111).

4. The motor assembly according to claim 1, characterized in that, The mounting housing (12) includes a first housing (121) and a second housing (122) axially connected to the external rotor motor (11). The power unit (111) is located in the space enclosed by the first housing (121) and the second housing (122). One of the first support flanges (123) is disposed on the first housing (121), and the other of the first support flanges (123) is disposed on the second housing (122).

5. The motor assembly according to claim 4, characterized in that, One of the first shell (121) and the second shell (122) is provided with a buckle (1222), and the other is provided with a slot (121a), wherein the buckle (1222) and the slot (121a) are engaged.

6. The motor assembly according to claim 5, characterized in that, The slot (121a) is disposed on the first shell (121), the slot (121a) includes a communicating inlet sub-slot (121a′) and a locking sub-slot (121a″), the inlet sub-slot (121a′) extends axially along the first shell (121), the locking sub-slot (121a″) extends circumferentially from the end of the inlet sub-slot (121a′), the buckle (1222) protrudes from the circumferential surface of the second shell (122), and the buckle (1222) can enter the locking sub-slot (121a″) from the inlet sub-slot (121a′); the first shell (121) and the second shell (122) are fixedly connected by at least one screw.

7. The motor assembly according to claim 6, characterized in that, The first shell (121) is provided with a connecting piece (12121) extending radially outward, the connecting piece (12121) is provided with a through hole (121d), and the outer surface of the second shell (122) is provided with a protrusion (1223), and the screw passes through the through hole and is screwed into the protrusion (1223).

8. The motor assembly according to claim 4, characterized in that, The first shell (121) is provided with a first notch (121b), which penetrates the edge of the first shell (121) for docking with the second shell (122). The second shell (122) is provided with a second notch (122a), which penetrates the edge of the second shell (122) for docking with the first shell (121). The first notch (121b) and the second notch (122a) together form a wire passage groove, through which the wire (113) of the external rotor motor (11) passes.

9. The motor assembly according to claim 1, characterized in that, The motor assembly includes a vibration damping sleeve (15), which is sleeved on the first support flange (123).

10. An indoor unit for an air conditioner, characterized in that, include: The chassis (2) is provided with a volute (21) extending along the length of the chassis (2) and a motor mounting slot (2a) located at one end of the volute (21); A cross-flow fan is rotatably disposed within the volute (21); A heat exchanger is connected to the chassis (2), the heat exchanger extends along the length of the chassis (2), and the airflow after heat exchange by the heat exchanger enters the volute (21) under the action of the cross-flow impeller; And the motor assembly according to any one of claims 1-9, wherein the motor assembly is disposed in the motor mounting slot (2a) and supported on the side plate corresponding to the motor mounting slot (2a) by two first support flanges (123), and the power output shaft (112) extends into the volute (21) and is rotatably connected to the cross-flow fan to drive the cross-flow fan to rotate.

11. The indoor unit of the air conditioner according to claim 10, characterized in that, The chassis (2) has a water guide channel for collecting condensate from the heat exchanger and a water tank (202) connected to the water guide channel. The water guide channel surrounds the volute (21), and the condensate in the water guide channel can be collected into the corresponding water tank (202).

12. The indoor unit of the air conditioner according to claim 11, characterized in that, The side plate (2a′) of the motor mounting slot (2a) near the volute (21) is spaced apart from the side wall (21′) of the volute (21) to form part of the water guiding channel.

13. An air conditioner, characterized in that, It includes an outdoor air conditioning unit and an indoor air conditioning unit as described in any one of claims 10-12, wherein the outdoor air conditioning unit and the indoor air conditioning unit are connected by a refrigerant pipe.

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