WO2022205767A1 - Axial-flow wind wheel, axial-flow fan, and air conditioner - Google Patents

Abstract

An axial-flow wind wheel (100), an axial-flow fan (1000), and an air conditioner (10000). The axial-flow wind wheel (100) comprises a hub (1) and a plurality of blades (2). The plurality of blades (2) are arranged on the hub (1) at intervals in the circumferential direction; each blade (2) has a pressure surface (21) and a suction surface (22) which are provided opposite to each other; a blade tip (23) of the blade (2) is provided with a tail edge (3) extending towards the side of the suction surface (22); a part connecting the pressure surface (21) to the hub (1) is defined as a connecting line (4), and the thickness of the middle part of the tail edge (3) is greater than the thickness of the two ends of the tail edge (3) in an extending direction of a first end (41) of the connecting line (4) to a second end (42).

Description

Axial flow fan, axial flow fan and air conditioner

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application "Axial-Flow Fan Wheel, Axial-Flow Fan and Air Conditioner" with the application number of 202120666722.6 and the filing date of March 31, 2021, and claims the priority of the above-mentioned Chinese patent application. The entire contents of is hereby incorporated by reference into this application.

technical field

The present application relates to the technical field of air conditioning, and in particular, to an axial flow fan wheel, an axial flow fan and an air conditioner.

Background technique

In the field of air conditioning technology, an axial flow fan includes a hood, and a wind wheel is arranged in the hood. Most of the blades of the wind wheel are flat, and the flat blades cannot suppress the backflow of the air flow during the air supply process, which leads to the failure of the axial flow fan. The air supply efficiency is low and the noise is large.

SUMMARY OF THE INVENTION

Therefore, the first objective of the present application is to propose an axial flow fan wheel, which has the advantages of high air supply efficiency and low noise.

The second object of the present application is to provide an axial flow fan having the above axial flow fan wheel.

The third object of the present application is to provide an air conditioner having the above-mentioned axial flow fan.

An axial-flow wind turbine according to an embodiment of the present application includes a hub and a plurality of blades, the plurality of blades are arranged on the hub at intervals in the circumferential direction, each of the blades has a pressure surface and a suction surface arranged oppositely, and each of the blades has a pressure surface and a suction surface. The tip of each of the blades is provided with a trailing edge extending toward one side of the suction surface, and the part where the pressure surface is connected to the hub is defined as a connecting line, from the first end of the connecting line to the third In the extension direction of the two ends, the thickness of the middle part of the trailing edge is greater than the thickness of both ends of the trailing edge.

According to the axial flow rotor of the embodiment of the present application, by providing a trailing edge extending toward the suction surface side at the tip of each blade, it is convenient for the trailing edge to suppress the backflow of the airflow at the tip, and the trailing edge can suppress the airflow The effect of backflow at the blade tip is better, thereby further improving the air supply efficiency of the axial flow fan and further reducing the air supply noise. In addition, in the extending direction from the first end to the second end of the connecting line, the thickness of the middle part of the trailing edge is greater than the thickness of both ends of the trailing edge. In this way, the effect of the trailing edge to suppress the backflow of the air flow at the blade tip can be further enhanced, thereby further improving the air supply efficiency of the axial flow fan, and further reducing the air supply noise.

Optionally, in the extending direction from the first end to the second end of the connecting line, the thickness of the trailing edge first increases gradually and then decreases gradually.

Optionally, the maximum thickness of the trailing edge is at least 0.2 times the thickness of the blade tip, and not more than 2 times the thickness of the blade tip.

Optionally, the maximum thickness of the trailing edge is at least 0.5 times the thickness of the blade tip, and not more than 1 time the thickness of the blade tip.

Optionally, the diameter of the outer contour of the hub is at least 0.2 times the diameter of the outer contour of the axial flow fan wheel, and does not exceed 0.6 times the diameter of the outer contour of the axial flow fan wheel.

The axial flow fan according to the embodiment of the present application includes: an outer frame, the outer frame is provided with an air flow channel, and a fixing seat is arranged in the air flow channel, and the fixing seat is connected to the air flow channel through a connecting arm. The inner wall is connected; the motor, the motor is arranged on the fixed seat; the axial flow wind wheel, the axial flow wind wheel is the axial flow wind wheel according to the above, and the wheel hub is connected with the motor shaft of the motor to Driven to rotate by the motor.

According to the axial flow fan according to the embodiment of the present application, by providing a trailing edge extending toward the suction surface side at the tip of each blade, it is convenient for the trailing edge to suppress the backflow of the airflow at the tip, and the trailing edge can suppress the airflow at the tip. The effect of blade tip recirculation is better, thereby further improving the air supply efficiency of the axial flow fan and further reducing the air supply noise. In addition, in the extending direction from the first end to the second end of the connecting line, the thickness of the middle part of the trailing edge is greater than the thickness of both ends of the trailing edge. In this way, the effect of the trailing edge to suppress the backflow of the air flow at the blade tip can be further enhanced, thereby further improving the air supply efficiency of the axial flow fan, and further reducing the air supply noise.

Optionally, on the same projection surface, the orthographic projection surface of the hub covers the orthographic projection surface of the fixing seat, and the projection surface is a plane parallel to the cross-section of the hub.

Optionally, the fixing seat is formed in a cylindrical shape, and the outer diameter of the fixing seat is smaller than the outer diameter of the hub.

Optionally, a part of the wheel hub is covered on the fixing seat, and the wheel hub and the fixing seat cooperate to wrap the motor.

Optionally, there are a plurality of the connecting arms and are evenly spaced along the circumference of the hub.

Optionally, a plurality of the connecting arms are bent in the same direction.

Optionally, the plurality of blades are bent toward the same direction, and the bending direction of the plurality of blades is opposite to the bending direction of the plurality of connecting arms.

An air conditioner according to an embodiment of the present application includes: a casing provided with an air inlet and an air outlet; an axial flow fan, the axial flow fan being the above-mentioned axial flow fan, the axial flow fan Located within the enclosure, the axial fan rotates to introduce air from the air inlet and out from the air outlet.

According to the air conditioner of the embodiments of the present application, by providing a trailing edge extending toward the suction surface side at the tip of each blade, it is convenient for the trailing edge to suppress the backflow of the airflow at the tip of the blade, and the trailing edge can suppress the airflow at the blade tip. The effect of tip return is better, thereby further improving the air supply efficiency of the axial flow fan and further reducing the air supply noise. In addition, in the extending direction from the first end to the second end of the connecting line, the thickness of the middle portion of the trailing edge is greater than the thickness of both ends of the trailing edge. In this way, the effect of the trailing edge to suppress the backflow of the air flow at the blade tip can be further enhanced, thereby further improving the air supply efficiency of the axial flow fan, and further reducing the air supply noise.

Optionally, a refrigeration system is provided in the casing, the refrigeration system includes an evaporator and a condenser, and the axial flow fan is set corresponding to the condenser; the casing is also set corresponding to the evaporator. the first fan.

Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a schematic structural diagram of an axial flow fan according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another angle of an axial flow fan according to an embodiment of the present application;

3 is a schematic structural diagram of another angle of the axial flow fan according to an embodiment of the present application;

Fig. 4 is the partial enlarged view of A place in Fig. 3;

5 is a schematic structural diagram of another angle of the axial flow wind wheel according to an embodiment of the present application;

Fig. 6 is the structural representation according to the opposite direction of the axial flow wind wheel in Fig. 3;

7 is an exploded view of an axial flow fan according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a partial structure of an air conditioner according to an embodiment of the present application;

9 is a schematic structural diagram of an air conditioner according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another angle of the air conditioner according to the embodiment of the present application.

Reference number:

Air conditioner 10000, Axial flow fan 1000,

Axial flow fan 100,

hub 1,

Blade 2, pressure surface 21, concave surface 211, suction surface 22, convex surface 221, blade tip 23,

trailing edge 3,

Connection line 4, first end 41, second end 42,

Outer frame 200, air channel 201, fixing seat 202, connecting arm 203,

Motor 300,

The casing 2000, the air inlet 2001, the air outlet 2002, the air inlet 2003, the air outlet 2004.

Detailed ways

The following describes in detail the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application.

The following disclosure provides many different embodiments or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the application. Furthermore, this application may repeat reference numerals and/or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, this application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

The axial flow fan 100, the axial flow fan 1000, and the air conditioner 10000 according to the embodiments of the present application are described below with reference to the accompanying drawings. The air conditioner 10000 includes a casing 2000 and a heat exchange module, the heat exchange module is arranged in the casing 2000 , and the casing 2000 has an air inlet 2001 and an air outlet 2002 . The heat exchange module may include a refrigeration system and a fan assembly, for example, the fan assembly may be an axial flow fan 1000, and the refrigeration system may include a heat exchanger. When the air conditioner 10000 is working, the axial flow fan 1000 can drive the indoor air flow to enter the casing 2000 from the air inlet 2001, and flow out of the casing 2000 from the air outlet 2002, and the airflow exchanges heat with the heat exchanger in the casing 2000, thus, The airflow blown out from the air outlet 2002 is the airflow after heat exchange.

Here, the air conditioner 10000 can be a split-type air conditioner. At this time, the heat exchanger can cool or heat. When the heat exchanger cools, the heat exchange airflow is cold airflow. At this time, the airflow blown from the air outlet 2002 can cool the room. ; When the heat exchanger is heating, the heat exchange air flow is a hot air flow, and the air flow blown out from the air outlet 2002 at this time can heat up the room. For example, there may be a plurality of heat exchangers, the plurality of heat exchangers may be arranged at intervals along the height direction of the air conditioner 10000 , and the plurality of heat exchangers may also be arranged at intervals along the direction from the air inlet 2001 to the air outlet 2002 .

Here, the air conditioner 10000 can also be an integrated air conditioner. In this case, the heat exchanger can include a condenser and an evaporator. The condenser can be used for heating, and the evaporator can be used for cooling. When the evaporator is cooling, the heat exchange airflow is Cold airflow, the airflow blown from the air outlet 2002 can cool the room; when the condenser is heating, the heat exchange airflow is hot airflow, and the airflow blown from the air outlet 2002 can heat the room. For example, the condenser and the evaporator may be spaced apart along the height direction of the air conditioner 10000 , and the condenser and the evaporator may also be spaced apart in the direction from the air inlet 2001 to the air outlet 2002 .

As shown in FIGS. 1-2 , the axial-flow wind turbine 100 according to the embodiment of the present application includes a hub 1 and a plurality of blades 2 . The plurality of blades 2 are arranged on the hub 1 at intervals in the circumferential direction, and each blade 2 has a relative The pressure surface 21 and the suction surface 22 are provided, and the tip 23 of each blade 2 is provided with a trailing edge 3 extending toward one side of the suction surface 22 . With reference to FIGS. 3 to 4 , the part where the pressure surface 21 is connected to the hub 1 is defined as the connecting line 4 . In the extending direction from the first end 41 to the second end 42 of the connecting line 4 , the thickness of the middle part of the trailing edge 3 is greater than The thickness of both ends of the trailing edge 3 .

Here, the pressure surface 21 can be understood as the working surface of the blade 2, that is, the concave surface 211 shown in FIG. 1. After the airflow enters the axial flow wind wheel 100, the pressure surface 21 mainly pushes the airflow forward; the suction surface 22 can be understood as the blade 2, that is, the convex surface 221 shown in FIG. 1, the pressure of the airflow on the pressure surface 21 is greater than the pressure of the airflow on the suction surface 22. It can be understood that the blades 2 can be used to drive the airflow entering the axial-flow rotor 100 to flow in the axial direction of the axial-flow rotor 100 , so that the airflow outside the axial-flow rotor 100 can be facilitated to continuously enter the axial-flow rotor 100 , so that the axial flow fan wheel 100 can realize the driving air flow from one position to another position.

For example, the axial fan 100 can drive the airflow to flow from the air inlet 2001 of the casing 2000 to the air outlet 2002. During the process of the airflow flowing from the air inlet 2001 to the air outlet 2002, the airflow exchanges heat with the heat exchanger, and the axial fan 100 drives the heat-exchanged airflow to flow out of the air outlet 2002, so that the air conditioner 10000 can achieve the function of cooling or heating. Of course, the axial fan 100 can also be used for ventilation in general factories, warehouses, offices, residences and other places, and can also be used for air coolers (air coolers), evaporators, condensers, spray drops, etc. .

Here, the plurality of blades 2 can drive more airflow to flow in the axial direction of the axial-flow rotor 100 , so that more airflow outside the axial-flow rotor 100 can enter the axial-flow rotor 100 , so that the axial airflow The wheel 100 can be implemented to drive more airflow from one location to another. When the axial flow fan 100 is used in the air conditioner 10000, the air intake volume and the air output volume of the air conditioner 10000 can be increased. Wherein, the trailing edge 3 can be used to inhibit the backflow of the air flow at the blade tip 23 , thereby improving the air supply efficiency of the axial-flow wind wheel 100 and reducing the air supply noise. The tip 23 of each blade 2 is provided with a trailing edge 3 extending toward one side of the suction surface 22 , which can facilitate the trailing edge 3 to suppress the backflow of the airflow at the tip 23 , and enable the trailing edge 3 to inhibit the backflow of the airflow at the tip 23 . The effect is better, thereby further improving the air supply efficiency of the axial flow fan wheel 100 and further reducing the air supply noise.

In addition, in the extending direction from the first end 41 to the second end 42 of the connecting wire 4 , the thickness of the middle portion of the trailing edge 3 is greater than the thickness of both ends of the trailing edge 3 . Specifically, as shown in FIG. 4 , the thickness of the middle portion of the trailing edge 3 may be H, and the thickness of both ends of the trailing edge 3 may be h, and the value of H is greater than the value of h. In this way, the effect of the trailing edge 3 to suppress the backflow of the air flow at the blade tip 23 can be further enhanced, thereby further improving the air supply efficiency of the axial fan wheel 100 and further reducing the air supply noise.

In the related art, the axial flow fan includes a hood, and a wind wheel is arranged in the hood. Most of the blades of the wind wheel are flat, and the flat blades cannot suppress the backflow of the air flow during the air supply process, resulting in the air supply of the axial flow fan. Low efficiency and high noise.

However, according to the axial flow fan 100 of the embodiment of the present application, by providing the trailing edge 3 extending toward the suction surface 22 at the tip 23 of each blade 2 , it is convenient for the trailing edge 3 to suppress the airflow at the blade tip 23 . backflow, and the effect of the trailing edge 3 in inhibiting the backflow of the air flow at the blade tip 23 is better, so as to further improve the air supply efficiency of the axial flow fan 100 and further reduce the air supply noise. In addition, in the extending direction from the first end 41 to the second end 42 of the connecting wire 4 , the thickness of the middle portion of the trailing edge 3 is greater than the thickness of both ends of the trailing edge 3 . In this way, the effect of the trailing edge 3 to suppress the backflow of the air flow at the blade tip 23 can be further enhanced, thereby further improving the air supply efficiency of the axial fan wheel 100 and further reducing the air supply noise.

In some embodiments of the present application, as shown in FIG. 4 , in the extending direction from the first end 41 to the second end 42 of the connecting wire 4, the thickness of the trailing edge 3 first increases gradually and then decreases gradually. As an achievable way, in the extending direction from the first end 41 to the second end 42 of the connecting line 4, one end of the trailing edge 3 and the middle of the trailing edge 3 can be smoothly connected, and the other end of the trailing edge 3 is connected to the middle of the trailing edge 3. The middle portion of the trailing edge 3 can also be smoothly transitioned, and thus, in the radial direction of the wheel hub 1 , one side of the trailing edge 3 can be in an arc shape as a whole. Thus, the trailing edge 3 can be set so that the thickness of the middle portion of the trailing edge 3 is greater than the thickness of both ends of the trailing edge 3 . Furthermore, the effect of the trailing edge 3 to suppress the backflow of the air flow at the blade tip 23 can be further enhanced, thereby further improving the air supply efficiency of the axial flow fan wheel 100 and further reducing the air supply noise.

According to some embodiments of the present application, as shown in FIG. 5 , the maximum thickness of the trailing edge 3 is at least 0.2 times the thickness of the blade tip 23 and not more than 2 times the thickness of the blade tip 23 . Specifically, the thickness of the blade tip 23 may be A0, and the maximum thickness of the trailing edge 3 may be A1, where A1/A0=0.2˜2.0. It should be explained here that when the thickness of the blade 2 is equal thickness, the thickness A0 of the blade tip 23 is the equal thickness thickness of the blade 2; when the thickness of the blade 2 is unequal thickness, the thickness A0 of the blade tip 23 is the thickness A0 of the blade 2 maximum thickness. The maximum thickness of the trailing edge 3 may be the thickness of the middle of the trailing edge 3 . Where A1/A0=0.2-2.0, the trailing edge 3 has a better effect of suppressing the backflow of the air flow at the blade tip 23, thereby further improving the air supply efficiency of the axial flow fan 100 and further reducing the air supply noise.

Optionally, the maximum thickness of the trailing edge 3 is at least 0.5 times the thickness of the blade tip 23 and not more than 1 time the thickness of the blade tip 23 . Specifically, A1/A0=0.5 to 1.0.

As shown in FIG. 6 , in some embodiments of the present application, the diameter of the outer contour of the hub 1 is at least 0.2 times the diameter of the outer contour of the axial flow fan wheel 100 , and does not exceed the diameter of the outer contour of the axial flow fan wheel 100 0.6 times. Specifically, the diameter of the outer contour of the axial fan 100 is D1, and the diameter of the outer contour of the hub 1 is D0, where D0/D1=0.2-0.6. It should be noted that when D0/D1=0.2-0.6, the air volume entering the axial flow wind wheel 100 can be guaranteed, so that the blades 2 can drive a sufficient amount of air flow, so that more air flow can enter the axial flow wind wheel 100 , so that the air supply effect of the axial flow fan wheel 100 is better.

The axial flow fan 100 according to the embodiment of the present application will be described in detail below with reference to FIGS. 1 to 6 . It should be understood that the following descriptions are merely exemplary illustrations rather than specific limitations of the present application.

As shown in FIGS. 1-2 , the axial-flow wind turbine 100 includes a hub 1 and a plurality of blades 2 . The plurality of blades 2 are arranged on the hub 1 at intervals in the circumferential direction, and each blade 2 has a pressure surface 21 and a suction force arranged oppositely. face 22 , the tip 23 of each blade 2 is provided with a trailing edge 3 extending towards one side of the suction face 22 . With reference to FIGS. 3 to 4 , the part where the pressure surface 21 is connected to the hub 1 is defined as the connecting line 4 . In the extending direction from the first end 41 to the second end 42 of the connecting line 4 , the thickness of the middle part of the trailing edge 3 is greater than The thickness of both ends of the trailing edge 3 .

Here, the pressure surface 21 can be understood as the working surface of the blade 2, that is, the concave surface 211 shown in FIG. 1. After the airflow enters the axial flow wind wheel 100, the pressure surface 21 mainly pushes the airflow forward; the suction surface 22 can be understood as the blade 2, that is, the convex surface 221 shown in FIG. 1, the pressure of the airflow on the pressure surface 21 is greater than the pressure of the airflow on the suction surface 22. It can be understood that the blades 2 can be used to drive the airflow entering the axial-flow rotor 100 to flow in the axial direction of the axial-flow rotor 100 , thereby facilitating the airflow outside the axial-flow rotor 100 to enter the axial-flow rotor 100 , Therefore, the axial flow fan 100 can realize the driving air flow from one position to another position.

For example, the axial fan 100 can drive the airflow to flow from the air inlet 2001 of the casing 2000 to the air outlet 2002. During the process of the airflow flowing from the air inlet 2001 to the air outlet 2002, the airflow exchanges heat with the heat exchanger, and the axial fan 100 drives the heat-exchanged airflow to flow out of the air outlet 2002, so that the air conditioner 10000 can achieve the function of cooling or heating. Of course, the axial fan 100 can also be used for ventilation in general factories, warehouses, offices, residences and other places, and can also be used for air coolers (air coolers), evaporators, condensers, spray drops, etc. .

Here, the plurality of blades 2 can drive more airflow to flow in the axial direction of the axial-flow rotor 100 , so that more airflow outside the axial-flow rotor 100 can enter the axial-flow rotor 100 , so that the axial airflow The wheel 100 can be implemented to drive more airflow from one location to another. When the axial flow fan 100 is used in the air conditioner 10000, the air intake volume and the air output volume of the air conditioner 10000 can be increased. Wherein, the trailing edge 3 can be used to inhibit the backflow of the air flow at the blade tip 23 , thereby improving the air supply efficiency of the axial-flow wind wheel 100 and reducing the air supply noise. The tip 23 of each blade 2 is provided with a trailing edge 3 extending toward one side of the suction surface 22 , which can facilitate the trailing edge 3 to suppress the backflow of the airflow at the tip 23 , and enable the trailing edge 3 to inhibit the backflow of the airflow at the tip 23 . The effect is better, thereby further improving the air supply efficiency of the axial flow fan wheel 100 and further reducing the air supply noise.

In addition, in the extending direction from the first end 41 to the second end 42 of the connecting wire 4 , the thickness of the middle portion of the trailing edge 3 is greater than the thickness of both ends of the trailing edge 3 . Specifically, as shown in FIG. 4 , the thickness of the middle portion of the trailing edge 3 may be H, and the thickness of both ends of the trailing edge 3 may be h, and the value of H is greater than the value of h. In this way, the effect of the trailing edge 3 to suppress the backflow of the air flow at the blade tip 23 can be further enhanced, thereby further improving the air supply efficiency of the axial fan wheel 100 and further reducing the air supply noise.

As shown in FIG. 4 , in the extending direction from the first end 41 to the second end 42 of the connecting wire 4 , the thickness of the trailing edge 3 first increases gradually and then decreases gradually. As an achievable way, in the extending direction from the first end 41 to the second end 42 of the connecting line 4, one end of the trailing edge 3 and the middle of the trailing edge 3 can be smoothly connected, and the other end of the trailing edge 3 is connected to the middle of the trailing edge 3. The middle portion of the trailing edge 3 can also be smoothly transitioned, and thus, in the radial direction of the wheel hub 1 , one side of the trailing edge 3 can be in an arc shape as a whole. Thus, the trailing edge 3 can be set so that the thickness of the middle portion of the trailing edge 3 is greater than the thickness of both ends of the trailing edge 3 . Furthermore, the effect of the trailing edge 3 to suppress the backflow of the air flow at the blade tip 23 can be further enhanced, thereby further improving the air supply efficiency of the axial flow fan wheel 100 and further reducing the air supply noise.

As shown in FIG. 5 , the maximum thickness of the trailing edge 3 is at least 0.2 times the thickness of the blade tip 23 and not more than 2 times the thickness of the blade tip 23 . Specifically, the thickness of the blade tip 23 may be A0, and the maximum thickness of the trailing edge 3 may be A1, where A1/A0=0.2˜2.0. It should be explained here that when the thickness of the blade 2 is equal thickness, the thickness A0 of the blade tip 23 is the equal thickness thickness of the blade 2; when the thickness of the blade 2 is unequal thickness, the thickness A0 of the blade tip 23 is the thickness A0 of the blade 2 maximum thickness. The maximum thickness of the trailing edge 3 may be the thickness of the middle of the trailing edge 3 . Where A1/A0=0.2-2.0, the trailing edge 3 has a better effect of suppressing the backflow of the air flow at the blade tip 23, thereby further improving the air supply efficiency of the axial flow fan 100 and further reducing the air supply noise.

Further, the maximum thickness of the trailing edge 3 is at least 0.5 times the thickness of the blade tip 23 and not more than 1 time the thickness of the blade tip 23 . Specifically, A1/A0=0.5 to 1.0.

As shown in FIG. 6 , the diameter of the outer contour of the hub 1 is at least 0.2 times the diameter of the outer contour of the axial flow fan wheel 100 , and does not exceed 0.6 times the diameter of the outer contour of the axial flow fan wheel 100 . Specifically, the diameter of the outer contour of the axial fan 100 is D1, and the diameter of the outer contour of the hub 1 is D0, where D0/D1=0.2-0.6. It should be noted that when D0/D1=0.2-0.6, the air volume entering the axial flow wind wheel 100 can be guaranteed, so that the blades 2 can drive a sufficient amount of air flow, so that more air flow can enter the axial flow wind wheel 100 , so that the air supply effect of the axial flow fan wheel 100 is better.

As shown in FIG. 7 , an axial flow fan 1000 according to an embodiment of the present application includes an outer frame 200 , a motor 300 and an axial flow fan wheel 100 . The outer frame 200 is provided with an air flow channel 201 , and a fixed seat is arranged in the air flow channel 201 202, the fixed seat 202 is connected with the inner wall of the air flow channel 201 through the connecting arm 203; the motor 300 is arranged on the fixed seat 202; The motor shaft is connected to be driven to rotate by the motor 300 .

It can be understood that the motor 300 can drive the hub 1 to rotate. Since the plurality of blades 2 are arranged on the hub 1 at intervals along the circumferential direction of the hub 1, the motor 300 can drive the plurality of blades 2 to rotate, and the plurality of blades 2 can rotate. The driving air flows out from one end of the air flow channel 201 , and more air flows in from the other end of the air flow channel 201 , thereby realizing the air supply function of the axial flow fan 1000 . Wherein, the outer frame 200 may facilitate the setting of the air flow channel 201, on the one hand. The air flow channel 201 can facilitate the storage of airflow; on the other hand, the air flow channel 201 can also facilitate the setting of a fixing seat 202 , and the fixing seat 202 can be used to support the motor 300 so that the motor 300 can work reliably. The connecting arm 203 can facilitate fixing the fixing seat 202 in the air channel 201 .

For example, the axial flow fan 1000 can be used for ventilation in general factories, warehouses, offices, residences, etc., and can also be used for air coolers (air coolers), evaporators, condensers, spray drops, etc., and there are also Mine axial flow fan 1000, anti-corrosion and explosion-proof axial flow fan 1000 adopts anti-corrosion materials and explosion-proof measures, and is matched with explosion-proof motor 300, which can be used to transport explosive, volatile and corrosive gases. Of course, the axial flow fan 1000 can also be used in the split type air conditioner 10000 and the integrated type air conditioner 10000 .

According to the axial flow fan 1000 of the embodiment of the present application, by providing the trailing edge 3 extending toward the side of the suction surface 22 at the tip 23 of each blade 2 , it is convenient for the trailing edge 3 to suppress the backflow of the airflow at the tip 23 , In addition, the effect of the trailing edge 3 in inhibiting the backflow of the air flow at the blade tip 23 is better, thereby further improving the air supply efficiency of the axial flow wind wheel 100 and further reducing the air supply noise. In addition, in the extending direction from the first end 41 to the second end 42 of the connecting wire 4 , the thickness of the middle portion of the trailing edge 3 is greater than the thickness of both ends of the trailing edge 3 . In this way, the effect of the trailing edge 3 to suppress the backflow of the air flow at the blade tip 23 can be further enhanced, thereby further improving the air supply efficiency of the axial fan wheel 100 and further reducing the air supply noise.

In some embodiments of the present application, referring to FIG. 7 , on the same projection plane, the orthographic projection surface of the wheel hub 1 covers the orthographic projection surface of the fixed seat 202 , and the projection surface is a plane parallel to the cross-section of the wheel hub 1 . Here, the cross section can be understood as a plane perpendicular to the axis of the hub 1, and the following cross sections are all interpreted in this way. Therefore, in the axial direction of the axial flow fan 1000, that is, in the flow direction of the air flow, the fixed seat 202 will not block the blades 2, thereby reducing the wind resistance of the air flow. On the one hand, energy can be saved; , the air supply volume of the axial flow fan 1000 can be increased, so that the air supply effect of the axial flow fan 1000 is better.

According to some embodiments of the present application, as shown in FIG. 7 , the fixing seat 202 may be formed in a cylindrical shape, and the outer diameter of the fixing seat 202 is smaller than the outer diameter of the wheel hub 1 . In this way, it can be achieved that the orthographic projection surface of the wheel hub 1 covers the orthographic projection surface of the fixing seat 202 , and the projection surface is a plane parallel to the cross-section of the wheel hub 1 . Furthermore, in the axial direction of the axial flow fan 1000, that is, in the flow direction of the air flow, the fixed seat 202 will not block the blades 2, so that the wind resistance of the air flow can be reduced. On the one hand, energy can be saved; on the other hand, The air supply volume of the axial flow fan 1000 can be increased, so that the air supply effect of the axial flow fan 1000 is better.

In some embodiments of the present application, a part of the wheel hub 1 is covered on the fixing base 202 , and the wheel hub 1 and the fixing base 202 cooperate to wrap the motor 300 . In this way, the orthographic projection surface of the hub 1 can cover the orthographic projection surface of the fixing seat 202 , and the projection surface is a plane parallel to the cross-section of the hub 1 . The hub 1 and the fixed seat 202 can also protect the motor 300 so that dust and the like will not corrode the motor 300 , thereby prolonging the service life of the motor 300 .

According to some embodiments of the present application, as shown in FIG. 7 , there are multiple connecting arms 203 and are evenly spaced along the circumferential direction of the wheel hub 1 . It can be understood that one end of each connecting arm 203 can be connected to the fixing base 202, and the other end of the connecting arm 203 can be connected to the outer frame 202. A plurality of connecting arms 203 are arranged at intervals around the circumference of the fixing base 202. The connecting arms 203 can strengthen the connection strength between the fixing base 202 and the outer frame 200 , and the plurality of connecting arms 203 evenly spaced can also guide the air flow to the air channel 201 , so that the air intake of the air channel 201 is smoother.

As shown in FIG. 7 , in some embodiments of the present application, the plurality of connecting arms 203 are bent toward the same direction. Therefore, the airflow can be better guided to the air flow channel 201 , so that the air intake of the air flow channel 201 is smoother.

Further, referring to FIG. 7 , the plurality of blades 2 are bent in the same direction, and the bending direction of the plurality of blades 2 is opposite to the bending direction of the plurality of connecting arms 203 . Therefore, after the air flow enters the air flow channel 201, it is easy to be squeezed by the plurality of blades 2 and the plurality of connecting arms 203, thereby increasing the pressure in the air flow channel 201, so that the speed of the airflow discharged from the air flow channel 201 increases. Therefore, the air outlet speed of the axial flow fan 1000 of the present application is relatively large.

The axial flow fan 1000 according to the embodiment of the present application will be described in detail below with reference to FIG. 7 . It should be understood that the following descriptions are merely exemplary illustrations rather than specific limitations of the present application.

As shown in FIG. 7 , the axial flow fan 1000 includes an outer frame 200, a motor 300 and an axial flow fan 100. The outer frame 200 is provided with an air flow channel 201, and the air flow channel 201 is provided with a fixing seat 202. The fixing seat 202 is connected by The arm 203 is connected to the inner wall of the air flow channel 201; the motor 300 is arranged on the fixed seat 202; Drive turns.

It can be understood that the motor 300 can drive the hub 1 to rotate. Since the plurality of blades 2 are arranged on the hub 1 at intervals along the circumferential direction of the hub 1, the motor 300 can drive the plurality of blades 2 to rotate, and the plurality of blades 2 can rotate. The driving air flows out from one end of the air flow channel 201 , and more air flows in from the other end of the air flow channel 201 , thereby realizing the air supply function of the axial flow fan 1000 . Wherein, the outer frame 200 may facilitate the setting of the air flow channel 201, on the one hand. The air flow channel 201 can facilitate the storage of airflow; on the other hand, the air flow channel 201 can also facilitate the setting of a fixing seat 202 , and the fixing seat 202 can be used to support the motor 300 so that the motor 300 can work reliably. The connecting arm 203 can facilitate fixing the fixing seat 202 in the air channel 201 .

For example, the axial flow fan 1000 can be used for ventilation in general factories, warehouses, offices, residences, etc., and can also be used for air coolers (air coolers), evaporators, condensers, spray drops, etc., and there are also Mine axial flow fan 1000, anti-corrosion and explosion-proof axial flow fan 1000 adopts anti-corrosion materials and explosion-proof measures, and is matched with explosion-proof motor 300, which can be used to transport explosive, volatile and corrosive gases. Of course, the axial flow fan 1000 can also be used in the split type air conditioner 10000 and the integrated type air conditioner 10000 .

Referring to FIG. 7 , on the same projection surface, the orthographic projection surface of the hub 1 covers the orthographic projection surface of the fixing seat 202 , and the projection surface is a plane parallel to the cross-section of the hub 1 . Therefore, in the axial direction of the axial flow fan 1000, that is, in the flow direction of the air flow, the fixed seat 202 will not block the blades 2, thereby reducing the wind resistance of the air flow. On the one hand, energy can be saved; , the air supply volume of the axial flow fan 1000 can be increased, so that the air supply effect of the axial flow fan 1000 is better.

As shown in FIG. 7 , the fixing seat 202 may be formed in a cylindrical shape, and the outer diameter of the fixing seat 202 is smaller than the outer diameter of the wheel hub 1 . In this way, it can be achieved that the orthographic projection surface of the wheel hub 1 covers the orthographic projection surface of the fixing seat 202 , and the projection surface is a plane parallel to the cross-section of the wheel hub 1 . Furthermore, in the axial direction of the axial flow fan 1000, that is, in the flow direction of the air flow, the fixed seat 202 will not block the blades 2, so that the wind resistance of the air flow can be reduced. On the one hand, energy can be saved; on the other hand, The air supply volume of the axial flow fan 1000 can be increased, so that the air supply effect of the axial flow fan 1000 is better.

A part of the wheel hub 1 is covered on the fixing seat 202 , and the wheel hub 1 and the fixing seat 202 cooperate to wrap the motor 300 . In this way, the orthographic projection surface of the hub 1 can cover the orthographic projection surface of the fixing seat 202 , and the projection surface is a plane parallel to the cross-section of the hub 1 . The hub 1 and the fixed seat 202 can also protect the motor 300 so that dust and the like will not corrode the motor 300 , thereby prolonging the service life of the motor 300 .

As shown in FIG. 7 , there are a plurality of connecting arms 203 and are evenly spaced along the circumferential direction of the hub 1 . The plurality of connecting arms 203 can strengthen the connection strength between the fixing base 202 and the outer frame 200 , and the plurality of connecting arms 203 evenly spaced can also guide the air flow to the air channel 201 , so that the air intake of the air channel 201 is smoother. As shown in FIG. 7 , the plurality of connecting arms 203 are bent in the same direction. Therefore, the airflow can be better guided to the air flow channel 201 , so that the air intake of the air flow channel 201 is smoother.

As shown in FIGS. 8-10 , an air conditioner 10000 according to an embodiment of the present application includes a casing 2000 and an axial flow fan 1000. The casing 2000 is provided with an air inlet 2001 and an air outlet 2002; the axial flow fan 1000 is based on the above The axial flow fan 1000 described above, the axial flow fan 1000 is arranged in the casing 2000 , and the axial flow fan 1000 rotates to introduce air from the air inlet 2001 and export it from the air outlet 2002 .

According to the air conditioner 10000 of the embodiment of the present application, by providing the trailing edge 3 extending toward the suction surface 22 at the tip 23 of each blade 2 , the trailing edge 3 can be facilitated to suppress the backflow of the airflow at the tip 23 , and The effect of the trailing edge 3 in suppressing the backflow of the air flow at the blade tip 23 is better, thereby further improving the air supply efficiency of the axial-flow wind wheel 100 and further reducing the air supply noise. In addition, in the extending direction from the first end 41 to the second end 42 of the connecting wire 4 , the thickness of the middle portion of the trailing edge 3 is greater than the thickness of both ends of the trailing edge 3 . In this way, the effect of the trailing edge 3 to suppress the backflow of the air flow at the blade tip 23 can be further enhanced, thereby further improving the air supply efficiency of the axial fan wheel 100 and further reducing the air supply noise.

According to some embodiments of the present application, the casing 2000 is provided with a refrigeration system, the refrigeration system includes an evaporator and a condenser, the axial fan 1000 is set corresponding to the condenser; the casing 2000 is also set with a first fan corresponding to the evaporator. Among them, the condenser can be used for heating, and the evaporator can be used for cooling. When the evaporator is cooling, the first fan can drive the airflow from the air inlet 2003 to enter the casing 2000, and the airflow exchanges heat with the evaporator. The airflow is cold airflow, and the airflow blown out from the air outlet 2004 can cool the room; when the condenser is heating, the axial flow fan 1000 can drive the airflow from the air inlet 2001 to enter the casing 2000, and the airflow exchanges heat with the condenser. The hot air is hot air, and the air blown out from the air outlet 2002 can heat up the room. Here, the air outlet 2002 and the air outlet 2004 can be one, and of course, the air inlet 2001 and the air inlet 2003 can also be one.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction between the two elements. . For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims (14)

1. An axial flow fan, comprising:

   hub;

   a plurality of blades, the plurality of blades are arranged on the hub at intervals along the circumferential direction, each of the blades has a pressure surface and a suction surface arranged oppositely, and the tip of each of the blades is provided with a suction surface facing the a trailing edge extending from one side of the greater than the thickness of both ends of the trailing edge.
2. The axial flow fan according to claim 1, wherein, in the extending direction from the first end to the second end of the connecting line, the thickness of the trailing edge first increases gradually and then decreases gradually.
3. The axial flow rotor according to claim 1 or 2, wherein the maximum thickness of the trailing edge is at least 0.2 times the thickness of the blade tip, and not more than 2 times the thickness of the blade tip.
4. The axial flow rotor according to any one of claims 1-3, wherein the maximum thickness of the trailing edge is at least 0.5 times the thickness of the blade tip, and not more than 1 times the thickness of the blade tip times.
5. The axial flow fan according to any one of claims 1-4, wherein the diameter of the outer contour of the hub is at least 0.2 times the diameter of the outer contour of the axial flow fan, and does not exceed the diameter of the shaft 0.6 times the diameter of the outer contour of the flow fan.
6. An axial flow fan, comprising:

   an outer frame, the outer frame is provided with an air flow channel, a fixing seat is arranged in the air flow channel, and the fixing seat is connected with the inner wall of the air flow channel through a connecting arm;

   a motor, the motor is arranged on the fixing seat;

   An axial-flow wind wheel, the axial-flow wind wheel is the axial-flow wind wheel according to any one of claims 1-5, and the wheel hub is connected to a motor shaft of the motor to be driven and rotated by the motor.
7. The axial flow fan according to claim 6, wherein, on the same projection plane, the orthographic projection surface of the hub covers the orthographic projection surface of the fixed seat, and the projection surface is parallel to the cross-section of the hub. flat.
8. The axial flow fan according to claim 6 or 7, wherein the fixing seat is formed in a cylindrical shape, and the outer diameter of the fixing seat is smaller than the outer diameter of the hub.
9. The axial flow fan according to any one of claims 6-8, wherein a part of the wheel hub is sheathed on the fixing seat, and the wheel hub and the fixing seat cooperate to wrap the motor.
10. The axial flow fan according to any one of claims 6-9, wherein the connecting arms are plural and are evenly spaced along the circumferential direction of the hub.
11. The axial flow fan according to any one of claims 6-10, wherein a plurality of the connecting arms are bent toward the same direction.
12. The axial flow fan according to any one of claims 6-11, wherein the plurality of blades are bent in the same direction, and the bending direction of the plurality of blades is opposite to the bending direction of the plurality of connecting arms.
13. An air conditioner comprising:

    a casing, the casing is provided with an air inlet and an air outlet;

    Axial flow fan, the axial flow fan is the axial flow fan according to any one of claims 6-12, the axial flow fan is arranged in the casing, and the axial flow fan rotates to blow air from The air inlet leads in and leads out from the air outlet.
14. The air conditioner according to claim 13, wherein a refrigeration system is arranged in the casing, the refrigeration system comprises an evaporator and a condenser, and the axial flow fan is arranged corresponding to the condenser;

    A first fan corresponding to the evaporator is also arranged in the casing.

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