WO2021147497A1

WO2021147497A1 - Flow guide device, fan assembly, and electric appliance

Info

Publication number: WO2021147497A1
Application number: PCT/CN2020/130044
Authority: WO
Inventors: 刘华; 马屈杨; 池晓龙; 苏玉海; 张碧瑶; 夏凯
Original assignee: 珠海格力电器股份有限公司
Priority date: 2020-01-20
Filing date: 2020-11-19
Publication date: 2021-07-29
Also published as: CN111441990A

Abstract

A flow guide device, a fan assembly, and an electric appliance. The flow guide device (1) comprises: a first flow guide portion (11) having a flow guide cavity, wherein the flow guide cavity has an axis (1d), and an inlet (1a) and an outlet (1b) that are located at the two ends of the first flow guide portion (11) along the axis (1d); and a second flow guide portion (12), wherein the second flow guide portion is connected to the outer edge of the inlet (1a) of the first flow guide portion and extends along a direction from the inlet (1a) to the outlet (1b), so that the first flow guide portion (11) and the second flow guide portion (12) are connected to form a flanging portion (1e), the sectional mold line of the flanging portion (1e) is in the shape of a curve, and a section is obtained by sectioning a plane where the axis (1d) is located. A fan assembly comprises a fan (2) and the flow guide device (1), and the flow guide device is provided at the air inlet of the fan. An electric appliance comprises the fan assembly. By providing the flanging portion with the sectional mold line being in the shape of the curve at the inlet of the flow guide device, the present invention can realize a better flow guide effect, and facilitates improving the air intake condition of the fan.

Description

Flow deflector, fan assembly and electrical appliances

Cross-references to related applications

This disclosure is based on a Chinese application with an application number of 202010063871.3 and a filing date of January 20, 2020, and claims its priority. The disclosure of the Chinese application is hereby incorporated into this disclosure as a whole.

Technical field

The present disclosure relates to the technical field of electrical appliances, in particular to a deflector, a fan assembly and an electrical appliance.

Background technique

In electrical appliances such as air conditioners and range hoods, fans and deflectors are generally provided. For example, the deflectors are arranged at the air inlet of the fan to guide the airflow entering the fan to optimize the air intake conditions of the fan.

How to use the deflector to achieve a better diversion effect, so as to more effectively improve the air intake conditions of the fan, and improve the performance of the fan, has always been a problem.

Summary of the invention

The first aspect of the present disclosure provides a flow deflector, which includes:

The first guiding part has a guiding cavity, the guiding cavity has an axis and an inlet and an outlet located at both ends of the first guiding part along the axis; and

The second guide portion is connected to the outer edge of the inlet and extends along the direction from the inlet to the outlet, so that the first guide portion and the second guide portion are connected to form a flanged portion;

Wherein, the cross-sectional profile of the flanging portion is curved, and the cross-section is a cross-section cut along the plane where the axis is located.

In some embodiments, the cross-sectional profile of the first air guiding part and/or the second air guiding part is arc-shaped, parabolic or saddle-shaped.

In some embodiments, the cross-sectional profile of the first diversion portion and/or the cross-sectional profile of the second diversion portion is arc-shaped with a radius of r, and the outlet diameter of the first diversion portion is D, r and D The relationship between them is 10≤D/2r≤16.67; or, the cross-sectional profile of the first diversion portion and/or the cross-sectional profile of the second diversion portion has a first axial length of 2a and a second axial length of b The first axis and the second axis are one and the other of the long axis and the short axis respectively, and the relationship between a and b is 0.15≤a/b≤2.

In some embodiments, the relationship between a and b is 0.15≤a/b≤0.95 or 1.05≤a/b≤2.

In some embodiments, the cross-sectional profile line of the first air guiding part and the cross-sectional profile line of the second air guiding part are symmetrical or asymmetric with respect to the reference line, and the reference line is connected through the first air guiding part and the second air guiding part. A straight line at and parallel to the axis.

In some embodiments, the cross-sectional profile of the flanging portion has a circular arc shape, an elliptical arc shape, a parabola shape, or a saddle shape.

In some embodiments, the cross-sectional profile of the flanging portion is in the shape of an arc, and the arc length of the flanging portion is greater than or equal to 0.25 times the entire circumference of the equal radius, and less than or equal to 0.5 times the entire circumference of the equal radius; or , The cross-sectional profile of the flanging part is an elliptical arc, and the arc length of the flanging part is greater than or equal to 0.25 times of the circumference of the ellipse of the same specification, and less than or equal to 0.5 times of the circumference of the ellipse of the same specification.

A second aspect of the present disclosure provides a fan assembly, which includes a fan and the deflector of the present disclosure, and the deflector is arranged at the inlet of the fan.

In some embodiments, the outlet of the first air guide is inserted into the air inlet of the fan.

In some embodiments, the fan is a mixed flow fan, an axial flow fan, or a centrifugal fan.

In some embodiments, the fan is a mixed flow fan, wherein the fan includes 6-20 moving blades; and/or, the fan includes 6-25 stationary blades.

In some embodiments, the fan includes 15 stationary blades.

A third aspect of the present disclosure provides an electrical appliance, which includes the fan assembly of the present disclosure.

In some embodiments, the electrical appliance is an air conditioner or a range hood.

In the present disclosure, a flanging portion with a curved cross-section profile is arranged at the inlet of the deflector, which can achieve a better diversion effect, is beneficial to improve the air intake condition of the fan, and enhance the performance of the fan.

Through the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings, other features and advantages of the present disclosure will become clear.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

Fig. 1 shows a schematic structural diagram of a fan assembly in some embodiments of the present disclosure.

Fig. 2 shows a longitudinal section view of Fig. 1.

Fig. 3 shows a longitudinal section view of the deflector in Fig. 2.

Fig. 4 shows a longitudinal sectional view of the deflector in other embodiments of the present disclosure.

Fig. 5 shows a longitudinal sectional view of the deflector in still other embodiments of the present disclosure.

Fig. 6 shows a longitudinal sectional view of the deflector in still other embodiments of the present disclosure.

Fig. 7 shows a schematic diagram of a simulation of a deflector without a second deflector.

Fig. 8 shows a schematic diagram of a simulation of a deflector with a semi-circular arc-shaped flanging portion.

Detailed ways

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without carrying out creative work fall within the protection scope of the present disclosure.

The technologies, methods, and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part of the authorization specification.

The technical features involved in the different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

In addition, in the description of the present disclosure, it should be understood that the use of terms such as “first” and “second” to define parts is only for the convenience of distinguishing the corresponding parts. Unless otherwise stated, the above terms are not There is no special meaning, and therefore cannot be understood as a limitation on the protection scope of the present disclosure.

In the description of the present disclosure, the orientation words "upper" and "lower" are defined based on the flow direction of the airflow, the inflow direction is "upper", and the outflow direction is "lower".

Figures 1-6 show the structural schematic diagrams of the fan assembly and its deflector of the present disclosure.

1, the fan assembly is used in electrical appliances such as air conditioners or range hoods, and includes a fan 2 and a deflector 1. The deflector 1 is arranged at the air inlet of the fan 2 and is used to guide the airflow entering the fan 2.

In some embodiments, the fan 2 is an axial fan, a centrifugal fan, or a hybrid fan. For the convenience of description, the following only takes the fan 2 as a mixed flow fan as an example for description.

The mixed flow fan is a fan between the axial flow fan and the centrifugal fan, which makes the air do both centrifugal movement and axial movement. Because the movement of the air in the mixed flow fan is a mixture of axial flow and centrifugal movement, it is called "mixed flow".

The mixed flow fan combines the characteristics of the axial flow fan and the centrifugal fan. It not only has a wind pressure coefficient higher than that of an axial flow fan, but also has a flow coefficient larger than that of a centrifugal fan, and has the characteristics of simple and convenient installation. The mixed flow fan used in air conditioners or range hoods can better meet the air volume and pressure head indicators, and achieve a more ideal high wind-to-noise ratio. Among them, the pressure head refers to the energy per unit weight of the fluid. Wind-to-noise ratio refers to the ratio of air volume to noise.

Figure 2 shows a structural form when the fan 2 is a mixed flow fan. Among them, the fan 2 includes a main body part 2a and a derotation part 2b arranged in sequence along the air flow direction.

The main body 2a is used to drive the air flow to flow through the fan 2, and it includes an impeller 21, a first housing 22, and the like. The first housing 22 has a generally trumpet-shaped cavity inside, the small end of which is located upstream of the large end along the flow direction of the airflow, and the opening at the small end forms the air inlet of the fan 2. The impeller 21 is rotatably arranged in the first housing 22, and is used to suck gas into the fan 2 and make the gas perform a mixed movement of two kinds of axial flow and centrifugal movement. The impeller 21 includes a first blade 211 and a first hub 212. The first blade 211 is a moving blade, which is arranged on the first hub 212 and rotates together with the first hub 212. In some embodiments, the impeller 21 includes 6-20 first blades 211.

The de-rotation part 2b is used to guide the air outlet of the fan 2 and reduce or even eliminate the radial sub-velocity of the air flow out of the main body part 2a to reduce the lateral air outlet of the fan 2 and make the air outlet of the fan 2 better. Mostly concentrated in the central area of the air outlet. The de-rotation part 2b includes a second blade 23, a second hub 24, a second housing 25, and the like. The second housing 25 is connected to the lower end of the first housing 22 and has a hollow chamber having a substantially drum shape. The opening at the lower end of the second housing 25 forms the air outlet of the fan 2. The second hub 24 is fixedly disposed in the hollow cavity of the second housing 25. The second blade 23 is a stationary blade, which is arranged on the second hub 24 and is used to guide the air flow out of the fan 2 after the action of the impeller 21. In some embodiments, the derotation portion 2b includes 6-25 (for example, 15) second blades 23.

Both the air inlet and the air outlet of the fan 2 are circular openings.

In Fig. 2, the maximum diameter of the impeller 21 is denoted as D1. The maximum diameter of the second housing 25 is denoted as D2. The minimum radius of the first hub 212 is denoted as R1. The maximum radius of the second hub 24 is denoted as R2. The height of the second blade 23 is denoted as H.

Referring to Figures 1-2, in some embodiments, the deflector 1 is configured as a deflector, butted with the air inlet of the fan 2, or inserted into the air inlet of the fan 2, to guide the airflow into the fan 2, and to the fan 2 Flow air is guided.

As shown in FIGS. 3-6, the deflector 1 includes a first deflector 11 and a second deflector 12 connected to each other, and the second deflector 12 is arranged at the outer edge of the inlet 1a of the first deflector 11, In addition, the outer edge of the inlet 1a of the first guide portion 11 is flanged and bent, and is connected with the first guide portion 11 to form a flanging portion 1e.

Wherein, the first guide portion 11 is configured as a revolving body, and a guide cavity is arranged inside the guide cavity. The guide cavity has an axis 1d and an inlet 1a and an outlet 1b located at both ends of the first guide portion 11 along the axis 1d. Both the inlet 1a and the outlet 1b are circular openings. The diameter of the outlet 1b is D. When considering the wall thickness of the first air guide 11, the diameter D of the outlet 1b refers to the inner diameter of the first air guide 11 at the outlet 1b.

The second air guide 12 is connected to the outer edge of the inlet 1 a of the first air guide 11 and extends in a direction from the inlet 1 a of the first air guide 11 to the outlet 1 b of the first air guide 11. At this time, the second guide portion 12 is a flanging of the first guide portion 11, and the second guide portion 12 is bent downward relative to the outer edge of the inlet 1 a of the first guide portion 11. The connection between the second guide portion 12 and the first guide portion 11 is the point farthest from the outlet 1b of the flanging portion 1e, or in other words, the connection between the second guide portion 12 and the first guide portion 11 is The highest point of the flanging portion 1e.

The airflow enters the deflector 1 from the first deflector 11, that is, the first deflector 11 is the inlet structure of the deflector 1.

3-6, in some embodiments, in the flow direction of the airflow, the deflector 1 does not include other structural components located downstream of the first deflector 11. In this case, the first deflector 11 is not only used as a guide The inlet structure of the deflector 1 is also used as the outlet structure of the deflector 1. The inlet 1a and the outlet 1b of the first deflector 11 are the inlet and the outlet of the deflector 1, respectively. The airflow flows from the first deflector 11 When it flows out, it has flowed out of the deflector 1 and entered the fan 2. At this time, the outlet 1b is inserted into the air inlet of the fan 2, or the outlet 1b is butted with the air inlet of the fan 2. The diameter D of the outlet 1b is adapted to the diameter of the air inlet (specifically the inner diameter of the fan 2 at the air inlet). For example, when the outlet 1b is butted with the air inlet of the fan 2, the diameter D of the outlet 1b is the same as the diameter of the air inlet equal.

In other embodiments, in addition to the first deflector 11, the deflector 1 also includes other structural components connected downstream of the first deflector 11 along the flow direction of the airflow. At this time, the first deflector 11 is no longer As the outlet structure of the deflector 1, the air flow out of the first deflector 11 has not yet entered the fan 2, but needs to flow through other structural components of the deflector 1 downstream of the first deflector 11.

Referring to FIGS. 1-6, the cross-sectional profile of the first air guiding portion 11 is curved, such as an inwardly convex arc, parabola, or saddle shape. At the same time, the cross-sectional profile of the second guide portion 12 is also curved, such as an arc, a parabola, or a saddle shape. In this case, the flange portion 1e formed by connecting the two has a curved cross-sectional profile line. In the present disclosure, "cross-section" refers to the cross-section obtained along the plane where the axis 1d is located; "cross-section profile" refers to the contour line of the inner or outer wall of the section; saddle-shaped curve refers to the saddle surface (also called double The trajectory of the outer edge of the curved paraboloid, expressed by the formula is y=x ² /c ² -z ² /d ² , c and d are constants, and when c and d take different values, different saddle-shaped curves are obtained.

Based on the above arrangement, the second guide part 12 can cooperate with the first guide part 11 to achieve a better guide effect, improve the air intake conditions of the fan 2, optimize the uniformity of the airflow velocity in the internal flow passage of the fan 2, and reduce the fan 2 The air flow in the internal flow channel is separated to improve the aerodynamic performance of the fan 2 and reduce the noise intensity of the fan 2.

In particular, the second air guiding part 12 is arranged to be folded relative to the outer edge of the inlet 1a of the first air guiding part 11, and the cross-sectional profile of the second air guiding part 12 is set to be curved, which can enhance the alignment at the first The direction interference effect of the airflow downstream and outside of the guide portion 11 enables this part of the airflow to flow to the first guide portion 11 more evenly and smoothly, and further flow into the fan 2 more evenly and smoothly under the guidance of the first guide portion 11 In this way, the flow separation and air impact intensity at the entrance of the fan 2 and inside the fan 2 are effectively reduced, air vortexes are reduced, and the uniformity of flow velocity distribution is enhanced, thereby effectively improving the aerodynamic performance of the fan 2 and increasing the wind-to-noise ratio of the fan 2. In addition, when the deflector 1 is used in the whole machine, the housing of the whole machine and the entrance of the deflector 1 form a corner area, and the second deflector is folded and bent relative to the outer edge of the inlet 1a of the first deflector 11 The guide portion 12, and the cross-sectional profile of the second guide portion 12 is set to a curved shape, which is also convenient for guiding the airflow in the corner area, reducing the accumulation of airflow in the corner area to form a vortex area, reducing the flow loss in the corresponding area, and indirectly Optimize the air intake conditions of the fan 2 to reduce the air flow wind force and improve the aerodynamic performance.

3-6, in some embodiments, the cross-sectional profile of the first guide portion 11 and the second guide portion 12 are symmetrical about the reference line 1c; in other embodiments, the first guide portion 11 and the second guide portion 12 The cross-sectional profile of the flow portion 12 is asymmetric with respect to the reference line 1c. The reference line 1c is a straight line passing through the junction of the first air guiding portion 11 and the second air guiding portion 12 and parallel to the axis 1d of the first air guiding portion 11. Among them, it is not difficult to understand that when symmetrical, the cross-sectional profile of the first guide portion 11 and the second guide portion 12 are not only the same in line type, but also in the same curve specification. For example, they are arcs with equal radius and equal circumference. When asymmetric, the cross-sectional profile of the first diversion portion 11 and the second diversion portion 12, or line types are different, for example, one of them is arc-shaped and the other is parabolic, or the line types are the same , But the curve specifications are different. For example, although both are arcs, the radius and/or circumference of the two are different.

Among them, FIGS. 3-5 show some embodiments when the cross-sectional profile lines of the first guide portion 11 and the second guide portion 12 are symmetrical with respect to the reference line 1c, and FIG. 6 shows the first guide portion 11 and Part of the embodiment when the cross-sectional profile of the second air guide 12 is asymmetric with respect to the reference line 1c.

As shown in Figure 3, in this embodiment, the cross-sectional shape of the first guide portion 11 and the second guide portion 12 are symmetrical about the reference line 1c, and both are arcs with a radius of r, where the first guide The flow portion 11 protrudes inward (that is, toward the radial inner side of the first guide portion 11), and the second guide portion 12 protrudes outward (that is, toward the radial outer side of the first guide portion 11). And, it can be seen from FIG. 3 that in this embodiment, the arc lengths of the first guide portion 11 and the second guide portion 12 are equal, and both are equal to 0.25 times the entire circumference of the same radius, that is, both have a radius of r 1/4 arc shape. Based on this, as shown in FIG. 3, the cross-sectional profile of the flanging portion 1e is a semicircular arc with a radius of r, that is, the cross-sectional profile of the flanging portion 1e is a circular arc with a radius of r, and the flanging The arc length of the portion 1e is equal to 0.5 times the entire circumference of the equal radius, and expressed by the formula is the arc length L=0.5*2πr of the flanging portion 1e.

Studies have shown that the deflector 1 with the semi-circular arc-shaped flanging portion 1e is especially suitable for the fan 2 with at least one of the following parameters:

The maximum diameter D1 of the impeller 21 is 135-145mm;

The maximum diameter D2 of the second housing 25 is 165-170mm;

The ratio between the maximum radius R2 of the second hub 24 and the minimum radius R1 of the first hub 212

7.5-9;

The maximum diameter 2*R2 of the second hub 24 is 110-120mm;

The height H of the second blade 23 is 45-55 mm.

In order to further improve the diversion effect, in this embodiment, the relationship between the arc radius r and the diameter D of the outlet 1b is set to 10≤D/2r≤16.67, which can effectively increase the air volume and reduce the noise, thereby effectively improving the wind Noise level.

Figures 7 and 8 respectively show the deflector without the second deflector 12 and with the second deflector 12 and the second deflector is connected with the first deflector 11 to form a semi-circular arc flanging A schematic diagram of the simulation of the deflector 1 of the section 1e. Comparing Figures 7 and 8, it can be seen that, compared with the deflector without the second deflector 12, the deflector 1 with the semi-circular arc-shaped flanging portion 1e has a more rapid velocity distribution in the radial direction of the deflector 1 It is uniform, and the flow separation of the airflow in the deflector 1 is improved, and the vortex is reduced, which is beneficial to increase the air volume and reduce the noise.

In the embodiment shown in FIGS. 4 and 5, the cross-sectional profile lines of the first guide portion 11 and the second guide portion 12 are still symmetrical about the reference line 1c, but they are no longer arc-shaped, but elliptical. arc. In addition, the arc lengths of the first guide portion 11 and the second guide portion 12 are both equal to 0.25 times the circumference of a complete ellipse of the same specification, that is, both are in the shape of a quarter elliptical arc. In this case, the cross-sectional profile of the flanging portion 1e is no longer in the shape of a semicircular arc, but in a semi-elliptical arc shape, that is, the arc length of the flanging portion 1e is equal to 0.5 times the circumference of a full ellipse of the same specification.

Compared with the arc-shaped first guide part 11, the elliptical arc-shaped first guide part 11 is more conducive to guiding the airflow along the axial direction, reducing the accumulation of airflow near the hub and reducing the airflow near the hub. The vortex area appears, so as to affect the smoothness of air flow and increase the risk of noise.

Referring to Figure 4-5, one of the major axis and minor axis of the ellipse is called the first axis, the other is called the second axis, and the length of the first axis is set to 2a, and the length of the second axis is set to b, to facilitate description. Specifically in Figures 4 and 5, the first axis is parallel to the axis 1d; the second axis is perpendicular to the axis 1d. At the same time, based on this, it can be understood that the aforementioned "same specification" refers to having the same first shaft and second shaft.

Research has shown that the deflector 1 with the semi-elliptical arc flanging portion 1e is especially suitable for the fan 2 with at least one of the following parameters:

The maximum diameter D1 of the impeller 21 is 148-155mm;

The maximum diameter D2 of the second housing 25 is 165-170mm;

Is 6-7.35;

The maximum diameter 2*R2 of the second hub 24 is 90-100mm;

The height H of the second blade 23 is 30-36 mm.

In order to better optimize the air intake conditions of the fan 2, reduce the flow separation of the internal air flow of the fan 2, improve the aerodynamic performance of the fan 2, and reduce the vortex noise and discrete noise of the fan 2, some embodiments set the relationship between a and b to 0.15 ≤a/b≤2. For example, in the embodiment shown in FIG. 4, 0.15≤a/b≤0.95. For another example, in the embodiment shown in FIG. 5, 1.05≤a/b≤2.

As shown in FIG. 6, in this embodiment, the cross-sectional profile lines of the first air guiding part 11 and the second air guiding part 12 are no longer symmetrical with respect to the reference line 1c, but the cross-sectional profile lines of the first air guiding part 11 are A saddle-shaped curve, and the cross-sectional profile of the second diversion portion 12 is a circular arc-shaped curve.

The deflector 1 shown in Fig. 6 is an improvement on the basis of the semicircular deflector 1 shown in Fig. 3, which is suitable for the fan 2 corresponding to the deflector 1 shown in Fig. 3, and is especially suitable for

For example, if the diameter of the air inlet of the semi-circular deflector shown in Figure 3 (corresponding to the diameter of the air inlet of the semi-circular deflector shown in Figure 3, the diameter of the air inlet is 15%-25% smaller than the corresponding fan in the embodiment of Figure 3) The marked D) is 108mm, then the diameter of the air inlet of the saddle-shaped deflector shown in Fig. 6 is 108*75％mm～108*85％mm, that is, 81-91.8mm.

The cross-sectional profile of the first air guiding portion 11 is set to a saddle shape. Compared with the case where the cross-sectional profile of the first air guiding portion 11 is in a circular arc shape, since the saddle shape has a greater inclination relative to the circular arc shape, the In the case of the same outlet area (the area of the outlet 1b), when the cross-sectional profile of the first guide portion 11 is saddle-shaped, the inlet area (the area of the inlet 1a) is larger, which is more conducive to the airflow outside the deflector 1 The introduction of, which not only helps to increase the air intake, but also helps to increase the flow rate of the airflow when passing through the deflector 2, and also helps prevent the airflow from accumulating on the inner wall of the deflector 1 and reduce the risk of vortex formation. This is more conducive to improving the air inlet conditions of the fan 2 and increasing the wind-to-noise ratio of the fan 2.

In the present disclosure, the structural form of the flanging portion 1e is not limited to those shown in FIGS. 3-6. The following lists only a part of other feasible embodiments.

For example, as a modified example of the embodiment shown in FIG. 3, the cross-sectional profile of the second guide portion 12 is no longer 1/4 arc, but shorter than 1/4 arc. At this time, the flange portion 1e is not It is a semi-circular arc again, and its circumference L is no longer 0.5 times the entire circumference of the same radius, but is greater than 0.25 times the entire circumference of the same radius, and less than 0.5 times the entire circumference of the same radius.

For another example, as a modified example of the embodiment shown in FIG. 4, the cross-sectional profile lines of the first air guide portion 11 and the second air guide portion 12 are no longer elliptical arc curves of the same specification, but become the second axis length. Different elliptical arc curves. At this time, if the length of the second axis of the first guide portion 11 is b1 and the length of the second guide portion 12 is b2, then the dimension of the flange portion 1e perpendicular to the axis 1d is

For another example, in some other embodiments, the cross-sectional profile lines of the first diversion portion 11 and the second diversion portion 12 are parabolic symmetrical with respect to the reference line 1c, and the cross-sectional profile of the flanging portion 1e is semi-parabolic. The formula is expressed as y=kx ² +n, k<0, or the cross-sections of the first air guiding portion 11 and the second air guiding portion 12 are parabolic asymmetric with respect to the reference line 1c. Arranging the first guide portion 11 in a parabolic shape is beneficial to reduce the accumulation of airflow near the hub, reduce noise, improve the smoothness of air flow, and be able to adapt to different intake conditions more flexibly.

The above are only exemplary embodiments of the present disclosure and are not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection of the present disclosure. Within range.

Claims

A deflector (1), including:

The first guide portion (11) has a guide cavity, the guide cavity has an axis (1d) and inlets (1a) located at both ends of the first guide portion (11) along the axis (1d) And exit (1b); and

The second guide portion (12) is connected to the outer edge of the inlet (1a) and extends along the direction from the inlet (1a) to the outlet (1b), so that the first guide portion (11 ) Is connected with the second guide portion (12) to form a flanging portion (1e);

Wherein, the cross-sectional profile of the flanging portion (1e) is curvilinear, and the cross-section is a cross-section cut along the plane where the axis (1d) is located.
The deflector (1) according to claim 1, wherein the cross-sectional profile of the first deflector (11) and/or the second deflector (12) is arc, parabolic or Saddle shape.
The deflector (1) according to claim 1, wherein the cross-sectional profile of the first deflector (11) and/or the cross-sectional profile of the second deflector (12) has a radius of The arc shape of r, the diameter of the outlet (1b) of the first guide portion (11) is D, and the relationship between r and D is 10<D/2r≤16.67; or, the first guide portion The cross-sectional profile line of (11) and/or the cross-sectional profile line of the second guide portion (12) is an elliptical arc with a first axis length of 2a and a second axis length of b. The second axis is one and the other of the long axis and the short axis, respectively, and the relationship between a and b is 0.15≤a/b≤2.
The deflector (1) according to claim 3, wherein the relationship between a and b is 0.15≤a/b≤0.95 or 1.05≤a/b≤2.
The deflector (1) according to claim 1, wherein the cross-sectional profile of the first deflector (11) and the cross-sectional profile of the second deflector (12) are relative to the reference line (1c). ) Symmetrical or asymmetrical, the reference line (1c) is a straight line passing through the connection of the first guide portion (11) and the second guide portion (12) and parallel to the axis (1d) .
The deflector (1) according to any one of claims 1-5, wherein the cross-sectional profile of the flanging portion (1e) is in the shape of a circular arc, an elliptical arc, a parabola or a saddle shape.
The deflector (1) according to claim 6, wherein the cross-sectional profile of the flanging portion (1e) is in the shape of a circular arc, and the arc length of the flanging portion (1e) is greater than or equal to the same radius 0.25 times the circumference and less than or equal to 0.5 times the full circumference of the same radius; or, the cross-sectional profile of the flanging portion (1e) is an elliptical arc, and the arc length of the flanging portion (1e) is greater than Or equal to 0.25 times the circumference of the same size ellipse, and less than or equal to 0.5 times the circumference of the same size ellipse.
A fan assembly, comprising a fan (2), and further comprising the deflector (1) according to any one of claims 1-7, the deflector (1) is arranged at the inlet of the fan (2) tuyere.
The fan assembly according to claim 8, wherein the outlet (1b) of the first guide portion (11) is inserted into the air inlet of the fan (2); or, the first guide portion (11) The outlet (1b) of the fan is connected to the air inlet of the fan (2).
The fan assembly according to claim 8, wherein the fan (2) is a mixed flow fan, an axial flow fan or a centrifugal fan.
The fan assembly according to claim 10, wherein the fan (2) is a mixed flow fan, wherein the fan (2) includes 6-20 moving blades; and/or, the fan (2) includes 6 -25 stationary blades.
The fan assembly according to claim 11, wherein the fan (2) includes 15 stationary blades.
An electrical appliance comprising the fan assembly according to any one of claims 8-12.
The electrical appliance according to claim 13, wherein the electrical appliance is an air conditioner or a range hood.