Centrifugal impeller, centrifugal fan and air conditioner

Abstract

The utility model discloses a centrifugal impeller, centrifugal fan and air conditioner, centrifugal fan includes drive motor and centrifugal impeller, and centrifugal impeller includes: middle disc subassembly, main hub, bottom disc, blade and frame, be equipped with the ladder part on main hub, and the ladder part includes: first ladder section, second ladder section and third ladder section, and first ladder section is connected in the outer circumferential side of middle disc subassembly, and second ladder section is connected in the outer circumferential side of first ladder section, and third ladder section is connected in the outer circumferential side of second ladder section, and bottom disc is connected in the outer circumferential side of third ladder section. Since being equipped with first ladder section, second ladder section and third ladder section on main hub, first ladder section, second ladder section and third ladder section are opposite to the outer surface of drive motor and set up, can let centrifugal impeller and the structure arrangement of drive motor be more compact, to let the use performance and service life of drive motor get the promotion, still can reduce the shelter of main hub to the air inlet, promote the air volume, reduce the operating noise.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal impeller technology, and in particular to a centrifugal impeller, a centrifugal fan, and an air conditioner. Background Technology

[0002] In related technologies, air conditioners utilize centrifugal fans to adjust airflow direction during operation. However, because the hub obstructs airflow, periodic air pressure pulsations can occur during centrifugal fan operation, generating fan rotation noise. Furthermore, dust in the airflow can enter the drive motor through the centrifugal fan, affecting its performance and lifespan. Therefore, increasing the centrifugal fan's airflow, reducing operating noise, and improving output performance are crucial. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a centrifugal impeller with a stepped portion comprising multiple stepped segments. These segments can fit snugly against the outer surface of a drive motor, reducing the likelihood of dust and moisture entering the motor, thus extending its service life. Furthermore, the impeller provides greater airflow capacity during use, increasing airflow rate and improving performance, while also reducing operating noise.

[0004] Another objective of this invention is to provide a centrifugal fan, wherein the centrifugal fan is provided with a centrifugal impeller as shown above.

[0005] Another objective of this invention is to provide an air conditioner that includes the centrifugal fan shown above.

[0006] According to an embodiment of the present invention, the centrifugal impeller has an inlet side and an outlet side. The inlet side is located on one side of the centrifugal impeller in the axial direction, and the outlet side is located on the outer periphery of the centrifugal impeller. Airflow enters from the inlet side, is driven by the centrifugal impeller, and is discharged from the outlet side. The centrifugal impeller includes: a central disk assembly, a main hub, a chassis, blades, and a frame. The central disk assembly is used to connect to a drive motor. The main hub is located on the outer periphery of the central disk assembly and has a stepped portion, which is opposite to the drive motor. The chassis is connected to the outer periphery of the main hub. The blades are connected to the outer periphery of the chassis, and a plurality of blades are circumferentially spaced, with the outlet side formed on the outer periphery of the blades. A frame is disposed on the side of the blades facing away from the chassis, and the same end of multiple blades facing away from the chassis is connected to the frame. The stepped portion includes: a first stepped segment, a second stepped segment, and a third stepped segment. The first stepped segment is connected to the outer periphery of the central disk assembly; the second stepped segment is connected to the outer periphery of the first stepped segment, and the projection position of the second stepped segment in the axial direction of the centrifugal impeller is lower than the projection position of the first stepped segment in the axial direction of the centrifugal impeller; the third stepped segment is connected to the outer periphery of the second stepped segment, and the projection position of the third stepped segment in the axial direction of the centrifugal impeller is lower than the projection position of the second stepped segment in the axial direction of the centrifugal impeller. The chassis is connected to the outer periphery of the third stepped segment.

[0007] According to the centrifugal fan of this embodiment, the first, second, and third stepped sections on the main hub are arranged opposite to the outer surface of the drive motor. This allows for a more compact arrangement of the centrifugal impeller and the drive motor, preventing dust and moisture from entering the drive motor and affecting its operation. This improves the performance and lifespan of the drive motor, thereby enhancing the output performance of the centrifugal fan. Simultaneously, the close fit between the centrifugal impeller and the drive motor reduces the obstruction of the air intake by the main hub, increasing airflow space and thus increasing air volume. Furthermore, it avoids the generation of periodic pressure pulsations, reducing operating noise.

[0008] In some embodiments, the first step segment includes: a first top surface and a first side surface, the first top surface being disposed on the outer side of the mid-plate assembly; the first side surface being disposed on the outer periphery of the first top surface, and the first side surface extending toward the drive motor along the connection between the first top surface and the first side surface, the first side surface and the first top surface forming a first receiving portion, at least a portion of the drive motor being disposed within the first receiving portion.

[0009] In some embodiments, the first stepped section is adapted to include a first top surface and a first side surface, the first top surface being connected to the outer periphery of the intermediate disk assembly, and the first side surface being connected to the outer periphery of the first top surface, so that the first top surface and the first side surface form a first receiving portion, so that the first receiving portion is adapted to correspondingly accommodate a waterproof cover, thereby achieving a compact design between the centrifugal impeller and the drive motor. In some specific embodiments, the extension length of the first top surface and the extension length of the first side surface need to be specifically designed according to the drive motor and the waterproof cover at the power output end of the drive motor.

[0010] In some embodiments, the second step segment includes: a second top surface and a second side surface, the second top surface being connected to the outer periphery of the first step segment; the second side surface being connected to the outer periphery of the second top surface, and the second side surface extending toward the drive motor along the connection between the second top surface and the second side surface, the second side surface and the second top surface forming a second receiving portion, at least another portion of the drive motor being disposed within the second receiving portion.

[0011] In some embodiments, the second step is adapted to include a second top surface and a second side surface, with the second top surface connected to the outer periphery of the first step and the second side surface connected to the outer periphery of the second top surface, so that the second top surface and the second side surface together form a second receiving portion. This second receiving portion can, as designed, shield the motor body to prevent the intrusion of dust and impurities, thereby improving the service life and performance of the centrifugal fan. In some specific embodiments, the extension length of the second top surface and the extension length of the second side surface need to be specifically designed according to the drive motor.

[0012] In some embodiments, the second step section is further provided with a plurality of openings, the plurality of openings being spaced apart, and at least a portion of the openings being provided on the second top surface, and at least another portion of the openings being provided on the second side surface.

[0013] In some embodiments, during the construction of the second step, it is suitable to form multiple openings on the second step to save materials, and the airflow entering the centrifugal impeller can flow through the openings, thereby increasing the airflow of the centrifugal impeller and improving the output performance of the centrifugal fan.

[0014] In some embodiments, the number of openings is A, and the number A satisfies the relationship: 3≤A≤6.

[0015] In some embodiments, during the design of the centrifugal impeller, it is suitable to arrange the implementation scheme of this application in centrifugal impellers with a variety of hubs, including but not limited to three-bladed, four-bladed, five-bladed, and six-bladed centrifugal impellers, so that the technical solution of this application can be adjusted and arranged in different technical solutions according to needs, thereby improving the applicability of this application.

[0016] In some embodiments, the centrifugal impeller further includes: a reinforcing portion, wherein there are multiple reinforcing portions and the multiple reinforcing portions are spaced apart along the circumferential direction of the middle disk assembly, the cross-section of the reinforcing portion is triangular, and a flow guiding channel is formed between adjacent reinforcing portions, one end of the reinforcing portion is connected to the middle disk assembly, and the other end of the reinforcing portion is connected to the main hub.

[0017] In some embodiments, the centrifugal impeller is also adapted to include a reinforcing section during its construction. One end of the reinforcing section is connected to the central disk assembly, and the other end is connected to the main hub. This allows the reinforcing section to correspondingly increase the connection strength between the central disk assembly and the main hub, thereby enhancing the structural strength of the centrifugal impeller, meeting the usage requirements of the centrifugal fan, and enabling a higher output speed, thus improving the performance of the centrifugal fan. Furthermore, by constructing the cross-section of the reinforcing section into a triangle, the two right-angled sides are adapted to connect to the central disk assembly and the main hub respectively to increase strength, while the hypotenuse is adapted to guide the airflow, increasing flow efficiency. Similarly, the guide channel constructed between adjacent reinforcing sections is adapted to guide the airflow introduced from the inlet side. During the airflow along the central disk assembly to the main hub, the guide channel increases airflow efficiency, thereby increasing the output performance of the centrifugal fan. The more efficient airflow outflow also avoids the generation of eddies, reducing operating noise.

[0018] The centrifugal fan according to an embodiment of the present invention includes: a centrifugal impeller as described above and the drive motor.

[0019] According to the centrifugal fan of this utility model embodiment, by providing a centrifugal impeller as shown above inside the centrifugal fan, and due to the first, second, and third stepped sections provided on the main hub, which are arranged opposite to the outer surface of the drive motor, the structure of the centrifugal impeller and the drive motor can be more compact. This prevents dust and moisture from entering the drive motor and affecting its use, thereby improving the performance and service life of the drive motor and thus enhancing the output performance of the centrifugal fan. Simultaneously, the close fit between the centrifugal impeller and the drive motor reduces the obstruction of the main hub by the air inlet, increases the airflow space, thereby increasing the air volume, and avoids the generation of periodic pressure pulsations, reducing operating noise.

[0020] In some embodiments, the drive motor includes: a motor body and a waterproof cover, wherein the motor body is provided with a power output end; the waterproof cover is sleeved on the outside of the power output end, the first stepped section is sleeved on the outside of the waterproof cover, and the second stepped section is sleeved on the outside of the motor body.

[0021] In some embodiments, it is suitable to fit the stepped structure of the drive motor, specifically, the first stepped section is fitted onto the outside of the waterproof cover and the second stepped section is fitted onto the outside of the motor body, so as to achieve a fitted design between the stepped section and the drive motor, thereby achieving a compact design of the centrifugal motor, which can prevent foreign objects from entering the drive motor, improve performance and service life, and allow the centrifugal impeller to have a higher air volume. While increasing the air volume, it can also achieve quiet operation of the centrifugal fan.

[0022] In some embodiments, the drive motor further includes: a first fixing member, wherein the middle disk assembly is provided with a limiting groove, and the first fixing member is disposed in the limiting groove to fix the drive motor and the centrifugal impeller; and a second fixing member, wherein the second fixing member is disposed at the power output end, and the second fixing member is located on the side of the middle disk assembly opposite to the first fixing member, and the second fixing member and the first fixing member fix the centrifugal impeller to the power output end from both sides of the middle disk assembly.

[0023] In some embodiments, during the assembly of the centrifugal fan, it is suitable to connect the centrifugal impeller and the drive motor via a fastener. To make the assembly between the centrifugal impeller and the drive motor more reliable, it is suitable to form a limiting groove on the intermediate plate assembly. The first fastener is adapted to connect with the power output end within the limiting groove for simpler fixation. Furthermore, a second fastener is provided at the power output end. The first and second fasteners fix the power output end from both sides of the intermediate plate assembly, thereby improving the reliability of the connection between the centrifugal impeller and the drive motor. The power output of the drive motor can be transmitted to the centrifugal impeller as designed, thus improving the output performance of the centrifugal fan.

[0024] An air conditioner according to an embodiment of the present invention includes: a centrifugal fan as described above.

[0025] According to the embodiment of this utility model, the air conditioner is equipped with a centrifugal fan as shown above. The first, second, and third stepped sections on the main hub are arranged opposite to the outer surface of the drive motor. This allows for a more compact arrangement of the centrifugal impeller and the drive motor, preventing dust and moisture from entering the drive motor and affecting its operation. This improves the performance and lifespan of the drive motor, thereby enhancing the output performance of the centrifugal fan. Simultaneously, the close fit between the centrifugal impeller and the drive motor reduces the obstruction of the air intake by the main hub, increasing airflow space and thus increasing air volume. Furthermore, it avoids the generation of periodic pressure pulsations, reducing operating noise.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic diagram of the structure of a centrifugal fan according to an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of the structure of a centrifugal fan according to an embodiment of the present utility model;

[0030] Figure 3 This is a schematic diagram of the structure of a centrifugal fan according to an embodiment of the present utility model;

[0031] Figure 4 This is a structural schematic diagram of a centrifugal fan according to another perspective of an embodiment of the present utility model;

[0032] Figure 5 This is a cross-sectional schematic diagram of a centrifugal fan according to an embodiment of the present utility model;

[0033] Figure 6 This is a partial structural schematic diagram of a centrifugal fan according to an embodiment of the present utility model;

[0034] Figure 7 This is a schematic diagram of the structure of a centrifugal impeller according to an embodiment of the present utility model;

[0035] Figure 8 This is a schematic diagram of the structure of a centrifugal impeller according to an embodiment of the present utility model;

[0036] Figure 9 This is a cross-sectional schematic diagram of a centrifugal impeller according to an embodiment of the present utility model;

[0037] Figure 10 This is a schematic diagram of the structure of a centrifugal impeller according to an embodiment of the present utility model;

[0038] Figure label:

[0039] Centrifugal fan 10,

[0040] Drive motor 100, power output end 101, motor body 110, waterproof cover 120.

[0041] Centrifugal impeller 200,

[0042] Mid-disk component 210, limit slot 211,

[0043] Main hub 220, hub section 221,

[0044] Chassis 230,

[0045] 240 leaves

[0046] 250mm border

[0047] Stepped section 260, first stepped section 261, first top surface 2611, first side surface 2612, first receiving section 2613, second stepped section 262, second top surface 2621, second side surface 2622, second receiving section 2623, opening 2624, third stepped section 263.

[0048] Reinforcement section 270, diversion channel 271,

[0049] First fastener 281, second fastener 282

[0050] Air duct 300. Detailed Implementation

[0051] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0052] The following is for reference. Figures 1-10 According to an embodiment of the present utility model, the centrifugal impeller 200 is provided with an air inlet side and an air outlet side. The air inlet side is provided on one side of the centrifugal impeller 200 in the axial direction, and the air outlet side is provided on the outer periphery of the centrifugal impeller 200. The airflow enters from the air inlet side, is driven by the centrifugal impeller 200, and is discharged from the air outlet side.

[0053] It should be noted that during the use of the air conditioner, it is suitable to construct a centrifugal fan 10 so that the airflow can be introduced from the middle side of the centrifugal fan 10 and discharged from the periphery of the centrifugal fan 10. The direction of airflow can be adjusted by the centrifugal fan 10, so that the airflow can be adjusted by the centrifugal fan 10 during the use of the air conditioner, so that the airflow can flow according to the design and act on the designated position to complete the subsequent circulation requirements, thereby realizing the airflow circulation needs in the air conditioner and enabling the air conditioner to be used as designed.

[0054] In related technologies, during the use of a centrifugal fan 10, an air inlet side is formed in the middle of the centrifugal fan 10, and an air outlet side is provided around the periphery of the centrifugal fan 10. Airflow is introduced through the air inlet side and circulates within the centrifugal fan 10, then is thrown out by the centrifugal action of the centrifugal impeller 200 and discharged from the air outlet side of the centrifugal impeller 200. However, in the prior art, the structural design within the centrifugal fan 10 makes it easy for the airflow to collide with the internal structure of the centrifugal impeller 200 and form vortices during airflow. This not only generates noise but also affects airflow, thus impacting the performance of the centrifugal fan 10.

[0055] Therefore, this application provides a centrifugal fan 10, suitable for including a drive motor 100 and a centrifugal impeller 200. The drive motor 100 is adapted to provide driving force to drive the centrifugal impeller 200, so that the centrifugal impeller 200 can rotate and drive the airflow centrifugally discharged, thereby realizing the airflow drive of the centrifugal fan 10. Specifically, the centrifugal impeller 200 is adapted to be connected to the power output end 101 of the drive motor 100, so that the driving force of the drive motor 100 can be directly applied to the centrifugal impeller 200 to drive the centrifugal impeller 200 to rotate, thereby realizing the working requirements of the centrifugal fan 10. The centrifugal fan 10 is disposed in the air duct 300 so that the airflow driven by the centrifugal fan 10 can be adapted to circulate within the air duct 300.

[0056] Specifically, the centrifugal impeller 200 includes: a central disk assembly 210, a main hub 220, a chassis 230, blades 240, and a frame 250. The central disk assembly 210 is connected to the drive motor 100, and the driving force of the drive motor 100 is applied to the central disk assembly 210. The main hub 220 is located on the outer periphery of the central disk assembly 210, and a stepped portion 260 is provided on the main hub 220. The stepped portion 260 is arranged opposite to the drive motor 100, and the airflow continues to flow after passing through the outer side of the central disk assembly 210 and the outer side of the main hub 220 in sequence. The chassis 230 is connected to the outer periphery of the main hub 220. The blades 240 are connected to the outer periphery of the chassis 230, and multiple blades 240 are arranged circumferentially at intervals, with the air outlet side formed on the outer periphery of the blades 240. The frame 250 is located on the side of the blades 240 away from the chassis 230, and the same end of multiple blades 240 away from the chassis 230 is connected to the frame 250.

[0057] In other words, the centrifugal impeller 200 in this application is adapted to include a central disk assembly 210, a main hub 220, a chassis 230, blades 240, and a frame 250. The central disk assembly 210 is adapted to be connected to the power output end 101 of the drive motor 100 so that the power output of the drive motor 100 can be directly applied to the centrifugal impeller 200 to drive the centrifugal impeller 200 to rotate. Since the central disk assembly 210 is adapted to be connected to the main hub 220, the driving action is adapted to be transmitted through the main hub 220 and through the chassis 230 to the blades 240, ultimately determining that the blades 240 rotate so that the blades 240 can drive the airflow to be discharged from the centrifugal impeller 200 in a centrifugal direction. The frame 250 on the other side of the blades 240 is adapted to fix the blades 240 together with the chassis 230.

[0058] In actual use, the hub of the centrifugal impeller 200 is suitable for covering the outside of the drive motor 100. Because the hub obstructs airflow, periodic air pressure pulsations are likely to occur during the operation of the centrifugal fan 10, resulting in rotational noise. Simultaneously, dust in the airflow can enter the drive motor 100 through the centrifugal fan 10, affecting the motor's performance and lifespan. Therefore, increasing the airflow of the centrifugal fan 10 and reducing operating noise is crucial.

[0059] Therefore, this application provides a centrifugal impeller 200 with a stepped main hub 220, allowing the main hub 220 to fit snugly over the outside of the drive motor 100. This results in a more compact fit between the main hub 220 and the drive motor 100, preventing the hub from obstructing airflow and reducing the intensity of periodic air pressure pulsations during the operation of the centrifugal fan 10, thus lowering the rotational noise generated during operation. Simultaneously, the tighter fit between the main hub 220 and the drive motor 100 also prevents dust and moisture from being transferred into the drive motor 100, improving its performance and lifespan. Furthermore, the closer fit between the centrifugal impeller 200 and the drive motor 100 allows for a larger airflow rate, enhancing the output performance of the centrifugal fan 10.

[0060] The main hub 220 includes a first stepped section 261, a second stepped section 262, and a third stepped section 263. The first stepped section 261 is connected to the outer periphery of the intermediate plate assembly 210. The second stepped section 262 is connected to the outer periphery of the first stepped section 261, and the projection position of the second stepped section 262 in the axial direction of the centrifugal impeller 200 is lower than the projection position of the first stepped section 261 in the axial direction of the centrifugal impeller 200. The third stepped section 263 is connected to the outer periphery of the second stepped section 262, and the projection position of the third stepped section 263 in the axial direction of the centrifugal impeller 200 is lower than the projection position of the second stepped section 262 in the axial direction of the centrifugal impeller. The chassis 230 is connected to the outer periphery of the third stepped section 263.

[0061] In other words, the stepped main hub 220 is suitable to sequentially include a first stepped section 261, a second stepped section 262, and a third stepped section 263. Specifically, the first stepped section 261 is connected to the outer periphery of the central assembly 210, the second stepped section 262 is connected to the outer periphery of the first stepped section 261, and the third stepped section 263 is connected to the outer periphery of the second stepped section 262, thus forming the stepped design of the main hub 220. Furthermore, the horizontal height of the second stepped section 262 is set below the first stepped section 261, and the horizontal height of the third stepped section 263 is set below the first stepped section 261, so that the centrifugal impeller 200 can conform to the structural arrangement of the drive motor 100, allowing the centrifugal impeller 200 to shield the drive motor 100.

[0062] According to the centrifugal fan 10 of this utility model embodiment, the first stepped section 261, the second stepped section 262, and the third stepped section 263 provided on the main hub 220 are arranged opposite to the outer surface of the drive motor 100. This allows for a more compact structural arrangement between the centrifugal impeller 200 and the drive motor 100, preventing dust and moisture from entering the drive motor 100 and affecting its use. This improves the performance and service life of the drive motor 10, thereby enhancing the output performance of the centrifugal fan 10. Simultaneously, the close fit between the centrifugal impeller 200 and the drive motor 100 reduces the obstruction of the main hub 220 by the air inlet, increasing the airflow space and thus increasing the air volume. Furthermore, it avoids the generation of periodic pressure pulsations and reduces operating noise.

[0063] In some embodiments, the first step segment 261 includes a first top surface 2611 and a first side surface 2612. The first top surface 2611 is disposed on the outer side of the mid-plate assembly 210. The first side surface 2612 is disposed on the outer periphery of the first top surface 2611 and extends towards the drive motor 100 along the connection between the first top surface 2611 and the first side surface 2612. The first side surface 2612 and the first top surface 2611 form a first receiving portion 2613. At least a portion of the drive motor 100, namely the waterproof cover 120, is disposed at least within the first receiving portion 2613.

[0064] Specifically, the first step segment 261 is adapted to include a first top surface 2611 and a first side surface 2612. The first top surface 2611 is connected to the outer periphery of the central plate assembly 210, and the first side surface 2612 is connected to the outer periphery of the first top surface 2611, so that the first top surface 2611 and the first side surface 2612 form a first receiving portion 2613, so that the first receiving portion 2613 is adapted to correspondingly accommodate a waterproof cover 120, thereby achieving a compact design between the centrifugal impeller 200 and the drive motor 100. In some specific embodiments, the extension length of the first top surface 2611 and the extension length of the first side surface 2612 need to be specifically designed according to the drive motor 100 and the waterproof cover 120 of the power output end 101 of the drive motor 100.

[0065] In some embodiments, the second step segment 262 includes: a second top surface 2621 and a second side surface 2622, the second top surface 2621 being connected to the outer periphery of the first step segment 261; the second side surface 2622 being connected to the outer periphery of the second top surface 2621, and the second side surface 2622 extending toward the drive motor 100 along the connection between the second top surface 2621 and the second side surface 2622, the second side surface 2622 and the second top surface 2621 forming a second receiving portion 2623, at least another part of the drive motor 100, namely the motor body 110, is disposed within the second receiving portion 2623.

[0066] It is understood that the second step segment 262 is adapted to include a second top surface 2621 and a second side surface 2622, with the second top surface 2621 connected to the outer periphery of the first step segment 261 and the second side surface 2622 connected to the outer periphery of the second top surface 2621, so that the second top surface 2621 and the second side surface 2622 together form a second receiving portion 2623. This allows the second receiving portion 2623 to shield the motor body 110 as designed, preventing the intrusion of dust and impurities and improving the service life and performance of the centrifugal fan 10. In some specific embodiments, the extension length of the second top surface 2621 and the extension length of the second side surface 2622 need to be specifically designed according to the drive motor 100.

[0067] In some embodiments, the second step section 262 is further provided with a plurality of openings 2624, which are spaced apart, with at least a portion of the openings 2624 located on the second top surface 2621 and at least another portion located on the second side surface 2622. It is understood that during the construction of the second step section 262, it is suitable to form a plurality of openings 2624 on the second step section 262 to save material, and the airflow entering the centrifugal impeller 200 can circulate through the openings 2624, thereby increasing the airflow of the centrifugal impeller 200 and improving the output performance of the centrifugal fan 10.

[0068] In some embodiments, a plurality of hub portions 221 are formed on the main hub 220, and adjacent hub portions 221 are separated by openings 2624. That is, in this application, it is suitable to form a plurality of hub portions 221 so that openings 2624 are constructed between adjacent hub portions 221, thereby making the position between the main hub 220 and the drive motor 100 more compact, thereby increasing the airflow within the centrifugal impeller 200 and improving the output performance of the centrifugal fan 10.

[0069] In some embodiments, the number of openings 2624 is A, and the number of hub portions 221 is B, where the number A and the number B satisfy the relationship: 3 ≤ A = B ≤ 6. It is understood that, in the design process of the centrifugal impeller 200, it is suitable to arrange the embodiments of this application in centrifugal impellers 200 with various numbers of hub portions 221, including but not limited to three-bladed, four-bladed, five-bladed, and six-bladed centrifugal impellers 200, so that the technical solutions of this application can be adjusted and arranged in different technical solutions according to requirements, thereby improving the applicability of this application.

[0070] In some embodiments, the centrifugal impeller 200 further includes: a reinforcing portion 270, wherein there are multiple reinforcing portions 270 and the multiple reinforcing portions 270 are spaced apart along the circumferential direction of the central disk assembly 210, the cross section of the reinforcing portion 270 is triangular, and a flow guide channel 271 is formed between adjacent reinforcing portions 270, one end of the reinforcing portion 270 is connected to the central disk assembly 210, and the other end of the reinforcing portion 270 is connected to the main hub 220, and the reinforcing portion 270 is used to improve the structural strength between the central disk assembly 210 and the main hub 220. It is understandable that during the construction of the centrifugal impeller 200, a reinforcing part 270 is also suitable. Since one end of the reinforcing part 270 is connected to the central disk assembly 210 and the other end of the reinforcing part 270 is connected to the main hub 220, the reinforcing part 270 can correspondingly improve the connection strength between the central disk assembly 210 and the main hub 220, thereby improving the structural strength of the centrifugal impeller 200, meeting the usage requirements of the centrifugal fan 10, and having a higher output speed, so as to improve the performance of the centrifugal fan 10. Furthermore, by constructing the cross-section of the reinforcing part 270 into a triangle, the two right-angled sides are adapted to connect with the middle plate assembly 210 and the main hub 220 respectively to enhance strength, while the hypotenuse is adapted to guide the airflow to increase flow efficiency. Similarly, the guide channel 271 constructed between adjacent reinforcing parts 270 is adapted to guide the airflow introduced from the air inlet side. During the airflow along the middle plate assembly 210 to the main hub 220, the guide channel 271 can increase the airflow efficiency, thereby increasing the output performance of the centrifugal fan 10. Moreover, the more efficient airflow can avoid the generation of eddies and reduce operating noise.

[0071] The centrifugal fan 10 according to an embodiment of the present invention includes: a centrifugal impeller 200 as described above and a drive motor 100. Thus, by providing the centrifugal impeller 200 as shown above within the centrifugal fan 10, and considering the first stepped section 261, the second stepped section 262, and the third stepped section 263 provided on the main hub 220, which are arranged opposite to the outer surface of the drive motor 100, the structural arrangement of the centrifugal impeller 200 and the drive motor 100 can be made more compact. This prevents dust and moisture from entering the drive motor 100 and affecting its use, thereby improving the performance and service life of the drive motor 100, and thus enhancing the output performance of the centrifugal fan 10. Simultaneously, the close fit between the centrifugal impeller 200 and the drive motor 100 reduces the obstruction of the main hub 220 by the air inlet, increases the airflow space, thereby increasing the air volume, and avoids the generation of periodic pressure pulsations, reducing operating noise.

[0072] In some embodiments, the centrifugal impeller 200 is disposed at the power output end 101 of the drive motor 100. The drive motor 100 includes a motor body 110 and a waterproof cover 120. The motor body 110 is provided with the power output end 101. The waterproof cover 120 is sleeved on the outside of the power output end 101. The waterproof cover 120 is used to prevent water from entering the motor body 110 from the power output end 101. A first stepped section 261 is sleeved on the outside of the waterproof cover 120, and a second stepped section 262 is sleeved on the outside of the motor body 110.

[0073] Understandably, the drive motor 100 is adapted to include a motor body 110 and a waterproof cover 120. The waterproof cover 120 is positioned at the power output end 101 of the motor body 110 to shield the power output end 101, reducing the entry of dust and impurities into the drive motor 100 through the power output end 101 and improving reliability. Simultaneously, the stepped portion 260 is adapted to fit the drive motor 100. Specifically, the first stepped section 261 is fitted onto the outside of the waterproof cover 120, and the second stepped section 262 is fitted onto the outside of the motor body 110, achieving a close fit between the stepped portion 260 and the drive motor 100. This results in a compact design for the centrifugal motor, preventing debris from entering the drive motor 100, improving performance and lifespan, and allowing the centrifugal impeller 200 to have a higher airflow. While increasing airflow, the centrifugal fan 10 also operates quietly.

[0074] In some embodiments, the centrifugal fan 10 further includes: a first fixing member 281, a limiting groove 211 provided on the middle plate assembly 210, an external thread provided on the outer peripheral wall of the power output end 101, the first fixing member 281 being threadedly connected to the power output end 101, the first fixing member 281 being disposed in the limiting groove 211 to connect the drive motor 100 and the centrifugal impeller 200; and a second fixing member 282, the second fixing member 282 being disposed on the power output end 101, and the second fixing member 282 being located on the side of the middle plate assembly 210 away from the first fixing member 281, the second fixing member 282 and the first fixing member 281 fixingly connecting the centrifugal impeller 200 to the power output end 101 from both sides of the middle plate assembly 210. Understandably, during the assembly of the centrifugal fan 10, it is suitable to connect the centrifugal impeller 200 and the drive motor 100 via the first fixing member 281. To make the assembly between the centrifugal impeller 200 and the drive motor 100 more reliable, a limiting groove 211 is formed on the intermediate plate assembly 210. The first fixing member 281 is then easily fixed by connecting to the power output end 101 within the limiting groove 211. Furthermore, a second fixing member 282 is provided on the power output end 101. The first fixing member 281 and the second fixing member 282 fix the power output end 101 from both sides of the intermediate plate assembly 210, thereby improving the reliability of the connection between the centrifugal impeller 200 and the drive motor 100. This ensures that the power output of the drive motor 100 is transmitted to the centrifugal impeller 200 as designed, thus improving the output performance of the centrifugal fan 10.

[0075] An air conditioner according to an embodiment of the present invention includes a centrifugal fan 10 as described above. It is understood that during the use of the air conditioner, airflow is introduced into the air conditioner for heat exchange and then circulates. During the airflow, the centrifugal fan 10 is used to drive the airflow, allowing it to circulate as designed and exit from the air outlet of the air conditioner. This allows the heat-exchanged airflow to act on the indoor environment, thereby improving indoor environmental quality.

[0076] In this application, the air conditioner performs a refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0077] The compressor compresses refrigerant gas under high temperature and pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0078] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve, returning the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0079] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0080] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0081] According to the embodiment of this utility model, the air conditioner is equipped with a centrifugal fan 10 as shown above. The first step 261, second step 262, and third step 263 on the main hub 220 are arranged opposite to the outer surface of the drive motor 100. This allows for a more compact arrangement of the centrifugal impeller 200 and the drive motor 100, preventing dust and moisture from entering the drive motor 100 and affecting its operation. This improves the performance and lifespan of the drive motor 10, thereby enhancing the output performance of the centrifugal fan 10. Simultaneously, the close fit between the centrifugal impeller 200 and the drive motor 100 reduces the obstruction of the main hub 220 by the air intake, increasing airflow space and thus increasing air volume. Furthermore, it avoids the generation of periodic pressure pulsations, reducing operating noise.

[0082] Other components and operations of the air conditioner according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0084] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A centrifugal impeller, wherein the centrifugal impeller is provided with an air inlet side and an air outlet side, the air inlet side is provided on one side of the centrifugal impeller in the axial direction, and the air outlet side is provided on the outer periphery of the centrifugal impeller, wherein airflow enters from the air inlet side, is driven by the centrifugal impeller, and is discharged from the air outlet side; Its features are, The centrifugal impeller includes: A mid-plate assembly, the mid-plate assembly being used for connection to a drive motor; The main hub is located on the outer periphery of the center plate assembly, and a stepped portion is provided on the main hub, which is disposed opposite to the drive motor; A chassis connected to the outer periphery of the main wheel hub; The blades are connected to the outer periphery of the chassis, and a plurality of the blades are circumferentially spaced apart, with the air outlet side formed on the outer periphery of the blades; A frame is provided on the side of the blade facing away from the chassis, and the same end of the plurality of blades facing away from the chassis is connected to the frame; The stepped section includes: The first step segment is connected to the outer periphery of the mid-plate assembly; The second step is connected to the outer periphery of the first step, and the projection position of the second step in the axial direction of the centrifugal impeller is lower than the projection position of the first step in the axial direction of the centrifugal impeller. The third step is connected to the outer periphery of the second step, and the projection position of the third step in the axial direction of the centrifugal impeller is lower than the projection position of the second step in the axial direction of the centrifugal impeller. The chassis is connected to the outer periphery of the third step.

2. The centrifugal impeller according to claim 1, characterized in that, The first step segment includes: A first top surface, which is located on the outer side of the middle plate assembly; A first side surface is located on the outer periphery of the first top surface, and the first side surface extends toward the drive motor along the connection between the first top surface and the first side surface. The first side surface and the first top surface form a first receiving portion, and at least a portion of the drive motor is disposed within the first receiving portion.

3. The centrifugal impeller according to claim 2, characterized in that, The second step includes: The second top surface is connected to the outer periphery of the first stepped segment; The second side is connected to the outer periphery of the second top surface, and the second side extends toward the drive motor along the connection between the second top surface and the second side. The second side and the second top surface form a second receiving portion, and at least another part of the drive motor is disposed in the second receiving portion.

4. The centrifugal impeller according to claim 3, characterized in that, The second step section is also provided with a plurality of openings, which are spaced apart, and at least a portion of the openings are provided on the second top surface, and at least another portion of the openings are provided on the second side surface.

5. The centrifugal impeller according to claim 4, characterized in that, The number of openings is A, and the number A satisfies the relationship: 3≤A≤6.

6. The centrifugal impeller according to claim 1, characterized in that, Also includes: The reinforcing part is a plurality of such reinforcing parts, which are spaced apart along the circumferential direction of the mid-plate assembly. The cross-section of the reinforcing part is triangular, and a guide channel is formed between adjacent reinforcing parts. One end of the reinforcing part is connected to the mid-plate assembly, and the other end of the reinforcing part is connected to the main wheel hub.

7. A centrifugal fan, characterized in that, include: The centrifugal impeller and the drive motor as described in any one of claims 1-6.

8. The centrifugal fan according to claim 7, characterized in that, The drive motor includes: The motor body is provided with a power output terminal. A waterproof cover is fitted over the outside of the power output end, the first stepped section is fitted over the outside of the waterproof cover, and the second stepped section is fitted over the outside of the motor body.

9. The centrifugal fan according to claim 7, characterized in that, Also includes: The first fixing member is provided with a limiting groove on the middle plate assembly, and the first fixing member is disposed in the limiting groove to fix the drive motor and the centrifugal impeller in a fixed connection. The second fixing member is disposed on the drive motor and is located on the side of the middle plate assembly opposite to the first fixing member. The second fixing member and the first fixing member fix the centrifugal impeller to the drive motor from both sides of the middle plate assembly.

10. An air conditioner, characterized in that, include: The centrifugal fan as described in any one of claims 7-9.

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