Grid structure and air conditioner outdoor unit with same

Abstract

The utility model provides a grating structure and an air conditioner outdoor unit with the grating structure, the grating structure comprises a low-speed ventilation part and a high-speed ventilation part which are connected with each other, and the high-speed ventilation part is arranged around the outer edge of the low-speed ventilation part; the low-speed ventilation part comprises a plurality of first annular ribs arranged at intervals in the radial direction of the grid structure and a plurality of first radial ribs arranged at intervals in the annular direction of the grid structure, and the first radial ribs are connected with the first annular ribs; the high-speed ventilation part comprises a plurality of second annular ribs arranged at intervals in the radial direction of the grid structure and a plurality of second radial ribs arranged at intervals in the annular direction of the grid structure, and the second radial ribs are connected with the second annular ribs; wherein the grid structure is provided with a windward side and a leeward side which are oppositely arranged; on the windward side, the low-speed ventilation part protrudes out of the high-speed ventilation part. According to the technical scheme, the problem that in the prior art, an air outlet grille usually causes large noise can be solved.

Description

Technical Field

[0001] This utility model relates to the field of air outlet grille technology, and more specifically, to a grille structure and an outdoor air conditioning unit having the same. Background Technology

[0002] Currently, the air outlet grille is an important aerodynamic component of the outdoor unit of an air conditioner. The air outlet grille not only provides basic safety protection, but also has the aerodynamic airflow guiding function of converging and distributing air.

[0003] However, existing air outlet grilles often generate significant noise, resulting in a substantial increase in the noise radiation level of the outdoor unit of the air conditioner. Utility Model Content

[0004] The main purpose of this utility model is to provide a grille structure and an outdoor air conditioning unit having the same, so as to solve the problem that the air outlet grille in the prior art usually causes a lot of noise.

[0005] To achieve the above objectives, according to one aspect of the present invention, a grid structure is provided, comprising:

[0006] A low-speed ventilation section and a high-speed ventilation section are interconnected, with the high-speed ventilation section surrounding the outer edge of the low-speed ventilation section; the low-speed ventilation section includes a plurality of first annular ribs arranged radially spaced along the grid structure and a plurality of first radial ribs arranged circumferentially spaced along the grid structure, the first radial ribs being connected to the plurality of first annular ribs; the high-speed ventilation section includes a plurality of second annular ribs arranged radially spaced along the grid structure and a plurality of second radial ribs arranged circumferentially spaced along the grid structure, the second radial ribs being connected to the plurality of second annular ribs;

[0007] The grille structure has a windward side and a leeward side that are arranged opposite to each other; on the windward side, the low-speed ventilation section protrudes from the high-speed ventilation section.

[0008] Furthermore, the circumferential distribution density of the plurality of second radial ribs is greater than the circumferential distribution density of the plurality of first radial ribs; and / or,

[0009] The maximum spacing between two adjacent second radial ribs is less than the minimum spacing between two adjacent first radial ribs; and / or,

[0010] The projections of the outer edge of the grille structure and the inner edge of the low-speed ventilation section onto the vertical plane of the grille structure are both circular. The diameter corresponding to the projection of the inner edge of the low-speed ventilation section onto the vertical plane is D1, and the diameter corresponding to the projection of the outer edge of the grille structure onto the vertical plane is D2, where 0.58≤D1 / D2≤0.88.

[0011] Furthermore, the grille structure is arranged opposite to the fan blades, and the plurality of second radial ribs are all bent along a preset direction, with the rotation direction formed by the plurality of second radial ribs being in the same direction as the rotation direction of the fan blades; and / or,

[0012] The projection of the second radial rib onto the vertical plane of the grid structure forms a second radial feature line, which is a two-dimensional spiral.

[0013] Furthermore, the projection of the first radial rib onto the axial plane of the grid structure forms a first radial feature line, which includes a first arc segment and a second arc segment connected together.

[0014] Wherein, the first arc segment and the second arc segment bend in opposite directions; and / or,

[0015] The first arc segment is located on the side of the second arc segment away from the high-speed ventilation section, and the bending direction of the first arc segment is the same as the bending direction of the second radial feature line formed by the projection of the second radial rib on the vertical plane of the grid structure.

[0016] The first arc segment and the second arc segment are tangent at the connection point.

[0017] Furthermore, the low-speed ventilation section also includes a third radial rib, which is disposed between two adjacent first radial ribs and spaced apart from the two adjacent first radial ribs;

[0018] Wherein, the radial length of the third radial rib in the grid structure is less than the radial length of the first radial rib in the grid structure; and / or,

[0019] The third radial rib is located on the side of the low-speed ventilation section closer to the high-speed ventilation section.

[0020] Furthermore, the low-speed ventilation section has a third radial feature line in the cross-section along the axis of the grille structure, and the third radial feature line is an arc connecting segment; the high-speed ventilation section has a fourth radial feature line in the cross-section along the axis of the grille structure, and the fourth radial feature line is a straight connecting segment.

[0021] Furthermore, the arc connecting segment includes a third arc segment and a fourth arc segment that are interconnected;

[0022] Wherein, the third arc segment and the fourth arc segment bend in opposite directions; and / or,

[0023] The third arc segment and the fourth arc segment are tangent at the connection point.

[0024] Furthermore, the maximum spacing between two adjacent second radial ribs is t1, where 9mm ≤ t1 ≤ 10.5mm; and / or,

[0025] The maximum distance between two adjacent first annular ribs is t2, where 9mm ≤ t2 ≤ 10.5mm.

[0026] Furthermore, the projection of the second radial rib onto the axial plane of the grid structure is a two-dimensional helix; the curve of the two-dimensional helix on the axial plane should satisfy the following formula:

[0027] R=A+B*T, A=0.5*D1; B=0.5*(D2-D1); β=±(C+D*T), 0≤T≤1;

[0028] Wherein, R represents the radial distribution pattern of the curve, β represents the circumferential distribution pattern of the curve, A represents the starting position of the spiral in the R direction, B represents the radius increment of the starting point of the spiral in the R direction, C represents the initial phase of the spiral in the β direction, D represents the increment of the spiral in the β direction, D1 is the diameter corresponding to the projection of the inner side of the outer edge of the low-speed ventilation part onto the vertical plane, and D2 is the diameter corresponding to the projection of the inner side of the outer edge of the grid structure onto the vertical plane.

[0029] Furthermore, the projection of the first radial rib onto the axial plane of the grid structure forms a first radial feature line, the central angles corresponding to the two ends of the first radial feature line being α, where 5°≤α≤50°; and / or,

[0030] The projection of the second radial rib onto the axial plane of the grid structure forms a second radial feature line, the central angles corresponding to the two ends of the second radial feature line being γ, where 5°≤γ≤25°; and / or,

[0031] The grille structure further includes an outer frame and an inner cover. The outer frame surrounds the outer periphery of the high-speed ventilation section, and the width of the outer frame in the axial direction of the grille structure is T1. The low-speed ventilation section surrounds the outer periphery of the inner cover, and the width of the inner cover in the axial direction of the grille structure is T2. <T1。

[0032] Furthermore, the radial cross-section of the first radial rib and / or the radial cross-section of the second radial rib are streamlined cross-sections, the streamlined cross-sections having an arc edge facing the windward side and rib edges located on both sides of the arc edge, the radius of the arc edge being r, and the length of the rib edge being l;

[0033] Where r = a + b*t, 0.5mm ≤ a ≤ 1mm, 0.2mm ≤ b ≤ 1mm; and / or,

[0034] l=c+d*t,4mm≤c≤7mm,2mm≤d≤5mm;

[0035] 0≤t≤1.

[0036] Specifically, the width of the streamlined cross-section gradually increases from one end near the grid structure to the other end away from the grid structure, in order to guide the airflow.

[0037] Further, the second radial rib has a first radial cross-section at the end near the first radial rib, and a second radial cross-section at the end away from the first radial rib; the first radial cross-section has a first arcuate edge facing the windward side and first rib edges located on both sides of the first arcuate edge, the radius of the first arcuate edge being r1, and the length of the first rib edge being l1; the second radial cross-section has a second arcuate edge facing the windward side and second rib edges located on both sides of the second arcuate edge, the radius of the second arcuate edge being r2, and the length of the second rib edge being l1. l2; The first radial rib has a third radial section at the end away from the second radial rib, and a fourth radial section at the end near the second radial rib; The third radial section has a third arc edge facing the windward side and third rib edges located on both sides of the third arc edge, the radius of the third arc edge being r3, and the length of the third rib edge being l3; The fourth radial section has a fourth arc edge facing the windward side and fourth rib edges located on both sides of the fourth arc edge, the radius of the fourth arc edge being r4, and the length of the fourth rib edge being l4;

[0038] Where r2>r1; and / or,

[0039] l2>l1; and / or,

[0040] r4>r3; and / or,

[0041] l4>l3.

[0042] Furthermore, the second radial rib has a first mounting angle θ1 between it and the vertical plane of the grid structure, 65°≤θ1≤85°; and / or,

[0043] The first radial rib has a second mounting angle θ2 between it and the vertical plane of the grid structure, where 40°≤θ2≤80°.

[0044] According to another aspect of the present invention, an outdoor unit for an air conditioner is provided, comprising:

[0045] An outdoor unit housing, on which an air outlet is provided;

[0046] The grille structure described above is installed at the air outlet.

[0047] By applying the technical solution of this utility model, the high-speed ventilation section is positioned further away from the windward side compared to the low-speed ventilation section. This reduces the inlet angle of attack of the high-speed ventilation section, particularly the inlet angle of attack of the second radial rib, thereby reducing impact loss and interference separation noise. Therefore, it solves the problem of excessive noise typically caused by air outlet grilles in existing technologies. Attached Figure Description

[0048] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0049] Figure 1 A schematic diagram of a grid structure provided according to an embodiment of the present invention is shown;

[0050] Figure 2 A front view of a grid structure provided according to an embodiment of the present invention is shown;

[0051] Figure 3 It shows Figure 2 A schematic diagram of direction AA;

[0052] Figure 4 It shows Figure 2 Enlarged view of point B;

[0053] Figure 5 It shows Figure 2 Enlarged view of point C;

[0054] Figure 6 A schematic diagram of the grid structure provided according to an embodiment of the present invention is shown from another angle;

[0055] Figure 7 It shows Figure 6 Enlarged view of point D;

[0056] Figure 8 It shows Figure 6 Enlarged view of point E;

[0057] Figure 9 A schematic diagram of a streamlined cross-section provided according to an embodiment of the present invention is shown;

[0058] Figure 10 The distribution pattern of the first mounting angle of the second radial rib of the high-speed ventilation section provided according to an embodiment of the present invention is shown;

[0059] Figure 11The distribution pattern of the second mounting angle of the first radial rib of the low-speed ventilation section provided according to an embodiment of the present invention is shown;

[0060] Figure 12 A schematic diagram showing the relationship between rotational speed and airflow of a grille structure provided according to an embodiment of the present invention is shown;

[0061] Figure 13 A schematic diagram showing the relationship between airflow and noise in a grille structure provided according to an embodiment of the present invention is shown.

[0062] The above figures include the following reference numerals:

[0063] 10. Low-speed ventilation section; 11. First annular rib; 12. First radial rib; 120. First radial characteristic line; 121. First arc segment; 122. Second arc segment; 13. Third radial rib; 14. Third radial characteristic line; 141. Third arc segment; 142. Fourth arc segment;

[0064] 20. High-speed ventilation section; 21. Second annular rib; 22. Second radial rib; 220. Second radial characteristic line; 23. Fourth radial characteristic line;

[0065] 30. Outer frame;

[0066] 40. Inner cover;

[0067] 51. Rounded edge; 52. Rib edge. Detailed Implementation

[0068] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0069] like Figures 1 to 9 As shown, Embodiment 1 of this utility model provides a grille structure, which includes a low-speed ventilation section 10 and a high-speed ventilation section 20 connected to each other. The high-speed ventilation section 20 is arranged around the outer edge of the low-speed ventilation section 10. The low-speed ventilation section 10 includes a plurality of first annular ribs 11 arranged radially spaced along the grille structure and a plurality of first radial ribs 12 arranged circumferentially spaced along the grille structure, with the first radial ribs 12 connected to the plurality of first annular ribs 11. The high-speed ventilation section 20 includes a plurality of second annular ribs 21 arranged radially spaced along the grille structure and a plurality of second radial ribs 22 arranged circumferentially spaced along the grille structure, with the second radial ribs 22 connected to the plurality of second annular ribs 21. The grille structure has a windward side and a leeward side arranged opposite to each other; as shown... Figure 1 As shown, on the windward side, the low-speed ventilation section 10 protrudes from the high-speed ventilation section 20.

[0070] By employing the grille structure provided in this embodiment, the high-speed ventilation section 20 is positioned further away from the windward side compared to the low-speed ventilation section 10. This reduces the inlet angle of attack of the high-speed ventilation section 20, particularly the inlet angle of attack of the second radial rib 22, thereby reducing impact loss and interference separation noise. Therefore, it solves the problem of excessive noise typically caused by exhaust grilles in the prior art.

[0071] In this embodiment, the circumferential distribution density of the multiple second radial ribs 22 is greater than that of the multiple first radial ribs 12. The inner first radial ribs 12 adopt a low-density, weakly rectifying rib design to adapt to the low-speed turbulent airflow of the inner layer, suppress the size and intensity of the rib tail vortex shedding, reduce noise, and increase airflow. The outer second radial ribs 22 adopt a high-density, strongly rectifying rib design to adapt to and manage the high-speed rotating airflow of the outer layer, reduce wind resistance, and increase airflow.

[0072] Preferably, in this embodiment, the outer high-speed ventilation section 20 and the inner low-speed ventilation section 10 are independently designed. The outer straight grille adopts a high-density, strong-rectification rib design to adapt to and manage the high-speed rotating airflow of the outer layer, reducing wind resistance and increasing air volume; the inner arc-shaped grille adopts a low-density, weak-rectification rib design to adapt to the low-speed turbulent airflow of the inner layer, suppressing the size and intensity of the rib tail vortex shedding, reducing noise and increasing air volume.

[0073] The maximum spacing between two adjacent second radial ribs 22 is less than the minimum spacing between two adjacent first radial ribs 12, so that the circumferential distribution density of the multiple second radial ribs 22 is greater than the circumferential distribution density of the multiple first radial ribs 12.

[0074] Specifically, the projections of the outer edges of the grille structure and the low-speed ventilation section 10 onto the vertical plane of the grille structure are both circular. The diameter corresponding to the projection of the inner side of the outer edge of the low-speed ventilation section 10 onto the vertical plane is D1, and the diameter corresponding to the projection of the inner side of the outer edge of the grille structure onto the vertical plane is D2, where 0.58 ≤ D1 / D2 ≤ 0.88. This arrangement allows for a better balance between the low-speed ventilation section 10 and the high-speed ventilation section, thereby facilitating noise reduction and wind resistance.

[0075] It should be noted that "the inner side of the outer edge of the low-speed ventilation section 10" can be understood as the inner side of the annular rib at the outer edge of the low-speed ventilation section 10. "The inner side of the outer edge of the grille structure" can be understood as the inner side of the annular rib at the outer edge of the grille structure.

[0076] Specifically, the grille structure is positioned opposite to the fan blades, and multiple second radial ribs 22 are bent along a preset direction, with the rotation direction formed by the multiple second radial ribs 22 being the same as the rotation direction of the fan blades. This facilitates better noise reduction and wind resistance.

[0077] The projection of the second radial rib 22 onto the vertical plane of the grille structure forms a second radial feature line 220, which is a two-dimensional spiral. This facilitates better guidance of high-speed airflow and reduces exhaust noise.

[0078] like Figure 2 As shown, the projection of the first radial rib 12 onto the axial plane of the grille structure forms a first radial feature line 120. The first radial feature line 120 includes a first arc segment 121 and a second arc segment 122 connected together; wherein the first arc segment 121 and the second arc segment 122 have opposite bending directions. This is to better adapt to the turbulent airflow in the low-speed region.

[0079] The first arc segment 121 is located on the side of the second arc segment 122 away from the high-speed ventilation section 20. The bending direction of the first arc segment 121 is the same as the bending direction of the second radial feature line 220 formed by the projection of the second radial rib 22 onto the vertical plane of the grille structure. In this way, the sequentially arranged second radial rib 22, second arc segment 122 and first arc segment 121 can form a back-and-forth bending spiral, which can better adapt to the airflow direction at different positions, better guide the airflow, better facilitate air outlet, and reduce air outlet noise.

[0080] The first arc segment 121 and the second arc segment 122 are tangent at the connection point to facilitate a smooth transition and thus avoid the impact of abrupt structural changes on airflow.

[0081] In this embodiment, the low-speed ventilation section 10 further includes a third radial rib 13, which is disposed between two adjacent first radial ribs 12 and spaced apart from the two adjacent first radial ribs 12.

[0082] The third radial rib 13 has a shorter radial length than the first radial rib 12 in the grille structure. This reduces production costs and allows for better adaptation to airflow characteristics in low-speed zones. It also helps reduce drag, increase airflow area, lower material costs, and reduce noise. Specifically, the number of first radial ribs 12 can be between 10 and 20, and the number of third radial ribs 13 corresponds one-to-one with the number of first radial ribs 12.

[0083] The third radial rib 13 is located on the side of the low-speed ventilation section 10 near the high-speed ventilation section 20. This allows for effective guidance of the higher-speed airflow on the side of the low-speed ventilation section 10 near the high-speed ventilation section 20, adapting to the flow of the higher-speed airflow and reducing noise.

[0084] like Figure 3As shown, in this embodiment, the low-speed ventilation section 10 has a third radial feature line 14 in the cross-section along the axis of the grille structure, and the third radial feature line 14 is an arc-shaped connecting segment; the high-speed ventilation section 20 has a fourth radial feature line 23 in the cross-section along the axis of the grille structure, and the fourth radial feature line 23 is a straight connecting segment. Thus, the third radial feature line 14 facilitates a gradual transition of the low-speed ventilation section 10 to the high-speed ventilation section 20, thereby avoiding a sudden increase in airflow that could cause a large impact, and consequently reducing the noise caused by a large airflow impact.

[0085] Specifically, the length of the fourth radial feature line 23 can be (D2-D1) / 2, so as to better optimize the size of the fourth radial feature line 23, thereby facilitating better airflow guidance.

[0086] Furthermore, by setting the fourth radial feature line 23 as a straight connecting segment, it is easier to reduce the excessive axial dimension at the high-speed ventilation section 20, facilitating high-speed airflow, reducing high-speed airflow resistance, and thus reducing noise. The aforementioned straight connecting segment can be in a direction completely perpendicular to the axial direction or in a direction inclined at a predetermined angle to the axial direction, where the inclination can be a small angle (between 0° and 30°). Preferably, in this embodiment, the straight segment is completely perpendicular to the axial direction, thus enabling the high-speed ventilation section 20 to form a flat structure, facilitating high-speed airflow, reducing airflow resistance, and further reducing airflow noise.

[0087] Specifically, the arc connection segment includes a third arc segment 141 and a fourth arc segment 142 that are connected to each other.

[0088] The third arc segment 141 and the fourth arc segment 142 have opposite bending directions, which facilitates the effective guidance and direction of airflow through the third arc segment 141 and the fourth arc segment 142 for better air outlet.

[0089] The third arc segment 141 and the fourth arc segment 142 are tangent at the connection point, which facilitates a smooth transition between the third arc segment 141 and the fourth arc segment 142 at the connection point and avoids a situation where the change between the third arc segment 141 and the fourth arc segment 142 at the connection point is too large and affects the smooth flow of air.

[0090] In this embodiment, the maximum distance between two adjacent second radial ribs 22 is t1, 9mm≤t1≤10.5mm; and / or, the maximum distance between two adjacent first annular ribs 11 is t2, 9mm≤t2≤10.5mm. By reasonably setting the values ​​of t1 and t2, wind resistance and noise can be reduced as much as possible while ensuring that the grille meets the corresponding safety requirements.

[0091] In this embodiment, the projection of the second radial rib 22 on the axial vertical plane of the grid structure is a two-dimensional spiral; the curve of the two-dimensional spiral on the axial vertical plane should satisfy the following formula:

[0092] R = A + B * T, A = 0.5 * D1; B = 0.5 * (D2 - D1); β = ±(C + D * T), 0 ≤ T ≤ 1;

[0093] Where, R represents the law of radial distribution of the curve, β represents the law of circumferential distribution of the curve, A represents the starting position of the spiral in the R direction, B represents the radius increment of the starting point of the spiral in the R direction, C represents the initial phase of the spiral in the β direction, D represents the increment of the spiral in the β direction, D1 is the diameter corresponding to the projection of the inner side of the outer edge of the low-speed ventilation part 10 on the axial vertical plane, and D2 is the diameter corresponding to the projection of the inner side of the outer edge of the grid structure on the axial vertical plane. With such a setting, it is convenient to better optimize the shape of the second radial rib 22, so as to better guide through the second radial rib 22 and better reduce noise.

[0094] Specifically, C in this embodiment can be set to 90°. Considering that the array of radial rib bars is completely axially symmetric about the axis, the initial phase is not important. The value range of D is actually restricted by the value of t1. The larger D is, the longer the outer-layer radial rib bars (corresponding to the second radial rib) are, and the greater the wind resistance is; when D is smaller, it is closer to the length of the radial straight line passing through the center of the circle (the straight line pointing from D1 to D2). Among them, the value range of D can be [0.01 * 360, 0.15 * 360].

[0095] Specifically, the projection of the first radial rib 12 on the axial vertical plane of the grid structure forms a first radial feature line 120, and the central angle corresponding to both ends of the first radial feature line 120 is α, 5° ≤ α ≤ 50°; and / or, the projection of the second radial rib 22 on the axial vertical plane of the grid structure forms a second radial feature line 220, and the central angle corresponding to both ends of the second radial feature line 220 is γ, 5° ≤ γ ≤ 25°. By setting within a reasonable parameter range, the outer-layer high-speed rotating air flow can be combed through the high-density radial rib bars, making it more conform to the air outlet angle, and at the same time further enhancing the strength of the outer-layer grid structure. Furthermore, the number of annular rib bars that do not match the air flow direction can be reduced, effectively reducing the wind resistance and suppressing the noise radiation level.

[0096] The grid structure further includes an outer frame 30 and an inner cover 40. The outer frame 30 is arranged around the outer periphery of the high-speed ventilation part 20, and the width of the outer frame 30 in the axial direction of the grid structure is T1; the low-speed ventilation part 10 is arranged around the outer periphery of the inner cover 40, and the width of the inner cover 40 in the axial direction of the grid structure is T2, and T2 < T1. And the preferred range of T2 / T1 is [0.3, 0.5].

[0097] Such as Figure 9As shown, the radial section of the first radial rib 12 and / or the radial surface of the second radial rib 22 are streamlined sections. The streamlined section has an arc edge 51 facing the windward side and ribs 52 located on both sides of the arc edge 51. The radius of the arc edge 51 is r, and the length of the rib 52 is l.

[0098] Where r = a + b * t, 0.5 mm ≤ a ≤ 1 mm, 0.2 mm ≤ b ≤ 1 mm, 0 ≤ t ≤ 1; and / or,

[0099] l=c+d*t,4mm≤c≤7mm,2mm≤d≤5mm,0≤t≤1.

[0100] By setting appropriate parameter ranges and variation patterns for the radial ribs (here, radial ribs refer to the first radial rib 12 or the second radial rib 22), the actual airflow direction at the fan outlet can be closely matched, effectively controlling impact loss, reducing wind resistance, increasing airflow, and reducing noise.

[0101] Along the streamlined cross-section from one end near the grid structure to the other end away from the grid structure, the width of the streamlined cross-section gradually increases to accommodate airflow and facilitate airflow guidance.

[0102] Specifically, the second radial rib 22 has a first radial cross-section (corresponding to a streamlined cross-section) at the end near the first radial rib 12, and a second radial cross-section (corresponding to a streamlined cross-section) at the end away from the first radial rib 12; the first radial cross-section has a first arc edge facing the windward side and first rib edges located on both sides of the first arc edge, the radius of the first arc edge being r1, and the length of the first rib edge being l1; the second radial cross-section has a second arc edge facing the windward side and second rib edges located on both sides of the second arc edge, the radius of the second arc edge being r2. The length of the second rib is l2; the first radial rib 12 has a third radial section at the end away from the second radial rib 22, and a fourth radial section at the end near the second radial rib 22; the third radial section has a third arc edge facing the windward side and third ribs located on both sides of the third arc edge, the radius of the third arc edge is r3, and the length of the third rib is l3; the fourth radial section has a fourth arc edge facing the windward side and fourth ribs located on both sides of the fourth arc edge, the radius of the fourth arc edge is r4, and the length of the fourth rib is l4.

[0103] Where r2>r1; and / or l2>l1; and / or r4>r3; and / or l4>l3.

[0104] By adopting this size setting and setting appropriate parameter ranges and variation patterns for the first radial rib 12 and the second radial rib 22, the actual airflow direction at the fan outlet can be closely matched, effectively controlling impact loss, reducing wind resistance, increasing air volume, and reducing noise.

[0105] like Figure 9 As shown, the angle between the radial rib and the vertical plane of the grid structure is the installation angle θ. Specifically, θ can be understood as the angle between the axis of symmetry of the radial rib (the two sides of the radial rib are symmetrical with respect to the axis of symmetry of the radial rib) and the vertical plane.

[0106] Specifically, when the radial rib is the second radial rib 22, the angle between the corresponding second radial rib 22 and the vertical plane of the grid structure is the first installation angle θ1; when the radial rib is the first radial rib 12, the angle between the first radial rib 12 and the vertical plane of the grid structure is the second installation angle θ2.

[0107] Specifically, the second radial rib 22 (corresponding to the outer grille) has a first installation angle θ1 between itself and the vertical plane of the grille structure, where 65°≤θ1≤85°. By setting appropriate radial rib parameter ranges and their variation patterns, the actual airflow direction at the fan outlet can be closely matched, effectively controlling impact loss, reducing wind resistance, increasing airflow, and simultaneously reducing noise. Specifically, the distribution pattern of the first installation angle is as follows: Figure 10 As shown.

[0108] Specifically, the first radial rib 12 (corresponding to the inner grille) has a second installation angle θ2 between it and the vertical plane of the grille structure, where 40°≤θ2≤80°. By setting appropriate radial rib parameter ranges and their variation patterns, the actual airflow direction at the fan outlet can be closely matched, effectively controlling impact loss, reducing wind resistance, increasing airflow, and simultaneously reducing noise. Specifically, the distribution pattern of the first installation angle is as follows: Figure 11 As shown. The test results of the grid structure provided in this embodiment are as follows. Figure 12 and 13 As shown.

[0109] According to another aspect of the present invention, an outdoor unit for an air conditioner is provided, which includes an outdoor unit housing and a grille structure provided in the above embodiments. An air outlet is provided on the outdoor unit housing, and the grille structure is installed at the air outlet.

[0110] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects: They reduce the airflow attenuation induced by the air outlet grille of the air conditioner outdoor unit and suppress its high noise radiation level. Through the independent design of the inner and outer double-layer grilles, the axial distribution pattern of the grilles, and the variable sweeping cross-section design of the radial ribs, under the required airflow conditions, with and without the grille: airflow at the same rotation speed is reduced by 3.32%, and noise is increased by approximately 2.2 dB. This effectively improves the grille noise performance of existing air conditioner outdoor units.

[0111] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0112] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0113] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0114] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0115] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0116] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A grid structure, characterized in that, include: A low-speed ventilation section (10) and a high-speed ventilation section (20) are interconnected, the high-speed ventilation section (20) being arranged around the outer edge of the low-speed ventilation section (10); the low-speed ventilation section (10) includes a plurality of first annular ribs (11) arranged radially spaced along the grid structure and a plurality of first radial ribs (12) arranged circumferentially spaced along the grid structure, the first radial ribs (12) being connected to the plurality of first annular ribs (11); the high-speed ventilation section (20) includes a plurality of second annular ribs (21) arranged radially spaced along the grid structure and a plurality of second radial ribs (22) arranged circumferentially spaced along the grid structure, the second radial ribs (22) being connected to the plurality of second annular ribs (21); The grille structure has a windward side and a leeward side arranged opposite to each other; on the windward side, the low-speed ventilation section (10) protrudes from the high-speed ventilation section (20).

2. The grid structure according to claim 1, characterized in that, The circumferential distribution density of the plurality of second radial ribs (22) is greater than the circumferential distribution density of the plurality of first radial ribs (12); and / or, The maximum spacing between two adjacent second radial ribs (22) is less than the minimum spacing between two adjacent first radial ribs (12); and / or, The projections of the outer edge of the grille structure and the outer edge of the low-speed ventilation section (10) onto the vertical plane of the grille structure are both circular. The diameter corresponding to the projection of the inner side of the outer edge of the low-speed ventilation section (10) onto the vertical plane is D1, and the diameter corresponding to the projection of the inner side of the outer edge of the grille structure onto the vertical plane is D2. 0.58≤D1 / D2≤0.

88.

3. The grid structure according to claim 1, characterized in that, The grille structure is arranged opposite to the fan blades, and the plurality of second radial ribs (22) are all bent along a preset direction, and the rotation direction formed by the plurality of second radial ribs (22) is in the same direction as the rotation direction of the fan blades; and / or, The projection of the second radial rib (22) onto the vertical plane of the grid structure forms a second radial feature line (220), which is a two-dimensional spiral.

4. The grid structure according to claim 1, characterized in that, The projection of the first radial rib (12) onto the axial plane of the grid structure forms a first radial feature line (120), which includes a first arc segment (121) and a second arc segment (122) connected together. Wherein, the first arc segment (121) and the second arc segment (122) bend in opposite directions; and / or, The first arc segment (121) is located on the side of the second arc segment (122) away from the high-speed ventilation section (20), and the bending direction of the first arc segment (121) is the same as the bending direction of the second radial feature line (220) formed by the projection of the second radial rib (22) on the vertical plane of the grid structure. The first arc segment (121) and the second arc segment (122) are tangent at the connection point.

5. The grid structure according to claim 1, characterized in that, The low-speed ventilation section (10) further includes a third radial rib (13), which is disposed between two adjacent first radial ribs (12) and spaced apart from the two adjacent first radial ribs (12); Wherein, the radial length of the third radial rib (13) in the grid structure is less than the radial length of the first radial rib (12) in the grid structure; and / or, The third radial rib (13) is located on the side of the low-speed ventilation section (10) closer to the high-speed ventilation section (20).

6. The grid structure according to claim 1, characterized in that, The low-speed ventilation section (10) has a third radial feature line (14) in the cross section along the axis of the grille structure, and the third radial feature line (14) is an arc connecting segment; the high-speed ventilation section (20) has a fourth radial feature line (23) in the cross section along the axis of the grille structure, and the fourth radial feature line (23) is a straight connecting segment.

7. The grid structure according to claim 6, characterized in that, The arc connecting segment includes a third arc segment (141) and a fourth arc segment (142) that are connected to each other; Wherein, the bending directions of the third arc segment (141) and the fourth arc segment (142) are opposite; and / or, The third arc segment (141) and the fourth arc segment (142) are tangent at the connection point.

8. The grid structure according to claim 1, characterized in that, The maximum distance between two adjacent second radial ribs (22) is t1, 9mm ≤ t1 ≤ 10.5mm; and / or, The maximum distance between two adjacent first annular ribs (11) is t2, 9mm≤t2≤10.5mm.

9. The grid structure according to claim 1, characterized in that, The projection of the second radial rib (22) onto the axial plane of the grid structure is a two-dimensional helix; the curve of the two-dimensional helix on the axial plane should satisfy the following formula: R=A+B*T, A=0.5*D1; B=0.5*(D2-D1); β=±(C+D*T), 0≤T≤1; Wherein, R represents the radial distribution law of the curve, β represents the circumferential distribution law of the curve, A represents the starting position of the spiral in the R direction, B represents the radius increment of the starting point of the spiral in the R direction, C represents the initial phase of the spiral in the β direction, D represents the increment of the spiral in the β direction, D1 is the diameter corresponding to the projection of the inner side of the outer edge of the low-speed ventilation part (10) on the vertical plane of the axis, and D2 is the diameter corresponding to the projection of the inner side of the outer edge of the grid structure on the vertical plane of the axis.

10. The grid structure according to claim 1, characterized in that, The projection of the first radial rib (12) onto the axial plane of the grid structure forms a first radial feature line (120), the central angles corresponding to the two ends of the first radial feature line (120) being α, 5°≤α≤50°; and / or, The projection of the second radial rib (22) onto the axial plane of the grid structure forms a second radial feature line (220), the central angles corresponding to the two ends of the second radial feature line (220) being γ, 5°≤γ≤25°; and / or, The grille structure further includes an outer frame (30) and an inner cover (40). The outer frame (30) is arranged around the outer periphery of the high-speed ventilation section (20), and the width of the outer frame (30) in the axial direction of the grille structure is T1. The low-speed ventilation section (10) is arranged around the outer periphery of the inner cover (40), and the width of the inner cover (40) in the axial direction of the grille structure is T2. <T1。 11. The grid structure according to claim 1, characterized in that, The radial cross section of the first radial rib (12) and / or the radial cross section of the second radial rib (22) are streamlined cross sections. The streamlined cross section has an arc edge (51) facing the windward side and rib edges (52) located on both sides of the arc edge (51). The radius of the arc edge (51) is r, and the length of the rib edge (52) is l. Where r = a + b * t, 0.5 mm ≤ a ≤ 1 mm, 0.2 mm ≤ b ≤ 1 mm, 0 ≤ t ≤ 1; and / or, l = c + d * t, 4mm ≤ c ≤ 7mm, 2mm ≤ d ≤ 5mm, 0 ≤ t ≤ 1; and / or, The width of the streamlined cross-section gradually increases from one end near the grid structure to the other end away from the grid structure.

12. The grid structure according to claim 1, characterized in that, The second radial rib (22) has a first radial section at one end near the first radial rib (12), and a second radial section at one end away from the first radial rib (12); the first radial section has a first arc edge facing the windward side and first rib edges located on both sides of the first arc edge, the radius of the first arc edge being r1, and the length of the first rib edge being l1; the second radial section has a second arc edge facing the windward side and second rib edges located on both sides of the second arc edge, the radius of the second arc edge being r2, and the length of the second rib edge being l2; The first radial rib (12) has a third radial section at the end away from the second radial rib (22), and the first radial rib (12) has a fourth radial section at the end near the second radial rib (22); the third radial section has a third arc edge facing the windward side and third rib edges located on both sides of the third arc edge, the radius of the third arc edge is r3, and the length of the third rib edge is l3; the fourth radial section has a fourth arc edge facing the windward side and fourth rib edges located on both sides of the fourth arc edge, the radius of the fourth arc edge is r4, and the length of the fourth rib edge is l4; Where r2>r1; and / or, l2>l1; and / or, r4>r3; and / or, l4>l3。 13. The grid structure according to claim 1, characterized in that, The second radial rib (22) has a first mounting angle θ1 between itself and the vertical plane of the grid structure, 65°≤θ1≤85°; and / or, The first radial rib (12) has a second mounting angle θ2 between it and the vertical plane of the grid structure, 40°≤θ2≤80°.

14. An outdoor unit for an air conditioner, characterized in that, include: An outdoor unit housing, on which an air outlet is provided; The grille structure according to any one of claims 1 to 13, wherein the grille structure is installed at the air outlet.

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