Centrifugal impeller, centrifugal fan and air conditioner

Abstract

The utility model discloses a centrifugal impeller, centrifugal fan and air conditioner, centrifugal impeller includes: middle disc subassembly, main wheel hub, bottom disc, blade and frame, middle disc subassembly includes: middle disc and deputy wheel hub, and middle disc is connected with driving motor, and deputy wheel hub is connected in the outer periphery side of middle disc, and main wheel hub is connected in the outer periphery side of deputy wheel hub. Since middle disc subassembly is suitable for including middle disc and deputy wheel hub, when the airflow is circulated in the centrifugal impeller, it is suitable for circulating through the outer surface of middle disc, deputy wheel hub and main wheel hub, so that the vortex flow formed on the middle disc is obviously reduced, thereby reducing the influence of vortex on the airflow circulation, improving the use performance of the centrifugal impeller, and at the same time, due to the reduction of vortex flow, the noise generated in the airflow circulation process is reduced, so that the use of the centrifugal impeller is more quiet.

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 are designed to adjust the airflow direction using a centrifugal impeller during operation. However, in existing technologies, the internal structure of the centrifugal impeller is designed such that the airflow easily collides with the impeller's internal structure, creating vortices. This not only generates noise but also hinders airflow, thus affecting the impeller's performance. 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, wherein a main hub and a secondary hub are provided within the impeller. This design allows airflow to pass sequentially through the outer surfaces of the central disc, the secondary hub, and the main hub for buffering, thereby bringing the central disc closer to the air inlet side to reduce eddy current flow, facilitating airflow, improving performance, and reducing noise generated during airflow.

[0004] Another objective of this invention is to provide an air conditioner in which a centrifugal impeller as shown above is provided.

[0005] 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. 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. The frame is located on the side of the blades 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 central disk assembly includes: a central disk and a secondary hub. The central disk is connected to the drive motor. The secondary hub is connected to the outer periphery of the central disk, and the main hub is connected to the outer periphery of the secondary hub.

[0006] According to the centrifugal impeller of this utility model embodiment, since the middle disk assembly is adapted to include a middle disk and an auxiliary hub, when the airflow enters the centrifugal impeller for circulation, it is adapted to circulate through the outer surfaces of the middle disk, the auxiliary hub and the main hub, so that the vortex flow rate formed on the middle disk is significantly reduced, thereby reducing the influence of the vortex on the airflow and improving the performance of the centrifugal impeller. At the same time, due to the reduction of the vortex flow rate, the noise generated during the airflow process is reduced, so that the centrifugal impeller is used more quietly.

[0007] In some embodiments, the outer surface of the main hub is constructed as a convex arc; and / or the outer surface of the secondary hub is constructed as a convex arc, wherein the bending radius of the main hub is greater than the bending radius of the secondary hub.

[0008] In some embodiments, during the airflow process, it is suitable to flow over the outer surfaces of the main hub and the auxiliary hub. Therefore, it is suitable to set the outer surfaces of the main hub and the auxiliary hub as convex arcs so that the airflow is conducive to the airflow process, reducing or even avoiding the generation of eddies. While improving the performance of the centrifugal impeller, it can also reduce the noise generated during operation, so as to achieve the silent use of the centrifugal impeller.

[0009] In some embodiments, the extension height of the auxiliary hub in the axial direction of the centrifugal impeller is A, and the extension height of the centrifugal impeller in the axial direction of the centrifugal impeller is B. The heights A and B satisfy the relationship: 0.05≤A / B≤0.3.

[0010] In some embodiments, the vertical height of the auxiliary hub is set to A, and the vertical height of the centrifugal impeller is set to B. To avoid the auxiliary hub being too high and reducing the air intake of the centrifugal impeller, and also to avoid the auxiliary hub being too low and generating too many vortices that affect the use of the centrifugal impeller, the ratio of the vertical height of the auxiliary hub to the vertical height of the centrifugal impeller is set between 0.05 and 0.3. This ensures that the auxiliary hub has sufficient vertical height and a relatively high outer surface area to guide the airflow, allowing the airflow to circulate better within the centrifugal impeller. This smoother airflow within the centrifugal impeller reduces the generated vortex flow, allowing the airflow to be discharged from the centrifugal impeller as designed, increasing the centrifugal impeller's output air volume, and thus improving the performance of the centrifugal impeller.

[0011] In some embodiments, the distance between the outer surface of the middle plate and the air inlet side is C, and the height B and the distance C satisfy the relationship: 0 < C / B ≤ 0.5.

[0012] In some embodiments, the distance between the outer surface of the central plate and the air inlet side is set to C, so that there is a certain distance between the outer surface of the central plate and the air inlet side, thereby allowing the air inlet side of the centrifugal impeller to have a better contact area to introduce airflow, increase the airflow entering the centrifugal impeller, and thus improve the performance of the centrifugal impeller. Therefore, the ratio between the distance between the outer surface of the central plate and the air inlet side and the vertical height of the centrifugal impeller is greater than or equal to 0.5, so that the influence of the central plate's setting position on the air inlet is reduced, thereby ensuring sufficient performance of the centrifugal impeller during use. At the same time, the top surface area of ​​the central plate is relatively small, resulting in relatively fewer vortices formed on the central plate by the airflow introduced into the centrifugal impeller, further improving the performance of the centrifugal impeller.

[0013] In some embodiments, the maximum projected diameter of the secondary hub in the horizontal direction is D, and the projected diameter of the centrifugal impeller in the horizontal direction is E. The diameters D and E satisfy the relationship: 0.05≤C / D≤0.3.

[0014] In some embodiments, the projected diameter of the auxiliary hub in the horizontal direction is related to its outer peripheral position connected to the central disk. The ratio of the projected diameter of the auxiliary hub in the horizontal direction to the horizontal projected diameter of the centrifugal impeller is set between 0.05 and 0.3. That is, the size of the connection section between the auxiliary hub and the outer side of the central disk is relatively small. Therefore, the outer surface area of ​​the central disk can be determined to be relatively small, so that the distance between the central disk and the air inlet side can ensure the introduction of airflow, so that the centrifugal duct air conditioner can have high performance. At the same time, the connection area between the auxiliary hub and the main hub is relatively large, so that the connection between the auxiliary hub and the main hub can better guide the airflow, so that the vortex generated by the airflow in the centrifugal impeller is relatively small, thereby improving the performance of the centrifugal impeller.

[0015] In some embodiments, the secondary hub has a first hollow portion and the main hub has a second hollow portion, the first hollow portion and the second hollow portion are connected to form a receiving portion, the receiving portion being used to receive a drive motor.

[0016] In some embodiments, the secondary hub has a first hollow portion to save on secondary hub material, and the main hub has a second hollow portion to further save on main hub material, thereby reducing the production cost of the centrifugal impeller. Furthermore, by connecting the first and second hollow portions to form a receiving portion for accommodating the drive motor, the drive motor is positioned close to the centrifugal impeller, allowing its output to directly act on the impeller, resulting in more stable and reliable output performance of the centrifugal impeller.

[0017] In some embodiments, the first hollow portion is provided with reinforcing ribs, there are multiple reinforcing ribs and they are circumferentially spaced. The reinforcing ribs radiate outward in the circumferential direction surrounding the centrifugal impeller, and one end of the reinforcing rib is connected to the inner peripheral wall of the first hollow portion.

[0018] In some embodiments, a reinforcing rib is provided in the first hollow portion. The reinforcing rib is adapted to be arranged in the first hollow portion at circumferential intervals so that the reinforcing rib is suitable for supporting the secondary hub, thereby improving the structural strength of the secondary hub and having a longer service life to meet the usage requirements of the centrifugal impeller. This allows the airflow to be guided and flow on the outer surface of the secondary hub as designed and then continue to flow to the main hub. The impact of the airflow process is relatively low, thereby improving the output performance of the centrifugal impeller.

[0019] In some embodiments, the middle plate is further provided with: a bushing, the bushing being connected to the side of the middle plate facing the drive motor, the other end of the reinforcing rib being connected to the outer periphery of the bushing, the power output end of the drive motor being provided with a shaft core, the shaft core being disposed inside the bushing; the middle plate being provided with an installation groove, the installation groove being provided with a gasket, the gasket having a through hole in its center, the shaft core passing through the through hole and connecting to the bushing.

[0020] In some embodiments, a bushing is provided on the intermediate disk. The bushing is adapted to be constructed on the side of the intermediate disk facing the drive motor, so that a shaft core located at the power output end of the drive motor can be correspondingly disposed within the bushing. This allows the bushing to protect the shaft core and provides a longer contact area, enabling the drive performance of the drive motor to better act on the intermediate disk, thereby making the performance output of the centrifugal impeller more reliable. A mounting groove is provided within the intermediate disk, which is adapted to provide a position for the installation of a shim. This allows the shim to be arranged within the intermediate disk, thereby increasing the structural strength of the intermediate disk and making the connection between the intermediate disk and the drive motor more reliable. The power output of the drive motor can act on the centrifugal impeller as designed, giving the centrifugal impeller higher performance to meet usage requirements.

[0021] The centrifugal fan according to an embodiment of the present invention includes: a centrifugal impeller as described above and the drive motor.

[0022] According to the centrifugal fan of this utility model embodiment, by providing a centrifugal impeller as shown above inside the air conditioner, since the middle disk assembly is adapted to include a middle disk and an auxiliary hub, when the airflow enters the centrifugal impeller for circulation, it is adapted to circulate through the outer surfaces of the middle disk, the auxiliary hub and the main hub, so that the vortex flow rate formed on the middle disk is significantly reduced, thereby reducing the influence of vortex on airflow and improving the performance of the centrifugal impeller. At the same time, due to the reduction of vortex flow rate, the noise generated during airflow is reduced, so that the centrifugal fan is quieter to use.

[0023] An air conditioner according to an embodiment of the present invention includes: a centrifugal fan as described above.

[0024] According to the embodiment of the present invention, the air conditioner has a centrifugal impeller as shown above inside. Since the middle disk assembly is adapted to include a middle disk and a secondary hub, when the airflow enters the centrifugal impeller, it is adapted to flow through the outer surfaces of the middle disk, the secondary hub and the main hub, so that the vortex flow rate formed on the middle disk is significantly reduced, thereby reducing the influence of the vortex on the airflow and improving the performance of the centrifugal impeller. At the same time, due to the reduction of the vortex flow rate, the noise generated during the airflow process is reduced, so that the air conditioner is quieter to use.

[0025] 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

[0026] 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: Figure 1 This is a schematic diagram of the structure of a centrifugal impeller according to an embodiment of the present utility model; Figure 2 yes Figure 1 A partial structural diagram of part A in the diagram; Figure 3 This is a schematic diagram of the structure of a centrifugal impeller according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of a centrifugal impeller according to an embodiment of the present utility model; Figure 5 yes Figure 4 A partial structural diagram of part B in the diagram; Figure 6 This is a schematic diagram of the structure of a centrifugal impeller according to an embodiment of the present utility model; Figure 7 This is a cross-sectional schematic diagram of a centrifugal impeller according to an embodiment of the present utility model; Figure 8 This is a partial structural cross-sectional schematic diagram of a centrifugal impeller according to an embodiment of the present utility model; Figure 9 This is a cross-sectional schematic diagram of a centrifugal impeller according to an embodiment of the present utility model; Figure 10 This is a partial structural cross-sectional schematic diagram of a centrifugal impeller according to an embodiment of the present utility model; Figure label: Centrifugal impeller 10, air inlet side 11, air outlet side 12. Mid-disk assembly 100, mid-disk 110, bushing 111, mounting groove 112, gasket 113, through hole 114, secondary hub 120, first hollow section 121, reinforcing rib 122. Main hub 200, second hollow section 201, Chassis 300, Leaf 400, Border width 500. Detailed Implementation

[0027] 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.

[0028] The following is for reference. Figures 1-10 According to an embodiment of the present invention, a centrifugal impeller 10 is provided with an air inlet side 11 and an air outlet side 12. The air inlet side 11 is located on one side of the centrifugal impeller 10 in the axial direction, and the air outlet side 12 is located on the outer periphery of the centrifugal impeller 10. Airflow enters from the air inlet side 11, is driven by the centrifugal impeller 10, and is discharged from the air outlet side 12.

[0029] It should be noted that during the use of the air conditioner, it is suitable to construct a centrifugal impeller 10 so that the airflow can be introduced from the middle side of the centrifugal impeller 10 and discharged from the periphery of the centrifugal impeller 10. The direction of airflow can be adjusted by the centrifugal impeller 10, so that the airflow can be adjusted by the centrifugal impeller 10 during the use of the air conditioner. This allows the airflow to flow according to the design and act on the designated position to complete the subsequent flow requirements, thereby realizing the airflow needs within the air conditioner and enabling the air conditioner to be used as designed.

[0030] In related technologies, during use, the centrifugal impeller 10 has an inlet side 11 formed in the middle and an outlet side 12 on its periphery. Airflow is introduced through the inlet side 11 and circulates within the impeller 10, then is ejected by centrifugal force and discharged from the outlet side 12. However, in existing technologies, the internal structure of the impeller 10 is designed such that during airflow, the airflow easily collides with the internal structure, forming vortices. This not only generates noise but also affects airflow, thus impacting the impeller's performance.

[0031] Therefore, this application provides a centrifugal impeller 10, which is connected to a drive motor. The drive motor is adapted to provide driving force to drive the centrifugal impeller 10, allowing it to rotate and drive airflow centrifugally out, thereby achieving airflow drive for the centrifugal impeller 10. Specifically, the centrifugal impeller 10 is adapted to be connected to the power output end of the drive motor, so that the driving force of the drive motor can be directly applied to the centrifugal impeller 10 according to the design to drive it to rotate, thus meeting the operational requirements of the centrifugal impeller 10.

[0032] Specifically, the centrifugal impeller 10 includes: a central disk assembly 100, a main hub 200, a chassis 300, blades 400, and a frame 500. The central disk assembly 100 is used to connect to a drive motor, and the driving force of the drive motor acts on the central disk assembly 100. The main hub 200 is located on the outer periphery of the central disk assembly 100, and the airflow continues to flow after passing through the outer side of the central disk assembly 100 and the outer side of the main hub 200 in sequence. The chassis 300 is connected to the outer periphery of the main hub 200. The blades 400 are connected to the outer periphery of the chassis 300, and multiple blades 400 are circumferentially spaced, and the air outlet side 11 is formed on the outer periphery of the blades 400. The airflow passing through the main hub 200 passes through the blades 400 and is discharged from the centrifugal impeller 10. The frame 500 is located on the side of the blades 400 away from the chassis 300, and the same end of multiple blades 400 away from the chassis 300 is connected to the frame 500.

[0033] In other words, the centrifugal impeller 10 in this application is adapted to include a central disk assembly 100, a main hub 200, a chassis 300, blades 400, and a frame 500. The central disk assembly 100 is adapted to be connected to the power output end of the drive motor so that the power output of the drive motor can be directly applied to the centrifugal impeller 10 to drive the centrifugal impeller 10 to rotate. Since the central disk assembly 100 is adapted to be connected to the main hub 200, the driving action is adapted to be transmitted through the main hub 200 and through the chassis 300 to the blades 400, ultimately determining that the blades 400 rotate so that the blades 400 can drive the airflow to be discharged from the centrifugal impeller 10 in a centrifugal direction. The frame 500 on the other side of the blades 400 is adapted to fix the blades 400 together with the chassis 300.

[0034] During airflow, the airflow enters the centrifugal impeller 10 through the central inlet. The airflow then flows along the central plate assembly 100 and the main hub 200 before exiting through the blades 400. Therefore, when the airflow passes through the outer periphery of the central plate assembly 100 and the main hub 200, the relatively large structural area of ​​the central plate assembly 100 affects airflow, causing vortices to form on the central plate assembly 100. These vortices not only affect airflow but also generate noise, impacting the operation of the centrifugal impeller 10.

[0035] The mid-disk assembly 100 includes a mid-disk 110 and a secondary hub 120. The mid-disk 110 is connected to the drive motor. The secondary hub 120 is connected to the outer periphery of the mid-disk 110, and the main hub 200 is connected to the outer periphery of the secondary hub 120. The airflow entering through the air intake side 11 is buffered by the mid-disk 110 and the secondary hub 120 before acting on the main hub 200.

[0036] In other words, the intermediate disk assembly 100 is adapted to include an intermediate disk 110 and an auxiliary hub 120. The intermediate disk 110 is adapted to provide a connection position so that the power output end of the drive motor is adapted to be connected to the intermediate disk 110. Then, the auxiliary hub 120 is adapted to be connected between the intermediate disk 110 and the main hub 200 so that the relative area between the intermediate disk 110 and the airflow is relatively low, thereby reducing the vortex flow and reducing the impact on the flow of airflow. At the same time, it can also reduce the generated noise and improve the performance of the centrifugal impeller 10.

[0037] According to the centrifugal impeller 10 of this utility model embodiment, since the middle disk assembly 100 is adapted to include a middle disk 110 and an auxiliary hub 120, when the airflow enters the centrifugal impeller 10 for circulation, it is adapted to circulate through the outer surfaces of the middle disk 110, the auxiliary hub 120 and the main hub 200, so that the vortex flow rate formed on the middle disk 110 is significantly reduced, thereby reducing the influence of the vortex on the airflow and improving the performance of the centrifugal impeller 10. At the same time, due to the reduction of the vortex flow rate, the noise generated during the airflow process is reduced, so that the centrifugal impeller 10 is used more quietly.

[0038] In some embodiments, the outer surface of the main hub 200 is constructed as a convex arc shape; and the outer surface of the auxiliary hub 120 is constructed as a convex arc shape, wherein the bending radius of the main hub 200 is larger than the bending radius of the auxiliary hub 120. It is understood that during airflow, the airflow is best directed across the outer surfaces of the main hub 200 and the auxiliary hub 120. Therefore, it is suitable to configure the outer surfaces of the main hub 200 and the auxiliary hub 120 as convex arc shapes to facilitate airflow during the flow process, reduce or even avoid the generation of eddies, improve the performance of the centrifugal impeller 10, and reduce the noise generated during operation, thereby achieving quiet operation of the centrifugal impeller 10. The bending radius of the main hub 200 is made larger than that of the secondary hub 120, so that the bending radius of the secondary hub 120 is smaller. This allows the airflow to be transmitted according to the design during the flow process, and can flow better on the secondary hub 120, reducing flow loss. This allows the airflow to be guided and buffered by the secondary hub 120 and the main hub 200, avoiding the generation of eddies, thereby reducing operating noise.

[0039] In some embodiments, the extension height of the secondary hub 120 in the axial direction of the centrifugal impeller 10 is A, and the extension height of the centrifugal impeller 10 in the axial direction of the centrifugal impeller 10 is B. The heights A and B satisfy the relationship: 0.05≤A / B≤0.3. In other words, the vertical height of the auxiliary hub 120 in the axial direction of the centrifugal impeller 10 is set to A, and the verticality in the axial direction of the centrifugal impeller 10 is set to B. To avoid the auxiliary hub 120 being too high and reducing the air intake of the centrifugal impeller 10, and also to avoid the auxiliary hub 120 being too low and generating too many vortices that affect the use of the centrifugal impeller 10, it is suitable to set the ratio of the vertical height of the auxiliary hub 120 to the vertical height of the centrifugal impeller 10 between 0.05 and 0.3, so that the auxiliary hub 120 has sufficient vertical height and a relatively high outer surface area to guide the airflow, thereby allowing the airflow to flow better within the centrifugal impeller 10. This makes the airflow within the centrifugal impeller 10 smoother, reduces the generated vortex flow, and allows the airflow to be discharged from the centrifugal impeller 10 better according to the design, increasing the air output of the centrifugal impeller 10, thereby improving the performance of the centrifugal impeller 10.

[0040] In some embodiments, the distance between the outer surface of the middle disk 110 and the air inlet side 11 is C, and the height B and distance C satisfy the relationship: 0 < C / B ≤ 0.5. It is understood that setting the distance between the outer surface of the middle disk 110 and the air inlet side 11 to C ensures a certain distance, allowing the air inlet side 11 of the centrifugal impeller 10 to have a better contact area to introduce airflow, increasing the airflow rate entering the centrifugal impeller 10, thereby improving the performance of the centrifugal impeller 10. Therefore, setting the ratio between the distance between the outer surface of the middle disk 110 and the air inlet side 11 and the vertical height of the centrifugal impeller 10 to less than 0.5 reduces the impact of the middle disk 110's placement on the air inlet, ensuring sufficient performance for the centrifugal impeller 10 during use. Simultaneously, the relatively small top surface area of ​​the middle disk 110 results in fewer vortices formed on the middle disk 110 by the airflow introduced into the centrifugal impeller 10, further improving the performance of the centrifugal impeller 10.

[0041] In some embodiments, the maximum projected diameter of the secondary hub 120 in the horizontal direction is D, and the projected diameter of the centrifugal impeller 10 in the horizontal direction is E. The diameters D and E satisfy the relationship: 0.05≤D / E≤0.3. It is understandable that the projected diameter of the secondary hub 120 in the horizontal direction is related to its outer peripheral position connected to the central plate 110. The ratio of the projected diameter of the secondary hub 120 in the horizontal direction to the horizontal projected diameter of the centrifugal impeller 10 is set between 0.05 and 0.3. That is to say, the size of the connection section between the secondary hub 120 and the outer side of the central plate 110 is relatively small. Therefore, it can be determined that the outer surface area of ​​the central plate 110 is relatively small, so that the distance between the central plate 110 and the air inlet side 11 can ensure the introduction of airflow, so that the centrifugal duct air conditioner can have high performance. At the same time, the connection area between the secondary hub 120 and the main hub 200 is relatively large, so that the connection between the secondary hub 120 and the main hub 200 can better guide the airflow, so that the vortex generated by the airflow in the centrifugal impeller 10 is relatively small, thereby improving the performance of the centrifugal impeller 10.

[0042] In some embodiments, the secondary hub 120 has a first hollow portion 121, and the main hub 200 has a second hollow portion 201. The first hollow portion 121 and the second hollow portion 201 communicate to form a receiving portion for accommodating the drive motor. That is, the secondary hub 120 has a first hollow portion 121 to save material, and the main hub 200 has a second hollow portion 201 to further save material, thereby reducing the production cost of the centrifugal impeller 10. Furthermore, by connecting the first hollow portion 121 and the second hollow portion 201 to form a receiving portion for accommodating the drive motor, the drive motor is positioned close to the centrifugal impeller 10, allowing the output of the drive motor to directly act on the centrifugal impeller 10, resulting in more stable and reliable output performance of the centrifugal impeller 10.

[0043] In some embodiments, the first hollow portion 121 is provided with reinforcing ribs 122, which are multiple and circumferentially spaced. The reinforcing ribs 122 radiate outward in the circumferential direction surrounding the centrifugal impeller, and one end of the reinforcing rib 122 is connected to the inner circumferential wall of the first hollow portion 121. It is understood that the reinforcing ribs 122 are provided in the first hollow portion 121 in a circumferentially spaced manner to support the secondary hub 120, thereby improving the structural strength of the secondary hub 120 and extending its service life to meet the usage requirements of the centrifugal impeller 10. This allows the airflow to be guided and flow through the outer surface of the secondary hub 120 as designed before continuing to flow onto the main hub 200, with relatively low impact on the airflow process, thus improving the output performance of the centrifugal impeller 10.

[0044] In some embodiments, the intermediate disk 110 is further provided with a bushing 111, which is connected to the side of the intermediate disk 110 facing the drive motor. The other end of the reinforcing rib 122 is correspondingly connected to the outer periphery of the bushing 111. The power output end of the drive motor is provided with a shaft core, which is disposed inside the bushing 111 to stabilize the power transmission process between the drive motor and the intermediate disk 110. That is, the bushing 111 is provided on the intermediate disk 110, and the bushing 111 is adapted to be constructed on the side of the intermediate disk 110 facing the drive motor, so that the shaft core at the power output end of the drive motor can be correspondingly disposed inside the bushing 111, so that the bushing 111 can protect the shaft core and has a longer contact area so that the driving performance of the drive motor can better act on the intermediate disk 110, thereby making the performance output of the centrifugal impeller 10 more reliable.

[0045] In some embodiments, the intermediate disk 110 is provided with a mounting groove 112, and a gasket 113 is provided in the mounting groove 112. The gasket 113 is a metal gasket 113, and a through hole 114 is provided in the center of the gasket 113. The shaft core passes through the through hole 114 and is connected to the bushing 111. The gasket 113 is used to improve the structural strength of the intermediate disk 110. In this way, by providing a mounting groove 112 in the intermediate disk 110, the mounting groove 112 is adapted to provide a position for the gasket 113, so that the gasket 113 can be arranged within the intermediate disk 110, thereby improving the structural strength of the intermediate disk 110. This makes the connection between the intermediate disk 110 and the drive motor more reliable, and the power output of the drive motor can be applied to the centrifugal impeller 10 as designed, so that the centrifugal impeller 10 has higher performance to meet the needs of use.

[0046] The centrifugal fan according to an embodiment of the present invention includes: a centrifugal impeller as shown above and a drive motor. Thus, by providing the centrifugal impeller 10 as shown above within the air conditioner, and since the central disk assembly 100 is adapted to include a central disk 110 and an auxiliary hub 120, when airflow enters the centrifugal impeller 10, it is adapted to flow through the outer surfaces of the central disk 110, the auxiliary hub 120, and the main hub 200. This significantly reduces the vortex flow rate formed on the central disk 110, thereby reducing the impact of vortices on airflow and improving the performance of the centrifugal impeller 10. Simultaneously, the reduction in vortex flow rate reduces the noise generated during airflow, making the centrifugal fan quieter to operate.

[0047] An air conditioner according to an embodiment of the present invention includes: a centrifugal impeller 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 airflow, the centrifugal impeller 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] According to the embodiment of the present invention, the air conditioner is equipped with a centrifugal impeller 10 as shown above. Since the middle disk assembly 100 is adapted to include a middle disk 110 and an auxiliary hub 120, when the airflow enters the centrifugal impeller 10, it is adapted to flow through the outer surfaces of the middle disk 110, the auxiliary hub 120 and the main hub 200, so that the vortex flow rate formed on the middle disk 110 is significantly reduced, thereby reducing the influence of the vortex on the airflow and improving the performance of the centrifugal impeller 10. At the same time, due to the reduction of the vortex flow rate, the noise generated during the airflow process is reduced, so that the air conditioner is quieter to use.

[0054] 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.

[0055] 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.

[0056] 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 mid-disk assembly; 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 mid-disk assembly includes: The middle plate is connected to the drive motor; A secondary hub is connected to the outer periphery of the center disc, and the main hub is connected to the outer periphery of the secondary hub.

2. The centrifugal impeller of claim 1, wherein The outer surface of the main hub is convex arc-shaped; and The outer surface of the secondary hub is convex arc-shaped, wherein the bending radius of the main hub is greater than the bending radius of the secondary hub.

3. The centrifugal impeller of claim 1, wherein The extension height of the auxiliary hub in the axial direction of the centrifugal impeller is A, and the extension height of the centrifugal impeller in the axial direction of the centrifugal impeller is B. The heights A and B satisfy the relationship: 0.05≤A / B≤0.

3.

4. The centrifugal impeller of claim 3, wherein The distance between the outer surface of the middle plate and the air inlet side is C, and the height B and the distance C satisfy the relationship: 0 < C / B ≤ 0.

5.

5. The centrifugal impeller of claim 1, wherein The maximum projected diameter of the secondary hub in the horizontal direction is D, and the projected diameter of the centrifugal impeller in the horizontal direction is E. The diameters D and E satisfy the relationship: 0.05≤D / E≤0.

3.

6. The centrifugal impeller of claim 1, wherein The secondary hub has a first hollow portion, and the main hub has a second hollow portion. The first hollow portion and the second hollow portion are connected to form a receiving portion, which is used to accommodate the drive motor.

7. The centrifugal impeller of claim 6, wherein The first hollow part is provided with reinforcing ribs. There are multiple reinforcing ribs arranged circumferentially. The reinforcing ribs radiate outward along the circumferential direction surrounding the centrifugal impeller, and one end of the reinforcing rib is connected to the inner peripheral wall of the first hollow part.

8. The centrifugal impeller of claim 7, wherein The middle plate is also provided with a bushing, which is connected to the side of the middle plate facing the drive motor. The other end of the reinforcing rib is connected to the outer periphery of the bushing. The power output end of the drive motor is provided with a shaft core, which is located inside the bushing. The middle plate is provided with a mounting groove, and a gasket is provided in the mounting groove. The gasket has a through hole in its center, and the shaft core passes through the through hole and is connected to the bushing.

9. A centrifugal fan characterized by include: The centrifugal impeller and the drive motor as described in any one of claims 1-8.

10. An air conditioner characterized by comprising: include: The centrifugal fan as described in claim 9.

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