1. A fan, comprising:

the air guide ring is provided with a stator;

the first-stage fan blade is connected with the air guide ring through a first bearing and is positioned in the air guide ring;

the first stage fan blade includes:

the outer side wall of the first blade shroud is connected with the air guide ring through the first bearing, and the first blade shroud is made of a magnetic material;

a first blade connected to an inner sidewall of the first shroud;

wherein the first shroud is configured to be rotatable relative to the wind-guiding ring.

2. The fan of claim 1, further comprising:

the second-stage fan blade is connected with the air guide ring through a second bearing and is positioned in the air guide ring, the first-stage fan blade is used as an upstream fan blade, and the second-stage fan blade is used as a downstream fan blade;

the second stage fan blade comprises:

the outer side wall of the second blade shroud is connected with the air guide ring through the second bearing, and the second blade shroud is made of a magnetic material;

a second blade connected to an inner sidewall of the second shroud;

the second blade shroud is configured to be capable of rotating relative to the wind guide ring, and the rotating direction of the first blade shroud is opposite to that of the second blade shroud.

3. The fan of claim 2, wherein the wind deflector comprises:

the first blade shroud is embedded on the first air guide ring, the first blade shroud is connected with the first air guide ring through the first bearing, a first stator is arranged on the first air guide ring, and the first blade shroud is configured to rotate relative to the first stator;

the second wind guide ring is embedded in the second blade crown, the second blade crown is connected with the second wind guide ring through the second bearing, the second blade crown is provided with a second stator, and the second blade crown can rotate relative to the second stator.

4. The fan of claim 2,

the number of the first blades is greater than or equal to the number of the second blades.

5. The fan of claim 3,

along the direction of the rotation axis of the first blade shroud, the projection of the first blade shroud on the rotation axis is located within the projection of the first stage fan blade on the rotation axis.

6. The fan of claim 5,

and a gap is formed between the first blade positioned outside the first blade shroud and the inner wall of the first wind guide ring.

7. The fan according to any one of claims 2 to 6,

the radius of the first shroud is R1;

the radius of the second shroud is R2;

an axial distance between the first shroud and the second shroud along an axis of rotation of the first shroud is 0.02 xr 1 to 2 xr 1; or

An axial distance between the first shroud and the second shroud along an axis of rotation of the second shroud is 0.02 xr 2 to 2 xr 2.

8. The fan of claim 3, wherein the first wind deflector comprises:

the first main body is connected with the second air guide ring;

the contraction part is connected with one end, far away from the second air guide ring, of the first main body, and a transition arc is formed between the contraction part and the first main body;

the circle center of the transition arc is located outside the first air guide ring.

9. The fan as recited in claim 8,

the radius of the first shroud is R1, and the corresponding radius of the transition arc ranges from 0.01 × R1 to 2 × R1.

10. The fan of claim 3,

and the air outlet end of the second air guide ring is provided with an expansion part extending to the outside of the second air guide ring.

11. The fan of claim 3, further comprising:

and the third-stage fan blade is arranged on the second air guide ring and is positioned in the second air guide ring.

12. The fan of claim 1, further comprising:

the air guide cover is connected with the air guide ring;

the fourth-stage fan blade is arranged in the air guide cover;

the output end of the motor is connected with the fourth stage fan;

wherein the rotation direction of the fourth stage fan is opposite to the rotation direction of the first shroud.

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

a housing; and

the blower of any one of claims 1-12, the blower disposed at an air outlet of the housing.

14. The outdoor unit of claim 13, further comprising:

the heat exchanger is arranged in the shell and is positioned between the air inlet and the air outlet of the shell;

and the electric control assembly is arranged on the shell.

15. The outdoor unit of claim 14, wherein,

the radius of the first shroud is R1;

the axial distance between the electric control assembly and the first stage fan blade along the rotating axis direction of the first blade shroud is larger than 0.02 multiplied by R1.

16. The outdoor unit of any one of claims 13 to 15, further comprising:

and the mesh enclosure is covered at the air outlet end of the fan.

17. An air conditioner, comprising:

the blower of any one of claims 1-12; or

The outdoor unit of any one of claims 13 to 16.

Background

In the prior art, most of fans of the air conditioner outdoor unit are composed of motors, motor supports and fan blades, and the arrangement of the motors and the motor supports in the air guide ring easily causes negative influence on the air supply performance of the fans due to the limited space in the air guide ring.

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 conditioner.

In view of this, a first aspect of the present invention provides a fan comprising: the air guide ring is provided with a stator; the first-stage fan blade is connected with the air guide ring through a first bearing and is positioned in the air guide ring; the first stage fan blade includes: the outer side wall of the first blade shroud is connected with the air guide ring through a first bearing, and the first blade shroud is made of a magnetic material; the first blade is connected with the inner side wall of the first blade shroud; wherein the first shroud is configured to be rotatable relative to the wind-guiding ring.

The fan provided by the invention has the advantages that the first blade shroud made of magnetic materials is matched with the air guide ring with the stator, so that the first blade shroud can rotate relative to the air guide ring, and further the blades arranged on the blade shroud are driven to rotate, and the shaftless fan is formed.

Specifically, the first shroud made of a magnetic material interacts with the stator by using the electromagnetic induction principle, and the rotor and the stator rotate relatively. The first blade crown is provided with a first cavity which penetrates through the first blade crown and is of a cylindrical structure, the first cavity is a through cavity which is formed by surrounding a cylinder, the first-stage fan blade comprises a plurality of first blades, the blade tops of the first blades are connected with the inner wall of the first cavity, gaps among the blade tops of the first blades are eliminated, and the air supply efficiency of the fan is greatly improved.

Further, the wind guiding ring can be integrally used as a stator structure, or a part which is in matched connection with the first blade shroud can be used as the stator structure.

In addition, the fan in the above technical solution provided by the present invention may also have the following additional technical features:

in the above technical solution, further, the method further includes: the second-stage fan blade is connected with the air guide ring through a second bearing and is positioned in the air guide ring, the first-stage fan blade is used as an upstream fan blade, and the second-stage fan blade is used as a downstream fan blade; the second stage fan blade includes: the outer side wall of the second blade shroud is connected with the air guide ring through a second bearing, and the second blade shroud is made of a magnetic material; the second blade is connected with the inner side wall of the second blade crown; the second blade shroud is configured to be capable of rotating relative to the wind guide ring, and the rotating direction of the first blade shroud is opposite to that of the second blade shroud.

In the technical scheme, the second-stage fan blades are arranged in the air guide ring, so that the first-stage fan blades serve as upstream fan blades, the second-stage fan blades serve as downstream fan blades, the rotating directions of the first-stage fan blades and the second-stage fan blades are opposite, a shaftless counter-rotating fan is further formed, the air pressure is increased under the counter-rotating action of the two-stage fan blades, and the air supply efficiency of the fan is further improved. Specifically, the second blade cap made of magnetic material interacts with the stator by utilizing the electromagnetic induction principle, and the relative rotation of the rotor and the stator is realized. The second blade crown is provided with a second cavity which penetrates through the second blade crown and is of a cylindrical structure, the second cavity is a through cavity, the second-stage fan blade also comprises a plurality of second blades, and the blade tops of the second blades are connected with the inner wall of the second cavity, so that gaps among the blade tops of the second blades are eliminated.

In any one of the above technical solutions, further, the air guide ring includes: the first blade crown is embedded on the first air guide ring, the first blade crown is connected with the first air guide ring through a first bearing, a first stator is arranged on the first air guide ring, and the first blade crown is configured to rotate relative to the first stator; the second wind guide ring is embedded in the second blade crown, the second blade crown is connected with the second wind guide ring through a second bearing, the second blade crown is provided with a second stator, and the second blade crown is configured to rotate relative to the second stator.

In the technical scheme, the wind guide ring of the fan comprises a first wind guide ring and a second wind guide ring, the stator comprises a first stator and a second stator, the first blade crown is embedded in the first wind guide ring, and the second blade crown is embedded in the second wind guide ring. The first blade crown and the second blade crown are respectively used as a first rotor and a second rotor, are matched with the first stator and the second stator, and mutually rotate in opposite directions relative to the fixed stator by utilizing the electromagnetic induction principle, so that the disrotatory of two stages of fan blades is realized. Meanwhile, the wind pressure is increased when the airflow passes through the two stages of fan blades by utilizing the collection and diversion effects of the first air guide ring and the second air guide ring on the airflow, and the air supply efficiency is further improved.

Further, the first stator and the first air guide ring can be of an integrated structure or a split structure; the second stator and the second air guide ring can be of an integrated structure or a split structure, and can be set according to practical application.

In any of the above technical solutions, further, the number of the first blades is greater than or equal to the number of the second blades.

In the technical scheme, the number of the first blades of the first-stage fan blades is greater than or equal to the number of the second blades of the second-stage fan blades. Specifically, if the number of the blades of the first-stage fan blade is greater than that of the blades of the second-stage fan blade, the distribution of the blades of the first-stage fan blade is denser than that of the blades of the second-stage fan blade, and the airflow firstly enters the first-stage fan blade, so that the work-doing capacity of the first-stage fan blade is increased. If the number of the blades of the first-stage fan blades is equal to that of the blades of the second-stage fan blades, the blades of the two-stage fan blades are distributed identically, so that air flow uniformly passes through the two counter-rotating fan blades, and resistance is reduced. The specific setting can be determined according to the actual conditions, and the requirements of different application occasions are met.

In any of the above technical solutions, further, along the direction of the rotation axis of the first blade shroud, a projection of the first blade shroud on the rotation axis is located within a projection of the first stage blade on the rotation axis.

In this technical scheme, the projection length of first order flabellum on the axis of rotation of first blade crown is greater than the projection length of first blade crown on the axis of rotation, and the axial of first order flabellum is not covered by first blade crown completely promptly, and the part blade top of the first order flabellum that is close to the air inlet end is not connected with first blade crown, sets up like this and does benefit to the air current and gets into the fan from all directions, is convenient for collect the air current.

In any of the above technical solutions, further, a gap is provided between the first blade located outside the first shroud and the inner wall of the first wind guiding ring.

In the technical scheme, a gap is formed between a part of the first-stage fan blade, corresponding to the projection length of the first shroud, on the rotation axis of the first shroud, and the inner wall of the first air guide ring, namely, a gap is formed between the part, not connected with the first shroud, of the blade top of the first-stage fan blade and the air guide ring, so that the air guide ring covers the first-stage fan blade, meanwhile, the first-stage fan blade is prevented from colliding with the air guide ring in the rotation process, air flow smoothly enters the first-stage fan blade under the flow guide effect of the air guide ring, and the air supply capacity of the fan is further improved.

In any of the above solutions, further, the radius of the first shroud is R1; the radius of the second shroud is R2; an axial distance between the first shroud and the second shroud along the axis of rotation of the first shroud is 0.02 xr 1 to 2 xr 1; or the axial distance between the first shroud and the second shroud along the axis of rotation of the second shroud is 0.02 xr 2 to 2 xr 2.

In the technical scheme, the radius of the first shroud is set to be R1; the radius of the second shroud is R2. Thereby defining an axial distance between the first shroud and the second shroud of 0.02 xr 1 to 2 xr 1 or 0.02 xr 2 to 2 xr 2. The first-stage fan blades and the second-stage fan blades are prevented from interfering and colliding during rotation.

In any one of the above technical solutions, further, the first wind guiding ring includes: the first main body is connected with the second air guide ring; the contraction part is connected with one end, far away from the second air guide ring, of the first main body, and a transition arc is formed between the contraction part and the first main body; the circle center of the transition arc is located outside the first air guide ring.

In this technical scheme, first wind-guiding circle includes first main part and constriction. The first main body is connected with the second air guide ring to ensure the structural integrity of the air guide ring. The contraction part is connected with one end of the first main body, which is far away from the second air guide ring, and a transition arc is formed between the contraction part and the first main body, so that the first air guide ring can be contracted when the inner space is not limited, and the structure is compact; no shrinkage is required to accommodate the shape of the internal structure when the internal space is limited. The circle center of the transition arc is arranged outside the first air guide ring, so that the air inlet end of the first air guide ring is expanded outwards, and the collection and the introduction of air flow are facilitated.

In any of the above technical solutions, further, the radius of the first shroud is R1, and the corresponding radius of the transition arc has a value ranging from 0.01 × R1 to 2 × R1.

In this embodiment, the radius of the first shroud is set to R1. The corresponding radius of the transition arc is thus set to a value in the range of 0.01 xr 1 to 2 xr 1. The contraction part of the first air guide ring cannot reduce air supply efficiency due to overlarge radius of the transition arc, and the contraction part of the first air guide ring keeps an outward expanded shape, so that air flow collection and introduction are facilitated.

In any of the above technical solutions, further, the air outlet end of the second air guiding ring is provided with an expansion portion extending to the outside of the second air guiding ring.

In the technical scheme, the air outlet end of the second air guide ring is provided with the expansion part extending to the outside of the second air guide ring, so that air flow is expanded outwards when passing through the air outlet end, partial air speed and resistance are reduced, capacity loss is reduced, dynamic pressure is convenient to recover, and air supply efficiency is improved.

In any one of the above technical solutions, further, the fan further includes: and the third-stage fan blade is arranged on the second air guide ring, is positioned in the second air guide ring and is close to one side of the air outlet end.

In the technical scheme, the third-stage fan blade is fixed inside the second air guide ring and is close to the air outlet end, so that the flow direction of air flow is changed when the air flow passes through the third-stage fan blade, and the air supply efficiency is further improved.

In any one of the above technical solutions, further, the fan further includes: the air guide cover is connected with the air guide ring; the fourth-stage fan blade is arranged in the air guide cover; the output end of the motor is connected with the fourth-stage fan blade; the rotation direction of the fourth stage fan blade is opposite to that of the first blade crown.

In the technical scheme, one fan in the contra-rotating fans is a shaftless fan, and the other fan comprises a motor, a fourth-stage fan blade and an air guide cover; the output end of the motor is connected with the fourth-stage fan blade and is opposite to the direction of rotation of the first blade crown, the first-stage fan blade is driven without a shaft, the fourth-stage fan blade is driven by a shaft, the structure of the counter-rotating fan is simplified through the arrangement of the motor for the two-stage fan blades, and the air supply efficiency is improved.

The invention provides an air conditioner outdoor unit in a second aspect, which comprises a shell and a fan in any one of the technical schemes, wherein the fan is arranged at an air outlet of the shell.

The air conditioner outdoor unit provided by the invention has all the beneficial effects of the fan as the fan in any technical scheme is included. Meanwhile, the air conditioner outdoor unit is provided with the shell, so that the internal structure is protected from being damaged due to certain external force. The fan is arranged at the air outlet of the shell, so that the space is saved to the maximum extent and the airflow can be discharged more easily.

In the above technical solution, further, the outdoor unit of an air conditioner further includes: the heat exchanger is arranged in the shell and is positioned between the air inlet and the air outlet of the shell; the electric control assembly is arranged on the shell.

In the technical scheme, the heat exchanger is positioned between the air inlet and the air outlet of the shell, so that air flow can enter the air conditioner outdoor unit through the heat exchanger and is further discharged by the fan. The electric control assembly is arranged on the shell, so that the inner space of the air conditioner outdoor unit is saved on the premise of ensuring that the electric control function is not influenced.

In the above technical solution, further, the radius of the first shroud is R1; the axial distance between the electric control component and the first-stage fan blade along the rotating axis direction of the first blade shroud is larger than 0.02 multiplied by R1.

In the technical scheme, the radius of the first shroud is set to be R1, so that the distance between the electric control assembly and the first-stage fan blades is limited to be larger than 0.02 multiplied by R1, and the reduction of air supply efficiency caused by air flow obstruction is avoided.

In the above technical scheme, further, the outdoor unit of the air conditioner further comprises a mesh enclosure, and the mesh enclosure is arranged at the air outlet end of the fan.

In the technical scheme, the mesh enclosure is arranged at the air outlet end of the fan, so that on one hand, the abnormal operation of the fan caused by the fact that external sundries enter the fan is prevented, and the parts in the air guide ring are effectively protected from being damaged; on the other hand, the danger caused by the fact that people or other animals touch the fan when the air conditioner outdoor unit works is avoided, and the safety of the air conditioner outdoor unit is improved.

The third aspect of the present invention provides an air conditioner, including the blower or the air conditioner outdoor unit in any one of the above technical solutions.

The air conditioner provided by the invention has all the beneficial effects of the fan or the air conditioner outdoor unit as the fan or the air conditioner outdoor unit in any technical scheme is included.

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 is a schematic structural view of an outdoor unit of an air conditioner according to an embodiment of the present invention, in which straight arrows indicate air flow directions;

fig. 2 is a schematic view of a rotor structure of the outdoor unit of the air conditioner shown in fig. 1, in which arrows indicate directions of air flows;

fig. 3 is a plan view of a rotor structure of the outdoor unit of the air conditioner shown in fig. 1;

fig. 4 is a schematic perspective view of the outdoor unit of the air conditioner shown in fig. 1;

fig. 5 is a partial structural view of the outdoor unit of the air conditioner shown in fig. 1;

FIG. 6 is a schematic view of a portion of the structure of FIG. 1 in the direction A-A;

FIG. 7 is a schematic view of the second shroud of FIG. 6 engaged with a second wind-guiding ring;

fig. 8 is a schematic enlarged view of a part of the embodiment shown in fig. 7 at B.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 8 is:

1 air conditioner outdoor unit, 100 air guide rings, 102 first air guide rings, 1022 first main body, 1024 contraction part, 104 second air guide rings, 200 first-stage fan blades, 202 first blade shroud, 204 first blades, 210 second-stage fan blades, 206 second blade shroud, 208 second blades, 212 second bearing, 300 heat exchanger, 400 electric control component, 500 shell and 600 mesh enclosure.

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.

A fan, an outdoor unit 1 of an air conditioner, and an air conditioner provided according to some embodiments of the present invention are described below with reference to fig. 1 to 8.

Example one

As shown in fig. 1, an embodiment of the first aspect of the present invention provides a wind turbine, including: wind-guiding circle 100 and first order flabellum 200.

Wherein, a stator is arranged on the wind guide ring 100; the first-stage fan blade 200 is connected with the air guide ring 100 through a first bearing and is positioned in the air guide ring 100; first stage fan blade 200 includes: the outer side wall of the first shroud 202 is connected with the wind guide ring 100 through a first bearing, and the first shroud 202 is made of a magnetic material; the first blade 204 is connected to the inner sidewall of the first shroud 202; wherein the first shroud 202 is configured to be rotatable relative to the wind-guiding ring 100.

The fan provided by the invention has the advantages that the first blade shroud 202 made of magnetic materials is matched with the air guide ring 100 with the stator, so that the first blade shroud 202 can rotate relative to the air guide ring 100, and further, the blades arranged on the blade shrouds are driven to rotate, and the shaftless fan is formed.

Specifically, the first shroud 202 made of magnetic material interacts with the stator by using the electromagnetic induction principle, so that the rotor and the stator rotate relatively. The first blade shroud 202 has a first cavity penetrating through the first blade shroud 202, and is of a cylindrical structure, the first cavity is a through cavity formed by surrounding a cylinder, the first-stage fan blade 200 has a plurality of first blades 204, and the blade tops of the first blades 204 are connected with the inner wall of the first cavity, so that gaps among the blade tops of the first blades 204 are eliminated, and the air supply efficiency of the fan is greatly improved.

Further, the wind guiding ring can be integrally used as a stator structure, or a part which is in matched connection with the first blade shroud can be used as the stator structure.

Example two

As shown in fig. 1 and fig. 2, fig. 7 and fig. 8, in the above embodiment, further, the fan further includes a second-stage fan blade 210, the second-stage fan blade 210 is connected to the wind guiding ring 100 through a second bearing 212 and is located in the wind guiding ring 100, the first-stage fan blade 200 is an upstream fan blade, and the second-stage fan blade 210 is a downstream fan blade; second stage fan blade 210 includes: the outer side wall of the second shroud 206 is connected with the wind guide ring 100 through a second bearing 212, and the second shroud 206 is made of a magnetic material; a second blade 208, the second blade 208 being connected to an inner sidewall of the second blade crown 206; wherein the second blade shroud 206 is configured to be rotatable relative to the wind guide ring 100, and the rotation direction of the first blade shroud is opposite to the rotation direction of the second blade shroud 206.

In this embodiment, the second-stage fan blade 210 is disposed in the air guiding ring 100, so that the first-stage fan blade 200 serves as an upstream fan blade, the second-stage fan blade 210 serves as a downstream fan blade, and the rotation directions of the first-stage fan blade 200 and the second-stage fan blade 210 are opposite, thereby forming a shaftless counter-rotating fan. Specifically, the second shroud 206, which is made of magnetic material, interacts with the stator by using the principle of electromagnetic induction, so that the rotor and the stator rotate relatively. Specifically, the second blade shroud 206 has a second cavity penetrating the second blade shroud 206 and is a cylindrical structure, the second cavity is a through cavity formed by enclosing a cylinder, the second-stage fan blade 210 also has a plurality of blades, and the blade tips of the blades are connected with the inner wall of the second cavity, so that gaps between the blade tips of the plurality of blades are eliminated. The first blade crown 202 and the second blade crown 206 have opposite rotation directions, so that the first-stage fan blade 200 and the second-stage fan blade 210 form contrarotation, and under the contrarotation action of the two-stage fan blades, the wind pressure is increased, and the air supply efficiency of the fan is further improved.

Further, as shown in fig. 1, 5 and 6, the wind-guiding ring 100 includes: the first wind-guiding ring 102, the first shroud 202 is embedded on the first wind-guiding ring 102, the first shroud 202 is connected with the first wind-guiding ring 102 through a first bearing, a first stator is arranged on the first wind-guiding ring 102, and the first shroud 202 is configured to be capable of rotating relative to the first stator; the second wind-guiding ring 104, the second shroud 206 is embedded on the second wind-guiding ring 104, the second shroud 206 is connected to the second wind-guiding ring 104 through a second bearing 212, the second shroud 206 is provided with a second stator, and the second shroud 206 is configured to be able to rotate relative to the second stator.

In this embodiment, the wind-guiding ring 100 of the wind turbine includes a first wind-guiding ring 102 and a second wind-guiding ring 104, the stator includes a first stator and a second stator, the first shroud 202 is embedded in the first wind-guiding ring 102, and the second shroud 206 is embedded in the second wind-guiding ring 104. The first shroud 202 and the second shroud 206 are respectively used as a first rotor and a second rotor, and are matched with a first stator and a second stator, and the first rotor and the second rotor rotate in opposite directions relative to the fixed wind guide ring 100 by utilizing the electromagnetic induction principle, so that the contrarotation of two stages of fan blades is realized. Meanwhile, the wind pressure is increased when the airflow passes through the two stages of fan blades by utilizing the collection and flow guide effects of the first air guide ring 102 and the second air guide ring 104 on the airflow, and the air supply efficiency is further improved.

Further, the first stator and the first wind guiding ring 102 may be an integrated structure or a split structure; the second stator and the second wind guiding ring 104 may be an integrated structure, or a split structure, and may be specifically set according to practical applications.

Further, as shown in FIG. 3, the number of blades of the first stage fan blade 200 is greater than that of the second stage fan blade 210.

In this embodiment, the number of blades of first stage blade 200 is greater than the number of blades of second stage blade 210. With the arrangement, the blade distribution of the first-stage fan blades 200 is denser than that of the second-stage fan blades 210, and the air flow firstly enters the first-stage fan blades 200, so that the working capacity of the first-stage fan blades 200 is increased.

In some embodiments, the number of blades of the first stage fan blade 200 can be equal to the number of blades of the second stage fan blade 210. Therefore, the blades of the two stages of fan blades are distributed identically, so that the air flow uniformly passes through the oppositely-rotated two stages of fan blades, and the resistance is reduced. The specific setting can be determined according to the actual conditions, and the requirements of different application occasions are met.

Further, as shown in FIG. 2, in the direction of the axis of rotation of the first shroud 202, the projection of the first shroud 202 on the axis of rotation is located within the projection of the first stage blade 200 on the axis of rotation. In the direction of the rotational axis of the first shroud 202, the length of the projection of the first stage blade 200 on the rotational axis of the first shroud 202 is greater than the length of the projection of the first shroud 202 on the rotational axis. That is, the axial direction of the first stage fan blade 200 is not completely covered by the first shroud 202, and the partial blade top of the first stage fan blade 200 close to the air inlet end is not connected with the first shroud 202, so that the arrangement is favorable for air flow to enter the fan from all directions, and the air flow is convenient to collect.

Further, a gap is formed between the first blade 204 located outside the first shroud 202 and the inner wall of the first wind guiding ring 102. That is, the part of the blade top of the first-stage fan blade 200 not connected with the first shroud 202 has a gap with the air guide ring, so that the air guide ring covers the first-stage fan blade 200 and simultaneously avoids the collision between the first-stage fan blade 200 and the air guide ring in the rotation process, the airflow smoothly enters the first-stage fan blade 200 under the guide effect of the air guide ring, and the air supply capacity of the fan is further improved.

In this embodiment, the radius of the first tip shroud 202 is set to R1; the second leaf crown 206 has a radius R2. Thereby defining an axial distance H between the first shroud 202 and the second shroud 206 of 0.02 xr 1 to 2 xr 1 or 0.02 xr 2 to 2 xr 2. So that first stage blades 200 and second stage blades 210 avoid interference collision when rotating.

Further, as shown in fig. 5, the first wind-guiding ring 102 includes a first main body 1022 and a constricted portion 1024. The first main body 1022 is connected to the second wind-guiding ring 104 to ensure the structural integrity of the wind-guiding ring. The contracting part 1024 is connected with one end of the first main body 1022 far away from the second air guiding ring 104, and forms a transition arc with the first main body 1022, so that the first air guiding ring 102 can be contracted when the inner space is not limited, and the structure is compact; no shrinkage is required to accommodate the shape of the internal structure when the internal space is limited. The circle center of the transition arc is arranged outside the first air guide ring 102, so that the air inlet end of the first air guide ring 102 is expanded outwards, and the collection and the introduction of air flow are facilitated.

In this embodiment, the first tip shroud 202 has a radius R1. The corresponding radius R of the transition arc is thus set to a value in the range of 0.01 xr 1 to 2 xr 1. The contraction part 1024 of the first air guiding ring 102 cannot cause air supply efficiency reduction due to the overlarge radius r of the transition arc, and meanwhile, the outward expansion shape is kept at the minimum state, so that air flow collection and introduction are facilitated.

Furthermore, the air outlet end of the second air guide ring 104 is provided with an expansion part extending to the outside of the second air guide ring 104, so that the air flow is expanded outwards when passing through the air outlet end, thereby reducing partial air speed and resistance, reducing capacity loss, facilitating dynamic pressure recovery and improving air supply efficiency.

Further, the outdoor unit 1 further includes: and a third stage fan blade. Specifically, the third stage fan blade is fixed inside the second air guide ring 104 and close to the air outlet end, and the combination of the multi-stage movable blades and the multi-stage static blades is utilized to change the flow direction of the air flow when the air flow passes through the third stage fan blade, so that the air supply efficiency is further improved.

In the embodiment, more than two stages of movable blades can be adopted, so that the air supply efficiency is further improved.

EXAMPLE III

By the fan that embodiment one provided, further, still include: wind scooper, fourth stage flabellum and motor. The wind scooper is connected with the wind guide ring 100; the fourth-stage fan blade is arranged in the air guide cover; the output end of the motor is connected with the fourth-stage fan blade; the fourth stage fan blade rotates in the opposite direction to the first shroud 202.

In the embodiment, one fan in the contra-rotating fans is a shaftless fan, and the other fan comprises a motor, a fourth-stage fan blade and an air guide cover; the output end of the motor is connected with the fourth-stage fan blade and is opposite to the direction of rotation of the first blade cap 202, the first-stage fan blade 200 is driven without a shaft, the fourth-stage fan blade is driven by a shaft, the structure of the contra-rotating fan is simplified through the arrangement of the motor drive relative to the two-stage fan blades, and the air supply efficiency is improved.

Example four

As shown in fig. 1, a second aspect of the present invention provides an outdoor unit 1 of an air conditioner, including a casing 500 and a blower fan in any of the above embodiments, the blower fan being disposed at an air outlet of the casing 500.

In this embodiment, since the fan in any one of the above embodiments is included, all the advantageous effects of the above fan are obtained. Meanwhile, the outdoor unit 1 of the air conditioner has the casing 500, which protects the internal structure from being damaged by a certain external force. The fan is disposed at the air outlet of the case 500, which maximally saves space and enables the air flow to be more easily discharged.

EXAMPLE five

As shown in fig. 1 and 4, the outdoor unit 1 further includes: a heat exchanger 300 and an electronic control assembly 400. The heat exchanger 300 is disposed in the housing 500 and located between the air inlet and the air outlet of the housing 500; the electronic control assembly 400 is disposed on the housing 500.

In this embodiment, the heat exchanger 300 is located between the air inlet and the air outlet of the casing 500, and the air flow can enter the outdoor unit 1 of the air conditioner through the heat exchanger 300 and be further discharged by the fan. The electric control assembly 400 is disposed on the casing 500, so that the inner space of the outdoor unit 1 is saved while the electric control function is not affected.

Further, as shown in fig. 5 and 6, the radius of the first shroud 202 is set to R1, so as to limit the distance L between the electronic control assembly 400 and the first stage fan blade 200 to be greater than 0.02 × R1, thereby preventing the air flow from being obstructed and reducing the air supply efficiency.

Further, the outdoor unit 1 further includes a mesh enclosure 600 disposed at the air outlet end of the fan. The mesh enclosure 600 is arranged at the air outlet end of the fan, so that on one hand, the abnormal operation of the fan caused by the fact that external sundries enter the fan is prevented, and the parts in the air guide ring are effectively protected from being damaged; on the other hand, the danger caused by the fact that people or other animals touch the fan when the air conditioner outdoor unit 1 works is avoided, and the safety of the air conditioner outdoor unit 1 is improved.

In the specific embodiment, the structure of the outdoor unit 1 of the air conditioner is as shown in fig. 1 and fig. 4, the heat exchanger 300 is arranged on the front, left and right sides of the lower part of the whole unit, the electric control assembly 400 is arranged on the back plate, and the parts such as the compressor, the pipeline and the like are arranged in the middle space of the lower part. The upper part of the whole machine consists of parts such as a first air guide ring 102, a first-stage fan blade 200, a second air guide ring 104, a second-stage fan blade 210, a mesh cover 600 and the like. The first wind-guiding ring 102 is a stator of the first-stage fan blade 200, and the corresponding rotor is the first-stage fan blade 200. The first wind-guiding ring 102 and the first-stage fan blades 200 form a first shaftless fan. The second wind-guiding ring 104 is a stator of the second-stage fan blade 210, and the corresponding rotor is the second-stage fan blade 210. The second wind-guiding ring 104 and the second stage fan blade 210 form a second shaftless fan. The two independently controlled shaftless fans have opposite rotating directions to form a shaftless contra-rotating fan.

When the fan runs, airflow enters the whole fan from the heat exchanger 300 on the front side, the left side and the right side, passes through the electric control assembly 400 and other parts, is collected by the first air guide ring 102, enters the first-stage fan blades 200 and the second-stage fan blades 210, passes through the second air guide ring 104 after the two-stage fan blades are pressurized, and then flows out of the whole fan from the mesh enclosure 600.

Fig. 2 and 3 are structural views of the rotor in this embodiment. The blade roots of the first-stage fan blade 200 and the second-stage fan blade 210 are not provided with hubs, and the blade tops of the two-stage fan blades are respectively provided with a first blade crown 202 and a second blade crown 206, so that the blade top clearance can be eliminated, and the fan efficiency is improved; only a partial region of the first stage blade 200 is covered by the first shroud 202, and nine blades of the first stage blade 200 are connected by the first shroud 202; the second shroud 206 completely wraps the second stage fan blade 210 and is connected with seven blades of the second stage fan blade 210; the first shroud 202 and the second shroud 206 are each made of an electromagnetic material as a rotor portion of the shaftless fan.

Fig. 5 and fig. 6 show the structural position relationship of the first stage fan blade 200, the second stage fan blade 210, the wind guiding ring and the electric control assembly 400. As shown in fig. 5 and 6, the direction perpendicular to the plane of the fan blades is taken as the axial direction, the radius of the fan blades is R (the value of R is R1 or R2 in the drawing, the same applies below), the range of the distance H between the trailing edge of the first-stage fan blade 200 and the leading edge of the second-stage fan blade 210 is 0.05R-0.8R, when the axial space of the whole machine is limited, the distance between the two-stage fan blades is small, and when the axial space of the whole machine is sufficient, the distance between the two-stage fan blades can be large.

The first shroud 202 is embedded in the first wind-guiding ring 102, and the second shroud 206 is embedded in the outlet wind-guiding ring. The first wind guide ring 102 is not symmetrical, and can be retracted in the front-back direction due to limited space and can be retracted when the space is not limited; the radius range of the circle of the first wind-guiding ring 102 is 0.01R-0.8R. The first stage fan blade 200 has a certain clearance with the first wind-guiding ring 102 in the area not covered by the first shroud 202, and the clearance range may be smaller.

The outlet of the second wind guiding ring 104 is in an expanding form, so that the dynamic pressure can be recovered, the efficiency is increased, and the expansion is not needed in other specific embodiments. The electric control assembly 400 affects the airflow of the fan and reduces the performance and efficiency of the fan, so the axial distance between the electric control assembly 400 and the first-stage fan blade 200 is preferably larger than 0.1R; the smaller the vertical distance between the electronic control assembly 400 and the back plate of the whole machine, the better.

The air conditioner outdoor unit 1 provided by this embodiment adopts the series design of the first stage fan blades 200 and the second stage fan blades 210, and the air flow is pressurized by the second stage fan blades 210 after being accelerated by the first stage fan blades 200, so that the air pressure is higher and the wind resistance is strong. Secondly, the counter-rotating design is adopted, the work doing capability is stronger, the rotating speed of the first-stage fan blade 200 and the second-stage fan blade 210 is obviously lower than that of a single axial flow fan, the service life is long, and the requirement on the structure can be reduced. Thirdly, the first fan blade and the second fan blade 210 have balanced torque due to the opposite rotating directions, and the vibration of the machine body is reduced. And because the design of first blade crown 202 and second blade crown 206, eliminate the blade top clearance, reduced the jam of wheel hub, increased fan efficiency, further reduced the noise.

In other embodiments, the electronic control assembly 400 can be disposed outside or partially outside the back plate.

In other embodiments, the electronic control assembly 400 may be moved down at the original position, and the heat exchanger 300 is disposed at the position of the back plate where the electronic control assembly 400 is originally disposed, so as to achieve four-side air intake.

In other embodiments, the blade roots of the first stage blades 200 and the second stage blades 210 may be provided with guide hubs.

EXAMPLE six

The third aspect of the present invention provides an air conditioner, which includes the blower or the outdoor unit 1 of the air conditioner in any of the above embodiments, and therefore, has all the advantages of the blower or the outdoor unit 1.

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.