An air conditioner indoor unit

Abstract

The application discloses an indoor unit of an air conditioner, which comprises a shell, a centrifugal fan and a first clamping assembly. The shell comprises a partition plate. The centrifugal fan comprises a motor and a volute. The volute air outlet is arranged close to the partition plate. The volute comprises an upper volute connected to the partition plate and a lower volute connected below the upper volute. The lower volute and the upper volute enclose an impeller accommodating cavity. The impeller is arranged in the impeller accommodating cavity in a rotating mode and is connected to the motor. The first clamping assembly is used for connecting the upper volute and the lower volute. The first clamping assembly comprises a first clamping part arranged at one end of the upper volute in an axial direction and a second clamping part arranged at one end of the lower volute in an axial direction. The second clamping part is clamped with the first clamping part in a vertical direction. The first clamping assembly is arranged close to the partition plate. The first clamping part and / or the second clamping part can be elastically deformed in a first direction, and the first direction is perpendicular to the axis of the volute. According to the scheme, the side of the lower volute close to the partition plate can be prevented from moving relatively to the upper volute, and the connection stability is ensured.

Description

Technical Field

[0001] This application relates to the field of air conditioning equipment 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 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. Air conditioners come in various types, and based on their installation method, they can be divided into floor-standing air conditioners, wall-mounted air conditioners, and ceiling-mounted air conditioners. Ceiling-mounted air conditioners (also known as ducted air conditioners) are widely used because they occupy less effective indoor space. A ceiling-mounted air conditioner generally includes components such as a casing, a centrifugal fan, and a heat exchanger. The centrifugal fan consists of a volute, an impeller, and a motor. The impeller is located in the volute and is driven by the motor to rotate, thus delivering air. During assembly, the impeller and motor need to be pre-assembled with the volute before being installed into the outer casing.

[0004] In the prior art, the volute of the centrifugal fan in the indoor unit of an air conditioner is assembled from two parts: an upper volute and a lower volute. The upper and lower volutes are connected by a snap fastener, which is located on the side of the volute. The direction of the snap fastener's deformation under stress is parallel to the axis of the volute. During motor operation, it will move axially, causing the impeller to impact the volute. This axial impact will cause the snap fastener to deform under stress and disengage, resulting in relative movement and separation of the upper and lower volutes. Utility Model Content

[0005] This application discloses an indoor air conditioning unit that can prevent the volute from disengaging due to deformation of the latch when subjected to axial impact, and prevent relative movement between the lower volute and the upper volute on the side near the partition, thus ensuring the connection stability between the upper and lower volutes on the side near the partition.

[0006] To achieve the above objectives, some embodiments of this application provide an indoor air conditioning unit, comprising: a casing, wherein the casing is provided with a casing air outlet and a casing air inlet, and a casing receiving cavity is formed within the casing; the casing includes: a partition, wherein the partition is disposed within the casing receiving cavity, the partition dividing the casing receiving cavity into an air inlet cavity and an air outlet cavity, the air inlet cavity communicating with the casing air inlet, and the air outlet cavity communicating with the casing air outlet; a centrifugal fan, wherein the centrifugal fan is disposed within the air inlet cavity, the centrifugal fan including: a motor, the motor being disposed within the casing; a volute, wherein the volute has a volute air inlet and a volute air outlet, the volute air outlet being disposed near the partition, the volute air inlet communicating with the air inlet cavity, and the volute air outlet communicating with the air outlet cavity; the volute including: an upper volute, wherein... The upper volute is connected to the partition plate; the lower volute is connected below the upper volute, and the lower volute and the upper volute form an impeller receiving cavity; the impeller is rotatably disposed within the impeller receiving cavity, and the impeller is connected to the motor; a first snap-fit ​​assembly is used to connect the upper volute and the lower volute, and the first snap-fit ​​assembly includes: a first snap-fit ​​part disposed at one axial end of the upper volute; a second snap-fit ​​part disposed at one axial end of the lower volute, and the second snap-fit ​​part snaps with the first snap-fit ​​part in a vertical direction; wherein, the first snap-fit ​​assembly is disposed near the partition plate, and the first snap-fit ​​part and / or the second snap-fit ​​part can elastically deform along a first direction, and the first direction is perpendicular to the axis of the volute.

[0007] Thus, since the first and second locking parts can elastically deform in the first direction perpendicular to the axis of the volute, it means that when the volute is subjected to axial impact, the first and second locking parts will not be subjected to force in the first direction, and will not cause the first and second locking parts to separate. This avoids the relative displacement between the side of the lower volute near the partition and the side of the lower volute near the partition caused by the axial impact of the volute, and ensures the reliability of the connection between the side of the upper volute near the partition and the side of the lower volute near the partition.

[0008] In some embodiments of this application, the first snap-fit ​​portion includes a buckle that is elastically deformable along the first direction; the second snap-fit ​​portion includes a retaining ring that has a through hole extending in a vertical direction, and the buckle passes through the through hole and snaps into the end face of the retaining ring in a vertical direction.

[0009] Thus, during installation, simply align the buckle with the through hole on the retaining ring and let the buckle pass through the through hole. Once the buckle passes through the through hole, it will engage with the end face of the retaining ring under the action of elasticity. This engagement method makes the connection between the upper and lower volutes simpler and improves installation efficiency.

[0010] Furthermore, because the buckle can deform elastically, when the buckle is subjected to external force, it can adapt to the change of force through elastic deformation within a certain range, thereby ensuring the connection stability between the upper and lower volutes and preventing it from easily coming loose, thus improving the structural reliability of the volute.

[0011] In some embodiments of this application, there are two buckles, which are arranged opposite to each other and spaced apart along the first direction. Both buckles pass through the through hole and engage with the end face of the retaining ring.

[0012] Thus, on the one hand, compared to a single clip, two back-to-back clips, after engaging, can better prevent loosening at the connection between the upper and lower volutes, making the connection more stable and improving the stability of the volute structure. On the other hand, the design of two clips adds redundancy to the first engaging component. Even if one clip loses its engaging function due to accidental damage or aging, the other clip can still play a certain fixing role, maintaining the basic connection of the volute and preventing the indoor unit of the air conditioner from completely stopping working due to volute connection failure.

[0013] In some embodiments of this application, the first snap-fit ​​assembly further includes: a first limiting portion disposed on the first snap-fit ​​portion; and a second limiting portion disposed on the second snap-fit ​​portion, wherein the first limiting portion and the second limiting portion are inserted into each other in a vertical direction.

[0014] Thus, on the one hand, the first limiting part and the second limiting part are inserted vertically. This insertion method adds an additional limiting function on the basis of snap-fit, which can prevent the relative displacement of the upper and lower volutes in the axial and radial directions, making the connection between the upper and lower volutes more secure, further improving the stability of the volute, and ensuring that the volute will not loosen or shift during the operation of the air conditioner indoor unit.

[0015] On the other hand, even if there are certain assembly errors during the installation process, the insertion of the first and second limiting parts can guide the buckles and rings to be correctly aligned, automatically aligning the positions of the upper and lower volutes, reducing the high requirements for installation accuracy, thus ensuring smooth installation and improving installation efficiency.

[0016] In some embodiments of this application, the first limiting part includes a limiting post, the second limiting part includes a limiting hole, the limiting post passes through the limiting hole, and the gap between the outer wall of the limiting post and the inner wall of the limiting hole is 0.15mm to 0.25mm.

[0017] Thus, the gap between the outer wall of the limiting post and the inner wall of the limiting hole is set to 0.15mm to 0.25mm, which makes it relatively easy to insert the limiting post and the limiting hole during installation. It will not be difficult to align due to the gap being too small, nor will it cause unstable connection due to the gap being too large. This ensures a tight fit between the components and provides a certain degree of operational flexibility, making the installation process smoother and reducing assembly difficulty.

[0018] In some embodiments of this application, along the first direction, the distance between the second limiting portion and the inner wall of the through hole is greater than or equal to the width of the buckle.

[0019] This design ensures that the buckle has sufficient space for elastic deformation when it passes through the through hole and engages with the end face of the retaining ring, preventing obstruction by the second limiting part and guaranteeing installation reliability. Furthermore, when it is necessary to disassemble the buckle and retaining ring, the distance between the second limiting part and the inner wall of the through hole provides sufficient elastic deformation space for the buckle, ensuring that the buckle can disengage from the retaining ring.

[0020] In some embodiments of this application, the second limiting part is disposed on the inner wall of the through hole near the volute, and there is a gap between the through hole and the inner wall of the volute away from the volute. Along the axial direction of the volute, the buckle is away from the air inlet of the volute relative to the second limiting part.

[0021] In this way, when the operator removes the lower volute, it is easier to access and operate the clips, which facilitates the disassembly of the lower volute and reduces maintenance costs.

[0022] In some embodiments of this application, the end of the buckle facing the second limiting portion is provided with a clearance portion. When the buckle deforms towards the second limiting portion to disengage from the retaining ring, the clearance portion is used to avoid the second limiting portion.

[0023] Thus, when the buckle needs to be disengaged from the retaining ring, as the buckle deforms towards the second limiting part, the avoidance part smoothly avoids the second limiting part, reducing resistance during disassembly and making the disassembly operation easier. Furthermore, the presence of the avoidance part prevents direct collision or excessive friction between the buckle and the second limiting part during deformation and disengagement, helping to reduce wear on the buckle and the second limiting part, extending the service life of the components, and ensuring the long-term reliability of the first engaging assembly.

[0024] In some embodiments of this application, the first snap-fit ​​assembly is in two sets, and the two sets of the first snap-fit ​​assembly are respectively disposed at both ends of the upper volute and the lower volute along the axial direction.

[0025] In this way, when either side of the volute is subjected to axial impact, the upper and lower volutes can achieve a stable connection through the cooperation of the first and second locking parts, avoiding relative displacement of the lower volute relative to the upper volute due to axial impact on one side of the volute, and further ensuring a stable connection between the upper and lower volutes.

[0026] In some embodiments of this application, the centrifugal fan further includes: a second snap-fit ​​assembly disposed away from the partition plate; the second snap-fit ​​assembly includes: a third snap-fit ​​portion disposed at one axial end of the upper volute; and a fourth snap-fit ​​portion disposed at one axial end of the lower volute, the fourth snap-fit ​​portion being snapped with the third snap-fit ​​portion in a vertical direction; wherein the third snap-fit ​​portion and / or the fourth snap-fit ​​portion are capable of elastic deformation in a second direction, and the second direction is parallel to the axis of the volute.

[0027] Thus, since the second direction in which the third and fourth locking parts can elastically deform is parallel to the axis of the volute, it means that the third and fourth locking parts will not elastically deform when the volute is subjected to radial impact, ensuring the connection stability between the upper and lower volutes on the side away from the partition. Furthermore, under the combined action of the second and first locking assemblies, the volute can withstand both axial and radial impacts, enhancing its overall impact resistance. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a schematic diagram of the structure of an air conditioner indoor unit disclosed in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the centrifugal fan and baffle assembly disclosed in the embodiments of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a volute disclosed in one embodiment of this application;

[0032] Figure 4 This is a side view of a volute disclosed in one embodiment of this application;

[0033] Figure 5 This is an exploded view of the volute disclosed in one embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the structure of the volute disclosed in another embodiment of this application;

[0035] Figure 7 This is a side view of the volute disclosed in another embodiment of this application;

[0036] Figure 8 This is an exploded view of the volute disclosed in another embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the structure of the volute disclosed in another embodiment of this application;

[0038] Figure 10 This is a side view of the volute disclosed in another embodiment of this application;

[0039] Figure 11 This is a top view of a volute disclosed in one embodiment of this application;

[0040] Figure 12 for Figure 11 A partial view at point A in the middle.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100 - Air conditioner indoor unit;

[0043] 1-Casing; 1a-Casing air inlet; 1b-Casing air outlet; 11-Baffle;

[0044] 2-Centrifugal fan; 21-Motor; 22-Volume casing; 22a-Volume casing inlet; 22b-Volume casing outlet; 22c-Impeller housing; 221-Upper volume casing; 2211-Upper volume casing body; 2212-Outlet guide; 222-Lower volume casing; 23-Impeller; 24-First snap-fit ​​assembly; 241-First snap-fit ​​part; 2411-Snap fastener; 24111-Allowing part; 242-Second snap-fit ​​part; 2421-Snap ring; 2421a-Through hole; 243-First limiting part; 244-Second limiting part; 25-Second snap-fit ​​assembly; 251-Third snap-fit ​​part; 252-Fourth snap-fit ​​part;

[0045] X - First direction; Y - Second direction. Detailed Implementation

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (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, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0051] 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.

[0052] Currently, more and more people are choosing to install air conditioners indoors to regulate the temperature of the air. Air conditioners come in various types, and based on their installation method, they can be divided into floor-standing air conditioners, wall-mounted air conditioners, and ceiling-mounted air conditioners. Ceiling-mounted air conditioners (also known as ducted units) typically use an embedded design, with the indoor unit hidden within the ceiling, only the supply and return air vents visible in the room. This concealed installation not only avoids the space-consuming problem of traditional air conditioners but also maintains the overall aesthetics of the interior decoration. Furthermore, ducted air conditioners are suitable for various apartment layouts and decorating styles. Whether it's a small or large apartment, a modern minimalist style or a classic Chinese style, ceiling-mounted air conditioners can blend perfectly with the interior design. In addition, ceiling-mounted air conditioners can also meet the different temperature and humidity needs of different rooms through zone control. Therefore, ceiling-mounted air conditioners have become an increasingly popular choice due to their high aesthetic appeal, strong adaptability, and cost-effectiveness. A ceiling-mounted air conditioner generally includes components such as a casing, centrifugal fan, and heat exchanger. A centrifugal fan consists of a volute, an impeller, and a motor. The impeller is located inside the volute and is driven to rotate by the motor to deliver air. During assembly, the impeller and motor need to be pre-assembled with the volute before being installed into the outer casing.

[0053] In related technologies, the volute is assembled from two parts: an upper volute and a lower volute, connected by a snap-fit ​​mechanism. The upper volute is attached to a partition plate. However, during motor operation, axial movement occurs, causing the impeller to impact the volute. This results in axial impact on the volute. The snap-fit ​​mechanism near the partition plate deforms parallel to the volute's axis, potentially causing it to disengage. Because the upper volute is connected to the partition plate, the lower volute's side near the partition plate shifts relative to the upper volute's side near the partition plate, causing the upper and lower volutes to separate.

[0054] Based on this, the present application provides an indoor air conditioner unit that can prevent relative movement between the lower volute and the upper volute on the side near the partition, thus ensuring the connection stability between the upper and lower volutes on the side near the partition.

[0055] The present technical solution will be further described below with reference to the embodiments and accompanying drawings.

[0056] Please see Figure 1This application provides an indoor air conditioning unit 100, which is the indoor unit of a ducted air conditioner. The indoor air conditioning unit 100 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 transfers 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.

[0057] The indoor unit 100 of the air conditioner includes a casing 1. The casing 1 is provided with a casing air inlet 1a and a casing air outlet 1b. The casing air inlet 1a is used to guide airflow into the interior of the casing 1, and the casing air outlet 1b is used to guide airflow into the room. A casing receiving cavity is formed inside the casing 1, and components such as a condenser are arranged in the casing receiving cavity.

[0058] like Figure 2 As shown, the housing 1 includes a partition 11, which is disposed in the housing cavity (not shown in the figure). The partition 11 divides the housing cavity into an air inlet cavity (not shown in the figure) and an air outlet cavity (not shown in the figure). The air inlet cavity is connected to the housing air inlet 1a, and the air outlet cavity is connected to the housing air outlet 1b.

[0059] like Figure 2 As shown, the indoor unit 100 of the air conditioner also includes a centrifugal fan 2, which is installed in the air inlet cavity. The centrifugal fan 2 can introduce airflow from the air inlet 1a of the casing into the air inlet cavity and blow air into the room from the air outlet 1b of the casing.

[0060] The centrifugal fan 2 includes a motor 21, which is mounted on the casing 1.

[0061] like Figure 3 and Figure 4 As shown, the centrifugal fan 2 also includes a volute 22, which has a volute inlet 22a and a volute outlet 22b. The volute outlet 22b is located near the partition 11. The volute inlet 22a communicates with the inlet chamber, and the volute outlet 22b communicates with the outlet chamber. The volute 22 is an important component of the centrifugal fan 2. The volute 22 is used to guide airflow. By designing a specific volute shape, the airflow can rotate along the curved shape of the volute 22 as it flows through the centrifugal fan 2, gradually accelerating. Furthermore, due to the shape of the volute 22, the kinetic energy of the airflow increases as it flows through the volute 22.

[0062] The volute 22 includes an upper volute 221, which is connected to the partition 11.

[0063] The volute 22 also includes a lower volute 222, which is connected to the lower part of the upper volute 221. The lower volute 222 and the upper volute 221 together form an impeller receiving cavity 22c.

[0064] like Figure 2 As shown, the centrifugal fan 2 also includes an impeller 23, which is rotatably disposed in the impeller housing cavity 22c. The impeller 23 is connected to the motor 21, and the motor 21 drives the impeller 23 to rotate so that the airflow can enter the volute 22 from the volute inlet 22a.

[0065] like Figure 4 and Figure 5 As shown, the centrifugal fan 2 also includes a first snap-fit ​​assembly 24, which is used to connect the upper volute 221 and the lower volute 222. The first snap-fit ​​assembly 24 includes a first snap-fit ​​part 241, which is disposed at one end of the upper volute 221 along the axial direction.

[0066] The first snap-fit ​​assembly 24 also includes a second snap-fit ​​part 242, which is disposed at one end of the lower volute 222 along the axial direction, and the second snap-fit ​​part 242 is snapped with the first snap-fit ​​part 241 in the vertical direction.

[0067] The first snap-fit ​​component 24 is disposed near the partition 11. The first snap-fit ​​part 241 and / or the second snap-fit ​​part 242 can elastically deform along the first direction X, and the first direction X is perpendicular to the axis of the volute 22. In this embodiment, the first direction X is also the front-rear direction of the housing 1.

[0068] In related technologies, the upper volute 221 is connected to the partition 11. The upper volute 221 and the lower volute 222 are connected by the engagement of the first engaging part 241 and the second engaging part 242. Since the direction of elastic deformation of the first engaging part 241 and the second engaging part 242 is parallel to the axis of the volute 22, when the volute 22 receives an axial impact, the first engaging part 241 and the second engaging part 242 will deform under force, causing them to separate. The side of the upper volute 221 near the partition 11 is not easy to move because it is connected to the partition 11. The side of the lower volute 222 near the partition 11 will have a relative displacement relative to the side of the upper volute 221 near the partition 11, causing the side of the lower volute 222 near the partition 11 to separate from the upper volute 221.

[0069] In this embodiment, the upper volute 221 and the lower volute 222 are connected near the partition 11 via the first snap-fit ​​part 241 and the second snap-fit ​​part 242 of the first snap-fit ​​assembly 24. Since the first direction X in which the first snap-fit ​​part 241 and the second snap-fit ​​part 242 can elastically deform is perpendicular to the axis of the volute 22, it means that when the volute 22 is subjected to axial impact, the first snap-fit ​​part 241 and the second snap-fit ​​part 242 will not be subjected to force in the first direction X, thus preventing the first snap-fit ​​part 241 and the second snap-fit ​​part 242 from disengaging. This avoids the relative displacement of the side of the lower volute 222 near the partition 11 relative to the upper volute 221 when the volute 222 is subjected to axial impact, ensuring the reliability of the connection between the side of the upper volute 221 near the partition 11 and the side of the lower volute 222 near the partition 11.

[0070] It should be noted that in this embodiment, the ability of the first latching portion 241 and / or the second latching portion 242 to elastically deform along the first direction X means that the first latching portion 241 can elastically deform along the first direction X, or the second latching portion 242 can elastically deform along the first direction X, or even that both the first latching portion 241 and the second latching portion 242 can elastically deform along the first direction X.

[0071] In some embodiments, such as Figure 5 As shown, the first snap-fit ​​portion 241 includes a snap fastener 2411, which is capable of elastic deformation along the first direction X.

[0072] The second engaging portion 242 includes a retaining ring 2421, which has a through hole 2421a extending vertically. A snap fastener 2411 passes through the through hole 2421a and engages with the end face of the retaining ring 2421 vertically. That is, the upper volute 221 and the lower volute 222 are connected by the snap fastener 2411 and the retaining ring 2421.

[0073] During installation, simply align the buckle 2411 with the through hole 2421a on the retaining ring 2421, and let the buckle 2411 pass through the through hole 2421a. After the buckle 2411 passes through the through hole 2421a, the buckle 2411 will engage with the end face of the retaining ring 2421 under the action of elasticity. This engagement method makes the connection between the upper volute 221 and the lower volute 222 simpler and improves the installation efficiency.

[0074] Furthermore, since the buckle 2411 can elastically deform, when the buckle 2411 is subjected to external force, it can adapt to the change of force through elastic deformation within a certain range, thereby ensuring the connection stability between the upper volute 221 and the lower volute 222, preventing it from easily coming loose, and improving the structural reliability of the entire volute 22.

[0075] It is understood that, in addition to the first snap-fit ​​portion 241 being a buckle 2411 and the second snap-fit ​​portion 242 being a snap ring 2421 as described in the above embodiment, the first snap-fit ​​portion 241 may also be a snap ring 2421 and the second snap-fit ​​portion 242 may be a buckle 2411. This embodiment does not specifically limit this.

[0076] In some embodiments, see Figures 6 to 8 There are two buckles 2411. The two buckles 2411 are set opposite to each other along the first direction X and are spaced apart. Both buckles 2411 pass through the through hole 2421a of the retaining ring 2421 and are engaged with the end face of the retaining ring 2421.

[0077] On the one hand, compared to a single clip 2411, two opposing and spaced clips 2411, after being engaged, can better prevent loosening at the connection between the upper volute 221 and the lower volute 222, making the connection between the upper volute 221 and the lower volute 222 more stable and improving the stability of the volute 22 structure. On the other hand, the design of two clips 2411 adds redundancy to the first engagement component 24. Even if one clip 2411 loses its engagement function due to accidental damage or aging, the other clip 2411 can still play a certain fixing role, maintaining the basic connection of the volute 22 and preventing the indoor unit 100 of the air conditioner from completely stopping operation due to the failure of the volute 22 connection.

[0078] It should be noted that, in addition to Figure 5 The buckle 2411 shown is located near the partition 11 and can also be used for Figure 9 and Figure 10 The buckle 2411 described herein is disposed opposite to the partition plate 11, that is, the buckle 2411 is close to the air inlet 22a of the volute in the first direction X. The deformation direction of the buckle 2411 is always perpendicular to the axis of the volute 22. This embodiment does not specifically limit this.

[0079] In some embodiments, such as Figure 6 and Figure 8 As shown, the first snap-fit ​​assembly 24 also includes a first limiting part 243, which is disposed on the first snap-fit ​​part 241.

[0080] The first snap-fit ​​assembly 24 also includes a second limiting part 244, which is disposed on the second snap-fit ​​part 242, and the first limiting part 243 and the second limiting part 244 are inserted into each other in the vertical direction.

[0081] On the one hand, the first limiting part 243 and the second limiting part 244 are inserted vertically. This insertion method adds an additional limiting function on the basis of snap-fit, which can prevent the relative displacement of the upper volute 221 and the lower volute 222 in the axial and radial directions, making the connection between the upper volute 221 and the lower volute 222 more secure, further improving the stability of the volute 22, and ensuring that the volute 22 will not loosen or shift during the operation of the air conditioner indoor unit 100.

[0082] On the other hand, even if there are certain assembly errors during the installation process, the insertion of the first limiting part 243 and the second limiting part 244 can guide the buckle 2411 and the retaining ring 2421 to be correctly aligned, and can automatically align the positions of the upper volute 221 and the lower volute 222, reducing the high requirements for installation accuracy, thereby ensuring the smooth progress of installation and improving installation efficiency.

[0083] It should be noted that the first limiting part 243 can be either a limiting post or a limiting hole, and the second limiting part 244 can be either a limiting post or a limiting hole. That is to say, when the first limiting part 243 is a limiting post, the second limiting part 244 is a limiting hole; when the first limiting part 243 is a limiting hole, the second limiting part 244 is a limiting post.

[0084] It is understandable that the limiting hole is a hole formed by a ring structure, which has a certain wall thickness.

[0085] In some embodiments, the first limiting part 243 includes a limiting post, and the second limiting part 244 includes a limiting hole. The limiting post passes through the limiting hole, and the gap between the outer wall of the limiting post and the inner wall of the limiting hole is 0.15mm to 0.25mm.

[0086] When the gap between the outer wall of the limiting post and the inner wall of the limiting hole is less than 0.15mm, it means that the gap between the outer wall of the limiting post and the inner wall of the limiting hole is too small. This will increase the resistance when inserting the limiting post into the limiting hole, increase the difficulty of installation, and make it easy for the installation to be incomplete.

[0087] When the gap between the outer wall of the limiting post and the inner wall of the limiting hole is greater than 0.25mm, it means that the gap between the outer wall of the limiting post and the inner wall of the limiting hole is too large. The excessive gap will make it easy for the limiting post and the limiting hole to loosen after the limiting post is inserted into the limiting hole, resulting in an unstable connection between the upper volute 221 and the lower volute 222, which will affect the normal operation of the indoor unit of the air conditioner.

[0088] Therefore, in this embodiment, the gap between the outer wall of the limiting post and the inner wall of the limiting hole is set to 0.15mm to 0.25mm. This allows the limiting post and the limiting hole to be easily inserted during installation, preventing misalignment due to an excessively small gap and instability due to an excessively large gap. This ensures a tight fit between components while providing some operational flexibility, making the installation process smoother and reducing assembly difficulty. For example, the gap between the outer wall of the limiting post and the inner wall of the limiting hole is 0.2mm. This ensures that the limiting post can be easily inserted into the limiting hole and that the connection between the upper volute 221 and the lower volute 222 is stable, preventing loosening or displacement due to an unsuitable gap, thus improving the reliability of the entire first snap-fit ​​assembly 24.

[0089] It should be noted that the gap between the outer wall of the limiting post and the inner wall of the limiting hole can be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm or 0.25mm, as long as it is within the range of 0.15mm to 0.25mm. This embodiment does not impose a specific limitation on this.

[0090] It should be noted that the limiting post may be provided with a threaded hole. After the limiting post is inserted into the limiting hole, a fastener is screwed into the threaded hole to secure the limiting post to the limiting hole. This can further ensure the stability and reliability of the connection between the upper volute 221 and the lower volute 222.

[0091] In some embodiments, such as Figure 11 and Figure 12 As shown, along the first direction X, the distance L between the second limiting part 244 and the inner wall of the through hole 2421a of the retaining ring 2421 is greater than or equal to the width of the buckle 2411. If the distance L between the first limiting part 243 and the inner wall of the through hole 2421a of the retaining ring 2421 is less than the width of the buckle 2411, the buckle 2411 will be obstructed by the second limiting part 244 during the snap-fit ​​process, causing the buckle 2411 to be unable to pass through the through hole 2421a and snap-fit ​​with the end face of the retaining ring 2421.

[0092] In this embodiment, the distance L between the second limiting part 244 and the inner wall of the through hole 2421a of the retaining ring 2421 is greater than or equal to the width of the buckle 2411. This ensures that when the buckle 2411 passes through the through hole 2421a and engages with the end face of the retaining ring 2421, it has sufficient space for elastic deformation and will not be blocked by the second limiting part 244, thus ensuring the reliability of the installation. Furthermore, when it is necessary to disassemble the buckle 2411 and the retaining ring 2421, the distance L between the second limiting part 244 and the inner wall of the retaining ring 2421 provides sufficient elastic deformation space for the buckle 2411, ensuring that the buckle 2411 can be disengaged from the retaining ring 2421.

[0093] In some embodiments, such as Figure 12 As shown, the second limiting part 244 is disposed in the through hole 2421a of the retaining ring 2421 near the inner wall of the volute 22, and there is a gap between it and the through hole 2421a of the retaining ring 2421 away from the inner wall of the volute 22. Along the axial direction of the volute 22, the buckle 2411 is away from the volute 22 relative to the second limiting part 244. That is to say, the second limiting part 244, which is a limiting hole, is disposed in the through hole 2421a of the retaining ring 2421 near the inner wall of the volute 22, and the buckle 2411 is away from the volute 22 relative to the second limiting part 244. The gap between the second limiting part 244 and the through hole 2421a of the retaining ring 2421 away from the inner wall of the volute 22 provides space for the elastic deformation of the buckle 2411.

[0094] When the second limiting part 244 is located in the through hole 2421a of the retaining ring 2421, away from the inner wall of the volute 22, and the buckle 2411 is close to the volute 22, the operator needs to reach from below to the side near the air inlet 22a of the volute to operate the buckle 2411 when disassembling the lower volute 222, which is not easy to operate. In this embodiment, the second limiting part 244 is located in the through hole 2421a of the retaining ring 2421, close to the inner wall of the volute 22, and the buckle 2411 is away from the volute 22 relative to the second limiting part 244. When the operator disassembles the lower volute 222, it is easier to contact the buckle 2411 and operate the buckle 2411, which facilitates the disassembly of the lower volute 222 and reduces maintenance costs.

[0095] In some embodiments, such as Figure 12 As shown, the end of the buckle 2411 facing the second limiting part 244 is provided with a relief part 24111. When the buckle 2411 deforms towards the second limiting part 244 to disengage from the retaining ring 2421, the relief part 24111 is used to avoid the second limiting part 244. The relief part 24111 on the buckle 2411 is a chamfer.

[0096] When the latch 2411 disengages from the retaining ring 2421, it needs to deform towards the second limiting part 244. During this deformation, the second limiting part 244 may interfere with, collide with, or rub against the latch 2411. In this embodiment, because a clearance part 24111 is provided at one end of the latch 2411 facing the second limiting part 244, when the latch 2411 needs to be disengaged from the retaining ring 2421, it can smoothly avoid the second limiting part 244 through the clearance part 24111 during its deformation towards the second limiting part 244. This reduces the resistance during disassembly and makes the disassembly operation easier. Furthermore, the presence of the avoidance part 24111 prevents the buckle 2411 from directly colliding with or excessively rubbing against the second limiting part 244 when it deforms and disengages, which helps to reduce the wear of the buckle 2411 and the second limiting part 244, extend the service life of the components, and ensure the long-term reliability of the first snap-fit ​​assembly 24.

[0097] It should be noted that the clearance portion 24111 can be a chamfer, a rounded corner, a groove, or a clearance slot. This embodiment does not specifically limit it in this regard.

[0098] In some embodiments, such as Figure 11 As shown, there are two sets of first snap-fit ​​components 24, which are respectively disposed at both ends of the upper volute 221 and the lower volute 222 along the axial direction. That is to say, the upper volute 221 has a first snap-fit ​​part 241 at both ends along the axial direction near the partition 11, and the lower volute 222 has a second snap-fit ​​part 242 at both ends along the axial direction near the partition 11.

[0099] In this way, when the volute 22 is subjected to axial impact on either side along the axial direction, the upper volute 221 and the lower volute 222 can achieve a stable connection with the cooperation of the first locking part 241 and the second locking part 242. This avoids the lower volute 222 from being relatively displaced relative to the upper volute 221 due to axial impact on one side of the volute 22, and further ensures a stable connection between the upper volute 221 and the lower volute 222.

[0100] In some embodiments, combined with Figure 3 and Figure 4 The partition 11 is provided with mounting holes (not shown in the figure). The upper volute 221 includes an upper volute body 2211. The upper volute body 2211 and the lower volute 222 are located on the same side of the partition 11. The upper volute body 2211 and the lower volute 222 form an impeller receiving cavity 22c and a volute air inlet 22a.

[0101] The upper volute 221 also includes an air outlet guide 2212, which is connected to the upper volute body 2211. The air outlet guide 2212 has a volute air outlet 22b, which passes through the mounting hole of the partition 11. This means that the volute air outlet 22b is formed on the air outlet guide 2212 of the upper volute 221, and is not composed of the upper volute 221 and the lower volute 222 together. If the volute air outlet 22b were composed of the upper volute 221 and the lower volute 222 together, both the upper volute 221 and the lower volute 222 would need to be connected to the partition 11, and a portion of both the upper volute 221 and the lower volute 222 would need to pass through the mounting hole of the partition 11 to form the volute air outlet 22b. This would be more complicated to assemble or disassemble, increasing the difficulty and cost of later maintenance.

[0102] In this embodiment, since the volute air outlet 22b is formed separately on the air outlet guide 2212 of the upper volute 221, and the lower volute 222 is only connected to the upper volute body 2211, the lower volute 222 can be easily removed to observe the internal condition of the volute 22 during later maintenance. This facilitates maintenance and avoids the need to remove both the lower volute 222 and the upper volute 221 from the partition 11 for maintenance, reducing the disassembly and assembly processes and thus lowering maintenance costs. Furthermore, since the air outlet guide 2212 with the volute air outlet 22b passes through the mounting hole of the partition 11, the airflow can flow directly within the air outlet guide 2212 and then be directly discharged into the air outlet cavity through the volute air outlet 22b. This eliminates the need for sealing treatment on the mounting hole of the partition 11 or the volute air outlet 22b, reducing the manufacturing cost of the air conditioner indoor unit 100.

[0103] In some embodiments, see Figures 3 to 5 The centrifugal fan 2 also includes a second snap-fit ​​assembly 25, which is disposed away from the partition 11. The second snap-fit ​​assembly 25 includes a third snap-fit ​​part 251, which is disposed at one end of the upper volute 221 along the axial direction.

[0104] The second snap-fit ​​assembly 25 also includes a fourth snap-fit ​​part 252, which is disposed at one end of the lower volute 222 along the axial direction, and the fourth snap-fit ​​part 252 is snapped with the third snap-fit ​​part 251 in the vertical direction.

[0105] The third snap-fit ​​portion 251 and / or the fourth snap-fit ​​portion 252 are capable of elastic deformation along the second direction Y, and the second direction Y is parallel to the axis of the volute 22.

[0106] Since the second direction Y in which the third locking portion 251 and the fourth locking portion 252 can elastically deform is parallel to the axis of the volute 22, it means that when the volute 22 is subjected to radial impact, the third locking portion 251 and the fourth locking portion 252 will not undergo elastic deformation, ensuring the connection stability between the upper volute 221 and the lower volute 222 on the side away from the partition 11. Furthermore, under the combined action of the second locking assembly 25 and the first locking assembly 24, the volute 22 can withstand both axial and radial impacts, enhancing the overall impact resistance of the volute 22.

[0107] In some embodiments, the second snap-fit ​​assembly 25 can be two sets, with the two sets of second snap-fit ​​assemblies 25 respectively disposed at both ends of the upper volute 221 and the lower volute 222 along the axial direction. That is, a third snap-fit ​​portion 251 is provided on the side of the upper volute 221 away from the partition 11 along the axial direction, and a fourth snap-fit ​​portion 252 is provided on the side of the lower volute 222 away from the partition 11 along the axial direction. In this way, both sides of the upper volute 221 and the lower volute 222 along the axial direction can withstand radial impact, making the connection between the upper volute 221 and the lower volute 222 more stable.

[0108] 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. An indoor unit for an air conditioner, characterized in that, The indoor unit of the air conditioner includes: The housing includes an air outlet and an air inlet, and a housing cavity is formed inside the housing. The housing comprises: A partition is disposed within the housing cavity, dividing the housing cavity into an air inlet cavity and an air outlet cavity. The air inlet cavity is connected to the air inlet of the housing, and the air outlet cavity is connected to the air outlet of the housing. Centrifugal fan, wherein the centrifugal fan is disposed within the air inlet chamber, the centrifugal fan comprising: The motor is mounted on the housing; A volute, comprising a volute air inlet and a volute air outlet, the volute air outlet being disposed near the partition, the volute air inlet communicating with the air inlet cavity, and the volute air outlet communicating with the air outlet cavity, the volute comprising: Upper volute, the upper volute being connected to the partition; The lower volute is connected below the upper volute, and the lower volute and the upper volute together form an impeller receiving cavity; An impeller is rotatably disposed within an impeller housing cavity and is connected to the motor; A first snap-fit ​​assembly, used to connect the upper volute and the lower volute, the first snap-fit ​​assembly comprising: The first snap-fit ​​portion is disposed at one end of the upper volute along the axial direction; The second snap-fit ​​part is disposed at one end of the lower volute along the axial direction, and the second snap-fit ​​part is snapped with the first snap-fit ​​part in the vertical direction; The first snap-fit ​​assembly is disposed close to the partition plate, and the first snap-fit ​​portion and / or the second snap-fit ​​portion are capable of elastic deformation along a first direction, and the first direction is perpendicular to the axis of the volute.

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The first snap-fit ​​portion includes a snap fastener, which is elastically deformable along the first direction; The second snap-fit ​​portion includes a snap ring having a through hole extending in a vertical direction, and the buckle passes through the through hole and snaps into the end face of the snap ring in a vertical direction.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, There are two buckles, which are positioned opposite each other and spaced apart along the first direction. Both buckles pass through the through hole and engage with the end face of the retaining ring.

4. The indoor unit of the air conditioner according to claim 2 or 3, characterized in that, The first card connector also includes: The first limiting part is disposed on the first snap-fit ​​part; The second limiting part is disposed on the second snap-fit ​​part, and the first limiting part and the second limiting part are inserted into each other in the vertical direction.

5. The indoor unit of the air conditioner according to claim 4, characterized in that, The first limiting part includes a limiting post, and the second limiting part includes a limiting hole. The limiting post passes through the limiting hole, and the gap between the outer wall of the limiting post and the inner wall of the limiting hole is 0.15mm to 0.25mm.

6. The indoor unit of the air conditioner according to claim 4, characterized in that, Along the first direction, the distance between the second limiting part and the inner wall of the through hole is greater than or equal to the width of the buckle.

7. The indoor unit of the air conditioner according to claim 4, characterized in that, The second limiting part is disposed on the inner wall of the through hole near the volute, and there is a gap between the through hole and the inner wall of the volute away from the volute. Along the axial direction of the volute, the buckle is away from the volute relative to the second limiting part.

8. The indoor unit of the air conditioner according to claim 4, characterized in that, The buckle is provided with a clearance portion at one end facing the second limiting part. When the buckle deforms towards the second limiting part to disengage from the retaining ring, the clearance portion is used to avoid the second limiting part.

9. The indoor unit of the air conditioner according to claim 1, characterized in that, The first snap-fit ​​assembly consists of two sets, with the two sets of the first snap-fit ​​assembly respectively disposed at both ends of the upper volute and the lower volute along the axial direction.

10. The indoor unit of the air conditioner according to claim 1, characterized in that, The centrifugal fan also includes: A second snap-fit ​​assembly is disposed away from the partition, and the second snap-fit ​​assembly includes: The third snap-fit ​​portion is disposed at one end of the upper volute along the axial direction; The fourth snap-fit ​​part is disposed at one end of the lower volute along the axial direction, and the fourth snap-fit ​​part is snapped with the third snap-fit ​​part in the vertical direction; The third snap-fit ​​portion and / or the fourth snap-fit ​​portion are capable of elastic deformation along a second direction, and the second direction is parallel to the axis of the volute.

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