Air outlet mesh enclosure and air conditioner outdoor unit comprising same

Abstract

The invention discloses an air outlet mesh enclosure and an air conditioner outdoor unit comprising the same. The air outlet mesh enclosure is used for being connected to the outer side of the fan so as to guide the air outlet direction of the fan. The air outlet mesh enclosure comprises a center disc, a frame and a plurality of radial ribs. According to the air outlet mesh enclosure, the radial ribs are arranged to be of the structure that the exhaust channel obliquely extends on the air inlet side in the air outlet direction of the draught fan, and when airflow exhausted from the draught fan enters the exhaust channel, part of dynamic pressure of the airflow is converted into static pressure, so that the flow speed of the air outlet airflow is reduced, and the air outlet efficiency is improved. The air outlet flow is improved; and the noise during air outlet is reduced.

Description

Technical Field

[0001] The present application relates to the field of air conditioning systems, and in particular to an air outlet mesh cover and an air conditioning outdoor unit including the same. Background Art

[0002] The air conditioner outdoor unit includes a fan and an air outlet grille. The fan drives the hot air inside the air conditioner outdoor unit to flow outward through the air outlet grille to cool the components inside the air conditioner outdoor unit, such as the condenser and the compressor. The fan is generally an axial flow fan, including a hub and a plurality of blades arranged around the hub. The blades can rotate to drive the air flow to flow from the inside to the outside along the axial direction. The air outlet grille is arranged on the outside of the fan to guide the flow direction of the air flow discharged from the fan and protect the fan. Summary of the invention

[0003] At least one purpose of the first aspect of the present application is to provide an air outlet grille, which is used to be connected to one side of a fan to guide the air outlet direction of the fan. The air outlet grille includes a central disk, a frame and a plurality of radial ribs. The central disk is arranged in the middle of the air outlet grille. The frame is arranged at the outer edge of the air outlet grille. The plurality of radial ribs are arranged radially from the central disk to the frame, and each of the radial ribs is connected between the central disk and the frame, wherein the air outlet grille has an exhaust channel, an air outlet side and an air inlet side, the exhaust channel is at least partially defined by adjacent radial ribs, and the exhaust channel is configured to guide the airflow discharged from the fan to flow from the air inlet side to the air outlet side through the exhaust channel. Wherein, the radial ribs are configured so that the exhaust channel extends obliquely along the air outlet direction of the fan on the air inlet side.

[0004] According to the first aspect, the radial ribs include a pair of radial rib side walls, and the radial rib side walls of adjacent radial ribs define a portion of the exhaust passage, wherein the radial ribs include a radial rib bottom and a radial rib top connected to each other, the radial rib bottom faces the air inlet side, and the radial rib top faces the air outlet side. The radial rib side walls of each radial rib bottom are configured to extend obliquely along the air outlet direction of the fan.

[0005] According to the first aspect, the air outlet grille has an axis, and the air outlet grille is symmetrical with respect to the axis. Each of the radial ribs has a center line, and each of the radial ribs is symmetrical with respect to the center line. The radial ribs are arranged so that the angle between the center line of the bottom of the radial ribs and the axis is consistent with the air outlet angle of the fan.

[0006] According to the above first aspect, the center line of the top of the radial rib is parallel to the axis.

[0007] According to the first aspect above, the radial ribs are streamlined, and the top of the radial ribs and the bottom of the radial ribs are smoothly connected.

[0008] According to the first aspect above, a pair of radial rib side walls at the bottom of the radial rib are smoothly connected.

[0009] According to the above first aspect, the air outlet mesh cover also includes a plurality of circumferential ribs, each of which is in a concentric ring shape surrounding the center disk, and the plurality of circumferential ribs are arranged at intervals, and each of the circumferential ribs is connected to at least a portion of the plurality of radial ribs.

[0010] According to the first aspect above, in the axial direction of the air outlet grille, the circumferential ribs and the radial ribs are arranged in layers so that the circumferential ribs and the radial ribs partially overlap, wherein the circumferential ribs extend in the axial direction.

[0011] In a second aspect, the present application provides an air conditioner outdoor unit, comprising a fan and an air outlet grille as described in any one of the first aspects, wherein the air outlet grille is connected to one side of the fan to guide the airflow discharged from the fan to flow from the air inlet side to the air outlet side through the exhaust channel.

[0012] According to the second aspect, the fan comprises a hub, wherein the maximum diameter of the central disk of the air outlet grille is 1.01 to 1.3 times the diameter of the hub.

[0013] By considering the following specific embodiments, drawings and claims, other features, advantages and embodiments of the present application can be set forth or become apparent. In addition, it should be understood that the above-mentioned summary of the invention and the following specific embodiments are exemplary and are intended to provide further explanations without limiting the scope of the present application for protection. However, the specific embodiments and specific examples only indicate preferred embodiments of the present application. For those skilled in the art, various changes and modifications within the spirit and scope of the present application will become apparent through the specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A is a three-dimensional structural diagram of an air outlet grille according to an embodiment of the present application;

[0015] Figure 1B for Figure 1A A top view of the air outlet grille is shown;

[0016] Figure 2A for Figure 1B The three-dimensional cross-sectional view of the air outlet grille along line AA is shown;

[0017] Figure 2B for Figure 2A A cross-sectional view of the wind screen and the fan is shown;

[0018] Figure 3 for Figure 1A A schematic cross-sectional view of an embodiment of a radial rib in FIG.

[0019] Figure 4 for Figure 1A A cross-sectional schematic diagram of another embodiment of the radial ribs;

[0020] Figure 5A is a three-dimensional structural diagram of an air-conditioning outdoor unit according to an embodiment of the present application;

[0021] Figure 5B for Figure 5A The partial structural diagram of the air conditioner outdoor unit shown;

[0022] Figure 6 is a cross-sectional view of an air outlet grille according to another embodiment of the present application;

[0023] Figure 7 is a cross-sectional view of an air outlet grille according to yet another embodiment of the present application;

[0024] Fig. 8A The turbulence intensity effect diagram of the air outlet grille of the comparative example;

[0025] Figure 8B for Figure 2B The turbulence intensity effect diagram of the air outlet grille shown;

[0026] Fig. 9A This is a backflow effect diagram of the air outlet grille of the comparative example;

[0027] Fig. 9B for Figure 2B The backflow effect diagram of the air outlet grille shown;

[0028] Fig. 10A is a three-dimensional structural diagram of an air outlet grille according to another embodiment of the present application;

[0029] Fig. 10B for Fig. 10A A cross-sectional view of the wind screen is shown. DETAILED DESCRIPTION

[0030] Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form a part of this specification. It should be understood that although terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "top", "bottom", etc., are used in this application to describe various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the accompanying drawings. Since the embodiments disclosed in the present application can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0031] Figure 1A and Figure 1B This is a structural diagram of an embodiment of the air outlet mesh cover 100 of the present application, which is used to show the general structure of the air outlet mesh cover 100, wherein Figure 1A is a three-dimensional structural diagram of the air outlet grille 100, Figure 1B FIG. 1 is a top view of the air outlet grille 100. In the embodiment of the present application, the fan 220 (see FIG. Figure 2B 200 is an axial flow fan, which has an axial direction. The air outlet grille 100 has an axial direction, and the height direction of the air outlet grille 100 is its axial direction in the application. The axial direction of the air outlet grille 100 is consistent with the axial direction of the fan 220.

[0032] like Figure 1A and Figure 1B As shown, the air outlet grille 100 has an air inlet side 105 and an air outlet side 106 on opposite sides of the axial direction thereof, and an exhaust passage 108 connecting the air inlet side 105 and the air outlet side 106. Figure 1A At the angle shown, the air inlet side 105 is arranged below the air outlet mesh cover 100, the air outlet side 106 is arranged above the air outlet mesh cover 100, and the fan 220 is connected below the air outlet mesh cover 100. The air outlet mesh cover 100 guides the airflow discharged from the fan 220 to flow from the air inlet side 105 along the exhaust channel 108 to the air outlet side 106.

[0033] The air outlet mesh cover 100 includes a central disk 102, a frame 101, a plurality of radial ribs 104 and a plurality of circumferential ribs 103. The central disk 102 is disposed in the middle of the air outlet mesh cover 100, and the central disk 102 is in the shape of a circular disk perpendicular to the axial direction. The frame 101 is disposed at the outer edge of the air outlet mesh cover 100. A plurality of radial ribs 104 are radially arranged from the central disk 102 to the frame 101. Each radial rib 104 is in the shape of a curved long strip extending roughly in the radial direction, one end of which is connected to the central disk 102, and the other end is connected to the frame 101. The bending direction of the radial rib 104 is the same as the rotation direction of the blades 221 of the fan 220. As a specific example, as in Figure 1BIn the fan 220 matched with the air outlet grille 100 shown, the blades 221 rotate in the counterclockwise direction. Several circumferential ribs 103 are in a concentric ring shape extending circumferentially around the central disk 102, and each circumferential rib 103 is arranged at a certain distance. Each circumferential rib 103 is fixed by connecting to at least a portion of the radial ribs 104 of several radial ribs 104. In this embodiment, several circumferential ribs 103 have the same axial height and are aligned in the axial direction, and several radial ribs 104 also have the same axial height and are aligned in the axial direction.

[0034] In the present embodiment, the frame 101 limits the outer edge of the air outlet mesh cover 100, and the frame 101 is roughly in the shape of an axisymmetric fisheye. It can be understood by those skilled in the art that, based on the specific shape of the frame 101, the circumferential ribs 103 of the inner ring are connected to each radial rib 104, and the circumferential ribs 103 of the outer ring are fixed by connecting to the frame 101 or connecting to part of the radial ribs 104 and the frame 101 at the same time. In other embodiments, the frame 101 may not be a symmetrical shape, as long as it can cover the air outlet range of the fan. Accordingly, the radial ribs 104 are connected between the center disk 102 and the frame 101, and the circumferential ribs 103 are connected to the radial ribs 104, the frame 101, or the frame 101 and part of the radial ribs 104.

[0035] Thus, the plurality of circumferential ribs 103 and the plurality of radial ribs 104 are arranged roughly in a grid shape, and exhaust passages 108 are defined between adjacent radial ribs 104 and between adjacent circumferential ribs 103 .

[0036] Figure 2A and Figure 2B A cross-sectional view of the air outlet grille 100 along line AA is shown to illustrate the more specific structure of the circumferential ribs 103 and the radial ribs 104. Figure 2A and Figure 2B As shown, the fan 220 is an axial flow fan, including a hub 210 and a plurality of blades 221, the roots of the blades 221 being connected to the hub 210. When the fan 220 is working, the blades 221 rotate around the hub 210 to drive the air flow from the air inlet side 105 of the air outlet grille 100 to the air outlet side 106 (i.e. Figure 2B In this embodiment, the air outlet grille 100 and the wheel hub 210 have a common axis x, and the air outlet grille 100 and the wheel hub 210 are symmetrical with respect to the axis x.

[0037] In this embodiment, the circumferential ribs 103 and the radial ribs 104 partially overlap or do not completely overlap in the axial direction, the circumferential ribs 103 face the air outlet side 106, and the radial ribs 104 face the air inlet side 105. As a result, the airflow discharged from the fan 220 and flowing through the exhaust channel 108 of the air outlet mesh cover 100 can first flow through the radial ribs 104 and then flow through the circumferential ribs 103. In other words, in at least a part of the flow path of the airflow flowing through the exhaust channel 108, only the circumferential ribs 103 or only the radial ribs 104 are included. Since the airflow will be blocked by the circumferential ribs 103 and the radial ribs 104 when flowing through the exhaust channel 108, such a setting can increase the flow area of ​​the airflow and reduce the flow speed of the airflow, thereby reducing the turbulence intensity of the airflow and reducing the local pressure loss of the airflow.

[0038] Specifically, each radial rib 104 includes a plurality of overlapping portions 244, which are arranged at intervals on the top of the radial rib 104 (ie, Figure 2B The circumferential rib 103 overlaps with the radial rib 104 at each overlapping portion 244, so that the circumferential rib 103 can be connected to the radial rib 104, thereby ensuring the connection strength of the circumferential rib 103. In some embodiments, the overlapping portion 244 is in the shape of a groove, which is used to accommodate the bottom of the circumferential rib 103 and is fixedly connected to the bottom of the circumferential rib 103 by welding or the like. The axial height of the overlapping portion 244 can be set according to specific needs. For example, the greater the axial height of the overlapping portion 244, the greater the connection strength between the circumferential rib 103 and the radial rib 104. The smaller the axial height of the overlapping portion 244, the smaller the flow distance of the airflow flowing through the circumferential rib 103 and the radial rib 104 at the same time, and the better the effect of reducing the turbulence intensity and local pressure loss of the airflow. Within the overall axial height limit of the air outlet grille 100, the axial height of the overlapping portion 244 is set as small as possible while ensuring the connection strength of the circumferential ribs 103 and the radial ribs 104. In some specific embodiments, the axial height of each overlapping portion 244 is substantially the same, and the axial height is 0.5 to 6 mm. In some specific embodiments, the axial height of each overlapping portion 244 is 2 to 5 mm.

[0039] In this embodiment, the exhaust passage 108 is configured such that the air inlet angle on the air inlet side 105 is consistent with the air outlet angle of the fan 220, and the air outlet angle on the air outlet side 106 is parallel to the axial direction. Thus, the airflow discharged from the fan 220 first flows along the air outlet angle of the fan 220 in the exhaust passage 108, and then is discharged from the air outlet mesh cover 100 along the axial direction. This configuration can facilitate the conversion of a portion of the dynamic pressure of the airflow discharged from the fan 220 into static pressure, thereby reducing the flow velocity of the airflow discharged from the air outlet mesh cover 100 and increasing the flow rate of the airflow, and reducing the noise of the airflow.

[0040] As an example, the radial ribs 104 are arranged so that the exhaust channel 108 extends obliquely along the outlet direction of the fan 220 at the air inlet side 105. And the circumferential ribs 103 are arranged so that the exhaust channel 108 extends obliquely along the axial direction at the outlet side 106. Specifically, each radial rib 104 includes a radial rib bottom 213 and a radial rib top 214 connected to each other. The radial rib bottom 213 is located at the bottom of the radial rib 104 and is arranged toward the air inlet side 105. The radial rib top 214 is located at the top of the radial rib 104 and is arranged toward the outlet side 106. In this embodiment, the radial rib top 214 extends axially and forms an overlapping portion 244. The radial rib bottom 213 extends obliquely approximately along the outlet direction of the fan. The greater the axial height of the radial rib 104, the smoother the transition connection between the radial rib top 214 and the bottom of the radial rib bottom 213, so that a part of the dynamic pressure of the airflow can be more effectively converted into static pressure. More specifically, each radial rib 104 includes a pair of radial rib side walls 211, and the radial rib side walls 211 of adjacent radial ribs 104 define a portion of the exhaust passage 108. Therefore, when the airflow discharged from the fan 220 enters the exhaust passage 108, it first flows along the radial rib side walls 211 of the radial rib bottom 213.

[0041] The radial rib side wall 211 of each radial rib bottom 213 is configured to extend obliquely along the air outlet direction of the fan 220, so that when the airflow enters the exhaust channel 108, the dynamic pressure of the airflow can be converted into static pressure, thereby increasing the air flow rate and reducing the noise during the air outlet. The radial rib side wall 211 of each radial rib top 214 is configured to extend in the axial direction. As an example, each radial rib 104 is a streamline shape, and the radial rib side wall 211 of the radial rib top 214 and the radial rib side wall 211 of the radial rib bottom 213 are smoothly connected, and the pair of radial rib side walls 211 of the radial rib bottom 213 are also smoothly connected. This can better reduce the pressure loss of the airflow during the flow process. As some specific examples, the cross-sectional shape of the radial rib 104 can be a circular arc or elliptical shape with uniform thickness, or a wing shape with uneven thickness. The more specific shape of the radial rib 104 will be described later in conjunction with Figure 3 and Figure 4 Two embodiments are shown and described.

[0042] The center disk 102 is generally disk-shaped, and includes a disk bottom 231 and a disk top opening 233 that are oppositely disposed, and a disk side portion 232 that surrounds and is connected to the disk bottom 231. The disk bottom 231 faces the air inlet side 105, the disk top opening 233 faces the air outlet side 106, and the disk side portion 232 extends from the disk bottom 231 toward the air outlet side 106. The disk top opening 233 is defined at the top edge 235 of the disk side portion 232. The ends of each radial rib 104 are connected to the disk side portion 232 of the center disk 102.

[0043] As an example, the disk side portion 232 extends outwardly in a direction from bottom to top toward the air outlet side 106, for example, smoothly extends outwardly, so that the diameter of the disk top opening 233 is greater than the diameter of the disk bottom 231, and the maximum diameter D1 of the center disk 102 is formed at the top edge 235 of the disk side portion 232. In this embodiment, the maximum diameter D1 of the center disk 102 is 1.01 to 1.3 times the diameter D2 of the hub 210 of the fan 220.

[0044] The applicant found that since high-pressure airflow is blown out from the outlet area of ​​the blade 221, and there is no blade work at the center of the hub 210, a low-pressure area will be formed between the hub 210 and the center disk 102. If the maximum diameter of the center disk 102 is equal to or less than the diameter of the hub 210 of the fan 220, the high-pressure airflow will directly flow back to the low-pressure direction. There is a vortex between the high-pressure airflow and the low-pressure return flow, which not only dissipates energy, increases turbulence intensity, increases power consumption, but also increases the noise of the fan 220. In addition, the low-pressure return flow also increases the work done by the motor, destroying the load acting on the root of the blade 221.

[0045] In the present application, the top opening 233 of the center disk 102 is set at the outer side away from the hub 210, and the maximum diameter D1 of the center disk 102 is set to 1.01 to 1.3 times the diameter D2 of the hub 210 of the fan 220, so that the center disk 102 can effectively block the low-pressure backflow on one side of the top opening 233 of the disk, reducing the negative impact of the low-pressure backflow on the work of the blade 221. And because the side portion 232 of the disk is a smooth streamline shape, the high-pressure airflow can be better guided to flow out along the side portion 232 of the disk, thereby reducing the turbulence intensity near the blade 221. Therefore, the air outlet mesh cover 100 can improve the performance of the fan 220 while reducing the noise. And the maximum diameter D1 of the center disk 102 is set to 1.01 to 1.3 times the diameter D2 of the hub 210 of the fan 220, and the air outlet area will not be reduced or the flow of high-pressure airflow will not be blocked due to the excessive size of the center disk 102.

[0046] As an embodiment, the disk side portion 232 is streamlined, and the disk side portion 232 is smoothly connected to the disk bottom portion 231, and such a configuration can facilitate the high-pressure airflow to flow along the disk side portion 232. As a specific embodiment, the center disk 102 is in the shape of a frying pan, the disk bottom 231 is in the shape of a flat plate, and the disk side portion 232 is in a smooth arc shape. Such a configuration is conducive to the ends of the radial ribs 104 being firmly connected to the disk side portion 232, and such a configuration can guide the high-pressure airflow to flow. In other embodiments, the center disk may also be in other streamlined shapes such as a bowl shape. It will be understood by those skilled in the art that in some embodiments, the center disk may be configured as a flat plate shape, that is, only including the disk bottom but not including the disk top opening and the disk side portion, as long as the maximum diameter of the center disk meets the requirements.

[0047] Therefore, by arranging the circumferential ribs 103 and the radial ribs 104 to have an incompletely overlapping structure in the axial direction, so that at least a portion of the flow path of the airflow passing through the exhaust channel 108 only includes the circumferential ribs 103 or only includes the radial ribs 104, the flow area of ​​the airflow discharged from the fan can be increased, the flow velocity of the airflow can be reduced, thereby reducing the turbulence intensity of the airflow and reducing the local pressure loss of the airflow.

[0048] By arranging the radial ribs 104 to have a structure in which the exhaust passage 108 extends obliquely along the air outlet direction of the fan 220 on the air inlet side 105, a portion of the dynamic pressure of the airflow discharged from the fan can be converted into static pressure when entering the exhaust passage 108, thereby reducing the flow velocity of the outlet airflow, increasing the outlet air flow rate and reducing the noise during air outlet.

[0049] Furthermore, by setting the maximum diameter D1 of the center disk 102 to 1.01 to 1.3 times the diameter D2 of the hub 210 of the fan 220, the low-pressure backflow can be effectively blocked, the negative impact of the backflow on the work of the blades 221 can be reduced, and the turbulence intensity at the root of the blades 221 can be reduced, thereby improving the performance of the fan 220 and reducing the noise. In addition, the flow of high-pressure airflow will not be blocked due to the excessive size of the center disk 102.

[0050] Those skilled in the art can understand that, although in the present embodiment, the air outlet grille includes the above structural features, the structures of these air outlet grilles can also be used separately.

[0051] Figure 3 and Figure 4 Schematic cross-sectional views of two embodiments of the radial ribs 104 are shown. Figure 3 The embodiment in which the cross-sectional shape of the radial rib 304 is a circular arc with uniform thickness is shown. Figure 4 The embodiment of the radial rib 404 is shown in which the cross-sectional shape is an airfoil shape with uneven thickness. Figure 3As shown, the radial rib 304 has a radial rib top 314, a radial rib bottom 313, and a pair of radial rib side walls 311a and 311b. The radial rib side wall 311a of each radial rib 304 and the radial rib side wall 311b of the adjacent radial rib 304 are spaced to form a part of the exhaust passage 108. The pair of radial rib side walls 311a and 311b are smoothly connected, and the radial rib top 314 and the radial rib bottom 313 are smoothly connected to reduce the pressure loss of the airflow.

[0052] Each radial rib 304 has a center line i, and the radial ribs 304 are symmetrically arranged with respect to the center line i. The center line i of the top 314 of the radial rib is parallel to the axis x, and there is an angle θ between the center line i of the bottom 313 of the radial rib and the axis x, and the angle θ is consistent with the air outlet angle of the fan 220. In this embodiment, the cross-sectional shape of the radial rib 304 is a circular arc with uniform thickness, so a pair of radial rib side walls 311a and 311b are roughly parallel and the extension direction is roughly consistent with the direction of the center line i. In other words, the angle between the bottom of a pair of radial rib side walls 311a and 311b and the axis x is roughly consistent with the air outlet angle of the fan 220.

[0053] like Figure 4 As shown, similar to the radial rib 304, the radial rib 404 has a radial rib top 414, a radial rib bottom 413, and a pair of radial rib side walls 411a and 411b. The radial rib side wall 411a of each radial rib 404 and the radial rib side wall 411b of the adjacent radial rib 404 are spaced apart to form a portion of the exhaust passage 108. The pair of radial rib side walls 411a and 411b are smoothly connected, and the radial rib top 414 and the radial rib bottom 413 are smoothly connected to reduce the pressure loss of the airflow.

[0054] Each radial rib 404 has a center line i, and the radial ribs 404 are symmetrically arranged relative to the center line i. The center line i of the top 414 of the radial rib is parallel to the axis x, and there is an angle θ between the center line i of the bottom 413 of the radial rib and the axis x, and the angle θ is consistent with the air outlet angle of the fan 220. Unlike the radial rib 304, the cross-sectional shape of the radial rib 404 is not an arc shape with uniform thickness, but an airfoil shape with gradually increasing thickness from top to bottom. Therefore, a pair of radial rib side walls 411a and 411b gradually move away from the center line i from top to bottom. In other words, the extension direction of each radial rib side wall 411a and 411b is not completely consistent with the direction of the center line i. In this embodiment, although the angle between the bottom of the radial rib side walls 411a and 411b and the axis x is not completely consistent with the air outlet angle θ, the bottom of the radial rib side walls 411a and 411b also extends obliquely along the air outlet direction, and can also play a role in converting the dynamic pressure of the airflow entering the exhaust channel 108 into static pressure.

[0055] Figure 5A and Figure 5B The general structure of an air conditioner outdoor unit 550 including the air outlet grille 100 of the present application is shown. Figure 5A The external structure of the air conditioner outdoor unit 550 is shown. Figure 5B FIG. 5 shows the structure of the air conditioner outdoor unit 550 without the air outlet grille 100 and the blades 221. Figure 5A and Figure 5B As shown, the air conditioner outdoor unit 550 includes a housing 551 and an air outlet mesh cover 100 connected to the housing 551. The housing 551 is in the shape of a rectangular parallelepiped and has a cavity 558 therein. The cavity 558 can accommodate the fan 220 and some equipment of the air conditioning system, such as a compressor, a condenser, etc. The cavity 558 forms an air outlet 556 on the front panel 552 of the housing 551, and the air outlet mesh cover 100 covers the outside of the air outlet 556 and is connected to the front panel 552. The fan 220 is arranged on the inner side of the air outlet 556 to drive the gas in the cavity 558 to pass through the air outlet 556 and then be discharged from the air outlet mesh cover 100.

[0056] Figure 6 and Figure 7 The cross-sectional views of two embodiments of the air outlet grille are shown, wherein Figure 6 and Figure 7 The difference between the air outlet grille 600 and the air outlet grille 700 shown in the figure and the air outlet grille 100 is that the structure of the central plate is different. Figure 6As shown, the center disk 602 is no longer in the shape of a pan, but in the shape of a bowl. The bottom 631 of the center disk 602 is in the shape of a round bottom, and the side 632 of the disk is in the shape of a smooth arc. The top edge 635 of the side 632 of the disk defines a disk top opening 633. In this embodiment, the top edge 635 of the side 632 of the disk forms a maximum diameter, which is 1.01 to 1.3 times the diameter of the hub. Several radial ribs 604 are connected to the arc-shaped side 632 of the disk. Several circumferential ribs 603 are arranged on the outside of the top edge 635 around the top opening 633 of the disk.

[0057] like Figure 7 As shown, the center disk 702 is bowl-shaped similar to the center disk 602, and also has a disk bottom 731 with a round bottom shape and a disk side portion 732 with a smooth arc shape. The top edge 735 of the disk side portion 732 defines a disk top opening 733. In this embodiment, the top edge 735 of the disk side portion 732 forms a maximum diameter, and the maximum diameter is 1.01 to 1.3 times the hub diameter. Several circumferential ribs 703 are arranged on the outside of the top edge 735 around the disk top opening 733. Different from the center disk 602, the center disk 702 also includes a folded edge 737, which is folded downward from the top edge 735 of the disk side portion 732. Several radial ribs 704 are connected to the folded edge 737 of the center disk 702.

[0058] Compared with the central disk 602, the folded edge extending vertically downward of the central disk 702 is more convenient to connect with the radial ribs than the arc-shaped disk side portion, for example, by welding and other processing techniques, and the connection structure is also more stable. However, the arc-shaped wall is more conducive to guiding the flow of the airflow on the air inlet side 105. The connection strength between the disk side portion 232 of the pan-shaped central disk 102 and the radial ribs 104 is also good, and it can also well guide the flow of the airflow on the air inlet side 105.

[0059] Fig. 8A and Figure 8B The following is a comparison of the turbulence intensity near the center disk of the air outlet grille 100 and the comparative air outlet grille under the same fan conditions. Fig. 8A A turbulence intensity effect diagram of the air outlet grille of the comparative example near the central disk is shown, wherein the maximum diameter of the central disk of the air outlet grille of the comparative example is smaller than the diameter of the hub. Figure 8B The turbulence intensity effect diagram of the air outlet grille 100 near the center disk is shown, wherein the maximum diameter D1 of the center disk 102 of the air outlet grille 100 is 1.01 to 1.3 times the diameter D2 of the hub 210. Fig. 8A and Figure 8B As shown, the central disk 102 of the air outlet grille 100 can guide the flow of high-pressure airflow through the side of the disk, and significantly reduces the turbulence intensity compared to the air outlet grille of the comparative example.

[0060] Fig. 9A and Fig. 9B The figure shows the comparison of the backflow effect near the center disk between the air outlet grille 100 and the comparative air outlet grille under the same fan conditions. Fig. 9A A diagram showing the backflow effect of the air outlet grille of the comparative example near the central disk is shown, wherein the maximum diameter of the central disk of the air outlet grille of the comparative example is smaller than the diameter of the hub. Fig. 9B The backflow effect diagram of the air outlet grille 100 near the center disk is shown, wherein the maximum diameter D1 of the center disk 102 of the air outlet grille 100 is 1.01 to 1.3 times the diameter D2 of the hub 210. Fig. 9A and Fig. 9B As shown, the central disk 102 of the air outlet grille 100 can block the backflow of the low-pressure airflow through the top opening of the disk, so that the low-pressure backflow cannot affect the blades. Compared with the air outlet grille of the comparative example, the air outlet grille 100 significantly reduces the low-pressure backflow.

[0061] In addition, when the air outlet grille 100 and the air outlet grille of the comparative example are compared under the same fan conditions, the static pressure is significantly improved under the same air volume, and the sound pressure (reflecting the noise level) is significantly reduced.

[0062] Fig. 10A and Fig. 10B FIG. 1 shows the structure of an air outlet grille 1000 according to another embodiment of the present application. Fig. 10A is a three-dimensional diagram of the air outlet grille 1000. Fig. 10B FIG. 1 is a cross-sectional view of the air outlet grille 1000. Fig. 10A and Fig. 10B As shown, the air outlet grille 1000 has an air inlet side 1005 and an air outlet side 1006 on opposite sides of the axial direction. The fan is used to be connected below the air outlet grille 1000 so that the air outlet grille 1000 guides the airflow discharged from the fan to flow from the air inlet side 1005 to the air outlet side 1006.

[0063] The general structure of the air outlet mesh cover 1000 is the same as that of the air outlet mesh cover 100, and also includes a central disk 1002, a frame 1001, several radial ribs 1004 and several circumferential ribs 1003. Several radial ribs 1004 are arranged radially from the central disk 1002 to the frame 1001. Several circumferential ribs 1003 are in a concentric ring shape extending circumferentially around the central disk 1002, and each circumferential rib 1003 is arranged at a certain distance. Thus, several circumferential ribs 1003 and several radial ribs 1004 are arranged roughly in a grid shape. And in this embodiment, the circumferential ribs 1003 and the radial ribs 1004 do not completely overlap in the axial direction. The radial ribs 1004 include several overlapping portions 1044, and the circumferential ribs 1003 overlap with the radial ribs 1004 at each overlapping portion 1044. The axial height of each overlapping portion 1044 is roughly the same.

[0064] Unlike the air outlet grille 100, in the present embodiment, in the direction from the center disk 1002 to the frame 1001, the radial ribs 1004 no longer extend in the radial direction, but are inclined relative to a plane perpendicular to the axial direction. As an example, the radial ribs 1004 extend obliquely from the air inlet side 1005 toward the air outlet side 1006, or extend obliquely from the air outlet side 1006 toward the air inlet side 1005. Correspondingly, each circumferential rib 1003 is also arranged staggered along the axial direction. That is, in the direction from the center disk 1002 to the frame 1001, each circumferential rib 1003 is arranged to gradually move away from the fan or gradually approach the fan. In some embodiments, the line 1045 connecting the center points of each circumferential rib 103 can be an oblique straight line, an arc, or a combination of an oblique straight line and an arc, as long as the number of ribs can be reduced compared to the number of the air outlet grille 100 on at least part of the axial cross section (i.e., the cross section perpendicular to the axial direction).

[0065] Therefore, on the same axial section, the number of circumferential ribs 1003 and / or radial ribs 1004 is further reduced compared to the air outlet mesh cover 100, so that on the flow path of the airflow discharged from the fan, the number of circumferential ribs 1003 and / or radial ribs 1004 through which the airflow flows is smaller, thereby further increasing the flow area of ​​the airflow.

[0066] As a specific example, the plurality of circumferential ribs include an innermost circumferential rib 1003a and an outermost circumferential rib 1003b. The innermost circumferential rib 1003a is close to the center disk 1002, and the outermost circumferential rib 1003b is close to the frame 1001. The difference H0 in the axial height between the innermost circumferential rib 1003a and the outermost circumferential rib 1003b is 0.6 to 0.95 of the total axial height H1 of the air outlet grille 1000. The inclination angle of the center line connecting the innermost circumferential rib 1003a and the outermost circumferential rib 1003b compared to the axial section can be set according to specific needs. The smaller the inclination angle, the smaller the overall axial height of the air outlet grille 1000, and the larger the inclination angle, the larger the flow area of ​​the air flow. The maximum inclination angle is determined by the size limit of the air conditioner outdoor unit, and those skilled in the art can obtain a suitable inclination angle according to the specific size requirements of the air conditioner outdoor unit.

[0067] Therefore, in the present embodiment, the air outlet mesh cover 1000 improves the air outlet area in three-dimensional space, and can have a larger gas flow area, a lower air flow velocity, and a lower turbulence intensity compared to the air outlet mesh cover 100 .

[0068] The air outlet mesh cover of the present application is configured with radial ribs so that the exhaust channel extends obliquely along the air outlet direction of the fan on the air inlet side. This enables a portion of the dynamic pressure of the airflow discharged from the fan to be converted into static pressure when the airflow enters the exhaust channel, thereby reducing the flow rate of the airflow discharged from the air outlet mesh cover, increasing the flow rate of the airflow, and reducing the noise of the airflow.

[0069] In addition, each radial rib of the present invention is streamlined, and the radial rib side wall at the top of the radial rib and the radial rib side wall at the bottom of the radial rib are smoothly connected, and a pair of radial rib side walls at the bottom of the radial rib are also smoothly connected. This can better reduce the pressure loss of the airflow during the flow process.

[0070] Although the present disclosure has been described in conjunction with the examples of the embodiments summarized above, it is obvious to those of ordinary skill in the art that various alternatives, modifications, variations, improvements and / or substantially equivalent solutions, whether known or now or foreseeable in the near future, may be apparent. Therefore, the examples of the embodiments of the present disclosure as stated above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, variations, improvements and / or substantially equivalent solutions. The technical effects and technical problems in this specification are exemplary rather than restrictive. It should be noted that the embodiments described in this specification may have other technical effects and may solve other technical problems.

Claims

1. An air outlet mesh cover, the air outlet mesh cover (100) is used to be connected to one side of a fan (220) to guide the air outlet direction of the fan (220), characterized in that The air outlet mesh cover (100) comprises: A central disk (102), wherein the central disk (102) is arranged in the middle of the air outlet mesh cover (100); A frame (101), wherein the frame (101) is arranged on the outer edge of the air outlet mesh cover (100); and a plurality of radial ribs (104), the plurality of radial ribs (104) being arranged radially from the central disk (102) to the frame (101), and each of the radial ribs (104) being connected between the central disk (102) and the frame (101), wherein the air outlet mesh cover (100) has an exhaust passage (108), an air outlet side (106) and an air inlet side (105), the exhaust passage (108) being at least partially defined by adjacent radial ribs (104), and the exhaust passage (108) being configured to guide the airflow exhausted from the fan (220) to flow from the air inlet side (105) to the air outlet side (106) through the exhaust passage (108); The radial ribs (104) are arranged so that the exhaust passage (108) extends obliquely along the air outlet direction of the fan (220) on the air inlet side (105).

2. The air outlet grille according to claim 1, characterized in that: The radial rib (104) comprises a pair of radial rib side walls (211), and the radial rib side walls (211) of adjacent radial ribs (104) define a portion of the exhaust passage (108), wherein the radial rib (104) comprises a radial rib bottom (213) and a radial rib top (214) connected to each other, the radial rib bottom (213) faces the air inlet side (105), and the radial rib top (214) faces the air outlet side (106); The radial rib side wall (211) of each radial rib bottom (213) is arranged to extend obliquely along the air outlet direction of the fan (220).

3. The air outlet grille according to claim 2, characterized in that: The air outlet mesh cover (100) has an axis (x), and the air outlet mesh cover (100) is symmetrical relative to the axis (x); Each of the radial ribs (104) has a center line (i), and each of the radial ribs (104) is symmetrical with respect to the center line (i); The radial ribs (104) are arranged such that the angle (θ) between the center line (i) of the bottom (213) of the radial ribs and the axis (x) is consistent with the air outlet angle of the fan (220).

4. The air outlet grille according to claim 3, characterized in that: The center line (i) of the radial rib top (214) is parallel to the axis (x).

5. The air outlet grille according to claim 3, characterized in that: The radial rib (104) is in a streamline shape, and the radial rib top (214) and the radial rib bottom (213) are smoothly connected.

6. The air outlet grille according to claim 3, characterized in that: A pair of radial rib side walls (211) of the radial rib bottom (213) are smoothly connected.

7. The air outlet grille according to claim 1, characterized in that: The air outlet mesh cover (100) further comprises a plurality of circumferential ribs (103), each of the circumferential ribs (103) being in a concentric ring shape surrounding the central disk (102), and the plurality of circumferential ribs (103) being arranged at intervals, and each of the circumferential ribs (103) being connected to at least a portion of the radial ribs (104) among the plurality of radial ribs (104).

8. The air outlet grille according to claim 7, characterized in that: In the axial direction of the air outlet mesh cover (100), the circumferential ribs (103) and the radial ribs (104) are arranged in layers so that the circumferential ribs (103) and the radial ribs (104) partially overlap, wherein the circumferential ribs (103) extend in the axial direction.

9. An air conditioner outdoor unit, characterized in that include: Fan (220); as well as The air outlet grille (100) according to any one of claims 1 to 8; The air outlet mesh cover (100) is connected to one side of the fan (220) to guide the airflow discharged from the fan (220) to flow from the air inlet side (105) to the air outlet side (106) through the exhaust passage (108).

10. The air conditioner outdoor unit according to claim 9, characterized in that: The fan (220) includes a hub (210); The maximum diameter (D1) of the central disk (102) of the air outlet mesh cover (100) is 1.01 to 1.3 times the diameter (D2) of the hub (210).

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