Air outlet grille and air conditioner outdoor unit

Abstract

The utility model relates to the technical field of air conditioners, and discloses an air outlet grille and an air conditioner outdoor unit. The air outlet grille comprises a center plate; the multiple first ribs are sequentially arranged on the outer side of the center plate at intervals in the circumferential direction of the center plate; wherein the first ribs extend in the radial direction of the air outlet grille, the first ribs are bent, and the bending direction of the first ribs is suitable for being opposite to the bending direction of fan blades of the axial flow fan. The bending direction of the first ribs in the radial direction of the air outlet grating is opposite to the bending direction of the fan blades of the axial flow fan, so that resonance between the air outlet grating and the fan can be avoided, and structural vibration radiation noise is reduced. And meanwhile, the influence on the flow field of the axial flow fan can be reduced through the arrangement of the first ribs, aerodynamic noise of the axial flow fan is reduced, and the air supply quality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, for example, to an air outlet grille and an air conditioning outdoor unit. Background Art

[0002] At present, the grille in the air supply system of the traditional air conditioner outdoor unit only has the function of guiding air and protecting it. The inner rotor motor drives the axial flow fan, and the motor bracket supports the motor and fan. The air from the air conditioner outdoor unit flows out through the air outlet grille.

[0003] In the related art, the fan is connected to the air outlet grille, and the air outlet grille also has an installation support function.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The air outlet grilles in the related art are generally made of plastic, which has low strength and is prone to resonance, generating structural vibration radiation noise.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiments provide an air outlet grille and an air conditioner outdoor unit to improve the strength of the grille and avoid resonance and noise.

[0009] An embodiment of the present disclosure provides an air outlet grille suitable for installation on the air outlet side of an axial flow fan, the air outlet grille comprising: a center plate suitable for connection with the axial flow fan; a plurality of first ribs, the plurality of first ribs being arranged in sequence and spaced apart on the outer side of the center plate along the circumferential direction of the center plate; wherein the first ribs extend radially along the air outlet grille, and the first ribs are curved, and the bending direction of the first ribs is suitable to be opposite to the bending direction of the blades of the axial flow fan.

[0010] Optionally, the distance between adjacent first ribs increases along the direction from the center plate to the outer edge of the air outlet grille; and / or, the number of the first ribs is suitable to be greater than or equal to the number of blades of the axial flow fan.

[0011] Optionally, a bending angle of the first rib relative to the radial direction of the air outlet grille is adapted to be consistent with a bending angle of a blade of the axial flow fan.

[0012] Optionally, the length of the first rib along the flow direction of the airflow is greater than 8 mm.

[0013] Optionally, along the flow direction of the airflow, the thickness of the first rib gradually decreases, wherein the thickness of the first rib refers to the dimension of the first rib perpendicular to the flow direction of the airflow.

[0014] Optionally, the thickness of the first rib y=-0.012x 2 -0.06x+4, wherein x is the length of the first rib along the airflow direction.

[0015] Optionally, the air outlet grille further includes: a second rib, which is annular and connected between the plurality of first ribs; wherein the number of the second ribs is multiple, and the plurality of second ribs are sequentially spaced apart in a direction from the center plate to the outer edge of the air outlet grille.

[0016] Optionally, the air outlet grille also includes: a grille frame, which is spaced apart on the outside of the center plate, and a first rib is connected between the grille frame and the center plate; wherein the grille frame is provided with a mounting portion, and the mounting portion is suitable for connection with an external component; and / or the center plate is constructed with a connecting portion, and the connecting portion is suitable for detachable connection with the axial flow fan.

[0017] The disclosed embodiment further provides an air-conditioning outdoor unit, which includes an air outlet grille as described in any of the above embodiments.

[0018] Optionally, the air conditioner outdoor unit also includes: a shell, which defines a fan cavity with an air outlet, and an air outlet grille is arranged at the air outlet; an axial flow fan, located in the fan cavity, including a fan blade part and an outer rotor motor; wherein one end of the outer rotor motor is connected to the connecting part of the center plate.

[0019] The air outlet grille and the air conditioner outdoor unit provided in the embodiments of the present disclosure can achieve the following technical effects:

[0020] The air outlet grille provided in the embodiment of the present disclosure is arranged on the air outlet side of the axial flow fan, so that the air outlet of the axial flow fan can be guided. The air outlet grille is provided with a center plate and a plurality of first ribs, and the plurality of first ribs are arranged in sequence along the circumference of the center plate at intervals, so that the strength of the air outlet grille and the overall torsional stiffness can be improved. The radial bending direction of the first ribs along the air outlet grille is opposite to the bending direction of the blades of the axial flow fan, so that the resonance between the air outlet grille and the fan can be avoided, the structural vibration radiation noise can be reduced, and the whole set vibration reduction and noise reduction can be achieved. At the same time, the setting of the first ribs can reduce the impact on the flow field of the fan, reduce the aerodynamic noise of the fan, and improve the air supply quality. It can also increase the modal frequency of the air conditioner outdoor unit as a whole, reduce the vibration of the grille and reduce the possibility of resonance.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a structural schematic diagram of an air-conditioning outdoor unit provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of the coordination structure of a fan and an air outlet grille provided in an embodiment of the present disclosure from a perspective;

[0025] Figure 3 is a schematic diagram of the coordination structure of a fan and an air outlet grille provided in an embodiment of the present disclosure from another perspective;

[0026] Figure 4 is a structural schematic diagram of an air outlet grille provided by an embodiment of the present disclosure from a viewing angle;

[0027] Figure 5 is a schematic diagram of the coordination structure of a fan and an air outlet grille provided in an embodiment of the present disclosure from another perspective;

[0028] Figure 6 is a schematic diagram of a cross-sectional structure of an air outlet grille provided in an embodiment of the present disclosure;

[0029] Figure 7 is a structural schematic diagram of an air outlet grille provided by an embodiment of the present disclosure from another perspective;

[0030] Figure 8 is a schematic structural diagram of a fan provided by an embodiment of the present disclosure;

[0031] Fig. 9 is a schematic structural diagram of a fan blade portion provided by an embodiment of the present disclosure;

[0032] Fig.10 is a structural schematic diagram of an outer rotor motor provided by an embodiment of the present disclosure;

[0033] Fig.11 It is a schematic diagram of the matching structure of an air guide ring and a fan provided in an embodiment of the present disclosure;

[0034] Fig.12 is a schematic diagram of the matching structure of an air guide ring and a shell provided in an embodiment of the present disclosure;

[0035] Fig.13is a schematic cross-sectional structure diagram of an air-conditioning outdoor unit provided by an embodiment of the present disclosure;

[0036] Fig.14 It is a partial structural schematic diagram of an air-conditioning outdoor unit provided by an embodiment of the present disclosure;

[0037] Fig.15 It is a schematic diagram of the structure of an air outlet grille provided in an embodiment of the present disclosure.

[0038] Reference numerals:

[0039] 10. Shell; 101. Air outlet; 102. Heat exchanger; 103. Fan cavity; 104. Compressor cabin; 20. Axial flow fan; 201. Blade portion; 202. Blade; 203. Hollow hub; 204. Outer rotor motor; 2041. Rotor; 2042. Stator; 2043. Second screw hole; 30. Air outlet grille; 301. Center plate; 302. First rib; 303. Second rib; 304. Grille frame; 305. Connecting plate; 306. First screw hole; 40. Air guide ring. DETAILED DESCRIPTION

[0040] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0041] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate to describe the disclosed embodiments here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0043] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0044] Unless otherwise stated, the term "plurality" means two or more.

[0045] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0046] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0047] Combination Figures 1 to 7 and Fig.15 As shown, the embodiment of the present disclosure provides an air outlet grille 30 suitable for installation on the air outlet side of an axial flow fan, such as Figure 3 As shown, the air outlet grille 30 includes a center plate 301 and first ribs 302, the number of the first ribs 302 is multiple, and the multiple first ribs 302 are arranged in sequence and spaced apart on the outer side of the center plate 301 along the circumferential direction of the center plate 301; wherein the first ribs 302 extend along the radial direction of the air outlet grille 30, and the first ribs 302 are curved, and the bending direction of the first ribs 302 is suitable to be opposite to the bending direction of the blades 202 of the axial flow fan.

[0048] In the disclosed embodiment, the air outlet grille 30 includes a central plate 301 and a first rib 302. The number of the first rib 302 is multiple, and the multiple first ribs 302 are sequentially arranged on the outer side of the central plate 301 along the circumference of the central plate 301, so that the strength of the air outlet grille 30 can be improved. The first rib 302 is bent relative to the radial direction of the air outlet grille 30, so that the length and anti-deformation ability of the first rib 302 can be increased, and the strength of the air outlet grille 30 can be improved. The bending direction of the first rib 302 is opposite to the bending direction of the blade 202 of the axial flow fan, so that the air outlet grille 30 and the airflow of the axial flow fan 20 can be prevented from resonating, and the structural vibration radiation noise can be avoided. In addition, the first rib 302 is also bent, which can reduce the impact on the flow field of the axial flow fan 20, reduce the aerodynamic noise of the axial flow fan 20, and improve the air supply quality. The bending angle of the blade 202 is usually to guide the airflow to leave the axial flow fan 20 in a specific direction and speed. The bending angle of the first rib 302 of the air outlet grille 30 is opposite to that of the blade 202. The air outlet grille 30 can further guide the airflow and reduce the turbulence of the airflow, thereby improving the stability and uniformity of the airflow. Moreover, when the airflow passes through the blade 202 and the air outlet grille 30, turbulence and eddy currents may be generated, which will increase the noise. By designing the bending angle of the first rib 302 of the air outlet grille 30 to be opposite to that of the blade 202, these phenomena can be reduced, thereby reducing the noise. In addition, this can optimize the design of the air outlet grille 30, reduce the energy loss of the airflow when passing through the axial flow fan 20, and improve the efficiency of the axial flow fan 20. In addition, the first rib 302 of the air outlet grille 30 is bent in the opposite direction relative to the blade 202 of the axial flow fan 20, which helps to reduce the back pressure, allows the airflow to pass through the axial flow fan 20 more smoothly, and can also improve the heat dissipation performance.

[0049] Optionally, the center plate 301 is suitable for connecting with the center plate of the air outlet grille 30. In this way, the motor bracket in the air supply system of the traditional air conditioner outdoor unit is eliminated, and the air outlet grille 30 is used to fix and support the axial flow fan 20 and the motor. The disclosed embodiment can minimize the obstruction to the wind, reduce the loss of air volume, improve the efficiency of the outdoor unit, and thus improve the heat exchange efficiency. In addition, eliminating the motor bracket can also reduce the space in the fan cavity 103, thereby reducing the size of the air conditioner outdoor unit and realizing the miniaturization of the air conditioner outdoor unit.

[0050] Optionally, the distance between adjacent first ribs 302 increases along the direction from the center plate 301 to the outer edge of the air outlet grille 30. In the disclosed embodiment, the distance between adjacent first ribs 302 gradually increases along the direction from the center to the outer edge, which can reduce the air outlet resistance and improve the air outlet efficiency.

[0051] Optionally, a plurality of first ribs 302 are evenly spaced in sequence along the circumference of the center plate 301 .

[0052] In the disclosed embodiment, the plurality of first ribs 302 are evenly spaced, so that the air outlet of the air outlet grille 30 is more uniform.

[0053] Optionally, the bending angle of the first rib 302 relative to the radial direction of the air outlet grille 30 is adapted to be consistent with the bending angle of the blade 202 of the axial flow fan.

[0054] In the disclosed embodiment, the bending angle of the first rib 302 is consistent with the bending angle of the fan blade 202, so that the symmetry of the airflow can be achieved, which helps to reduce the unevenness and eddy current of the airflow, thereby improving the stability of the airflow. Moreover, the pressure distribution of the axial flow fan 20 at the air outlet grille is made more uniform, reducing the situation where the local pressure is too high or too low, thereby improving the performance and efficiency of the axial flow fan 20. Moreover, the turbulence and eddy current of the airflow when passing through the axial flow fan 20 can be reduced, which helps to reduce the noise when the axial flow fan 20 is running. Moreover, such a symmetrical airflow design can more effectively take away heat from the heat source and improve the heat dissipation efficiency of the air conditioner outdoor unit. It can effectively reduce the energy loss of the airflow when passing through the axial flow fan 20, and improve the energy efficiency of the axial flow fan 20.

[0055] Optionally, the bending angles of the plurality of first ribs 302 are the same to improve manufacturing convenience and reduce costs, and the pressure distribution of the axial flow fan 20 at the air outlet grille is more uniform.

[0056] Optionally, the number of the first ribs 302 is greater than or equal to the number of blades of the axial flow fan.

[0057] In the disclosed embodiment, the bending angle of the first rib 302 is the same as the bending angle of the blade of the axial flow fan, but the number of the first ribs 302 is greater than or equal to the number of the blades, which can increase the density of the first ribs 302, thereby increasing the strength of the air outlet grille 30 and improving the anti-deformation ability of the air outlet grille. In addition, multiple first ribs 302 can make the airflow distribution more uniform.

[0058] Optionally, the number of the blades 202 of the axial flow fan may be three, four, or five.

[0059] Optionally, the number of the first ribs 302 is greater than or equal to 10 and less than or equal to 20. This can ensure that the first ribs 302 guide the airflow and improve the strength of the air outlet grille 30, and can also avoid the first ribs 302 being too dense and increasing the resistance to the airflow.

[0060] Optionally, the number of the first ribs 302 is greater than or equal to 14 and less than or equal to 17.

[0061] For example, the number of the first ribs 302 may be 12, 13, 14, 15, 16, 17 or 18.

[0062] Optionally, the blade 202 of the axial flow fan is a forward-swept blade, and the sweep angle of the first rib 302 is the same as the forward sweep angle of the blade 202 of the axial flow fan. Here, the forward sweep angle of the blade 202 of the axial flow fan refers to the angle between the leading edge of the blade 202 and the axis of rotation. This angle is usually not perpendicular to the axis, but tilted forward, that is, it forms a forward angle with the incoming flow direction. Similarly, the sweep angle of the first rib 302 refers to the angle between the first rib 302 and the center of the air outlet grille 30. This angle is also not perpendicular to the axis, but tilted backward, forming a backward angle with the flow direction of the airflow.

[0063] Optionally, the length of the first rib 302 along the flow direction of the airflow is greater than 8 mm.

[0064] In the embodiment of the present disclosure, the length of the first rib 302 along the flow direction of the airflow is greater than 8 mm, which can increase the length of the first rib 302 in the flow direction of the airflow and thereby increase the size of the first rib 302, increase the torsional stiffness of the first rib 302, improve the anti-twisting ability, and thereby increase the strength of the air outlet grille 30.

[0065] Optionally, along the flow direction of the airflow, the thickness of the first rib 302 gradually decreases, wherein the thickness of the first rib 302 refers to the dimension of the first rib 302 perpendicular to the flow direction of the airflow.

[0066] In the disclosed embodiment, the thickness of the first rib 302 gradually decreases along the flow direction of the airflow, which can reduce the flow resistance of the airflow and adjust the torsional modal frequency of the air outlet grille 30 to avoid resonance of the air outlet grille 30 and reduce noise.

[0067] Optionally, along the flow direction of the airflow, the thickness of the first rib 302 decreases nonlinearly, so as to avoid resonance, vibration and abnormal sound caused by excessive swing of the axial flow fan 20.

[0068] Alternatively, if Figure 6 As shown, the thickness of the first rib 302 is y=-0.012x 2 -0.06x+4, where x is the length of the first rib 302 along the airflow direction. In this way, the torsional modal frequency of the air outlet grille 30 can be higher than the rotation frequency of the axial flow fan 20, thereby avoiding the problems of resonance, abnormal vibration, and touching the air guide ring 40 caused by excessive swing of the axial flow fan 20.

[0069] Optionally, the air outlet grille 30 also includes a second rib 303, which is annular and connected between multiple first ribs 302; wherein the number of second ribs 303 is multiple, and the multiple second ribs 303 are arranged in sequence at intervals along the direction from the center plate 301 to the outer edge of the air outlet grille 30.

[0070] In the disclosed embodiment, the second ribs 303 are used to connect the plurality of first ribs 302 so as to fix the plurality of first ribs 302 along the circumference of the air outlet grille 30. The number of the second ribs 303 is also multiple, which can enhance the fixing effect on the first ribs 302 and further enhance the overall strength of the air outlet grille 30.

[0071] Optionally, the end surface of the second rib 303 facing the fan cavity is flush with the end surface of the first rib 302 facing the fan cavity, which facilitates the installation of the axial flow fan 20 and avoids affecting the flow field of the axial flow fan 20 and generating noise.

[0072] Optionally, the end surface of the first rib 302 facing away from the fan cavity protrudes beyond the end surface of the second rib 303 facing away from the fan cavity. This can increase the length of the first rib 302 along the airflow direction, improve the guiding effect of the first rib 302 on the airflow, and improve the torsional resistance and strength of the air outlet grille 30.

[0073] Optionally, the air outlet grille 30 also includes a grille frame 304, which is spaced apart on the outside of the center plate 301, and the first rib 302 is connected between the grille frame 304 and the center plate 301; wherein the grille frame 304 is provided with a mounting portion, and the mounting portion is suitable for connecting to the shell 10.

[0074] In the disclosed embodiment, the grille frame 304 is located at the outer edge of the air outlet grille 30, the grille frame 304 is annular, and the first rib 302 is connected between the grille frame 304 and the center plate 301, which facilitates the fixation of the first rib 302. In addition, the grille frame 304 is provided with a mounting portion, which is used to be connected to the housing 10 to facilitate the installation of the air outlet grille 30.

[0075] Optionally, the mounting portion includes a connecting plate 305 , which is connected to the grid frame 304 and extends outward from the grid frame 304 , and the connecting plate 305 is suitable for connecting to the housing 10 .

[0076] Optionally, the connecting plate 305 is configured with screw holes, and the screw holes are suitable for connecting with the housing 10 by screws.

[0077] Optionally, the connecting plate 305 is configured with a buckle or a slot, and the connecting plate 305 is suitable for being snap-connected with the housing 10 .

[0078] Optionally, there are multiple connecting plates 305 , and the multiple connecting plates 305 are sequentially spaced apart along the circumference of the air outlet grille 30 to improve the connection stability between the air outlet grille 30 and the housing 10 .

[0079] Optionally, the center plate 301 is configured with a connection portion, and the connection portion is suitable for being detachably connected to the axial flow fan 20 .

[0080] In the disclosed embodiment, the center plate can be connected to the axial flow fan through the connection part, that is, the axial flow fan is arranged on the air outlet grille, and the fan and the motor are fixed and supported by the air outlet grille. The disclosed embodiment can minimize the obstruction to the wind, reduce the loss of air volume, improve the efficiency of the outdoor unit, and thus improve the heat exchange efficiency. In addition, the center plate and the axial flow fan are detachably connected, which is convenient for the installation, disassembly and maintenance of the axial flow fan.

[0081] Optionally, the center plate and the axial flow fan may be connected by means of screws, magnets, or snaps.

[0082] Optionally, the center plate 301 is provided with a first screw hole 306, and a plurality of first screw holes 306 are arranged in sequence and spaced apart along the circumference of the center plate 301, and the stator 2042 of the outer rotor motor 204 is provided with a second screw hole 2043, and the fastener is suitable for passing through the first screw hole 306 and the second screw hole 2043 to connect the outer rotor motor 204 and the air outlet grille 30, wherein the number of the second screw holes 2043 is suitable to be the same as the number of the first screw holes 306 and correspond one to one.

[0083] In the embodiment of the present disclosure, the center plate 301 is provided with a first screw hole 306, and the stator 2042 of the outer rotor motor 204 is provided with a second screw hole 2043 corresponding to the first screw hole 306. The fastener passes through the first screw hole 306 and the second screw hole 2043 to achieve the connection between the outer rotor motor 204 and the air outlet grille 30. Specifically, the first screw hole 306 and the second screw hole 2043 are provided in plurality, which can further improve the connection stability between the outer rotor motor 204 and the air outlet grille 30.

[0084] Optionally, the connecting portion is a first screw hole 306 .

[0085] Optionally, the air outlet grille is made of plastic.

[0086] The disclosed embodiment further provides an air-conditioning outdoor unit, which includes an air outlet grille according to any one of the above embodiments.

[0087] The air conditioner outdoor unit provided in the embodiment of the present disclosure includes the air outlet grille of any one of the above embodiments, and therefore has the beneficial effects of the air outlet grille of any one of the above embodiments, which will not be described in detail here.

[0088] Combination Figures 1 to 14 As shown, an embodiment of the present disclosure provides an air conditioner outdoor unit, which includes a housing 10, an air outlet grille 30 and an axial flow fan 20. The housing 10 defines a fan chamber 103 having an air inlet and an air outlet 101; the air outlet grille 30 is located at the air outlet 101; the axial flow fan 20 is located in the fan chamber 103, and the axial flow fan 20 is arranged on the air outlet grille 30. The air conditioner outdoor unit also includes a heat exchanger 102, which is located in the fan chamber 103.

[0089] In the disclosed embodiment, the housing 10 has an air inlet and an air outlet 101, and the axial flow fan 20 can drive the air flow from the air inlet into the fan chamber 103, and then flow through the heat exchanger 102 and exchange heat with the heat exchanger 102, and then flow out from the air outlet 101. The air outlet grille 30 is arranged at the air outlet 101, so that the air outlet grille 30 can guide the air flow flowing out of the air outlet 101. Similarly, the air outlet grille 30 can also prevent foreign impurities from entering the fan chamber 103, and protect the components inside the housing 10 of the air conditioner outdoor unit. The axial flow fan 20 is arranged at the air outlet grille 30, and the motor bracket in the traditional air supply system of the air conditioner outdoor unit is eliminated, and the air outlet grille 30 is used to fix and support the axial flow fan 20 and the motor. The disclosed embodiment can minimize the obstruction to the wind, reduce the loss of air volume, improve the efficiency of the outdoor unit, and thus improve the heat exchange efficiency. In addition, eliminating the motor bracket can also reduce the space in the fan chamber 103, thereby reducing the size of the air-conditioning outdoor unit and achieving miniaturization of the air-conditioning outdoor unit.

[0090] Alternatively, if Figure 5 and Fig.13 As shown, the shell 10 further defines a compressor compartment 104, which is separated from the fan chamber 103. The air conditioner outdoor unit also includes a compressor, which is located in the compressor compartment 104. The compressor is connected to the heat exchanger 102 through a refrigerant pipeline.

[0091] Optionally, along the flow direction of the airflow in the fan chamber 103, the heat exchanger 102 and the fan 20 are arranged in sequence and spaced apart.

[0092] Optionally, the heat exchanger 10 is L-shaped.

[0093] Optionally, the air outlet grille 30 matches the air outlet 101 , that is, the air outlet grille 30 and the air outlet 101 have the same or similar shape and size, so that the air outlet grille 30 can be installed at the air outlet 101 .

[0094] Optionally, the air outlet 101 is disposed on the front side wall of the housing 10 to facilitate the air outlet to the front.

[0095] Optionally, the air inlet is arranged opposite to the air outlet 101; or, multiple side walls of the fan cavity 103 are provided with air inlets, for example, the rear side wall and the right side wall of the fan cavity 103 are provided with air inlets.

[0096] Optionally, the distance between the trailing edge of the axial flow fan 20 and the air outlet grille 30 satisfies 0.05d < L < 0.3d, where d is the diameter of the axial flow fan 20.

[0097] In the embodiments of the present disclosure, when the distance between the trailing edge of the axial flow fan 20 and the air outlet grille 30 is less than 0.05d, the distance between the axial flow fan 20 and the air outlet grille 30 is too close, resulting in the generation of eddy currents at the trailing edge of the axial flow fan 20, which easily collide with the air outlet grille 30, resulting in relatively high noise. When the distance between the trailing edge of the axial flow fan 20 and the air outlet grille 30 is greater than 0.3d, the distance between the axial flow fan 20 and the air outlet grille 30 is too far, which is not convenient for the fixed installation of the axial flow fan 20. On the other hand, it will also cause the installation between the axial flow fan 20 and the air outlet grille 30 to be unstable. When the axial flow fan 20 rotates, it is easy to generate shaking, affecting the reliability of the system. Therefore, when the distance between the trailing edge of the axial flow fan 20 and the air outlet grille 30 is between 0.05d < L < 0.3d, it can not only reduce noise but also ensure the reliability of the system.

[0098] As Figure 4 shown, the trailing edge of the axial flow fan 20 refers to the trailing edge part of the fan blade 202 of the axial flow fan 20, that is, the area where the fan blade 202 transitions from the working surface to the back surface. In the axial flow fan 20, especially in the axial flow fan, air flows through the fan blade 202 and is discharged from the trailing edge. Therefore, the design of the trailing edge has an important impact on the performance and noise level of the axial flow fan 20. The trailing edge can be designed with different shapes, such as serrated, circular, etc., to optimize the aerodynamic performance of the axial flow fan 20 and reduce noise. Optionally, a sinusoidal serrated structure can be added to the trailing edge of the axial flow fan 20 to improve the wake flow and reduce the fan noise. In addition, the design of the trailing edge may also affect the aerodynamic characteristics and internal flow characteristics of the axial flow fan 20.

[0099] Optionally, the distance between the trailing edge of the axial flow fan 20 and the air outlet grille 30 satisfies 0.1d < L < 0.2d.

[0100] In the embodiments of the present disclosure, the distance between the trailing edge of the axial flow fan 20 and the air outlet grille 30 can be further reduced to between 0.1d and 0.2d, which can effectively increase the air volume while reducing noise and ensuring the reliability of the system.

[0101] For example, the distance L between the trailing edge of the axial flow fan 20 and the air outlet grille 30 can be 0.11d, 0.12d, 0.13d, 0.15d, 0.16d, 0.17d, 0.2d, 0.21d, 0.23d, 0.25d, 0.27d or 0.29d, etc.

[0102] Optionally, as Figures 8 to 10As shown, the axial flow fan 20 includes a blade portion 201 and an outer rotor motor 204 . The blade portion 201 is connected to the outside of the outer rotor motor 204 , and one end of the outer rotor motor 204 is connected to the air outlet grille 30 .

[0103] In the disclosed embodiment, the fan blade portion 201 is used to rotate, and the outer rotor motor 204 is used to drive the fan blade portion 201 to rotate. The outer rotor motor 204 includes a stator 2042 and a rotor 2041. The rotor 2041 is rotatably arranged outside the stator 2042. The rotor 2041 is connected to the fan blade portion 201, so that the rotor 2041 can drive the fan blade portion 201 to rotate around the stator 2042 to realize the rotation of the fan blade portion 201. The stator 2042 is connected to the air outlet grille 30, so that the axial flow fan 20 can be fixed and the rotation of the fan blade portion 201 of the axial flow fan 20 is also facilitated.

[0104] Optionally, the fan blade portion 201 is detachably connected to the outer rotor motor 204 .

[0105] In the disclosed embodiment, the fan blade portion 201 is detachably connected to the outer rotor motor 204, which facilitates the disassembly and installation of the axial flow fan 20. In particular, during installation, the outer rotor motor 204 can be first installed on the air outlet grille 30, and then the fan blade portion 201 can be installed on the outer rotor motor 204, which can avoid the distance between the air outlet grille 30 and the axial flow fan 20 being too small, affecting the installation of the axial flow fan 20.

[0106] Optionally, the fan blade portion 201 includes a hollow hub 203 and fan blades 202, the number of the fan blades 202 is multiple, and the multiple fan blades 202 are arranged in sequence and spaced apart on the outer side of the hollow hub 203 along the circumference of the hollow hub 203; wherein the hollow hub 203 is sleeved on the outer side of the outer rotor motor 204, and the hollow hub 203 is connected to the outer rotor motor 204 by a snap-fit.

[0107] In the disclosed embodiment, a plurality of fan blades 202 are arranged in sequence at intervals along the circumference of the hollow hub 203, and the hollow hub 203 is connected to the outer rotor motor 204 by a snap-fit. Specifically, the hollow hub 203 is connected to the rotor 2041 of the outer rotor motor 204, so that the rotor 2041 of the outer rotor motor 204 drives the plurality of fan blades 202 to rotate through the hollow hub 203, so as to realize the driving effect of the axial flow fan 20.

[0108] Optionally, one of the hollow hub 203 and the rotor 2041 of the outer rotor motor 204 is provided with a clip, and the other of the hollow hub 203 and the rotor 2041 of the outer rotor motor 204 is provided with a slot, the clip is adapted to the slot, and when the clip is located in the slot, the hollow hub 203 is connected to the outer rotor motor 204.

[0109] Optionally, the hollow hub 203 and the outer rotor motor 204 may also be connected by means of screws, magnetism, etc.

[0110] Alternatively, if Figure 7 As shown, the air outlet grille 30 is constructed with a central plate 301 , and the stator 2042 of the outer rotor motor 204 is detachably connected to the central plate 301 .

[0111] In the disclosed embodiment, the air outlet grille 30 is configured with a central plate 301 , and the central plate 301 is used to be connected to the outer rotor motor 204 to facilitate the fixation of the axial flow fan 20 .

[0112] Optionally, the center plate 301 is provided with a first screw hole 306, and a plurality of first screw holes 306 are arranged in sequence and spaced apart along the circumference of the center plate 301, and the stator 2042 of the outer rotor motor 204 is provided with a second screw hole 2043, and the fastener passes through the first screw hole 306 and the second screw hole 2043 to connect the outer rotor motor 204 and the air outlet grille 30, wherein the number of the second screw holes 2043 is the same as the number of the first screw holes 306 and corresponds one to one.

[0113] In the embodiment of the present disclosure, the center plate 301 is provided with a first screw hole 306, and the stator 2042 of the outer rotor motor 204 is provided with a second screw hole 2043 corresponding to the first screw hole 306. The fastener passes through the first screw hole 306 and the second screw hole 2043 to achieve the connection between the outer rotor motor 204 and the air outlet grille 30. Specifically, the first screw hole 306 and the second screw hole 2043 are provided in plurality, which can further improve the connection stability between the outer rotor motor 204 and the air outlet grille 30.

[0114] Optionally, the connecting portion is a first screw hole 306 .

[0115] Optionally, the center plate 301 and the stator 2042 of the outer rotor motor 204 may also be connected by means of magnetism, snap-fitting, or a combination of magnetism and screws, a combination of magnetism and snap-fitting, or a combination of snap-fitting and screws.

[0116] Optionally, the center plate 301 is circular.

[0117] Optionally, along the direction from the air outlet grille 30 to the axial flow fan 20, the projection of the center plate 301 is located inside the outer rotor motor 204, so that the center plate 301 will not block the air outlet of the blade portion 201 of the axial flow fan 20, thereby maximizing the air outlet volume and air outlet efficiency.

[0118] Optionally, along the direction from the air outlet grille 30 to the axial flow fan 20 , the projection of the central plate 301 is located inside the hollow hub 203 .

[0119] Alternatively, if Figure 11 to Figure 12As shown in the figure, the air conditioner outdoor unit further includes a wind guiding ring 40. The wind guiding ring 40 is provided on the wall surface of the air outlet grille 30 facing the fan chamber 103, and the wind guiding ring 40 extends towards the inside of the fan chamber 103. The wind guiding ring 40 extends annularly along the circumference of the air outlet 101. Among them, along the flowing direction of the air flow in the fan chamber 103, at least a part of the axial flow fan 20 is located inside the wind guiding ring 40.

[0120] In the embodiment of the present disclosure, the wind guiding ring 40 is provided on the wall surface of the air outlet grille 30 facing the fan chamber 103. Along the flowing direction of the air flow in the fan chamber 103, at least a part of the axial flow fan 20 is located inside the wind guiding ring 40. In this way, the wind guiding ring 40 can better converge the air flow generated by the axial flow fan 20, so that the air flow can flow out of the air outlet 101 more efficiently.

[0121] Optionally, the trailing edge of the axial flow fan 20 is located inside the wind guiding ring 40.

[0122] In the embodiment of the present disclosure, since the axial flow fan 20 is connected to the air outlet grille 30, therefore, the trailing edge of the axial flow fan 20 can be located inside the wind guiding ring 40. In this way, the wind guiding ring 40 can guide and rectify the air flow at the trailing edge, reduce the generation of eddy currents, and thus reduce the noise caused by the shedding from the trailing edge. And the wind guiding ring 40 helps to optimize the distribution of the air flow, so that the air flow passes through the fan blades 202 more evenly, improving the overall efficiency of the axial flow fan 20. In addition, it can also reduce the air flow separation at the trailing edge, reduce the generation of turbulence, and improve the air flow stability. And the wind guiding ring 40 can adjust the air flow after flowing through the trailing edge, improve the aerodynamic performance of the axial flow fan 20, and increase the air volume and air pressure. The trailing edge of the axial flow fan 20 being located inside the wind guiding ring 40 can further reduce the size of the fan chamber 103, and thus reduce the size of the air conditioner outdoor unit.

[0123] Optionally, as Fig.14 shown, the wind guiding ring 40 is sleeved outside the axial flow fan 20 at intervals. Along the radial direction of the wind guiding ring 40, the distance S between the wind guiding ring 40 and the axial flow fan 20 satisfies 15mm < S < 25mm.

[0124] In the embodiment of the present disclosure, the wind guiding ring 40 is sleeved outside the axial flow fan 20 at intervals. In this way, there is a gap between the wind guiding ring 40 and the axial flow fan 20, and the wind guiding ring 40 will not affect the rotation of the axial flow fan 20. When the distance between the wind guiding ring 40 and the axial flow fan 20 is less than 15mm, the distance between the axial flow fan 20 and the wind guiding ring 40 is too small, and the air flow resistance is large, which is likely to generate relatively large noise. When the distance between the axial flow fan 20 and the wind guiding ring 40 is greater than 25mm, the distance between the wind guiding ring 40 and the axial flow fan 20 is large, which is likely to cause air leakage and reduce the air outlet efficiency. Therefore, the distance S between the wind guiding ring 40 and the axial flow fan 20 satisfies 15mm < S < 25mm, which can not only reduce the noise but also improve the air outlet efficiency.

[0125] The disclosed embodiment also discloses an air conditioner, which includes an air conditioner outdoor unit as described in any one of the above embodiments.

[0126] Optionally, the air conditioner is a wall-mounted air conditioner, a duct air conditioner, or a cabinet air conditioner.

[0127] The air conditioner provided in the embodiment of the present disclosure includes the air conditioner outdoor unit of any one of the above-mentioned embodiments, and thus has the beneficial effects of any one of the above-mentioned air conditioner outdoor units, which will not be described in detail here.

[0128] Optionally, the air conditioner is a wall-mounted air conditioner, a duct air conditioner, or a cabinet air conditioner.

[0129] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An air outlet grille, suitable for installation on the air outlet side of an axial flow fan, characterized in that: The air outlet grille includes: A center plate, adapted to be connected to an axial flow fan; There are a plurality of first ribs, and the plurality of first ribs are sequentially spaced apart on the outer side of the center plate along the circumference of the center plate; The first ribs extend in the radial direction of the air outlet grille, and are curved. The bending direction of the first ribs is suitable to be opposite to the bending direction of the blades of the axial flow fan.

2. The air outlet grille according to claim 1, characterized in that: Along the direction from the center plate to the outer edge of the air outlet grille, the distance between adjacent first ribs increases; and / or, The number of the first ribs is suitable to be greater than or equal to the number of the blades of the axial flow fan.

3. The air outlet grille according to claim 1, characterized in that: The bending angle of the first rib relative to the radial direction of the air outlet grille is suitable to be consistent with the bending angle of the blades of the axial flow fan.

4. The air outlet grille according to claim 1, characterized in that: The length of the first rib along the flow direction of the airflow is greater than 8 mm.

5. The air outlet grille according to claim 1, characterized in that: Along the flow direction of the airflow, the thickness of the first rib gradually decreases, wherein the thickness of the first rib refers to the dimension of the first rib perpendicular to the flow direction of the airflow.

6. The air outlet grille according to claim 1, characterized in that: The thickness of the first rib y=-0.012x 2 -0.06x+4, wherein x is the length of the first rib along the airflow direction.

7. The air outlet grille according to claim 1, characterized in that: Also includes: The second rib is annular and connected between the plurality of first ribs; There are multiple second ribs, and the multiple second ribs are arranged in sequence and at intervals along the direction from the center plate to the outer edge of the air outlet grille.

8. The air outlet grille according to any one of claims 1 to 7, characterized in that: Also includes: A grid frame is arranged at intervals on the outer side of the center plate, and the first rib is connected between the grid frame and the center plate; Wherein, the grid frame is provided with a mounting portion, and the mounting portion is suitable for connecting with an external component; and / or, The center plate is configured with a connection portion, and the connection portion is suitable for being detachably connected to the axial flow fan.

9. An air conditioner outdoor unit, characterized in that: It comprises the air outlet grille as claimed in any one of claims 1 to 8.

10. The air conditioner outdoor unit according to claim 9, characterized in that: Also includes: The housing defines a fan cavity having an air outlet, and the air outlet grille is arranged at the air outlet; An axial flow fan is located in the fan cavity and includes a fan blade portion and an outer rotor motor; One end of the outer rotor motor is connected to the connecting portion of the center plate.

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