Ceiling machine

Abstract

An indoor unit of the ceiling-mounted air conditioner comprises a machine shell, an indoor unit, a heat exchanger and a heat exchanger, a heat exchanger; the centrifugal fan is arranged in the housing accommodating cavity, the centrifugal fan comprises a hub, the hub sinks towards one side deviating from the top plate to form a groove, and a plurality of first connecting holes are formed in the bottom wall of the groove; a fan motor includes: an inner stator; the outer rotor is connected with the hub through a connecting structure; the connecting structure comprises a plurality of reinforcing pieces which are arranged on the side, away from the fan motor, of the groove bottom wall of the groove and correspond to the first connecting holes respectively, and each reinforcing piece is provided with a first through hole. And the plurality of first fastening pieces correspond to the plurality of first connecting holes respectively, one end of each first fastening piece is connected with the outer rotor, and the other end of each first fastening piece sequentially penetrates through the first connecting holes and the first through holes and is connected with the reinforcing piece. By adopting the scheme, the production cost can be reduced on the basis of ensuring that the joint of the outer rotor and the hub has enough structural strength.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment technology, and more particularly to a ceiling-mounted air conditioning unit. Background Technology

[0002] An air conditioner, also known as an air conditioner, is a device that uses artificial means to regulate and control parameters such as temperature, humidity, and airflow of the air inside a building or structure.

[0003] Currently, more and more people are choosing to install air conditioners indoors to regulate the temperature of the indoor air. Ceiling-mounted air conditioners are one type of air conditioner, and recessed ceiling-mounted units are mainly used in large spaces such as offices, classrooms, and shopping malls. They have the advantages of small footprint and good cooling / heating performance, making them very popular with users.

[0004] In the prior art, after the fan motor of the ceiling machine is connected to the fan hub, a large sheet metal part is installed on the lower surface of the fan hub to strengthen the structural strength of the connection between the fan motor and the fan hub. However, the use of a large sheet metal part results in a higher production cost for the ceiling machine. Utility Model Content

[0005] This application discloses a ceiling machine that can reduce production costs while ensuring sufficient structural strength at the connection between the outer rotor and the hub.

[0006] To achieve the above objectives, in a first aspect, some embodiments of this application provide a ceiling machine, comprising:

[0007] An indoor unit, comprising: a casing, the casing having a casing cavity; the casing including: a top plate for connecting to the top of the room; a panel opposite to the top plate, the panel having a casing air inlet and a casing air outlet; a heat exchanger disposed within the casing cavity; a centrifugal fan disposed within the casing cavity, the centrifugal fan having a vertically extending shaft, the heat exchanger surrounding the periphery of the centrifugal fan, the centrifugal fan for drawing airflow into the casing from the casing air inlet and blowing the heat-exchanged airflow out of the room from the casing air outlet; the centrifugal fan including: a hub, the hub being recessed to the side opposite to the top plate to form a groove, the bottom wall of the groove having multiple first connection holes; and a fan motor. The fan motor includes: an inner stator fixed relative to the top plate and at least partially located within the groove; an outer rotor surrounding the inner stator and rotatable relative to the inner stator, the outer rotor being connected to the hub via a connecting structure; the connecting structure includes: multiple reinforcing members disposed on the bottom wall of the groove away from the fan motor, each reinforcing member corresponding to a plurality of first connecting holes, each reinforcing member having a first through hole; and multiple first fasteners corresponding to a plurality of first connecting holes, one end of each first fastener being connected to the outer rotor, and the other end of each fastener passing through the first connecting hole and the first through hole in sequence, and connected to the reinforcing member.

[0008] Thus, when the outer rotor rotates, the shear force transmitted from the outer rotor to the hub is first transferred from the first fastener to the reinforcing member, where part of the shear force is borne. Then, the shear force is transferred from the reinforcing member to the hub, ensuring that the connection between the outer rotor and the hub will not deform or break due to excessive shear force. Furthermore, multiple reinforcing members can be installed individually, making assembly more convenient and faster, avoiding the need to align multiple first through holes with multiple first connecting holes simultaneously when installing a large reinforcing member. Simultaneously, when manufacturing a large reinforcing member, manufacturing tolerances are easily present between the multiple first through holes, thus requiring high manufacturing precision. This application uses multiple reinforcing members with lower manufacturing precision requirements, reducing the occurrence of situations where assembly is impossible due to manufacturing tolerances and requiring remanufacturing of the reinforcing member, thereby reducing production costs.

[0009] In some embodiments of this application, the connection structure further includes: a plurality of connection protrusions integrally formed on the bottom wall of the groove away from the surface of the fan motor, and corresponding to the plurality of first connection holes, the first connection holes penetrating the connection protrusions; a reinforcing member disposed at one end of the connection protrusion away from the bottom wall of the groove, and the first fastener being configured to press and fix the reinforcing member to the connection protrusion along the axial direction of the hub.

[0010] Thus, the connecting protrusion provides a mounting base for the reinforcing member, strengthening the structural strength near the first connecting hole on the bottom wall of the groove. Furthermore, the connecting protrusion and the reinforcing member work together to form a stable shear force transmission path, further improving the structural strength near the first connecting hole on the hub. The shear force generated by the rotation of the outer rotor is transmitted to the hub via the first fastener, the reinforcing member, and the connecting protrusion, reducing stress concentration and ensuring the normal rotation of the centrifugal fan.

[0011] In some embodiments of this application, the first fastener includes: a screw, one end of which is connected to the outer rotor, and the other end of which passes through the first connecting hole and the first through hole in sequence; and a nut, which is threadedly connected to the end of the screw away from the outer rotor and abuts against the reinforcing member along the extension direction of the screw.

[0012] In this way, on the one hand, sufficient preload can be provided to ensure a tight connection between the outer rotor, hub and reinforcement, improving the stability and reliability of the entire structure; on the other hand, the connection method of screw and nut is convenient for installation and disassembly. During installation, simply pass the screw through the first connecting hole and the first through hole in sequence, and then tighten the nut. When maintenance or replacement of parts is required, the nut can be loosened for disassembly. The operation is simple and convenient, improving maintenance efficiency.

[0013] In some embodiments of this application, the reinforcing member is a reinforcing cover, which is fitted onto one end of the connecting protrusion away from the bottom wall of the groove.

[0014] In this way, the reinforcing cover, fitted onto one end of the connecting protrusion, ensures that the force transmitted from the outer rotor is evenly distributed between the connecting protrusion and the reinforcing cover, preventing stress concentration. Furthermore, the reinforcing cover provides clear guidance for installation. During installation, simply align the reinforcing cover with the connecting protrusion and slip it on to achieve precise positioning, improving installation efficiency and avoiding connection problems caused by positional deviations.

[0015] In some embodiments of this application, the connection structure further includes: a plurality of reinforcing ribs distributed circumferentially along the connecting protrusion, the reinforcing ribs including adjacent first side and second side, the first side being connected to the outer peripheral wall of the connecting protrusion, and the second side being connected to the bottom wall of the groove away from the surface of the fan motor.

[0016] This further enhances the local strength and rigidity of the wheel hub at the bottom wall of the groove.

[0017] In some embodiments of this application, the reinforcing member is a sheet metal part.

[0018] In this way, a relatively light weight can be achieved while ensuring sufficient strength and rigidity. Furthermore, the raw material cost of sheet metal parts is relatively low, and sheet metal processing technology is mature and highly efficient, enabling large-scale mass production and thus reducing production costs.

[0019] In some embodiments of this application, the indoor unit further includes a first vibration damping member disposed between the outer rotor and the bottom wall of the groove.

[0020] In this way, the vibration generated during the operation of the external rotor can be effectively absorbed and isolated, reducing the vibration transmitted to the hub and casing, thereby reducing the overall noise level of the indoor unit and improving user comfort.

[0021] In some embodiments of this application, the hub includes: a plurality of bosses disposed on the bottom wall of the groove near the surface of the outer rotor, and the plurality of bosses respectively correspond to the plurality of connecting protrusions in the vertical direction; a plurality of first damping members are provided, the first damping members are sleeved on the outer periphery of the bosses, and the surface of the first damping members facing the outer rotor is provided with a plurality of protrusions, the protrusions abutting against the outer rotor in the vertical direction.

[0022] In this way, multiple bosses can disperse the stress transmitted from the outer rotor, avoid stress concentration, and reduce the risk of deformation and damage to the hub caused by stress concentration during high-speed operation. Furthermore, the bosses provide a base for the first vibration damper, making its installation more convenient; the first vibration damper can simply be fitted onto the boss. It is also easy to disassemble and replace during maintenance.

[0023] In some embodiments of this application, the indoor unit further includes a second vibration damping member disposed between the connecting protrusion and the reinforcing member.

[0024] Thus, by setting a second damping component between the connecting protrusion and the reinforcing member, the vibration generated during the operation of the outer rotor can be further absorbed and buffered, reducing the vibration transmitted to the hub and housing, thereby reducing noise and increasing the service life of the components.

[0025] Secondly, some embodiments of this application provide a ceiling-mounted air conditioner, including: an indoor unit, the indoor unit including: a casing, the casing having a casing receiving cavity formed therein, the casing including: a top plate, the top plate being for connecting to the top of the room, the top plate having a second through hole; a panel, the panel being disposed opposite to the top plate, the panel having a casing air inlet and a casing air outlet; a heat exchanger, the heat exchanger being disposed within the casing receiving cavity; a centrifugal fan, the centrifugal fan being disposed within the casing receiving cavity, the centrifugal fan having a shaft extending vertically, the heat exchanger being disposed around the outer periphery of the centrifugal fan, the centrifugal fan being for drawing airflow from the casing air inlet into the casing and blowing the heat-exchanged airflow out of the room from the casing air outlet, the centrifugal fan including a hub; and a fan motor. The device includes: a stator base located between the top plate and the hub, and connected to the top plate, the stator base having a second connecting hole; an inner stator connected to the stator base; an outer rotor surrounding the inner stator, the outer rotor being rotatable relative to the inner stator, and the outer rotor being connected to the hub; a third vibration damper disposed within the second connecting hole, the third vibration damper having a third connecting hole inside, and a groove on the outer periphery of the third vibration damper, the wall of the second connecting hole engaging with the groove to create a preset gap between the stator base and the top plate; and a second fastener passing through the second through hole and the third connecting hole to connect the top plate, the third vibration damper, and the stator base to each other.

[0026] Thus, by installing a third vibration damper within the second connection hole of the stator base, the vibration generated during fan motor operation can be effectively absorbed and buffered, reducing the transmission of vibration to the top plate, thereby reducing noise and improving user comfort. Furthermore, the cooperation between the third vibration damper and the second fastener ensures a more stable and reliable connection between the stator base and the top plate. The snap-fit ​​design between the slot and the wall of the second connection hole ensures the positional stability of the third vibration damper, preventing loosening due to vibration. In addition, the snap-fit ​​design between the slot and the wall of the second connection hole creates a preset gap between the stator base and the top plate, preventing large-area contact between them and thus avoiding resonance of the indoor unit caused by such contact. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the indoor unit of the ceiling-mounted air conditioner disclosed in an embodiment of this application;

[0029] Figure 2 This is a side view of the indoor unit of the ceiling-mounted air conditioner disclosed in an embodiment of this application;

[0030] Figure 3 for Figure 2 Sectional view of AA;

[0031] Figure 4 This is a schematic diagram of the centrifugal fan disclosed in the embodiments of this application;

[0032] Figure 5 This is a side view of the centrifugal fan disclosed in an embodiment of this application;

[0033] Figure 6 for Figure 5 Sectional view of BB;

[0034] Figure 7 This is a schematic diagram of the structure of the fan motor disclosed in the embodiments of this application;

[0035] Figure 8 This is a schematic diagram of the fan motor and centrifugal fan after installation, as disclosed in the embodiments of this application, from one perspective.

[0036] Figure 9 This is a schematic diagram of the fan motor and centrifugal fan after installation, as disclosed in an embodiment of this application, from another perspective.

[0037] Figure 10 for Figure 9 A magnified view of a section at point A in the middle;

[0038] Figure 11 This is an exploded view of the fan motor and centrifugal fan after installation, as disclosed in the embodiments of this application.

[0039] Figure 12 This is a schematic diagram of the structure of the first vibration damping component disclosed in the embodiments of this application;

[0040] Figure 13 This is a schematic diagram of the structure of the top plate disclosed in an embodiment of this application;

[0041] Figure 14 This is a schematic diagram of the stator base structure disclosed in the embodiments of this application;

[0042] Figure 15 This is a schematic diagram of the connection between the stator base and the top plate disclosed in an embodiment of this application;

[0043] Figure 16 for Figure 15 Sectional view of CC;

[0044] Figure 17 for Figure 16 A magnified view of a section at point B in the middle;

[0045] Figure 18 This is a schematic diagram of the structure of the third vibration damping component disclosed in the embodiments of this application.

[0046] Explanation of reference numerals in the attached figures:

[0047] 100 - Indoor unit;

[0048] 1-Housing; 1a-Housing cavity; 11-Top plate; 11a-Second through hole; 12-Face panel; 12a-Housing air inlet; 12b-Housing air outlet;

[0049] 2-Heat exchanger;

[0050] 3-Centrifugal fan; 31-Hub; 311-Groove; 3111-Groove bottom wall; 3111a-First connecting hole; 312-Boss;

[0051] 4-Fan motor; 41-Inner stator; 42-Outer rotor; 43-Stator base; 43a-Second connecting hole;

[0052] 5-Connecting structure; 51-Reinforcing member; 51a-First through hole; 52-Connecting protrusion; 53-Reinforcing rib; 54-First fastener; 541-Screw; 542-Nut;

[0053] 6-First damping component; 61-Protrusion;

[0054] 7-Second vibration damper;

[0055] 8-Third vibration damper; 81-Slot; 8a-Third connecting hole;

[0056] 9-Second fastener;

[0057] L - Preset gap. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0060] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0061] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0062] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0063] As people increasingly pursue higher quality indoor environments, air conditioning has become an essential device to meet these needs. Air conditioning, or air conditioner, uses artificial means to regulate and control parameters such as temperature, humidity, and airflow within a building or structure, effectively adjusting indoor air parameters and bringing convenience to daily life.

[0064] Nowadays, with improved living standards and changing aesthetic values, people not only value the basic performance of air conditioners, but also pay attention to their appearance and coordination with interior decoration styles, cost-effectiveness, and aesthetics after installation.

[0065] Ceiling-mounted air conditioners, a type of air conditioner, are typically installed within the ceiling, with the indoor unit concealed and only the supply and return air vents visible in the room. This concealed installation avoids the space-consuming problem of traditional air conditioners, maintaining the overall aesthetics of the interior design. Suitable for various apartment layouts and decorating styles, whether small or large, modern minimalist or classic Chinese, ceiling-mounted units blend seamlessly. Furthermore, they feature multi-directional airflow, allowing for air delivery at different angles to meet the varying temperature and airflow needs of people in different locations. Ceiling-mounted units are also easy to install and maintain, requiring no complex procedures for repairs. Therefore, due to their aesthetic appeal, practicality, and convenience, ceiling-mounted units are becoming an increasingly popular choice for air conditioners.

[0066] The indoor unit of a ceiling-mounted air conditioner is equipped with a centrifugal fan, a fan motor, and a heat exchanger. The fan motor drives the centrifugal fan to rotate, allowing airflow from outside the indoor unit to enter through the air inlet. After airflow from the centrifugal fan and heat exchange in the heat exchanger, the air is then discharged into the room through the air outlet. In related technologies, the fan motor of the ceiling-mounted air conditioner indoor unit is an internal rotor motor, which drives the centrifugal fan. An internal rotor motor is a DC motor with a permanent magnet on the rotor and coils on the stator. The rotor and stator of the internal rotor motor are usually tightly coupled, forming a single unit. The internal rotor motor is driven by electromagnetic induction, which causes significant vibration and noise due to changes in electromagnetic force within the motor. During operation, the rotor temperature rises, and because the rotor is located inside the motor, its heat dissipation performance is poor. Furthermore, the internal rotor motor requires a shaft to connect the internal rotor to the centrifugal fan hub, resulting in a deep groove in the hub. This not only affects the airflow but also increases the material usage of the centrifugal fan. In addition, a large sheet metal part is usually placed on the surface of the wheel hub away from the fan motor to ensure the structural strength of the connection between the fan motor and the wheel hub, resulting in higher production costs.

[0067] Based on this, this application provides a ceiling machine whose fan motor adopts an external rotor motor, and can reduce production costs while ensuring sufficient structural strength at the connection between the fan motor and the hub.

[0068] The present technical solution will be further described below with reference to the embodiments and accompanying drawings.

[0069] Please see Figure 1This application provides a ceiling-mounted air conditioner, which includes an indoor unit 100. The indoor unit 100 is an important component of the ceiling-mounted air conditioner and performs an air conditioning cycle using an air supply system and a related heat exchange system. This cycle encompasses a series of processes, including air intake, heat exchange, airflow propulsion, and temperature regulation, thereby providing a suitable temperature and air quality for the indoor space. A strong airflow is generated by the air supply system to draw indoor air into the ducted air conditioner. The intake air then flows through the heat exchange system to absorb heat from the air, achieving a cooling effect, and transferring the heat to the refrigerant through the heat exchange process. The cooled air, after heat exchange, is then pushed back into the indoor space by the air supply system, forming a cycle. Through this cycle, the indoor space temperature is regulated, and the indoor air quality is improved through airflow circulation, providing users with a comfortable and healthy indoor environment. In this embodiment, the indoor unit 100 is mounted on the ceiling.

[0070] like Figure 2 and Figure 3 As shown, the indoor unit 100 includes a housing 1, and a housing cavity 1a is formed inside the housing 1 to accommodate various components inside the indoor unit 100.

[0071] like Figure 1 and Figure 2 As shown, the housing 1 includes a top plate 11, which is used to mount the indoor unit 100 on the ceiling of the room.

[0072] The housing 1 also includes a panel 12, which is disposed opposite to the top plate 11. The panel 12 has a housing air inlet 12a and a housing air outlet 12b. The housing air inlet 12a is used to guide airflow into the interior of the housing 1, and the housing air outlet 12b is used to guide airflow into the room. In this embodiment, as... Figure 1 As shown, the air outlet 12b of the housing is arranged around the air inlet 12a of the housing, that is, the air inlet 12a of the housing is in the center of the panel 12, and the air outlet 12b of the housing is around the air inlet 12a of the housing.

[0073] It should be noted that the air outlet 12b of the housing can also be arranged in any direction with the air inlet 12a of the housing, and this embodiment does not make specific limitations on this.

[0074] like Figure 3As shown, the indoor unit 100 also includes a heat exchanger 2, which is disposed within the housing cavity 1a. The heat exchanger 2 is used to exchange heat with the flowing air. It utilizes the characteristic that liquid low-temperature refrigerant easily evaporates under low pressure, absorbing heat from the cooled medium to lower the temperature of the surrounding air, thus achieving a cooling effect. The cooled air, after passing through the heat exchanger 2, is returned to the room through the air supply system, providing a comfortable indoor environment. Especially in the hot summer, the cooling effect of the heat exchanger 2 can significantly reduce the indoor temperature and improve people's perceived comfort.

[0075] like Figure 3 and Figure 4 As shown, the indoor unit 100 also includes a centrifugal fan 3, which is disposed within the housing cavity 1a, with its shaft extending vertically. A heat exchanger 2 is arranged around the outer periphery of the centrifugal fan 3. The centrifugal fan 3 draws air into the housing 1 from the housing inlet 12a and blows the heat-exchanged air out of the room from the housing outlet 12b. The centrifugal fan 3 introduces air into the housing 1, and after heat exchange by the indoor heat exchanger 2, the air is then returned to the room by the centrifugal fan 3.

[0076] It should be noted that the vertical direction is Figure 3 The direction from top to bottom or from bottom to top.

[0077] See Figures 4 to 6 The centrifugal fan 3 includes a hub 31, which is the main structure of the centrifugal fan 3. The hub 31 is recessed to the side away from the top plate 11 to form a groove 311. The bottom wall 3111 of the groove 311 is provided with a plurality of first connection holes 3111a.

[0078] like Figure 3 and Figure 7 As shown, the indoor unit 100 also includes a fan motor 4, which drives the centrifugal fan 3 to rotate.

[0079] Combination Figure 7 and Figure 8 The fan motor 4 includes an inner stator 41, which is fixed relative to the top plate 11 and is at least partially located within the groove 311.

[0080] Combination Figure 9 and Figure 10 The fan motor 4 also includes an outer rotor 42, which is arranged around the inner stator 41. The outer rotor 42 can rotate relative to the inner stator 41. The outer rotor 42 is connected to the hub 31 through the connecting structure 5.

[0081] like Figure 10 and Figure 11As shown, the connection structure 5 includes multiple reinforcing members 51. The multiple reinforcing members 51 are disposed on the side of the bottom wall 3111 of the groove 311 away from the fan motor 4. The multiple reinforcing members 51 correspond to multiple first connecting holes 3111a respectively, and each reinforcing member 51 is provided with a first through hole 51a.

[0082] The connection structure 5 also includes a plurality of first fasteners 54, which correspond to a plurality of first connecting holes 3111a respectively. One end of each first fastener 54 is connected to the outer rotor 42, and the other end of each first fastener 54 passes through the first connecting hole 3111a and the first through hole 51a in sequence, and is connected to the reinforcing member 51.

[0083] When the outer rotor 42 drives the centrifugal fan 3 to rotate, the connection between the outer rotor 42 and the hub 31 of the centrifugal fan 3 will be subjected to shearing force due to rotation. When the centrifugal fan 3 rotates at high speed, the hub 31 may be damaged or deformed due to the large shearing force.

[0084] Therefore, by providing a reinforcing member 51 on the side of the groove bottom wall 3111 away from the fan motor 4, when the outer rotor 42 rotates, the shear force transmitted from the outer rotor 42 to the hub 31 is first transferred from the first fastener 54 to the reinforcing member 51, whereby the reinforcing member 51 first bears part of the shear force, and then the shear force is transferred from the reinforcing member 51 to the hub 31. This ensures that the connection between the outer rotor 42 and the hub 31 will not deform or break due to excessive shear force. Furthermore, multiple reinforcing members 51 can be installed individually, making assembly more convenient and faster. This avoids the need to align multiple first through holes 51a with multiple first connecting holes 3111a simultaneously when installing a large reinforcing member 51. At the same time, when manufacturing a large reinforcing member 51, manufacturing tolerances are easily present between the multiple first through holes 51a, thus requiring high manufacturing precision. The present application uses multiple reinforcing members 51, which have lower manufacturing precision requirements, reducing the occurrence of situations where assembly is impossible due to manufacturing tolerances and requiring remanufacturing of the reinforcing member 51, thereby reducing production costs.

[0085] It is worth noting that the fan motor 4 selected in this embodiment is an external rotor motor. Since the rotor of the external rotor motor is located outside the stator, this structure makes it exhibit more stable characteristics when outputting torque, and can provide higher torque, thereby ensuring that the centrifugal fan 3 can provide stronger airflow when running at high speed. In addition, the heat dissipation of the fan motor 4 is more effective, which can extend the service life of the fan motor 4. Furthermore, the external rotor motor is usually quieter than the internal rotor motor during operation, which can further reduce the noise generated by the rotation of the fan motor 4. Moreover, the structure of the external rotor motor is relatively simple and easy to disassemble and assemble, which can reduce the maintenance difficulty of the fan motor 4. At the same time, by using an external rotor motor, there is no need to use a motor shaft to connect to the centrifugal fan 3. The external rotor 42 can be directly connected to the hub 31 of the centrifugal fan 3, which can reduce the depth of the groove 311 formed by the hub, thereby reducing the impact of the groove 311 on the air intake and reducing the amount of material used in the centrifugal fan 3.

[0086] It should be noted that the number of multiple reinforcing members 51 can be two or more, that is, there can be two, three, four or more reinforcing members 51. In this embodiment, the number of reinforcing members 51 is three.

[0087] Among them, the material rigidity of the reinforcing member 51 is greater than that of the wheel hub 31, which means that the deformation resistance of the reinforcing member 51 is greater than that of the wheel hub 31. In other words, the reinforcing member 51 can withstand greater external forces than the wheel hub 31.

[0088] In some embodiments, such as Figure 10 and Figure 11 As shown, the connection structure 5 also includes a plurality of connection protrusions 52. The plurality of connection protrusions 52 are integrally formed on the surface of the bottom wall 3111 of the groove 311 away from the fan motor 4, and correspond to a plurality of first connection holes 3111a respectively. The first connection holes 3111a penetrate the connection protrusions 52. The reinforcing member 51 is disposed at one end of the connection protrusion 52 away from the bottom wall 3111 of the groove 311. The first fastener 54 is configured to press and fix the reinforcing member 51 along the axial direction of the hub 31 to the connection protrusion 52.

[0089] It should be noted that the axial direction of hub 31 is... Figure 6 The direction from bottom to top.

[0090] On the one hand, by integrally forming a connecting protrusion 52 on the surface of the groove bottom wall 3111 away from the fan motor 4, a mounting base is provided for the reinforcement 51, and the structural strength near the first connecting hole 3111a of the groove bottom wall 3111 is strengthened.

[0091] On the other hand, the connecting protrusion 52 and the reinforcing member 51 cooperate to form a stable shear force transmission path, further improving the structural strength near the first connecting hole 3111a on the hub 31. The shear force generated by the rotation of the outer rotor 42 is transmitted to the hub 31 through the first fastener 54, the reinforcing member 51, and the connecting protrusion 52, reducing stress concentration and ensuring the normal rotation of the centrifugal fan 3.

[0092] It should be noted that in this embodiment, the connecting protrusion 52 is cylindrical. Of course, the connecting protrusion 52 can also be frustum-shaped or other shapes. This embodiment does not specifically limit this.

[0093] When the connecting protrusion 52 is cylindrical, the cylindrical connecting protrusion 52 is conducive to the uniform distribution of stress, which can disperse the concentrated stress to a larger area, reduce the stress concentration points, thereby improving the fatigue life of the connecting structure 5, and further enhancing the local strength of the hub 31 at the bottom wall 3111 of the groove 311, so that when the centrifugal fan 3 is running at high speed, it can better resist the stress generated by the airflow impact and its own rotation, and reduce the risk of deformation and damage.

[0094] In this embodiment, the first end face of the reinforcing member 51 abuts against the surface of the end of the connecting protrusion 52 away from the groove bottom wall 3111 of the groove 311, and the area of ​​the first end face of the reinforcing member 51 is adapted to the area of ​​the end of the connecting protrusion 52 away from the groove bottom wall 3111 of the groove 311.

[0095] This avoids the need for the reinforcing member 51 to have an area equal to the area of ​​the bottom wall 3111 of the groove 311 during manufacturing. While ensuring sufficient connection strength between the outer rotor 42 and the hub 31, it reduces the area of ​​the reinforcing member 51 and lowers the cost.

[0096] In some embodiments, such as Figure 10 and Figure 11 As shown, the first fastener 54 includes a screw 541, one end of which is connected to the outer rotor 42, and the other end of which passes through the first connecting hole 3111a and the first through hole 51a in sequence.

[0097] The first fastener 54 also includes a nut 542, which is threaded to the end of the screw 541 away from the outer rotor 42 and abuts against the reinforcement 51 along the extension direction of the screw 541.

[0098] The fastening method of screw 541 and nut 542 is characterized by reliable connection and high strength. Through the cooperation of screw 541 and nut 542, on the one hand, sufficient preload can be provided to ensure a tight connection between the outer rotor 42, hub 31 and reinforcing member 51, thereby improving the stability and reliability of the entire structure. On the other hand, the connection method of screw 541 and nut 542 is convenient for installation and disassembly. During installation, simply pass screw 541 through the first connecting hole 3111a and the first through hole 51a in sequence, and then tighten nut 542. When maintenance or replacement of parts is required, loosening nut 542 can disassemble the parts. The operation is simple and convenient, improving maintenance efficiency.

[0099] It should be noted that, in addition to the screw 541 being connected to the outer rotor 42 as described in the above embodiment, the screw 541 can also be integrally formed with the outer rotor 42. This embodiment does not specifically limit this.

[0100] In some embodiments, the reinforcing member 51 is a reinforcing cover, which is fitted onto one end of the groove bottom wall 3111 of the connecting protrusion 52 away from the groove 311.

[0101] When the reinforcing member 51 is a reinforcing cover, the reinforcing cover is fitted over one end of the connecting protrusion 52, so that the force transmitted from the outer rotor 42 is evenly distributed between the connecting protrusion 52 and the reinforcing cover, avoiding stress concentration. Furthermore, the reinforcing cover on the connecting protrusion 52 provides clear guidance for installation. During installation, simply align the reinforcing cover with the connecting protrusion 52 and fit it in; precise positioning can be achieved, improving installation efficiency and avoiding connection problems caused by positional deviations.

[0102] It should be noted that the reinforcing member 51 can be the reinforcing cover described in the above embodiments, or it can be a reinforcing ring or a reinforcing sleeve. The reinforcing ring can provide good axial and radial support and enhance the stability of the connection; the reinforcing sleeve can provide a longer connection length, enhance the reliability of the connection, and also facilitate disassembly and maintenance.

[0103] In some embodiments, such as Figure 10 and Figure 11 As shown, the connecting structure 5 also includes a plurality of reinforcing ribs 53, which are distributed circumferentially along the connecting protrusion 52. Each reinforcing rib 53 includes an adjacent first side and a second side. The first side is connected to the outer peripheral wall of the connecting protrusion 52, and the second side is connected to the bottom wall 3111 of the groove 311, which is away from the surface of the fan motor 4.

[0104] Thus, by setting the reinforcing rib 53, the local strength and rigidity of the hub 31 at the bottom wall 3111 of the groove 311 can be further enhanced. When the centrifugal fan 3 is running at high speed, the reinforcing rib 53 can help the hub 31 better resist the stress generated by airflow impact and its own rotation, reducing the risk of deformation and damage. Furthermore, the reinforcing rib 53 can more evenly transfer the stress on the connecting protrusion 52 to the bottom wall 3111 of the groove 311, avoiding stress concentration. In addition, the reinforcing rib 53 connects the connecting protrusion 52 and the bottom wall 3111 of the groove 311 through the first and second sides, making the entire connection structure 5 more stable.

[0105] In some embodiments, the reinforcing member 51 is a sheet metal part. This allows the reinforcing member 51 to achieve a relatively light weight while ensuring sufficient strength and rigidity. Furthermore, sheet metal parts have relatively low raw material costs, and sheet metal processing technology is mature and highly efficient, enabling large-scale mass production and thus reducing production costs.

[0106] In some embodiments, such as Figure 11 As shown, the indoor unit 100 also includes a first vibration damping member 6, which is disposed between the outer rotor 42 and the bottom wall 3111 of the groove 311. By disposing of the first vibration damping member 6 between the outer rotor 42 and the bottom wall 3111 of the groove 311, the vibration generated during the operation of the outer rotor 42 can be effectively absorbed and isolated, reducing the vibration transmitted to the hub 31 and the casing 1, thereby reducing the overall noise level of the indoor unit 100 and improving user comfort.

[0107] It is worth noting that the first damping element 6 can be a rubber pad, polyurethane, shockproof steel plate or other materials that can absorb vibration, and this embodiment does not limit this.

[0108] For example, when the first damping element 6 is a rubber pad, the high elasticity of the rubber material effectively absorbs and disperses the vibration energy generated by the outer rotor 42 during operation, thereby reducing the vibration of the fan motor 4 during operation. Furthermore, the rubber material has good impact resistance, maintaining its shape and performance stability under external impact, further protecting the hub 31 from damage. In addition, the damping performance of the rubber pad effectively reduces vibration transmission, thereby reducing noise generated by vibration. The softness and plasticity of the rubber pad allow it to fit tightly against the gap between the outer rotor 42 and the groove bottom wall 3111 of the groove 311, reducing noise leakage.

[0109] In some embodiments, such as Figure 4 As shown, the hub 31 includes a plurality of bosses 312, which are disposed on the surface of the bottom wall 3111 of the groove 311 near the outer rotor 42, and the plurality of bosses 312 correspond to the plurality of connecting protrusions 52 in the vertical direction.

[0110] like Figure 11 and Figure 12 As shown, there are multiple first damping elements 6, which are sleeved on the outer periphery of the boss 312. The surface of the first damping element 6 facing the outer rotor 42 is provided with multiple protrusions 61, and the protrusions 61 abut against the outer rotor 42 in the vertical direction Z.

[0111] On the one hand, the multiple protrusions 312 provided on the surface of the groove bottom wall 3111 near the outer rotor 42 can disperse the stress transmitted from the outer rotor 42, avoid stress concentration, and reduce the risk of deformation and damage to the hub 31 due to stress concentration during high-speed operation. Furthermore, the protrusions 312 provide a base for the first damping member 6, making its installation more convenient; the first damping member 6 can simply be fitted onto the protrusions 312. It is also easy to disassemble and replace during maintenance.

[0112] On the other hand, the multiple protrusions 61 on the surface of the first damping member 6 facing the outer rotor 42 increase the contact area between the first damping member 6 and the outer rotor 42, making the damping effect more significant, and also helping to distribute the force more evenly and reduce local stress concentration.

[0113] It should be noted that there can be two or more first damping elements 6, and there can be two or more protrusions 61 on the first damping elements 6. This embodiment does not impose specific limitations on this. Figure 11 and Figure 12 As shown, there are three first damping elements 6, and four protrusions 61 on the first damping elements 6.

[0114] In some embodiments, such as Figure 11 As shown, the indoor unit 100 also includes a second vibration damping member 7, which is disposed between the connecting protrusion 52 and the reinforcing member 51. By providing the second vibration damping member 7 between the connecting protrusion 52 and the reinforcing member 51, the vibration generated during the operation of the outer rotor 42 can be further absorbed and buffered, reducing the transmission of vibration to the hub 31 and the casing 1, thereby reducing noise and improving the service life of components. Furthermore, the second vibration damping member 7 can absorb minor displacements and impacts during operation, making the connection between the connecting protrusion 52 and the reinforcing member 51 more stable, reducing loosening of the connection due to vibration, and ensuring the normal operation of the centrifugal fan 3.

[0115] It should be noted that the second damping element 7 is similar to the first damping element 6, and can be a rubber pad, polyurethane, shockproof steel plate or other materials that can absorb vibration. This embodiment does not make specific limitations on this.

[0116] In some embodiments, such as Figure 13As shown, the top plate 11 is provided with a second through hole 11a, and the fan motor 4 also includes a stator base 43, which is located between the top plate 11 and the hub 31. The stator base 43 is provided with a second connecting hole 43a (as shown). Figure 14 As shown), the inner stator 41 is connected to the stator base 43, and the inner stator 41 is connected to the top plate 11 through the stator base 43 (as shown). Figure 15 and Figure 16 (As shown).

[0117] Combination Figure 14 and Figure 17 The indoor unit 100 also includes a third vibration damping component 8, which is disposed within the second connecting hole 43a, in conjunction with... Figure 17 and Figure 18 The third vibration damper 8 has a third connecting hole 8a inside and a slot 81 on the periphery of the third vibration damper 8. The hole wall of the second connecting hole 43a is engaged with the slot 81 so that there is a preset gap L between the stator base 43 and the top plate 11.

[0118] The indoor unit 100 also includes a second fastener 9, which is disposed through a second through hole 11a and a third connecting hole 8a to connect the top plate 11, the third damping member 8 and the stator base 43 to each other.

[0119] On the one hand, by setting a third vibration damper 8 in the second connection hole 43a of the stator base 43, the vibration generated when the fan motor 4 is running can be effectively absorbed and buffered, reducing the vibration transmitted to the top plate 11, thereby reducing noise and improving the user's comfort.

[0120] On the other hand, through the cooperation of the third damping component 8 and the second fastener 9, the connection between the stator base 43 and the top plate 11 is more stable and reliable. The snap-fit ​​design between the slot 81 and the wall of the second connecting hole 43a ensures the positional stability of the third damping component 8 and avoids loosening of the connection due to vibration.

[0121] In addition, the snap-fit ​​design between the slot 81 and the wall of the second connecting hole 43a ensures that there is a preset gap L between the stator base 43 and the top plate 11. This ensures that there will be no large-area contact between the stator base 43 and the top plate 11, thereby avoiding resonance of the indoor unit 100 caused by large-area contact between the stator base 43 and the top plate 11.

[0122] In this embodiment, the second fastener 9 is a bolt and a nut. After the bolt passes through the second through hole 11a of the top plate 11 and the third connecting hole 8a of the third damping member 8 in sequence, the nut is screwed onto the bolt, thereby realizing the connection between the stator base 43 and the top plate 11.

[0123] The following is a brief description of the assembly process between the fan motor 4 and the centrifugal fan 3 in this scheme:

[0124] First, the third damping component 8 is installed into the second connecting hole 43a of the stator base 43, and the stator base 43 is connected to the top plate 11 by the second fastener 9 to achieve the overall positioning of the fan motor 4.

[0125] Then, the first damping member 6 is snapped onto the boss 312 on the surface of the bottom wall 3111 of the groove 311 near the outer rotor 42, and the connecting protrusion 52 is aligned with the screw 541 on the outer rotor 42, and the screw 541 is passed through the connecting protrusion 52.

[0126] Secondly, the second damping member 7 is placed on the first end face of the reinforcing member 51 near the connecting protrusion 52, and the reinforcing member 51 together with the second damping member 7 is sleeved on the screw 541, so that the first end face of the reinforcing member 51 and the second damping member 7 abut against the surface of the connecting protrusion 52 away from the hub 31.

[0127] Finally, tighten nut 542 onto screw 541 to complete the connection between fan motor 4 and hub 31 of centrifugal fan 3.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pinball machine characterized by, include: Indoor unit, the indoor unit includes: A housing, wherein a housing receiving cavity is formed within the housing, the housing comprising: A top panel, which is used to connect to the interior ceiling; A panel is provided opposite to the top plate, and the panel is provided with an air inlet and an air outlet for the housing. A heat exchanger, wherein the heat exchanger is disposed within the housing cavity; A centrifugal fan is disposed within the housing cavity, and the fan shaft extends vertically. A heat exchanger is disposed around the outer periphery of the centrifugal fan. The centrifugal fan is used to draw airflow into the housing from the housing inlet and blow the heat-exchanged airflow out of the housing outlet. The centrifugal fan includes: The hub is recessed to the side opposite to the top plate to form a groove, and the bottom wall of the groove is provided with a plurality of first connection holes; Fan motor, the fan motor comprising: An inner stator, which is fixed relative to the top plate and is at least partially located within the groove; An outer rotor is arranged around the inner stator and can rotate relative to the inner stator. The outer rotor is connected to the hub through a connecting structure. The connection structure includes: Multiple reinforcing members are disposed on the bottom wall of the groove away from the fan motor. Each of the multiple reinforcing members corresponds to a multiple of the first connecting holes, and each of the reinforcing members is provided with a first through hole. Multiple first fasteners are provided, each corresponding to a multiple first connecting hole. One end of each first fastener is connected to the outer rotor, and the other end of each first fastener passes through the first connecting hole and the first through hole in sequence, and is connected to the reinforcing member.

2. The ceiling machine of claim 1, wherein, The connection structure further includes: Multiple connecting protrusions are integrally formed on the bottom wall of the groove, facing away from the surface of the fan motor, and each of the multiple first connecting holes corresponds to the first connecting holes, which penetrate the connecting protrusions. The reinforcing member is disposed at one end of the connecting protrusion away from the bottom wall of the groove, and the first fastener is configured to press and fix the reinforcing member to the connecting protrusion along the axial direction of the hub.

3. The ceiling machine according to claim 2, characterized in that, The first fastener includes: A screw, one end of which is connected to the outer rotor, and the other end of which passes through the first connecting hole and the first through hole in sequence; A nut is threaded to the end of the screw away from the outer rotor and abuts against the reinforcing member along the extension direction of the screw.

4. The ceiling machine of claim 2, wherein, The reinforcing member is a reinforcing cover, which is fitted onto one end of the connecting protrusion away from the bottom wall of the groove.

5. The ceiling machine of claim 2, wherein, The connection structure also includes: Multiple reinforcing ribs are distributed circumferentially along the connecting protrusion. Each reinforcing rib includes an adjacent first side and a second side. The first side is connected to the outer peripheral wall of the connecting protrusion, and the second side is connected to the bottom wall of the groove, away from the surface of the fan motor.

6. The ceiling machine of claim 1, wherein, The reinforcing component is a sheet metal part.

7. The ceiling tile of claim 2, wherein, The indoor unit also includes: The first vibration damping component is disposed between the outer rotor and the bottom wall of the groove.

8. The ceiling system of claim 7, wherein, The wheel hub includes: Multiple bosses are disposed on the bottom wall of the groove near the surface of the outer rotor, and the multiple bosses correspond to the multiple connecting protrusions in the vertical direction. There are multiple first damping components. The first damping component is sleeved on the outer periphery of the boss. The surface of the first damping component facing the outer rotor has multiple protrusions, and the protrusions abut against the outer rotor in the vertical direction.

9. The ceiling tile of claim 2, wherein, The indoor unit also includes: The second damping member is disposed between the connecting protrusion and the reinforcing member.

10. A tile machine, characterized in that, include: Indoor unit, the indoor unit includes: A housing, wherein a housing receiving cavity is formed within the housing, the housing comprising: A top plate, which is used to connect to the ceiling of the room, and the top plate is provided with a second through hole; A panel is provided opposite to the top plate, and the panel is provided with an air inlet and an air outlet for the housing. A heat exchanger, wherein the heat exchanger is disposed within the housing cavity; A centrifugal fan is disposed within the housing cavity, and the shaft of the centrifugal fan extends vertically. A heat exchanger is disposed around the outer periphery of the centrifugal fan. The centrifugal fan is used to draw airflow into the housing from the housing inlet and blow the heat-exchanged airflow out of the room from the housing outlet. The centrifugal fan includes a hub. Fan motor, the fan motor comprising: A stator base is located between the top plate and the hub and is connected to the top plate. The stator base is provided with a second connecting hole. An inner stator, the inner stator being connected to the stator base; An outer rotor is arranged around the inner stator and is rotatable relative to the inner stator. The outer rotor is connected to the hub. The third vibration damper is disposed in the second connecting hole. The third vibration damper has a third connecting hole inside and a groove on its outer periphery. The hole wall of the second connecting hole is engaged in the groove so that there is a preset gap between the stator base and the top plate. A second fastener is provided, passing through the second through hole and the third connecting hole, to connect the top plate, the third damping member, and the stator base to each other.

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