Air pipe type air conditioner

Abstract

The utility model relates to the technical field of air conditioning equipment, in particular to an air pipe type air conditioner, an indoor unit of the air pipe type air conditioner comprises a machine shell provided with a machine shell air inlet and a machine shell air outlet, a machine shell containing cavity is formed in the machine shell, and the machine shell comprises a first side plate, is located at one end of the machine shell in the length direction and is provided with a via hole; the indoor heat exchanger is arranged in the housing accommodating cavity; the multiple centrifugal fans are coaxially arranged in the machine shell containing cavity in the length direction of the machine shell; the centrifugal fan comprises a volute and an impeller, the volute is arranged in the containing cavity of the machine shell and connected with the machine shell, and the impeller is rotationally arranged in the volute; the fan motor is arranged outside the first side plate and comprises an inner stator, an outer rotor and a motor rotating shaft, the outer rotor is arranged outside the inner stator in a surrounding mode, the outer rotor can rotate relative to the inner stator, the motor rotating shaft is connected with the outer rotor, penetrates through the via hole and extends into the machine shell containing cavity, and the motor rotating shaft is in transmission connection with the multiple impellers; and when the outer rotor rotates, the impellers are driven to rotate synchronously.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning equipment, in particular to a ducted air conditioner. BACKGROUND

[0002] Air conditioner refers to the device for adjusting and controlling the temperature, humidity, flow rate and other parameters of the air in the environment of a building or structure by artificial means.

[0003] At present, more and more people choose to install air conditioners indoors to regulate the temperature of indoor air. The ducted air conditioner is one of many types of air conditioners. Due to its high aesthetic degree, high cost performance and strong adaptability, the ducted air conditioner has become the first choice for more and more families when choosing an air conditioner.

[0004] In the prior art, the ducted air conditioner is usually driven by an inner rotor motor to rotate a centrifugal fan to provide circulating air volume to the indoor heat exchanger to complete heat exchange. The inner rotor motor has a large noise during operation, and the heat dissipation of the inner rotor motor is poor because the rotor is located inside the motor. When the inner rotor motor drives multiple fans, the motor is usually located at the middle position between the multiple fans. When the motor needs to be repaired or replaced, the operation is not convenient. Utility model content

[0005] The embodiments of the present application disclose a ducted air conditioner, which has small noise and good heat dissipation when the fan motor is running, and the repair operation is convenient when the fan motor needs to be repaired or replaced.

[0006] In order to achieve the above purpose, some embodiments of the present application provide a ducted air conditioner, comprising:

[0007] An indoor unit, the indoor unit comprising:

[0008] A shell, the shell being provided with a shell air inlet and a shell air outlet, and a shell accommodating cavity being formed in the shell, the shell comprising:

[0009] A first side plate, the first side plate being located at one end of the shell along the length direction, and the first side plate being provided with a through hole;

[0010] A partition plate, the partition plate being arranged in the shell accommodating cavity, the partition plate dividing the shell accommodating cavity into an air inlet cavity and an air outlet cavity, the air inlet cavity being in communication with the shell air inlet, and the air outlet cavity being in communication with the shell air outlet;

[0011] An indoor heat exchanger, the indoor heat exchanger being arranged in the air outlet cavity;

[0012] a plurality of centrifugal fans coaxially arranged in the air inlet cavity along the length direction of the casing, air inlets of the plurality of centrifugal fans being communicated with the air inlet cavity, air outlets of the plurality of centrifugal fans being communicated with the air outlet cavity, the centrifugal fan comprising:

[0013] a volute arranged in the casing accommodating cavity and connected with the casing;

[0014] a impeller rotationally arranged in the volute;

[0015] a fan motor arranged outside the first side plate, the fan motor comprising:

[0016] an inner stator;

[0017] an outer rotor arranged around the inner stator, the outer rotor being rotatable relative to the inner stator;

[0018] an end cover connected with the outer rotor;

[0019] a rotating shaft connected with the end cover and extending into the air inlet cavity through the through hole, the rotating shaft being drivingly connected with the plurality of impellers of the plurality of centrifugal fans respectively, so that the plurality of impellers are synchronously rotated when the outer rotor is rotated;

[0020] a bearing support located on the side of the plurality of centrifugal fans away from the fan motor along the length direction of the casing and detachably connected with the partition plate;

[0021] a rotating bearing arranged in the bearing support, and the end of the rotating shaft away from the fan motor is arranged in the rotating bearing.

[0022] Thus, since the outer rotor of the fan motor is arranged around the outside of the inner stator, the heat dissipation of the outer rotor is more effective, and the heat dissipation of the fan motor is better. Moreover, since the gap is arranged between the outer rotor and the inner stator, no mechanical friction is generated, so that the fan motor is more quiet during operation.

[0023] Moreover, the fan motor is arranged outside the first side plate of the casing, so that when the fan motor needs to be repaired, the fan motor can be directly repaired from the side of the first side plate of the casing without being disassembled, the operation space outside the first side plate is large, and the operation is convenient.

[0024] If the bearing support is connected to the upper top plate or the lower bottom plate of the shell, the operator needs to put his hand into the shell and bend his wrist upward or downward to operate when installing or dismounting the bearing support, and cannot directly observe the installation or dismounting of the bearing support. Therefore, the bearing support is detachably connected to the partition plate, so that the operator can directly operate the connection between the bearing support and the partition plate in the direction towards the partition plate, the visibility of the connection part of the bearing support and the partition plate is higher, the operator does not need to put his hand into the shell to operate the bearing support in an inconvenient manner, the assembly of the bearing support is more convenient and fast, and the assembly efficiency of the indoor unit is improved.

[0025] Meanwhile, if the bearing support is connected to the upper top plate or the lower bottom plate of the shell, the vibration generated by the centrifugal fan during the operation of the centrifugal fan is directly transmitted to the shell, which can cause resonance of other components in the indoor unit, and thus additional noise is generated. Therefore, the bearing support is connected to the partition plate, the vibration during the operation of the centrifugal fan is indirectly transmitted to the partition plate through the bearing support, and then indirectly transmitted to the shell through the partition plate, the vibration during the operation of the centrifugal fan is avoided to be directly transmitted to the shell, the resonance effect of other components in the indoor unit can be effectively reduced, the stability of the indoor unit is ensured, and the overall noise level of the indoor unit is reduced.

[0026] Since multiple centrifugal fans are adopted, the length of the rotating shaft increases. When the fan motor drives the rotating shaft to rotate, the end of the rotating shaft away from the fan motor is far away from the driving source, which can cause large vibration of the end of the rotating shaft away from the fan motor. The rotating connection between the rotating shaft and the bearing support provides support for the end of the rotating shaft away from the fan motor, avoids the vibration of the centrifugal fan connected to the end of the rotating shaft away from the fan motor, and ensures the stable operation of the centrifugal fan. The rotating bearing in the bearing support also provides accurate support for the rotation of the rotating shaft, which helps to further ensure the stability and reliability of the centrifugal fan during operation.

[0027] The application also provides a ducted air conditioner, which comprises:

[0028] An indoor unit, which comprises:

[0029] A shell, which is provided with a shell air inlet and a shell air outlet, and a shell accommodating cavity is formed in the shell, and the shell comprises:

[0030] A first side plate, which is located at one end of the shell in the length direction, and the first side plate is provided with a through hole;

[0031] A partition plate is arranged in the casing accommodating cavity, and the partition plate divides the casing accommodating cavity into an air inlet cavity and an air outlet cavity, the air inlet cavity is communicated with the casing air inlet, and the air outlet cavity is communicated with the casing air outlet;

[0032] An indoor heat exchanger is arranged in the air outlet cavity;

[0033] A plurality of centrifugal fans are coaxially arranged in the air inlet cavity along the length direction of the casing, the air inlets of the centrifugal fans are communicated with the air inlet cavity, the air outlets of the centrifugal fans are communicated with the air outlet cavity, and the centrifugal fan comprises:

[0034] A volute is arranged in the casing accommodating cavity and connected with the casing;

[0035] An impeller is rotationally arranged in the volute;

[0036] A fan motor comprises:

[0037] A motor shell is located outside the casing and detachably connected with the casing, and the motor shell forms a motor accommodating cavity;

[0038] An inner stator is arranged in the motor accommodating cavity and connected with the motor shell;

[0039] An outer rotor is located in the motor accommodating cavity, and the outer rotor is arranged outside the inner stator and can rotate relative to the inner stator;

[0040] An end cover is connected with the outer rotor;

[0041] A rotating shaft is connected with the end cover, and the rotating shaft penetrates the casing and extends into the air inlet cavity, and the rotating shaft is drivingly connected with a plurality of the impellers of the centrifugal fans, so that the plurality of the impellers are synchronously rotated when the outer rotor rotates;

[0042] A bearing support is located on the side of the centrifugal fans away from the fan motor along the length direction of the casing, and is detachably connected with the partition plate;

[0043] A rotating bearing is arranged in the bearing support, and one end of the rotating shaft away from the fan motor penetrates the rotating bearing.

[0044] Thus, since the motor shell of the fan motor is detachably connected outside the casing, the inner stator and the motor shell are connected together, and the outer rotor is arranged in the motor accommodating cavity of the motor shell, when the fan motor needs to be repaired, the fan motor can be directly repaired from the side of the casing outside without being disassembled, the operation space outside the casing is large, and the operation is convenient.

[0045] In some embodiments of the present application, the motor shell has a mounting opening towards the casing, and the inner stator and the outer rotor are mounted in the motor accommodating cavity through the mounting opening.

[0046] Thus, through the mounting opening arranged on the motor shell towards the casing, the inner stator and the outer rotor can conveniently enter the motor accommodating cavity through the mounting opening, thereby simplifying the installation process of the motor. When the internal components of the motor need to be disassembled or replaced, the maintenance personnel can easily take out the inner stator and the outer rotor through the mounting opening for necessary maintenance or replacement.

[0047] In some embodiments of the present application, the motor shell further comprises a first flange arranged along a circumference of the mounting opening.

[0048] Thus, the first flange serves as a connecting component between the motor shell and the casing, which not only can realize stable connection between the motor shell and the casing, but also can enhance the structural strength of the whole fan motor. The first flange is similar to a reinforcing ring, which is arranged around the mounting opening, can effectively resist external impact and vibration, and improve the stability and durability of the fan motor.

[0049] In some embodiments of the present application, the fan motor further comprises:

[0050] A second flange is arranged at one end of the inner stator away from the first side plate and is fixedly connected with the inner stator, and the second flange is connected with the motor shell.

[0051] Thus, the second flange serves as a connecting component between the inner stator and the motor shell, which can significantly enhance the structural strength of the whole fan motor, firmly connect the inner stator on the motor shell, and thereby improve the stability and durability of the fan motor.

[0052] In some embodiments of the present application, a threaded hole is arranged on the second flange.

[0053] A connecting hole is arranged on the motor shell.

[0054] The fan motor further comprises a fastener, and the fastener is connected through the threaded hole and the connecting hole.

[0055] In this way, by connecting the fasteners through the threaded holes and the connecting holes on the motor shell, a stable and reliable connection can be formed. This connection method can withstand a large tensile force and shear force, ensuring the firm connection between the inner stator and the motor shell, preventing loosening due to vibration or impact. The arrangement of threaded holes and connecting holes makes the installation process simpler and more intuitive. When the second flange needs to be disassembled or replaced, only the fasteners need to be removed to separate the second flange from the motor shell, reducing maintenance costs and time costs.

[0056] In some embodiments of the present application, the motor shell comprises:

[0057] a bottom plate;

[0058] a side plate arranged around the bottom plate, the second flange being connected to the bottom plate.

[0059] In this way, the bottom plate serves as the bottom support of the motor shell, providing a stable foundation for the entire fan motor. It can withstand the weight of the fan motor and the vibration and impact during operation, ensuring the stable operation of the fan motor. The side plate is arranged around the bottom plate and forms the main structure of the motor shell together with the bottom plate. This not only enhances the overall rigidity of the motor shell, but also improves its resistance to deformation, ensuring that the fan motor maintains a stable shape and size under various working conditions. The second flange is connected to the bottom plate, and the second flange, as a connecting component between the inner stator and the motor shell, also plays a role in transmitting and dispersing stress, improving the overall strength and durability of the fan motor.

[0060] In some embodiments of the present application, the bearing support comprises:

[0061] a support bottom plate connected to the partition plate by fasteners;

[0062] a support side plate connected to the support bottom plate, the support side plate being provided with a bearing mounting hole, and the rotary bearing being located in the bearing mounting hole.

[0063] In this way, the support bottom plate is connected to the partition plate by fasteners, making the connection between the bearing support and the partition plate more stable. The support bottom plate and the partition plate can be separated by removing the fasteners, making the disassembly process faster and facilitating subsequent maintenance and replacement of the bearing support. Moreover, the support side plate is provided with a bearing mounting hole, and the rotary bearing is located in the bearing mounting hole, ensuring the stability and reliability of the rotating shaft during rotation, reducing the failure caused by loose or worn bearings. The support side plate and the support bottom plate form a stable frame structure, which helps to improve the overall rigidity of the bearing support and enhance its ability to withstand external forces.

[0064] In some embodiments of the present application, the bracket bottom plate is arranged on the side of the bracket side plate away from the centrifugal fan.

[0065] In this way, the bracket bottom plate is prevented from being blocked by the rotating shaft of the centrifugal fan during installation or disassembly, ensuring that the bearing bracket can be normally installed and disassembled.

[0066] In some embodiments of the present application, the bearing bracket further comprises a positioning structure arranged on the bracket bottom plate, and the bracket bottom plate and the partition plate are pre-positioned by the positioning structure.

[0067] In this way, when the bearing bracket is installed, the positioning structure can be used to pre-position the bracket bottom plate and the partition plate, ensuring that the installation position of the bearing bracket is accurate. The installation position of the bearing bracket can be determined only by the positioning structure, and after pre-positioning, the bearing bracket can be connected by using fasteners, thereby improving the efficiency of the bearing bracket installation.

[0068] In some embodiments of the present application, the outer ring of the rotary bearing has a flange in the radial direction of the rotating shaft, and the flange abuts against the surface of the side of the bracket side plate away from the centrifugal fan.

[0069] The bearing bracket further comprises:

[0070] A bearing cover connected to the side of the bracket side plate away from the centrifugal fan, and the flange is pressed and fixed on the bracket side plate.

[0071] In this way, the bearing cover connected to the side of the bracket side plate away from the centrifugal fan can press and fix the flange of the rotary bearing on the bracket side plate, thereby limiting the rotary bearing in the axial direction and preventing the rotary bearing from coming out of the bearing mounting hole, ensuring the stability and reliability of the rotating shaft.

[0072] In some embodiments of the present application, the indoor unit further comprises:

[0073] A damping member arranged between the motor housing and the casing.

[0074] In this way, by arranging the damping member between the motor housing and the casing, the vibration generated during the operation of the fan motor can be effectively absorbed and alleviated, which helps to improve the operation stability of the indoor unit and reduce noise and component wear caused by vibration.

[0075] In some embodiments of the present application, the damping member is a rubber pad.

[0076] Therefore, the rubber pad can effectively absorb and disperse the vibration energy generated by the operation of the motor due to its high elasticity and good damping performance. The rubber pad not only has a damping performance, but also has a certain sound insulation effect. It can effectively isolate and weaken the noise generated by the motor vibration, and reduce the propagation of noise to the casing and the external environment.

[0077] In some embodiments of the present application, the impeller comprises:

[0078] A hub having a central hole;

[0079] A blade connected to the outer periphery of the hub;

[0080] The rotating shaft comprises:

[0081] A fan rotating shaft connected to the central holes of the plurality of hubs and capable of transmitting torque to the plurality of hubs;

[0082] A motor rotating shaft connected to the outer rotor, the motor rotating shaft being coaxially arranged with the fan rotating shaft and connected through a coupling.

[0083] Therefore, the motor rotating shaft and the fan rotating shaft are connected through the coupling, which facilitates disassembly and replacement. When the fan motor needs to be repaired or replaced, the motor rotating shaft and the fan rotating shaft can be easily separated by removing the coupling, thereby facilitating subsequent operations. Moreover, the fan rotating shaft is connected to the central holes of the plurality of hubs, which can form an integrated fan system, so that the plurality of impellers can rotate synchronously, thereby improving the energy transmission efficiency and conversion efficiency.

[0084] In some embodiments of the present application, the coupling comprises:

[0085] A coupling body having a shaft hole, the first end of the fan rotating shaft and the first end of the motor rotating shaft being respectively arranged at two ends of the shaft hole, the coupling body further having a first threaded hole and a second threaded hole, the first threaded hole and the second threaded hole being respectively communicated with the shaft hole;

[0086] A first threaded member threadedly matched with the first threaded hole to fasten the first end of the fan rotating shaft;

[0087] A second threaded member threadedly matched with the second threaded hole to fasten the first end of the motor rotating shaft.

[0088] Thus, the design of the shaft hole in the coupling body enables the first end of the fan shaft and the first end of the motor shaft to be respectively arranged in the two ends of the shaft hole, thereby achieving accurate alignment of the shafts and reducing vibration and noise caused by misalignment of the shafts, and improving the stability and reliability of the rotation of the shafts. Moreover, the first threaded member is threadedly connected with the first threaded hole, and the second threaded member is threadedly connected with the second threaded hole, thereby fastening the fan shaft and the motor shaft to the coupling body. This fastening method is simple and convenient, and can provide reliable connection strength, thereby ensuring that the shafts will not loosen or fall off during high-speed rotation.

[0089] In some embodiments of the present application, the part of the fan shaft for connecting with the central hole of the hub is provided with a flat position, and the central hole of the hub is shaped to match the flat position.

[0090] Thus, in the connection of the fan shaft and the hub, the flat position can ensure accurate alignment of the fan shaft and the central hole of the hub, so that the fan shaft can more directly transmit the torque transmitted by the fan motor to the hub, thereby reducing the loss of torque between the fan shaft and the hub during transmission, and further ensuring that the impeller is fully rotated under the driving of the fan shaft, thereby avoiding the problems of unstable connection and poor transmission caused by misalignment. The matching design of the flat position and the central hole of the hub makes the connection between the fan shaft and the hub more tight and stable, which reduces vibration and noise caused by loose connection or misalignment, and improves the stability and reliability of the system. In the case of high-speed rotation, the connection between the fan shaft and the hub can still be tight through the flat position, and it is not easy to loosen or fall off.

[0091] In some embodiments of the present application, the impeller comprises:

[0092] a hub having a central hole;

[0093] a blade connected to the outer periphery of the hub;

[0094] The shaft comprises:

[0095] a motor shaft connected to the outer rotor, and the motor shaft is connected to the central holes of a plurality of the hubs, and the motor shaft can transmit torque to a plurality of the hubs.

[0096] Thus, the motor shaft is directly connected to the central holes of a plurality of the hubs of the impeller, so that the torque can be directly and efficiently transmitted to each impeller. This design reduces the loss of energy during transmission, and improves the overall energy transmission efficiency of the system. Moreover, the design of directly connecting the motor shaft to the central holes of a plurality of the hubs of the impeller reduces the use of intermediate transmission components, which not only reduces the complexity and cost of the system, but also reduces the downtime caused by failure of the transmission components.

[0097] In some embodiments of the present application, the rotating shaft has a first blocking portion near one end of the bearing support, and the first blocking portion corresponds to the rotating bearing in the axial direction of the rotating shaft.

[0098] In this way, the axial position of the rotating shaft is effectively limited and fixed at the end surface of the rotating bearing during rotation, which can prevent the rotating shaft from moving axially to the side of the bearing support due to uneven force or vibration, thereby enhancing the stability of the rotating shaft. A stable rotating shaft can ensure the normal operation of the centrifugal fan, reduce noise and vibration caused by the rotating shaft, and improve the overall performance of the centrifugal fan.

[0099] In some embodiments of the present application, the rotating shaft is fixedly connected to the center of the end cover, and the outer rotor is connected to the inside of the end cover.

[0100] In this way, since the rotating shaft is fixedly connected to the center of the end cover and the outer rotor is connected to the inside of the end cover, the rotation of the rotating shaft driven by the outer rotor is more stable, reducing vibration and noise caused by axial movement of the rotating shaft, and improving the smoothness of the rotating shaft.

[0101] In some embodiments of the present application, the fan motor further comprises:

[0102] The stator bearing is arranged at the center of the inner stator;

[0103] The rotating shaft comprises:

[0104] The rotating shaft body is connected to the end cover:

[0105] The stator center shaft has a first end penetrating the stator bearing and a second end connected to the rotating shaft body.

[0106] In this way, the stator bearing is arranged at the center of the inner stator, and the stator center shaft is connected to the rotating shaft body, which realizes the connection between the inner stator and the outer rotor, ensures that the centers of the inner stator and the outer rotor are on the same axis, reduces vibration between the inner stator and the outer rotor, prolongs the service life of the fan motor, and the stator center shaft and the stator bearing also provide additional support for the inner stator.

[0107] In some embodiments of the present application, the rotating shaft body has a central hole, and the second end of the stator center shaft penetrates the central hole of the rotating shaft body.

[0108] Therefore, the stator center shaft is arranged in the center hole of the rotating shaft body, which provides additional support for the rotating shaft body, enhances the stability of the rotating shaft body during high-speed rotation, and ensures that the center of the stator center shaft and the rotating shaft body are on the same axis, which helps to reduce vibration and noise during operation of the fan motor and improve the overall performance of the fan motor.

[0109] In some embodiments of the present application, the rotating shaft body and the stator center shaft are integrally formed.

[0110] Therefore, the rotating shaft body and the stator center shaft are integrally formed, which ensures the coaxiality of the rotating shaft body and the stator center shaft, prevents the problem of the stator center shaft shaking due to the loose connection between the rotating shaft body and the stator center shaft, and ensures the stability of the fan motor during operation.

[0111] In some embodiments of the present application, the surface of the end cover facing the inner stator is provided with a second blocking part, and the second blocking part corresponds to the stator bearing in the axial direction of the rotating shaft.

[0112] Therefore, the second blocking part is provided, which makes the end cover more stable in structure. The axial correspondence relationship between it and the stator bearing effectively limits the movement of the rotating shaft integrally formed on the end cover to the inner stator side in the axial direction, thereby further enhancing the stability and reliability of the rotating shaft. This design helps to reduce noise and vibration caused by the shaking of the rotating shaft and improve the operating efficiency of the entire centrifugal fan.

[0113] In some embodiments of the present application, the second blocking part and the end face of the stator bearing have a first predetermined gap, and the surface of the end cover facing the inner stator and the inner stator have a second predetermined gap, and the first predetermined gap is smaller than the second predetermined gap in the axial direction of the rotating shaft.

[0114] Therefore, since the outer rotor is connected to the end cover, the second predetermined gap between the surface of the end cover facing the inner stator and the inner stator makes the outer rotor and the inner stator not contact, but there is some axial movement between the outer rotor and the inner stator. The first predetermined gap smaller than the second predetermined gap ensures that the outer rotor will not collide with the inner stator when the rotating shaft moves to the rightmost side in the axial direction, ensuring the normal operation of the fan motor.

[0115] In some embodiments of the present application, the rotating shaft is provided with an extension section near one end of the bearing support, the extension section extends into the rotating bearing, and the length of the extension section is greater than the width of the first predetermined gap.

[0116] Therefore, the length of the extending section of the rotating shaft extending into the rotary bearing is greater than the width of the first preset gap, so that when the rotating shaft moves axially to one side of the inner stator, when the end of the rotating shaft close to the inner stator abuts against the stator bearing, the end of the rotating shaft close to the bearing support is still located in the rotary bearing, so that the end of the rotating shaft close to the bearing support is prevented from being pulled out of the rotary bearing when moving, and the stable operation of the centrifugal fan is ensured.

[0117] In some embodiments of the present application, the shell further comprises a second side plate, the second side plate and the first side plate are arranged opposite along the axial direction of the rotating shaft; the indoor unit further comprises a distribution box, the distribution box is arranged on the second side plate, and the fan motor and the distribution box are electrically connected.

[0118] Therefore, if the distribution box is arranged inside the shell, the distribution box will occupy the internal space of the shell, resulting in a smaller arrangement space for other components arranged inside the shell, which may affect the normal operation of the other components. In addition, the arrangement of the distribution box inside the shell will occupy part of the axial space, so that the space for the air inlet of the centrifugal fan is reduced, which will affect the air inlet amount of the centrifugal fan. Therefore, the distribution box is arranged on the second side plate, so that the internal space of the shell is not occupied, the normal operation of other components is ensured, and the air inlet amount of the centrifugal fan is not affected. In addition, since the fan motor and the distribution box are arranged on the two sides of the shell respectively, the fan motor and the distribution box can be maintained respectively, which not only reduces the maintenance difficulty and improves the work efficiency, but also reduces the risk of equipment failure caused by improper maintenance. At the same time, since there is a certain distance between the distribution box and the fan motor, the risk of electrical interference and short circuit can be reduced, which helps to improve the electrical safety of the indoor unit and ensures the use safety of the user.

[0119] Compared with the prior art, the present application has at least the following beneficial effects:

[0120] The air duct type air conditioner provided by the embodiment of the application comprises an indoor unit, the indoor unit comprises a shell, an indoor heat exchanger, a plurality of centrifugal fans and a fan motor, the shell is provided with a shell air inlet and a shell air outlet, and a shell accommodating cavity is formed in the shell, the shell comprises a first side plate, the first side plate is located at one end of the shell along the length direction, the first side plate is provided with a through hole, the indoor heat exchanger is arranged in the shell accommodating cavity, the plurality of centrifugal fans are coaxially arranged in the shell accommodating cavity along the length direction of the shell, the plurality of centrifugal fans are configured to introduce air flow into the shell from the shell air inlet, and output the air flow to the outside from the shell air outlet after heat exchange by the indoor heat exchanger, the centrifugal fan comprises a volute and an impeller, the volute is arranged in the shell accommodating cavity and connected with the shell, and the impeller is rotatably arranged in the volute, the fan motor is arranged outside the first side plate, the fan motor comprises an inner stator, an outer rotor and a motor shaft, the outer rotor is arranged outside the inner stator, the outer rotor is rotatable relative to the inner stator, the motor shaft is connected with the outer rotor and extends into the shell accommodating cavity through the through hole, and the motor shaft is in driving connection with the plurality of impellers of the plurality of centrifugal fans respectively, so that the plurality of impellers are driven to rotate synchronously when the outer rotor rotates. In this way, the fan motor driving the centrifugal fan to rotate is arranged outside the first side plate at one end of the shell along the length direction, instead of being arranged between the plurality of centrifugal fans, so that the motor has a larger maintenance space when it needs to be repaired and replaced, the fan motor can be disassembled for maintenance without disassembling the shell or the centrifugal fan, which is more convenient and fast, and meanwhile, the fan motor can be maintained directly from the outside of the first side plate of the shell without being disassembled, thereby reducing the cost and time of maintaining the motor. BRIEF DESCRIPTION OF DRAWINGS

[0121] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0122] Figure 1 The structural schematic diagram of the air duct type air conditioner disclosed by the embodiment of the application is shown from one perspective.

[0123] Figure 2 The structural schematic diagram of the air duct type air conditioner disclosed by the embodiment of the application is shown from another perspective.

[0124] Figure 3 The exploded view of the indoor unit disclosed by the embodiment of the application is shown.

[0125] Figure 4 The structural schematic diagram of the first side plate disclosed by the embodiment of the application is shown.

[0126] Figure 5 The rear view of the indoor unit disclosed by the embodiment of the application is shown.

[0127] Figure 6 for Figure 5 sectional view of A-A in FIG. 1;

[0128] Figure 7 structure schematic diagram of a centrifugal fan disclosed by an embodiment of the present application;

[0129] Figure 8 structure schematic diagram of a fan motor disclosed by an embodiment of the present application from a perspective;

[0130] Figure 9 structure schematic diagram of a motor shell disclosed by an embodiment of the present application from a perspective;

[0131] Figure 10 structure schematic diagram of a motor shell disclosed by an embodiment of the present application from another perspective;

[0132] Figure 11 structure schematic diagram of a fan motor disclosed by an embodiment of the present application from another perspective;

[0133] Figure 12 structure schematic diagram of a bearing support disclosed by an embodiment of the present application;

[0134] Figure 13 connection schematic diagram of a fan long shaft disclosed by an embodiment of the present application;

[0135] Figure 14 structure schematic diagram of a coupling disclosed by an embodiment of the present application;

[0136] Figure 15 top view of an indoor unit disclosed by an embodiment of the present application;

[0137] Figure 16 for Figure 15 sectional view of B-B in FIG. 1;

[0138] Figure 17 for Figure 16 enlarged view of A in FIG. 1.

[0139] Explanation of Reference Signs:

[0140] 100 - ducted air conditioner; 101 - indoor unit;

[0141] 1 - shell; 1a - shell air inlet; 1b - shell air outlet; 10 - shell accommodating cavity; 10a - air inlet cavity; 10b - air outlet cavity; 11 - first side plate; 11a - through hole; 12 - partition plate; 13 - second side plate;

[0142] 2 - indoor heat exchanger;

[0143] 3 - centrifugal fan; 31 - volute; 32 - impeller; 321 - hub; 322 - blade;

[0144] 4 - fan motor; 41 - inner stator; 42 - outer rotor; 44 - motor housing; 44a - motor accommodating cavity; 44b - mounting port; 44c - connecting hole; 441 - bottom plate; 442 - side plate; 45 - first flange; 46 - second flange; 46a - threaded hole; 47 - fastener; 48 - end cover; 481 - second blocking part; 49 - stator bearing; 491 - stator center shaft;

[0145] 5 - rotating shaft; 51 - fan rotating shaft; 51a - flat position; 52 - motor rotating shaft; 53 - first blocking part; 54 - rotating shaft body;

[0146] 6 - bearing support; 61 - rotating bearing; 611 - flange; 62 - support bottom plate; 621 - positioning structure; 63 - support side plate; 63a - bearing mounting hole; 64 - bearing cover;

[0147] 7 - damping piece;

[0148] 8 - coupling; 81 - coupling body; 81a - shaft hole; 81b - first threaded hole; 81c - second threaded hole; 82 - first threaded part; 83 - second threaded part;

[0149] 9 - distribution box;

[0150] X - length direction; M - first preset gap; N - second preset gap. DETAILED DESCRIPTION

[0151] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0152] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0153] And, the above-mentioned partial terms, in addition to can be used to express the orientation or positional relationship, can also be used to express other meanings, for example, the term "upper" can also be used to express a certain dependent relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meaning of these terms in this application can be understood according to the specific circumstances.

[0154] In addition, the terms "mount", "set", "provided with", "connected", "connected" should be broadly understood. For example, it can be a fixed connection, a detachable connection, or a monolithic structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0155] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific type and structure may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated device, element or component. Unless otherwise stated, the meaning of "multiple" is two or more.

[0156] With the pursuit of indoor temperature, air conditioning has become the choice to meet people's demand for indoor temperature. Air conditioning, also known as air conditioner, refers to the device that artificially adjusts and controls the temperature, humidity, flow rate, etc. of the air in the environment of a building or structure. It can effectively adjust the indoor air temperature, humidity, flow rate, etc. and bring great convenience to people's life.

[0157] With the improvement of living quality and the change of aesthetic concept, people no longer just satisfy with the basic performance of air conditioner, but pay more attention to the coordination and unity of its appearance and indoor decoration style, the cost performance and the aesthetic degree after installation.

[0158] As one of the many types of air conditioners, ducted air conditioner (referred to as ducted air conditioner) usually adopts embedded design, and the indoor unit is hidden in the ceiling, only the air outlet and air return are exposed in the room. This hidden installation not only avoids the problem of occupying indoor space of traditional air conditioner, but also maintains the overall beauty of indoor decoration. In addition, ducted air conditioner can be applied to various house types and decoration styles. Whether it is a small or large house, whether it is a modern simple style or a Chinese classical style, ducted air conditioner can perfectly integrate with indoor decoration. In addition, ducted air conditioner can also meet the different needs of different rooms for temperature and humidity through zoned control. Therefore, ducted air conditioner has become the choice of more and more people because of its high aesthetic degree, strong adaptability, high cost performance and other characteristics.

[0159] The indoor unit of the ducted air conditioner is provided with a heat exchange assembly, a fan and a motor. The motor drives the fan to rotate to make the airflow outside the indoor unit enter the indoor unit from the air inlet of the indoor unit, and then the airflow is output to the indoor space through the air outlet of the indoor unit after flowing through the fan and being heat-exchanged by the indoor heat exchanger. In the related art, the motor of the indoor unit of the ducted air conditioner is selected to drive multiple centrifugal fans by using an inner rotor motor. The inner rotor motor is a kind of DC motor, the rotor of which is provided with permanent magnets, and the stator of which is provided with coils. The rotor and the stator of the inner rotor motor are usually closely combined to form a whole. The inner rotor motor is driven by electromagnetic induction, so that the motor generates relatively large vibration and noise due to the change of electromagnetic force in the motor. During operation, the temperature of the rotor rises. Since the rotor of the inner rotor motor is located in the motor, the heat dissipation performance of the inner rotor motor is poor. Moreover, the inner rotor motor in the related art is arranged at the middle position between the multiple centrifugal fans, and the rotating shaft of the inner rotor motor is fixedly connected with the rotating shaft of the fan. When the motor needs to be repaired or replaced, the motor becomes relatively difficult to disassemble and repair. The fan needs to be disassembled first before the motor can be disassembled. Moreover, the motor has a small operable space, which is not conducive to directly repairing the motor, and increases the maintenance cost and time.

[0160] Therefore, in the embodiments of the present application, an outer rotor motor is adopted, and the motor is arranged outside the first side plate of the casing of the indoor unit. The fan motor can be conveniently repaired or replaced. When the fan motor needs to be repaired, the motor can be directly repaired from the side of the casing without being disassembled. When the fan motor needs to be replaced, the motor can be disassembled from the outside of the casing, thereby providing a larger operable space for the repair personnel.

[0161] The technical solutions will be further described below with reference to the embodiments and the drawings.

[0162] Please refer to Figure 1 In an embodiment of the present application, a ducted air conditioner 100 is provided. The ducted air conditioner 100 includes an indoor unit 101. The indoor unit 101 is an important component of the ducted air conditioner 100. It performs the air conditioning cycle by using the air supply system and related heat exchange system. This cycle involves a series of processes, including air intake, heat exchange, airflow pushing and temperature regulation, so as to provide suitable temperature and air quality for the indoor space. The air supply system generates strong airflow to suck indoor air into the ducted air conditioner. The sucked air then flows through the heat exchange system to absorb the heat in the air, achieve the cooling effect, and transfer the heat to the refrigerant through the heat exchange process. The cold air after the heat exchange process is pushed back to the indoor space under the action of the air supply system, forming a cycle.

[0163] Through the circulation process, the temperature of the indoor space is adjusted, and the indoor air quality is improved through the circulation of the air flow, thereby providing a comfortable and healthy indoor environment for the user. In the embodiment, the indoor unit 101 is hung on the top of the indoor space.

[0164] The indoor unit 101 comprises a casing 1, and a casing accommodating cavity 10 is formed in the casing 1. Components such as a condenser are arranged in the casing accommodating cavity 10. The casing 1 is provided with a casing air inlet 1a for guiding the air flow into the interior of the casing 1 and a casing air outlet 1b for guiding the air flow to the indoor space.

[0165] As shown in Figure 4 , the casing 1 comprises a first side plate 11 located at one end of the casing 1 along the length direction X, and the first side plate 11 is provided with a through hole 11a.

[0166] As shown in Figure 5 and Figure 6 , the casing 1 further comprises a partition plate 12 arranged in the casing accommodating cavity 10. The partition plate 12 divides the casing accommodating cavity 10 into an air inlet cavity 10a and an air outlet cavity 10b. The air inlet cavity 10a is in communication with the casing air inlet 1a, and the air outlet cavity 10b is in communication with the casing air outlet 1b.

[0167] As shown in Figure 6 , the indoor unit 101 further comprises an indoor heat exchanger 2 arranged in the air outlet cavity 10b. The indoor heat exchanger 2 is used for heat exchange of the air flow. The indoor heat exchanger 2 is a heat exchanger. It utilizes the characteristics that the liquid low-temperature refrigerant is easy to evaporate at low pressure, absorbs the heat of the cooled medium, and lowers the temperature of the surrounding air, thereby achieving the refrigeration effect. The cold air cooled by the indoor heat exchanger 2 is sent back to the room through the air supply system, thereby providing a comfortable environment for the indoor space. Especially in the hot summer, the refrigeration effect of the indoor heat exchanger 2 can significantly reduce the indoor temperature and improve the living comfort of people.

[0168] In combination with Figure 2 and Figure 7 , the indoor unit 101 further comprises a plurality of centrifugal fans 3 coaxially arranged in the air inlet cavity 10a along the length direction X of the casing 1. The air inlets of the plurality of centrifugal fans 3 are in communication with the air inlet cavity 10a, and the air outlets of the plurality of centrifugal fans 3 are in communication with the air outlet cavity 10b. The centrifugal fans 3 are used for introducing the air flow into the casing 1 through the casing air inlet 1a and outputting the air flow outside through the casing air outlet 1b after heat exchange by the indoor heat exchanger 2. Through the centrifugal fans 3, the air flow can be introduced into the interior of the casing 1, and the air flow after heat exchange by the indoor heat exchanger 2 can be sent back to the indoor space under the action of the centrifugal fans 3.

[0169] As shown in Figure 7As shown, the centrifugal fan 3 comprises a volute 31 and an impeller 32, the volute 31 is arranged in the casing accommodating cavity 10 and connected with the casing 1, the volute 31 is one of the important components of the centrifugal fan 3, the volute 31 is used to guide the airflow, the volute 31 is designed with a specific volute shape, so that the airflow can rotate along the curve shape of the volute when flowing through the centrifugal fan 3, gradually accelerating, and the kinetic energy of the airflow increases when flowing through the volute 31. The impeller 32 is rotatably arranged in the volute 31, and the impeller 32 rotates to make the airflow flow in the casing 1.

[0170] In combination Figure 2 and Figure 8 , the indoor unit 101 further comprises a fan motor 4 arranged outside the first side plate 11, the fan motor 4 is used to drive the plurality of impellers 32 of the plurality of centrifugal fans 3 to rotate simultaneously.

[0171] As shown in Figure 8 , the fan motor 4 comprises an inner stator 41, an outer rotor 42 and an end cover 48, the outer rotor 42 is arranged outside the inner stator 41, the outer rotor 42 can rotate relative to the inner stator 41, and the end cover 48 is connected with the outer rotor 42.

[0172] The indoor unit 101 further comprises a rotating shaft 5 connected to the end cover 48 and extending into the air inlet cavity 10a through the hole 11a, the rotating shaft 5 is in driving connection with the plurality of impellers 32 of the plurality of centrifugal fans 3 respectively, so as to drive the plurality of impellers 32 to rotate synchronously when the outer rotor 42 rotates.

[0173] Since the outer rotor 42 of the fan motor 4 is arranged outside the inner stator 41, the heat dissipation of the outer rotor 42 is more effective, and the fan motor 4 has better heat dissipation. At the same time, since the gap is arranged between the outer rotor 42 and the inner stator 41, no mechanical friction is generated, so that the fan motor 4 is more quiet during operation.

[0174] Moreover, the fan motor 4 driving the centrifugal fan 3 to rotate is arranged outside the first side plate 11 at one end along the length direction X of the casing 1, so that when the fan motor 4 needs to be repaired, the fan motor 4 can be directly repaired from the side of the first side plate 11 of the casing 1 without disassembling the fan motor 4, the operation space outside the first side plate 11 is large, and the operation is convenient.

[0175] It is worth mentioning that the fan motor 4 selected by the embodiment of the present application is an outer rotor motor. Compared with an inner rotor motor, the rotor of the outer rotor motor is located outside the stator. Such a structure makes the outer rotor motor exhibit more stable characteristics when outputting torque and can provide higher torque, thereby ensuring that the centrifugal fan 3 can provide stronger wind power when operating at high speed. Moreover, since the rotor is located outside, the heat dissipation of the fan motor 4 is more effective, which can prolong the service life of the fan motor 4. In addition, the outer rotor motor has better stability and durability under high load, which can prolong the service life of the indoor unit 101. At the same time, the outer rotor motor is generally quieter than the inner rotor motor during operation, which can further reduce the noise generated by the fan motor 4 due to rotation. Moreover, the structure of the outer rotor motor is relatively simple and easy to disassemble and assemble, which can reduce the maintenance difficulty of the fan motor 4.

[0176] In combination with Figure 3 and Figure 5 , the indoor unit 101 further comprises a bearing support 6 located on the side of the plurality of centrifugal fans 3 away from the fan motor 4 along the length direction X of the casing 1 and detachably connected to the partition plate 12. The bearing support 6 is provided with a rotating bearing 61, and the rotating shaft 5 is arranged in the rotating bearing 61 and rotatably connected to the bearing support 6 through the rotating bearing 61.

[0177] Since the bearing support 6 is connected to the upper top plate or the lower bottom plate of the casing 1, the operator needs to stretch his hand into the casing 1 and bend his wrist upward or downward to operate during the installation or disassembly of the bearing support 6, and cannot intuitively observe the installation or disassembly of the bearing support 6. Therefore, the bearing support 6 is detachably connected to the partition plate 12, so that the operator can directly operate the connection between the bearing support 6 and the partition plate 12 in the direction toward the partition plate 12, and the visibility of the connection part of the bearing support 6 and the partition plate 12 is higher, which avoids the inconvenience of stretching the hand into the casing 1 to operate the bearing support 6, ensures the convenience and speed during the assembly of the bearing support 6, and is conducive to improving the assembly efficiency of the indoor unit 101.

[0178] Moreover, since a plurality of centrifugal fans 3 are adopted, the length of the rotating shaft 5 increases. When the fan motor 4 drives the rotating shaft 5 to rotate, the end of the rotating shaft 5 away from the fan motor 4 is far away from the driving source, which causes the end of the rotating shaft 5 away from the fan motor 4 to vibrate greatly. The rotating connection between the rotating shaft 5 and the bearing support 6 provides support for the end of the rotating shaft 5 away from the fan motor 4, avoids the vibration of the centrifugal fan 3 connected to the end of the rotating shaft 5 away from the fan motor 4, and ensures the stable operation of the centrifugal fan 3. The rotating bearing 61 in the bearing support 6 also provides accurate support for the rotation of the rotating shaft 5, which helps to further ensure the stability and reliability of the centrifugal fan 3 during operation.

[0179] Because the bearing support 6 itself has certain rigidity and stability, when the rotating shaft 5 of the centrifugal fan 3 rotates under the support of the bearing support 6, the vibration generated during the operation of the centrifugal fan 3 can be effectively reduced. At the same time, the vibration generated during the operation of the centrifugal fan 3 is directly transmitted to the shell 1, which can cause resonance of other components in the indoor unit 101, and thus additional noise. However, when the bearing support 6 is connected to the partition plate 12, the vibration during the operation of the centrifugal fan 3 is indirectly transmitted to the partition plate 12 through the bearing support 6, avoiding the direct transmission of the vibration during the operation of the centrifugal fan 3 to the shell 1, which can effectively reduce the resonance effect of other components in the indoor unit 101, thereby reducing the overall noise level of the indoor unit 101.

[0180] It should be noted that there are various ways of detachable connection between the bearing support 6 and the partition plate 12, such as threaded connection, buckle connection or pin connection, which are not limited in the embodiment.

[0181] In some embodiments, in combination with Figure 2 , Figure 9 and Figure 10 , the fan motor 4 further comprises a motor housing 44, which is located outside the shell 1 and detachably connected with the shell 1. The motor housing 44 forms a motor receiving cavity 44a, the inner stator 41 is arranged in the motor receiving cavity 44a and connected with the motor housing 44, and the outer rotor 42 is located in the motor receiving cavity 44a and surrounds the inner stator 41. The outer rotor 42 is rotatable relative to the inner stator 41. The motor shaft 52 is connected with the outer rotor 42, and the motor shaft 52 extends into the shell receiving cavity 10 through the shell 1 and is in driving connection with the plurality of impellers 32 of the plurality of centrifugal fans 3, so as to drive the plurality of impellers 32 to rotate synchronously when the outer rotor 42 rotates.

[0182] Since the motor housing 44 of the fan motor 4 is detachably connected outside the shell 1, the inner stator 41 and the motor housing 44 are connected together, and the outer rotor 42 is arranged in the motor receiving cavity 44a of the motor housing 44, when maintenance of the fan motor is required, the fan motor 4 can be directly maintained from the side outside the shell 1 without being disassembled, the operation space outside the shell 1 is large, and the operation is convenient.

[0183] In some embodiments, as shown in Figure 10 , the motor housing 44 has a mounting port 44b towards the shell 1, and the inner stator 41 and the outer rotor 42 are mounted in the motor receiving cavity 44a through the mounting port 44b of the motor housing 44.

[0184] The installation opening 44b provided on the motor housing 44 towards the casing 1 enables the inner stator 41 and the outer rotor 42 to conveniently enter the motor accommodating cavity 44a through the installation opening 44b of the motor housing 44, thereby simplifying the installation process of the inner stator 41 and the outer rotor 42 in the fan motor 4 and the motor housing 44. The maintenance personnel or production personnel can quickly complete the assembly of the fan motor 4 without complicated disassembly or adjustment. When the internal components of the fan motor 4 need to be disassembled or replaced, the maintenance personnel can easily take out the key components such as the inner stator 41 and the outer rotor 42 through the installation opening 44b of the motor housing 44 for necessary maintenance or replacement.

[0185] It should be noted that the shape of the installation opening 44b of the motor housing 44 can be circular, rectangular or other patterns, which are not specifically limited in the present embodiment. For example, as shown in Figure 10 , the shape of the installation opening 44b of the motor housing 44 is circular, which better fits the outer shape of the inner stator 41 and the outer rotor 42 of the fan motor 4, facilitating the installation of the inner stator 41 and the outer rotor 42.

[0186] In some embodiments, in combination with Figure 9 and Figure 10 , the motor housing 44 further comprises a first flange 45, which is arranged along a circumference of the installation opening 44b of the motor housing 44, and is used to connect the motor housing 44 and the casing 1.

[0187] The first flange 45 as a connecting component between the motor housing 44 and the casing 1 can enhance the overall structural strength of the fan motor 4. The first flange 45 is similar to a reinforcing ring arranged around the installation opening 44b of the motor housing 44, which can effectively resist external impact and vibration, and improve the stability and durability of the fan motor 4.

[0188] It can be understood that the first flange 45 is usually used in cooperation with a sealing gasket or sealing glue to ensure the isolation between the inside and outside of the motor. Through the arrangement of the first flange 45, it can more effectively prevent external pollutants such as dust and moisture from entering the inside of the fan motor 4, maintain the cleanliness and dryness of the inside of the fan motor 4, and prolong the service life of the fan motor 4.

[0189] In some embodiments, referring to Figure 9 to Figure 11 , the fan motor 4 further comprises a second flange 46, which is arranged at an end of the inner stator 41 away from the first side plate 11 and is fixedly connected with the inner stator 41, and the second flange 46 is connected with the motor housing 44.

[0190] The second flange 46 serves as a connecting component between the inner stator 41 and the motor housing 44, not only realizing the connection between the inner stator 41 and the motor housing 44, but also significantly enhancing the structural strength of the fan motor 4 as a whole, firmly connecting the inner stator 41 to the motor housing 44, thereby improving the stability and durability of the fan motor 4.

[0191] In some embodiments, in combination with Figure 2 and Figure 11 , the second flange 46 is provided with a threaded hole 46a, the motor housing 44 is provided with a connecting hole 44c, and the fan motor 4 further comprises a fastener 47 connected through the threaded hole 46a and the connecting hole 44c.

[0192] By connecting the threaded hole 46a and the connecting hole 44c through the fastener 47, a stable and reliable connection can be formed. This connection mode can withstand greater tension and shear force, ensuring the firm connection between the inner stator 41 and the motor housing 44, preventing loosening caused by vibration or impact. The provision of the threaded hole 46a and the connecting hole 44c makes the installation process simpler and more intuitive. When it is necessary to disassemble or replace the second flange 46, the second flange 46 and the motor housing 44 can be easily separated by simply disassembling the fastener 47, reducing maintenance cost and time cost.

[0193] It should be noted that the fastener 47 can be a screw, a threaded pin, a stud or other fasteners, which are not specifically limited in the present embodiment.

[0194] In some embodiments, in combination with Figure 9 and Figure 11 , the motor housing 44 comprises a bottom plate 441 and a side plate 442, the side plate 442 is arranged around the periphery of the bottom plate 441, and the second flange 46 is connected to the bottom plate 441.

[0195] The bottom plate 441 serves as the bottom support of the motor housing 44, providing a stable foundation for the entire fan motor 4. It can withstand the weight of the fan motor 4 and the vibration and impact during operation, ensuring the stable operation of the fan motor 4. The side plate 442 is arranged around the periphery of the bottom plate 441, together with the bottom plate 441 forming the main structure of the motor housing 44. This not only enhances the overall rigidity of the motor housing 44, but also improves its anti-deformation ability, ensuring that the fan motor 4 maintains stable shape and size under various working conditions. The second flange 46 is connected to the bottom plate 441, and the second flange 46, as a connecting component between the inner stator 41 and the motor housing 44, also plays a role in transmitting and dispersing stress, improving the overall strength and durability of the fan motor 4.

[0196] In some embodiments, in combination with Figure 12 and Figure 16The bearing support 6 comprises a support bottom plate 62, and the support bottom plate 62 is connected with the partition plate 12 through fasteners.

[0197] The support bottom plate 62 is connected with the partition plate 12 through fasteners, so that the connection between the bearing support 6 and the partition plate 12 is more stable, and the support bottom plate 62 can be separated from the partition plate 12 by detaching the fasteners, so that the disassembly process is faster, and the subsequent maintenance and replacement of the bearing support 6 are facilitated.

[0198] In some embodiments, the support bottom plate 62 of the bearing support 6 is arranged on the side of the support side plate 63 away from the centrifugal fan 3. If the support bottom plate 62 is arranged on the side close to the centrifugal fan 3, the rotating shaft 5 driving the centrifugal fan 3 to rotate will block the installation path of the bearing support 6, which is not convenient for the installation or disassembly of the bearing support 6. Therefore, the support bottom plate 62 is arranged on the side away from the centrifugal fan 3, so that the bearing support 6 is not blocked by the rotating shaft 5 during installation or disassembly, and the normal installation of the bearing support 6 is ensured.

[0199] In some embodiments, in combination with Figure 12 and Figure 16 The bearing support 6 further comprises a positioning structure 621 arranged on the support bottom plate 62, and the support bottom plate 62 is pre-positioned with the partition plate 12 through the positioning structure 621.

[0200] When the bearing support 6 is installed, the positioning structure 621 can be used to pre-position with the partition plate 12, so that the installation position of the bearing support 6 is accurate, and the installation position of the bearing support 6 can be determined only through the positioning structure 621. After pre-positioning, the bearing support 6 can be connected through fasteners, so that the installation and disassembly process of the bearing support 6 is more convenient, and the efficiency of the installation of the bearing support 6 is improved.

[0201] In addition, the partition plate 12 provides a stable support foundation for the entire bearing support 6, which ensures that the bearing support 6 can withstand various forces and vibrations generated during the operation of the centrifugal fan 3, thereby maintaining the stability of the centrifugal fan 3 during operation.

[0202] It should be noted that the positioning structure 621 can be a positioning protrusion, a positioning column, a positioning hole or other structures capable of positioning, that is, a positioning protrusion or a positioning column can be arranged on the partition plate 12, and a positioning hole can be formed on the support bottom plate 62, and the positioning protrusion or the positioning column can be arranged in the positioning hole to pre-position the support bottom plate 62 and the partition plate 12. Alternatively, a positioning hole can be formed on the partition plate 12, and a positioning protrusion or a positioning column can be arranged on the support bottom plate 62, and the specific arrangement is not limited in the present embodiment.

[0203] The bearing support 6 further comprises a support side plate 63 connected to the support bottom plate 62, and the support side plate 63 is provided with a bearing mounting hole 63a in which the rotary bearing 61 is located.

[0204] The support side plate 63 is provided with the bearing mounting hole 63a in which the rotary bearing 61 is located, which ensures the stability and reliability of the rotating shaft 5 during rotation and reduces the failure caused by loosening or wear of the rotary bearing 61. The support side plate 63 and the support bottom plate 62 form a stable frame structure, which helps to improve the overall rigidity of the bearing support 6 and enhance its ability to withstand external forces.

[0205] In some embodiments, in combination with Figure 3 and Figure 16 , the outer ring of the rotary bearing 61 has a flange 611 in the radial direction of the rotating shaft 5, and the flange 611 abuts against the surface of the side of the support side plate 63 away from the centrifugal fan 3.

[0206] The bearing support 6 further comprises a bearing cover 64 connected to the side of the support side plate 63 away from the centrifugal fan 3, and the flange 611 is pressed and fixed to the support side plate 63.

[0207] Since the rotary bearing 61 may be detached from the bearing mounting hole 63a of the support side plate 63 away from the centrifugal fan 3, the flange 611 of the rotary bearing 61 can be pressed and fixed on the support side plate 63 by the bearing cover 64 connected to the side of the support side plate 63 away from the centrifugal fan 3, thereby limiting the rotary bearing 61 in the axial direction, preventing the rotary bearing 61 from being detached from the bearing mounting hole 63a, and ensuring the stability and reliability of the rotating shaft 5.

[0208] In addition, the bearing cover 64 can effectively prevent impurities such as dust and moisture from entering the interior of the rotary bearing 61, thereby enhancing the sealing performance of the rotary bearing 61.

[0209] In some embodiments, the indoor unit 101 further comprises a damping member 7 arranged between the motor housing 44 and the casing 1. In this way, by arranging the damping member 7 between the motor housing 44 and the casing 1, the vibration generated during the operation of the fan motor 4 can be effectively absorbed and alleviated, which helps to improve the operation stability of the indoor unit 101 and reduce noise and component wear caused by vibration.

[0210] In some embodiments, in combination with Figure 2 and Figure 3The damping member 7 is a rubber pad. Because the rubber pad has high elasticity and good damping performance, it can effectively absorb and disperse the vibration energy generated by the operation of the fan motor 4. Moreover, the rubber pad not only has damping performance, but also has certain sound insulation effect. It can effectively isolate and weaken the noise generated by the vibration of the fan motor 4, reducing the spread of noise to the casing 1 and the external environment.

[0211] It is worth noting that the damping member 7 can be a rubber pad as described in the above embodiments, but also can be polyurethane, shockproof steel plate or other materials that can absorb vibration when the fan motor 4 is running. The present embodiment does not limit this. Exemplarily, the damping member 7 can be polyurethane, which is a high polymer material with excellent damping performance. The setting of the polyurethane damping member between the motor housing 44 and the casing 1 can effectively reduce the spread of vibration and noise. The damping member 7 can also be a shockproof steel plate, which is a metal material with good strength and corrosion resistance. The damping effect between the motor housing 44 and the casing 1 can be achieved by adopting a specific joint with a corrugated shape or adding a damping layer.

[0212] In some embodiments, as shown in Figure 7 The impeller 32 includes a hub 321 having a central hole, and the hub 321 is the main structure of the impeller 32.

[0213] The impeller 32 further includes blades 322 connected to the outer periphery of the hub 321, and the blades 322 can rotate with the hub 321 to achieve air outlet.

[0214] The rotating shaft 5 includes a fan rotating shaft 51 connected to the central holes of the plurality of hubs 321 and capable of transmitting torque to the plurality of hubs 321.

[0215] The rotating shaft 5 further includes a motor rotating shaft 52 connected to the outer rotor 42, and the motor rotating shaft 52 is coaxially arranged with the fan rotating shaft 51 and connected through the coupling 8.

[0216] The connection between the motor rotating shaft 52 and the fan rotating shaft 51 through the coupling 8 facilitates disassembly and replacement. When the fan motor 4 needs to be repaired or replaced, the motor rotating shaft 52 and the fan rotating shaft 51 can be easily separated by removing the coupling 8, thereby facilitating subsequent operations. Moreover, the fan rotating shafts 51 of the plurality of impellers 32 are connected as a whole to form an integral fan system, which enables the plurality of impellers 32 to rotate synchronously, improving the energy transmission efficiency and conversion efficiency. In addition, the fan rotating shaft 51 is connected to the central hole of the hub 321 and can transmit torque to the hub 321, which ensures efficient transmission of torque from the motor rotating shaft 52 to the fan rotating shaft 51, reducing energy loss in the transmission process.

[0217] In some embodiments, referring toFigure 13 and Figure 14 The coupling 8 includes a coupling body 81, a shaft hole 81a is arranged in the coupling body 81, the first end of the fan shaft 51 and the first end of the motor shaft 52 are respectively arranged in the two ends of the shaft hole 81a, the coupling body 81 is further provided with a first threaded hole 81b and a second threaded hole 81c, and the first threaded hole 81b and the second threaded hole 81c are respectively communicated with the shaft hole 81a.

[0218] The coupling 8 further includes a first threaded part 82, which is screwed with the first threaded hole 81b to fasten the first end of the fan shaft 51.

[0219] The coupling 8 further includes a second threaded part 83, which is screwed with the second threaded hole 81c to fasten the first end of the motor shaft 52.

[0220] In this way, the design of the shaft hole 81a in the coupling body 81 enables the first end of the fan shaft 51 and the first end of the motor shaft 52 to be respectively arranged in the two ends of the shaft hole 81a, thereby achieving accurate alignment of the shaft center, reducing vibration and noise caused by misalignment of the shaft center, and improving the stability and reliability of the rotation of the shaft.

[0221] Moreover, the first threaded part 82 is screwed with the first threaded hole 81b, and the second threaded part 83 is screwed with the second threaded hole 81c, so as to fasten the fan shaft 51 and the motor shaft 52 on the coupling body 81 respectively. This fastening method is not only simple and convenient, but also can provide reliable connection strength to ensure that the shafts will not loosen or fall off during high-speed rotation.

[0222] In addition, since the first threaded part 82 and the second threaded part 83 are connected with the coupling body 81 through screwing, the motor shaft 52, the fan shaft 51 and the coupling body 81 can be conveniently disassembled and replaced. When the shafts need to be repaired or replaced, the shafts and the coupling body 81 can be easily separated by simply unscrewing the corresponding threaded parts, thereby simplifying the maintenance process.

[0223] Specifically, the first threaded part 82 and the second threaded part 83 can be studs, the motor shaft 52 and the fan shaft 51 are inserted into the shaft hole 81a, and the studs corresponding to the first threaded hole 81b and the second threaded hole 81c are screwed into the corresponding threaded holes, so as to realize the connection between the motor shaft 52 and the fan shaft 51. Of course, the first threaded part 82 and the second threaded part 83 can also be screws, bolts, threaded pins and other fasteners with threads, which are not limited in the embodiment.

[0224] In some embodiments, in combination with Figure 7 and Figure 13The part of the fan rotating shaft 51 for connecting with the center hole of the hub 321 is provided with a flat part 51a, and the shape of the center hole of the hub 321 is matched with the flat part 51a.

[0225] The matching mode between the fan rotating shaft 51 and the hub 321 through the flat part 51a enables the fan rotating shaft 51 to directly transmit the torque transmitted by the fan motor 4 to the hub 321, so as to reduce the loss of the torque between the fan rotating shaft 51 and the hub 321 in the transmission process, and further ensures that the impeller 32 is fully rotated under the driving of the fan rotating shaft 51.

[0226] In addition, the flat part 51a as a kind of plane structure can provide accurate positioning function, and the matching design of the flat part 51a and the center hole of the hub 321 can ensure that the fan rotating shaft 51 is accurately aligned with the center hole of the hub 321, so that the connection between the fan rotating shaft 51 and the hub 321 is more closely and stably, which reduces the vibration and noise caused by loose or misalignment, and improves the stability and reliability of the system. In the case of high-speed rotation, the connection between the fan rotating shaft 51 and the hub 321 can still be closely connected, and it is not easy to appear loose or fall off.

[0227] At the same time, the design of the flat part 51a makes the cross-sectional shape of the fan rotating shaft 51 more reasonable, thereby enhancing its carrying capacity. In the case of high-speed rotation and bearing larger torque, the fan rotating shaft 51 can still maintain stable performance and is not easy to deform or break, which improves the service life and reliability of the fan rotating shaft 51, and reduces the maintenance time and maintenance cost caused by failure.

[0228] It is worth mentioning that the connection structure between the fan rotating shaft 51 and the hub 321 can be the key connection between the fan rotating shaft 51 and the hub 321, or the rubber gasket is used to realize the connection between the fan rotating shaft 51 and the hub 321, and the embodiment does not make specific limitation. When the fan rotating shaft 51 and the hub 321 are connected by the key, a matching key groove is formed on the fan rotating shaft 51 and the hub 321, and then the key is embedded to realize the connection. The cost of this connection mode is relatively low.

[0229] In some embodiments, the impeller 32 includes a hub 321, and the hub 321 has a center hole. The impeller 32 further includes a blade 322 connected to the outer periphery of the hub 321.

[0230] The rotating shaft 5 includes a motor rotating shaft 52 connected to the center holes of the hubs 321 of the plurality of impellers 32, and capable of transmitting torque to the hubs 321.

[0231] Since the motor shaft 52 is directly connected to the center hole of the hub 321 of the plurality of impellers 32, it enables the torque to be directly and efficiently transmitted to each impeller 32. This design reduces energy loss during transmission and improves the overall energy transmission efficiency of the system. Moreover, the design of the motor shaft 52 being directly connected to the center hole of the hub 321 of the plurality of impellers 32 reduces the use of intermediate transmission components, which not only reduces the complexity and cost of the system, but also reduces downtime and maintenance costs due to transmission component failures.

[0232] In some embodiments, referring to Figure 15 to Figure 16 , the end of the shaft 5 close to the bearing bracket 6 has a first blocking part 53, which corresponds to the rotating bearing 61 in the axial direction of the shaft 5. That is, when the first blocking part 53 on the shaft 5 contacts the end face of the rotating bearing 61, the first blocking part 53 can block the shaft 5 from moving further in the axial direction towards the bearing bracket 6.

[0233] With the first blocking part 53, the axial position of the shaft 5 during rotation is effectively limited and fixed at the end face of the rotating bearing 61, which can prevent the shaft 5 from moving axially to one side of the bearing bracket 6 due to uneven force or vibration, thereby enhancing the stability of the shaft 5. Stable shaft 5 can ensure the normal operation of the centrifugal fan 3, reduce noise and vibration caused by axial movement of the shaft 5, and improve the overall performance of the centrifugal fan 3.

[0234] In some embodiments, in combination with Figure 8 and Figure 16 , the shaft 5 is fixedly connected to the center of the end cover 48, and the outer rotor 42 is connected to the inside of the end cover 48.

[0235] Since the shaft 5 is fixedly connected to the center of the end cover 48 and the outer rotor 42 is connected to the inside of the end cover 48, the rotation of the shaft 5 driven by the outer rotor 42 is more stable, reducing vibration and noise caused by axial movement of the shaft 5, and improving the smoothness of the operation of the shaft 5.

[0236] In some embodiments, in combination with Figure 3 and Figure 17 , the fan motor 4 further comprises a stator bearing 49, which is arranged at the center of the inner stator 41.

[0237] The shaft 5 further comprises a shaft body 54 and a stator center shaft 491, the first end of the stator center shaft 491 is arranged in the stator bearing 49, and the second end of the stator center shaft 491 is connected to the shaft body 54.

[0238] The stator bearing 49 is arranged at the center of the inner stator 41, and the stator center shaft 491 is connected with the rotating shaft body 54, thereby realizing the connection between the inner stator 41 and the outer rotor 42, ensuring that the centers of the inner stator 41 and the outer rotor 42 are on the same axis, reducing the vibration between the inner stator 41 and the outer rotor 42, prolonging the service life of the fan motor 4, and the stator center shaft 491 and the stator bearing 49 also provide additional support for the inner stator 41.

[0239] In some embodiments, the rotating shaft body 54 has a central hole, and the second end of the stator center shaft 491 is arranged in the central hole of the rotating shaft body 54.

[0240] The stator center shaft 491 is arranged in the central hole of the rotating shaft 5, which provides additional support for the rotating shaft 5, enhances its stability when rotating at high speed, and also ensures that the centers of the stator center shaft 491 and the rotating shaft body 54 are on the same axis, which helps to reduce vibration and noise during operation of the fan motor 4 and improve the overall performance of the fan motor 4.

[0241] In some embodiments, the rotating shaft body 54 and the stator center shaft 491 are integrally formed. This ensures the coaxiality of the rotating shaft body 54 and the stator center shaft 491, prevents the problem of stator center shaft shaking due to loose connection between the rotating shaft body 54 and the stator center shaft 491, and ensures the stability of the fan motor 4 during operation.

[0242] In some embodiments, as shown in Figure 17 , the surface of the end cover 48 facing the inner stator 41 is provided with a second blocking part 481, and the second blocking part 481 corresponds to the stator bearing 49 in the axial direction of the rotating shaft 5.

[0243] The second blocking part 481 makes the end cover 48 more stable in structure. Its axial correspondence with the stator bearing 49 effectively limits the movement of the rotating shaft 5 integrally formed on the end cover 48 to the inner stator 41 side in the axial direction, thereby further enhancing the stability and reliability of the rotating shaft 5, which helps to reduce noise and vibration caused by the shaking of the rotating shaft 5, and further ensures the operation efficiency of the entire centrifugal fan 3.

[0244] In some embodiments, referring to Figure 17 , the second blocking part 481 and the end face of the stator bearing 49 have a first predetermined gap M, and the surface of the end cover 48 facing the inner stator 41 and the inner stator 41 have a second predetermined gap N in the axial direction of the rotating shaft 5, and the first predetermined gap M is smaller than the second predetermined gap N.

[0245] Since the outer rotor 42 is connected to the end cover 48, the surface of the end cover 48 facing the inner stator 41 and the inner stator 41 have a second preset gap N, so that the outer rotor 42 and the inner stator 41 do not contact, but there is a slight axial movement between the outer rotor 42 and the inner stator 41 along the rotation axis 5. The first preset gap M is smaller than the second preset gap N, which ensures that when the rotation axis 5 is axially moved to the rightmost side, the outer rotor 42 does not collide with the inner stator 41, ensuring the normal operation of the fan motor 4.

[0246] In some embodiments, the length of the rotation axis 5 extending into the rotary bearing 61 is greater than the width of the first preset gap M. Since the rotation axis 5 can move axially, during the axial movement of the rotation axis 5 to one side of the inner stator 41, the length of the rotation axis 5 extending into the rotary bearing 61 is greater than the width of the first preset gap M between the second blocking portion 481 and the end face of the stator bearing 49, so that when the end of the rotation axis 5 close to the inner stator 41 abuts against the stator bearing 49, the end of the rotation axis 5 close to the bearing bracket 6 is still located in the rotary bearing 61, ensuring that the end of the rotation axis 5 close to the bearing bracket 6 does not come out of the rotary bearing 61 during movement, thereby ensuring the stable operation of the centrifugal fan 3.

[0247] In some embodiments, referring to Figure 3 The shell 1 further comprises a second side plate 13, and the second side plate 13 and the first side plate 11 are oppositely arranged along the axial direction of the rotation axis 5.

[0248] The indoor unit 101 further comprises a distribution box 9, which is arranged outside the second side plate 13, and the fan motor 4 is electrically connected to the distribution box 9.

[0249] If the distribution box 9 is arranged inside the shell 1, the distribution box 9 will occupy the internal space of the shell 1, resulting in a smaller arrangement space for other components arranged inside the shell 1, which may affect the normal operation of other components. Moreover, the arrangement of the distribution box 9 inside the shell 1 will occupy part of the axial space, making the space for the centrifugal fan 3 to intake air smaller, which will affect the air intake amount of the centrifugal fan 3. Therefore, the distribution box 9 is arranged on the second side plate 13, which does not occupy the internal space of the shell 1, ensures the normal operation of other components, and ensures that the air intake amount of the centrifugal fan 3 is not affected.

[0250] And, since the fan motor 4 and the distribution box 9 are respectively located at two sides of the shell 1, when maintenance and repair are performed, the fan motor 4 and the distribution box 9 can be separately maintained and repaired, avoiding the case that when the fan motor 4 and the distribution box 9 are located at the same side, the distribution box 9 needs to be removed before the fan motor 4 is repaired, which not only reduces the maintenance difficulty and improves the work efficiency, but also reduces the risk of equipment failure caused by improper maintenance. The distribution box 9 is arranged outside the second side plate 13, so that electrical connection and inspection can be more conveniently performed. At the same time, since there is a certain distance between the distribution box 9 and the fan motor 4, the risk of electrical interference and short circuit can be reduced, which helps to improve the electrical safety of the indoor unit 101 and ensure the use safety of the user.

[0251] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A ducted air conditioner characterized by comprising: Comprising: The indoor unit comprises: A casing provided with a casing air inlet and a casing air outlet, and a casing accommodating cavity is formed in the casing, the casing comprises: A first side plate located at one end of the casing along the length direction, the first side plate is provided with a through hole; A partition plate arranged in the casing accommodating cavity, the partition plate separates the casing accommodating cavity into an air inlet cavity and an air outlet cavity, the air inlet cavity communicates with the casing air inlet, and the air outlet cavity communicates with the casing air outlet; An indoor heat exchanger arranged in the air outlet cavity; A plurality of centrifugal fans coaxially arranged in the air inlet cavity along the length direction of the casing, the air inlets of the plurality of centrifugal fans communicate with the air inlet cavity, the air outlets of the plurality of centrifugal fans communicate with the air outlet cavity, and the centrifugal fan comprises: A volute arranged in the casing accommodating cavity and connected with the casing; An impeller rotationally arranged in the volute; A fan motor arranged on the first side plate, the fan motor comprises: An inner stator located outside the first side plate; An outer rotor arranged outside the inner stator and rotatable relative to the inner stator; An end cover connected with the outer rotor; A rotating shaft connected with the end cover and extending into the air inlet cavity through the through hole, and the rotating shaft is in driving connection with a plurality of impellers of the plurality of centrifugal fans respectively to drive the plurality of impellers to rotate synchronously when the outer rotor rotates; A bearing support located at a side of the plurality of centrifugal fans away from the fan motor along the length direction of the casing and detachably connected with the partition plate; A rotary bearing arranged in the bearing support, and an end of the rotating shaft away from the fan motor is arranged in the rotary bearing.

2. A ducted air conditioner characterized by comprising: Comprising: The indoor unit comprises: A casing provided with a casing air inlet and a casing air outlet, and a casing accommodating cavity is formed in the casing, the casing comprises: A first side plate located at one end of the casing along the length direction, the first side plate is provided with a through hole; A partition plate arranged in the casing accommodating cavity, the partition plate separates the casing accommodating cavity into an air inlet cavity and an air outlet cavity, the air inlet cavity communicates with the casing air inlet, and the air outlet cavity communicates with the casing air outlet; An indoor heat exchanger arranged in the air outlet cavity; A plurality of centrifugal fans coaxially arranged in the air inlet cavity along the length direction of the casing, the air inlets of the plurality of centrifugal fans communicate with the air inlet cavity, the air outlets of the plurality of centrifugal fans communicate with the air outlet cavity, and the centrifugal fan comprises: A volute arranged in the casing accommodating cavity and connected with the casing; An impeller rotationally arranged in the volute; A fan motor comprising: A motor housing is located outside the casing and detachably connected with the casing, and forms a motor accommodating cavity; An inner stator is arranged in the motor accommodating cavity and connected with the motor housing; An outer rotor is located in the motor accommodating cavity and arranged outside the inner stator, and the outer rotor is rotatable relative to the inner stator; An end cover is connected with the outer rotor; A rotating shaft is connected with the end cover and extends into the air inlet cavity through the through hole, and the rotating shaft is in driving connection with the impellers of the centrifugal fans respectively, so that the impellers are synchronously rotated when the outer rotor rotates; A bearing support is located on the side of the centrifugal fans away from the fan motor along the length direction of the casing and detachably connected with the partition plate; A rotating bearing is arranged in the bearing support, and the end of the rotating shaft away from the fan motor is arranged in the rotating bearing.

3. The duct type air conditioner according to claim 2, wherein The motor housing has a mounting opening towards the casing, and the inner stator and the outer rotor are mounted in the motor accommodating cavity through the mounting opening.

4. The duct type air conditioner according to claim 3, wherein The motor housing further comprises a first flange arranged along the circumference of the mounting opening, and the first flange is used for connecting the motor housing with the first side plate.

5. The duct type air conditioner according to claim 2, wherein The fan motor further comprises: A second flange is arranged at the end of the inner stator away from the first side plate and fixedly connected with the inner stator, and the second flange is connected with the motor housing.

6. The ducted air conditioner according to claim 5, wherein: A threaded hole is arranged on the second flange; A connecting hole is arranged on the motor housing; The fan motor further comprises: A fastener is connected with the threaded hole and the connecting hole.

7. The ducted air conditioner according to claim 5, wherein The motor housing comprises: A bottom plate; A side plate is arranged around the circumference of the bottom plate, and the second flange is connected with the bottom plate.

8. The ducted air conditioner according to claim 1 or 2, wherein: The bearing support comprises: A support bottom plate is connected with the partition plate through a fastener; A support side plate is connected with the support bottom plate, and the support side plate is provided with a bearing mounting hole, and the rotating bearing is located in the bearing mounting hole.

9. The ducted air conditioner according to claim 8, wherein: The support bottom plate is arranged on the side of the support side plate away from the centrifugal fan.

10. The ducted air conditioner according to claim 8, wherein The bearing support further comprises: A positioning structure is arranged on the support bottom plate, and the support bottom plate and the partition plate are pre-positioned through the positioning structure.

11. The ducted air conditioner according to claim 8, wherein: An outer ring of the rotating bearing has a flange along the radial direction of the rotating shaft, and the flange abuts against the surface of the side of the support side plate away from the centrifugal fan; The bearing support further comprises: A bearing cover is connected with the side of the support side plate away from the centrifugal fan and presses and fixes the flange on the support side plate.

12. The ducted air conditioner according to claim 2, wherein The indoor unit further comprises: A damping member is arranged between the motor housing and the casing.

13. The ducted air conditioner according to claim 12, wherein The damping member is a rubber pad.

14. The duct type air conditioner according to claim 1 or 2, wherein The impeller comprises: a hub having a central hole; a blade connected to the outer periphery of the hub; The rotating shaft comprises: a fan rotating shaft connected to the central holes of the plurality of hubs respectively and capable of transmitting torque to the plurality of hubs; a motor rotating shaft connected to the outer rotor, the motor rotating shaft being coaxially arranged with the fan rotating shaft and connected through a coupling.

15. The ducted air conditioner according to claim 14, wherein The coupling comprises: a coupling body having a shaft hole, the first end of the fan rotating shaft and the first end of the motor rotating shaft being respectively arranged in the two ends of the shaft hole, the coupling body further having a first threaded hole and a second threaded hole, the first threaded hole and the second threaded hole being respectively communicated with the shaft hole; a first threaded member threadedly engaged with the first threaded hole to fasten the first end of the fan rotating shaft; a second threaded member threadedly engaged with the second threaded hole to fasten the first end of the motor rotating shaft.

16. The ducted air conditioner according to claim 14, wherein The part of the fan rotating shaft for connecting with the central hole of the hub is provided with a flat portion, and the central hole of the hub is shaped to be matched with the flat portion.

17. The duct type air conditioner according to claim 1 or 2, wherein The impeller comprises: a hub having a central hole; a blade connected to the outer periphery of the hub; The rotating shaft comprises: a motor rotating shaft connected to the outer rotor, and the motor rotating shaft being connected to the central holes of the plurality of hubs respectively, the motor rotating shaft being capable of transmitting torque to the plurality of hubs.

18. The duct type air conditioner according to claim 1 or 2, wherein The rotating shaft has a first blocking portion at the end close to the bearing support, the first blocking portion corresponding to the rotary bearing in the axial direction of the rotating shaft.

19. The duct type air conditioner according to claim 1 or 2, wherein The rotating shaft is fixedly connected to the center of the end cover, and the outer rotor is connected to the end cover.

20. The ducted air conditioner according to claim 19, wherein The fan motor further comprises: a stator bearing arranged at the center of the inner stator; The rotating shaft comprises: a rotating shaft body connected to the end cover; a stator central shaft, the first end of the stator central shaft being arranged in the stator bearing, and the second end of the stator central shaft being connected to the rotating shaft body.

21. The ducted air conditioner according to claim 20, wherein The rotating shaft body has a central hole, and the second end of the stator central shaft is arranged in the central hole of the rotating shaft body.

22. The ducted air conditioner according to claim 20, wherein The rotating shaft body and the stator central shaft are integrally formed.

23. The ducted air conditioner according to claim 20, wherein The surface of the end cover facing the inner stator is provided with a second blocking portion, the second blocking portion corresponding to the stator bearing in the axial direction of the rotating shaft.

24. The ducted air conditioner according to claim 23, wherein The second blocking portion and the end surface of the stator bearing have a first preset gap, and the surface of the end cover facing the inner stator and the inner stator have a second preset gap, the first preset gap being smaller than the second preset gap in the axial direction of the rotating shaft.

25. The ducted air conditioner according to claim 24, wherein The length of the rotating shaft extending into the rotary bearing is greater than the width of the first preset gap.

26. The duct type air conditioner according to claim 1 or 2, wherein The casing further comprises a second side plate, the second side plate and the first side plate being oppositely arranged in the axial direction of the rotating shaft; The indoor unit further comprises: a distribution box arranged on the second side plate, the fan motor and the distribution box being electrically connected.

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