WO2022062130A1 - Centrifugal wind wheel and air treatment device having same - Google Patents

Abstract

A centrifugal wind wheel (100) and an air treatment device having same. The centrifugal wind wheel (100) comprises a hub (1) and blades (2), wherein a plurality of air input holes (10) are formed in the hub (1), the plurality of air input holes (10) are arranged at intervals in the circumferential direction of the hub (1), and each air input hole (10) penetrates the hub (1); and a plurality of blades (2) are provided, the plurality of blades (2) are all arranged on the hub (1), the plurality of blades (2) are arranged at intervals in the circumferential direction of the hub (1) and are arranged at intervals on the radial outer side of the plurality of air input holes (10), the number of blades (2) is equal to the number of air input holes (10), and each blade (2) is arranged opposite a corresponding air input hole (10) in the radial direction of the hub (1).

Description

Centrifugal impeller and air treatment equipment having the same

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with application number 202011044953.X and the application date on September 28, 2020 and the Chinese patent application with application number 202022179591.7 and application date on September 28, 2020, and requires the above-mentioned Chinese patent application. Priority, the entire contents of the above Chinese patent application are incorporated herein by reference.

technical field

The present application 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 technique

The centrifugal wind wheel rotates by the input of mechanical energy, thereby increasing the gas pressure and realizing the gas discharge. In the related art, the air volume of the centrifugal wind wheel is low, and the ventilation efficiency is low.

SUMMARY OF THE INVENTION

The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application proposes a centrifugal wind wheel, the centrifugal wind wheel has large ventilation air volume and ventilation efficiency, and has good sound quality.

The present application also proposes an air treatment device having the above centrifugal fan.

The centrifugal wind wheel according to the embodiment of the first aspect of the present application includes: a hub, a plurality of air inlet holes are formed on the hub, and the plurality of air inlet holes are arranged at intervals along the circumferential direction of the hub, each of the The air inlet holes pass through the hub; the blades are multiple, and the multiple blades are all arranged on the hub, and the multiple blades are arranged at intervals along the circumferential direction of the hub and are arranged at intervals on the multiple On the radially outer side of the air inlet holes, the number of the blades is equal to the number of the air inlet holes, and each of the blades and the corresponding air inlet holes are arranged opposite to the radial direction of the hub.

According to the centrifugal wind wheel of the embodiment of the present application, by forming a plurality of air inlet holes on the hub, and making the number of air inlet holes equal to the number of blades, and each air inlet hole and the corresponding blade are arranged opposite to the radial direction of the hub, While ensuring the structural strength of the centrifugal wind wheel, the ventilation air volume and ventilation efficiency of the centrifugal wind wheel are effectively improved, and the flow field of the centrifugal wind wheel is guaranteed to be stable, so that the centrifugal wind wheel has good sound quality.

In some embodiments, the air inlet hole extends radially of the hub and has a profile extending radially of the hub, and the blade has a bone line extending radially of the hub, at On the cross section of the hub, the orthographic projection of the central axis of the hub, the radially outer end point of the orthographic projection of the profile line and the radially inner end point corresponding to the orthographic projection of the bone line are located on the same straight line.

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 central axis of the wheel hub, the radially outer end point of the orthographic projection of the profile line, the positive side of the profile line The radially medial end point of the projection and the radially medial end point of the orthographic projection corresponding to the bone line are located on the same line.

In some embodiments, on the cross section of the hub, the radial inner end point of the orthographic projection of the bone line corresponds to the end points on both sides of the orthographic projection of the outer contour of the air inlet hole in the circumferential direction of the hub They are respectively connected into a first straight line and a second straight line. The angle formed between the first straight line and the second straight line toward the corresponding air inlet hole is α, and the α satisfies: 120°≤α ≤135°.

In some embodiments, in the radial direction of the hub, the distance between the radial inner end point of the profile line and the center axis of the hub is L ₀ , and the L ₀ satisfies: L ₀ ≥ 0.3R, wherein , R is the radius of the centrifugal wind wheel.

In some embodiments, in the radial direction of the hub, the length of the profile line is L ₁ , and the L ₁ satisfies: 0.3L≤L ₁ ≤0.2R, where L is the blade at the hub The length in the radial direction, R is the radius of the centrifugal wind wheel.

In some embodiments, in the radial direction of the hub, the distance between the radially outer end point of the profile line and the radially inner end point corresponding to the bone line is L ₂ , and the L ₂ satisfies: 1mm≤ L ₂ ≤0.3L, L is the length of the blade in the radial direction of the hub.

In some embodiments, the centrifugal rotor further includes: a reinforcing ring, the reinforcing ring and the hub are arranged at intervals along the axial direction of the hub, and are respectively located at both ends of the length of the blade.

The air treatment equipment according to the embodiment of the second aspect of the present application includes the centrifugal fan according to the embodiment of the first aspect of the present application.

According to the air treatment equipment of the embodiments of the present application, by using the above-mentioned centrifugal fan, the air volume of the air treatment equipment is effectively improved, and the sound quality of the air treatment equipment is ensured at the same time.

In some embodiments, 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.

Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a schematic diagram of a centrifugal wind wheel according to an embodiment of the present application;

Fig. 2 is the enlarged view of A part circled in Fig. 1;

Fig. 3 is another schematic diagram of the centrifugal wind wheel shown in Fig. 1;

Fig. 4 is another schematic diagram of the centrifugal wind wheel described in Fig. 3;

Figure 5 is an enlarged view of the B part circled in Figure 4;

FIG. 6 is a schematic diagram of airflow flow of a centrifugal wind wheel in the related art.

Reference number:

Centrifugal wind wheel 100, first straight line Ω3, second straight line Ω4,

Hub 1, central axis 1a,

Air inlet hole 10, type line Ω1,

Bottom plate part 11, shaft core part 12, connecting part 13,

Blade 2, centrifugal air duct 20, bone line Ω2,

Reinforcing circle 3.

detailed description

The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, but should not be construed as a limitation on the present application.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the application. Furthermore, this application may repeat reference numerals and/or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, this application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

Hereinafter, the centrifugal impeller 100 according to the embodiment of the first aspect of the present application will be described with reference to the accompanying drawings.

As shown in FIG. 1 , the centrifugal wind wheel 100 includes a hub 1 and blades 2 . The hub 1 is formed with a plurality of air inlet holes 10 , and the plurality of air inlet holes 10 are arranged at intervals along the circumference of the hub 1 . Each air inlet hole 10 Through the hub 1, there are a plurality of blades 2, and the plurality of blades 2 are arranged on the hub 1, and the plurality of blades 2 are arranged at intervals along the circumferential direction of the hub 1, and a centrifugal air duct 20 is defined between two adjacent blades 2. The air duct 20 is communicated with the air inlet holes 10 , and the plurality of blades 2 are arranged radially outside the plurality of air inlet holes 10 at intervals, 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 .

As a result, the centrifugal wind wheel 100 rotates, a part of the airflow flows to the inside of the plurality of blades 2 through the air inlet holes 10, and another part of the airflow flows to the inside of the multiple blades 2 through the end of the blade 2 away from the hub 1, and both parts of the airflow pass through the centrifugal The air duct 20 flows out, thereby increasing the air intake area of the centrifugal wind wheel 100, effectively improving the ventilation air volume of the centrifugal wind wheel 100, thereby improving the ventilation efficiency of the centrifugal wind wheel 100, and the hub 1 is suitable for being connected with the motor, The airflow flowing to the inner side of the blade 2 through the air inlet hole 10 can also effectively dissipate heat to the motor, so as to cool the motor. In the description of this application, "plurality" means two or more.

3 and 4 , the number of blades 2 is equal to the number of air inlet holes 10 , then each blade 2 corresponds to one air inlet hole 10 respectively, and each air inlet hole 10 corresponds to one blade 2 respectively, so that The plurality of air inlet holes 10 and the plurality of blades 2 are respectively arranged in a one-to-one correspondence; each blade 2 and the corresponding air inlet hole 10 are arranged opposite to each other in 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 because the centrifugal wind wheel 100 is a rotating part, the air flow out of the air inlet hole 10 can flow into the centrifugal air duct 20 more smoothly for acceleration, so as to avoid the flow field of the centrifugal wind wheel 100 due to The setting of the air inlet hole 10 is unstable and causes abnormal sound, thereby ensuring the stability of the flow field of the centrifugal wind wheel 100, thereby ensuring that no other abnormal sound is generated during the rotation of the centrifugal wind wheel 100, so that the centrifugal wind wheel 100 has a good performance. Sound quality to ensure user experience.

It should be noted that the "outside" direction refers to the direction away from the center axis 1a of the hub 1 in the radial direction of the hub 1, and the opposite direction is defined as "inside".

According to the centrifugal impeller 100 of the embodiment of the present application, by forming a plurality of air inlet holes 10 on the hub 1 , the number of the air inlet holes 10 is equal to the number of the blades 2 , and each air inlet hole 10 is along the corresponding blade 2 . The radially opposite arrangement of the hub 1 not only ensures the structural strength of the centrifugal wind wheel 100, but also effectively improves the ventilation air volume and ventilation efficiency of the centrifugal wind wheel 100. 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 size of the centrifugal wind wheel 100 , so that the centrifugal wind wheel 100 has good applicability and practicability.

The inventors of the present application compared the centrifugal wind rotor 100 of the embodiment of the present application with the centrifugal wind rotor without air inlet holes in the related art, and the results obtained that, under the same rotational speed, the centrifugal wind rotor 100 in the present application compared The air volume of the centrifugal wind wheel in the related art has been significantly improved, and the air volume can be increased by 10%, and it has been verified that the centrifugal wind wheel 100 of the present application does not produce abnormal sound during operation, and the frequency spectrum and hearing are not abnormal. And meet the drop requirements, no safety hazards, with good reliability.

In addition, in some technologies, for the consideration of heat dissipation or weight reduction of the motor, openings are arranged on the contour of the centrifugal wind wheel, and the arrangement of the openings is unfounded and relatively arbitrary. There are 6 openings, so that the air volume of the centrifugal wind wheel is limited. 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 and the corresponding blade 2 are arranged radially opposite to each other along the hub 1, so as to ensure the structural strength of the centrifugal wind wheel 100, and further The air volume is increased, the flow field of the centrifugal wind wheel 100 is stabilized, and other abnormal noises are prevented from being generated by the centrifugal wind wheel 100 .

For example, FIG. 6 shows the difference in the flow state of a centrifugal impeller with six openings in the hub opening in some technologies. In a centrifugal wind rotor with 6 openings, because the openings are too large, if the area formed by the adjacent blades is regarded as an air duct, the difference in the flow direction of the gas flowing into a single air duct will be too large. The airflow deflection angle β2-β1 in the entire air duct (where β2 is the airflow outlet angle, and β1 is the airflow inlet angle) is often around 75°. Such a large airflow change will cause the flow loss of the airflow with a large difference in the flow direction to be more obvious. In this way, the energy of the air flow introduced by the large openings will be offset, so that the air volume cannot be effectively increased; and the air flow flowing into the air inlet hole 10 in this application can gradually flow in the direction of the profile line Ω1 of the blade 2. Due to the Coanda effect of the fluid, The 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.

In addition, for a centrifugal wind rotor running at a high speed, for example, when the diameter is 0.1 m and the rotational speed is 2400 rpm, the centrifugal wind rotor will receive a pulling force of about 3000 times its own mass. Under this premise, the solution of 6 openings in the above technology is even more untenable, because the blade strength is far from meeting the requirements of high-speed operation. In the present application, the number of air inlet holes 10 and the number of blades 2 is 1:1, and the structural strength of the centrifugal wind rotor 100 has been verified by experiments to fully meet the requirements.

Among them, the inventor of the present application has carried out the following experimental verification: select a centrifugal wind wheel with a diameter of 0.13m, and the experimental items are shown in Table 1 below. "Related technology two" refers to a centrifugal wind wheel with 6 openings. It can be clearly seen from the table that at the same rotational speed, the air volume of the centrifugal wind wheel 100 of the present application is significantly improved, and there is no abnormal sound and safety hazard. Compared with the wind rotor, the centrifugal wind rotor 100 of the present application has obvious technical advantages.

Table 1 Comparison of experimental verification results between this application and related technologies

Test items	Related technology one	Related technology two	this application
Air volume	53m 3 /h	55m 3 /h	60m 3 /h
noise	49dB	49.2dB	49.2dB
strength	No breakage at 2400rpm	At 2400rpm, it breaks	No breakage at 2400rpm

For example, in the examples of FIGS. 1 and 3 , the hub 1 includes a bottom plate portion 11 , an axle core portion 12 and a connecting portion 13 , the bottom plate portion 11 is formed into an annular structure, and the bottom plate portion 11 is sleeved on the radial direction of the axle core portion 12 . outside, and 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 , and the radial outer edge of the connecting portion 13 is connected with the bottom plate portion 11 , the radial inner edge of the connecting portion 13 is connected with the shaft core portion 12 . The shaft core portion 2 is adapted to be connected with a motor, so as to be driven by the motor to realize the rotation of the centrifugal wind wheel 100 , a plurality of blades 2 are arranged on the bottom plate portion 11 , and a plurality of air inlet holes 10 are 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 .

In some embodiments, as shown in FIGS. 2 , 4 and 5 , the air inlet hole 10 extends in the radial direction of the hub 1 , the air inlet hole 10 has a profile line Ω1 extending in the radial direction of the hub 1 , and the blade 2 has The 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 diameter corresponding to the orthographic projection of the bone line Ω2 The inner end points 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 radial outer end point of the orthographic projection of each profile line Ω1 and the radial outer end of the orthographic projection of the corresponding bone line Ω2 The inner end points are located on the same straight line, for example, in the example of FIG. 5, on the cross section of the hub 1, the orthographic projection O ₁ of the central axis 1a of the hub 1, the radial outer end point O ₃ of the orthographic projection of the profile line Ω1 and the corresponding bone The radially inner end point _O2 of the orthographic projection of the line Ω2 is located on the same straight line; in other words, on the cross section of the hub 1, the orthographic projection of the axis of the cylinder where the plurality of blades 2 are located, the radially outer side of the orthographic projection of the profile line Ω1 The endpoint and the radially medial endpoint of the orthographic projection of the corresponding bone line Ω2 are located on the same line. Therefore, the position of the air inlet hole 10 is set reasonably, which is beneficial to further ensure the structural strength and the stability of the flow field of the centrifugal wind wheel 100, avoid abnormal noise and potential safety hazards during the rotation of the centrifugal wind wheel 100, and thus ensure the centrifugal wind wheel 100. sound quality and safety of use.

It should be noted that the profile line Ω1 of the air inlet hole 10 can be understood as the center line of the outer contour shape of the orthographic projection of the air inlet hole 10 on the cross section of the hub 1, and the bone line Ω2 of the blade 2 can be understood as the flow line along the blade 2 The cross-section of the wheel hub 1 is perpendicular to the center axis 1a of the wheel hub 1 .

In some embodiments, as shown in FIG. 2 , FIG. 4 and FIG. 5 , the profile line Ω1 is formed as a straight line, and the outer contour of the orthographic projection of the air inlet hole 10 on the cross section of the wheel hub 1 can be symmetrical about the profile line Ω1 ; On the cross section of 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, 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 bone line Ω2 On the same straight line, for example, in the example of FIG. 5, on the cross section of the hub 1, the orthographic projection O ₁ of the central axis 1a of the hub 1, the radial outer end point O ₃ of the orthographic projection of the profile line Ω1, the profile line Ω1 is positive The radial inner end point O ₄ of the projection and the radial inner end point O ₂ 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 is the same as that of the bone line Ω2. The straight line formed by connecting the radially inner end points of the orthographic projection is collinear with the orthographic projection of the profile line Ω1, thereby simplifying the structure of the air inlet hole 10, facilitating processing, and at the same time, it can further effectively weaken the structural strength of the air inlet hole 10 to the centrifugal wind wheel 100 influence, to ensure the reliable use of the centrifugal wind wheel 100.

In addition, the inventors of the present 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, so that the air inlet hole 10 is further reasonably arranged. In some embodiments, as shown in FIG. 5 , on the cross section of the hub 1 , the radial inner end point of the orthographic projection of the bone line Ω2 and the orthographic projection of the outer contour of the corresponding air inlet hole 10 on the circumference of the hub 1 are two points. The side end points are respectively connected into a first straight line Ω3 and a second straight line Ω4, for example, the radial inner end point O ₂ of the orthographic projection of the bone line Ω2 and the orthographic projection of the outer contour of the corresponding air inlet hole 10 are on the circumferential side end point A of the hub 1. ₁ is connected to form a first straight line Ω3, and the radial inner end point _O2 of the orthographic projection of the bone line Ω2 and the orthographic projection of the outer contour of the corresponding air inlet hole 10 are connected to form a _second The angle formed between the straight line Ω4, the first straight line Ω3 and the second straight line Ω4 towards the corresponding air inlet hole 10 is α, and α satisfies 120°≤α≤135°, then the first straight line Ω3 and the second straight line The included angle formed between Ω4 and facing away from the corresponding air inlet hole 10 is also α. Therefore, by setting the included angle α, the setting of the air inlet holes 10 is more reasonable, thereby effectively increasing the air volume of the centrifugal wind wheel 100, and the inventor of the present application has verified through experiments that the included angle α is too large or too small for the centrifugal wind wheel 100. The increase in air volume was not obvious.

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

In some embodiments, as shown in FIGS. 4 and 5 , in the radial direction of the hub 1 , the distance between the radially inner end point of the profile Ω1 and the central axis 1a of the hub 1 is L ₀ , such as in the example of FIG. 5 . In the radial direction of the hub 1, the distance between the radial inner end O ₄ of the profile Ω1 and the central axis 1a of the hub 1 is L ₀ , and L ₀ satisfies L ₀ ≥ 0.3R, where R is the centrifugal fan 100 The radius of 100, that is, L ₀ is greater than or equal to 30% of the radius of the centrifugal wind wheel 100, so as to avoid excessively setting the air inlet holes 10 to weaken the structural strength of the centrifugal wind wheel 100, and effectively ensure the structural strength of the centrifugal wind wheel 100 when it rotates.

Optionally, in the radial direction of the hub 1, the distance L ₀ 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 L ₀ can be 0.33R, or 0.35R etc.

It can be understood that, when the centrifugal wind wheel 100 includes the reinforcement ring 3, as shown in FIG. 4, the radius of the centrifugal wind wheel 100 can 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.

In some embodiments, as shown in FIG. 4 and FIG. 5 , in the radial direction of the hub 1 , the length of the profile Ω1 is L ₁ , and the length of the profile Ω1 may be the radial inner end point O ₄ of the profile Ω1 and the diameter of Ω1 The radial distance between the inward end points O ₃ , that is, the length of the air inlet hole 10 in the radial direction of the hub 1, L ₁ satisfies 0.3L≤L ₁ ≤0.2R, where L is the length of the blade 2 in the radial direction of the hub 1 , R is the radius of the centrifugal wind wheel 100, that is, L ₁ 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 L ₁ is less than or equal to 20% of the radius of the centrifugal wind wheel 100 to ensure centrifugal Structural strength of the wind turbine 100 .

Optionally, in the radial direction of the hub 1 , the length L ₁ of the profile Ω1 satisfies 0.3L<L ₁ <0.2R, so as to effectively improve the air volume of the centrifugal rotor 100 on the premise of ensuring the structure of the centrifugal rotor 100 .

In some embodiments, as shown in FIGS. 4 and 5 , 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 bone line Ω2 is L ₂ , for example at In the example of Fig. 5, in the radial direction of the hub ₁ , the distance between the radially outer end point _O3 of the profile line Ω1 and the radially inner end point _O2 of the corresponding bone line _Ω2 is L2, then the distance L2 is the distance The shortest radial distance between the air hole 10 and the corresponding blade 2, where L ₂ satisfies 1mm≤L ₂ ≤0.3L, L is the length of the blade 2 in the radial direction of the hub 1, that is, L ₂ is greater than or equal to 1mm and L ₂ is less than or equal to 30% of the radial length of the blade 2, so as to ensure the power of the centrifugal wind wheel 100, so that the centrifugal wind wheel 100 has a good effect of rotating work.

Optionally, in the radial direction of the hub 1, the distance L ₂ between the radially outer end point of the profile line Ω1 and the radially inner end point of the corresponding bone line Ω2 satisfies 1 mm<L ₂ <0.3L.

In some embodiments, as shown in FIG. 1 and FIG. 3 , the centrifugal rotor 100 further includes a reinforcing ring 3 , the reinforcing ring 3 and the hub 1 are arranged at intervals along the axial direction of the hub 1 , and the reinforcing ring 3 and the hub 1 are respectively located on the blades 2 at both ends of the length, each blade 2 is connected between the hub 1 and the reinforcing 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 reinforcing ring 3, thereby improving the centrifugal wind. Structural strength of wheel 100.

The air treatment equipment according to the embodiment of the second aspect of the present application includes the centrifugal wind wheel 100 according to the embodiment of the first aspect of the present application. Wherein, the air treatment equipment may be an air conditioner, a dehumidifier, a humidifier, or an air purifier, etc. Of course, the air treatment equipment may also be a combination of the above at least two kinds of equipment.

According to the air treatment equipment of the embodiment of the present application, by using the centrifugal fan 100 described above, the air volume of the air treatment equipment is effectively improved, and the sound quality of the air treatment equipment is ensured at the same time.

In some embodiments, the air treatment equipment is an air conditioner, and the air treatment equipment has a fresh air duct, which can introduce outdoor fresh air into the room to realize indoor and outdoor air circulation, and the centrifugal fan 100 is arranged in the fresh air duct. For example, the air conditioner has a fresh air module. Under the limitation of the size of the fresh air module, the strength of the mechanism and other factors, the centrifugal wind wheel 100 can effectively improve the ventilation air volume and ventilation efficiency of the air conditioner. sound quality.

It is understandable that a heat exchange device may not be installed in the fresh air duct. At this time, the fresh air duct has no heat exchange function and does not participate in cooling and heating. Of course, a heat exchange device can also be installed in the fresh air duct. At this time, the fresh air duct not only It has fresh air function and heat exchange function.

Other structures and operations of the air treatment equipment according to the embodiments of the present application are known to those of ordinary skill in the art, and will not be described in detail here.

In the description of this application, it is to be understood that the terms "central", "lateral", "length", "width", "thickness", "inner", "outer", "axial", "radial" The orientation or positional relationship indicated by , "circumferential direction", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific Orientation, construction and operation in a particular orientation, and therefore should not be construed as a limitation of the present application.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," or the like, is meant to incorporate the embodiment. A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims (10)

1. A centrifugal wind wheel, comprising:

   a wheel hub, a plurality of air inlet holes are formed on the wheel hub, the plurality of air inlet holes are arranged at intervals along the circumferential direction of the wheel hub, and each of the air inlet holes penetrates the wheel hub;

   a plurality of blades, the plurality of blades are all arranged on the hub, the plurality of blades are arranged at intervals along the circumferential direction of the hub and are arranged at intervals on the radial outer side of the plurality of air inlet holes, The number of the blades is equal to the number of the air inlet holes, and each of the blades and the corresponding air inlet holes are arranged opposite to the corresponding air inlet holes in the radial direction of the hub.
2. The centrifugal rotor according to claim 1, wherein the air inlet holes extend in a radial direction of the hub and have a profile extending in the radial direction of the hub, and the blades have a diameter along the hub. On the cross section of the hub, the orthographic projection of the central axis of the hub, the radially outer end point of the orthographic projection of the profile line, and the radially inner end point corresponding to the orthographic projection of the bone line on the same straight line.
3. The centrifugal rotor according to claim 2, wherein the profile line is formed as a straight line, and on the cross section of the hub, the orthographic projection of the central axis of the hub and the radial outer end point of the orthographic projection of the profile line , the radial inner end point of the orthographic projection of the profile line and the radial inner end point corresponding to the orthographic projection of the bone line are located on the same straight line.
4. The centrifugal wind wheel according to any one of claims 1-3, wherein, on the cross section of the hub, the radial inner end point of the orthographic projection of the bone line corresponds to the outer contour of the air inlet hole The orthographic projections of the two end points on the circumferential direction of the hub are respectively connected into a first straight line and a second straight line, and the clips formed between the first straight line and the second straight line toward the corresponding air inlet hole The angle is α, and the α satisfies: 120°≤α≤135°.
5. The centrifugal fan according to any one of claims 1-4, wherein, in the radial direction of the hub, the distance between the radial inner end point of the profile line and the central axis of the hub is L ₀ , The L ₀ satisfies: L ₀ ≥ 0.3R, where R is the radius of the centrifugal wind wheel.
6. The centrifugal rotor according to any one of claims 1-5, wherein, in the radial direction of the hub, the length of the profile line is L ₁ , and the L ₁ satisfies: 0.3L≤L ₁ ≤0.2 R, where L is the length of the blade in the radial direction of the hub, and R is the radius of the centrifugal rotor.
7. The centrifugal impeller according to any one of claims 1-6, wherein, in the radial direction of the hub, between the radially outer end point of the profile line and the radially inner end point corresponding to the bone line The distance is L ₂ , and the L ₂ satisfies: 1 mm≦L ₂ ≦0.3L, and L is the length of the blade in the radial direction of the hub.
8. The centrifugal wind wheel according to any one of claims 1-7, wherein, further comprising:

   A reinforcing ring, the reinforcing ring and the hub are arranged at intervals along the axial direction of the hub, and are respectively located at both ends of the length of the blade.
9. An air treatment equipment, comprising the centrifugal fan according to any one of claims 1-8.
10. The air treatment equipment according to claim 9, wherein the air treatment equipment is an air conditioner and has a fresh air duct, and the centrifugal fan wheel is arranged in the fresh air duct.

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