Air conditioner indoor unit

Abstract

This application relates to the field of air conditioning technology, and more particularly to an indoor air conditioning unit. The indoor air conditioning unit includes: a housing with an air inlet and an air outlet; a fan disposed within the housing for drawing air from outside the housing into the housing through the air inlet and discharging it into the room through the air outlet; the fan includes: a motor, including: a stator; an outer rotor rotatably mounted outside the stator to rotate under the drive of the stator; an impeller, including: a guide ring defining an inlet for air to flow into the impeller; a chassis located on one side of the guide ring along its own axial direction, and the chassis being spaced apart from the guide ring; and multiple blades connected between the chassis and the guide ring, the blades being spaced apart circumferentially along the guide ring, with an outlet for air to flow out of the impeller formed between adjacent blades; the blades are separately disposed from the chassis and the guide ring, while the chassis and the outer rotor are integrally formed. This improves the efficiency of air conditioning using the indoor air conditioning unit of this application.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an indoor 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 rate of the air inside a building or structure.

[0003] Built-in air conditioners and other types of air conditioners all use fans, which consist of a motor and an impeller. The motor drives the impeller to rotate, thereby transporting air. However, current built-in air conditioners are inefficient. Utility Model Content

[0004] This application discloses an indoor air conditioning unit that can improve the efficiency of air conditioning systems using the indoor air conditioning unit of this application.

[0005] To achieve the above objectives, this application discloses an indoor air conditioning unit, comprising: A housing, wherein an air inlet and an air outlet are provided on the housing; A fan, disposed within the housing, is used to draw air from outside the housing into the housing through the air inlet and exhaust it into the room through the air outlet. The fan includes: Electric motor, including: stator; An outer rotor is rotatably mounted outside the stator to rotate under the drive of the stator; Impeller, including: A guide ring defines the inlet for air to flow into the impeller; The chassis is located on one side of the guide ring along its own axial direction, and the chassis is separated from the guide ring. Multiple blades are connected between the chassis and the guide ring. The multiple blades are distributed at circumferential intervals along the guide ring, and an outlet for air to flow out of the impeller is formed between two adjacent blades. The blades are separately disposed from the chassis and the guide ring, and the chassis and the outer rotor are integrally formed.

[0006] In this application, the fan includes a motor and an impeller. The motor includes a stator and an outer rotor, and the impeller includes a guide ring, a chassis and multiple blades. The chassis and the outer rotor are integrally formed, so there is no need to assemble and connect the chassis and the outer rotor, thereby simplifying the assembly process of the fan.

[0007] Furthermore, the blades are separately set from the chassis and the guide ring, meaning that the blades, chassis, and guide ring are formed separately. In this way, when forming the blades, the chassis, guide ring, and other blades will not obstruct the mold used to form the blades from ejecting. The mold can eject from the direction perpendicular to the blade surface. Thus, the blade surface itself can be designed into any shape without hindering the mold ejection, thereby allowing the blade surface to be designed in the optimal shape to improve the impeller's air delivery effect, improve the efficiency of the air conditioning indoor unit, and thus improve the efficiency of the air conditioning unit using the air conditioning indoor unit of this application.

[0008] In one alternative embodiment, the chassis includes: A disk body is located between the outer rotor and the blades, with the outer rotor disposed on the disk body; A first limiting part is provided on the side of the disc body facing the outer rotor. The first limiting part is arranged around the outer rotor and contacts the outer peripheral surface of the outer rotor to stop and limit the outer rotor in the radial direction of the outer rotor.

[0009] In this embodiment, the chassis includes a chassis body and a first limiting part. The first limiting part is disposed on the chassis body and surrounds the outer rotor. The first limiting part contacts the outer peripheral surface of the outer rotor to prevent the outer rotor from moving radially, preventing the formation of a gap between the outer rotor and the chassis, and preventing the outer rotor from radially disengaging from a preset position. This helps maintain the dynamic balance of the fan. Furthermore, by providing the first limiting part on the chassis body, the outer rotor is connected not only to the chassis body but also to the first limiting part. This increases the connection area between the outer rotor and the chassis, thereby ensuring the reliability of the connection between the outer rotor and the chassis.

[0010] In one optional embodiment, the protrusion height of the first limiting portion is 10~30mm along the arrangement direction of the disc and the outer rotor.

[0011] If the protrusion height of the first limiting part is less than 10mm, the first limiting part has a small protrusion height, and its effect on radial limiting of the outer rotor is limited, as is its effect on maintaining aerodynamic balance. Furthermore, the contact area between the first limiting part and the outer rotor is limited, resulting in a small improvement in the connection reliability between the outer rotor and the chassis. If the protrusion height of the first limiting part is greater than 30mm, the first limiting part has a large protrusion height, and the greater the height of the injection molded part, the higher the injection molding difficulty, which increases the difficulty of integrally molding the chassis and the outer rotor.

[0012] Therefore, in this embodiment, the protrusion height of the first limiting part is controlled within 10~30mm, which can ensure that the protrusion height of the first limiting part is within a suitable range. This not only ensures the radial limiting effect of the first limiting part on the outer rotor and ensures that the first limiting part and the outer rotor have a large contact area, thus greatly improving the reliability of the connection between the outer rotor and the chassis, but also reduces the difficulty of integral molding of the chassis and the outer rotor.

[0013] In an optional embodiment, the chassis further includes: The second limiting part is provided on the side of the disk body facing the outer rotor, and a limiting groove is formed between the second limiting part and the disk body; A portion of the outer rotor is located within the limiting groove, so that the second limiting part stops and limits the outer rotor in the direction from the disc body to the outer rotor.

[0014] In this embodiment, a second limiting part is provided on the side of the disc facing the outer rotor. The second limiting part cooperates with the disc to form a limiting groove. A part of the outer rotor is located in the limiting groove and cooperates with the second limiting part, so that the second limiting part stops and limits the outer rotor in the direction from the disc to the outer rotor. This can prevent the outer rotor from separating from the chassis axially and ensure the reliability of the connection between the outer rotor and the chassis. In addition to the disc and the first limiting part connecting the chassis to the outer rotor, the second limiting part of the chassis is also connected to the outer rotor. This can further increase the connection area between the chassis and the outer rotor, so as to further improve the reliability of the connection between the chassis and the outer rotor.

[0015] In an optional embodiment, the motor further includes: The support shaft is integrally formed with the stator; The outer rotor is provided with a rotating hole, and the support shaft passes through the rotating hole so that the outer rotor can rotate around the support shaft.

[0016] In this embodiment, the support shaft and stator are integrally formed, not integrally formed with the outer rotor. The support shaft does not participate in rotation; only the outer rotor and impeller rotate. In other words, the rotating components of the fan are the impeller and the outer rotor. Compared to embodiments where the support shaft and outer rotor are integrally formed, this embodiment reduces the total mass of the rotating components. This reduces rotational inertia, allowing the fan to start, stop, and change speed more quickly. Furthermore, lower rotational inertia allows the motor to consume less energy during acceleration and deceleration, contributing to the overall energy efficiency of the fan.

[0017] In an optional embodiment, the motor further includes: An elastic element is disposed between the outer rotor and the stator to apply a restoring force to the outer rotor along the axial direction of the support shaft.

[0018] In this embodiment, an elastic element is provided between the outer rotor and the stator. During the axial movement of the rotating component, the elastic element will undergo elastic deformation. In this way, the elastic element will apply a restoring force to the outer rotor, thereby resisting the axial movement of the rotating component and allowing the rotating component to move within a small axial range. This reduces the risk of the rotating component colliding with hard components, thereby reducing the risk of wear on the rotating component and the risk of generating impact noise.

[0019] In one alternative embodiment, the blade comprises: First blade section; The second blade portion engages with the first blade portion along the thickness direction of the blade to form a hollow cavity between the second blade portion and the first blade portion.

[0020] In this embodiment, the blade includes a first blade section and a second blade section, with a hollow cavity formed between the first blade section and the second blade section. That is, the blade in this embodiment is a hollow blade. Hollow blades have a smaller mass, which allows the rotating components to have a smaller overall mass, reducing the rotational inertia of the rotating components and enabling the fan to start, stop, and change speed more quickly. Furthermore, lower rotational inertia allows the motor to consume less energy during acceleration and deceleration, contributing to the overall energy efficiency of the fan.

[0021] In one alternative embodiment, the edge of the first blade portion is formed with a first flange extending toward the second blade portion, the first flange being disposed around the second blade portion and connected to the second blade portion.

[0022] In this embodiment, the edge of the first blade portion is formed with a first flange surrounding the second blade portion. The first flange is connected to the second blade portion. In this way, the first blade portion can be connected to the second blade portion not only through the blade surface of the first blade portion, but also through the first flange. This can increase the connection area between the first blade portion and the second blade portion, thereby improving the connection stability between the first blade portion and the second blade portion and preventing the first blade portion from detaching from the second blade portion.

[0023] In one alternative embodiment, the edge of the second blade portion is formed with a second flange extending toward the first blade portion, and the first flange is disposed around the second flange and connected to the second flange.

[0024] In this embodiment, the edge of the second blade portion is formed with a second flange surrounding the first flange, and the second flange is connected to the first flange. In this way, the second blade portion can not only be connected to the first blade portion through the blade surface of the second blade portion, but also be connected to the first flange of the first blade portion through the second flange. This can increase the connection area between the first blade portion and the second blade portion, thereby improving the connection stability between the first blade portion and the second blade portion and preventing the first blade portion and the second blade portion from detaching from the connection.

[0025] In one optional embodiment, the blade has a first blade surface and a second blade surface distributed along its own thickness direction, both of which are curved surfaces.

[0026] In this embodiment, both the first and second blade surfaces are curved, which helps to disperse the centrifugal force generated when the blade rotates at high speed, making the blade more robust and less prone to breakage or deformation. Furthermore, the curved design guides airflow to adhere more evenly to the blade surface, reducing turbulence and eddies, thereby lowering noise and vibration. Of course, one of the first and second blade surfaces can be planar and the other curved; alternatively, both the first and second blade surfaces can be planar.

[0027] And / or, in an optional embodiment, the air conditioner indoor unit is an embedded air conditioner indoor unit, and the embedded air conditioner indoor unit further includes: An indoor heat exchanger is disposed inside the housing and arranged around the fan, with the outlet of the indoor heat exchanger opposite to that of the impeller; The fan is used to introduce indoor air into the housing through the air inlet to exchange heat with the indoor heat exchanger, and to discharge the heat-exchanged air into the room through the air outlet.

[0028] In this embodiment, the indoor heat exchanger is arranged around the fan, with the outlet of the indoor heat exchanger facing the outlet of the impeller. When the impeller is working, it draws in air axially and then ejects it radially at high speed and evenly from its entire circumference. Because the indoor heat exchanger is arranged around and directly opposite the outlet of the impeller, this high-speed airflow can simultaneously and evenly pass over all the fin surfaces of the indoor heat exchanger, maximizing the utilization of the heat exchanger's surface area, avoiding uneven local heat exchange, and ensuring a very thorough and efficient heat exchange between the refrigerant and the air, thus improving the energy efficiency ratio of the indoor air conditioning unit. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the structure of an air conditioner indoor unit disclosed in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the fan disclosed in the embodiments of this application; Figure 3 This is a cross-sectional view of the fan disclosed in the embodiments of this application, and enlarged schematic diagrams of points A and B therein; Figure 4 For this application Figure 3 Enlarged view of point C in the middle; Figure 5 This is a schematic diagram of the impeller and outer rotor disclosed in the embodiments of this application; Figure 6 This is a schematic diagram of the blade structure disclosed in an embodiment of this application; Figure 7 This is an exploded schematic diagram of the blade disclosed in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures: 100. Housing; 101. Air inlet; 102. Air outlet; 200, Fan; 201, Limiting groove; 202, Rotating hole; 203, Hollow cavity; 210, Motor; 211, Stator; 212, Outer rotor; 2121, Cylindrical part; 2122, Embedded part; 220, Impeller; 221, Guide ring; 222, Chassis; 2221, Disc; 2222, First limiting part; 2223, Second limiting part; 223, Blade; 2231, First blade part; 2232, Second blade part; 2233, First flange; 2234, Second flange; 230, Support shaft; 240, Elastic element. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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 rate of the air inside a building or structure.

[0038] Air conditioners, such as built-in air conditioners, use fans. A fan consists of a motor and an impeller. The motor drives the impeller to rotate, thereby transporting air.

[0039] The inventors discovered that the motor in the related technology includes a stator and an outer rotor, and the impeller includes a guide ring, multiple blades, and a chassis. The guide ring, multiple blades, chassis, and outer rotor are integrally formed. When the guide ring, multiple blades, chassis, and outer rotor are integrally formed, the chassis, guide ring, and other adjacent blades will obstruct the mold used to form the blades from ejecting, causing the mold to eject only along the radial direction of the impeller. When the mold ejects along the radial direction of the impeller, the blade surface itself will also obstruct the mold ejection. In order to ensure that the mold can eject smoothly, the blade surface shape needs to adapt to the ejection direction. This will cause the blade surface shape to be unable to be designed according to the optimal shape, thereby weakening the impeller's air delivery effect and resulting in low efficiency of the embedded air conditioner.

[0040] This application discloses an air conditioner indoor unit that can improve the efficiency of air conditioners using this indoor unit. The air conditioner indoor unit provided in this application will be described in detail below with reference to the accompanying drawings and specific embodiments and application scenarios.

[0041] like Figures 1 to 3As shown in the illustration, this application discloses an air conditioner indoor unit. Exemplarily, the air conditioner indoor unit can be a wall-mounted unit, a floor-standing unit, or a built-in unit, etc. This application does not limit the type of air conditioner indoor unit. The air conditioner indoor unit includes: The housing 100 has an air inlet 101 and an air outlet 102. For example, the air inlet 101 can be a heat exchange air inlet, a fresh air inlet, a circulating air inlet, etc., and correspondingly, the air outlet 102 can also be a heat exchange air outlet, a fresh air outlet, a circulating air outlet, etc. The fan 200 mentioned below can be a heat exchange fan, a fresh air fan, a circulating fan, etc. This application does not limit the types of air inlet 101, air outlet 102, and fan 200 mentioned below.

[0042] A fan 200, disposed within the housing 100, is used to draw air from outside the housing 100 into the housing 100 through the air inlet 101 and exhaust it into the room through the air outlet 102. The fan 200 includes: Motor 210, including: Stator 211. Specifically, stator 211 may include a magnetic drive assembly, which includes an iron core and windings. The windings are wound around the iron core. The magnetic drive assembly is used to drive the outer rotor 212 of motor 210 to rotate. The magnetic drive assembly may be formed as an insert within stator 211.

[0043] The outer rotor 212 is rotatably mounted outside the stator 211 to rotate under the drive of the stator 211. Specifically, the outer rotor 212 may include a magnet, which cooperates with a magnetic drive assembly to enable the stator 211 to drive the outer rotor 212 to rotate; the magnet may be formed as an insert within the outer rotor 212.

[0044] Impeller 220 includes: The guide ring 221 defines the inlet for air to flow into the impeller 220. The inlet on the guide ring 221 is used to allow air to flow into the impeller 220.

[0045] The chassis 222 is located on one side of the guide ring 221 along its own axis, and the chassis 222 is separated from the guide ring 221. A fluid space is formed between the chassis 222 and the guide ring 221. Air entering the impeller 220 from the inlet of the guide ring 221 will enter the fluid space.

[0046] Multiple blades 223 are connected between the chassis 222 and the guide ring 221. The multiple blades 223 are distributed circumferentially along the guide ring 221, and an outlet for air to flow out of the impeller 220 is formed between two adjacent blades 223.

[0047] Specifically, during the rotation of the impeller 220, a negative pressure is formed in the fluid space between the chassis 222 and the guide ring 221, thereby drawing air into the fluid space from the inlet of the impeller 220, and then discharging it from the outlet of the impeller 220 under the action of centrifugal force, so as to enter the indoor space from the air outlet 102.

[0048] The blades 223 are separately set from the chassis 222 and the guide ring 221, while the chassis 222 and the outer rotor 212 are integrally formed.

[0049] It should be noted that the chassis 222 and the outer rotor 212 can be injection molded in one step, meaning that the chassis 222 and the outer rotor 212 are formed simultaneously; alternatively, the outer rotor 212 can be injection molded first, and then integrally formed with the chassis 222 as an insert. For example, after the blades 223, chassis 222, and guide ring 221 are formed separately, they can be connected by ultrasonic welding, hot melt welding, or other methods.

[0050] In this application, the fan 200 includes a motor 210 and an impeller 220. The motor 210 includes a stator 211 and an outer rotor 212. The impeller 220 includes a guide ring 221, a chassis 222 and multiple blades 223. The chassis 222 and the outer rotor 212 are integrally formed, so there is no need to assemble and connect the chassis 222 and the outer rotor 212, thereby simplifying the assembly process of the fan 200.

[0051] Furthermore, the blades 223 are separately disposed from the chassis 222 and the guide ring 221. That is to say, the blades 223, the chassis 222, and the guide ring 221 are formed separately. In this way, when forming the blades 223, the chassis 222, the guide ring 221, and the other blades 223 will not obstruct the mold for forming the blades 223. The mold can be ejected from the direction perpendicular to the blade surface of the blades 223. Thus, the blade surface of the blades 223 can be designed into any shape without obstructing the mold ejection. This allows the blade surface to be designed in the optimal shape to improve the air delivery effect of the impeller 220, improve the efficiency of the air conditioning indoor unit, and thus improve the efficiency of the air conditioning indoor unit using the present application.

[0052] Please see Figure 5 In one alternative embodiment, chassis 222 includes: The disk body 2221 is located between the outer rotor 212 and the blade 223, with the outer rotor 212 located on the disk body 2221.

[0053] The first limiting part 2222 is provided on the side of the disc body 2221 facing the outer rotor 212. The first limiting part 2222 is arranged around the outer rotor 212. The first limiting part 2222 contacts the outer peripheral surface of the outer rotor 212 to stop and limit the outer rotor 212 in the radial direction of the outer rotor 212.

[0054] For example, the first limiting part 2222 may be annular or arc-shaped, or the first limiting part 2222 may include a plurality of protrusions distributed circumferentially along the outer rotor 212. This application does not limit the specific structure of the first limiting part 2222.

[0055] In this embodiment, the chassis 222 includes a chassis body 2221 and a first limiting part 2222. The first limiting part 2222 is disposed on the chassis body 2221 and surrounds the outer rotor 212. The first limiting part 2222 contacts the outer peripheral surface of the outer rotor 212 to prevent the outer rotor 212 from moving radially, preventing the formation of a gap between the outer rotor 212 and the chassis 222, and preventing the outer rotor 212 from radially disengaging from a preset position. This helps maintain the dynamic balance of the fan 200. Furthermore, after the first limiting part 2222 is provided on the chassis body 2221, the outer rotor 212 is connected not only to the chassis body 2221 but also to the first limiting part 2222. This increases the connection area between the outer rotor 212 and the chassis 222, thereby ensuring the reliability of the connection between the outer rotor 212 and the chassis 222.

[0056] In some embodiments, the disc 2221 is partially recessed in the direction away from the outer rotor 212 to form a groove, and at least a portion of the outer rotor 212 is located in the groove to reduce the axial dimension of the fan 200. Of course, the disc 2221 may also be flat, that is, the disc 2221 may not form the above-mentioned groove, and this application does not limit this.

[0057] In one optional embodiment, the protrusion height of the first limiting portion 2222 is 10~30mm along the arrangement direction of the disc body 2221 and the outer rotor 212. For example, the protrusion height of the first limiting portion 2222 can be 11mm, 15mm, 18mm, 23mm, 26mm, 29mm, etc., and this application does not limit the protrusion height of the first limiting portion 2222.

[0058] If the protrusion height of the first limiting part 2222 is less than 10mm, the protrusion height of the first limiting part 2222 is relatively small, and the effect of the first limiting part 2222 on radial limiting of the outer rotor 212 is limited, the effect on maintaining the dynamic balance of the fan 200 is limited, and the contact area between the first limiting part 2222 and the outer rotor 212 is limited, thus the degree to which the connection reliability between the outer rotor 212 and the chassis 222 is improved is small. If the protrusion height of the first limiting part 2222 is greater than 30mm, the protrusion height of the first limiting part 2222 is relatively large, the greater the height of the injection molded part, the higher the injection molding difficulty, which will increase the difficulty of integral molding of the chassis 222 and the outer rotor 212.

[0059] Therefore, in this embodiment, the protrusion height of the first limiting part 2222 is controlled within 10~30mm. This ensures that the protrusion height of the first limiting part 2222 is within a suitable range, which not only guarantees the radial limiting effect of the first limiting part 2222 on the outer rotor 212 and ensures a large contact area between the first limiting part 2222 and the outer rotor 212, thus greatly improving the reliability of the connection between the outer rotor 212 and the chassis 222, but also reduces the difficulty of integrally molding the chassis 222 and the outer rotor 212. Of course, the protrusion height of the first limiting part 2222 can also be less than 10mm or greater than 30mm, and this application does not impose any limitations on this.

[0060] Please see Figure 3 and Figure 5 In an optional embodiment, chassis 222 further includes: The second limiting part 2223 is provided on the side of the disc body 2221 facing the outer rotor 212, and a limiting groove 201 is formed between the second limiting part 2223 and the disc body 2221.

[0061] For example, the cross-sectional shape of the second limiting part 2223 may be T-shaped, L-shaped or other shapes, and no restriction is imposed on it.

[0062] A portion of the outer rotor 212 is located within the limiting groove 201, so that the second limiting part 2223 points towards the outer rotor 212 along the direction of the disk body 2221. Figure 3 (The direction indicated by the arrow in the middle) Stop limit.

[0063] In this embodiment, a second limiting part 2223 is provided on the side of the disk 2221 facing the outer rotor 212. The second limiting part 2223 cooperates with the disk 2221 to form a limiting groove 201. A part of the outer rotor 212 is located in the limiting groove 201 and cooperates with the second limiting part 2223, so that the second limiting part 2223 stops and limits the outer rotor 212 in the direction from the disk 2221 to the outer rotor 212. This can prevent the outer rotor 212 from separating from the chassis 222 axially, ensuring the reliability of the connection between the outer rotor 212 and the chassis 222. In addition to the disk 2221 and the first limiting part 2222 connecting with the outer rotor 212, the second limiting part 2223 of the chassis 222 is also connected to the outer rotor 212. This can further increase the connection area between the chassis 222 and the outer rotor 212, thereby further improving the reliability of the connection between the chassis 222 and the outer rotor 212.

[0064] In some embodiments, the motor 210 further includes a support shaft 230. The chassis 222, the outer rotor 212, and the support shaft 230 can be integrally formed. The stator 211 is provided with a rotation hole 202, and the support shaft 230 passes through the rotation hole 202. In this embodiment, the rotating components of the fan 200 are the impeller 220, the outer rotor 212, and the support shaft 230. The total mass of the rotating components is relatively large, which results in a large rotational inertia and a slow dynamic response, that is, the fan 200 starts, stops, and changes speeds slowly.

[0065] Please see Figure 3 In an optional embodiment, the motor 210 further includes: The support shaft 230 is integrally formed with the stator 211. It should be noted that the support shaft 230 and the stator 211 can be injection molded in one step, that is, the support shaft 230 and the stator 211 are formed at the same time; or, the support shaft 230 can be manufactured first, and then the support shaft 230 can be integrally formed with the stator 211 as an insert.

[0066] The outer rotor 212 is provided with a rotating hole 202, and the support shaft 230 passes through the rotating hole 202 so that the outer rotor 212 can rotate around the support shaft 230. For example, the motor 210 may also include a bearing, which is provided in the rotating hole 202, and the support shaft 230 passes through the bearing.

[0067] In this embodiment, the support shaft 230 and stator 211 are integrally formed, but not integrally formed with the outer rotor 212. The support shaft 230 does not participate in rotation; only the outer rotor 212 and impeller 220 rotate. That is, the rotating components of the fan 200 are the impeller 220 and the outer rotor 212. Compared to embodiments where the support shaft 230 and outer rotor 212 are integrally formed, this embodiment reduces the total mass of the rotating components, which lowers rotational inertia, allowing the fan 200 to start, stop, and change speed more quickly. Furthermore, lower rotational inertia allows the motor 210 to consume less energy during acceleration and deceleration, contributing to the overall energy efficiency of the fan 200.

[0068] In some embodiments, the support shaft 230 is provided with a plurality of annular grooves, and a portion of the stator 211 is embedded in the annular grooves to prevent the support shaft 230 from separating from the stator 211 along its own axial direction.

[0069] When the motor 210 starts, stops, or reverses, due to the axial component of the magnetic field and the inertia of the rotating components formed by the outer rotor 212 and the impeller 220, the rotating components will experience axial movement. This movement may cause the rotating components to collide with hard components, which will not only cause wear on the rotating components, but also generate impact noise.

[0070] To resolve the above issues, please refer to [link / reference]. Figure 3 and Figure 4 In an optional embodiment, the motor 210 further includes: An elastic element 240 is disposed between the outer rotor 212 and the stator 211 to apply a restoring force along the axial direction of the support shaft 230 to the outer rotor 212. Exemplarily, the elastic element 240 may be a spring, an elastic sleeve, a spring sheet, etc., and this application is not limited thereto.

[0071] In this embodiment, an elastic element 240 is provided between the outer rotor 212 and the stator 211. During the axial movement of the rotating component, the elastic element 240 will undergo elastic deformation. In this way, the elastic element 240 will apply a restoring force to the outer rotor 212, thereby resisting the axial movement of the rotating component and allowing the rotating component to move within a small axial range. This reduces the risk of the rotating component colliding with hard components, thereby reducing the risk of wear on the rotating component and the risk of generating impact noise.

[0072] In some embodiments, the stator 211 has a receiving space, the support shaft 230 is disposed within the receiving space, and the outer rotor 212 includes a cylindrical portion 2121 and an embedded portion 2122. The cylindrical portion 2121 is disposed on the chassis 222, and the embedded portion 2122 is disposed at the bottom of the cylindrical portion 2121 and located within the cylindrical portion 2121. The embedded portion 2122 has a rotating hole 202 and passes through the receiving space. An elastic member 240 is disposed between the embedded portion 2122 and the inner wall of the receiving space. It should be noted that when this embodiment is combined with an embodiment in which the chassis 222 includes a disc body 2221, the cylindrical portion 2121 is disposed on the disc body 2221. The magnet of the outer rotor 212 can be disposed within the cylindrical portion 2121.

[0073] Please see Figure 6 and Figure 7 In one alternative embodiment, blade 223 includes: The first blade portion 2231 and the second blade portion 2232 are engaged with the first blade portion 2231 along the thickness direction of the blade 223 to form a hollow cavity 203 between the second blade portion 2232 and the first blade portion 2231. It should be noted that the first blade portion 2231 and the second blade portion 2232 can be formed separately and then connected by ultrasonic welding, hot melt welding or other methods.

[0074] In this embodiment, the blade 223 includes a first blade portion 2231 and a second blade portion 2232, with a hollow cavity 203 formed between the first blade portion 2231 and the second blade portion 2232. That is, the blade 223 in this embodiment is a hollow blade. A hollow blade has a smaller mass, which allows the rotating component to have a smaller total mass, reducing the rotational inertia of the rotating component and enabling the fan 200 to start, stop, and change speed more quickly. Furthermore, lower rotational inertia allows the motor 210 to consume less energy during acceleration and deceleration, contributing to the overall energy efficiency of the fan 200. Of course, in other embodiments, the blade 223 may also be a solid structure; this application does not limit the specific structure of the blade 223.

[0075] Please see Figure 3 and Figure 7 In one alternative embodiment, the edge of the first blade portion 2231 is formed with a first flange 2233 extending toward the second blade portion 2232, the first flange 2233 being disposed around the second blade portion 2232 and connected to the second blade portion 2232.

[0076] In this embodiment, the edge of the first blade portion 2231 is formed with a first flange 2233 surrounding the second blade portion 2232. The first flange 2233 is connected to the second blade portion 2232. In this way, the first blade portion 2231 can be connected to the second blade portion 2232 not only through the blade surface of the first blade portion 2231, but also through the first flange 2233. This can increase the connection area between the first blade portion 2231 and the second blade portion 2232, thereby improving the connection stability between the first blade portion 2231 and the second blade portion 2232 and preventing the first blade portion 2231 and the second blade portion 2232 from becoming detached.

[0077] Of course, the edge of the first blade portion 2231 may not form the first flange 2233. In this case, the plate surface of the first blade portion 2231 near its own edge can be connected to the plate surface of the second blade portion 2232 near its own edge. The first blade portion 2231 and the second blade portion 2232 bulge in opposite directions to form a hollow cavity 203.

[0078] Please see Figure 3 and Figure 7 In one alternative embodiment, the edge of the second blade portion 2232 is formed with a second flange 2234 extending toward the first blade portion 2231, and the first flange 2233 is disposed around the second flange 2234 and connected to the second flange 2234.

[0079] In this embodiment, the edge of the second blade portion 2232 is formed with a second flange 2234 surrounding the first flange 2233. The second flange 2234 is connected to the first flange 2233. In this way, the second blade portion 2232 can not only be connected to the first blade portion 2231 through the blade surface of the second blade portion 2232, but also be connected to the first flange 2233 of the first blade portion 2231 through the second flange 2234. This can increase the connection area between the first blade portion 2231 and the second blade portion 2232, thereby improving the connection stability between the first blade portion 2231 and the second blade portion 2232 and preventing the first blade portion 2231 and the second blade portion 2232 from detaching from the connection.

[0080] In one alternative embodiment, the blade 223 has a first blade surface and a second blade surface distributed along its own thickness direction, both of which are curved surfaces.

[0081] In this embodiment, both the first and second blade surfaces are curved, which helps to disperse the centrifugal force generated when the blade 223 rotates at high speed, making the blade 223 more robust and less prone to breakage or deformation. Furthermore, the curved design guides the airflow to adhere more evenly to the surface of the blade 223, reducing turbulence and eddies, thereby reducing noise and vibration. Of course, one of the first and second blade surfaces can be planar and the other curved; alternatively, both the first and second blade surfaces can be planar.

[0082] In one optional embodiment, the air conditioner indoor unit is an embedded air conditioner indoor unit, which further includes: An indoor heat exchanger (not shown in the figure) is located inside the casing 100 and is arranged around the fan 200. The indoor heat exchanger is positioned opposite the outlet of the impeller 220.

[0083] The fan 200 is used to introduce indoor air into the housing 100 through the air inlet 101 to exchange heat with the indoor heat exchanger, and to discharge the heat-exchanged air into the room through the air outlet 102.

[0084] In this embodiment, the indoor heat exchanger is arranged around the fan 200, and the outlet of the indoor heat exchanger is opposite to that of the impeller 220. When the impeller 220 is working, it draws air in axially and then ejects it radially at high speed and evenly from its entire circumference. Because the indoor heat exchanger is arranged around and directly opposite the outlet of the impeller 220, this high-speed airflow can simultaneously and evenly blow over all the fin surfaces of the indoor heat exchanger, maximizing the utilization of the heat exchanger's surface area, avoiding uneven local heat exchange, and ensuring a very thorough and efficient heat exchange between the refrigerant and the air, thus improving the energy efficiency ratio of the indoor air conditioning unit.

[0085] The foregoing embodiments of this application focus on describing the differences between various embodiments. As long as the different optimization features between embodiments are not contradictory, they can be combined to form better embodiments. For the sake of brevity, these differences will not be elaborated upon here. The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make many modifications without departing from the spirit and scope of the claims, all of which fall within the protection scope of this application.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: The housing (100) is provided with an air inlet (101) and an air outlet (102). A fan (200), disposed within the housing (100), is used to introduce air from outside the housing (100) into the housing (100) through the air inlet (101) and exhaust it into the room through the air outlet (102). The fan (200) includes: The motor (210) includes: Stator (211); The outer rotor (212) is rotatably sleeved outside the stator (211) to rotate under the drive of the stator (211); Impeller (220), comprising: The guide ring (221) defines an inlet for air to flow into the impeller (220); The chassis (222) is located on one side of the guide ring (221) along its own axis, and the chassis (222) is separated from the guide ring (221); Multiple blades (223) are connected between the chassis (222) and the guide ring (221). The multiple blades (223) are distributed circumferentially along the guide ring (221), and an outlet for air to flow out of the impeller (220) is formed between two adjacent blades (223). The blades (223) are separately disposed from the chassis (222) and the guide ring (221), and the chassis (222) is integrally formed with the outer rotor (212).

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The chassis (222) includes: The disk body (2221) is located between the outer rotor (212) and the blade (223), and the outer rotor (212) is disposed on the disk body (2221). A first limiting part (2222) is provided on the side of the disc body (2221) facing the outer rotor (212). The first limiting part (2222) is arranged around the outer rotor (212). The first limiting part (2222) contacts the outer peripheral surface of the outer rotor (212) to stop and limit the outer rotor (212) radially.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, Along the arrangement direction of the disc body (2221) and the outer rotor (212), the protrusion height of the first limiting part (2222) is 10~30mm.

4. The indoor unit of the air conditioner according to claim 2, characterized in that, The chassis (222) also includes: The second limiting part (2223) is provided on the side of the disk body (2221) facing the outer rotor (212), and a limiting groove (201) is formed between the second limiting part (2223) and the disk body (2221). A portion of the outer rotor (212) is located within the limiting groove (201) so that the second limiting part (2223) stops and limits the outer rotor (212) in the direction of the disc (2221) pointing towards the outer rotor (212).

5. The indoor unit of the air conditioner according to claim 1, characterized in that, The motor (210) also includes: The support shaft (230) is integrally formed with the stator (211); The outer rotor (212) is provided with a rotating hole (202), and the support shaft (230) passes through the rotating hole (202) so that the outer rotor (212) can rotate around the support shaft (230).

6. The indoor unit of the air conditioner according to claim 5, characterized in that, The motor (210) also includes: An elastic element (240) is disposed between the outer rotor (212) and the stator (211) to apply a restoring force to the outer rotor (212) along the axial direction of the support shaft (230).

7. The indoor unit of the air conditioner according to claim 1, characterized in that, The blade (223) includes: First blade section (2231); The second blade portion (2232) engages with the first blade portion (2231) along the thickness direction of the blade (223) to form a hollow cavity (203) between the second blade portion (2232) and the first blade portion (2231).

8. The indoor unit of the air conditioner according to claim 7, characterized in that, The edge of the first blade portion (2231) is formed with a first flange (2233) extending toward the second blade portion (2232), the first flange (2233) is disposed around the second blade portion (2232) and connected to the second blade portion (2232).

9. The indoor unit of the air conditioner according to claim 8, characterized in that, The edge of the second blade portion (2232) is formed with a second flange (2234) extending toward the first blade portion (2231), and the first flange (2233) is disposed around the second flange (2234) and connected to the second flange (2234).

10. The air conditioning indoor unit according to any one of claims 1 to 6, characterized in that, The blade (223) has a first blade surface and a second blade surface distributed along its own thickness direction, both the first blade surface and the second blade surface being curved surfaces; and / or, the air conditioner indoor unit is an embedded air conditioner indoor unit, the embedded air conditioner indoor unit further comprising: An indoor heat exchanger is disposed inside the housing (100) and arranged around the fan (200), and the indoor heat exchanger is arranged opposite to the outlet of the impeller (220); The fan (200) is used to introduce indoor air into the housing (100) from the air inlet (101) to exchange heat with the indoor heat exchanger, and to discharge the heat-exchanged air into the room from the air outlet (102).

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