Centrifugal fan and air handling equipment having the same

Abstract

The present invention discloses a centrifugal impeller and air treatment equipment having the same. The centrifugal impeller includes a hub and blades. The hub is formed with multiple air inlet holes, which are spaced apart along the circumference of the hub, each air inlet hole extending through the hub. The hub is provided with multiple blades, each of which is disposed on the hub. The blades are spaced apart along the circumference of the hub and radially outward of the multiple air inlet holes. The number of blades is equal to the number of air inlet holes, and each blade is radially opposite to a corresponding air inlet hole along the hub. The centrifugal impeller according to the present invention has a large ventilation volume and ventilation efficiency, and has good sound quality.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment devices, and in particular to a centrifugal fan wheel and air treatment equipment having the same. Background Art

[0002] The centrifugal impeller rotates by inputting mechanical energy, thereby increasing the gas pressure and achieving gas discharge. In the related art, the centrifugal impeller has a low air volume and low ventilation efficiency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a centrifugal fan having a large ventilation volume and ventilation efficiency and good sound quality.

[0004] The present invention also provides an air treatment device having the centrifugal wind wheel.

[0005] According to the first aspect of the present invention, the centrifugal wind wheel includes: a hub, a plurality of air inlet holes are formed on the hub, the plurality of air inlet holes are arranged at intervals along the circumference of the hub, and each of the air inlet holes passes through the hub; blades, there are multiple blades, and the plurality of blades are all arranged on the hub, the plurality of blades are arranged at intervals along the circumference of the hub and are arranged radially outside the plurality of air inlet holes, the number of the blades is equal to the number of the air inlet holes, and each blade is arranged radially opposite to the corresponding air inlet hole along the hub.

[0006] According to the centrifugal wind wheel of the embodiment of the present invention, a plurality of air inlet holes are formed on the hub, and the number of the air inlet holes is equal to the number of blades, and each air inlet hole is arranged opposite to the corresponding blade along the radial direction of the hub. While ensuring the structural strength of the centrifugal wind wheel, the ventilation volume and ventilation efficiency of the centrifugal wind wheel are effectively improved, and at the same time, the flow field stability of the centrifugal wind wheel is ensured, so that the centrifugal wind wheel has good sound quality.

[0007] In some embodiments, the air inlet extends radially along the hub and has a profile line extending radially along the hub, the blade has a bone line extending radially along the hub, and on the cross-section of the hub, the orthographic projection of the hub center axis, the radially outer endpoint of the orthographic projection of the profile line and the radially inner endpoint of the orthographic projection corresponding to the bone line are located on the same straight line.

[0008] In some embodiments, the profile line is formed as a straight line, and on the cross section of the hub, the orthographic projection of the hub center axis, the radially outer endpoint of the orthographic projection of the profile line, the radially inner endpoint of the orthographic projection of the profile line and the radially inner endpoint of the orthographic projection of the corresponding bone line are located on the same straight line.

[0009] In some embodiments, on the cross-section of the hub, the radial inner endpoint of the orthographic projection of the bone line and the two side endpoints of the orthographic projection of the outer contour corresponding to the air inlet hole on the circumferential direction of the hub are respectively connected to form a first straight line and a second straight line, and the angle formed between the first straight line and the second straight line toward the corresponding air inlet hole is α, and α satisfies: 120°≤α≤135°.

[0010] In some embodiments, in the radial direction of the hub, the distance between the radial inner end point of the profile and the central axis of the hub is L0, and L0 satisfies: L0≥0.3R, where R is the radius of the centrifugal wind wheel.

[0011] In some embodiments, in the radial direction of the hub, the length of the profile is L1, and L1 satisfies: 0.3L≤L1≤0.2R, wherein L is the length of the blade in the radial direction of the hub, and R is the radius of the centrifugal wind wheel.

[0012] In some embodiments, in the radial direction of the hub, the distance between the radial outer end point of the profile line and the radial inner end point of the corresponding bone line is L2, and L2 satisfies: 1mm≤L2≤0.3L, where L is the length of the blade in the radial direction of the hub.

[0013] In some embodiments, the centrifugal wind wheel further includes a reinforcement ring, wherein the reinforcement ring and the hub are spaced apart along the axial direction of the hub and are respectively located at both ends of the length of the blade.

[0014] An air treatment device according to an embodiment of a second aspect of the present invention includes a centrifugal impeller according to an embodiment of the first aspect of the present invention.

[0015] The air treatment equipment according to the embodiment of the present invention effectively improves the air volume of the air treatment equipment by adopting the above-mentioned centrifugal fan wheel, while ensuring the sound quality of the air treatment equipment.

[0016] In some embodiments, the air handling device is an air conditioner having a fresh air duct, and the centrifugal wind wheel is arranged in the fresh air duct.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 is a schematic diagram of a centrifugal wind wheel according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 An enlarged view of the circled section A;

[0021] Figure 3 yes Figure 1 Another schematic diagram of the centrifugal wind wheel shown in;

[0022] Figure 4 yes Figure 3 Another schematic diagram of the centrifugal wind wheel described in;

[0023] Figure 5 yes Figure 4 An enlarged view of the circled section B;

[0024] Figure 6 It is a schematic diagram of the airflow of a centrifugal wind wheel in the related art.

[0025] Reference numerals:

[0026] Centrifugal wind wheel 100, first straight line Ω3, second straight line Ω4,

[0027] Hub 1, center axis 1a,

[0028] Air inlet 10, profile Ω1,

[0029] Bottom plate 11, shaft core 12, connecting portion 13,

[0030] Blade 2, centrifugal duct 20, bone line Ω2,

[0031] Reinforcement circle 3. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will appreciate the applicability of other processes and / or the use of other materials.

[0034] Hereinafter, a centrifugal wind wheel 100 according to an embodiment of the first aspect of the present invention will be described with reference to the accompanying drawings.

[0035] like Figure 1 As shown, the centrifugal wind wheel 100 includes a hub 1 and blades 2. A plurality of air inlet holes 10 are formed on the hub 1. The plurality of air inlet holes 10 are arranged at intervals along the circumference of the hub 1. Each air inlet hole 10 passes through the hub 1. There are multiple blades 2, and the plurality of blades 2 are all arranged on the hub 1. The plurality of blades 2 are arranged at intervals along the circumference of the hub 1. A centrifugal air duct 20 is defined between two adjacent blades 2. The centrifugal air duct 20 is connected to the air inlet holes 10, and the plurality of blades 2 are arranged at intervals on the radial outside of the plurality of air inlet holes 10. Then, in the radial direction of the hub 1, the plurality of air inlet holes 10 are located on the inner side of the plurality of blades 2.

[0036] Thus, the centrifugal wind wheel 100 rotates, and part of the airflow flows to the inner side of the multiple blades 2 through the air inlet 10, and another part of the airflow flows to the inner side of the multiple blades 2 through the end of the blade 2 away from the hub 1. Both parts of the airflow flow out through the centrifugal air duct 20, thereby increasing the air intake area of ​​the centrifugal wind wheel 100, effectively improving the ventilation air volume of the centrifugal wind wheel 100, and thus improving the ventilation efficiency of the centrifugal wind wheel 100. Moreover, the hub 1 is suitable for connection with the motor, and the airflow flowing to the inner side of the blade 2 through the air inlet 10 can also effectively dissipate heat from the motor to cool the motor. In the description of the present invention, the meaning of "multiple" is two or more.

[0037] Among them, such as Figure 3 and Figure 4 As shown, the number of blades 2 is equal to the number of air inlet holes 10, then each blade 2 corresponds to an air inlet hole 10, and each air inlet hole 10 corresponds to a blade 2, so that multiple air inlet holes 10 and multiple blades 2 are respectively arranged in a one-to-one correspondence; each blade 2 and the corresponding air inlet hole 10 are arranged relative to each other along the radial direction of the hub 1, then in the radial direction of the hub 1, each blade 2 is respectively arranged on the outside of the corresponding air inlet hole 10, and since the centrifugal wind wheel 100 is a rotating component, the airflow flowing out through the air inlet hole 10 can flow more peacefully into the centrifugal air duct 20 for acceleration, avoiding the flow field of the centrifugal wind wheel 100 from being unstable due to the setting of the air inlet hole 10, resulting in abnormal noise, thereby ensuring the flow field stability of the centrifugal wind wheel 100, and then ensuring that no other abnormal noise is generated during the rotation of the centrifugal wind wheel 100, so that the centrifugal wind wheel 100 has good sound quality and guarantees user experience.

[0038] It should be noted that the direction “outward” refers to the direction away from the central axis 1 a of the hub 1 along the radial direction of the hub 1 , and the opposite direction is defined as “inward”.

[0039] According to the centrifugal wind wheel 100 of the embodiment of the present invention, by forming a plurality of air inlet holes 10 on the hub 1, and making the number of air inlet holes 10 equal to the number of blades 2, and each air inlet hole 10 is arranged opposite to the corresponding blade 2 along the radial direction of the hub 1, while ensuring the structural strength of the centrifugal wind wheel 100, the ventilation volume and ventilation efficiency of the centrifugal wind wheel 100 are effectively improved, and the flow field of the centrifugal wind wheel 100 is also ensured to be stable, so that the centrifugal wind wheel 100 has good sound quality. Therefore, the present application can improve the ventilation efficiency and stability of the centrifugal wind wheel 100 without changing the overall structural dimensions of the centrifugal wind wheel 100, so as to make the centrifugal wind wheel 100 have good applicability and practicality.

[0040] The inventors of the present application conducted an experimental comparison between the centrifugal wind wheel 100 of the embodiment of the present application and the centrifugal wind wheel without air inlet holes in the related art. The results showed that at the same rotational speed, the centrifugal wind wheel 100 in the present application has a significantly improved air volume compared with the centrifugal wind wheel in the related art, and the air volume increase can reach 10%. It has also been verified that the centrifugal wind wheel 100 in the present application does not produce abnormal noise during operation, and there are no abnormalities in the frequency spectrum and auditory perception. It also meets the drop requirements, has no safety hazards, and has good reliability in use.

[0041] Furthermore, some technologies, for motor heat dissipation or weight reduction considerations, provide openings in the profile of the centrifugal rotor. The arrangement of the openings is unfounded and rather arbitrary. For example, regardless of the structure of the centrifugal rotor, the hub typically has six openings, which limits the increase in air volume of the centrifugal rotor. In this application, the number of air inlet holes 10 is set equal to the number of blades 2, and each air inlet hole 10 is arranged radially opposite to the corresponding blade 2 along the hub 1. This ensures the structural strength of the centrifugal rotor 100 while further increasing the air volume, stabilizing the flow field of the centrifugal rotor 100, and preventing other abnormal noises from the centrifugal rotor 100.

[0042] For example, Figure 6 The difference in flow state of a centrifugal impeller with six openings in some technologies is shown in the document. In a centrifugal impeller with six openings, because the openings are too large, if the area formed by adjacent blades is regarded as a duct, the flow direction of the gas flowing into a single duct will be too different. The airflow deflection angle β2-β1 (where β2 is the airflow outlet angle and β1 is the airflow inlet angle) in the entire duct is often around 75°. Such a large change in airflow direction will cause the flow loss of the airflow with large flow difference to be more obvious, thus offsetting the energy of the airflow introduced by the large opening, and thus failing to effectively increase the air volume. In the present application, the airflow flowing into the air inlet hole 10 can gradually flow along the profile Ω1 of the blade 2. Due to the wall adhesion effect of the fluid, its flow state is more stable, the flow loss is smaller, and the work efficiency of a single blade 2 is higher, thereby bringing a larger air volume.

[0043] Furthermore, for a high-speed centrifugal impeller, for example, with a diameter of 0.1m and a rotational speed of 2400rpm, it will be subjected to a tensile force approximately 3000 times its own mass. Under these circumstances, the aforementioned solution of six openings is even less viable, as the blade strength would be far from sufficient for high-speed operation. However, the centrifugal impeller 100 of this application, with a 1:1 ratio of air inlet holes 10 to blades 2, has been experimentally verified to fully meet the structural strength requirements.

[0044] Among them, the inventors of the present application conducted the following experimental verification: a centrifugal wind wheel with a diameter of 0.13m was selected, and the experimental items are shown in Table 1 below. In the table, "Related Technology 1" refers to a centrifugal wind wheel without air inlet holes, and "Related Technology 2" refers to a centrifugal wind wheel with six openings. It can be clearly seen from the table that at the same speed, the centrifugal wind wheel 100 of the present application has a significantly improved air volume, and there are no abnormal sounds or safety hazards. Compared with the centrifugal wind wheel without air inlet holes and the centrifugal wind wheel with six openings, the centrifugal wind wheel 100 of the present application has obvious technical advantages.

[0045] Table 1 Comparison of experimental verification results of this application and related technologies

[0046] Test items Related technology 1 Related Technology 2 This application Air volume <![CDATA[53m 3 / h]]> <![CDATA[55m 3 / h]]> <![CDATA[60m 3 / h]]> noise 49dB 49.2dB 49.2dB strength No breakage at 2400rpm At 2400rpm, the No breakage at 2400rpm

[0047] For example, in Figure 1 and Figure 3 In the example, the hub 1 includes a bottom plate portion 11, a shaft core portion 12, and a connecting portion 13. The bottom plate portion 11 is formed into an annular structure and is sleeved on the radially outer side of the shaft core portion 12. The bottom plate portion 11 and the shaft core portion 12 are spaced apart along the radial direction of the hub 1. The connecting portion 13 is connected between the bottom plate portion 11 and the shaft core portion 12. The radial outer edge of the connecting portion 13 is connected to the bottom plate portion 11, and the radial inner edge of the connecting portion 13 is connected to the shaft core portion 12. The shaft core portion 2 is suitable for being connected to a motor so as to be driven by the motor to realize the rotation of the centrifugal impeller 100. The plurality of blades 2 are all provided on the bottom plate portion 11, and the plurality of air inlet holes 10 are all formed on the connecting portion 13. In the radial direction of the hub 1, the plurality of air inlet holes 10 are located between the shaft core portion 12 and the plurality of blades 2.

[0048] In some embodiments, as Figure 2 、 Figure 4 and Figure 5As shown, the air inlet 10 extends in the radial direction of the hub 1, and the air inlet 10 has a profile line Ω1 extending in the radial direction of the hub 1. The blades 2 have a bone line Ω2 extending in the radial direction of the hub 1. On the cross section of the hub 1, the orthographic projection of the central axis 1a of the hub 1, the radially outer end point of the orthographic projection of the profile line Ω1, and the radially inner end point of the orthographic projection of the corresponding bone line Ω2 are located on the same straight line. Then, on the cross section of the hub 1, the orthographic projection of the central axis 1a of the hub 1, the radially outer end point of the orthographic projection of each profile line Ω1, and the radially inner end point of the orthographic projection of the corresponding bone line Ω2 are located on the same straight line. For example, Figure 5 In the example, on the cross section of the hub 1, the orthographic projection O1 of the hub's central axis 1a, the radially outer endpoint O3 of the orthographic projection of the profile line Ω1, and the radially inner endpoint O2 of the orthographic projection of the corresponding skeleton line Ω2 lie on the same straight line. In other words, on the cross section of the hub 1, the orthographic projection of the axis of the cylindrical surface on which the multiple blades 2 are located, the radially outer endpoint of the orthographic projection of the profile line Ω1, and the radially inner endpoint of the orthographic projection of the corresponding skeleton line Ω2 lie on the same straight line. Thus, the air inlet 10 is rationally positioned, further ensuring the structural strength and flow field stability of the centrifugal rotor 100, avoiding abnormal noise and safety hazards during rotation, and thus ensuring the sound quality and operational safety of the centrifugal rotor 100.

[0049] It should be noted that the profile line Ω1 of the air inlet 10 can be understood as the midline of the outer contour shape of the positive projection of the air inlet 10 on the cross section of the hub 1, and the skeleton line Ω2 of the blade 2 can be understood as the midline of the cross-sectional shape of the blade 2 along the streamline direction. The cross section of the hub 1 is perpendicular to the central axis 1a of the hub 1.

[0050] In some embodiments, as Figure 2 、 Figure 4 and Figure 5 As shown, the profile line Ω1 is formed as a straight line, and the outer contour of the orthographic projection of the air inlet 10 on the cross section of the hub 1 can be symmetrical about the profile line Ω1; on the cross section of the hub 1, the orthographic projection of the central axis 1a of the hub 1, the radial outer end point of the orthographic projection of the profile line Ω1, the radial inner end point of the orthographic projection of the profile line Ω1 and the radial inner end point of the orthographic projection of the corresponding skeleton line Ω2 are located on the same straight line, for example, Figure 5In the example, on the cross section of the hub 1, the orthographic projection O1 of the central axis 1a of the hub 1, the radial outer end point O3 of the orthographic projection of the profile line Ω1, the radial inner end point O4 of the orthographic projection of the profile line Ω1 and the radial inner end point O2 of the orthographic projection of the corresponding bone line Ω2 are located on the same straight line. Then, on the cross section of the hub 1, the straight line formed by connecting the orthographic projection of the central axis 1a of the hub 1 and the radial inner end point of the orthographic projection of the bone line Ω2 is collinear with the orthographic projection of the profile line Ω1, thereby simplifying the structure of the air inlet 10 and facilitating processing. At the same time, it can further effectively weaken the influence of the air inlet 10 on the structural strength of the centrifugal wind wheel 100, ensuring the reliable use of the centrifugal wind wheel 100.

[0051] In addition, the inventors of this application have found through research and experimental verification that the width of the outer end of the air inlet hole 10 in the circumferential direction of the hub 1 will affect the air volume of the centrifugal wind wheel 100, thereby further reasonably setting the air inlet hole 10. In some embodiments, such as Figure 5 As shown, on the cross section of the hub 1, the radial inner endpoint of the orthographic projection of the bone line Ω2 and the two side endpoints of the orthographic projection of the outer contour of the corresponding air inlet hole 10 in the circumferential direction of the hub 1 are respectively connected to form a first straight line Ω3 and a second straight line Ω4. For example, the radial inner endpoint O2 of the orthographic projection of the bone line Ω2 and the endpoint A1 of the orthographic projection of the outer contour of the corresponding air inlet hole 10 on one circumferential side of the hub 1 are connected to form a first straight line Ω3, and the radial inner endpoint O2 of the orthographic projection of the bone line Ω2 and the endpoint A2 of the orthographic projection of the outer contour of the corresponding air inlet hole 10 on the other circumferential side of the hub 1 are connected to form a second straight line Ω4. The angle formed between the first straight line Ω3 and the second straight line Ω4 toward the above-mentioned corresponding air inlet hole 10 is α, and α satisfies 120°≤α≤135°, then the angle formed between the first straight line Ω3 and the second straight line Ω4 back to the corresponding air inlet hole 10 is also α. Therefore, by setting the angle α, the air inlet 10 is more reasonably arranged, thereby effectively improving the air volume of the centrifugal wind wheel 100. Moreover, the inventors of the present application have verified through experiments that an angle α that is too large or too small has no significant effect on improving the air volume of the centrifugal wind wheel 100.

[0052] Optionally, the angle α formed between the first straight line Ω3 and the second straight line Ω4 toward the corresponding air inlet 10 satisfies 120°<α<135°, for example, α may be 125°, 129°, 130°, or 133°.

[0053] In some embodiments, as Figure 4 and Figure 5 As shown, in the radial direction of the hub 1, the distance between the radial inner end point of the profile line Ω1 and the central axis 1a of the hub 1 is L0. Figure 5In the example, in the radial direction of the hub 1, the distance between the radial inner end point O4 of the profile line Ω1 and the central axis 1a of the hub 1 is L0, and L0 satisfies L0≥0.3R, where R is the radius of the centrifugal wind wheel 100, that is, L0 is greater than or equal to 30% of the radius of the centrifugal wind wheel 100, so as to avoid the setting of the air inlet hole 10 excessively weakening the structural strength of the centrifugal wind wheel 100, thereby effectively ensuring the structural strength of the centrifugal wind wheel 100 during rotation.

[0054] Optionally, in the radial direction of the hub 1, the distance L0 between the radial inner end point of the profile line Ω1 and the central axis 1a of the hub 1 is greater than 30% of the radius of the centrifugal wind wheel 100. For example, the distance L0 may be 0.33R, or 0.35R.

[0055] It is understandable that when the centrifugal wind wheel 100 includes the reinforcement ring 3, as shown in FIG. Figure 4 As shown, the radius of the centrifugal wind wheel 100 may be the outer edge radius of the reinforcement ring 3; when the centrifugal wind wheel 100 does not include the reinforcement ring 3, the radius of the centrifugal wind wheel 100 may be the radius of the hub 1; but it is not limited thereto.

[0056] In some embodiments, as Figure 4 and Figure 5 As shown, in the radial direction of the hub 1, the length of the profile line Ω1 is L1, and the length of the profile line Ω1 can be the radial distance between the radial inner end point O4 of the profile line Ω1 and the radial inner end point O3 of Ω1, that is, the length of the air inlet 10 in the radial direction of the hub 1, L1 satisfies 0.3L≤L1≤0.2R, wherein L is the radial length of the blade 2 in the hub 1, and R is the radius of the centrifugal wind wheel 100, that is, L1 is greater than or equal to 30% of the radial length of the blade 2 to effectively increase the air volume of the centrifugal wind wheel 100, and L1 is less than or equal to 20% of the radius of the centrifugal wind wheel 100 to ensure the structural strength of the centrifugal wind wheel 100.

[0057] Optionally, in the radial direction of the hub 1 , the length L1 of the profile line Ω1 satisfies 0.3L<L1<0.2R, so as to effectively increase the air volume of the centrifugal wind wheel 100 while ensuring the structure of the centrifugal wind wheel 100 .

[0058] In some embodiments, as Figure 4 and Figure 5 As shown, in the radial direction of the hub 1, the distance between the radially outer end point of the profile line Ω1 and the radially inner end point of the corresponding skeleton line Ω2 is L2. Figure 5In the example, in the radial direction of the hub 1, the distance between the radial outer end point O3 of the profile line Ω1 and the radial inner end point O2 of the corresponding profile line Ω2 is L2, then the distance L2 is the shortest radial distance between the air inlet 10 and the corresponding blade 2, where L2 satisfies 1mm≤L2≤0.3L, L is the length of the blade 2 in the radial direction of the hub 1, that is, L2 is greater than or equal to 1mm and L2 is less than or equal to 30% of the radial length of the blade 2, thereby ensuring the power of the centrifugal wind wheel 100, so that the centrifugal wind wheel 100 has a good rotational work effect.

[0059] Optionally, in the radial direction of the hub 1 , a distance L2 between a radially outer end point of the profile line Ω1 and a radially inner end point of the corresponding profile line Ω2 satisfies 1 mm < L2 < 0.3L.

[0060] In some embodiments, as Figure 1 and Figure 3 As shown, the centrifugal wind wheel 100 also includes a reinforcement ring 3. The reinforcement ring 3 and the hub 1 are arranged at intervals along the axial direction of the hub 1, and the reinforcement ring 3 and the hub 1 are respectively located at the two ends of the length of the blade 2. Each blade 2 is connected between the hub 1 and the reinforcement ring 3, that is, one end of the length of the blade 2 is connected to the hub 1, and the other end of the length of the blade 2 is connected to the reinforcement ring 3, thereby improving the structural strength of the centrifugal wind wheel 100.

[0061] The air treatment device according to the second embodiment of the present invention includes the centrifugal impeller 100 according to the first embodiment of the present invention. The air treatment device may be an air conditioner, a dehumidifier, a humidifier, or an air purifier, and may also be a combination of at least two of the above devices.

[0062] The air treatment equipment according to the embodiment of the present invention effectively improves the air volume of the air treatment equipment by adopting the centrifugal wind wheel 100 described above, while ensuring the sound quality of the air treatment equipment.

[0063] In some embodiments, the air handling device is an air conditioner, and the air handling device has a fresh air duct that can bring outdoor fresh air into the room, achieving indoor and outdoor air circulation. The centrifugal impeller 100 is disposed in the fresh air duct. For example, if the air conditioner has a fresh air module, within the constraints of factors such as the size and mechanical strength of the fresh air module, the centrifugal impeller 100 can effectively increase the air exchange volume and ventilation efficiency of the air conditioner, provide reliable operation, and ensure good sound quality of the air conditioner.

[0064] It is understandable that a heat exchange device may not be installed in the fresh air duct. In this case, the fresh air duct does not have a heat exchange function and does not participate in cooling and heating. Of course, a heat exchange device may also be installed in the fresh air duct. In this case, the fresh air duct not only has a fresh air function, but also has a heat exchange function.

[0065] Other structures and operations of the air treatment equipment according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0066] In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "thickness", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0067] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0068] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A centrifugal wind wheel, characterized in that: include: A wheel hub, wherein a plurality of air inlet holes are formed on the wheel hub, the plurality of air inlet holes are arranged at intervals along the circumference of the wheel hub, and each of the air inlet holes passes through the wheel hub; Blades, wherein there are a plurality of blades, each of which is provided on the hub, and the plurality of blades are spaced apart along the circumference of the hub and radially outward of the plurality of air inlet holes, the number of the blades is equal to the number of the air inlet holes, and each blade is arranged radially opposite to the corresponding air inlet hole along the hub; The hub comprises a bottom plate portion, an axis core portion and a connecting portion, the bottom plate portion is formed into an annular structure, the bottom plate portion is sleeved on the radially outer side of the axis core portion, and the bottom plate portion and the axis core portion are spaced apart along the radial direction of the hub, the connecting portion is connected between the bottom plate portion and the axis core portion, the radial outer edge of the connecting portion is connected to the bottom plate portion, the radial inner edge of the connecting portion is connected to the axis core portion, the axis core portion is suitable for being connected to a motor, a plurality of blades are provided on the bottom plate portion, a plurality of air inlet holes are formed on the connecting portion, and in the radial direction of the hub, the plurality of air inlet holes are located between the axis core portion and the plurality of blades; The air inlet extends in the radial direction of the hub and has a profile line extending in the radial direction of the hub, and the blade has a bone line extending in the radial direction of the hub. In a cross section of the hub, the orthographic projection of the hub central axis, the radially outer end point of the orthographic projection of the profile line, and the radially inner end point of the orthographic projection corresponding to the bone line are located on the same straight line; Among them, the profile line of the air inlet is the midline of the outer contour shape of the positive projection of the air inlet on the cross section of the hub, the bone line of the blade is the midline of the cross-sectional shape of the blade along the streamline direction, the cross section of the hub is perpendicular to the central axis of the hub, and on the cross section of the hub, the radial inner endpoint of the positive projection of the bone line and the two side endpoints of the positive projection of the outer contour of the corresponding air inlet on the circumferential direction of the hub are respectively connected to form a first straight line and a second straight line, and the angle formed between the first straight line and the second straight line toward the corresponding air inlet is α, and α satisfies: 120°≤α≤135°, wherein the two side endpoints are arranged close to the blade.

2. The centrifugal wind wheel according to claim 1, characterized in that: The profile line is formed as a straight line. On the cross section of the hub, the orthographic projection of the hub center axis, the radially outer endpoint of the orthographic projection of the profile line, the radially inner endpoint of the orthographic projection of the profile line and the radially inner endpoint of the orthographic projection of the corresponding bone line are located on the same straight line.

3. The centrifugal wind wheel according to claim 1, characterized in that: In the radial direction of the hub, the distance between the radial inner end point of the profile and the central axis of the hub is L0, and L0 satisfies: L0≥0.3R, where R is the radius of the centrifugal wind wheel.

4. The centrifugal wind wheel according to claim 1, characterized in that: In the radial direction of the hub, the length of the profile is L1, and L1 satisfies: 0.3L≤L1≤0.2R, wherein L is the length of the blade in the radial direction of the hub, and R is the radius of the centrifugal wind wheel.

5. The centrifugal wind wheel according to claim 1, characterized in that: In the radial direction of the hub, the distance between the radial outer end point of the profile line and the radial inner end point of the corresponding skeleton line is L2, and L2 satisfies: 1mm≤L2≤0.3L, where L is the length of the blade in the radial direction of the hub.

6. The centrifugal wind wheel according to any one of claims 1 to 5, characterized in that: Also includes: The reinforcing ring and the hub are spaced apart along the axial direction of the hub and are respectively located at both ends of the length of the blade.

7. An air treatment device, characterized in that: It comprises a centrifugal wind wheel according to any one of claims 1-6.

8. The air treatment device according to claim 7, characterized in that The air treatment equipment is an air conditioner and has a fresh air duct, and the centrifugal wind wheel is arranged in the fresh air duct.

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