Air pipe type air conditioner

Abstract

The utility model relates to the technical field of air conditioning equipment, and discloses 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, and a machine shell containing cavity is formed in the machine shell; the indoor heat exchanger is arranged in the machine shell containing cavity. The centrifugal fan is arranged in the machine shell containing cavity, the centrifugal fan is used for leading airflow into the machine shell through the machine shell air inlet and outputting the airflow outwards through the machine shell air outlet after the airflow is subjected to heat exchange through the indoor heat exchanger, the centrifugal fan comprises a volute and an impeller, the volute is arranged in the machine shell containing cavity and connected with the machine shell, and a volute air inlet is formed in the axial end face of the volute; the impeller is rotationally arranged on the volute; the fan motor comprises a motor support, an inner stator and an outer rotor, and the motor support is connected to the axial end face of the volute and arranged outside the volute; the inner stator is arranged on the motor support, and an air inlet gap is formed between the inner stator and the volute air inlet. The outer rotor is arranged outside the inner stator in a surrounding mode, can rotate relative to the inner stator and is in transmission connection with the impeller.

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, namely air conditioner, can keep the air in the adjusted space at a certain temperature, humidity, flow speed, cleanliness and freshness.

[0003] At present, people will choose to install air conditioners at home in order to improve the comfort of the home. As a kind of air conditioner with high cost performance, beauty, low noise and convenient maintenance, ducted air conditioner will become an attractive option when users choose air conditioner.

[0004] In the prior art, most of the ducted air conditioners are driven by the inner stator motor to rotate the centrifugal fan, and provide air circulation to the indoor heat exchanger to complete heat exchange. The noise of the inner rotor motor during operation is large, and since the rotor is located inside the motor, the heat dissipation of the inner rotor motor is poor. And the fixing way of the inner rotor motor is usually connected with the shell of the air conditioner, and the motor will vibrate when it works due to the rotation of the rotor relative to the stator, which will cause the air conditioner to vibrate and produce noise when it works, thereby affecting the user experience. The air conditioner with corresponding fixing and damping structure of the motor will affect the air inlet of the fan due to the fixing structure of the motor, thereby increasing the energy consumption of the air conditioner and reducing the efficiency of the fan. Content of the utility model

[0005] The embodiment of the present application discloses a ducted air conditioner, which has small noise and good heat dissipation when the fan motor is running, and can reduce the influence of vibration caused by the operation of the fan motor on the stability of the indoor unit without affecting the air inlet of the centrifugal fan, thereby reducing the noise.

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

[0007] The indoor unit comprises:

[0008] The shell is provided with a shell air inlet and a shell air outlet, and a shell accommodating cavity is formed in the shell;

[0009] The indoor heat exchanger is arranged in the shell accommodating cavity;

[0010] The centrifugal fan is arranged in the shell accommodating cavity, and is configured to introduce airflow into the shell from the shell air inlet, and output the airflow outside from the shell air outlet after heat exchange by the indoor heat exchanger. The centrifugal fan comprises:

[0011] A volute is arranged in the accommodating cavity of the casing and connected with the casing, and an air inlet is arranged on the axial end surface of the volute;

[0012] A impeller is arranged in the volute and rotates;

[0013] A fan motor comprises:

[0014] A motor support is connected with the axial end surface of the volute and arranged outside the volute;

[0015] An inner stator is arranged in the motor support and along the axial direction of the fan motor, and an air inlet gap is formed between the inner stator and the air inlet of the volute, so that the air flow in the casing can pass through the air inlet gap and enter the air inlet of the volute;

[0016] An outer rotor is arranged outside the inner stator and can rotate relative to the inner stator;

[0017] An end cover is connected with the outer rotor;

[0018] A rotating shaft is connected with the end cover, connected with the outer rotor, and in driving connection with the impeller of the centrifugal fan, so that the impeller rotates synchronously when the outer rotor rotates.

[0019] Thus, the fan motor is connected with the end surface of the volute through the motor support, the transmission path of the vibration is the fan motor-motor support-volute-casing, the transmission path of the vibration is lengthened, the longer vibration path can continuously attenuate the vibration in the transmission process, thereby reducing the influence of the vibration generated by the fan motor in operation on the overall stability of the indoor unit and reducing the noise of the indoor unit in operation. Moreover, the air inlet gap is formed between the inner stator and the air inlet of the volute, when the centrifugal fan rotates, the air flow is introduced into the casing through the air inlet of the casing by the centrifugal fan, and introduced into the volute by the impeller through the air inlet gap between the inner stator and the air inlet of the volute and then flows out from the air outlet of the volute. When the air flow flows from the air outlet of the volute to the indoor heat exchanger, the air flow is heated or cooled after passing through the indoor heat exchanger and then output to the indoor by the centrifugal fan through the air outlet of the casing, and the air flow circulation is not affected by the fan motor at the air inlet of the volute.

[0020] The application further provides a ducted air conditioner, comprising:

[0021] An indoor unit comprises:

[0022] A casing is provided with an air inlet and an air outlet, and an accommodating cavity is formed in the casing;

[0023] An indoor heat exchanger is arranged in the casing accommodating cavity;

[0024] A centrifugal fan is coaxially arranged in the casing accommodating cavity along the length direction of the casing, and is configured to introduce air flow into the casing through the casing air inlet, and output the air flow outside through the casing air outlet after heat exchange by the indoor heat exchanger. The centrifugal fan comprises:

[0025] A volute is arranged in the casing accommodating cavity and connected with the casing, and a volute air inlet is arranged on the axial end surface of the volute;

[0026] An impeller is rotationally arranged in the volute;

[0027] A fan motor comprises:

[0028] A motor support is connected to the axial end surface of the volute and arranged outside the volute, and an air inlet hole is arranged on the motor support and in communication with the volute air inlet, so that the air flow in the casing can enter the volute air inlet through the air inlet hole;

[0029] An inner stator is arranged on the motor support outside the volute;

[0030] An outer rotor is arranged around the inner stator, and can rotate relative to the inner stator;

[0031] An end cover is connected with the outer rotor;

[0032] A rotating shaft is connected to the end cover, connected with the outer rotor, and in driving connection with the impeller of the centrifugal fan, so that the impeller rotates synchronously when the outer rotor rotates.

[0033] In this way, the fan motor is connected to the end surface of the volute through the motor support, and the vibration transmission path is the fan motor-motor support-volute-casing. The vibration transmission path is lengthened, and the longer vibration path can continuously attenuate the vibration in the transmission process, thereby reducing the influence of the vibration generated by the fan motor during operation on the overall stability of the indoor unit, reducing the noise of the indoor unit during operation, and the motor support is provided with an air inlet hole. Although the fan motor is arranged at the volute air inlet, when the centrifugal fan rotates, the air flow is introduced into the casing through the casing air inlet by the centrifugal fan, and is introduced into the volute by the impeller through the air inlet hole of the motor support and then flows out of the volute air outlet. When the air flow flows from the volute air outlet to the indoor heat exchanger, the air flow is heated or cooled by the indoor heat exchanger and then output to the indoor by the centrifugal fan through the casing air outlet, without affecting the flow of the air flow due to the motor at the volute air inlet.

[0034] In some embodiments of the present application, the motor support comprises:

[0035] a plurality of first legs, first ends of the plurality of first legs being connected to the inner stator, second ends of the plurality of first legs being connected to the axial end surface of the volute, an air inlet being formed between two adjacent first legs.

[0036] In this way, compared with a single first leg, the plurality of first legs can provide more stable support, and the plurality of first legs can reduce the vibration of the fan motor borne by a single first leg.

[0037] In some embodiments of the present application, the motor support further comprises:

[0038] a stator positioning plate, the stator positioning plate being arranged on a first end surface of the inner stator, the first end surface of the inner stator being an end surface of the inner stator facing away from the centrifugal fan, the stator positioning plate being provided with a plurality of limiting grooves, and the second ends of the plurality of first legs being arranged in the plurality of limiting grooves, respectively.

[0039] In this way, the plurality of first legs, the inner stator and the outer rotor can be connected into a whole through the stator positioning plate, which is more convenient for installing and disassembling the fan motor, and the limiting grooves on the stator positioning plate provide positioning of the first legs along the axial direction of the inner stator, which can improve the stability of the entire fan motor structure.

[0040] In some embodiments of the present application,

[0041] the first end surface of the inner stator is provided with a first connecting portion and a first positioning portion;

[0042] the stator positioning plate is provided with a second connecting portion and a second positioning portion;

[0043] the first connecting portion and the second connecting portion are connected through a fastener;

[0044] the inner stator and the stator positioning plate are pre-positioned through the first positioning portion and the second positioning portion.

[0045] In this way, the stator positioning plate and the inner stator can be pre-positioned through the first positioning portion and the second positioning portion when the stator positioning plate and the inner stator are installed, the stator positioning plate and the inner stator are connected through the fastener after pre-positioning, which makes the installation process more convenient and improves the assembly efficiency; the stator positioning plate and the inner stator can be separated by disassembling the fastener, which makes the disassembly process faster and facilitates subsequent maintenance and replacement of the fan motor.

[0046] In some embodiments of the present application,

[0047] The first connecting part comprises a first connecting hole;

[0048] The first positioning part comprises a first positioning column;

[0049] The second connecting part comprises a second connecting hole;

[0050] The second positioning part comprises a first positioning hole;

[0051] The fastener is a screw, and the fastener is connected through the first connecting hole and the second connecting hole;

[0052] The first positioning column is arranged in the first positioning hole along the axial direction of the centrifugal fan.

[0053] In this way, through the precise matching of the first positioning hole and the first positioning column, the accurate alignment of the stator positioning plate and the inner stator during the connection process can be ensured, the problem of loose connection or looseness caused by misalignment can be avoided, and the stability and reliability of the connection are improved. The screw is connected through the first connecting hole and the second connecting hole, and this connection method is not only simple and reliable, but also has high connection strength. By adjusting the fastening degree of the screw, the close connection between the stator positioning plate and the inner stator can be further ensured.

[0054] In some embodiments of the present application, the plurality of first legs are uniformly distributed along the circumference of the inner stator;

[0055] The plurality of limiting grooves are uniformly distributed along the circumference of the inner stator, and the plurality of first legs and the plurality of limiting grooves correspond one-to-one.

[0056] In this way, the uniform distribution of the plurality of limiting grooves along the circumference of the inner stator can enable the first legs to provide uniform support force to the inner stator. The vibration generated during the operation of the fan motor can be uniformly transmitted to each first leg, avoiding that one or some first legs bear too much pressure, prolonging the service life of the first legs, and in assembly, the uniform distribution of the first legs and the limiting grooves makes it easier for the operator to identify and align, reducing the probability of assembly errors.

[0057] In some embodiments of the present application, the portion between the first end and the second end of the first leg is an arc-shaped support rib.

[0058] In this way, the shape of the arc-shaped support rib enables the first leg to better bear the weight of the inner stator and the vibration generated during the operation of the fan motor. In addition, the arc-shaped support rib can absorb a part of the vibration energy through its elastic deformation, and the arc-shaped support rib can play a certain damping role, thereby reducing the generation of noise.

[0059] In some embodiments of the present application, the arc-shaped supporting rib comprises two opposite arc-shaped edges, and the two arc-shaped edges are provided with a flanging structure.

[0060] In this way, the flanging structure helps to improve the torsional performance of the arc-shaped supporting rib and increase the local carrying capacity of the arc-shaped supporting rib.

[0061] In some embodiments of the present application, the width of the air inlet gap is greater than or equal to 30 mm along the axial direction of the rotating shaft.

[0062] In this way, the air inlet gap with a width of 30 mm can provide sufficient space for the air flow to smoothly enter the volute, thereby reducing the influence of the fan motor arranged at the air inlet of the volute on the air inlet.

[0063] In some embodiments of the present application, the fan motor further comprises:

[0064] An adapter is connected between the rotating shaft and the end cover.

[0065] In this way, the adapter is connected to the end cover, and the rotating shaft is connected to the adapter. By arranging the adapter to replace the shaft coupling, the length of the fan motor in the axial direction is reduced, the overall structure of the fan motor is more compact, and the structural strength of the fan motor is improved.

[0066] In some embodiments of the present application,

[0067] The adapter has a central hole;

[0068] The first end of the rotating shaft is arranged in the central hole, and the first end of the rotating shaft and the central hole can transmit torque.

[0069] In this way, the outer rotor is arranged around the inner stator, and the driving force of the outer rotor cannot be directly connected to the rotating shaft to transmit power. The adapter plays a role of transitional connection, so that the power from the outer rotor can be transmitted to the rotating shaft, thereby realizing the transmission connection between the outer rotor and the rotating shaft.

[0070] In some embodiments of the present application, the first end of the rotating shaft is provided with a flat portion, and the central hole is a flat hole.

[0071] In this way, the cooperation of the flat portion and the flat hole can realize accurate torque transmission, thereby reducing energy loss. In addition, the structure of the flat portion and the flat hole provides a clear assembly direction. The operator can insert the first end of the rotating shaft into the central hole of the adapter according to the shape of the flat portion and the flat hole, thereby reducing the difficulty and time of assembly. In addition, the cooperation of the flat portion and the flat hole can ensure the assembly accuracy between the rotating shaft and the adapter.

[0072] In some embodiments of the present application,

[0073] The adapter is provided with a third connecting part and a third positioning part;

[0074] The end cover is provided with a fourth connecting part and a fourth positioning part;

[0075] The third connecting part and the fourth connecting part are connected by a fastener;

[0076] The adapter and the end cover are pre-positioned by the third positioning part and the fourth positioning part.

[0077] In this way, during assembly of the centrifugal fan, the cooperation of the third positioning part and the fourth positioning part provides a positioning reference for assembly of the adapter and the end cover. The operator can pre-position the adapter and the end cover through the third positioning part and the fourth positioning part, and after pre-positioning, the end cover and the adapter are assembled using a fastener, thereby improving assembly efficiency; the adapter and the end cover can be separated by disassembling the fastener, so that the disassembly process also becomes faster, facilitating subsequent maintenance and replacement of the fan motor.

[0078] In some embodiments of the present application,

[0079] The third positioning part comprises a second positioning hole;

[0080] The fourth positioning part comprises a second positioning column;

[0081] The second positioning column is arranged in the second positioning hole along the axial direction of the centrifugal fan.

[0082] In this way, through the precise cooperation of the second positioning hole and the second positioning column, the precise alignment of the adapter and the end cover during connection can be ensured, and the problem of loose connection or loosening due to misalignment can be avoided, thereby improving the stability and reliability of the connection.

[0083] In some embodiments of the present application, the centrifugal fan is a plurality of, the plurality of centrifugal fans are coaxially arranged along the length direction of the shell, and the shaft is respectively in driving connection with a plurality of the impellers of the plurality of centrifugal fans.

[0084] In this way, the plurality of centrifugal fans are coaxially arranged along the length direction of the shell, which can improve the air volume and air pressure of the entire indoor unit, and the airflow generated by the plurality of centrifugal fans is more evenly distributed in the shell. In addition, since the plurality of centrifugal fans share one shaft, the overall structure of the indoor unit is simplified.

[0085] In some embodiments of the present application, the fan motor is arranged on a first axial end surface of a first centrifugal fan, the first centrifugal fan being the centrifugal fan closest to the first end of the rotating shaft among the centrifugal fans, and the first axial end surface being the end surface of the first centrifugal fan facing away from the other centrifugal fans.

[0086] In this way, compared with arranging the fan motor between the centrifugal fans, arranging the fan motor on the first axial end surface of the first centrifugal fan can increase the heat dissipation space of the fan motor, and arranging the fan motor on the end surface of the first centrifugal fan can help simplify the structure of the centrifugal fans and reduce the difficulty in installation and maintenance.

[0087] In some embodiments of the present application, the indoor unit further comprises:

[0088] A bearing support connected to a second axial end surface of a second centrifugal fan, the second centrifugal fan being the centrifugal fan closest to the second end of the rotating shaft among the centrifugal fans, and the second axial end surface being the end surface of the second centrifugal fan facing away from the other centrifugal fans;

[0089] A rotating bearing arranged on the bearing support, and the second end of the rotating shaft extending into the rotating bearing.

[0090] In this way, since the centrifugal fans are adopted, the length of the rotating shaft is increased, and when the fan motor drives the rotating shaft to rotate, the second end of the rotating shaft is far away from the driving source, which can cause the second end of the rotating shaft to vibrate greatly. The rotating connection between the rotating shaft and the bearing support can provide support for the second end of the rotating shaft, avoid the centrifugal fan connected to the second end of the rotating shaft from vibrating, and ensure 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 further ensure the stability and reliability of the centrifugal fan during operation.

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

[0092] A bearing seat arranged outside the volute, and the rotating bearing is arranged on the bearing seat;

[0093] A plurality of second legs, first ends of the plurality of second legs being connected to the bearing seat, and second ends of the plurality of second legs being connected to the second axial end surface of the second centrifugal fan.

[0094] Thus, the bearing seat is arranged outside the volute and connected through the second legs, which can simplify the structure inside the volute, reduce the difficulty in installation and maintenance of the rotating bearing, and further enhance the stability of the rotating shaft and the bearing, reduce the influence of vibration of the rotating shaft on the overall stability of the indoor unit, and reduce the noise of the indoor unit during operation.

[0095] In some embodiments of the present application, the second legs are uniformly distributed along the circumference of the rotating shaft, and a gap is arranged between two adjacent second legs.

[0096] Thus, the air flow can be introduced into the impeller through the gap between the second legs, so as to reduce the influence of the bearing seat and the second legs on the air inlet.

[0097] In some embodiments of the present application, the second end of the rotating shaft is provided with a positioning shaft shoulder, which corresponds to the rotating bearing in the axial direction.

[0098] Thus, the positioning shaft shoulder can provide accurate axial positioning for the rotating bearing. During assembly, the positioning shaft shoulder can ensure the correct position of the rotating bearing on the rotating shaft, and when the rotating shaft rotates, the rotating shaft can be prevented from moving in the axial direction towards the rotating bearing.

[0099] In some embodiments of the present application, the fan motor further comprises:

[0100] The stator bearing is arranged at the center of the inner stator;

[0101] The surface of the outer rotor facing the inner stator is provided with an extension, which corresponds to the inner stator bearing in the axial direction.

[0102] Thus, the axial correspondence between the extension and the stator bearing provides axial positioning for the outer rotor, prevents the outer rotor from moving in the axial direction towards the inner stator, and maintains the stability of the internal structure of the fan motor.

[0103] Compared with the prior art, the present application has the following advantages:

[0104] The air duct type air conditioner provided by the embodiment of the present application has an indoor unit including a casing, an indoor heat exchanger, a centrifugal fan and a fan motor. The casing is provided with a casing air inlet and a casing air outlet, and a casing accommodating cavity is formed in the casing. The indoor heat exchanger is arranged in the casing accommodating cavity. The centrifugal fan is arranged in the casing accommodating cavity. The centrifugal fan is configured to introduce air flow into the casing from the casing air inlet, and output the air flow to the outside from the casing air outlet after heat exchange by the indoor heat exchanger. The centrifugal fan includes a volute and an impeller. The volute is arranged in the casing accommodating cavity and connected with the casing. The volute air inlet is arranged on the axial end surface of the volute. The impeller is rotatably arranged in the volute. The fan motor includes a motor support, an inner stator and an outer rotor. The motor support is connected to the axial end surface of the volute and arranged outside the volute. The inner stator is arranged on the motor support. An air inlet gap is formed between the inner stator and the volute air inlet. The outer rotor is arranged around the inner stator. The outer rotor is rotatable relative to the inner stator. The outer rotor is in transmission connection with the impeller. The end cover is connected with the outer rotor. The rotating shaft is connected to the end cover and in transmission connection with the impeller of the centrifugal fan, so as to drive the impeller to rotate synchronously when the outer rotor rotates.

[0105] In this way, the fan motor is connected to the axial end surface of the volute through the motor support, and the motor is arranged outside the volute. When the fan motor operates and generates vibration, the vibration is conducted to the volute through the motor support and then to the casing, thereby prolonging the transmission path of the vibration. The longer vibration path can make the vibration attenuate during the transmission process, thereby reducing the influence of the vibration generated by the fan motor on the overall stability of the indoor unit, increasing the stability of the indoor unit during operation, and reducing the noise generated by the indoor unit during operation. In addition, the air inlet gap is formed between the inner stator and the volute air inlet. When the centrifugal fan rotates, the air flow is introduced into the casing by the centrifugal fan through the casing air inlet, and then introduced into the volute by the impeller through the air inlet gap between the inner stator and the volute air inlet and then discharged from the volute air outlet. When the air flow flows from the volute air outlet to the indoor heat exchanger, the air flow is heated or cooled by the indoor heat exchanger and then output to the indoor unit by the centrifugal fan through the casing air outlet. The fan motor does not affect the flow of the air flow at the volute air inlet.

[0106] In addition, compared with arranging the fan motor in the volute through the motor support, arranging the fan motor outside the volute can directly observe and maintain the fan motor outside the volute without disassembling the fan motor from the volute during maintenance of the motor, thereby reducing the cost and time of maintaining the fan motor. BRIEF DESCRIPTION OF DRAWINGS

[0107] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0108] Figure 1 A structural schematic diagram of the ducted air conditioner from one perspective according to the embodiments of the present application;

[0109] Figure 2 A structural schematic diagram of the ducted air conditioner (with part of the casing omitted) according to the embodiments of the present application;

[0110] Figure 3 A structural schematic diagram of the ducted air conditioner from another perspective according to the embodiments of the present application;

[0111] Figure 4 A sectional view of A-A of the ducted air conditioner in Figure 3

[0112] Figure 5 A partial enlarged view of C in Figure 4

[0113] Figure 6 A partial enlarged view of D in Figure 4

[0114] Figure 7 A structural schematic diagram of the ducted air conditioner (with part of the casing and the indoor heat exchanger omitted) according to the embodiments of the present application;

[0115] Figure 8 A partial enlarged view of B in Figure 7

[0116] Figure 9 An exploded view of the first centrifugal fan, the motor support and the fan motor in the ducted air conditioner in Figure 2

[0117] A structural schematic diagram of the ducted air conditioner from another perspective according to the embodiments of the present application; Figure 10 Figure 9 An exploded view of the outer rotor, the inner stator, the adapter and the stator positioning plate according to the embodiments of the present application;

[0118] Figure 11 A structural schematic diagram of the first supporting leg, the inner stator and the stator positioning plate according to the embodiments of the present application;

[0119] Figure 12

[0120] Figure 13 ​​​​​​A structural schematic view of the stator positioning plate disclosed by the embodiment of the present application;

[0121] Figure 14 An exploded view of the rotating shaft, the adapter and the outer rotor disclosed by the embodiment of the present application;

[0122] Figure 15 A structural schematic view of the first or second supporting leg disclosed by the embodiment of the present application; Figure 14 A structural schematic view of the first or second supporting leg disclosed by the embodiment of the present application from another perspective;

[0123] Figure 16 An exploded view of the volute, the plurality of second supporting legs, the rotating shaft, the rotating bearing and the bearing seat disclosed by the embodiment of the present application;

[0124] Figure 17 An exploded view of the volute, the plurality of second supporting legs, the rotating shaft, the rotating bearing and the bearing seat disclosed by the embodiment of the present application;

[0125] Figure 18 A structural schematic view of the first or second supporting leg disclosed by the embodiment of the present application from another perspective; Figure 17 A structural schematic view of the first or second supporting leg disclosed by the embodiment of the present application from another perspective.

[0126] Explanation of reference numerals:

[0127] 100 - ducted air conditioner;

[0128] 101 - indoor unit;

[0129] 1 - casing; 1a - casing accommodating cavity;

[0130] 2 - indoor heat exchanger;

[0131] 3 - centrifugal fan; 31 - volute; 31a - volute air inlet; 32 - impeller; 311 - first centrifugal fan; 312 - second centrifugal fan;

[0132] 4 - fan motor; 41 - motor support; 41a - air inlet hole; 411 - first supporting leg; 4111 - first end of the first supporting leg; 4112 - second end of the first supporting leg; 4113 - arc-shaped supporting rib; 4114 - arc-shaped edge; 412 - stator positioning plate; 4121 - limiting groove; 412a - first positioning hole; 412b - second connecting hole; 42 - inner stator; 421 - first end face; 4211 - first positioning column; 421a - first connecting hole; 43 - outer rotor; 431 - extension; 44 - end cover; 441 - second positioning column; 45 - adapter; 45a - central hole; 45b - second positioning hole; 46 - rotating shaft; 461 - first end of the rotating shaft; 462 - second end of the rotating shaft; 4621 - positioning shaft shoulder; 463 - flat position; 47 - stator bearing;

[0133] 5 - bearing support; 51 - bearing seat; 52 - second supporting leg;

[0134] 6 - rotating bearing;

[0135] 10-fastener. DETAILED DESCRIPTION

[0136] 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 of ordinary skill in the art without any creative work fall within the scope of protection of the present application.

[0137] In the present application, the terms "upper", "lower", "top", "bottom", "inner", "vertical", "horizontal" 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 intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0138] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific situation.

[0139] In addition, the terms "provided with", "provided with", "connected" should be understood broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two devices, elements or components. Those of ordinary skill in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific situation.

[0140] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0141] An air conditioner absorbs and releases heat by circulating refrigerant to change the state of the refrigerant in different components, including four processes: compression process: the air conditioner compressor compresses the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas; condensation process: the high-temperature and high-pressure refrigerant gas is cooled by the condenser to become high-pressure liquid; throttling process: the high-pressure liquid is decompressed by a throttling device (such as an expansion valve or a capillary tube) to become low-temperature and low-pressure liquid; evaporation process: the low-temperature and low-pressure refrigerant liquid absorbs heat in the evaporator to become low-temperature and low-pressure gas, thereby achieving the refrigeration effect.

[0142] At present, in order to improve the comfort of the home, many people will consider installing an air conditioner at home. The ducted air conditioner has many advantages such as high cost performance, beautiful appearance, low noise and convenient maintenance, so when users choose an air conditioner, the ducted air conditioner is often an extremely attractive choice.

[0143] However, under the prior art, most ducted air conditioners are driven by a motor to rotate a centrifugal fan, thereby providing air circulation for the indoor heat exchanger to achieve heat exchange function. Usually, the motor is connected with the shell of the air conditioner, and when the motor operates, vibration will be generated due to the rotation of the rotor relative to the stator, which causes the air conditioner to vibrate and generate noise during operation, thereby affecting the user's experience. In addition, for those air conditioners with a specific motor fixing structure, the motor fixing structure will affect the air inlet of the fan, ultimately increasing the energy consumption of the air conditioner and reducing the efficiency of the fan.

[0144] Therefore, the embodiment of the present application discloses a ducted air conditioner which can reduce the influence of the vibration generated by the fan motor on the stability of the indoor unit without affecting the air inlet of the centrifugal fan.

[0145] The technical solutions of the present application will be further described below in combination with the embodiments and the drawings.

[0146] Please refer to Figure 1An embodiment of the present application provides a ducted air conditioner 100, which comprises an indoor unit 101. The indoor unit 101 is a part of the ducted air conditioner 100, and the indoor unit 101 is an air treatment box, mainly responsible for centrally processing indoor return air or fresh air in the indoor unit 101. The indoor unit 101 mainly comprises a compressor, an evaporator, a condenser and an expansion valve. A refrigeration cycle comprises a series of processes: evaporation, heat exchange, condensation and circulation. In the evaporation process, liquid refrigerant enters the evaporator through the expansion valve. Because the space in the evaporator suddenly increases, the pressure decreases, and the liquid refrigerant rapidly vaporizes and absorbs a large amount of heat. In the heat exchange process, the centrifugal fan 3 of the indoor unit 101 blows indoor air from the evaporator, and the air exchanges heat with the surface of the evaporator, so that the heat of the air is absorbed by the evaporator, thereby reducing the temperature of the air. In the condensation process, the vaporized refrigerant gas is sucked into the compressor and compressed into high-temperature and high-pressure gas. The high-temperature and high-pressure gas enters the condenser, exchanges heat with the outside air, releases heat and changes into liquid. In the circulation process, the liquid refrigerant is depressurized and cooled by the expansion valve and then enters the evaporator again, preparing for the next evaporation. The indoor unit 101 mainly realizes the refrigeration effect on indoor air through heat exchange between the refrigerant and the air, so as to realize the adjustment of indoor temperature.

[0147] Referring to Figure 1 , the indoor unit 101 comprises a shell 1, the shell 1 is provided with a shell air inlet and a shell air outlet, and the shell 1 further forms a shell accommodating cavity 1a. The components such as the compressor and the expansion valve are arranged in the shell accommodating cavity 1a.

[0148] Referring to Figure 2 , the indoor unit 101 further comprises an indoor heat exchanger 2, the indoor heat exchanger 2 is one of core components of the indoor unit 101, and mainly functions to realize heat exchange with airflow flowing through the indoor heat exchanger 2. When the ducted air conditioner 100 cools, the indoor heat exchanger 2 serves as an evaporator, liquid refrigerant evaporates in the indoor heat exchanger 2, absorbs heat of surrounding air, and reduces the temperature of the air. When the ducted air conditioner 100 heats, the indoor heat exchanger 2 serves as a condenser, gaseous refrigerant condenses in the indoor heat exchanger 2, releases heat to surrounding air, and increases the temperature of the air.

[0149] As shown in Figure 2 , the indoor unit 101 further comprises a centrifugal fan 3, the centrifugal fan 3 is arranged in the shell accommodating cavity 1a, and the centrifugal fan 3 can introduce airflow into the shell 1 from the shell air inlet and output the airflow heated by the indoor heat exchanger 2 from the shell air outlet.

[0150] Specifically, referring to Figure 4The centrifugal fan 3 comprises a volute 31 and an impeller 32. The volute 31 is arranged in the housing accommodating cavity 1a and connected with the housing 1. The volute 31 is provided with a volute air inlet 31a on the axial end surface thereof. The impeller 32 is rotatably arranged in the volute 31. The volute 31 is one of the components of the centrifugal fan 3. The volute 31 guides the air processed by the indoor heat exchanger 2 to the air outlet and protects the impeller 32. The impeller 32 is one of the components of the centrifugal fan 3. The impeller 32 is usually composed of a series of curved blades. The impeller 32 can suck the indoor air into the indoor unit 101 through rotation, and then send the processed air back to the indoor unit to adjust the indoor air temperature.

[0151] As shown in Figure 4 The indoor unit 101 further comprises a fan motor 4. The fan motor 4 is drivingly connected with the impeller 32 to convert electric energy into mechanical energy and drive the impeller 32 to rotate, thereby guiding the airflow. The fan motor 4 specifically comprises a motor bracket 41, an inner stator 42, an outer rotor 43 and an end cover 44. The motor bracket 41 is connected to the axial end surface of the volute 31 and arranged outside the volute 31. The inner stator 42 is arranged on the motor bracket 41. An air inlet gap is formed between the inner stator 42 and the volute air inlet 31a along the axial direction of the fan motor 4. The outer rotor 43 is arranged around the inner stator 42 and can rotate relative to the inner stator 42. The end cover 44 is connected with the outer rotor 43. The main function of the motor bracket 41 is to fix and support the fan motor 4 to ensure the stability of the fan motor 4 during operation. The inner stator 42 and the outer rotor 43 are components of the fan motor 4. The inner stator 42 is arranged on the motor bracket 41, and the outer rotor 43 is arranged around the inner stator 42. The rotating magnetic field generated by the inner stator 42 drives the outer rotor 43 to rotate around the inner stator 42. It is worth mentioning that the air inlet gap between the inner stator 42 and the volute air inlet 31a can enable the airflow to enter the volute 31 from the air inlet gap.

[0152] The indoor unit 101 further comprises a rotating shaft 46. The rotating shaft 46 is connected with the end cover 44 of the fan motor 4 and drivingly connected with the impeller 32 of the centrifugal fan 3, so as to drive the impeller 32 to rotate synchronously when the outer rotor 43 rotates.

[0153] It can be understood that if the fan motor 4 is directly connected to the housing 1, the vibration generated by the fan motor 4 during operation will be directly transmitted to the housing 1, thereby causing the resonance of the housing 1. The vibration of the housing 1 will affect the stability of the indoor unit 101, cause the loosening and damage of other components in the housing 1, affect the service life of the indoor unit 101, and the vibration of the housing 1 will generate noise, affecting the user experience.

[0154] And the fan motor 4 is connected to the axial end surface of the volute 31 through the motor support 41, and the fan motor 4 generates vibration during operation, which is transmitted to the volute 31 connected to the fan motor 4, and then transmitted to the casing 1 through the volute 31. The vibration is gradually attenuated during transmission, thereby reducing the influence of the vibration generated by the fan motor 4 during operation on the stability of the casing 1, ensuring the service life of the indoor unit 101, and reducing noise.

[0155] And because the fan motor 4 is fixed to the outside of the volute 31 through the motor support 41, compared to fixing the fan motor 4 inside the volute 31, it can reduce the influence of the fan motor 4 on the incoming air. The airflow is introduced into the indoor unit 101 by the centrifugal fan 3 through the casing air inlet, and the airflow can enter the volute 31 through the air inlet gap formed between the inner stator 42 and the volute air inlet 31a, and flow from the volute 31 to the indoor heat exchanger 2 through the volute air outlet. After the indoor heat exchanger 2 performs heat exchange treatment on the airflow, it is output to the indoor environment through the casing air outlet. The fan motor 4 is not close to the volute air inlet 31a, which does not affect the normal flow of the airflow. Thus, the fan motor 4 is fixed to the axial end surface of the volute 31 through the motor support 41, and the air inlet gap is formed between the inner stator 42 and the volute air inlet 31a, which can reduce the influence of the vibration generated by the fan motor 4 during operation on the casing 1 of the indoor unit 101, ensure the structural stability of the indoor unit 101, and reduce noise.

[0156] It is worth mentioning that the fan motor 4 selected in the embodiment of the application is an outer rotor motor. Compared to an inner rotor motor, the outer rotor motor has better stability and durability under high load, which can prolong the service life of the indoor unit 101. In addition, 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, easy to disassemble and assemble, and relatively simple to maintain, which can reduce the maintenance difficulty of the indoor unit 101.

[0157] Please refer to Figure 8 , the motor support 41 includes a plurality of first legs 411, the first ends 4111 of the plurality of first legs are connected to the inner stator 42, the second ends 4112 of the plurality of first legs are connected to the axial end surface of the volute 31, and the air inlet holes 41a are formed between adjacent two first legs 411.

[0158] It can be understood that the plurality of first legs 411 can make the connection pressure between the inner stator 42 and the volute 31 be more evenly dispersed compared to a single first leg 411. If there is only a single first leg 411, the weight of the inner stator 42 and the vibration and torque generated when the fan motor 4 is running will all be concentrated on one first leg 411, which is easy to cause the local pressure to be too large, which can cause the first leg 411 to deform or the connection part to be damaged.

[0159] The plurality of first legs 411 can disperse the pressure to the area corresponding to each first leg 411, so that each first leg 411 bears a relatively small and uniform force, thereby improving the stability of the overall structure of the fan motor 4 and prolonging the service life of the fan motor 4.

[0160] It should be noted that the connection mode of the first leg 411 with the volute 31 and the inner stator 42 can be detachable connection, and the detachable connection mode of the first leg 411 with the volute 31 and the inner stator 42 can be various, such as threaded connection, buckle connection or pin connection, and the embodiment does not make specific limitation.

[0161] It should be noted that the number of the plurality of first legs 411 can be three, four or other numbers that can provide sufficient supporting force, and the number of the first legs 411 is not limited in the application.

[0162] In some embodiments, referring to Figure 9 The motor bracket 41 further comprises a stator positioning plate 412, which is arranged on the first end surface 421 of the inner stator 42, and the first end surface 421 of the inner stator 42 is the end surface of the inner stator 42 away from the centrifugal fan 3, referring to Figure 8 The stator positioning plate 412 is provided with a plurality of limiting grooves 4121, and the second ends 4112 of the plurality of first legs are arranged in the plurality of limiting grooves 4121, respectively.

[0163] The stator positioning plate 412 can connect the plurality of first legs 411 and the inner stator 42 into a whole during the assembly of the fan motor 4. By connecting the inner stator 42 to the stator positioning plate 412, the plurality of first legs 411 are connected to the first end surface 421 of the inner stator 42 through the limiting grooves 4121, and the outer rotor 43 is arranged around the inner stator 42, and then the fan motor 4 is connected to the volute 31 through the first legs 411, which simplifies the assembly process, improves the assembly efficiency, and improves the overall structural stability of the fan motor 4.

[0164] In addition, the shape and size of each limiting groove 4121 match the shape and size of the end of the first leg 411, so that the first leg 411 can be embedded in the limiting groove 4121, ensuring that the first leg 411 can be connected to the inner stator 42 at a predetermined position, thereby ensuring the stability of the support of the first leg 411 to the inner stator 42.

[0165] And during the operation of the fan motor 4, due to the influence of factors such as vibration and electromagnetic force, the first leg 411 may have a tendency to move, and the limiting groove 4121 can effectively limit the movement of the first leg 411, ensuring the normal operation of the fan motor 4 and avoiding faults caused by component movement.

[0166] The connection mode of the inner stator 42 and the stator positioning plate 412 has various modes, for example, it can be connected by welding or by setting an elastic buckle and the like. Alternatively, please refer to Figure 11 , the first end surface 421 of the inner stator 42 is provided with a first connecting part and a first positioning part; the stator positioning plate 412 is provided with a second connecting part and a second positioning part; the first connecting part and the second connecting part are connected by a fastener 10; and the inner stator 42 and the stator positioning plate 412 are pre-positioned by the first positioning part and the second positioning part.

[0167] Firstly, by the first positioning part and the second positioning part, the stator positioning plate 412 can be accurately installed on the first end surface 421 of the inner stator 42 when assembling the inner stator 42 and the stator positioning plate 412, thereby ensuring the relative position of the stator positioning plate 412 and the inner stator 42, avoiding additional vibration, friction and magnetic field distortion caused by improper relative position of the stator positioning plate 412 and the inner stator 42, reducing the wear and damage between the stator positioning plate 412 and the inner stator 42, thereby prolonging the service life of the fan motor 4.

[0168] Secondly, the first positioning part and the second positioning part can simplify the assembly process and reduce the assembly difficulty when assembling the stator positioning plate 412 and the inner stator 42. The operator can pre-position the stator positioning plate 412 and the inner stator 42 by the first positioning part and the second positioning part during assembly, and then connect the stator positioning plate 412 and the inner stator 42 by using the fastener 10 after pre-positioning, so that the installation process is more convenient and the assembly efficiency is improved; when the inner stator 42 needs to be maintained, the stator positioning plate 412 and the inner stator 42 can be separated by disassembling the fastener 10, so that the disassembly process also becomes faster, facilitating the subsequent maintenance and replacement of the fan motor 4.

[0169] Specifically, please refer to Figure 14 , the first connecting part comprises a first connecting hole 421a; the first positioning part comprises a first positioning column 4211; the second connecting part comprises a second connecting hole 412b; the second positioning part comprises a first positioning hole 412a; please refer toFigure 15 The fastener 10 is a screw, and the fastener is connected through the first connecting hole 421a and the second connecting hole 412b; the first positioning column 4211 is arranged in the first positioning hole 412a along the axial direction of the centrifugal fan 3.

[0170] It can be understood that when the first positioning column 4211 is inserted into the first positioning hole 412a, the cooperation between the first positioning column 4211 and the first positioning hole 412a can limit the translational and rotational movement of the stator positioning plate 412 relative to the inner stator 42, prevent the displacement of the stator positioning plate 412, and thus ensure the normal operation of the fan motor 4 and enhance the stability of the entire fan motor 4 structure.

[0171] It should be noted that the fixed connection between the stator positioning plate 412 and the inner stator 42 is achieved by the fastener 10, the first connecting hole 421a, and the second connecting hole 412b. Compared with welding, bonding, or buckle connection, the fastener 10 connection enables the stator positioning plate 412 and the inner stator 42 to be detachably connected. If maintenance of the fan motor 4 is required, the fastener 10 connection can reduce the difficulty of maintenance. The fastener 10 connection has a wide range of applications and can be used for connection of various materials. The cost of the fastener 10 connection is relatively low.

[0172] It should also be noted that the above-mentioned fastener 10 can be a mechanical part such as a bolt, nut, screw, or stud that can achieve detachable connection, and the present embodiment does not make specific limitations thereto.

[0173] Optionally, referring to Figure 12 The plurality of first legs 411 are uniformly distributed along the circumferential direction of the inner stator 42; and referring to Figure 13 The plurality of limiting grooves 4121 are uniformly distributed along the circumferential direction of the inner stator 42, and the plurality of first legs 411 and the plurality of limiting grooves 4121 correspond one-to-one.

[0174] If the plurality of first legs 411 and the plurality of limiting grooves 4121 are not uniformly distributed, some of the first legs 411 in certain areas may bear a larger force while the first legs 411 in other areas bear a smaller force when the fan motor 4 is running, which can easily cause the first legs 411 bearing a larger force to fatigue, deform, or even break prematurely, thereby affecting the stability and service life of the entire fan motor 4.

[0175] The plurality of first legs 411 and the plurality of limiting grooves 4121 are uniformly distributed along the circumference of the inner stator 42, which can make the pressure generated by the rotation of the fan motor 4 evenly dispersed to each first leg 411, so that each first leg 411 bears the same force component, thereby avoiding local overloading of the first leg 411, which can cause structural deformation or damage of the first leg 411, thereby prolonging the service life of the fan motor 4. In terms of assembly, the uniform distribution of the plurality of first legs 411 and the plurality of limiting grooves 4121 facilitates positioning and installation by the operator, because the plurality of first legs 411 and the plurality of limiting grooves 4121 have symmetry, the operator can more easily find the corresponding installation position, reducing the probability of assembly errors.

[0176] Specifically, the portion between the first end 4111 of the first leg and the second end 4112 of the first leg can be a straight support rib, a broken line support rib, or a wave-shaped support rib, please refer to Figure 16 The portion between the first end 4111 of the first leg and the second end 4112 of the first leg can also be an arc-shaped support rib 4113.

[0177] It can be understood that the shape of the arc-shaped support rib 4113 enables the first leg 411 to better withstand the weight of the inner stator 42 and the vibration generated during the operation of the fan motor 4, and the arc-shaped support rib 4113 can increase the deformation resistance of the first leg 411 compared to the straight support rib. In addition, the arc-shaped support rib 4113 can absorb a portion of the vibration energy through its elastic deformation, and the arc-shaped support rib 4113 can play a certain damping role, thereby reducing the generation of noise.

[0178] Please refer to Figure 16 The arc-shaped support rib 4113 includes two opposite arc-shaped edges 4114, and the two arc-shaped edges 4114 are provided with a flange structure. Specifically, the flange structure refers to an additional edge portion formed by bending or folding at the two arc-shaped edges 4114 of the arc-shaped support rib 4113. It can be understood that the flange structure can change the transmission path of the force acting on the first leg 411, making the stress distribution more uniform and reducing local stress concentration, thereby increasing the edge strength of the arc-shaped support rib 4113 and making it more stable when subjected to pressure or tension. The flange structure can also protect the edge of the arc-shaped support rib 4113 from damage due to friction or collision during use.

[0179] It should be noted that, please refer to Figure 5 The width L of the air inlet gap is greater than or equal to 30 mm in the axial direction of the rotating shaft.

[0180] If the width L of the air inlet gap is less than 30mm along the axial direction of the rotating shaft 46, when the width L of the air inlet gap is less than 30mm, the airflow will be greatly restricted when entering the volute 31, the flow rate of the airflow will increase near the air inlet 31a of the volute, forming a larger pressure loss, resulting in a decrease in the amount of air entering the impeller 32, thereby reducing the ventilation capacity and overall performance of the fan motor 4. And the smaller air inlet gap will cause strong turbulence and pressure fluctuation of the airflow, which will cause the fan motor 4 to produce more noise, affecting the comfort of the use environment.

[0181] If the width L of the air inlet gap is greater than 30mm along the axial direction of the rotating shaft 46, the larger air inlet gap can reduce the influence of the fan motor 4 on the air inlet when the air inlet, when the airflow enters the volute 31, the larger air inlet gap can avoid the airflow being blocked by the fan motor 4 when entering the volute 31, thereby improving the efficiency of the air inlet, so that more air can be sucked into the impeller 32 and accelerated to be discharged. And sufficient air inlet gap helps to reduce the noise caused by airflow impact and friction, and the air inlet gap with a width greater than 30mm can make the airflow transition more smoothly, reducing noise.

[0182] When the width L of the air inlet gap is equal to 30mm, the influence of the fan motor 4 on the air inlet can be reduced, and the distance between the inner stator 42 and the volute 31 can be further reduced, thereby reducing the length of the indoor unit 101 in the axial direction of the rotating shaft 46, thereby making the interior of the indoor unit 101 more compact.

[0183] Please refer to Figure 10 Optionally, the fan motor 4 further comprises a adapter 45 connected between the rotating shaft 46 and the end cover 44.

[0184] The adapter 45 serves to connect the outer rotor 43 and the rotating shaft 46, the adapter 45 is connected to the end cover 44, and the rotating shaft 46 is connected to the adapter 45, so that the outer rotor 43 can drive the rotating shaft 46 to rotate, and the adapter 45 can eliminate the need for a coupling to connect the rotating shaft 46 and the outer rotor 43.

[0185] Secondly, the adapter 45 replaces the coupling to connect the rotating shaft 46, which can simplify the assembly process. Since the adapter 45 is designed for the connection between the rotating shaft 46 and the end cover 44, it does not need to be as complex as the coupling. The operator can more conveniently and quickly install the adapter 45 to the end cover 44, reducing assembly time and cost, and improving production efficiency.

[0186] Optionally, the adapter 45 can have a central hole 45a, the first end 461 of the rotating shaft passes through the central hole 45a, and the first end 462 of the rotating shaft and the central hole 45a can transmit torque.

[0187] Firstly, the adapter 45 is matched with the first end 461 of the rotating shaft through the center hole 45a, so that the rotating torque of the outer rotor 43 can be effectively transmitted to the rotating shaft 46, thereby driving the impeller 32 to rotate. When assembling the rotating shaft 46 and the outer rotor 43, the presence of the adapter 45 makes the assembly of the outer rotor 43 and the rotating shaft 46 more convenient. The operator can first connect the adapter 45 with the end cover 44, and then insert the rotating shaft 46 into the center hole 45a of the adapter 45. This step-by-step assembly method is simpler and more convenient than directly assembling the end cover 44 and the rotating shaft 46. In terms of maintenance, if the fan motor 4 needs to be maintained, since the adapter 45 and the rotating shaft 46 are matched through the center hole 45a, they are relatively easy to disassemble and replace, without the need to disassemble the entire centrifugal fan 3 structure, thereby reducing the maintenance cost and difficulty.

[0188] For example, the adapter 45 and the first end 461 of the rotating shaft can be connected through a pin or a key, or through a clamping connection, etc. Specifically, the first end 461 of the rotating shaft is provided with a flat portion 463, and the center hole 45a is a flat hole.

[0189] In this way, the matching design of the flat portion 463 and the flat hole makes the connection between the rotating shaft 46 and the adapter 45 more compact and stable, reduces the 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 rotating shaft 46 and the adapter 45 can still remain compact, and is not prone to looseness or falling off. At the same time, the design of the flat portion 463 makes the cross-sectional shape of the rotating shaft 46 more reasonable, thereby enhancing the carrying capacity of the rotating shaft 46. In the case of high-speed rotation and bearing large torque, the rotating shaft 46 can still maintain stable performance and is not prone to deformation or rupture, which improves the service life and reliability of the rotating shaft 46, reduces the downtime and maintenance cost caused by failure. The structure of the flat portion 463 and the flat hole provides a clear assembly direction, and the operator can insert the first end 461 of the rotating shaft into the center hole 45a of the adapter 45 according to the shape of the flat portion 463 and the flat hole, thereby reducing the difficulty and time of assembly.

[0190] In some embodiments, referring to Figure 9 , the adapter 45 is provided with a third connecting portion and a third positioning portion, the end cover 44 is provided with a fourth connecting portion and a fourth positioning portion, the third connecting portion and the fourth connecting portion are connected through a fastener, and the adapter 45 and the end cover 44 are pre-positioned through the third positioning portion and the fourth positioning portion.

[0191] Wherein, when assembling the end cover 44 and the adapter 45, the operator can pre-position the adapter 45 and the end cover 44 through the third positioning part and the fourth positioning part, and then assemble the end cover 44 and the adapter 45 using the fastener 10, without the need for complex centering operations, thereby improving assembly efficiency; the adapter 45 and the end cover 44 can be separated by disassembling the fastener 10, so that the disassembly process is also faster, thereby facilitating subsequent maintenance and replacement of the fan motor 4.

[0192] Specifically, referring to Figure 14 , the third positioning part includes a second positioning hole 45b, and the fourth positioning part includes a second positioning column 441 which is arranged in the second positioning hole 45b along the axial direction of the centrifugal fan 3.

[0193] Firstly, by controlling the dimensional tolerance between the second positioning column 441 and the second positioning hole 45b, the accurate positional relationship between the end cover 44 and the adapter 45 in the axial direction can be ensured when assembling the end cover 44, the adapter 45 and the shaft 46. Moreover, the cooperation between the second positioning column 441 and the second positioning hole 45b can prevent the relative displacement of the adapter 45 and the end cover 44 in the axial direction when the centrifugal fan 3 is running and generating impact force and centrifugal force, thereby maintaining the stability of the connection between the adapter 45 and the end cover 44 and avoiding the influence of the relative displacement between the end cover 44 and the adapter 45 on the normal operation of the entire fan motor 4.

[0194] In another embodiment, the end cover 44 can be provided with the second positioning hole 45b, and the adapter 45 can be provided with the second positioning column 441. The position of the second positioning hole 45b and the second positioning column 441 is not specifically limited in this embodiment.

[0195] For example, the adapter 45 can be provided with a clamping member, and the end cover 44 can be provided with a clamping groove. The clamping member and the clamping groove are matched and clamped along the axial direction of the centrifugal fan 3.

[0196] It can be understood that the clamping structure can realize quick connection during the assembly process of the centrifugal fan 3. The clamping member on the adapter 45 is directly inserted into the clamping groove of the end cover 44, without the need for complex tools or cumbersome operation steps, thereby shortening the assembly time. In the use process of the centrifugal fan 3, if a component needs to be repaired or replaced due to failure, the advantage of the clamping structure is more obvious. For example, if the end cover 44 has a problem, the end cover 44 and the adapter 45 can be easily disassembled by pulling out the clamping member from the clamping groove, thereby facilitating the repair or replacement operation.

[0197] Optionally, referring to Figure 7 , the centrifugal fan 3 can be multiple, and the multiple centrifugal fans 3 are coaxially arranged along the length direction of the casing 1. The shaft 46 is in driving connection with the multiple impellers 32 of the multiple centrifugal fans 3, respectively.

[0198] In this way, the plurality of centrifugal fans 3 are coaxially arranged along the length direction of the casing 1, so that the air volume and air pressure of the entire indoor unit 101 can be improved, and the air supply volume and air supply efficiency can be improved. In addition, the plurality of centrifugal fans 3 are coaxially arranged, so that the airflow generated by the plurality of centrifugal fans 3 is more evenly distributed in the casing 1. Furthermore, since the plurality of centrifugal fans 3 share a rotating shaft 46, the overall structure of the indoor unit 101 is simplified.

[0199] For example, referring to Figure 3 , the fan motor 4 is arranged on the first axial end surface of the first centrifugal fan 311, the first centrifugal fan 311 being the centrifugal fan 3 closest to the first end 461 of the rotating shaft among the plurality of centrifugal fans 3, and the first axial end surface being the end surface of the first centrifugal fan 311 facing away from the remaining centrifugal fans 3.

[0200] If the fan motor 4 is arranged between the plurality of centrifugal fans 3, the fan motor 4 will interfere with the guidance of the airflow when in operation. In addition, when the fan motor 4 needs to be maintained or repaired, if the fan motor 4 is arranged between the plurality of centrifugal fans 3, the inconvenient-to-maintain part of the structure, such as the centrifugal fan 3, needs to be disassembled, which is high in maintenance cost and complex in repair.

[0201] Arranging the fan motor 4 on the axial end surface of the first centrifugal fan 311 provides a more open operating space and lower maintenance difficulty when the fan motor 4 is maintained, repaired, or replaced. Compared with arranging the fan motor 4 between the plurality of centrifugal fans 3, the fan motor 4 can be accessed without disassembling the plurality of centrifugal fans 3, thereby reducing the maintenance workload and repair time. In addition, when the fan motor 4 is arranged on the first axial end surface of the first centrifugal fan 311, compared with being arranged between the plurality of centrifugal fans 3, the structure of the centrifugal fan 3 and the fan motor 4 is more compact in the axial direction, the axial length is reduced, and the overall volume of the indoor unit 101 is smaller. Furthermore, when the fan motor 4 is arranged on the axial end surface of the first centrifugal fan 311, compared with being arranged between the centrifugal fans 3, the airflow path for heat dissipation of the fan motor 4 is shorter and more direct, the heat generated by the fan motor 4 can be more directly carried away by the airflow generated by the first centrifugal fan 311, and the heat dissipation effect of the fan motor 4 can be improved.

[0202] Specifically, referring to Figure 18 , the indoor unit 101 further comprises a bearing bracket 5 and a rotating bearing 6. The bearing bracket 5 is connected to the second axial end surface of the second centrifugal fan 312, the second centrifugal fan 312 being the centrifugal fan 3 closest to the second end 462 of the rotating shaft among the plurality of centrifugal fans 3, and the second axial end surface being the end surface of the second centrifugal fan 312 facing away from the remaining centrifugal fans 3. The rotating bearing 6 is arranged on the bearing bracket 5, and the second end 462 of the rotating shaft extends into the rotating bearing 6.

[0203] It can be understood that, first, due to the adoption of multiple centrifugal fans 3, the length of the rotating shaft 46 will increase, and when the fan motor 4 drives the centrifugal rotating shaft 46 to rotate, the second end 462 of the rotating shaft is far away from the fan motor 4, which will cause the second end 462 of the rotating shaft 46 to produce greater jitter, and the rotating connection of the rotating shaft 46 and the bearing support 5 provides support for the second end 462 of the rotating shaft, avoiding the jitter of the second centrifugal fan 312 connected to the second end 462, and ensuring the stable operation of the second centrifugal fan 312. The rotating bearing 6 in the bearing support 5 also provides precise support for the rotation of the rotating shaft 46, which helps to further ensure the stability and reliability of the centrifugal fan 3 during operation.

[0204] And compared with arranging the bearing support 5 between the multiple centrifugal fans 3, when the bearing support 5 is arranged on the axial end face of the second centrifugal fan 312, it does not occupy the space between the multiple centrifugal fans 3, avoiding interference with the interaction of the air flow between the multiple centrifugal fans 3. When the multiple centrifugal fans 3 work cooperatively, the air flow in the casing 1 is more evenly and stably distributed. If the bearing support 5 is arranged between the multiple centrifugal fans 3, it may change the flow direction and speed distribution of the local air flow, affecting the working efficiency of the centrifugal fan 3.

[0205] Secondly, arranging the bearing support 5 on the end face makes the stress distribution of the structure of the indoor unit 101 in the axial direction more reasonable. Compared with being arranged between the centrifugal fans 3, the bearing support 5 on the end face can better bear the axial force of the rotating shaft 46, improve the rigidity of the entire structure of the indoor unit 101, and reduce structural deformation or damage and noise caused by vibration and other factors.

[0206] Finally, the bearing support 5 is located on the axial end face of the second centrifugal fan 312, and when the rotating bearing 6 is maintained or replaced, the operation space is relatively large and easy to access. If the bearing support 5 is between the multiple centrifugal fans 3, due to the narrow space and many surrounding components, the difficulty of disassembling and installing the rotating bearing 6 will increase, and when the rotating bearing 6 is maintained, the bearing support 5 is located on the end face, which has less impact on other centrifugal fans 3 and related components. If the bearing support 5 is between the centrifugal fans 3, it may be necessary to disassemble or move other components when maintaining the rotating bearing 6, which increases the risk of damaging other components. Reducing the interference with other components can ensure that the overall performance of the indoor unit 101 is not affected.

[0207] Specifically, please refer to Figure 7 , the bearing support 5 includes a bearing seat 51 and multiple second legs 52, and the bearing seat 51 is arranged outside the volute 31, please refer to Figure 6The rotating bearing 6 is arranged on the bearing seat 51, the first ends of the plurality of second supporting legs 52 are connected to the bearing seat 51, and the second ends of the plurality of second supporting legs 52 are connected to the second axial end face of the second centrifugal fan 312.

[0208] The plurality of second supporting legs 52 connect the bearing seat 51 and the second axial end face of the second centrifugal fan 312, and can effectively disperse the force when the plurality of second supporting legs 52 bear the force from the rotating shaft 46 and the rotating bearing 6, thereby avoiding that the local force of the second supporting leg 52 is too large to cause structural damage. In addition, the plurality of second supporting legs 52 can provide a more stable connection structure. During the operation of the fan motor 4, the plurality of second supporting legs 52 connect the bearing seat 51 and the end face of the centrifugal fan 3 from different positions, can resist the force from the fan motor 4, and keep the relative position between the bearing seat 51 and the centrifugal fan 3 stable, thereby ensuring the normal operation of the indoor unit 101.

[0209] On the other hand, there are gaps between the plurality of second supporting legs 52, which provide channels for air flow. When the centrifugal fan 3 rotates, the air flow can enter the second centrifugal fan 312 through the gaps between the plurality of second supporting legs 52, thereby avoiding the influence of the rotating bearing 6 and the bearing support 5 on the incoming air.

[0210] It should be noted that the connection mode of the second supporting leg 52 to the bearing seat 51 and the second centrifugal fan 312 can be detachable connection. There are various detachable connection modes, such as threaded connection, buckle connection or pin connection, which are not limited in the embodiment.

[0211] It should be further noted that the number of the plurality of second supporting legs 52 can be three, four or other numbers that can provide sufficient supporting force, and the number of the second supporting leg 52 is not limited in the application.

[0212] Optionally, referring to Figure 17 The plurality of second supporting legs 52 are uniformly distributed along the circumference of the rotating shaft 46, and there are gaps between adjacent two second supporting legs 52.

[0213] It can be understood that the plurality of second supporting legs 52 are uniformly distributed along the circumference of the rotating shaft 46, so that the pressure from the bearing seat 51 can be uniformly transmitted to each second supporting leg 52. The uniformly distributed second supporting legs 52 ensure that the force borne by each second supporting leg 52 in the circumferential direction is basically the same, thereby avoiding that the pressure borne by some second supporting legs 52 is too large to cause structural deformation or damage of the second supporting leg 52, thereby affecting the normal use of the indoor unit 101 and increasing the maintenance frequency and cost.

[0214] When installing the bearing bracket 5 to the end face of the second centrifugal fan 312, the uniformly distributed second feet 52 make the installation process simpler and more accurate. The operator can more easily determine the installation position of each second foot 52.

[0215] To further reduce the axial movement of the rotating shaft 46, please refer to Figure 16 , the second end 462 of the rotating shaft is provided with a positioning shaft shoulder 4621, which corresponds to the rotating bearing 6 in the axial direction.

[0216] The positioning shaft shoulder 4621 can provide accurate axial positioning, and when the rotating shaft 46 has a tendency to move towards the rotating bearing 6, the positioning shaft shoulder 4621 can prevent the rotating shaft 46 from moving, ensuring the position of the rotating shaft 46 in the axial direction, improving the stability and reliability of the indoor unit 101.

[0217] In addition, the presence of the positioning shaft shoulder 4621 makes the installation of the rotating shaft 46 more convenient and accurate. During installation, the positioning shaft shoulder 4621 can serve as a reference surface to help the operator quickly determine the correct position of the rotating shaft 46, reducing adjustment and calibration work during installation.

[0218] Please refer to Figure 11 , the fan motor 4 also includes a stator bearing 47, which is arranged at the center of the inner stator 42, and the surface of the outer rotor 43 facing the inner stator 42 is provided with an extension 431, which corresponds to the stator bearing 47 in the axial direction.

[0219] It can be understood that the extension 431 extending towards the surface of the inner stator 42 and the stator bearing 47 can provide axial positioning for the outer rotor 43, and the extension 431 can prevent the movement of the outer rotor 43 when the outer rotor 43 has a tendency to move towards the inner stator 42 in the axial direction, thereby maintaining the stability of the internal structure of the fan motor 4.

[0220] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some 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; An indoor heat exchanger arranged in the casing accommodating cavity; A centrifugal fan arranged in the casing accommodating cavity, the centrifugal fan is configured to introduce airflow into the casing from the casing air inlet, and output the airflow to the outside from the casing air outlet after heat exchange through the indoor heat exchanger, the centrifugal fan comprises: A volute arranged in the casing accommodating cavity and connected with the casing, a volute air inlet is arranged on the axial end face of the volute; An impeller rotationally arranged in the volute; A fan motor comprising: A motor support connected to the axial end face of the volute, and the motor support is arranged outside the volute; An inner stator arranged on the motor support, and an air inlet gap is formed between the inner stator and the volute air inlet in the axial direction of the fan motor, so that the airflow in the casing can enter the volute air inlet through the air inlet gap; An outer rotor arranged around the inner stator, the outer rotor can rotate relative to the inner stator; An end cover connected with the outer rotor; A rotating shaft connected with the end cover, the rotating shaft is connected with the outer rotor, and is in driving connection with the impeller of the centrifugal fan, so that the impeller is driven to rotate synchronously when the outer rotor rotates.

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; An indoor heat exchanger arranged in the casing accommodating cavity; A centrifugal fan arranged in the casing accommodating cavity, the centrifugal fan is configured to introduce airflow into the casing from the casing air inlet, and output the airflow to the outside from the casing air outlet after heat exchange through the indoor heat exchanger, the centrifugal fan comprises: A volute arranged in the casing accommodating cavity and connected with the casing, a volute air inlet is arranged on the axial end face of the volute; An impeller rotationally arranged in the volute; A fan motor comprising: A motor support connected to the axial end face of the volute, and the motor support is arranged outside the volute, the motor support is provided with an air inlet hole, the air inlet hole is in communication with the volute air inlet, so that the airflow in the casing can enter the volute air inlet through the air inlet hole; An inner stator arranged on the motor support and outside the volute; An outer rotor arranged around the inner stator, the outer rotor can rotate relative to the inner stator; An end cover connected with the outer rotor; A rotating shaft connected with the end cover, the rotating shaft is connected with the outer rotor, and is in driving connection with the impeller of the centrifugal fan, so that the impeller is driven to rotate synchronously when the outer rotor rotates.

3. The duct type air conditioner according to claim 1 or 2, wherein The motor support comprises: A plurality of first legs, first ends of the plurality of first legs being connected to the inner stator, second ends of the plurality of first legs being connected to the axial end face of the volute, an air inlet being formed between two adjacent first legs.

4. The duct type air conditioner according to claim 3, wherein The motor support further comprises: A stator positioning plate, the stator positioning plate being arranged on a first end face of the inner stator, the first end face of the inner stator being an end face of the inner stator facing away from the centrifugal fan, a plurality of limiting grooves being arranged on the stator positioning plate, the second ends of the plurality of first legs being arranged in the plurality of limiting grooves respectively. 5.The ducted air conditioner according to claim 4, wherein The first end face of the inner stator is provided with a first connecting portion and a first positioning portion; The stator positioning plate is provided with a second connecting portion and a second positioning portion; The first connecting portion and the second connecting portion are connected by a fastener; The inner stator and the stator positioning plate are pre-positioned by the first positioning portion and the second positioning portion. 6.The ducted air conditioner according to claim 5, wherein The first connecting portion comprises a first connecting hole; The first positioning portion comprises a first positioning column; The second connecting portion comprises a second connecting hole; The second positioning portion comprises a second positioning hole; The fastener is a screw, the fastener being connected by passing through the first connecting hole and the second connecting hole; The first positioning column is arranged in the first positioning hole along the axial direction of the centrifugal fan.

7. The ducted air conditioner according to claim 3, wherein The plurality of first legs are uniformly distributed along the circumferential direction of the inner stator; The plurality of limiting grooves are uniformly distributed along the circumferential direction of the inner stator, and the plurality of first legs and the plurality of limiting grooves correspond one-to-one.

8. The ducted air conditioner according to claim 3, wherein The portion between the first end and the second end of the first leg is an arc-shaped support rib.

9. The ducted air conditioner according to claim 8, wherein The arc-shaped support rib comprises two opposite arc-shaped edges, the two arc-shaped edges being provided with a flange structure.

10. The ducted air conditioner according to claim 1, wherein The width of the air inlet gap is greater than or equal to 30 mm along the axial direction of the rotating shaft.

11. The duct type air conditioner according to claim 1 or 2, wherein The indoor unit further comprises: An adapter, the adapter being connected between the rotating shaft and the end cover. 12.The ducted air conditioner according to claim 11, wherein The adapter has a central hole; The first end of the rotating shaft is arranged in the central hole, and the first end of the rotating shaft and the central hole can transmit torque.

13. The ducted air conditioner according to claim 12, wherein The first end of the rotating shaft is provided with a flat position, and the central hole is a flat hole. 14.The ducted air conditioner according to claim 11, wherein The adapter is provided with a third connecting portion and a third positioning portion; The end cover is provided with a fourth connecting portion and a fourth positioning portion; The third connecting portion and the fourth connecting portion are connected by a fastener; The adapter and the end cover are pre-positioned by the third positioning portion and the fourth positioning portion. 15.The ducted air conditioner according to claim 14, wherein The third positioning portion comprises a second positioning hole; The fourth positioning portion comprises a second positioning column; The second positioning column is arranged in the second positioning hole along the axial direction of the centrifugal fan.

16. The ducted air conditioner according to claim 11, wherein The centrifugal fans are multiple, and the multiple centrifugal fans are coaxially arranged along the length direction of the casing.

17. The ducted air conditioner according to claim 16, wherein The fan motor is arranged on a first axial end surface of a first centrifugal fan, the first centrifugal fan is the centrifugal fan closest to the first end of the rotating shaft among the multiple centrifugal fans, and the first axial end surface is an end surface of the first centrifugal fan facing away from the remaining centrifugal fans.

18. The ducted air conditioner according to claim 16, wherein The indoor unit further comprises: A bearing support connected to a second axial end surface of a second centrifugal fan, the second centrifugal fan being the centrifugal fan closest to the second end of the rotating shaft among the multiple centrifugal fans, the second axial end surface being an end surface of the second centrifugal fan facing away from the remaining centrifugal fans; A rotating bearing arranged on the bearing support, and the second end of the rotating shaft extending into the rotating bearing.

19. The ducted air conditioner according to claim 18, wherein The bearing support comprises: A bearing seat arranged outside the volute, and the rotating bearing being arranged on the bearing seat; Multiple second legs, first ends of the multiple second legs being connected to the bearing seat, and second ends of the multiple second legs being connected to the second axial end surface of the second centrifugal fan.

20. The ducted air conditioner according to claim 19, wherein The multiple second legs are uniformly distributed along the circumference of the rotating shaft, and gaps are arranged between adjacent two second legs.

21. The ducted air conditioner according to claim 19, wherein The second end of the rotating shaft is provided with a positioning shaft shoulder, and the positioning shaft shoulder corresponds to the rotating bearing in the axial direction.

22. The duct type air conditioner according to claim 1 or 2, wherein The fan motor further comprises: A stator bearing arranged at the center of the inner stator; An extending portion arranged on the surface of the end cover facing the inner stator, and the extending portion corresponding to the inner stator bearing in the axial direction.

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