Axial flow wind wheel, axial flow fan, air conditioner outdoor unit and air conditioner

Abstract

The invention discloses an axial flow wind wheel, an axial flow fan, an air conditioner outdoor unit and an air conditioner. The first blades are connected with the hub and extend outwards in the radial direction of the hub, the number of the first blades is multiple, and the multiple first blades are arranged in the circumferential direction of the hub at intervals; the second blades are connected with the hub and extend outwards in the radial direction of the hub, the second blades and the first blades are arranged in a layered mode in the axial direction of the hub, in the radial direction of the hub, the distance between the outer end edge of the first blade and the central axis of the hub is a first distance, and in the radial direction of the hub, the distance between the outer end edge of the second blade and the central axis of the hub is a second distance. The distance between the outer end edge of the second blade and the central axis of the hub is a second distance, and the first distance is larger than the second distance. According to the axial flow wind wheel, through the first blades and the second blades which are arranged in the axial direction of the hub in the layered mode, the working capacity of the axial flow wind wheel can be remarkably improved, the gas pressure of the axial flow wind wheel is increased, and the air volume and the air supply efficiency of the axial flow wind wheel are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to an axial flow fan, an axial flow fan, an air conditioning outdoor unit and an air conditioner. Background Art

[0002] Existing indoor units, especially cabinet units, generally use centrifugal fans or cross-flow fans as air supply mechanisms. However, with the continuous in-depth design of air conditioning performance and structure and the gradual improvement of product quality requirements, axial flow fans have entered the field of vision of R&D personnel with their advantages of high efficiency and large air volume. However, compared with centrifugal fans, the static pressure of axial flow impellers is lower, and thus cannot meet specific wind pressure requirements. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to propose an axial flow wind wheel, which can significantly improve the working capacity of the axial flow wind wheel, increase the gas pressure of the axial flow fan, and improve the air volume and air supply efficiency of the axial flow fan.

[0004] The present invention also provides an axial flow fan having the above axial flow wind wheel.

[0005] The present invention also provides an air-conditioning outdoor unit having the above-mentioned axial flow fan.

[0006] The present invention also provides an air conditioner having the axial flow fan.

[0007] According to the first aspect of the present invention, the axial flow wind wheel includes: a hub; a first blade, the first blade is connected to the hub and extends radially outward from the hub, the number of the first blades is multiple, and the multiple first blades are arranged at intervals along the circumference of the hub; a second blade, the second blade is connected to the hub and extends radially outward from the hub, the second blade and the first blade are layered in the axial direction of the hub, wherein, in the radial direction of the hub, the outer end of the first blade is spaced from the center axis of the hub by a first spacing, the outer end of the second blade is spaced from the center axis of the hub by a second spacing, and the first spacing is greater than the second spacing.

[0008] According to the axial flow wind wheel of the present invention, the working capacity of the axial flow wind wheel can be significantly improved and the gas pressure of the axial flow fan can be increased by layering the first blades and the second blades in the axial direction of the hub; at the same time, the air volume and air supply efficiency of the axial flow fan can also be effectively improved.

[0009] According to some embodiments of the present invention, the first interval d1 and the second interval d2 further satisfy: 0.3≤d2 / d1≤0.85.

[0010] According to some embodiments of the present invention, the second blades and the first blades are staggered in the circumferential direction of the hub.

[0011] According to some embodiments of the present invention, the second blade is located on an upstream side of the first blade along a flow direction of the airflow.

[0012] According to some embodiments of the present invention, in a direction from one end of the hub in the axial direction toward the other end, one end of the first blade connected to the hub extends obliquely along the circumference of the hub, and one end of the second blade connected to the hub extends obliquely along the circumference of the hub, and the inclination direction of the one end of the first blade is the same as the inclination direction of the one end of the second blade.

[0013] According to some embodiments of the present invention, in the axial direction of the hub, the side edge of the first blade facing the second blade is the first edge, the side edge of the second blade facing the first blade is the second edge, and the first edge and the second edge have a gap in the axial direction of the hub.

[0014] According to some embodiments of the present invention, in a radial direction from inside to outside of the hub, the inner end of the first blade is fixed to the hub, and the outer end of the first blade is bent radially outward along the hub and toward the direction where the second blade is located.

[0015] According to some embodiments of the present invention, in the axial direction of the hub, an end edge of an outer end of the first blade facing the second blade exceeds a side edge of the second blade facing away from the first blade.

[0016] According to some embodiments of the present invention, there are multiple second blades, and the multiple second blades correspond one-to-one to the multiple first blades.

[0017] An axial flow fan according to a second aspect of the present invention comprises the axial flow wind wheel according to the first aspect of the present invention.

[0018] According to the axial flow fan of the present invention, the overall performance of the axial flow fan is improved by providing the axial flow wind wheel of the first aspect.

[0019] An air-conditioning outdoor unit according to a third aspect of the present invention comprises the axial flow fan according to the second aspect of the present invention.

[0020] According to the air-conditioning outdoor unit of the present invention, the overall performance of the air-conditioning outdoor unit is improved by providing the axial flow fan of the second aspect.

[0021] An air conditioner according to a fourth aspect of the present invention comprises the axial flow fan according to the second aspect of the present invention.

[0022] According to the air conditioner of the present invention, the overall performance of the air conditioner is improved by providing the axial flow fan of the second aspect.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of an outdoor unit of an air conditioner according to an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 A schematic diagram of an axial flow wind wheel shown in FIG.

[0026] Figure 3 yes Figure 1 Schematic diagram of the structural arrangement of the axial flow wind wheel along the radial direction of the hub shown in;

[0027] Figure 4 yes Figure 1 A schematic diagram of the axial flow wind wheel at another angle shown in FIG.

[0028] Figure 5 yes Figure 1 A schematic diagram of the axial flow wind wheel shown in another angle;

[0029] Figure 6 yes Figure 1 Schematic diagram of flow field simulation of the axial flow wind wheel shown in .

[0030] Reference numerals:

[0031] 100. Air conditioner outdoor unit;

[0032] 10. Axial flow fan;

[0033] 1. Axial flow wind wheel; 11. Hub; 12. First blade; 121. First edge; 13. Second blade; 131. Second edge; 14. Suction surface; 15. Pressure surface;

[0034] 2. Motor;

[0035] 20. Shell;

[0036] 30. Heat exchanger;

[0037] 40. Motor bracket. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] Reference below Figure 1-Figure 6 An axial flow wind wheel 1 according to an embodiment of a first aspect of the present invention is described.

[0040] like Figure 2-Figure 3 As shown, the axial flow wind wheel 1 according to the first embodiment of the present invention includes: a hub 11, a first blade 12 and a second blade 13, the first blade 12 is connected to the hub 11 and extends radially outwardly of the hub 11, the number of the first blades 12 is multiple, and the multiple first blades 12 are arranged at intervals along the circumference of the hub 11; the second blade 13 is connected to the hub 11 and extends radially outwardly of the hub 11, the second blade 13 and the first blade 12 are layered in the axial direction of the hub 11, wherein, in the radial direction of the hub 11, the outer end of the first blade 12 is spaced apart from the central axis of the hub 11 by a first spacing, the outer end of the second blade 13 is spaced apart from the central axis of the hub 11 by a second spacing, and the first spacing is greater than the second spacing.

[0041] Specifically, the hub 11 is a part connecting the blades and the output shaft, and is used to connect the blades and the output shaft. The first blade 12 and the second blade 13 are driven by the motor 2 to rotate to drive the air flow. The second blade 13 and the first blade 12 are arranged in layers in the axial direction of the hub 11, that is, one of the first blade 12 and the second blade 13 is close to the air inlet side, and the other is close to the air outlet side. In this way, when the axial flow fan 1 is working, the airflow can first pass through one of the first blade 12 or the second blade 13 to do work, and then pass through the other to do work. In this way, the airflow can be secondary pressurized, thereby increasing the gas pressure of the axial flow fan 10.

[0042] In the radial direction of the hub 11, the first spacing is greater than the second spacing, that is, the radial size of the first blade 12 is greater than the radial size of the second blade 13. In this way, when the second blade 13 is close to the air inlet side, the airflow after being pressurized by the second blade 13 can completely cover the main working surface of the first blade 12, thereby improving the air supply and efficiency of the axial flow wind wheel 1; when the first blade 12 is close to the air inlet side, the second blade 13 can perform secondary pressurization on the gas pressurized by the first blade 12, thereby increasing the gas pressure of the axial flow fan 10.

[0043] According to the axial flow wind wheel 1 of the embodiment of the present invention, the working capacity of the axial flow wind wheel 1 can be significantly improved and the gas pressure of the axial flow fan 10 can be increased by layering the first blades 12 and the second blades 13 in the axial direction of the hub 11; at the same time, the air volume and air supply efficiency of the axial flow fan 10 can also be effectively improved.

[0044] According to some embodiments of the present invention, Figure 3 As shown, the first spacing d1 and the second spacing d2 further satisfy: 0.3≤d2 / d1≤0.85. In this way, when the first blade 12 is close to the air inlet side, the second blade 13 can perform secondary supercharging on the gas pressurized by the first blade 12, thereby increasing the gas pressure of the axial flow fan 10; when the second blade 13 is close to the air inlet side, the airflow pressurized by the second blade 13 can completely cover the main working surface of the first blade 12, and at the same time, it can also effectively avoid the problem of weakening the supercharging effect of the second blade 13 caused by the mutual interference between the tip vortex of the second blade 13 and the tip vortex of the first blade 12. Therefore, the first spacing d1 and the second spacing d2 satisfy: 0.3≤d2 / d1≤0.85, which can significantly improve the work capacity of the axial flow wind wheel 1, and at the same time, it can also effectively improve the pressure distribution of the suction surface 14 of the first blade 12, effectively suppress the airflow separation of the suction surface 14, and thereby improve the air volume and air supply efficiency of the axial flow fan 10.

[0045] For example, the ratio of the first distance d1 to the second distance d2 may be 0.3, 0.4, 0.5, 0.6, 0.7, 0.8 or 0.85.

[0046] According to some embodiments of the present invention, the second blades 13 and the first blades 12 are staggered in the circumferential direction of the hub 11, which can reduce the space occupied by the second blades 13 in the axial direction of the hub 11, thereby reducing the overall volume of the axial flow wind wheel 1 and improving the assembly integration of the axial flow fan 10.

[0047] Furthermore, in the projection plane perpendicular to the axis of the hub 11, the projection of the second blade 13 is located outside the projection of the first blade 12, and the projection of the second blade 13 does not overlap with the projection of the first blade 12 at all; this can further reduce the space occupied by the second blade 13 in the axial direction of the hub 11, thereby reducing the overall volume of the axial flow wind wheel 1 and improving the assembly integration of the axial flow fan 10; at the same time, the first blade 12 and the second blade 13 can form a slope with a gentle slope, which can be beneficial to the climbing of the airflow and reduce the work required for the climbing of the airflow, thereby further improving the air volume and fan efficiency.

[0048] According to some embodiments of the present invention, the second blade 13 is located on the upstream side of the first blade 12 along the airflow direction. That is, the second blade 13 is close to the air inlet side, and the first blade 12 is close to the air outlet side. When the axial flow wind wheel 1 is working, the airflow first passes through the second blade 13 to do work, and the airflow after doing work then enters the first blade 12 to do work, and the airflow after the second blade 13 is pressurized can completely cover the main working surface of the first blade 12, thereby improving the gas pressure, air supply volume and air supply efficiency of the axial flow wind wheel 1.

[0049] Furthermore, the two large surfaces of the first blade 12 and the second blade 13 are the suction surface 14 and the pressure surface 15 respectively, the suction surface 14 refers to the side of the blade facing the air intake side when the axial flow fan 10 is working, and the pressure surface 15 refers to the side of the blade facing the air outlet side when the axial flow fan 10 is working. At the same time, the blade also has a leading edge, an outer edge, a trailing edge and an inner edge, wherein the inner edge is the edge of the blade at the connection between the blade and the hub 11; the outer edge is the edge of the blade on the radial outside of the hub 11; the leading edge is arranged on the windward side, used to cut the air and separate the air between the pressure surface 15 and the suction surface 14; the trailing edge is arranged on the air supply side, used to continue to supply air forward.

[0050] Specifically, when the axial flow wind wheel 1 rotates, in the area near the trailing edge of the blade, the pressure surface 15 increases the local pressure of the air and pushes the air in the air supply direction, and the suction surface 14 reduces the local pressure of the air and attracts the air in the air supply direction, so that the static pressure of the pressure surface 15 is greater than that of the suction surface 14. Therefore, when the axial flow wind wheel 1 is working, when the airflow enters the first blade 12, the gas pressurized by the second blade 13 will flow more to the suction surface 14 of the first blade 12, thereby effectively improving the pressure distribution of the suction surface 14 of the first blade 12, increasing the wall attachment effect of the fluid on the suction surface 14, and effectively suppressing the airflow separation of the suction surface 14, thereby improving the air volume and air supply efficiency of the axial flow fan 10.

[0051] According to some embodiments of the present invention, Figure 4As shown, in the direction from one end of the hub 11 in the axial direction to the other end, one end of the first blade 12 connected to the hub 11 extends obliquely along the circumference of the hub 11, and one end of the second blade 13 connected to the hub 11 extends obliquely along the circumference of the hub 11, and the inclination direction of one end of the first blade 12 is the same as the inclination direction of one end of the second blade 13. In this way, the contact area between the first blade 12 and the second blade 13 and the incoming air can be increased, and then the interaction force between the first blade 12 and the second blade 13 and the air can be increased, so that the air supply volume of the axial flow fan 1 can be increased; at the same time, the inclination direction of the first blade 12 and the second blade 13 is the same, so that the gas flow direction on the surface of the first blade 12 and the second blade 13 is the same, and then the loss of the airflow flowing to the first blade 12 after the second blade 13 does work can be reduced, so that the air volume and fan efficiency of the axial flow fan 10 can be further improved.

[0052] According to some embodiments of the present invention, Figure 4-Figure 5 As shown, in the axial direction of the hub 11, the side edge of the first blade 12 facing the second blade 13 is the first edge 121, and the side edge of the second blade 13 facing the first blade 12 is the second edge 131, and the first edge 121 and the second edge 131 have a gap in the axial direction of the hub 11. Specifically, the first edge 121 is the leading edge of the first blade 12, and the second edge 131 is the trailing edge of the second blade 13. The first edge 121 and the second edge 131 have a gap in the axial direction of the hub 11, that is, a gap is formed between the leading edge of the first blade 12 and the trailing edge of the second blade 13. This gap allows the airflow to enter the first blade 12 to do work, and at the same time, it is also beneficial for the pressurized wind of the second blade 13 to flow to the first blade 12 through the gap. Since the static pressure of the pressure surface 15 is greater than the suction surface 14, the pressurized gas can flow more to the suction surface 14, thereby suppressing the airflow separation on the suction surface 14 of the first blade 12, thereby further improving the air supply volume and fan efficiency of the axial flow fan 10.

[0053] According to some embodiments of the present invention, Figure 4-Figure 5 As shown, in the radial direction from inside to outside of the hub 11, the inner end of the first blade 12 is fixed to the hub 11, and the outer end of the first blade 12 is bent radially outward along the hub 11 and toward the direction where the second blade 13 is located. In other words, the first blade 12 can be formed into a forward-bent swept structure, which can make the interaction force between the first blade 12 and the air stronger, thereby increasing the air volume of the axial flow fan 10.

[0054] According to some embodiments of the present invention, Figure 4-Figure 5As shown, in the axial direction of the hub 11, the end edge of the outer end of the first blade 12 facing the second blade 13 exceeds the edge of the second blade 13 facing away from the first blade 12. That is to say, in the axial direction of the hub 11, the first blade 12 can wrap the second blade 13, which can save the installation space of the second blade 13 in the axial direction of the hub 11, thereby reducing the overall volume of the axial flow wind wheel 1 and improving the assembly integration of the axial flow fan 10; at the same time, the work area of ​​the first blade 12 can be increased, thereby increasing the circumferential speed of the first blade 12, thereby increasing the wind speed and improving the efficiency of the fan.

[0055] According to some embodiments of the present invention, Figure 1-Figure 5 As shown, the number of the second blades 13 is multiple, and the multiple second blades 13 correspond one-to-one to the multiple first blades 12. For example, the number of the second blades 13 can be two, three or more, and the multiple second blades 13 correspond one-to-one to the multiple first blades 12, which can further homogenize the gas flow field, thereby improving the fan performance.

[0056] The axial flow fan 10 according to the second embodiment of the present invention comprises the axial flow wind wheel 1 according to the first embodiment of the present invention.

[0057] According to the axial flow fan 10 of the embodiment of the present invention, the overall performance of the axial flow fan 10 is improved by providing the axial flow wind wheel 1 of the first embodiment.

[0058] The air-conditioning outdoor unit 100 according to the third embodiment of the present invention comprises the axial flow fan 10 according to the second embodiment of the present invention.

[0059] According to the air-conditioning outdoor unit 100 of the embodiment of the present invention, the overall performance of the air-conditioning outdoor unit 100 is improved by disposing the axial flow fan 10 of the above-mentioned second embodiment.

[0060] Furthermore, the air conditioner outdoor unit 100 also includes a shell 20, a heat exchanger 30 and a motor bracket 40, and the axial flow fan 10 also includes a motor 2, wherein the shell 20 includes a accommodating cavity, and the heat exchanger 30, the motor bracket 40 and the axial flow fan 10 are all arranged in the accommodating cavity.

[0061] Specifically, the motor bracket 40 is used to support the motor 2, and the motor 2 is fixedly connected to the housing 20 of the air conditioner outdoor unit 100 through the motor bracket 40; the motor 2 provides power for the rotation of the axial flow fan 1, and the motor 2 is fixedly connected to the first blade 12 and the second blade 13 through the hub 11; in the air supply direction, the heat exchanger 30 is arranged downstream of the axial flow fan 10, and the heat exchanger 30 is used to heat the air flowing through the heat exchanger 30. When the air conditioner outdoor unit is started, the motor 2 drives the first blade 12 and the second blade 13 of the axial flow fan 1 to rotate, thereby driving the air flow to flow through the heat exchanger 30, and the heat exchanger 30 exchanges heat with the air flowing through, and then delivers it to the air conditioner indoor unit.

[0062] The air conditioner according to the fourth embodiment of the present invention comprises the axial flow fan 10 according to the second embodiment of the present invention.

[0063] According to the air conditioner of the embodiment of the present invention, the overall performance of the air conditioner is improved by disposing the axial flow fan 10 of the second embodiment.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An axial flow wind wheel, characterized in that: include: Wheel hub; a first blade, the first blade being connected to the hub and extending radially outward from the hub, the first blade being in plurality and being arranged at intervals along the circumference of the hub; a second blade, the second blade being connected to the hub and extending outwardly in the radial direction of the hub, the second blade and the first blade being arranged in layers in the axial direction of the hub, Wherein, in the radial direction of the hub, the distance between the outer end of the first blade and the central axis of the hub is a first distance, the distance between the outer end of the second blade and the central axis of the hub is a second distance, and the first distance is greater than the second distance.

2. The axial flow wind wheel according to claim 1, characterized in that: The first interval d1 and the second interval d2 further satisfy: 0.3≤d2 / d1≤0.

85.

3. The axial flow wind wheel according to claim 1, characterized in that: The second blades and the first blades are staggered in the circumferential direction of the hub.

4. The axial flow wind wheel according to claim 1, characterized in that: The second blade is located at an upstream side of the first blade along a flow direction of the airflow.

5. The axial flow wind wheel according to claim 1, characterized in that: In a direction from one end in the axial direction of the hub toward the other end, one end of the first blade connected to the hub extends obliquely along the circumference of the hub, and one end of the second blade connected to the hub extends obliquely along the circumference of the hub, and the inclination direction of the one end of the first blade is the same as the inclination direction of the one end of the second blade.

6. The axial flow wind wheel according to claim 1, characterized in that: In the axial direction of the hub, an edge of the first blade facing the second blade is a first edge, an edge of the second blade facing the first blade is a second edge, and there is a gap between the first edge and the second edge in the axial direction of the hub.

7. The axial flow wind wheel according to claim 1, characterized in that: In a radial direction from inside to outside of the hub, the inner end of the first blade is fixed to the hub, and the outer end of the first blade is bent radially outward from the hub and toward the direction where the second blade is located.

8. The axial flow wind wheel according to claim 7, characterized in that: In the axial direction of the hub, an end edge of an outer end of the first blade facing the second blade exceeds a side edge of the second blade facing away from the first blade.

9. The axial flow wind wheel according to claim 1, characterized in that: There are multiple second blades, and the multiple second blades correspond one-to-one to the multiple first blades.

10. An axial flow fan, characterized in that: It comprises an axial flow wind wheel according to any one of claims 1-9.

11. An air conditioner outdoor unit, characterized in that: Comprising the axial flow fan according to claim 10.

12. An air conditioner, characterized in that: Comprising the axial flow fan according to claim 10.

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