CN223726471U

CN223726471U - Air duct type air conditioner

Info

Publication number: CN223726471U
Application number: CN202422952916.9U
Authority: CN
Inventors: 赵朋; 秦鸿亮
Original assignee: Hisense Air Conditioning Co Ltd
Current assignee: Hisense Air Conditioning Co Ltd
Priority date: 2024-11-29
Filing date: 2024-11-29
Publication date: 2025-12-26
Anticipated expiration: 2034-11-29

Abstract

This application relates to the field of air conditioning equipment technology, specifically disclosing a ducted air conditioner. The indoor unit includes a casing with an air inlet and an air outlet, and a casing cavity is formed within the casing. The casing includes a first side plate located at one end along its length and having a through hole. An indoor heat exchanger is disposed within the casing cavity. Multiple centrifugal fans are coaxially disposed within the casing cavity along the length of the casing. Each centrifugal fan includes a volute and an impeller. The volute is disposed within the casing cavity and connected to the casing, while the impeller is rotatably disposed within the volute. A fan motor is disposed outside the first side plate. The fan motor includes an inner stator, an outer rotor, and a motor shaft. The outer rotor is arranged around the inner stator and can rotate relative to the inner stator. The motor shaft is connected to the outer rotor and extends through the through hole into the casing cavity. The motor shaft is connected to multiple impellers for transmission, so that the multiple impellers rotate synchronously when the outer rotor rotates.

Description

Air duct type air conditioner

Technical Field

The application relates to the technical field of air conditioning equipment, in particular to an air duct type air conditioner.

Background

An air conditioner is an apparatus for adjusting and controlling parameters such as temperature, humidity, and flow rate of ambient air in a building or structure by manual means.

At present, more and more people choose to install air conditioners indoors to regulate and control the temperature of indoor air. The air duct type air conditioner is one of various types of air conditioners, and the air duct type air conditioner becomes the first choice of more families in selecting the air conditioner due to the characteristics of high aesthetic degree, high cost performance, strong adaptability and the like.

In the prior art, an inner rotor motor is often used for driving a centrifugal fan to rotate, and circulating air quantity is provided for an indoor heat exchanger to complete heat exchange. The noise when the inner rotor motor operates is large, and the heat dissipation of the inner rotor motor is poor because the rotor is located inside the motor. And the inner rotor motor drives the plurality of fans, the motor is typically located at an intermediate position between the plurality of fans. When the motor needs to be maintained and replaced, the operation is inconvenient.

Disclosure of utility model

The embodiment of the application discloses an air duct type air conditioner, which has the advantages of low noise and good heat dissipation performance when a fan motor runs, and convenient maintenance and operation when the fan motor needs to be maintained or replaced.

To achieve the above object, some embodiments of the present application provide an air duct type air conditioner, including:

An indoor unit, the indoor unit comprising:

The casing, the casing is provided with casing air intake and casing air outlet, just be formed with the casing in the casing and hold the chamber, the casing includes:

the first side plate is positioned at one end of the shell along the length direction and is provided with a through hole;

The partition plate is arranged in the shell accommodating cavity, the partition plate divides the shell accommodating cavity into an air inlet cavity and an air outlet cavity, the air inlet cavity is communicated with the shell air inlet, and the air outlet cavity is communicated with the shell air outlet;

the indoor heat exchanger is arranged in the air outlet cavity;

The centrifugal fans are coaxially arranged in the air inlet cavity along the length direction of the shell, air inlets of the centrifugal fans are communicated with the air inlet cavity, air outlets of the centrifugal fans are communicated with the air outlet cavity, and the centrifugal fans comprise:

the volute is arranged in the housing accommodating cavity and is connected with the housing;

The impeller is rotationally arranged in the volute;

fan motor, fan motor set up in outside the first curb plate, fan motor includes:

An inner stator;

The outer rotor is arranged outside the inner stator in a surrounding manner and can rotate relative to the inner stator;

the end cover is connected with the outer rotor;

the rotating shaft is connected to the end cover, penetrates through the through hole and stretches into the air inlet cavity, and is respectively in transmission connection with a plurality of impellers of the centrifugal fans so as to drive the impellers to synchronously rotate when the outer rotor rotates;

The bearing support is positioned at one side of the centrifugal fans, far away from the fan motor, along the length direction of the shell and is detachably connected with the partition plate;

The rotary bearing is arranged on the bearing support, and one end, far away from the fan motor, of the rotary shaft penetrates through the rotary bearing.

Therefore, the outer rotor of the fan motor is arranged outside the inner stator in a surrounding mode, so that heat dissipation of the outer rotor is more effective, and heat dissipation of the fan motor is better. And because the clearance between the outer rotor and the inner stator is arranged, mechanical friction can not be generated, so that the fan motor is quieter in the running process.

And the fan motor is arranged outside the first side plate of the shell, so that when the fan motor needs to be maintained, the fan motor can be maintained directly from the side surface of the first side plate of the shell without detaching the fan motor, the operation space outside the first side plate is large, and the operation is convenient.

If the bearing support is connected to the upper top plate or the lower bottom plate of the casing, an operator needs to stretch a hand into the casing when installing or detaching the bearing support, and bends the wrist upwards or downwards to operate, and the installation or detachment condition of the bearing support cannot be intuitively seen. Therefore, the bearing support can be detachably connected to the partition board, so that an operator can directly perform connection operation between the bearing support and the partition board in the direction towards the partition board, the visibility of the connection part of the bearing support and the partition board is higher, the situation that a hand stretches into the casing is avoided, the bearing support is operated under the condition that observation is inconvenient, the convenience and the rapidness are guaranteed when the bearing support is assembled, and the improvement of the assembly efficiency of the indoor unit is facilitated.

Meanwhile, if the bearing bracket is connected to the upper top plate or the lower bottom plate of the casing, vibration generated by the centrifugal fan can be directly transmitted to the casing in the running process of the centrifugal fan, so that resonance can be generated on other parts in the indoor unit, and additional noise is generated. Therefore, the bearing support is connected to the partition board, vibration in the running process of the centrifugal fan can be indirectly transmitted to the partition board through the bearing support, and then is indirectly transmitted to the casing through the partition board, so that vibration in the running process of the centrifugal fan is prevented from being directly transmitted to the casing, resonance effects of other components in the indoor unit can be effectively reduced, stability of the indoor unit is guaranteed, and overall noise level of the indoor unit is reduced.

Because a plurality of centrifugal fans are adopted, the length of the rotating shaft is increased, when the fan motor drives the rotating shaft to rotate, one end of the rotating shaft, which is far away from the fan motor, is far away from the driving source, so that the end, which is far away from the fan motor, of the rotating shaft generates larger shake, the rotating shaft is connected with the bearing support in a rotating way, the support is provided for one end, which is far away from the fan motor, of the rotating shaft, the shaking of the centrifugal fan, which is connected with one end, which is far away from the fan motor, of the rotating shaft is avoided, and the stable operation of the centrifugal fan is ensured. The swivel bearing in the bearing support also provides accurate support for rotation of the shaft, helping to further ensure stability and reliability of the centrifugal fan during operation.

The application also provides an air duct type air conditioner, which comprises:

An indoor unit, the indoor unit comprising:

the indoor heat exchanger is arranged in the air outlet cavity;

The impeller is rotationally arranged in the volute;

a fan motor, the fan motor comprising:

The motor shell is positioned outside the shell and detachably connected with the shell, and a motor accommodating cavity is formed in the motor shell;

The inner stator is arranged in the motor accommodating cavity and is connected with the motor shell;

The outer rotor is positioned in the motor accommodating cavity, the outer rotor is arranged outside the inner stator in a surrounding manner, and the outer rotor can rotate relative to the inner stator;

the end cover is connected with the outer rotor;

The rotating shaft is connected to the end cover, penetrates through the shell and stretches into the air inlet cavity, and is respectively in transmission connection with a plurality of impellers of the centrifugal fans so as to drive the impellers to synchronously rotate when the outer rotor rotates;

Thus, because the motor shell of the fan motor can be detachably connected outside the shell, the inner stator is connected with the motor shell together, the outer rotor is arranged in the motor accommodating cavity of the motor shell, and when the fan motor needs to be maintained, the fan motor can be maintained directly from the side surface outside the shell without being detached, the operation space outside the shell is large, and the operation is convenient.

In some embodiments of the present application, the motor housing has a mounting opening toward the casing, and the inner stator and the outer rotor are mounted in the motor accommodating chamber through the mounting opening.

Therefore, the inner stator and the outer rotor can conveniently enter the motor accommodating cavity through the mounting opening arranged towards the shell through the motor shell, and accordingly the mounting flow of the motor is simplified. When the internal components of the motor need to be disassembled or replaced, maintenance personnel can easily take out the inner stator and the outer rotor through the mounting port to carry out necessary maintenance or replacement.

In some embodiments of the application, the motor housing further comprises a first flange disposed along a circumference of the mounting port.

Thus, the first flange is used as a connecting part between the motor shell and the shell, so that stable connection between the motor shell and the shell can be realized, and the overall structural strength of the fan motor can be enhanced. The first flange is arranged around the mounting opening like a reinforcing ring, so that external impact and vibration can be effectively resisted, and the stability and durability of the fan motor are improved.

In some embodiments of the application, the fan motor further comprises:

The second flange is arranged at one end of the inner stator, which is far away from the first side plate, and is fixedly connected with the inner stator, and the second flange is connected with the motor shell.

Therefore, the second flange is used as a connecting part between the inner stator and the motor shell, the integral structural strength of the fan motor can be remarkably enhanced, and the inner stator is firmly connected to the motor shell, so that the stability and the durability of the fan motor are improved.

In some embodiments of the application, the second flange is provided with a threaded hole;

The motor shell is provided with a connecting hole;

the fan motor further comprises a fastening piece, and the fastening piece penetrates through the threaded hole to be connected with the connecting hole.

In this way, a stable and reliable connection can be formed by the fastener passing through the threaded hole and being connected with the connecting hole on the motor housing. The connecting mode can bear larger tensile force and shearing force, ensure firm connection between the inner stator and the motor shell and prevent looseness caused by vibration or impact. The arrangement of the threaded holes and the connecting holes makes the installation process simpler and more visual. When the second flange needs to be disassembled or replaced, the second flange and the motor shell can be separated only by disassembling the fastener, so that the maintenance cost and the time cost are reduced.

In some embodiments of the application, the motor housing comprises:

A bottom plate;

the side plate is arranged around one circle of the bottom plate, and the second flange is connected with the bottom plate.

Thus, the bottom plate is used as the bottom support of the motor shell, and a stable foundation is provided for the whole fan motor. The motor can bear the weight of the fan motor and vibration and impact during operation, and ensures the stable operation of the fan motor. The side plates are arranged around the bottom plate in a circle and form a main body structure of the motor shell together with the bottom plate. The motor not only enhances the overall rigidity of the motor shell, but also improves the deformation resistance of the motor shell, and ensures that the fan motor can keep stable shape and size under various working conditions. The second flange is connected with the bottom plate, and the second flange is used as a connecting part between the inner stator and the motor shell, and also plays a role in transmitting and dispersing stress, so that the overall strength and durability of the fan motor are improved.

In some embodiments of the application, the bearing support comprises:

The bracket bottom plate is connected with the partition plate through a fastener;

the support curb plate, the support curb plate connect in the support bottom plate, the support curb plate is equipped with the bearing mounting hole, swivel bearing is located in the bearing mounting hole.

So, be connected support bottom plate and baffle through the fastener for bearing support and baffle's connection is more firm, just can separate support bottom plate and baffle with the fastener dismantlement, makes the dismantlement process become more swift, has made things convenient for follow-up maintenance and the change of bearing support. And moreover, the support side plate is provided with a bearing mounting hole, and the rotating bearing is positioned in the bearing mounting hole, so that the stability and the reliability of the rotating shaft in the rotating process are ensured, and the faults caused by looseness or abrasion of the bearing are reduced. The support side plates and the support bottom plate form a stable frame structure, and the design is beneficial to improving the overall rigidity of the bearing support and enhancing the capability of bearing external force.

In some embodiments of the application, the bracket bottom plate is disposed on a side of the bracket side plate remote from the centrifugal fan.

Therefore, the bracket bottom plate is prevented from being blocked by the rotating shaft of the centrifugal fan in the mounting or dismounting process, and the bearing bracket is ensured to be mounted and dismounted normally.

In some embodiments of the application, the bearing support further comprises a positioning structure, the positioning structure is arranged on the support base plate, and the support base plate and the partition plate are pre-positioned through the positioning structure.

Therefore, when the bearing support is installed, the positioning structure and the partition plate can be used for carrying out pre-positioning, so that the accuracy of the installation position of the bearing support is ensured, the installation position of the bearing support can be determined only through the positioning structure, the fastener is used for connecting after the pre-positioning, and the efficiency of the installation of the bearing support is improved.

In some embodiments of the present application, the outer ring of the rotary bearing has a flange along a radial direction of the rotation shaft, and the flange abuts against a surface of a side of the bracket side plate away from the centrifugal fan;

The bearing support further comprises:

and the bearing cover is connected to one side of the bracket side plate far away from the centrifugal fan, and the flange is extruded and fixed on the bracket side plate.

So, connect in the bearing cap of one side that centrifugal fan was kept away from to the support curb plate can be fixed swivel bearing's flange extrusion on the support curb plate, and then carry out spacingly in the axial to swivel bearing, can prevent that swivel bearing from deviating from in the bearing mounting hole, guaranteed pivot pivoted stability and reliability. In addition, the bearing cover can effectively prevent dust, moisture and other impurities from entering the bearing, so that the sealing performance of the bearing is enhanced.

In some embodiments of the present application, the indoor unit further includes:

The damping piece is arranged between the motor shell and the shell.

Therefore, vibration generated in the running process of the fan motor can be effectively absorbed and relieved by arranging the damping piece between the motor shell and the shell, so that the running stability of the indoor unit is improved, and noise and component abrasion caused by vibration are reduced.

In some embodiments of the application, the shock absorbing member is a rubber pad.

Therefore, the rubber pad can effectively absorb and disperse vibration energy generated by motor operation due to high elasticity and good damping performance. The rubber pad not only has damping performance, but also has certain sound insulation effect. The motor vibration isolation device can effectively isolate and weaken noise generated by motor vibration, and reduce the transmission of the noise to the machine shell and the external environment.

In some embodiments of the application, the impeller comprises:

A hub having a central bore;

a blade connected to an outer periphery of the hub;

The rotating shaft comprises:

The fan rotating shafts are respectively connected with the central holes of the hubs and can transmit torque to the hubs;

and the motor rotating shaft is connected with the outer rotor, and is coaxially arranged with the fan rotating shaft and is connected with the fan rotating shaft through a coupler.

Therefore, the motor rotating shaft is connected with the fan rotating shaft through the coupler, and the connection mode is convenient to detach and replace. When the fan motor needs to be maintained or replaced, the motor rotating shaft and the fan rotating shaft can be easily separated only by detaching the coupler, so that subsequent operation is convenient. And the fan rotating shafts are respectively connected with the central holes of the hubs, so that an integral fan system can be formed, a plurality of impellers can synchronously rotate, and the energy transmission efficiency and the energy conversion efficiency are improved.

In some embodiments of the application, the coupling comprises:

the shaft coupling comprises a shaft coupling body, wherein a shaft connecting hole is formed in the shaft coupling body, a first end of a fan rotating shaft and a first end of a motor rotating shaft are respectively arranged at two ends of the shaft connecting hole in a penetrating mode, a first threaded hole and a second threaded hole are further formed in the shaft coupling body, and the first threaded hole and the second threaded hole are respectively communicated with the shaft connecting hole;

a first screw threadedly engaged with the first threaded hole to fasten a first end of the fan rotation shaft;

and the second threaded piece is in threaded fit with the second threaded hole so as to fasten the first end of the motor rotating shaft.

So, the design of the shaft connecting hole in the coupler body ensures that the first end of the fan rotating shaft and the first end of the motor rotating shaft can be respectively penetrated at the two ends of the shaft connecting hole, thereby realizing the accurate alignment of the shaft center, reducing the vibration and noise generated by the misalignment of the shaft center and improving the stability and the reliability of the rotation of the rotating shaft. And the first screw thread piece is in threaded fit with the first threaded hole, and the second screw thread piece is in threaded fit with the second threaded hole, so that the fan rotating shaft and the motor rotating shaft are respectively fastened on the coupler body. The fastening mode is simple and convenient, and can provide reliable connection strength, so that the rotating shaft is ensured not to loosen or fall off when rotating at a high speed.

In some embodiments of the present application, a flat is provided on a portion of the fan rotating shaft for connecting with a central hole of the hub, and the shape of the central hole of the hub is adapted to the flat.

In this way, in the connection of the fan rotating shaft and the hub, the flat position can ensure that the fan rotating shaft is accurately aligned with the central hole of the hub, so that the fan rotating shaft can more directly transmit the torque transmitted by the fan motor to the hub, the loss of the torque between the fan rotating shaft and the hub in the transmission process is reduced, the impeller is further ensured to sufficiently rotate under the driving of the fan rotating shaft, and the problem of unstable connection or unsmooth transmission caused by dislocation is avoided. And the adaptation design of flat position and wheel hub centre bore for the connection between fan pivot and the wheel hub is inseparabler and firm, and this vibration and noise that produces because of connecting looseness or not centering have been reduced, have improved the stability and the reliability of system. Under the condition of high-speed rotation, the connection between the fan rotating shaft and the hub can still be kept tight through the flat position, and the loosening or falling-off condition is not easy to occur.

In some embodiments of the application, the impeller comprises:

A hub having a central bore;

a blade connected to an outer periphery of the hub;

The rotating shaft comprises:

The motor rotating shaft is connected to the outer rotor, the motor rotating shafts are respectively connected to the central holes of the hubs, and the motor rotating shaft can transmit torque to the hubs.

In this way, the motor shaft is directly connected to the hub center holes of the plurality of impellers, so that torque can be directly and efficiently transmitted to each impeller. The design reduces the loss of energy in the transmission process and improves the overall energy transmission efficiency of the system. And, the design of the hub central hole with the motor shaft directly connected with a plurality of impellers reduces the use of an intermediate transmission part, which not only reduces the complexity and cost of the system, but also reduces the downtime caused by the failure of the transmission part.

In some embodiments of the present application, an end of the rotating shaft near the bearing support has a first blocking portion, and the first blocking portion corresponds to the rotating bearing along an axial direction of the rotating shaft.

Therefore, through the arrangement of the first blocking part, the axial position of the rotating shaft is effectively limited and fixed at the end face of the rotating bearing in the rotating process, and the rotating shaft can be prevented from axially moving towards one side of the bearing support due to uneven stress or vibration and the like, so that the stability of the rotating shaft is enhanced. The stable rotating shaft can ensure the normal operation of the centrifugal fan, reduce noise and vibration generated by shaking of the rotating shaft and improve the overall performance of the centrifugal fan.

In some embodiments of the application, the shaft is fixedly connected to the center of the end cap, and the outer rotor is connected within the end cap.

Therefore, the rotating shaft is fixedly connected to the center of the end cover, and the outer rotor is connected to the end cover, so that the rotating shaft is driven by the outer rotor to rotate more stably, vibration and noise generated by axial shaking of the rotating shaft are reduced, and the running stability of the rotating shaft is improved.

In some embodiments of the application, the fan motor further comprises:

a stator bearing disposed at a center of the inner stator;

The rotating shaft comprises:

the rotating shaft body is connected with the end cover:

The first end of the stator central shaft penetrates through the stator bearing, and the second end of the stator central shaft is connected with the rotating shaft body.

Therefore, the stator bearing is arranged at the center of the inner stator, the stator central shaft is connected with the rotating shaft body, connection between the inner stator and the outer rotor is achieved, the centers of the inner stator and the outer rotor are ensured to be on the same axis, vibration between the inner stator and the outer rotor is reduced, the service life of the fan motor is prolonged, and the stator central shaft and the stator bearing also provide additional support for the inner stator.

In some embodiments of the present application, the rotating shaft body has a central hole, and the second end of the stator central shaft is inserted into the central hole of the rotating shaft body.

So, in the centre bore of locating the pivot body was worn to the stator center pin, provided extra support for the pivot body, strengthened its stability when high-speed rotation, guaranteed simultaneously that stator center pin and the center of pivot body are on same axis yet, this helps reducing vibration and noise in the fan motor operation process, improves fan motor's wholeness ability.

In some embodiments of the application, the shaft body is integrally formed with the stator central shaft.

Therefore, the rotating shaft body and the stator central shaft are integrally formed, so that the coaxiality of the rotating shaft body and the stator central shaft is guaranteed, the problem that the stator central shaft shakes due to the fact that the connection between the rotating shaft body and the stator central shaft is not firm is prevented, and the stability of the fan motor during operation is guaranteed.

In some embodiments of the present application, a surface of the end cover facing the inner stator is provided with a second blocking portion, and the second blocking portion corresponds to the stator bearing along an axial direction of the rotating shaft.

In this way, the arrangement of the second blocking part makes the end cover more stable in structure. The axial corresponding relation between the rotary shaft and the stator bearing effectively limits the movement of the rotary shaft integrally formed on the end cover to one side of the inner stator in the axial direction, thereby further enhancing the stability and reliability of the rotary shaft. The design is beneficial to reducing noise and vibration generated by shaking of the rotating shaft and improving the operation efficiency of the whole centrifugal fan.

In some embodiments of the present application, a first preset gap is formed between the second blocking portion and an end surface of the stator bearing, a second preset gap is formed between a surface of the end cover facing the inner stator and the inner stator, and the first preset gap is smaller than the second preset gap along an axial direction of the rotating shaft.

Therefore, as the outer rotor is connected to the end cover, the surface of the end cover, facing the inner stator, of the end cover is not contacted with the inner stator due to the second preset gap, but slight play can occur between the outer rotor and the inner stator along the axial direction of the rotating shaft, and the first preset gap is smaller than the second preset gap, so that the outer rotor can not collide with the inner stator when the rotating shaft moves to the rightmost side in the axial direction, and the normal operation of the fan motor is ensured.

In some embodiments of the present application, an end of the rotating shaft near the bearing support is provided with an extending section, the extending section extends into the rotating bearing, and a length of the extending section is greater than a width of the first preset gap.

So, the length of the extension section of the rotating shaft extending into the rotating bearing is greater than the width of the first preset gap, so that when the rotating shaft moves to one side of the inner stator in the axial direction, when one end of the rotating shaft, which is close to the inner stator, is abutted to the stator bearing, one end of the rotating shaft, which is close to the bearing support, is still positioned in the rotating bearing, and the end, which is close to the bearing support, of the rotating shaft is prevented from being separated from the rotating bearing during the movement, and further the stable operation of the centrifugal fan is ensured.

In some embodiments of the present application, the casing further includes a second side plate, the second side plate and the first side plate are disposed opposite to each other along an axial direction of the rotating shaft, and the indoor unit further includes a distribution box disposed on the second side plate, and the fan motor is electrically connected to the distribution box.

Thus, if the distribution box is arranged inside the shell, the distribution box occupies the inner space of the shell, so that the arrangement space of other components arranged inside the shell becomes small, and the normal operation of the other components can be influenced. And, the block terminal setting can occupy partial axial space in the casing for centrifugal fan's space of entering air diminishes, can influence centrifugal fan's intake. Therefore, the distribution box is arranged on the second side plate, the inner space of the shell is not occupied, and the normal operation of other parts is ensured, and the air inlet of the centrifugal fan is ensured not to be influenced. And because the fan motor and the distribution box are respectively positioned at the two sides of the shell, the fan motor and the distribution box can be respectively maintained, so that the maintenance difficulty is reduced, the working efficiency is improved, and the equipment fault risk caused by improper maintenance is reduced. Meanwhile, as a certain distance exists between the distribution box and the fan motor, the risks of electric interference and short circuit can be reduced, the electric safety of the indoor unit can be improved, and the use safety of a user is guaranteed.

Compared with the prior art, the application has the beneficial effects that:

The indoor unit of the air duct type air conditioner comprises a shell, an indoor heat exchanger, a plurality of centrifugal fans and a fan motor, wherein the shell is provided with a shell air inlet and a shell air outlet, a shell accommodating cavity is formed in the shell, the shell comprises a first side plate, the first side plate is positioned 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 outwards from the shell air outlet after exchanging heat through the indoor heat exchanger, the centrifugal fans comprise a volute and impellers, the volute is arranged in the shell accommodating cavity and connected with the shell, the impellers are 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 rotating shaft, the outer rotor is circumferentially arranged outside the inner stator, the motor rotating with respect to the inner stator, the outer rotor is connected with the outer rotor, and stretches into the shell accommodating cavity through the through holes, and the motor rotating shafts are respectively connected with the plurality of impellers of the centrifugal fans in a transmission mode, and the impellers are driven to rotate synchronously when the outer rotor rotates. Like this, set up drive centrifugal fan pivoted fan motor outside the first side board of one end along casing length direction, but not set up fan motor between a plurality of centrifugal fans for the motor has bigger maintenance space when need maintenance change, need not dismantle the casing or centrifugal fan just can dismantle fan motor and examine and repair fan motor, convenient and fast more, simultaneously, fan motor can not dismantle, directly maintains fan motor from the first side board outside of casing, has reduced maintenance motor's cost and time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an air duct type air conditioner according to an embodiment of the present application under a view angle;

Fig. 2 is a schematic structural diagram of an air duct type air conditioner according to an embodiment of the present application under another view angle;

Fig. 3 is an exploded view of an indoor unit according to an embodiment of the present application;

Fig. 4 is a schematic structural view of a first side plate according to an embodiment of the present application;

Fig. 5 is a rear view of an indoor unit according to an embodiment of the present application;

FIG. 6 is a cross-sectional view of A-A of FIG. 5;

Fig. 7 is a schematic structural view of a centrifugal fan according to an embodiment of the present application;

Fig. 8 is a schematic structural diagram of a fan motor according to an embodiment of the present application under a view angle;

FIG. 9 is a schematic view of a motor housing according to an embodiment of the present application in a view angle;

Fig. 10 is a schematic view of a motor housing according to an embodiment of the present application in another view;

fig. 11 is a schematic structural diagram of a fan motor according to an embodiment of the present application at another view angle;

FIG. 12 is a schematic view of a bearing support disclosed in an embodiment of the present application;

FIG. 13 is a schematic view illustrating the connection of the long shaft of the fan according to the embodiment of the present application;

Fig. 14 is a schematic structural view of a coupling according to an embodiment of the present application;

Fig. 15 is a top view of an indoor unit according to an embodiment of the present application;

FIG. 16 is a cross-sectional view of B-B of FIG. 15;

Fig. 17 is a partial enlarged view of a in fig. 16.

Reference numerals illustrate:

100-tuber pipe type air conditioner 101-indoor unit;

1-shell, 1 a-shell air inlet, 1 b-shell air outlet, 10-shell accommodating cavity, 10 a-air inlet cavity, 10 b-air outlet cavity, 11-first side plate, 11 a-through hole, 12-baffle plate and 13-second side plate;

2-an indoor heat exchanger;

3-centrifugal fan, 31-volute, 32-impeller, 321-hub, 322-blade;

4-fan motor, 41-inner stator, 42-outer rotor, 44-motor housing, 44 a-motor receiving cavity, 44 b-mounting opening, 44 c-connecting hole, 441-bottom plate, 442-side plate, 45-first flange, 46-second flange, 46 a-threaded hole, 47-fastener, 48-end cap, 481-second blocking portion, 49-stator bearing, 491-stator central shaft;

5-rotating shaft, 51-fan rotating shaft, 51 a-flat position, 52-motor rotating shaft, 53-first blocking part and 54-rotating shaft body;

6-bearing bracket, 61-rotating bearing, 611-flange, 62-bracket bottom plate, 621-positioning structure, 63-bracket side plate, 63 a-bearing mounting hole, 64-bearing cover;

7-a shock absorbing member;

8-coupling, 81-coupling body, 81 a-coupling bore, 81 b-first threaded bore, 81 c-second threaded bore, 82-first threaded member, 83-second threaded member;

9-a distribution box;

X-length direction, M-first preset gap and N-second preset gap.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, they may be fixedly connected, detachably connected, or of unitary construction, they may be mechanically or electrically connected, they may be directly connected, or they may be indirectly connected through intermediaries, or they may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

With the pursuit of people for proper indoor temperature, air conditioners become the choice for meeting the indoor temperature demands of people. An air conditioner, i.e., an air conditioner, is an apparatus for adjusting and controlling parameters such as temperature, humidity, flow rate, etc. of ambient air in a building or structure by manual means. The indoor air temperature, humidity, flow rate and other parameters can be effectively regulated, and great convenience is brought to the life of people.

Along with the improvement of life quality and the change of aesthetic ideas, people are not only satisfied with the basic performance of the air conditioner, but are more focused on the coordination and unification of the appearance and the indoor decoration style, the cost performance and the aesthetic degree of the indoor environment after the installation.

An air duct type air conditioner (abbreviated as an air duct machine) is one of various types of air conditioners, and is generally designed in an embedded manner, an indoor unit is hidden in a suspended ceiling, and an air supply opening and an air return opening are only exposed in a room. The hidden installation not only avoids the problem that the traditional air conditioner occupies indoor space, but also keeps the whole beautiful appearance of indoor decoration. And the air duct type air conditioner can be suitable for various house types and decoration styles. The air duct type air conditioner can be perfectly integrated with indoor decoration whether small house type or large house type, and whether modern simple style or Chinese classical style. In addition, the air duct type air conditioner can meet different requirements of different rooms on temperature and humidity in a partition control mode. Therefore, the air duct type air conditioner becomes more and more people to choose the air conditioner due to the characteristics of high aesthetic degree, strong adaptability, high cost performance and the like.

The air pipe type air conditioner comprises an air pipe type air conditioner, wherein a heat exchange component, a fan and a motor are arranged in an indoor unit of the air pipe type air conditioner, the motor drives the fan to rotate so that air flow outside the indoor unit enters the indoor unit from an air inlet of the indoor unit, and the air flow passes through the fan and exchanges heat with an indoor heat exchanger and is then output to the indoor unit from an air outlet of the indoor unit. In the related art, a motor of an indoor unit of an air duct type air conditioner is selected to drive a plurality of centrifugal fans by an inner rotor motor, wherein the inner rotor motor is a direct current motor, a rotor of the direct current motor is provided with permanent magnets, a stator of the direct current motor is provided with coils, and the rotor and the stator of the inner rotor motor are usually tightly combined to form a whole. The inner rotor motor is driven by electromagnetic induction, so that the motor generates larger vibration and noise due to the change of electromagnetic force inside the motor. When in operation, the temperature of the rotor rises, and the heat dissipation performance of the inner rotor motor is poor because the rotor of the inner rotor motor is positioned inside the motor. And, the inner rotor motor among the correlation technique sets up the intermediate position between a plurality of centrifugal fans, and the pivot of inner rotor motor links firmly with the pivot of fan together for dismantle and maintenance become relatively difficult when need to maintain or change the motor, probably need dismantle the fan earlier just can dismantle the motor to the operable space of motor is little, is unfavorable for directly maintaining the motor, has increased maintenance cost and time.

Based on the above, the embodiment of the application provides an air conditioner, which adopts an outer rotor motor, the motor is arranged outside a first side plate of a casing of an indoor unit, so that the fan motor can be conveniently maintained or replaced, the motor can be maintained directly from the side surface of the casing without being detached when the fan motor needs to be maintained, and the motor can be detached from the outside of the casing when the fan motor needs to be replaced, so that a larger operable space is provided for maintenance personnel.

The present technical solution will be further described with reference to examples and drawings.

Referring to fig. 1, an embodiment of the present application provides a ducted air conditioner 100, where the ducted air conditioner 100 includes an indoor unit 101, the indoor unit 101 is an important component of the ducted air conditioner 100, and the indoor unit 101 performs an air conditioning cycle by using an air supply system and a related heat exchange system. This cycle encompasses a series of processes including air intake, heat exchange, air flow pushing and temperature regulation to provide the proper temperature and air quality for the indoor space. And the air supply system generates strong air flow to suck the indoor air into the air duct type air conditioner. The sucked air then flows through the heat exchange system to absorb heat from the air, achieve a cooling effect, and transfer the heat to the refrigerant through the heat exchange process. The cold air after heat exchange treatment is pushed back to the indoor space under the action of the air supply system to form circulation.

Through the circulation process, the temperature regulation of the indoor space is realized, the indoor air quality is improved through the circulation of air flow, and a comfortable and healthy indoor environment is provided for users. In this embodiment, the indoor unit 101 is hung on the top of the room.

The indoor unit 101 includes a casing 1, a casing accommodating chamber 10 is formed in the casing 1, and a condenser and the like are disposed in the casing accommodating chamber 10. The casing 1 is provided with a casing air inlet 1a and a casing air outlet 1b, the casing air inlet 1a is used for guiding air flow into the casing 1, and the casing air outlet 1b is used for guiding air flow to the indoor.

As shown in fig. 4, the casing 1 includes a first side plate 11, the first side plate 11 is located at one end of the casing 1 along the length direction X, and the first side plate 11 is provided with a via hole 11a.

As shown in fig. 5 and 6, the casing 1 further includes a partition plate 12, the partition plate 12 is disposed in the casing accommodating chamber 10, the partition plate 12 divides the casing accommodating chamber 10 into an air inlet chamber 10a and an air outlet chamber 10b, the air inlet chamber 10a is communicated with the casing air inlet 1a, and the air outlet chamber 10b is communicated with the casing air outlet 1 b.

As shown in fig. 6, the indoor unit 101 further includes an indoor heat exchanger 2, where the indoor heat exchanger 2 is disposed in the air outlet chamber 10b and is used for exchanging heat with the air flowing through, and the indoor heat exchanger 2 is a heat exchanger, which uses the characteristic that the liquid low-temperature refrigerant is easy to evaporate at low pressure, and absorbs the heat of the cooled medium to reduce the temperature of the ambient air, thereby achieving the refrigerating effect, and the cool air cooled by the indoor heat exchanger 2 is sent back to the room through the air supply system, so as to provide a comfortable environment for the room. Particularly in hot summer, the refrigerating effect of the indoor heat exchanger 2 can obviously reduce the indoor temperature and improve the living comfort of people.

Referring to fig. 2 and 7, the indoor unit 101 further includes a plurality of centrifugal fans 3, the plurality of centrifugal fans 3 are coaxially disposed in the air inlet chamber 10a along the length direction X of the casing 1, air inlets of the plurality of centrifugal fans 3 are communicated with the air inlet chamber 10a, air outlets of the plurality of centrifugal fans 3 are communicated with the air outlet chamber 10b, and the centrifugal fans 3 are used for introducing air flow into the casing 1 from the casing air inlet 1a and outputting the air flow outwards from the casing air outlet 1b after exchanging heat with the indoor heat exchanger 2. The air flow can be led into the interior of the shell 1 through the centrifugal fan 3, so that the air flow is subjected to heat exchange of the indoor heat exchanger 2 and then is sent back to the indoor under the action of the centrifugal fan 3.

As shown in fig. 7, the centrifugal fan 3 includes a scroll case 31 and an impeller 32, the scroll case 31 is provided in the housing chamber 10 and is connected to the housing 1, the scroll case 31 is one of important components of the centrifugal fan 3, the scroll case 31 is for guiding an air flow, the scroll case 31 is designed to be capable of rotating along a curved shape of the scroll case when the air flow passes through the centrifugal fan 3, and gradually accelerating, and kinetic energy of the air flow increases due to the shape of the scroll case when the air flow passes through the scroll case 31. An impeller 32 is rotatably provided in the scroll casing 31, and the impeller 32 rotates to cause the air flow to flow in the casing 1.

Referring to fig. 2 and 8, the indoor unit 101 further includes a fan motor 4, where the fan motor 4 is disposed outside the first side plate 11, and the fan motor 4 is configured to drive the plurality of impellers 32 of the plurality of centrifugal fans 3 to rotate simultaneously.

As shown in fig. 8, the fan motor 4 includes an inner stator 41, an outer rotor 42, and an end cover 48, the outer rotor 42 is disposed around the inner stator 41, the outer rotor 42 is rotatable relative to the inner stator 41, and the end cover 48 is connected to the outer rotor 42.

The indoor unit 101 further includes a rotating shaft 5, where the rotating shaft 5 is connected to the end cover 48 and extends into the air intake cavity 10a through the through hole 11a, and the rotating shaft 5 is respectively in transmission 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.

Since the outer rotor 42 of the fan motor 4 is circumferentially disposed outside the inner stator 41, heat dissipation of the outer rotor 42 is more effective, and heat dissipation of the fan motor 4 is better. Meanwhile, since the gap between the outer rotor 42 and the inner stator 41 is set, mechanical friction is not generated, so that the fan motor 4 is quieter in the operation process.

In addition, the fan motor 4 for 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 maintained, the fan motor 4 can be maintained directly from the side surface of the first side plate 11 of the casing 1 without detaching the fan motor 4, the operation space outside the first side plate 11 is large, and the operation is convenient.

It should be noted that, in the embodiment of the application, the selected fan motor 4 is an outer rotor motor, compared with an inner rotor motor, the outer rotor motor is positioned outside the stator, and due to the structure, the outer rotor motor has more stable characteristics when outputting torque, can provide higher torque, thereby ensuring that the centrifugal fan 3 can provide stronger wind force when running at high speed, and due to the positioning of the rotor outside, the heat dissipation of the fan motor 4 is more effective, the service life of the fan motor 4 can be prolonged, and in addition, the outer rotor motor has better stability and durability under high load condition, the service life of the indoor unit 101 can be prolonged, meanwhile, the outer rotor motor is generally quieter than the inner rotor motor in the running process, the noise generated by the rotation of the fan motor 4 can be further reduced, and the outer rotor motor has relatively simple structure, convenient assembly and disassembly and can reduce the maintenance difficulty of the fan motor 4.

Referring to fig. 3 and 5, the indoor unit 101 further includes a bearing support 6, the bearing support 6 is located at one side of the centrifugal fans 3 away from the fan motor 4 along the length direction X of the casing 1, and detachably connected to the partition 12, a rotating bearing 61 is disposed in the bearing support 6, the rotating shaft 5 is disposed in the rotating bearing 61 in a penetrating manner, and the rotating shaft 5 is rotatably connected with the bearing support 6 through the rotating bearing 61.

Because the bearing bracket 6 is connected to the upper top plate or the lower bottom plate of the casing 1, an operator needs to extend a hand into the casing 1 and bend the wrist upwards or downwards to operate the bearing bracket 6 in the process of installing or detaching the bearing bracket 6, and the installation or detaching condition of the bearing bracket 6 cannot be intuitively seen. Therefore, the bearing bracket 6 is detachably connected to the partition board 12, so that an operator can directly perform connection operation between the bearing bracket 6 and the partition board 12 in the direction towards the partition board 12, the visibility of the connection part of the bearing bracket 6 and the partition board 12 is higher, the situation that hands extend into the casing 1 is avoided, the bearing bracket 6 is operated under the condition that the observation is inconvenient, convenience and quickness in assembling the bearing bracket 6 are ensured, and the improvement of the assembling efficiency of the indoor unit 101 is facilitated.

And, owing to adopted a plurality of centrifugal fans 3, the length of pivot 5 will increase, when fan motor 4 drive pivot 5 rotates, the one end that fan motor 4 was kept away from to pivot 5 and the distance of actuating source are farther, can make the pivot 5 keep away from the one end of fan motor 4 produce great shake, through the rotation connection of pivot 5 and bearing bracket 6, just provide the support for the one end that fan motor 4 was kept away from to pivot 5, avoided connecting the centrifugal fan 3 that fan motor 4 was kept away from in pivot 5 one end produces the shake, guaranteed the steady operation of centrifugal fan 3. The swivel bearings 61 in the bearing brackets 6 also provide accurate support for the rotation of the shaft 5, helping to further ensure stability and reliability of the centrifugal fan 3 during operation.

Because the bearing bracket 6 has certain rigidity and stability, when the rotating shaft 5 of the centrifugal fan 3 rotates under the support of the bearing bracket 6, the vibration generated by the centrifugal fan 3 in the running process can be effectively reduced. Meanwhile, vibration generated in the running process of the centrifugal fan 3 can be directly transmitted to the casing 1, resonance can be generated on other components in the indoor unit 101, and additional noise is generated, however, when the bearing support 6 is connected to the partition plate 12, the vibration in the running process of the centrifugal fan 3 is indirectly transmitted to the partition plate 12 through the bearing support 6, the vibration in the running process of the centrifugal fan 3 is prevented from being directly transmitted to the casing 1, the resonance effect of other components in the indoor unit 101 can be effectively reduced, and the overall noise level of the indoor unit 101 is reduced.

It should be noted that there are various manners of detachable connection between the bearing support 6 and the partition 12, such as a threaded connection, a snap connection, or a pin connection, which is not particularly limited in this embodiment.

In some embodiments, referring to fig. 2, 9 and 10, the fan motor 4 further includes a motor housing 44, the motor housing 44 is located outside the casing 1 and is detachably connected with the casing 1, the motor housing 44 is formed with a motor accommodating cavity 44a, the inner stator 41 is disposed in the motor accommodating cavity 44a and is connected with the motor housing 44, the outer rotor 42 is located in the motor accommodating cavity 44a, the outer rotor 42 is disposed outside the inner stator 41 in a surrounding manner, the outer rotor 42 can rotate relative to the inner stator 41, a motor rotating shaft 52 is connected with the outer rotor 42, the motor rotating shaft 52 extends into the casing accommodating cavity 10 through the casing 1, and the motor rotating shaft 52 is respectively in transmission connection with the impellers 32 of the centrifugal fans 3 so as to drive the impellers 32 to rotate synchronously when the outer rotor 42 rotates.

Because the motor housing 44 of the fan motor 4 is detachably connected to the outside of the casing 1, the inner stator 41 and the motor housing 44 are connected together, and the outer rotor 42 is arranged in the motor accommodating cavity 44a of the motor housing 44, when the fan motor needs to be maintained, the fan motor 4 can be maintained directly from the side surface outside the casing 1 without detaching the fan motor 4, the operation space outside the casing 1 is large, and the operation is convenient.

In some embodiments, as shown in fig. 10, the motor housing 44 has a mounting opening 44b toward the casing 1, and the inner stator 41 and the outer rotor 42 are mounted in the motor accommodating chamber 44a through the mounting opening 44b of the motor housing 44.

The mounting opening 44b arranged towards the casing 1 through the motor housing 44 enables the inner stator 41 and the outer rotor 42 to conveniently enter the motor accommodating cavity 44a through the mounting opening 44b of the motor housing 44, thereby simplifying the mounting process of the inner stator 41 and the outer rotor 42 and the motor housing 44 in the fan motor 4. The maintenance personnel or the production personnel can quickly complete the assembly of the fan motor 4 without complex disassembly or adjustment. When it is necessary to disassemble or replace the internal components of the fan motor 4, a serviceman can easily take out the key components such as the inner stator 41, the outer rotor 42, etc. through the mounting port 44b of the motor housing 44 to perform necessary maintenance or replacement.

The shape of the mounting opening 44b of the motor housing 44 may be circular, rectangular, or other patterns, which is not particularly limited in this embodiment. Illustratively, as shown in fig. 10, the mounting opening 44b of the motor housing 44 is circular in shape, and the circular mounting opening 44b is better adapted to the outer shape of the inner stator 41 and the outer rotor 42 of the fan motor 4, facilitating the mounting of the inner stator 41 and the outer rotor 42.

In some embodiments, referring to fig. 9 and 10, the motor housing 44 further includes a first flange 45, the first flange 45 being disposed along a circumference of the mounting opening 44b of the motor housing 44, the first flange 45 being for connecting the motor housing 44 with the casing 1.

The first flange 45 serves as a connecting member between the motor housing 44 and the casing 1, and can enhance the overall structural strength of the fan motor 4. The first flange 45 is disposed around the mounting opening 44b of the motor housing 44 like a reinforcing ring, and can effectively resist external impact and vibration, improving the stability and durability of the fan motor 4.

It will be appreciated that the first flange 45 is typically used in conjunction with a gasket or sealant to ensure isolation of the interior of the motor from the external environment. Through the arrangement of the first flange 45, external pollutants such as dust, moisture and the like can be prevented from entering the inside of the fan motor 4 more effectively, the inside of the fan motor 4 is kept clean and dry, and the service life of the fan motor 4 is prolonged.

In some embodiments, referring to fig. 9 to 11, the fan motor 4 further includes a second flange 46, where the second flange 46 is disposed at an end of the inner stator 41 away from the first side plate 11 and is fixedly connected to the inner stator 41, and the second flange 46 is connected to the motor housing 44.

The second flange 46 serves as a connection member between the inner stator 41 and the motor housing 44, not only realizes connection of the inner stator 41 and the motor housing 44, but also remarkably enhances the overall structural strength of the fan motor 4, and firmly connects the inner stator 41 to the motor housing 44, thereby improving the stability and durability of the fan motor 4.

In some embodiments, referring to fig. 2 and 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 includes a fastener 47, and the fastener 47 is connected to the connecting hole 44c through the threaded hole 46 a.

A stable and reliable connection can be made by the fastener 47 being connected to the connection hole 44c on the motor housing through the screw hole 46 a. This connection can withstand large tensile and shearing forces, ensure firm connection between the inner stator 41 and the motor housing 44, and prevent loosening due to vibration or impact. The provision of the threaded hole 46a and the connecting hole 44c makes the installation process simpler and more intuitive. When the second flange 46 needs to be detached or replaced, the second flange 46 and the motor housing 44 can be easily separated only by detaching the fastener 47, so that maintenance cost and time cost are reduced.

The fastener 47 may be a screw, a threaded pin, a stud, or other fasteners, which is not particularly limited in this embodiment.

In some embodiments, referring to fig. 9 and 11, the motor housing 44 includes a bottom plate 441 and a side plate 442, the side plate 442 being disposed around a circumference of the bottom plate 441, and the second flange 46 being connected to the bottom plate 441.

The bottom plate 441 serves as a bottom support for the motor housing 44, providing a stable foundation for the entire fan motor 4. It can bear the weight of the fan motor 4 and vibration and impact during operation, ensuring stable operation of the fan motor 4. The side plate 442 is disposed circumferentially around the bottom plate 441, and forms a main body structure of the motor housing 44 together with the bottom plate 441. This not only enhances the overall rigidity of the motor housing 44, but also enhances its resistance to deformation, ensuring that the fan motor 4 maintains a stable shape and size under various operating conditions. The second flange 46 is connected to the bottom plate 441, and the second flange 46 also serves as a connecting member between the inner stator 41 and the motor housing 44, and functions to transmit and disperse stress, improving the overall strength and durability of the fan motor 4.

In some embodiments, referring to fig. 12 and 16, the bearing support 6 includes a support base 62, the support base 62 being connected to the spacer 12 by fasteners.

The support bottom plate 62 is connected with the partition plate 12 through the fastener, so that the connection between the bearing support 6 and the partition plate 12 is firmer, the support bottom plate 62 and the partition plate 12 can be separated by disassembling the fastener, the disassembling process becomes quicker, and the subsequent maintenance and replacement of the bearing support 6 are facilitated.

In some embodiments, the support base plate 62 of the bearing support 6 is arranged on the side of the support side plate 63 remote from the centrifugal fan 3. If the bracket base 62 is provided at a side close to the centrifugal fan 3, the rotation shaft 5 for driving the centrifugal fan 3 to rotate is blocked on the installation path of the bearing bracket 6, and it is inconvenient to install or detach the bearing bracket 6. Therefore, the bracket bottom plate 62 is provided on a side away from the centrifugal fan 3, so that it can be ensured that the bracket bottom plate is not blocked by the rotating shaft 5 during mounting or dismounting, and normal mounting of the bearing bracket 6 is ensured.

In some embodiments, referring to fig. 12 and 16, the bearing support 6 further includes a positioning structure 621, the positioning structure 621 is disposed on the support base plate 62, and the support base plate 62 and the partition 12 are pre-positioned by the positioning structure 621.

When the bearing support 6 is installed, the positioning structure 621 and the partition plate 12 can be used for carrying out the positioning in advance, so that the accuracy of the installation position of the bearing support 6 is ensured, the installation position of the bearing support 6 can be determined only through the positioning structure 621, and the bearing support 6 can be connected by using the fastener after the positioning in advance, so that the installation and the disassembly processes of the bearing support 6 are more convenient, and the efficiency of the installation of the bearing support 6 is improved.

Also, the partition 12 provides a stable supporting base for the entire bearing bracket 6, which ensures that the bearing bracket 6 can withstand various forces and vibrations generated when the centrifugal fan 3 is operated, thereby maintaining the stability when the centrifugal fan 3 is operated.

It should be noted that the positioning structure 621 may be a positioning protrusion, a positioning column, a positioning hole or other structures capable of achieving positioning, that is, the positioning protrusion or the positioning column may be disposed on the partition board 12, the positioning hole is disposed on the support bottom board 62, and the positioning protrusion or the positioning column is disposed in the positioning hole in a penetrating manner to achieve the positioning of the support bottom board 62 and the partition board 12. Alternatively, the partition 12 may be provided with positioning holes, and the bracket base 62 may be provided with positioning protrusions or positioning columns, which are not particularly limited in this embodiment.

The bearing bracket 6 further includes a bracket side plate 63, the bracket side plate 63 is connected to the bracket bottom plate 62, the bracket side plate 63 is provided with a bearing mounting hole 63a, and the swivel bearing 61 is located in the bearing mounting hole 63 a.

The support side plate 63 is provided with a bearing mounting hole 63a, and the rotating bearing 61 is positioned in the bearing mounting hole 63a, so that the stability and the reliability of the rotating shaft 5 in the rotating process are ensured, and the faults caused by loosening or abrasion of the rotating bearing 61 are reduced. The bracket side plates 63 and the bracket bottom plate 62 form a stable frame structure, and the design helps to improve the overall rigidity of the bearing bracket 6 and enhance the capability of bearing external force.

In some embodiments, referring to fig. 3 and 16, the outer ring of the rotary bearing 61 has a flange 611 in the radial direction of the rotary shaft 5, and the flange 611 abuts against a surface of the side of the bracket side plate 63 remote from the centrifugal fan 3.

The bearing bracket 6 further comprises a bearing cover 64, the bearing cover 64 being connected to the side of the bracket side plate 63 remote from the centrifugal fan 3, and the flange 611 being press-fixed to the bracket side plate 63.

Since the swivel bearing 61 may be separated from the bearing mounting hole 63a of the bracket side plate 63 from the side of the bracket side plate 63 away from the centrifugal fan 3, the flange 611 of the swivel bearing 61 can be pressed and fixed on the bracket side plate 63 by the bearing cover 64 connected to the side of the bracket side plate 63 away from the centrifugal fan 3, and the swivel bearing 61 is further limited in the axial direction, so that the swivel bearing 61 is prevented from being separated from the bearing mounting hole 63a, and the stability and reliability of the rotation of the rotating shaft 5 are ensured.

Also, the bearing cover 64 can effectively prevent foreign substances such as dust, moisture, etc. from entering the inside of the slew bearing 61, thereby enhancing the sealability of the slew bearing 61.

In some embodiments, the indoor unit 101 further includes a damper 7, and the damper 7 is disposed between the motor housing 44 and the casing 1. In this way, by providing the damper 7 between the motor housing 44 and the casing 1, 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, reducing noise and component wear due to vibration.

In some embodiments, in combination with fig. 2 and 3, the shock absorber 7 is a rubber pad. Since the rubber pad has high elasticity and good damping performance, vibration energy generated by the operation of the fan motor 4 can be effectively absorbed and dispersed. And the rubber pad not only has damping performance, but also has certain sound insulation effect. The fan motor 4 can effectively isolate and weaken noise generated by vibration of the fan motor 4, and reduce the transmission of the noise to the machine shell 1 and the external environment.

It should be noted that, in addition to the rubber pad described in the above embodiment, the damping member 7 may be polyurethane, a shockproof steel plate, or other materials capable of absorbing the vibration of the fan motor 4 during operation, which is not limited in this embodiment. The shock absorbing member 7 may be, for example, polyurethane, which is a polymer material having excellent shock absorbing performance, and the provision of the polyurethane shock absorbing member between the motor housing 44 and the casing 1 may effectively reduce the propagation of vibration and noise. The damping member 7 may be a vibration-proof steel plate, which is a metal material having excellent strength and corrosion resistance, and may be formed in a corrugated shape by a specific knot or by adding a damping layer to achieve a damping effect between the motor housing 44 and the casing 1.

In some embodiments, as shown in fig. 7, the impeller 32 includes a hub 321, the hub 321 having a central bore, the hub 321 being the main body structure of the impeller 32.

The impeller 32 further includes blades 322, the blades 322 are connected to the outer circumference of the hub 321, and the blades 322 rotate along with the hub 321 to realize air outlet.

The rotation shaft 5 includes a fan rotation shaft 51, and the fan rotation shaft 51 is connected to the center holes of the plurality of hubs 321, respectively, and is capable of transmitting torque to the plurality of hubs 321.

The rotating shaft 5 further comprises a motor rotating shaft 52, the motor rotating shaft 52 is connected to the outer rotor 42, and the motor rotating shaft 52 and the fan rotating shaft 51 are coaxially arranged and connected through the coupling 8.

The motor rotating shaft 52 and the fan rotating shaft 51 are connected through the coupler 8, so that the motor rotating shaft is convenient to detach and replace. When the fan motor 4 needs to be maintained or replaced, the motor rotating shaft 52 and the fan rotating shaft 51 can be easily separated only by detaching the coupler 8, so that subsequent operation is convenient. In addition, the fan rotating shafts 51 of the plurality of impellers 32 are integrally connected, so that an integral fan system can be formed, the plurality of impellers 32 can synchronously rotate, and the energy transmission efficiency and the energy conversion efficiency are improved. In addition, the fan rotating shaft 51 is connected to the central hole of the hub 321 and is capable of transmitting torque to the hub 321, which ensures efficient transmission of torque from the motor rotating shaft 52 to the fan rotating shaft 51, reducing loss of energy during transmission.

In some embodiments, referring to fig. 13 and 14, the coupling 8 includes a coupling body 81, a coupling shaft hole 81a is provided in the coupling body 81, a first end of the fan rotation shaft 51 and a first end of the motor rotation shaft 52 are respectively disposed at two ends of the coupling shaft hole 81a, the coupling body 81 is further provided with a first screw hole 81b and a second screw hole 81c, and the first screw hole 81b and the second screw hole 81c are respectively communicated with the coupling shaft hole 81 a.

The coupling 8 further includes a first screw 82, and the first screw 82 is screw-engaged with the first screw hole 81b to fasten the first end of the fan rotation shaft 51.

The coupling 8 further includes a second screw 83, and the second screw 83 is screw-engaged with the second screw hole 81c to fasten the first end of the motor shaft 52.

In this way, the design of the connecting shaft hole 81a in the coupling body 81 enables the first end of the fan rotating shaft 51 and the first end of the motor rotating shaft 52 to be respectively arranged at two ends of the connecting shaft hole 81a in a penetrating manner, so that the accurate alignment of the axes is realized, the vibration and noise generated by the misalignment of the axes can be reduced, and the stability and reliability of the rotation of the rotating shaft are improved.

The first screw 82 is screwed into the first screw hole 81b, and the second screw 83 is screwed into the second screw hole 81c, thereby fastening the fan shaft 51 and the motor shaft 52 to the coupling body 81. The fastening mode is simple and convenient, and can provide reliable connection strength, so that the rotating shaft is ensured not to loosen or fall off when rotating at a high speed.

Further, since the first screw 82 and the second screw 83 are connected to the coupling body 81 by screw-fitting, the motor shaft 52, the fan shaft 51 and the coupling body 81 can be easily removed and replaced. When the rotation shaft is required to be maintained or replaced, the rotation shaft and the coupling body 81 can be easily separated only by unscrewing the corresponding screw member, thereby simplifying the maintenance process.

Specifically, the first screw 82 and the second screw 83 may be studs, the motor shaft 52 and the fan shaft 51 are extended into the shaft hole 81a, and the studs corresponding to the first screw hole 81b and the second screw hole 81c are screwed into the corresponding screw holes, so that the connection between the motor shaft 52 and the fan shaft 51 can be achieved. Of course, the first screw 82 and the second screw 83 may be threaded fasteners such as screws, bolts, threaded pins, and the like, which are not particularly limited in this embodiment.

In some embodiments, referring to fig. 7 and 13, a flat 51a is provided on a portion of the fan rotating shaft 51 for connection with a central hole of the hub 321, and the central hole of the hub 321 is shaped to fit the flat 51 a.

The fan rotating shaft 51 and the hub 321 are matched through the flat position 51a, so that the fan rotating shaft 51 can more directly transmit the torque transmitted by the fan motor 4 to the hub 321, the loss of the torque between the fan rotating shaft 51 and the hub 321 in the transmission process is reduced, and the impeller 32 is fully rotated under the driving of the fan rotating shaft 51.

And, flat 51a is as a planar structure, can provide accurate locate function, and the adaptation design of flat 51a and the centre bore of wheel hub 321 can ensure that fan pivot 51 and the centre bore of wheel hub 321 are aligned accurately for the connection between fan pivot 51 and the wheel hub 321 is inseparabler and firm, and this has reduced vibration and noise that produces because of the connection is not hard up or not centering, has improved stability and the reliability of system. In the case of high-speed rotation, the connection between the fan rotation shaft 51 and the hub 321 can still be kept tight, and loosening or falling off is not easy to occur.

Meanwhile, the design of the flat 51a makes the section shape of the fan rotating shaft 51 more reasonable, thereby enhancing the bearing capacity thereof. Under the conditions of high-speed rotation and bearing larger torque, the fan rotating shaft 51 can still maintain stable performance, deformation or fracture is not easy to occur, the service life and reliability of the fan rotating shaft 51 are prolonged, and maintenance time and maintenance cost caused by faults are reduced.

It should be noted that, in addition to the connection between the fan rotating shaft 51 and the hub 321 through the flat portion 51a in the above embodiment, the connection between the fan rotating shaft 51 and the hub 321 may be also realized through a key connection, or a rubber gasket is used between the fan rotating shaft 51 and the hub 321, which is not limited in this embodiment. When the fan rotating shaft 51 is connected with the hub 321 through keys, a matched key slot is formed on each of the fan rotating shaft 51 and the hub 321, and then the keys are embedded into the key slots to realize connection, so that the cost of the connection mode is low.

In some embodiments, the impeller 32 includes a hub 321, the hub 321 having a central bore. Impeller 32 further includes blades 322, blades 322 being attached to the outer periphery of hub 321.

The rotation shaft 5 includes motor rotation shafts 52, and the motor rotation shafts 52 are respectively connected to center holes of the hubs 321 of the plurality of impellers 32 and are capable of transmitting torque to the hubs 321.

Since the motor shaft 52 is directly connected to the center holes of the hubs 321 of the plurality of impellers 32, this enables torque to be directly and efficiently transmitted to each impeller 32. The design reduces the loss of energy in the transmission process and improves the overall energy transmission efficiency of the system. Also, the design of the central bore of the hub 321 with the motor shaft 52 directly connected to the plurality of impellers 32 reduces the use of intermediate drive components, which reduces not only the complexity and cost of the system, but also downtime and maintenance costs due to drive component failure.

In some embodiments, referring to fig. 15 to 16, an end of the rotating shaft 5 near the bearing support 6 has a first blocking portion 53, and the first blocking portion 53 corresponds to the rotating bearing 61 along the axial direction of the rotating shaft 5. That is, when the first blocking portion 53 on the rotating shaft 5 is in contact with the end face of the rotating bearing 61, the first blocking portion 53 can block the rotating shaft 5 from continuing to move toward the bearing bracket 6 in the axial direction.

Through the arrangement of the first blocking part 53, the axial position of the rotating shaft 5 is effectively limited and fixed at the end face of the rotating bearing 61 in the rotating process, so that the rotating shaft 5 can be prevented from axially moving to one side of the bearing bracket 6 due to uneven stress or vibration and the like, and the stability of the rotating shaft 5 is enhanced. The stable rotating shaft 5 can ensure the normal operation of the centrifugal fan 3, reduce noise and vibration generated by the axial movement of the rotating shaft 5, and improve the overall performance of the centrifugal fan 3.

In some embodiments, referring to fig. 8 and 16, the shaft 5 is fixedly coupled to the center of the end cap 48, and the outer rotor 42 is coupled within the end cap 48.

Because the rotating shaft 5 is fixedly connected to the center of the end cover 48, and the outer rotor 42 is connected to the end cover 48, the rotating shaft 5 is driven by the outer rotor 42 to rotate more stably, vibration and noise generated by axial shaking of the rotating shaft 5 are reduced, and the running stability of the rotating shaft 5 is improved.

In some embodiments, referring to fig. 3 and 17, the fan motor 4 further includes a stator bearing 49, and the stator bearing 49 is disposed at the center of the inner stator 41.

The rotating shaft 5 further comprises a rotating shaft body 54 and a stator central shaft 491, a first end of the stator central shaft 491 penetrates through the stator bearing 49, and a second end of the stator central shaft 491 is connected with the rotating shaft body 54.

The stator bearing 49 is disposed at the center of the inner stator 41, and the stator central shaft 491 is connected with the rotating shaft body 54, so that connection between the inner stator 41 and the outer rotor 42 is realized, the centers of the inner stator 41 and the outer rotor 42 are ensured to be on the same axis, vibration between the inner stator 41 and the outer rotor 42 is reduced, the service life of the fan motor 4 is prolonged, and the stator central shaft 491 and the stator bearing 49 also provide additional support for the inner stator 41.

In some embodiments, the spindle body 54 has a central bore, and the second end of the stator central shaft 491 is disposed through the central bore of the spindle body 54.

The stator central shaft 491 is arranged in the central hole of the rotating shaft 5 in a penetrating way, which provides additional support for the rotating shaft 5, enhances the stability of the rotating shaft 5 in high-speed rotation, ensures that the center of the stator central shaft 491 and the center of the rotating shaft body 54 are on the same axis, and is beneficial to reducing vibration and noise in the running process of the fan motor 4 and improving the overall performance of the fan motor 4.

In some embodiments, the shaft body 54 is integrally formed with the stator central shaft 491. This ensures the coaxiality of the rotating shaft body 54 and the stator central shaft 491, prevents the problem of shaking of the stator central shaft caused by the unstable connection between the rotating shaft body 54 and the stator central shaft 491, and ensures the stability of the fan motor 4 during operation.

In some embodiments, as shown in fig. 17, the surface of the end cover 48 facing the inner stator 41 is provided with a second blocking portion 481, the second blocking portion 481 corresponding to the stator bearing 49 in the axial direction of the rotation shaft 5.

By the provision of the second blocking portion 481, the end cap 48 is made more structurally stable. The axial corresponding relation of the rotor shaft 5 and the stator bearing 49 effectively limits the movement of the rotor shaft 5 integrally formed on the end cover 48 to one side of the inner stator 41 in the axial direction, so that the stability and the reliability of the rotor shaft 5 are further enhanced, noise and vibration generated by shaking of the rotor shaft 5 are reduced, and the operation efficiency of the whole centrifugal fan 3 is further ensured.

In some embodiments, referring to fig. 17, a first preset gap M is formed between the second blocking portion 481 and the end surface of the stator bearing 49, a second preset gap N is formed between the surface of the end cover 48 facing the inner stator 41 and the inner stator 41, and the first preset gap M is smaller than the second preset gap N along the axial direction of the rotating shaft 5.

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 second preset gap N between the inner stator 41 are provided, so that the outer rotor 42 and the inner stator 41 are not contacted, but slight play can occur between the outer rotor 42 and the inner stator 41 along the axial direction of the rotating shaft 5, and the first preset gap M is smaller than the second preset gap N, so that when the rotating shaft 5 moves to the rightmost side in the axial direction, the outer rotor 42 is not collided with the inner stator 41, and normal operation of the fan motor 4 is ensured.

In some embodiments, the length of the shaft 5 extending into the swivel bearing 61 is greater than the width of the first predetermined gap M. Since the shaft 5 can move axially, in the process of moving the shaft 5 axially inward toward the stator 41, the length of the shaft 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 one end of the shaft 5, which is close to the inner stator 41, abuts against the stator bearing 49, one end of the shaft 5, which is close to the bearing bracket 6, is still located in the rotary bearing 61, and it is ensured that one end of the shaft 5, which is close to the bearing bracket 6, cannot deviate from the rotary bearing 61 during moving, and stable operation of the centrifugal fan 3 is ensured.

In some embodiments, referring to fig. 3, the casing 1 further includes a second side plate 13, where the second side plate 13 and the first side plate 11 are disposed opposite to each other along the axial direction of the rotation shaft 5.

The indoor unit 101 further includes a distribution box 9, the distribution box 9 is disposed outside the second side plate 13, and the fan motor 4 is electrically connected to the distribution box 9.

If the distribution box 9 is disposed inside the cabinet 1, the distribution box 9 occupies the internal space of the cabinet 1, resulting in a smaller installation space of other components disposed inside the cabinet 1, which may affect the normal operation of the other components. Moreover, the distribution box 9 is arranged inside the casing 1 and occupies part of the axial space, so that the space for air intake of the centrifugal fan 3 becomes smaller, and the air intake of the centrifugal fan 3 is affected. Therefore, the distribution box 9 is arranged on the second side plate 13, so that the air inlet of the centrifugal fan 3 is not influenced while other parts are ensured to normally operate without occupying the inner space of the shell 1.

In addition, since the fan motor 4 and the distribution box 9 are respectively located at two sides of the casing 1, when maintenance and overhaul are carried out, the fan motor 4 and the distribution box 9 can be independently maintained and overhauled, the situation that the fan motor 4 can be maintained only by dismantling the distribution box 9 when the fan motor 4 and the distribution box 9 are located at the same side is avoided, the maintenance difficulty is reduced, the working efficiency is improved, and meanwhile, the equipment fault risk caused by improper maintenance is also reduced. The electrical connection and inspection can be more conveniently performed by disposing the distribution box 9 outside the second side plate 13. Meanwhile, as a certain distance exists between the distribution box 9 and the fan motor 4, the risks of electric interference and short circuit can be reduced, so that the electric safety of the indoor unit 101 can be improved, and the use safety of a user can be guaranteed.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. An air duct type air conditioner, comprising:

An indoor unit, the indoor unit comprising:

the indoor heat exchanger is arranged in the air outlet cavity;

The impeller is rotationally arranged in the volute;

fan motor, fan motor set up in on the first curb plate, fan motor includes:

The inner stator is positioned outside the first side plate;

the end cover is connected with the outer rotor;

2. An air duct type air conditioner, comprising:

An indoor unit, the indoor unit comprising:

the indoor heat exchanger is arranged in the air outlet cavity;

The impeller is rotationally arranged in the volute;

a fan motor, the fan motor comprising:

the end cover is connected with the outer rotor;

3. The ducted air conditioner of claim 2, wherein the motor housing has a mounting opening toward the cabinet, and the inner and outer rotors are mounted in the motor receiving chamber through the mounting opening.

4. The ducted air conditioner of claim 3, wherein the motor housing further includes a first flange disposed along a circumference of the mounting opening, the first flange being configured to connect the motor housing with the first side plate.

5. The ducted air conditioner according to claim 2, wherein the fan motor further includes:

6. The ducted type air conditioner of claim 5, wherein,

The second flange is provided with a threaded hole;

The motor shell is provided with a connecting hole;

The fan motor further includes:

and the fastener passes through the connecting hole and is connected with the threaded hole.

7. The ducted air conditioner according to claim 5, wherein the motor housing includes:

A bottom plate;

8. The ducted air conditioner according to claim 1 or 2, characterized in that,

The bearing support includes:

9. The ducted type air conditioner of claim 8, wherein,

The support bottom plate is arranged on one side, far away from the centrifugal fan, of the support side plate.

10. The ducted air conditioner of claim 8, wherein the bearing bracket further comprises:

the positioning structure is arranged on the support bottom plate, and the support bottom plate and the partition plate are positioned in advance through the positioning structure.

11. The ducted type air conditioner of claim 8, wherein,

The outer ring of the rotary bearing is provided with a flange along the radial direction of the rotating shaft, and the flange is abutted with the surface of one side, far away from the centrifugal fan, of the bracket side plate;

The bearing support further comprises:

12. The ducted air conditioner according to claim 2, wherein the indoor unit further includes:

The damping piece is arranged between the motor shell and the shell.

13. The ducted air conditioner of claim 12, wherein the shock absorbing member is a rubber pad.

14. The ducted air conditioner according to claim 1 or 2, wherein the impeller includes:

A hub having a central bore;

a blade connected to an outer periphery of the hub;

The rotating shaft comprises:

15. The ducted air conditioner according to claim 14, wherein the coupling includes:

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

17. The ducted air conditioner according to claim 1 or 2, wherein the impeller includes:

A hub having a central bore;

a blade connected to an outer periphery of the hub;

The rotating shaft comprises:

18. The ducted air conditioner according to claim 1 or 2, wherein one end of the rotating shaft, which is close to the bearing bracket, is provided with a first blocking portion, and the first blocking portion corresponds to the rotating bearing in the axial direction of the rotating shaft.

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

20. The ducted air conditioner according to claim 19, wherein the fan motor further includes:

a stator bearing disposed at a center of the inner stator;

The rotating shaft comprises:

the rotating shaft body is connected with the end cover;

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

22. The ducted air conditioner according to claim 20, wherein the rotation shaft body is integrally formed with the stator central shaft.

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

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

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

26. The ducted air conditioner according to claim 1 or 2, wherein the casing further includes a second side plate, the second side plate and the first side plate being disposed opposite to each other in an axial direction of the rotating shaft;

The indoor unit further includes:

the distribution box, the distribution box set up in the second curb plate, fan motor with the distribution box electricity is connected.