CN113738700A

CN113738700A - Fan, air condensing units and air conditioning system

Info

Publication number: CN113738700A
Application number: CN202010459464.4A
Authority: CN
Inventors: 詹东文; 胡斯特; 张龙新; 胡小文; 陈鹏
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-12-03
Anticipated expiration: 2040-05-27
Also published as: CN113738700B

Abstract

The invention provides a fan, an air conditioner outdoor unit and an air conditioning system, wherein the fan comprises: a hub; blade, blade set up on wheel hub, the blade includes: a body including a first surface and a second surface disposed opposite the first surface; the connecting end is connected with the hub; the free end is positioned at the other end of the main body opposite to the connecting end; the blade also comprises a blade front edge and a blade tail edge which are respectively positioned at two sides of the blade along the rotation direction of the hub; the tooth parts are arranged on the front edge of the blade and distributed along the direction from the connecting end to the free end; wherein the teeth are convex towards one side of the first surface and/or convex towards one side of the second surface. The fan provided by the invention has the advantages that the teeth with two fluctuation directions are arranged on the front edge of the blade, so that the fan can better adapt to uneven incoming flow, and the fan turbulence broadband noise can be reduced.

Description

Fan, air condensing units and air conditioning system

Technical Field

The invention relates to the technical field of household appliances, in particular to a fan, an air conditioner outdoor unit and an air conditioning system.

Background

With the rapid development of the household appliance industry, the problem of fan noise has become one of the problems generally concerned by the household appliance industry at present, and in order to reduce the fan turbulence broadband noise, the front edge tooth part structure with the convex front edge is widely concerned due to the convenient implementation. Because the modeling structure of the front edge tooth part is complex, no good front edge sawtooth design exists.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the invention proposes a fan.

A second aspect of the present invention provides an outdoor unit of an air conditioner.

A third aspect of the present invention provides an air conditioning system.

In view of the above, a first aspect of the present invention provides a fan, including: a hub; blade, blade set up on wheel hub, the blade includes: a body including a first surface and a second surface disposed opposite the first surface; the connecting end is connected with the hub; the free end is positioned at the other end of the main body opposite to the connecting end; the blade also comprises a blade front edge and a blade tail edge which are respectively positioned at two sides of the blade along the rotation direction of the hub; the tooth parts are arranged on the front edge of the blade and distributed along the direction from the connecting end to the free end; wherein the teeth are convex towards one side of the first surface and/or convex towards one side of the second surface.

The invention provides a fan, which comprises a hub and a plurality of blades arranged on the peripheral side of the hub, wherein each blade comprises a main body, one end of each main body, which is connected with the hub, is a connecting end, one end of each blade top is a free end, the first surface of each main body is a windward surface of each blade, the second surface of each main body is a leeward surface arranged opposite to the first surface, the front edge of each blade is positioned between the connecting end and the free end and connected to the first surface and the second surface, the front edge of each blade comprises a front edge and a tail edge, which are respectively positioned on two sides of each blade, and the front edge of each blade is provided with tooth parts distributed along the direction from the connecting end to the free end, wherein the tooth parts are convex towards one side of the first surface and/or convex towards one side of the second surface. Tooth portion setting through possessing two kinds of undulant directions is on the blade leading edge, can adapt to inhomogeneous incoming flow better, and the fan boundary layer is difficult to take place the separation, and the fan torrent wide band noise can be reduced to the phase interference principle of marginal tooth portion, and the undulant setting of this kind of complex tooth portion has also guaranteed that the blade camber line does not change simultaneously, and then has guaranteed aerodynamic performance, promotes fan efficiency.

Specifically, the blade provided by the invention comprises a blade front edge and a blade tail edge, wherein the front edge is located at the upstream of the tail edge along the incoming flow direction of the airflow, the front edge of the blade is provided with teeth, the teeth are distributed on the front edge along the direction from the connecting end to the free end of the blade, and the teeth are convex towards the windward side and/or the leeward side of the blade, namely undulate towards the direction perpendicular to the extending direction of the blade. The distance between the tooth parts of the blade provided by the invention is fluctuated in two directions, wherein the two directions comprise the extending direction of the blade from the connecting end to the free end and the extending direction vertical to the connecting end to the free end, so that the blade can better adapt to uneven incoming flow, the boundary layer of the blade is not easy to separate, and the phase interference principle of the sawtooth at the front edge can also reduce the turbulent broadband noise of the fan.

In addition, according to the fan in the above technical scheme provided by the invention, the fan can also have the following additional technical features:

in the above technical solution, further, the distance from the connecting end to the free end is L; the distance from the starting point of the tooth portion to the end point of the tooth portion is S, and the value range of S is 0.3 xL to 0.9 xL.

In this technical scheme, it is 0.3 to 0.9 to further stipulate the proportion that tooth start-stop interval accounts for the interval between blade link to the free end, can adapt to inhomogeneous incoming flow better, the boundary layer of blade is difficult to take place to separate, the phase place interference principle of marginal tooth portion also can reduce fan torrent wide band noise, the undulant setting of this kind of complex tooth portion has also guaranteed that the pitch arc does not change in the blade simultaneously, and then guaranteed aerodynamic performance, it does not contain the tooth portion to remain partial edge simultaneously, smooth transition's design has reduced the blade processing degree of difficulty.

In any of the above technical solutions, further, the tooth portion includes n teeth, and a distance between tooth tops of two adjacent teeth in a direction from the connecting end to the free end is equal to a ratio of S to n.

In this technical scheme, further stipulated the relation of interval and the number of teeth between the adjacent addendum of tooth, the tooth number of tooth is more, and the addendum interval is less, can obtain the design value of another item in tooth number or the addendum interval according to the design demand of tooth number or one item in the addendum interval to satisfy and do not influence pneumatic performance again when reducing fan noise. Further, the value of n is 1 to 9.

In any of the above solutions, further, the tooth is located at a portion of the leading edge of the blade near the free end.

In this technical scheme, through set up the tooth in the part that is close to the free end of blade leading edge for the tooth plays a role in the great flow department of fan, can reduce fan torrent wide band noise through phase interference better, and set up the tooth in the one side of keeping away from connecting portion and be favorable to reducing the whole fashioned degree of difficulty of fan.

In any of the above technical solutions, further, a protruding height a of the tooth portion protruding toward one side of the first surface and/or protruding toward the second surface ranges from 0.008 × L to 0.08 × L.

In this technical scheme, the protruding height of further having stipulated the tooth is 0.008 to 0.08 of link and free end interval, can adapt to inhomogeneous incoming flow better, and the fan boundary layer is difficult to take place to separate, and the phase interference principle of marginal tooth also can reduce fan torrent wide band noise, and the undulant setting of complex tooth has also guaranteed that the pitch arc does not change in the blade simultaneously, and then has guaranteed aerodynamic performance.

In any of the above technical solutions, further, the blade is a three-dimensional blade.

In the technical scheme, the designated blade is a three-dimensional blade, so that the blade can better adapt to uneven incoming flow, the boundary layer of the fan is not easy to separate, the phase interference principle of the edge tooth part can also reduce the broadband noise of fan turbulence, and meanwhile, the compound tooth part fluctuation arrangement also ensures that the camber line of the three-dimensional blade does not change, so that the pneumatic performance of the three-dimensional blade is ensured, the applicable scene of the blade structure is wider, and the universality is enhanced. Further, the three-dimensional blade is characterized in that the cross section of the blade is performed along the axial direction of the hub by taking the rotating shaft center of the hub as the center of a circle and taking concentric circles with different radiuses R, and the cross section shapes of the blade obtained from the connecting end to the free end of the blade are not completely the same.

In any one of the above technical solutions, further, the fan includes: a first stage fan blade; a second stage fan blade; the driving assembly is connected with the first-stage fan blades and the second-stage fan blades; wherein, the first order flabellum is the upper reaches flabellum, and the second level flabellum is the low reaches flabellum, and first order flabellum and/or second level flabellum include wheel hub and as above-mentioned any technical scheme's blade.

According to the fan provided by the invention, the driving assembly is connected with the first-stage fan blade and the second-stage fan blade to form a two-stage fan, so that higher wind pressure can be provided, wherein the first-stage fan blade is an upstream fan blade, the second-stage fan blade is a downstream fan blade, and at least one of the first-stage fan blade and/or the second-stage fan blade can be provided with the blade of any technical scheme. Specifically, the second-stage fan blade comprises the blade of any one of the technical schemes, and the front edge of the blade is provided with the composite tooth part, so that the interference effect on the tail edge of the blade of the first-stage fan blade in the rotating process can be effectively eliminated, and the two-stage interference noise is reduced.

Specifically, the front edge of the second-stage fan blade, namely the downstream fan blade, is provided with the tooth features mentioned in the technical scheme, and the interference effect of the trailing edge of the first-stage fan blade can be effectively eliminated by applying the technology to the second-stage fan blade of the contra-rotating fan blade.

Further, the first stage fan blade includes the blade and the hub in any one of the above technical solutions, and the blade is disposed on the peripheral side of the hub. When the counter-rotating fan is applied to the whole machine, the first-stage fan blade can be loaded with front edge sawteeth, so that the first-stage fan blade can adapt to uneven incoming flow caused by the over-current component in the whole machine, the camber line in the fan blade is ensured to be unchanged while noise is reduced, and the aerodynamic performance of the fan is ensured.

In the above technical solution, further, the rotation directions of the first-stage fan blades and the second-stage fan blades are opposite.

In this technical scheme, the rotation direction of first order flabellum and second level flabellum is opposite, and then has realized the disrotatory of second grade fan, can provide higher wind pressure, and wherein, along the air current flow direction, the first order flabellum is the upper reaches flabellum, and the second level flabellum is the low reaches flabellum.

In any of the above technical solutions, further, the driving assembly includes: a first motor; the first output shaft is connected with the first motor, and the output end of the first output shaft is connected with the first-stage fan blades; a second motor; the output end of the second output shaft is connected with the second-stage fan blades; wherein, the rotation directions of the first output shaft and the second output shaft are opposite.

In this technical scheme, drive assembly includes first motor, first output shaft, the second motor, the second output shaft, concretely, the one end of first output shaft links to each other with first motor, the output links to each other with first order flabellum, make the power transmission of first motor make its rotation for first order flabellum, the one end of second output shaft links to each other with the second motor, the output links to each other with second order flabellum, and make it rotate towards the direction opposite with first order flabellum direction of rotation, make the second order flabellum form the disrotatory, provide higher wind pressure, and the mode modularization that controls a flabellum respectively through two motors is strong, realize more easily.

In any of the above technical solutions, further, the driving assembly includes: a motor; the first output shaft is connected with the motor, the output end of the first output shaft is connected with the first-stage fan blades, and the first output shaft is provided with an axial through hole; the second output shaft penetrates through the through hole, one end of the second output shaft is connected with the motor, and the other end of the second output shaft is connected with the second-stage fan blades; wherein, the rotation directions of the first output shaft and the second output shaft are opposite.

In this technical scheme, drive assembly includes the motor, first output shaft, the second output shaft, concretely, the one end of first output shaft links to each other with the motor, the output links to each other with first order flabellum, make the power transmission of motor give first order flabellum, the second output shaft wears to locate in the axial through hole of first output shaft through nested connection's mode, the one end of second output shaft links to each other with the motor, the output links to each other with second level flabellum, make the power transmission of motor give second level flabellum, and make it rotate towards the direction opposite with first order flabellum direction of rotation, make second level flabellum form the disrotatory, provide higher wind pressure.

According to the second aspect of the present invention, there is also provided an outdoor unit of an air conditioner, comprising: the shell is provided with an air outlet; the air guide ring is arranged at the air outlet; and the fan is arranged on the shell and positioned in the air guide ring.

The air conditioner outdoor unit provided by the invention comprises the fan in any technical scheme, so that the air conditioner outdoor unit has all the beneficial effects of the fan, and is not repeated herein.

Specifically, the air outlet is formed in the shell, the air guide ring is arranged at the air outlet, the fan is arranged on the shell and in the air guide ring, and therefore the fan of the outdoor unit of the air conditioner is assembled.

In the above technical solution, further, the driving assembly of the fan includes a first motor, a first output shaft, a second motor, and a second output shaft, specifically, one end of the first output shaft is connected to the first motor, and the output end is connected to the first stage fan blade; one end of the second output shaft is connected with the second motor, and the output end of the second output shaft is connected with the second-stage fan blades; the air conditioner outdoor unit further comprises a first motor support, and a first motor of the fan is arranged on the first motor support; and the second motor of the fan is arranged on the second motor support.

In the technical scheme, the first motor of the fan is arranged on the first motor support, and the second motor of the fan is arranged on the second motor support, so that the two motors of the fan are fixedly arranged on the air conditioner outdoor unit, relative movement cannot occur, and the fan and the air conditioner outdoor unit are assembled. When the outdoor unit of the air conditioner starts to work, the first-stage fan blades also comprise the tooth parts, the influence of non-uniform incoming flow caused by non-fan components such as the first motor support and the second motor support in the outdoor unit can be reduced, the running noise of the outdoor unit is reduced, the interference effect with the first-stage fan blades is further reduced by the second-stage fan blades in the fan through the tooth parts, the running noise of the outdoor unit is further reduced, meanwhile, the arc lines in the blades can be guaranteed not to change by the first-stage fan blades and the second-stage fan blades, and further the pneumatic performance of the outdoor unit of the air conditioner is guaranteed.

In the above technical solution, further, the driving assembly includes a motor, a first output shaft, and a second output shaft, specifically, one end of the first output shaft is connected to the motor, and an output end is connected to the first stage fan blades, so that power of the motor is transmitted to the first stage fan blades, the second output shaft is inserted into the axial through hole of the first output shaft in a nested connection manner, one end of the second output shaft is connected to the motor, and the output end is connected to the second stage fan blades; the air conditioner outdoor unit further comprises a motor support, the motor support is arranged on the shell, and a motor of the fan is arranged on the motor support to support the motor.

According to a third aspect of the present invention, there is also provided an air conditioning system comprising: the fan of any one of the above technical schemes; or the air conditioner outdoor unit according to any one of the above technical solutions.

The air conditioning system provided by the invention comprises the fan in any technical scheme or the air conditioning outdoor unit in any technical scheme, so that the air conditioning system has all the beneficial effects of the fan or the air conditioning outdoor unit, and is not repeated herein.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates a schematic structural diagram of a wind turbine according to an embodiment of the present invention;

FIG. 2 is a schematic view of the blade of the embodiment of FIG. 1 at one angle;

FIG. 3 is a schematic view of another angle of the blade of the embodiment of FIG. 1;

FIG. 4 shows a tooth parameter diagram of the blade of the embodiment of FIG. 1;

FIG. 5 illustrates a partial schematic view of a counter-rotating fan according to an embodiment of the present invention;

FIG. 6 is a front view showing a partial structure of the blower fan in the embodiment shown in FIG. 5;

fig. 7 is a schematic view illustrating a structure of an outdoor unit of an air conditioner according to an embodiment of the present invention;

FIG. 8 illustrates noise contrast data for a fan having a second stage fan blade with leading edge teeth versus a prior art fan;

FIG. 9 illustrates noise contrast data for a fan having leading edge teeth on a first stage blade versus a prior art fan;

FIG. 10 shows noise contrast data for a fan having leading edge teeth for both the first and second stage blades versus a prior art fan.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 7 is:

100 blades, 102 a main body, 1022 a first surface, 1024 a second surface, 104 a connecting end, 106 a free end, 1082 a front edge, 1084 a tail edge, 110 teeth, 120 a hub, 200 a fan, 202 a first stage fan blade, 204 a second stage fan blade, 2062 a first motor, 2064 a first output shaft, 2066 a second motor, 2068 a second output shaft, 300 an outdoor unit of an air conditioner, 302 a shell, 304 an air outlet, 306 an air guide ring, 308 a first motor support, 310 a second motor support and 312 an electric control box.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The fan 200 and the outdoor unit 300 of the air conditioner according to some embodiments of the present invention will be described with reference to fig. 1 to 10.

Example one

As shown in fig. 1 to 3, a first aspect of the present invention provides a wind turbine 200 including: a hub 120 and a plurality of blades 100 provided on the circumferential side of the hub 120.

Wherein, blade 100 includes: a main body 102; a connecting end 104 and a free end 106 disposed at both ends of the body 102; a blade leading edge 1082 and a blade trailing edge 1084 located on either side of the blade 100 in the direction of rotation of the hub 120; and teeth 110 disposed on the leading edge 1082.

Further, as shown in fig. 2 and 3, the body 102 includes a first surface 1022 and a second surface 1024 disposed opposite the first surface 1022; the connection end 104 is connected to the hub 120. Further, the teeth 110 are distributed along the direction from the connecting end 104 to the free end 106; and the teeth project toward a side of the first surface 1022 and/or toward a side of the second surface 1024.

The wind turbine 200 provided in the present embodiment includes a hub 120 and a blade 100, wherein a first surface 1022 of a main body 102 of the blade 100 is a windward side of the blade 100, a second surface 1024 of the main body 102 is a leeward side opposite to the first surface 1022, a connecting end 104 and a free end 106 are respectively disposed at two ends of the main body 102, a leading edge 1082 and a trailing edge 1084 of the blade are disposed between the connecting end 104 and the free end 106 and connected to the first surface 1022 and the second surface 1024, and teeth 110 distributed along a direction from the connecting end 104 to the free end 106 are disposed on the leading edge 1082, wherein the teeth 110 are protruded toward a side of the first surface 1022 and/or a side of the second surface 1024. Through the tooth 110 setting that will possess two kinds of undulant directions on blade leading edge 1082, can adapt to inhomogeneous incoming flow better, the blade boundary layer is difficult to take place to separate, and the phase interference of marginal tooth portion can reduce fan torrent wide band noise, and the undulant setting of this kind of complex tooth portion has also guaranteed that the pitch arc does not change in the blade simultaneously, and then has guaranteed aerodynamic performance, has promoted fan efficiency.

The protrusion of the tooth 110 toward one side of the first surface 1022 means that the tooth 110 protrudes from the first surface 1022 as shown in fig. 2; the teeth 110 are convex toward the side of the second surface 1024, meaning that the teeth 110 are convex from the second surface 1024 as shown in fig. 2.

Specifically, as shown in fig. 1, when two blades 100 in the wind turbine 100 are viewed from different angles, the distance fluctuation of the teeth of the leading edge 1082 of the blade in the extending direction of the blade can be seen, and the distance fluctuation of the teeth of the leading edge 1082 of the blade in the direction from one surface of the blade to the other surface of the blade can also be seen.

Specifically, FIGS. 2 and 3 provide block diagrams of a single blade 100 in a wind turbine 200, more clearly illustrating the pattern of distance undulations of the teeth of the leading edge 1082 in two directions, including the direction of blade extension and the direction of one surface of the blade to the other.

Specifically, the blade 100 provided by the present invention includes a blade leading edge 1082 and a trailing edge 1084, the leading edge 1082 is located upstream of the trailing edge 1084 along the incoming flow direction of the airflow, and the leading edge 1082 of the blade 100 is provided with a tooth 110, wherein the tooth 110 is distributed on the leading edge 1082 along the direction from the connecting end 104 to the free end 106 of the blade, and the tooth is convex toward the windward side and/or leeward side of the blade, that is, the tooth fluctuates toward the direction perpendicular to the extending direction of the blade. The distance between the tooth parts of the blade provided by the invention is fluctuated in two directions, wherein the two directions comprise the extending direction of the blade from the connecting end to the free end and the extending direction vertical to the connecting end to the free end, so that the blade can better adapt to uneven incoming flow, the boundary layer of the fan is not easy to separate, and the phase interference principle of the sawtooth of the front edge 1082 can also reduce the turbulent broadband noise of the fan.

Example two

As shown in fig. 1 to 4, on the basis of the above embodiment, further, as shown in fig. 4, the distance from the connecting end 104 to the free end 106 is L; the distance from the start point of the tooth 110 to the end point of the tooth is S, which ranges from 0.3 × L to 0.9 × L.

Specifically, on the premise that the fan noise is reduced and the aerodynamic performance is not affected, the proportion of the starting-to-dead-point distance S of the tooth part 110 to the distance L between the connecting end 104 and the free end 106 of the blade is further regulated to be 0.3-0.9, meanwhile, the partial area of the front edge is kept to be free of the tooth part 110, and the blade machining difficulty is reduced due to the smooth transition design.

Further, as shown in fig. 4, the tooth portions 110 include n teeth, and a distance W between tooth tops of two adjacent tooth portions 110 in a direction from the connecting end 104 to the free end 106 is equal to a ratio of S to n. The relationship between the tooth top spacing W and the tooth number n of each tooth part 110 is specified, the more the tooth number n of the tooth part 110 is, the smaller the tooth top spacing W is, and the design value of the other one of the tooth number n or the tooth space W can be obtained according to the design requirement of one of the tooth number n or the tooth top spacing W, so that the aerodynamic performance is not influenced while the fan noise is reduced.

Specifically, as shown in fig. 4, a projection diagram of a contour line of a three-dimensional blade projected along the axial direction of the impeller hub 120 is shown, and the size requirement of the tooth portion of the blade leading edge 1082 is described. In FIG. 4, L represents the distance from the tip (i.e., free end 106) to the root (i.e., attached end 104), i.e., the span length of the blade; s represents the length of the portion of the blade leading edge 1082 with teeth, and is 0.3 × L to 0.9 × L; w represents the distance between the tooth tops of two adjacent teeth, and when there are n teeth, W is equal to S/n, and the number of teeth n is generally 1 to 9; a denotes a protrusion height of the serrations in a direction from one surface to the other surface of the blade, and is generally 0.008 × L to 0.08 × L.

Further, as shown in fig. 2-4, the teeth 110 are located on a portion of the vane leading edge 1082 proximate the free end 106.

Specifically, because the blade diameter is linear with the flow, the tooth 110 is disposed at the portion close to the free end 106 of the blade leading edge 1082, so that the tooth 110 functions at a larger flow of the fan, the fan turbulence broadband noise can be better reduced by phase interference, and the tooth 110 is disposed at the side far away from the connecting portion 104, which is beneficial to reducing the difficulty of the integral forming of the fan.

Further, as shown in fig. 3, the protrusion height a of the tooth 110 protruding toward the first surface 1022 and/or the second surface 1024 ranges from 0.008 × L to 0.08 × L. The protruding height of tooth portion has specifically stipulated and has been adapted to inhomogeneous incoming flow for 0.008 to 0.08 of link and free end interval better, and the fan boundary layer is difficult to take place the separation, and the phase interference principle of marginal tooth portion also can reduce fan torrent wide band noise, and the undulant setting of complex tooth portion has also guaranteed that the blade pitch arc does not change simultaneously, and then has guaranteed aerodynamic performance.

Further, as shown in FIG. 1, the blade 100 is a three-dimensional blade.

In this embodiment, the blade 100 is a three-dimensional blade, so that the blade can better adapt to uneven incoming flow, the fan boundary layer is not easy to separate, the phase interference of the edge tooth 110 can reduce fan turbulence broadband noise, and the compound tooth 110 fluctuation arrangement also ensures that the camber line of the three-dimensional blade does not change, thereby ensuring the aerodynamic performance of the three-dimensional blade, widening the applicable scenes of the blade structure, and enhancing the universality. Specifically, the three-dimensional blade is a blade that is sectioned along the axial direction of the hub 120 with the rotation axis of the hub 120 as the center and concentric circles of different radii R, and the obtained blade sectional shape is not completely the same from the connecting end to the free end of the blade, or the chord length corresponding to the obtained blade sectional shape changes from the connecting end to the free end of the blade, or the blade installation angle corresponding to the obtained blade sectional shape changes from the connecting end to the free end of the blade.

Further, the method is carried out. The shape of the teeth of the tooth portion 110 may be a triangular tooth structure, a trapezoidal tooth structure, an arc tooth structure, or the like.

The fan 200 provided by this embodiment improves the turbulent broadband noise of the fan by phase interference by loading the leading edge 1082 teeth on the three-dimensional blade. Furthermore, the tooth parts are arranged on the front edge 1082 of the blade, the integral structure of the three-dimensional blade is not changed, and therefore the camber line of the fan blade is not changed and the aerodynamic performance of the fan blade is not affected.

EXAMPLE III

According to an embodiment of the present invention, as shown in fig. 5 and 6, there is also provided a wind turbine 200, including: first order flabellum 202, second grade flabellum 204 and drive assembly, drive assembly is connected with first order flabellum 202 and second grade flabellum 204, and first order flabellum 202 is as the upper reaches flabellum, and second grade flabellum 204 is as the low reaches flabellum, and drive assembly drives first order flabellum 202 and second grade flabellum 204 and rotates, and then has formed the second grade fan, can realize providing higher wind pressure.

The second-stage fan blade 204 comprises a hub 120 and the blade 100 provided by any one of the above embodiments, that is, the tooth 110 is arranged on the front edge 1082 of the blade 100 of the second-stage fan blade 204, and the tooth 110 with the composite fluctuation direction is arranged, so that the camber line of the blade is not changed, the aerodynamic performance of the three-dimensional blade is realized, the interference effect of the trailing edge 1084 of the first-stage fan blade 202 in the counter-rotation process can be effectively eliminated, and the effect of two-stage interference noise is reduced.

Specifically, the second-stage fan blade 204, i.e., the leading edge 1082 of the downstream fan blade, is provided with the tooth 110 mentioned in the above technical solution, and by applying this technique to the second-stage fan blade 204 of the counter-rotating fan blade, the interference effect of the trailing edge 1084 of the first-stage fan blade 202 can be effectively eliminated. Further, as shown in fig. 8, as seen from a comparison of noise reduction experimental data of the fan in which the tooth portion 110 is disposed on the leading edge 1082 of the second-stage fan blade 204, i.e., the downstream fan blade, and the fan in the prior art, when the air volume is 1650 to 2800 cubic meters per hour, the tooth portion 110 disposed on the leading edge 1082 of the second-stage fan blade 204 can achieve a noise reduction effect, and at least achieve a 0.3 db noise reduction effect.

Further, the driving assembly is connected with the first stage fan blades 202 and the second stage fan blades 204, and the rotation directions of the first stage fan blades 202 and the second stage fan blades 204 are opposite, so that the counter rotation of the second stage fan is realized, and higher wind pressure can be provided.

Further, as shown in fig. 7, the driving assembly includes: a first electric machine 2062; a first output shaft 2064, the first output shaft 2064 is connected with the first motor 2062, and the output end of the first output shaft 2064 is connected with the first-stage fan blades 202; a second electric machine 2066; a second output shaft 2068, the second output shaft 2068 is connected with a second motor 2066, and the output end of the second output shaft 2068 is connected with the second-stage fan blades 204; wherein the first output shaft 2064 and the second output shaft 2068 rotate in opposite directions. Specifically, first output shaft 2064 one end links to each other with first motor 2062, and the output links to each other with first order flabellum 202, makes first motor 2062's power transfer make its rotation for first order flabellum 202, and second output shaft 2068 one end links to each other with second motor 2066, and the output links to each other with second order flabellum 204 to make it rotate towards the direction opposite with first order flabellum 202 direction of rotation, make the second order flabellum form the disrotatory, provide higher wind pressure, and the mode modularization that controls individual flabellum respectively through two motors is strong, and easier realization.

Alternatively, the drive assembly comprises: a motor; the first output shaft is connected with the motor, the output end of the first output shaft is connected with the first-stage fan blades, and the first output shaft is provided with an axial through hole; the second output shaft penetrates through the through hole, one end of the second output shaft is connected with the motor, and the other end of the second output shaft is connected with the second-stage fan blades; wherein, the rotation directions of the first output shaft and the second output shaft are opposite. In this embodiment (this embodiment is not shown in the figure), the driving assembly includes a motor, a first output shaft, and a second output shaft, and the second output shaft is inserted into the axial through hole of the first output shaft in a nested connection manner, so that the single motor drives the rotation of the secondary fan blades, and the rotation directions of the secondary fan blades are opposite to each other, thereby forming a counter-rotation and providing a higher wind pressure.

Example four

According to an embodiment of the present invention, the blower fan 200 of the outdoor unit 300 includes: first order flabellum 202, second grade flabellum 204 and drive assembly, drive assembly is connected with first order flabellum 202 and second grade flabellum 204, and first order flabellum 202 is as the upper reaches flabellum, and second grade flabellum 204 is as the low reaches flabellum, and drive assembly drives first order flabellum 202 and second grade flabellum 204 and rotates, and then has formed the second grade fan, can realize providing higher wind pressure.

The first stage fan blade 202 includes the hub 120 and the blade 100 provided in any of the above embodiments, that is, the tooth 110 is provided on the leading edge 1082 of the blade 100 of the first stage fan blade 202.

Specifically, when the integrated cyclone 200 is used, the first-stage blades 202 can also be loaded with the tooth portions of the leading edges 1082, so that the first-stage blades 202 can adapt to uneven incoming flow caused by flow passing components in the integrated cyclone, noise is reduced, camber lines in the blades are guaranteed to be unchanged, and the aerodynamic performance of the fan is guaranteed. Specifically, as shown in fig. 9, as can be seen from a comparison graph of noise reduction experimental data of the fan with the tooth portion 110 at the front edge of the first-stage fan blade 202 and the fan in the prior art, under the condition that the air volume is 1650 to 2800 cubic meters per hour, the fan with the tooth portion 110 at the front edge of the first-stage fan blade 202 can achieve the effect of noise reduction, and at least achieve the effect of noise reduction by 0.5 db.

EXAMPLE five

According to an embodiment of the present invention, the blower fan 200 of the outdoor unit 300 of the air conditioner shown in fig. 7 includes: first order flabellum 202, second grade flabellum 204 and drive assembly, drive assembly is connected with first order flabellum 202 and second grade flabellum 204, and first order flabellum 202 is as the upper reaches flabellum, and second grade flabellum 204 is as the low reaches flabellum, and drive assembly drives first order flabellum 202 and second grade flabellum 204 and rotates, and then has formed the second grade fan, can realize providing higher wind pressure.

Wherein, the first stage fan blade 202 includes the hub 120 and the blade 100 provided in any of the above embodiments, that is, the tooth 110 is provided on the leading edge 1082 of the blade 100 of the first stage fan blade 202; the second stage fan blade 204 also includes the hub 120 and the blade 100 as provided in any of the above embodiments, i.e., the teeth 110 are provided on the leading edge 1082 of the blade 100 of the second stage fan blade 204. That is, the leading edge 1082 of the first stage fan blade 202 and the second stage fan blade 204 of the wind turbine 200 in this embodiment each have teeth 110.

Specifically, when the integrated cyclone 200 is used, the first-stage blades 202 can also be loaded with the tooth portions of the leading edges 1082, so that the first-stage blades 202 can adapt to uneven incoming flow caused by flow passing components in the integrated cyclone, noise is reduced, camber lines in the blades are guaranteed to be unchanged, and the aerodynamic performance of the fan is guaranteed. And then the second-stage fan blade 204 provided with the tooth part 110 with the composite fluctuation direction can effectively eliminate the interference effect on the blade trailing edge 1084 of the first-stage fan blade 202 in the rotation process and reduce the effect of two-stage interference noise. Specifically, as shown in fig. 10, as can be seen from a comparison graph of noise reduction experimental data of the fan in which the tooth portions 110 are disposed on the front edges of the first-stage fan blades 202 and the second-stage fan blades 204, under the condition that the air volume is 1650 to 2800 cubic meters per hour, the fan in which the tooth portions 110 are disposed on the front edges of the first-stage fan blades 202 and the second-stage fan blades 204 can achieve the effect of noise reduction, and at least achieve the effect of noise reduction by 0.9 db.

EXAMPLE six

An embodiment of the present invention provides an outdoor unit 300 of an air conditioner, including: a housing 302, the housing 302 being provided with an air outlet 304; the air guide ring 306 is arranged at the air outlet; and the fan 200 is arranged on the shell 302 and positioned in the air guide ring 306.

Wherein, as shown in fig. 7, the fan 200 includes: first order flabellum 202, second grade flabellum 204 and drive assembly, drive assembly is connected with first order flabellum 202 and second grade flabellum 204, and first order flabellum 202 is as the upper reaches flabellum, and second grade flabellum 204 is as the low reaches flabellum, and drive assembly drives first order flabellum 202 and second grade flabellum 204 and rotates, and then has formed the second grade fan, can realize providing higher wind pressure.

Specifically, when the counter-rotating fan 200 is applied to the whole machine, the first-stage fan blades 202 can also be loaded with the front edge 1082 sawteeth, so that the first-stage fan blades 202 can adapt to uneven incoming flow caused by the flow passing components in the whole machine, noise is reduced, meanwhile, the camber lines in the fan blades are guaranteed to be unchanged, and the aerodynamic performance of the fan is guaranteed. And then the second-stage fan blade 204 provided with the tooth part 110 with the composite fluctuation direction can effectively eliminate the interference effect on the blade trailing edge 1084 of the first-stage fan blade 202 in the rotation process and reduce the effect of two-stage interference noise.

Further, the drive assembly includes: a first electric machine 2062; a first output shaft 2064, the first output shaft 2064 is connected with the first motor 2062, and the output end of the first output shaft 2064 is connected with the first-stage fan blades 202; a second electric machine 2066; a second output shaft 2068, the second output shaft 2068 is connected with a second motor 2066, and the output end of the second output shaft 2068 is connected with the second-stage fan blades 204; wherein the first output shaft 2064 and the second output shaft 2068 rotate in opposite directions. Specifically, first output shaft 2064 one end links to each other with first motor 2062, and the output links to each other with first order flabellum 202, makes first motor 2062's power transfer make its rotation for first order flabellum 202, and second output shaft 2068 one end links to each other with second motor 2066, and the output links to each other with second order flabellum 204 to make it rotate towards the direction opposite with first order flabellum 202 direction of rotation, make the second order flabellum form the disrotatory, provide higher wind pressure, and the mode modularization that controls individual flabellum respectively through two motors is strong, and easier realization.

The outdoor unit 300 of the air conditioner provided in this embodiment includes the fan 200 according to any of the above technical solutions, and therefore, has all the beneficial effects of the fan 200, and is not described herein again.

Specifically, the casing 302 is provided with the air outlet 304, the air outlet 304 is provided with the air guide ring 306, and the fan 200 is arranged on the casing 302 and in the air guide ring 306, so that the fan 200 of the outdoor unit 300 of the air conditioner is assembled.

Further, the outdoor unit 300 further includes a first motor bracket 308, and the first motor 2062 of the blower 200 is disposed on the first motor bracket 308; the second motor bracket 310 and the second motor 2066 of the blower 200 are disposed on the second motor bracket 310.

In this embodiment, the first motor 2062 of the fan 200 is disposed on the first motor support 308, and the second motor 2066 of the fan 200 is disposed on the second motor support 310, so that the two motors of the fan are fixedly mounted on the outdoor unit 300 without relative movement, and the fan 200 and the outdoor unit 300 are assembled. When the outdoor unit of the air conditioner starts to work, because the first-stage fan blades 202 also comprise the tooth parts, the influence of non-uniform incoming flow caused by non-fan components such as the electric control box 312, the first motor support 308, the second motor support 310 and the like in the outdoor unit 300 can be reduced, the running noise of the outdoor unit 300 is reduced, the interference effect with the first-stage fan blades 202 is further reduced by the second-stage fan blades 204 in the fan 200 through the tooth parts, the running noise of the outdoor unit 300 is further reduced, and meanwhile, the arc lines in the blades can be guaranteed not to change by the first-stage fan blades 202 and the second-stage fan blades 204, so that the pneumatic performance of the outdoor unit of the air conditioner is guaranteed.

EXAMPLE seven

Wherein, fan 200 includes: first order flabellum 202, second grade flabellum 204 and drive assembly, drive assembly is connected with first order flabellum 202 and second grade flabellum 204, and first order flabellum 202 is as the upper reaches flabellum, and second grade flabellum 204 is as the low reaches flabellum, and drive assembly drives first order flabellum 202 and second grade flabellum 204 and rotates, and then has formed the second grade fan, can realize providing higher wind pressure.

Specifically, the leading edge 1082 of the second-stage fan blade 204, i.e., the downstream fan blade, is provided with the tooth feature mentioned in the above technical solution, and by applying this technique to the second-stage fan blade 204 of the counter-rotating fan blade, the interference effect of the trailing edge 1084 of the first-stage fan blade 202 can be effectively eliminated.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above 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.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan, comprising:

a hub;

a blade disposed on the hub, the blade comprising:

a body comprising a first surface and a second surface disposed opposite the first surface;

the connecting end is connected with the hub;

a free end located at another end of the body opposite the connection end;

along the rotation direction of the hub, the blade further comprises a blade front edge and a blade tail edge which are respectively positioned at two sides of the blade;

the tooth parts are arranged on the front edge of the blade and distributed along the direction from the connecting end to the free end;

wherein the tooth portion is protruded toward one side of the first surface and is protruded toward one side of the second surface.

2. The fan of claim 1,

the distance from the connecting end to the free end is L;

the distance between the starting point of the tooth part and the end point of the tooth part is S, and the value range of S is 0.3 xL to 0.9 xL.

3. The fan of claim 2,

the tooth part comprises n teeth, and the distance between the tops of two adjacent teeth in the direction from the connecting end to the free end is equal to the ratio of S to n; the value of n is 1 to 9.

4. The fan of claim 1,

the teeth are located on a portion of the leading edge of the blade proximate the free end.

5. The fan of claim 2,

the protruding height A of the tooth part protruding towards one side of the first surface and/or protruding towards the second surface ranges from 0.008 xL to 0.08 xL.

6. The fan of claim 1, further comprising:

the blade is a three-dimensional blade.

7. The fan according to any one of claims 1 to 6, comprising:

a first stage fan blade;

a second stage fan blade;

the driving assembly is connected with the first-stage fan blades and the second-stage fan blades;

the first-stage fan blades are upstream fan blades, the second-stage fan blades are downstream fan blades, and the first-stage fan blades and/or the second-stage fan blades comprise the hubs and the blades.

8. The fan of claim 7,

the first-stage fan blades and the second-stage fan blades rotate in opposite directions.

9. An outdoor unit of an air conditioner, comprising:

a housing provided with an air outlet;

the air guide ring is arranged at the air outlet; and

the blower of any one of claims 1-8, wherein the blower is disposed on the housing and within the wind-guiding ring.

10. An air conditioning system, comprising:

the blower of any one of claims 1-8; or

The outdoor unit of claim 9.