CN212250586U - Diffuser assembly, power system, fan - Google Patents

Abstract

The utility model provides a diffuser subassembly, driving system, fan, a diffuser subassembly includes the diffuser and covers the shell on the diffuser, be formed with first water conservancy diversion face on the partial global of diffuser, be formed with first water conservancy diversion passageway between the inboard wall of first water conservancy diversion face and shell, be provided with a plurality of water conservancy diversion pieces along the circumference of the medial surface of first water conservancy diversion face and/or shell, a plurality of water conservancy diversion pieces will be said first water conservancy diversion passageway interval for a plurality of second water conservancy diversion passageways; the air inlet end of the guide vane is provided with an air inlet cut angle B, the numerical value of the air inlet cut angle B is [30 degrees ] and 40 degrees ], the air outlet end of the guide vane is provided with an air outlet cut angle A, and the numerical value of the air outlet cut angle A is [80 degrees ] and 100 degrees ]. The utility model provides a diffuser subassembly's noise is little, and the air output is big.

Description

Diffuser assembly, power system, fan

Technical Field

The utility model relates to the technical field of household appliances, concretely relates to diffuser subassembly, driving system, fan.

Background

According to the traditional bladeless fan structure, outside air enters an air duct system under the driving of a power device, a wind wheel is installed on the power device, air flow entering the wind wheel under the driving of negative pressure is changed into high-speed rotating air flow under the action of the wind wheel, and the high-speed rotating air flow flows into an outflow air duct under the guiding action of a flow guide air duct.

However, the high-speed rotating gas circles round in the air duct, vortex is easily generated, the airflow is blocked in the guide air duct, cavity returning noise is generated, and when the high-speed rotating gas is guided in the guide air duct, the airflow easily generates radial movement, so that the pressure intensity of wall surfaces on two sides can fluctuate periodically and greatly, the flowing energy of the gas is weakened, and the noise is also aggravated.

SUMMERY OF THE UTILITY MODEL

Accordingly, the present invention is directed to solving the above problems and providing a diffuser assembly, a power system, and a fan.

In order to solve the above problems, the present invention provides a diffuser assembly including a diffuser and a housing covering the diffuser, wherein a first flow guide surface is formed on a part of a circumferential surface of the diffuser, a first flow guide channel is formed between the first flow guide surface and an inner side wall of the housing, a plurality of flow guide plates are arranged along a circumferential direction of the first flow guide surface and/or the inner side surface of the housing, and the first flow guide channel is divided into a plurality of second flow guide channels by the plurality of flow guide plates; the air inlet end of the guide vane is provided with an air inlet cut angle B, the numerical value of the air inlet cut angle B is [30 degrees ] and 40 degrees ], the air outlet end of the guide vane is provided with an air outlet cut angle A, and the numerical value of the air outlet cut angle A is [80 degrees ] and 100 degrees ].

Further, the air outlet cut angle A is 90 degrees, and the air inlet cut angle B is 37 degrees.

Furthermore, the air inlet flow surface of the flow deflector is tangent to the air outlet flow surface of the wind wheel.

Furthermore, a plurality of the flow deflectors are arranged on the first flow guide surface and/or the inner side surface of the shell at equal intervals.

Further, the spacing of the spaces is [5mm, 40mm ].

Further, the spacing of the spaces is 26 mm.

Further, the number of the guide vanes is [3, 20 ].

Further, the number of the guide vanes is 13.

Further, the flow deflector is molded according to a conformal transformation method: setting a segmentation angle of 3 degrees, wherein the axial-diameter ratio is a dimensionless ratio of the radial distance from each segmentation point to the axis on the flow surface streamline to the maximum inner diameter r, and the chord height ratio is a ratio of the axial distance between each segmentation point on the flow surface streamline to the chord height; wherein the axial diameter ratio of the inner side edge is [0.5, 0.85], the axial diameter ratio of the outer side edge is [0.85, 1], and the axial diameter ratio of the middle side edge is [0.7, 0.95 ]; the chord height ratio of the inner side edge is [0.04, 0.27], and the chord height ratio of the outer side edge is [0.08, 0.12 ].

Further, the first flow guide surface is configured to be an arc-shaped curved surface structure gradually shrinking towards the air outlet end.

Furthermore, along the airflow flowing direction, a second flow guide surface is connected to the first flow guide surface in sequence, and the air outlet end of the second flow guide surface is connected to the outflow air duct.

Furthermore, a plurality of silencing holes are formed in the second flow guide surface.

Furthermore, a plurality of silencing teeth are arranged on the upper end face of the air outlet end of the second flow guide surface.

The present invention also provides a power system including any of the above diffuser assemblies.

The present invention also provides a fan comprising any of the above described diffuser assemblies; or a power system as described above.

Further, the fan is a bladeless fan.

The utility model discloses technical scheme has following advantage:

1. the diffuser component in the utility model comprises a diffuser and a shell covering the diffuser, wherein a first flow guide surface is formed on part of the peripheral surface of the diffuser, a first flow guide channel is formed between the first flow guide surface and the inner side wall of the shell, a plurality of flow guide sheets are arranged along the circumferential direction of the first flow guide surface and/or the inner side surface of the shell, and the first flow guide channel is divided into a plurality of second flow guide channels by the flow guide sheets; the air inlet end of the guide vane is provided with an air inlet cut angle B, the numerical value of the air inlet cut angle B is [30 degrees ] and 40 degrees ], the air outlet end of the guide vane is provided with an air outlet cut angle A, and the numerical value of the air outlet cut angle A is [80 degrees ] and 100 degrees ].

Spiral wind that comes out in power device's the wind wheel enters into the utility model provides a during in the diffuser subassembly, in being shunted the second water conservancy diversion passageway of difference because of the setting of water conservancy diversion piece, the spiral wind of reposition of redundant personnel has reduced its collision probability each other, the turbulent degree of air current in the water conservancy diversion passageway has been weakened, thereby weaken the return chamber noise of air current, and final air-out tangential angle is 80 to 100 after the direction of water conservancy diversion piece, the air current of this kind of wind direction is when transmission in subsequent water conservancy diversion wind channel, radial drunkenness can not take place basically, weaken the pressure change to the wind channel wall in water conservancy diversion wind channel, thereby weaken the noise between air current and wind channel wall.

2. The utility model provides an in the diffuser subassembly air-out corner cut A is 90, and when the air-out corner cut was 90, the mass flow effect that the air current came out from the diffuser was best, can not radially disperse, can guarantee the effective air output of air current in the diffuser.

3. The utility model provides an among the diffuser subassembly the air inlet surface of water conservancy diversion piece is tangent with the air-out surface of wind wheel, and the air inlet surface is tangent with the air-out surface and has guaranteed that the air current that comes out from the wind wheel can channel into the diffuser subassembly smoothly, avoids the air inlet surface to produce the fault with the cooperation department of the air-out surface of wind wheel and hinders the flow of air current, increases the collision noise problem.

4. The utility model provides a plurality of in the diffuser subassembly the guide vane equidistant setting is in first water conservancy diversion face and/or on the medial surface of shell, the homogeneity of reposition of redundant personnel has been guaranteed in the equidistant setting, and the homogeneity of reposition of redundant personnel can guarantee that every guide vane receives fluid pressure's stability and uniformity to effectively guarantee the life of guide vane.

5. The utility model provides a according to the shaping of angle of maintenance transform method in the diffuser subassembly the water conservancy diversion piece: defining a segmentation angle of 3 degrees, wherein the axial-diameter ratio is a dimensionless ratio of the radial distance from each segmentation point to the axis on the flow surface streamline to the maximum inner diameter r, and the chord height ratio is a ratio of the axial distance between each segmentation point on the flow surface streamline to the chord height; wherein the axial diameter ratio of the inner side edge is [0.5, 0.85], the axial diameter ratio of the outer side edge is [0.85, 1], and the axial diameter ratio of the middle side edge is [0.7, 0.95 ]; the chord height ratio of the inner side edge is [0.04, 0.27], the chord height ratio of the outer side edge is [0.08, 0.12], the vane profile of the guide vane is restrained, when fluid flows through the surface of the guide vane, the loss of on-way resistance of the guide vane of the vane profile is small, the linear speed of the spiral wind in the rotating direction can be effectively reduced, more wind energy is gathered in the axial direction, the air outlet speed of the airflow at the tail end of the guide vane is increased, and the air outlet quantity of the diffuser component in unit time is increased.

6. The utility model provides an among the diffuser subassembly first water conservancy diversion face is constructed as the arc curved surface structure towards the gradual shrink of air-out end, and this kind of structure increases the outflow speed of diffuser through the shrink mouth, further increases the flow velocity of the air current in the whole diffuser subassembly.

7. The utility model provides an in the diffuser subassembly be provided with a plurality of bloops on the second water conservancy diversion face, the bloop has weakened the air current and has produced the sound of whistling sound when flowing along the wall at a high speed.

8. The utility model provides an in the diffuser subassembly be provided with a plurality of amortization teeth on the up end of the air-out end of second water conservancy diversion face, the shearing vortex that the tail end produced can be eliminated to the amortization tooth, weakens the noise that the shearing turbine produced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a diffuser assembly according to example 1 provided by the present invention;

fig. 2 is a front view of a diffuser according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of a diffuser in embodiment 1 provided by the present invention;

fig. 4 is a schematic view of angle division in the conformal transformation method according to embodiment 1 of the present invention;

fig. 5 is a schematic view of a blade profile forming process of a guide vane in embodiment 1 provided by the present invention;

fig. 6 is a schematic view of an air inlet corner cut and an air outlet corner cut in embodiment 1.

Description of reference numerals:

1-a diffuser; 11-a first flow guide surface; 12-a second flow guide surface;

2-a housing;

3, flow deflectors;

4-a second flow guide channel;

5-silencing holes;

6-silencing teeth;

7-a first flow guide channel; 71-air outlet;

8-wind wheel;

r-maximum guide vane inner diameter;

s-projection plane;

a-an inner side edge; b-median edge; c-the outer side;

a-air-out corner cut; b-air inlet corner cut.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

Fig. 1 to 6 show that, for the diffuser assembly provided in this embodiment, the diffuser assembly includes a diffuser 1 and a casing 2 covering the diffuser 1, a first flow guide surface 11 is formed on a part of a circumferential surface of the diffuser 1, a first flow guide channel is formed between the first flow guide surface 11 and an inner side wall of the casing 2, a plurality of flow guide plates 3 are arranged along the circumferential direction of the first flow guide surface 11 and/or the inner side surface of the casing 2, and the first flow guide channel is divided into a plurality of second flow guide channels 4 by the plurality of flow guide plates 3; the air inlet end of the guide vane is provided with an air inlet cut angle B, the numerical value of the air inlet cut angle B is [30 degrees ] and 40 degrees ], the air outlet end of the guide vane 3 is provided with an air outlet cut angle A, and the numerical value of the air outlet cut angle A is [80 degrees ] and 100 degrees ].

It should be noted that the guide vanes 3 in this embodiment are directly formed on the first guide surface 11 to facilitate the direct processing on the diffuser 1, thereby facilitating the subsequent assembly.

In other embodiments, the above-mentioned baffle 3 may also be formed on the inner sidewall of the housing 2, and the outer side of the baffle abuts against the first baffle plane 11.

In other embodiments, the flow deflector 3 may be formed on the inner sidewall of the housing 2 and the first flow guiding surface 11 at the same time, and the two flow deflectors are staggered in position.

As shown in fig. 1, when entering into the diffuser assembly in this embodiment, the spiral wind coming out of the wind wheel 8 of the power device is divided into different second diversion channels 4 due to the arrangement of the diversion sheet 3, the collision probability between the spiral wind and the diversion sheet is reduced, the disorder degree of the wind flow in the diversion channels is reduced, so that the back cavity noise of the wind flow is reduced, the final wind-out tangential angle after the guidance of the diversion sheet is 80 ° to 100 °, when the wind flow in the wind direction is transmitted in a subsequent diversion wind channel, radial play is not generated basically, the pressure change to the wind channel wall of the diversion wind channel is reduced, and the noise between the wind flow and the wind channel wall is reduced.

The air inlet chamfer angle B in the embodiment adopts 37 degrees, the air outlet chamfer angle A is 90 degrees, and when the air outlet chamfer angle is 90 degrees, the flow collecting effect of air flow coming out from the diffuser 1 is best, the air flow cannot be radially diffused, and the effective air output of the air flow in the diffuser 1 can be ensured.

Further, the air inlet flow surface of the guide vane 3 in this embodiment is tangent to the air outlet flow surface of the wind wheel, and the air inlet flow surface is tangent to the air outlet flow surface, so that the air flow coming out of the wind wheel can be smoothly guided into the diffuser assembly, and the problem of collision noise caused by the fact that the air flow is blocked due to the fact that the air flow is blocked by the air flow surface at the matching position of the air outlet flow surface of the wind wheel and the air inlet flow surface is avoided.

In this embodiment, the plurality of guide vanes 3 are disposed on the first guide surface 11 at equal intervals. The uniformity of shunting is guaranteed, the stability and consistency of each flow deflector under the fluid pressure can be guaranteed due to the uniformity of shunting, and therefore the service life of each flow deflector is effectively guaranteed.

Of course, in other embodiments, the inner wall of the housing 2 may be alternatively implemented.

The pitch of the above-mentioned intervals is [5mm, 40mm ], and in the present embodiment, the pitch of the intervals is preferably 26 mm.

The number of the guide vanes 3 is [3, 20], and the number of the guide vanes 3 is 13 in this embodiment. Theoretically, the more the number of the flow deflectors is, the smaller the area (blade surface distance and blade surface height) of the blade grid is, the easier the vortex in the flow surface of the blade grid is formed, so that the airflow flowing into the blade grid is blocked, the smaller the number of the flow deflectors is, the larger the area of the blade grid is, the smoother the airflow circulation is, but the air guiding effect is poor, and the flow deflectors are difficult to guide the airflow.

As shown in fig. 4 and 5, the following briefly describes the forming process of the blade profile of the baffle 3, and as shown in fig. 4, the design of the baffle 3 in this embodiment is performed according to a conformal transformation method, wherein the dividing angle is 3 °, the intersection line of the baffle 3 and the first baffle plane 11 is an inner side edge a, the outermost side edge of the baffle 3 is an outer side edge c, and a curve in the middle of the inner side edge and the outer side edge is a middle side edge b, and it should be further noted that, because the baffle 3 has a certain thickness, the two side surfaces of the baffle 3 are generally defined as a pressure surface and a suction surface, and in order to better reflect the blade profile of the baffle 3, a virtual middle surface is taken at equal intervals from the pressure surface and the suction surface in the thickness direction, and the outer side edge c, the inner side edge a, and the middle side edge b are all located on the middle surface. When the angle is changed, the intersection points of the angle dividing line with the outer side c, the inner side a and the middle side b are obtained, and the number of the intersection points on each side in the embodiment is 10. Taking a projection plane s at the central axis, projecting the intersection points onto the projection plane s respectively, for clarity and understanding, as shown in fig. 5, establishing a coordinate system xyz, where the origin of coordinates is an o point (not shown in the figure), the oz axis may be set to coincide with the central axis, and the xoz plane is coplanar with the s plane, defining an axial-to-radial ratio as a dimensionless ratio of a radial distance from each divided point on the flow surface streamline to the axis (a distance from the projected point to the oz axis) to a maximum inner diameter r, and a chord height ratio as a ratio of an axial distance between each divided point on the flow surface streamline (a distance from the projected point to the ox axis) to a chord height (a maximum height in a flow direction of the baffle 3), where 10 intersection points of the blade form in the present embodiment satisfy a relational expression in the following table (where intersection points corresponding to the axial length ratio and the chord height ratio correspond to numeric identifiers in the figure one-to one):

axial length ratio	d	e	f	g	h	i	j	k	l	m
											Inner side edge	0.576	0.696	0.723	0.759	0.784	0.802	0.814	0.823	0.830	0.834
Outer side edge	0.892	0.936	0.940	0.958	0.971	0.981	0.987	0.991	0.997	1
											Median edge	0.734	0.816	0.832	0.859	0.878	0.892	0.900	0.907	0.914	0.917

TABLE 1

Chord height ratio	Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ	Ⅵ	Ⅶ	Ⅷ	Ⅸ	Ⅹ
											Inner side edge	0.270	0.160	0.127	0.108	0.093	0.080	0.069	0.060	0.035	0.049
Outer side edge	0.108	0.185	0.169	0.119	0.100	0.087	0.077	0.068	0.032	0.082
											Median edge	0.189	0.173	0.148	0.114	0.097	0.084	0.073	0.064	0.034	0.067

TABLE 2

When fluid flows through the surface of the guide vane, the pressure loss along the path wall is small, the linear speed of the spiral wind in the rotating direction can be effectively reduced, more wind energy is gathered in the axial direction, the air outlet speed of the airflow at the tail end of the guide vane is increased, and the air outlet quantity of the diffuser component in unit time is increased.

Of course, in other embodiments, the blade profile satisfying the following ranges can also achieve the corresponding technical effects that the ratio of the axial diameters of the inner side is [0.5, 0.85], the ratio of the axial diameters of the outer side is [0.85, 1], and the ratio of the axial diameters of the middle side is [0.7, 0.95 ]; the chord height ratio of the inner side edge is [0.04, 0.27], and the chord height ratio of the outer side edge is [0.08, 0.12 ].

Further, the first guide surface 11 is configured as an arc-shaped curved surface structure gradually shrinking toward the air outlet end. This configuration increases the exit velocity of the diffuser by constricting the orifice, further increasing the flow velocity of the gas stream within the overall diffuser assembly.

Along the air flow direction, the first guide surface 11 is connected with a second guide surface 12, and the air outlet end of the second guide surface 12 is connected to the air outlet duct. And the second flow guiding surface 12 is provided with a plurality of silencing holes 5, the shape of the silencing holes 5 in the embodiment is circular, the silencing holes are distributed in three rows along the axial direction, the interval of the silencing holes 5 distributed along the circumferential direction is 4mm on the same axial height, the interval is the interval of the edge of the two silencing holes 5 which is nearest to each other, and the silencing holes 5 weaken the squealing sound generated when air flow flows along the wall surface at high speed.

Furthermore, a plurality of silencing teeth 6 are arranged on the upper end face of the air outlet end of the second guide surface 12, and can eliminate shearing eddy generated at the tail end and weaken noise generated by the shearing eddy.

Example 2

This embodiment provides a power system including the diffuser assembly of embodiment 1, and has all the technical advantages thereof, which are not described in detail herein.

Example 3

The present embodiment provides a fan, and in particular, a bladeless fan, including the power system described above, and having all technical advantages, which are not described herein again.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (16)

1. A diffuser assembly comprising a diffuser (1) and a housing (2) covering the diffuser (1), wherein a first flow guiding surface (11) is formed on a part of the circumference of the diffuser (1), and a first flow guiding channel is formed between the first flow guiding surface (11) and the inner side wall of the housing (2),

a plurality of flow deflectors (3) are arranged along the circumferential direction of the first flow guide surface (11) and/or the inner side surface of the shell (2), and the first flow guide channel is divided into a plurality of second flow guide channels (4) by the plurality of flow deflectors (3);

the air inlet end of the guide vane (3) is provided with an air inlet cut angle B, the numerical value of the air inlet cut angle B is [30 degrees ] and 40 degrees ], the air outlet end of the guide vane (3) is provided with an air outlet cut angle A, and the numerical value of the air outlet cut angle A is [80 degrees ] and 100 degrees ].

2. The diffuser assembly of claim 1, wherein the air outlet cut angle a is 90 ° and the air inlet cut angle B is 37 °.

3. A diffuser assembly according to claim 1 or 2, wherein the air inlet surface of the guide vane (3) is tangential to the air outlet surface of the wind wheel.

4. A diffuser assembly according to claim 3, wherein a number of said guide vanes (3) are equally spaced on said first guide surface (11) and/or on the inner side of said casing (2).

5. The diffuser assembly of claim 4, wherein the spacing is [5mm, 40mm ].

6. The diffuser assembly of claim 5, wherein the spacing is 26mm apart.

7. The diffuser assembly according to claim 4, wherein the number of guide vanes (3) is [3, 20 ].

8. Diffuser assembly according to claim 7, wherein the number of guide vanes (3) is 13.

9. Diffuser assembly according to claim 4, wherein the guide vanes (3) are shaped according to the conformal transformation method:

setting a segmentation angle of 3 degrees, wherein the axial-diameter ratio is a dimensionless ratio of the radial distance from each segmentation point to the axis on the flow surface streamline to the maximum inner diameter r, and the chord height ratio is a ratio of the axial distance between each segmentation point on the flow surface streamline to the chord height;

wherein the axial-diameter ratio of the inner side edge is [0.5, 0.85], the axial-diameter ratio of the outer side edge is [0.85, 1], and the axial-diameter ratio of the middle side edge is [0.7, 0.95 ];

the chord height ratio of the inner side edge is [0.04, 0.27], and the chord height ratio of the outer side edge is [0.08, 0.12 ].

10. Diffuser assembly according to any of claims 5-9, wherein the first flow guiding surface (11) is configured as an arc-shaped curved structure that gradually converges towards the outlet end.

11. The diffuser assembly according to claim 10, wherein the first guide surface (11) is followed by a second guide surface (12) in the flow direction of the air flow, and the air outlet end of the second guide surface (12) is connected to the outlet air duct.

12. Diffuser assembly according to claim 11, wherein said second deflector surface (12) is provided with dampening holes (5).

13. Diffuser assembly according to claim 11 or 12, wherein the upper end surface of the air outlet end of the second guide surface (12) is provided with a plurality of silencing teeth (6).

14. A power system, comprising:

the diffuser assembly of any one of claims 1-13.

15. A fan, comprising:

the diffuser assembly of any one of claims 1-13;

or a power system as claimed in claim 14.

16. The fan as claimed in claim 15, wherein the fan is a bladeless fan.

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