CN118167668A - Air supply assembly and air supply device - Google Patents

Abstract

The invention discloses an air supply assembly and an air supply device, wherein the air supply assembly comprises two axial flow wind wheels for forming disrotatory air flow, the two axial flow wind wheels are a first axial flow wind wheel and a second axial flow wind wheel which are axially distributed, and the first axial flow wind wheel is positioned on the air inlet side of the second axial flow wind wheel; the axial flow wind wheel comprises a hub and a plurality of blades which are annularly arranged on the periphery of the hub, the center of the hub is used as a circle center, the diameter which is larger than or equal to the outer diameter of the hub is used as a reference base circle, and the reference base circle is used for cutting through the blades along the axial direction of the hub to form a reference section; the reference section is provided with a reference curve representing the extending direction, an included angle between a chord of the reference curve and the axial direction of the hub is a reference angle, and the reference angle of the first axial flow wind wheel is larger than that of the second axial flow wind wheel. The technical scheme of the invention aims at providing a large-air-quantity and small-size air supply assembly.

Description

Air supply assembly and air supply device

Technical Field

The invention relates to the field of air supply equipment, in particular to an air supply assembly and an air supply device.

Background

In the related art, an outdoor unit of an air conditioner comprises a wind wheel, the wind wheel rotates to generate directional flowing air to pass through a heat exchanger, the air exchanges heat with the heat exchanger, in order to enable the heat exchanger to have better heat exchange efficiency, the air supply quantity of the wind wheel is generally required to be increased, in the related art, a double wind wheel in a parallel connection mode is generally adopted, or the diameter of a fan blade is increased to increase the air quantity, however, the two modes can cause larger size of the whole air conditioner, difficulty in assembly is brought, and the cabinet loading quantity is small and the transportation cost is high.

Disclosure of Invention

The invention mainly aims to provide an air supply assembly, and aims to provide an air supply assembly with large air quantity and small size.

In order to achieve the above purpose, the air supply assembly provided by the invention comprises two axial flow wind wheels for forming disrotatory air flow, wherein the two axial flow wind wheels are a first axial flow wind wheel and a second axial flow wind wheel which are axially distributed, and the first axial flow wind wheel is positioned on the air inlet side of the second axial flow wind wheel;

The axial flow wind wheel comprises a hub and a plurality of blades which are annularly arranged on the periphery of the hub, the center of the hub is used as a circle center, the diameter which is larger than or equal to the outer diameter of the hub is used as a reference base circle, and the reference base circle is used for cutting through the blades along the axial direction of the hub to form a reference section;

The reference section is provided with a reference curve representing the extending direction, an included angle between a chord of the reference curve and the axial direction of the hub is a reference angle, and the reference angle of the first axial flow wind wheel is larger than that of the second axial flow wind wheel.

Optionally, taking the ratio of the shortest distance from the reference section to the outer periphery of the hub to the shortest distance from the top of the fan blade to the outer periphery of the hub as a reference ratio, when the range of the reference ratio is between 0.6 and 1, the magnitude of the reference angle of the first axial flow wind wheel is positively correlated with the reference ratio, and the magnitude of the reference angle of the second axial flow wind wheel is negatively correlated with the reference ratio.

Optionally, when the reference ratio is in the range of 0 to 0.5, the magnitude of the reference angle of the first axial flow wind wheel is inversely related to the reference ratio, and the magnitude of the reference angle of the second axial flow wind wheel is positively related to the reference ratio.

Optionally, the fan blade has pressure face and suction face that the back of the body set up, the top of fan blade is equipped with the water conservancy diversion turn-ups, the water conservancy diversion turn-ups turns over towards the suction face to extend towards deviating from the direction of wheel hub.

Optionally, the turning angle of the diversion turning edge is 10 degrees to 80 degrees.

Optionally, the turnover angle of the second axial flow wind wheel is greater than or equal to the turnover angle of the first axial flow wind wheel.

Optionally, the axial flow wind wheel forms a reference projection plane along the axial projection, and the projection width of the diversion flange on the normal direction of the hub is 0.01 to 0.04 times of the projection diameter of the corresponding axial flow wind wheel on the reference projection plane.

Optionally, on the reference projection plane, a projection diameter of the first axial flow wind wheel is greater than or equal to a projection diameter of the second axial flow wind wheel.

Optionally, the air supply assembly further includes a flow guiding member, the flow guiding member is formed with a flow guiding channel, and at least one axial flow wind wheel part is located in the flow guiding channel.

Optionally, the blade part of the first axial flow wind wheel is accommodated in the diversion channel, and the second axial flow wind wheel is integrally accommodated in the diversion channel.

Optionally, at least 10% of the blades of the first axial flow wind wheel are accommodated in the diversion channel.

The invention also provides an air supply device which comprises the air supply assembly.

Optionally, the air supply device is an air conditioner or a fan.

According to the technical scheme, the counter-rotating air flow is formed through the double-blade supercharging mode of the two-stage wind wheels, and the static pressure of the fan blades is improved, so that the air outlet volume and the air supply distance of the air supply assembly are improved, the effect of improving the ventilation capability of the air supply assembly can be achieved, and the air supply volume of the air supply assembly is increased. And the two-stage wind wheels are distributed in a mode of being connected in series in the axial direction, so that the miniature design of the air supply assembly is facilitated. In addition, the technical scheme of the invention realizes the further improvement of the air supply quantity of the air supply assembly by designing the reference angles of the first axial flow wind wheel and the second axial flow wind wheel without increasing the diameter of the fan blade, thereby further avoiding the increase of the size of the air supply assembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram illustrating an assembly structure of an air supply assembly according to an embodiment of the present invention in an outdoor unit of an air conditioner;

FIG. 2 is a schematic cross-sectional view of an embodiment of an air supply assembly of the present invention in an outdoor unit of an air conditioner;

FIG. 3 is a schematic view of an axial flow wind wheel of an embodiment of a blower assembly according to the present invention;

FIG. 4 is an orthographic view of an embodiment of an axial flow wind turbine of the air supply assembly of the present invention;

FIG. 5 is a schematic view of a partial structure of an embodiment of an axial flow wind turbine of the air supply assembly of the present invention;

FIG. 6 is a side perspective view of an embodiment of an axial flow rotor of the air moving device of the present invention;

FIG. 7 is a graph of reference angles of an embodiment of blades of an axial flow rotor of an air supply device according to the present invention;

FIG. 8 is a graph showing the power versus air volume ratio of an embodiment of an adjusted air plenum and an unadjusted air plenum using the teachings of the present invention;

FIG. 9 is a noise-air volume comparison diagram of an embodiment of an adjusted air supply assembly and an unadjusted air supply assembly according to the present invention.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name
				100	Axial flow wind wheel	210	Diversion channel
101	First axial flow wind wheel	300	Motor with a motor housing
				102	Second axial flow wind wheel	410	Bottom cover
110	Hub	420	Top cover
				120	Fan blade	430	Front panel
121	Fan blade	440	Side wall plate
				122	Diversion flanging	450	Heat exchanger
123	Pressure surface	460	Supporting frame
				124	Suction surface	470	Front net cover
200	Flow guiding piece

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

The terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides an air supply assembly.

In an embodiment of the present invention, as shown in fig. 1 to 3, the air supply assembly includes two axial flow wind wheels 100 for forming a counter-rotating air flow, and the two axial flow wind wheels 100 are a first axial flow wind wheel 101 and a second axial flow wind wheel 102 which are distributed along an axial direction, and the first axial flow wind wheel 101 is located on an air inlet side of the second axial flow wind wheel 102; the axial-flow wind wheel 100 includes a hub 110 and a plurality of blades 120 circumferentially disposed around the hub 110, and uses a center of the hub 110 as a center of the hub 110 and uses a diameter greater than or equal to an outer diameter of the hub 110 as a reference base circle, the reference base circle cuts through the blades 121 along an axial direction of the hub 110 to form a reference section, referring to fig. 6, the reference section has a reference curve L1 representing an extending direction, an included angle between a chord L2 of the reference curve and the axial direction of the hub 110 is a reference angle β, and a reference angle of the first axial-flow wind wheel 101 is greater than a reference angle of the second axial-flow wind wheel 102.

According to the technical scheme, the counter-rotating air flow is formed through the double-blade supercharging mode of the two-stage wind wheels, and the static pressure of the fan blades is improved, so that the air outlet volume and the air supply distance of the air supply assembly are improved, the effect of improving the ventilation capability of the air supply assembly can be achieved, and the air supply volume of the air supply assembly is increased. And the two-stage wind wheels are distributed in a mode of being connected in series in the axial direction, so that the miniature design of the air supply assembly is facilitated. In addition, the technical scheme of the invention realizes the further improvement of the air supply quantity of the air supply assembly by designing the reference angles of the first axial flow wind wheel 101 and the second axial flow wind wheel 102, and the increase of the size of the air supply assembly is further avoided as the diameter of the fan blade does not need to be increased.

It will be appreciated that, by the through-cutting of the fan blades 121 by the reference base circles with different diameters, a reference section with different distances from the outer periphery of the hub 110 can be formed, and the extending direction represented by the reference curve L1 is the extending direction of the corresponding fan blade 121 from the air inlet side to the air outlet side, and without losing generality, the fan blade 121 is set to have a uniform thickness in the direction, so that the intersecting line of the reference section and the pressure surface 123 or the suction surface 124 can be used as the reference curve L1. The reference angle β is the angle between the chord L2 of the reference curve and the axial direction of the hub 110, and the reference angle β can also represent the extending direction of the fan blade 121 at the positions with different distances from the periphery of the hub 110, and the larger the reference angle β, the more deviated the fan blade 121 from the axial direction of the hub 110. In this embodiment, the reference angle of the fan blade 121 of the first axial flow wind wheel 101 at any position is larger than the reference angle of the second axial flow wind wheel 102, which is favorable for improving the air suction capability of the first axial flow wind wheel 101, so as to ensure the air intake of the air supply assembly, and is favorable for reducing the air pressure suffered by the second axial flow wind wheel 102, so as to ensure the air outlet of the air supply assembly, thereby further increasing the air supply of the air supply assembly. In addition, as shown in fig. 1, the axial direction of the blades 121 of the first axial flow wind wheel 101 and the second axial flow wind wheel 102 is opposite to the axial direction of the corresponding hub 110, and at this time, the rotation directions of the first axial flow wind wheel 101 and the second axial flow wind wheel 102 are opposite to each other to form a counter-rotating air flow, or the axial direction of the blades 121 of the first axial flow wind wheel 101 and the second axial flow wind wheel 102 is the same as the axial direction of the corresponding hub 110, and the rotation directions of the first axial flow wind wheel 101 and the second axial flow wind wheel 102 are the same to form a counter-rotating air flow.

Further, in this embodiment, the ratio between the shortest distance from the reference section to the outer periphery of the hub 110 and the shortest distance from the top of the fan blade 121 to the outer periphery of the hub 110 is taken as a reference ratio, and when the reference ratio epsilon is in the range of 0.6 to 1, the magnitude of the reference angle of the first axial flow wind wheel 101 is positively correlated with the reference ratio, and the magnitude of the reference angle of the second axial flow wind wheel 102 is negatively correlated with the reference ratio. In this way, the air suction capability of the blade tops of the blades 120 of the first axial flow wind wheel 101 can be further increased, so as to further ensure the air inlet volume of the air supply assembly, and the wind pressure received by the blade tops of the blades 120 of the second axial flow wind wheel 102 can be further reduced, so as to further ensure the air outlet volume of the air supply assembly, and further increase the air supply volume of the air supply assembly.

In addition, the fan blade 121 has a pressure surface 123 and a suction surface 124 opposite to each other, it can be understood that one end of the fan blade 120 close to the hub 110 is the bottom thereof, and one end far away from the hub 110 is the top thereof, when the axial flow wind wheel 100 is installed in the flow guiding channel 210, a gap exists between the top of the fan blade 120 and the flow guiding member 200, and when the front edge of the fan blade 121 cuts the airflow, the pressure surface 123 and the suction surface 124 are respectively formed on two opposite sides of the fan blade 121, the airflow of the pressure surface 123 flows back to the suction surface 124 through the gap between the fan blade 120 and the flow guiding member 200, so that a shedding vortex is formed at the gap, and the vortex shedding generates an alternating force, which causes structural vibration of the fan blade 120 and the flow guiding member 200, so that the running noise of the fan blade 120 is overlarge. In the technical solution of this embodiment, by increasing the air suction capability of the fan blade 120 of the first axial flow wind wheel 101 at the top of the blade and reducing the wind pressure of the fan blade 120 of the second axial flow wind wheel 102 at the top of the blade, the backflow of the air flow from the pressure surface 123 to the suction surface 124 at the top of the fan blade 120 of the axial flow wind wheel 100 can be suppressed, so as to suppress the formation of the shedding rotational flow, thereby reducing the operation noise of the axial flow wind wheel 100 and being beneficial to improving the use experience of the user.

Further, in the present embodiment, when the reference ratio ranges from 0 to 0.5, the magnitude of the reference angle of the first axial flow wind wheel 101 is inversely related to the reference ratio, and the magnitude of the reference angle of the second axial flow wind wheel 102 is positively related to the reference ratio. In this way, the layout and the forming of the blades 120 of the two axial flow wind wheels 100 at the periphery of the hub 110 can be facilitated, and the reference angles of the first axial flow wind wheel 101 and the second axial flow wind wheel 102 can be controlled in a proper range, so that on the premise of ensuring that the reference angle of the first axial flow wind wheel 101 is larger than the reference angle of the second axial flow wind wheel 102, the reference angle of the first axial flow wind wheel 101 can be gradually increased in a section area close to the blade tip, and the reference angle of the second axial flow wind wheel 102 can be gradually reduced in a section area close to the blade tip, so as to ensure the attenuation effect on noise at the blade tip of the two-stage axial flow wind wheel 100.

Without loss of generality, the ratio of the reference angle to 90 degrees is defined as a dimensionless value λ, and the magnitude of λ can be represented as the magnitude of the reference angle, please refer to fig. 7, in which curve one and curve two show the trend of the λ values of the first axial flow wind wheel 101 and the second axial flow wind wheel 102 along with the reference ratio ε, respectively. In the first curve, when the reference ratio is in the range of 0 to 0.5, the lambda value of the first axial flow wind wheel 101 decreases with the increase of the reference ratio epsilon, and when the reference ratio epsilon is in the range of 0.6 to 1, the lambda value of the first axial flow wind wheel 101 increases with the increase of the reference ratio epsilon; in curve two, the lambda value of the second axial flow wind wheel 102 increases with increasing reference ratio epsilon when the reference ratio epsilon is in the range of 0 to 0.5, and the lambda value of the second axial flow wind wheel 102 decreases with increasing reference ratio epsilon when the reference ratio epsilon is in the range of 0.6 to 1. That is, as the reference ratio ε increases, the reference angle of the first axial flow wind turbine 101 decreases and then increases and the reference angle of the second axial flow wind turbine 102 increases and then decreases. When the reference ratio epsilon is in the range of 0.5 to 0.6, the first curve has a valley value and the change trend is more gentle, so that the installation angle of the first axial flow wind wheel 101 is smoothly transited in the range of the distance; the second curve has a peak value, and the change trend is also gentle, so that the installation angle of the second axial flow wind wheel 102 correspondingly and smoothly transits in the distance range. And, when the reference ratio is in the range of 0.5 to 0.6, the first and second curves are very close, i.e. the reference angles of the first axial flow wind wheel 101 and the second axial flow wind wheel 102 are very close, but the peak of the second curve is below the valley of the first curve, i.e. it represents that the reference angle at any position of the fan blade 121 of the first axial flow wind wheel 101 is larger than the reference angle of the second axial flow wind wheel 102. In addition, at the top of the fan blade 121 of the first axial flow wind wheel 101, the reference angle reaches a maximum value, and as can be seen from fig. 7, the maximum value of the reference angle of the first axial flow wind wheel 101 is less than 63 degrees; at the top of the fan blade 121 of the second axial flow fan 102, the reference angle reaches the minimum value, and as can be seen from fig. 7, the minimum value of the second axial flow fan 102 is greater than 27 degrees; while the minimum value of the reference angle of the first axial flow wind wheel 101 corresponds to the valley value of the curve one, and the maximum value of the reference angle of the second axial flow wind wheel 102 corresponds to the peak value of the curve two, both of which may be between 40 degrees and 42 degrees, as can be seen with reference to fig. 7.

Further, in the present embodiment, as shown in fig. 1 and 2, the air supply assembly further includes a flow guiding member 200, where the flow guiding member 200 is formed with a flow guiding channel 210, and at least one axial flow wind wheel 100 is partially located in the flow guiding channel 210. In this way, the air flow guiding channel 210 can guide the air flow of the airflow wind wheel 100, so as to inhibit the air flow from flowing back, and be beneficial to increasing the air flow of the air supply assembly.

Further, in the present embodiment, as shown in fig. 2, the fan blades 120 of the first axial flow wind wheel 101 are partially accommodated in the flow guiding channel 210, and the second axial flow wind wheel 102 is integrally accommodated in the flow guiding channel 210. In this way, the air outlet of the first axial flow wind wheel 101 can flow to the second axial flow wind wheel 102 through the guiding of the guiding channel 210, so that the outflow negative pressure of the first axial flow wind wheel 101 is gathered, the pressure is increased, the outflow air flow of the first axial flow wind wheel 101 is restrained from flowing back, and the air supply quantity of the air supply assembly is further improved. Further, the first axial flow wind wheel 101 has at least 10% of the blades 120 accommodated in the diversion channel 210, so as to effectively inhibit the backflow of the outflow air flow of the first axial flow wind wheel 101. It is preferable that 10% of the fan blades 120 of the first axial flow wind wheel 101 are accommodated in the flow guiding channel 210, that is, the flow guiding channel 210 formed by the flow guiding member 200 is enough to accommodate the second axial flow wind wheel 102 and 10% of the fan blades 120 of the first axial flow wind wheel 101, which is beneficial to reducing the size of the flow guiding member 200, saving the production materials of the flow guiding member 200, and simultaneously facilitating the space layout of the air supply assembly in the air supply device. In addition, the air supply assembly further comprises a motor 300, and the motor 300 can be installed between the first axial flow wind wheel 101 and the second axial flow wind wheel 102 or can be installed on the air inlet side of the first axial flow wind wheel 101.

Further, in this embodiment, a flow guiding flange 122 is provided at the top of the fan blade 121, and the flow guiding flange 122 is turned towards the suction surface 124 and extends in a direction away from the hub 110. In this way, the diversion flange 122 at the top of the fan blade 121 can effectively prolong the backflow path of the airflow flowing from the pressure surface 123 to the suction surface 124, inhibit vortex shedding at the top of the fan blade, reduce the return air of the airflow, thereby reducing the running noise of the axial flow wind wheel 100 and being beneficial to improving the use experience of users.

Further, in the present embodiment, the turning angle of the diversion turning edge 122 is 10 degrees to 80 degrees. It will be appreciated that the flip angle refers to the flip angle of the deflector flange 122 relative to the pressure face 123 in the normal direction of the hub 110. As shown in fig. 4 and 5, specifically, the axial-flow wind wheel 100 forms a reference projection plane along the axial direction, wherein the ratio of the width d1 of the projection of the flow guiding flange 122 in the normal direction of the hub 110 to the width d2 of the flow guiding flange 122 in the extending direction thereof is the cosine value of the flip angle θ, that is, cos θ=d1/d 2. And the turnup angle is too large or too small, the shape of the blade is close to the state without the diversion turnup 122, and when the turnup angle of the diversion turnup 122 is in the range of 10 degrees to 80 degrees, the backflow path of the airflow flowing from the pressure surface 123 to the suction surface 124 can be effectively prolonged, so that the noise reduction effect of the axial wind wheel 100 is ensured, and the use experience of a user is ensured.

Further, in the present embodiment, the turnover angle θ2 of the second axial flow wind wheel 102 is greater than or equal to the turnover angle θ1 of the first axial flow wind wheel 101. In this way, the width of the flow guiding flange 122 of the second axial flow wind wheel 102 in the extending direction is greater than or equal to the width of the flow guiding flange 122 of the first axial flow wind wheel 101 in the extending direction, so that the flow returning path of the second axial flow wind wheel 102 can be greater than or equal to the flow returning path of the first axial flow wind wheel 101, and the vortex shedding at the top of the fan blade 120 of the second axial flow wind wheel 102 is inhibited to a greater extent, thereby avoiding the shedding rotational flow of the second axial flow wind wheel 102 from adversely affecting the running state of the first axial flow wind wheel 101. Of these, θ1=30 degrees, and θ2=33 degrees are preferable.

Further, in the present embodiment, referring to fig. 4, in the reference projection plane, a projection width D1 of the guide flange 122 in a normal direction of the hub 110 is 0.01 to 0.04 times a projection diameter D of the corresponding axial flow wind wheel 100. In this way, the width d2 of the flow guiding flange 122 in the extending direction thereof can be sufficiently large, so that the flow guiding flange 122 can provide a sufficiently long backflow path for the airflow at the top of the blade, so as to ensure the noise reduction effect on the axial wind wheel 100, and further ensure the use experience of the user. The projection width D1 of the diversion flange 122 in the normal direction of the hub 110 is preferably equal to 0.015 times of the projection diameter D of the corresponding axial-flow wind wheel 100.

Further, in the present embodiment, the projection diameter D1 of the first axial flow wind wheel 101 is greater than or equal to the projection diameter D2 of the second axial flow wind wheel 102 on the reference projection plane. In this way, by differentiating the first axial flow wind wheel 101 and the second axial flow wind wheel 102, the first axial flow wind wheel 101 can have a sufficient diameter, so that the air supply assembly has a sufficient air intake, and the air supply amount of the air supply assembly is increased, while the diameter of the second axial flow wind wheel 102 can be properly reduced, which is beneficial to the miniaturization design of the air supply assembly. Preferably, the projection diameter D1 of the first axial flow wind wheel 101 on the reference projection plane is smaller than or equal to 1.1 times of the projection diameter D2 of the second axial flow wind wheel 102 on the reference projection plane, that is, D2 is smaller than or equal to D1 is smaller than or equal to 1.1D2, so as to ensure the miniaturization design of the air supply assembly while increasing the air supply amount of the air supply assembly, wherein d1= 1.05D2 is preferable.

Referring to fig. 8 and 9, the air supply assembly is adjusted according to the above parameters, compared with the unadjusted air supply assembly, the power consumption and noise of the adjusted air supply assembly are reduced at the same air volume, and the air volume of the adjusted air supply assembly is larger at the same power. Therefore, the technical scheme of the invention is beneficial to increasing the air supply quantity of the air supply assembly and reducing the operation noise of the air supply assembly.

The invention also provides an air supply device, which comprises an air supply assembly, wherein the specific structure of the air supply assembly refers to the embodiment, and the air supply device adopts all the technical schemes of all the embodiments, so that the air supply device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted. The air supply device can be an air conditioner, a fan, fresh air equipment, a dehumidifier, an air purifier and the like, wherein in the split air conditioner, the air supply assembly can be applied to an outdoor unit and an indoor unit. As shown in fig. 1 and 2, when the air supply assembly is applied to an outdoor unit, the air supply assembly is installed in a casing of the outdoor unit, specifically, the casing of the outdoor unit includes a bottom cover 410, a top cover 420, a front panel 430 and two side panels 440, which are enclosed and form an installation site for installing a heat exchanger 450 at a rear side, a guide 200 is integrally formed on the front panel 430, a front cover 470 is provided on a front side cover of the guide 200, two axial flow fans are correspondingly installed between the heat exchanger 450 and the front cover 470 and are arranged corresponding to a guide channel 210 of the guide 200, and a motor 300 is installed between the heat exchanger 450 and the axial flow wind wheel 100 through a supporting frame 460.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (11)

1. The air supply assembly is characterized by comprising two axial flow wind wheels for forming disrotatory air flow, wherein the two axial flow wind wheels are a first axial flow wind wheel and a second axial flow wind wheel which are axially distributed, and the first axial flow wind wheel is positioned on the air inlet side of the second axial flow wind wheel;

The axial flow wind wheel comprises a hub and a plurality of blades which are annularly arranged on the periphery of the hub, the center of the hub is used as a circle center, the diameter which is larger than or equal to the outer diameter of the hub is used as a reference base circle, and the reference base circle is used for cutting through the blades along the axial direction of the hub to form a reference section;

The reference section is provided with a reference curve representing the extending direction, an included angle between a chord of the reference curve and the axial direction of the hub is a reference angle, and the reference angle of the first axial flow wind wheel is larger than that of the second axial flow wind wheel.

2. The air supply assembly of claim 1, wherein a ratio between a shortest distance of the reference cross section to an outer periphery of the hub and a shortest distance of a top of the fan blade to the outer periphery of the hub is taken as a reference ratio, and when the reference ratio ranges from 0.6 to 1, a magnitude of a reference angle of the first axial flow wind wheel is positively correlated with the reference ratio, and a magnitude of a reference angle of the second axial flow wind wheel is negatively correlated with the reference ratio.

3. The air supply assembly of claim 2 wherein the magnitude of the reference angle of the first axial flow wind wheel is inversely related to the reference ratio and the magnitude of the reference angle of the second axial flow wind wheel is positively related to the reference ratio when the reference ratio is in the range of 0 to 0.5.

4. The air supply assembly of claim 1, wherein the fan blade has a pressure side and a suction side opposite each other, and a flow guiding flange is provided at a top of the fan blade, and the flow guiding flange is turned towards the suction side and extends in a direction away from the hub.

5. The air supply assembly of claim 4 wherein the deflector flange has a flange angle of 10 degrees to 80 degrees;

and/or, the turnover angle of the second axial flow wind wheel is greater than or equal to the turnover angle of the first axial flow wind wheel.

6. The air supply assembly according to claim 4, wherein the axial flow wind wheel is axially projected to form a reference projection surface, and a projection width of the diversion flange on a normal direction of the hub is 0.01 to 0.04 times of a projection diameter of the corresponding axial flow wind wheel on the reference projection surface, and/or the projection diameter of the first axial flow wind wheel is greater than or equal to a projection diameter of the second axial flow wind wheel.

7. The air supply assembly of any one of claims 1 to 6, further comprising a flow guide member defining a flow guide passage, at least one of the axial flow wind wheel portions being located within the flow guide passage.

8. The air supply assembly of claim 7 wherein the fan blade portion of the first axial flow fan is received in the flow guide channel and the second axial flow fan is integrally received in the flow guide channel.

9. The air supply assembly of claim 8 wherein at least 10% of said fan blades are received in said flow guide channel.

10. An air moving device comprising the air moving assembly of any one of claims 1 to 9.

11. The air supply device of claim 10, wherein the air supply device is an air conditioner or a fan.