Air outlet grille and air conditioner using the same

Abstract

The application relates to the technical field of air conditioning equipment, in particular to an air outlet grille and an air conditioner using the same, which comprises a center disc, an outer frame, a plurality of strip radiation ribs and a plurality of annular ribs; the diameters of the annular ribs are different, the annular ribs are concentrically arranged between the outer frame and the center disc, and the annular ribs are concentrically arranged with the center disc; the radiation ribs are connected with part of the annular ribs, connected with the center disc and / or the outer frame, and form a plurality of air outlet meshes; the annular ribs are provided with a plurality of wave crest portions and a plurality of wave trough portions which are alternately arranged, the wave crest portions and the wave trough portions are opposite in the longitudinal direction, and the longitudinal direction is parallel to the axial direction of the center disc, so that the periodic dynamic and static interference between the existing grille and the air flow is solved, the rotating noise is superimposed, the peak noise is large, and the listening feeling is poor.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, and in particular to an air outlet grille and an air conditioner using the same. Background Technology

[0002] In the air outlet devices of ventilation systems such as air conditioner outdoor units, grilles are an indispensable part, mainly serving to separate the fan from the outside environment and guide airflow. However, the presence of grilles can severely affect the system's airflow resistance, resulting in reduced airflow and increased noise. Tests have shown that the use of air outlet grilles reduces the airflow of the fan system by 7% to 8% and increases noise by approximately 3 dB(A). The rib structure of the grille is a significant factor influencing both noise and airflow in the fan system. Research has revealed that airflow after passing through rotating blades diverges in a spiral pattern. To align with this airflow direction and achieve smooth airflow, most current grille designs have abandoned the original horizontal and vertical square grid pattern, opting instead for circular ring grilles with diverging ribs. This improved rib structure can optimize the airflow field of the fan system to some extent.

[0003] Therefore, the annular ribs of current conventional grilles are conventional circular structures (such as...). Figure 1 As shown in the figure, during use, periodic dynamic and static interference occurs between the airflow and the grille, resulting in superimposed rotational noise, high peak noise, and poor hearing. Summary of the Invention

[0004] To address the aforementioned shortcomings, the present invention aims to provide an air outlet grille and an air conditioner using it, thereby resolving the problem of periodic dynamic and static interference between the existing grille and the airflow, resulting in superimposed rotational noise, high peak noise, and poor hearing.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An air vent grille includes a central disc, an outer frame, several radial ribs, and several annular ribs;

[0007] The diameters of the various annular ribs are different, and the various annular ribs are concentrically arranged between the outer frame and the central disk, and the annular ribs are concentrically arranged with the central disk;

[0008] The radial ribs are at least connected to a portion of the annular ribs and are connected to the central disc and / or the outer frame, forming multiple rings of air outlet mesh.

[0009] The annular rib has multiple alternating crests and troughs, the crests and troughs having opposite depth directions, and the depth direction being parallel to the axis of the central disk.

[0010] Furthermore, the multiple peaks on the several annular ribs exhibit a misalignment trend along the radial direction.

[0011] Furthermore, the depth of the wave crests of several annular ribs decreases from the outside to the inside, and the amplitude of the annular ribs satisfies the following formula:

[0012] Ai = Amax * (imax + 1 - i) / imax;

[0013] Where: Ai is the amplitude of the ring reinforcement, i is the ring reinforcement number, which increases sequentially from the outside to the inside and is an integer; Amax is the maximum amplitude; and imax is the number of ring reinforcements.

[0014] Furthermore, the number of crests of the annular rib is equal to the number of radial ribs connected to the annular rib, and the radial ribs are connected to the crest positions of the annular rib; the number of crests of the annular ribs in the region near the central disc is less than the number of crests of the annular ribs in the region far from the central disc.

[0015] In one embodiment, the outer frame is circular or polygonal.

[0016] An air conditioner includes an air outlet grille as described above.

[0017] The technical solution provided by this invention may include the following beneficial effects:

[0018] The annular rib has multiple alternating crests and troughs, with the crests and troughs having opposite depth directions. The depth direction is parallel to the axis of the central disk, which creates a phase difference in the axial impact of the airflow on the air outlet grille, lengthening the synchronous interference period and reducing peak noise. At the same time, the wave-shaped annular rib design can also improve the overall structural strength of the grille. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a ring structure in the prior art.

[0020] Figure 2 This is a structural schematic diagram of an embodiment of the present invention.

[0021] Figure 3 This is a top view of an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of a ring-shaped rib according to an embodiment of the present invention.

[0023] Figure 5 This is a comparison chart showing the peak rotational noise of an air conditioner using an air outlet grille according to this application and one using a conventional grille at the same rotational speed.

[0024] Figure 6 This is a top view of an embodiment of the present invention.

[0025] Among them: outer frame 2, central plate 1, radial ribs 3, ring ribs 4, and air outlet mesh 01. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this invention, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] The following is in conjunction with the appendix Figure 2 and Figure 6 The technical solution of the present invention will be further illustrated through specific embodiments.

[0030] An air vent grille includes a central disc 1, an outer frame 2, several radial ribs 3, and several annular ribs 4;

[0031] The diameters of the various annular ribs 4 are different, and the various annular ribs 4 are concentrically arranged between the outer frame 2 and the central disk 1, and the annular ribs 4 are concentrically arranged with the central disk 1.

[0032] The radial ribs 3 are connected to at least a portion of the annular ribs 4, and are connected to the central disk 1 and / or the outer frame 2, forming multiple rings of air outlet mesh 01;

[0033] The annular rib 4 has multiple alternating crests and troughs, the crests and troughs having opposite longitudinal directions, and the longitudinal direction being parallel to the axis of the central disk 1.

[0034] In the air outlet devices of ventilation systems such as air conditioner outdoor units, grilles are an indispensable part, mainly serving to separate the fan from the outside environment and guide airflow. However, the presence of grilles can severely affect the system's airflow resistance, resulting in reduced airflow and increased noise. Tests have shown that the use of air outlet grilles reduces the airflow of the fan system by 7% to 8% and increases noise by approximately 3 dB(A). The rib structure of the grille is a significant factor influencing both noise and airflow in the fan system. Research has revealed that airflow after passing through rotating blades diverges in a spiral pattern. To align with this airflow direction and achieve smooth airflow, most current grille designs have abandoned the original horizontal and vertical square grid pattern, opting instead for circular ring grilles with diverging ribs. This improved rib structure can optimize the airflow field of the fan system to some extent. In conventional air vent grilles, periodic dynamic and static interference occurs between the airflow and the grille during use, resulting in superimposed rotational noise, high peak noise, and poor hearing. Since the smooth flow of air from the fan system is affected not only by the overall shape and structure of the air vent grille, but also by the arrangement of the radiating ribs within it, the airflow field is significantly influenced. Therefore, this invention proposes an air vent grille comprising a central disc 1, an outer frame 2, several radial ribs 3, and several annular ribs 4 encircling the central disc 2. The radial ribs 3 connect at least to some of the annular ribs 4 and are connected to the central disc and / or the outer frame, forming multiple rings of airflow mesh. The annular ribs 4 have alternating peaks and troughs, with the peaks and troughs having opposite depth directions, parallel to the axis of the central disc 1. This creates a phase difference in the axial impact of the airflow on the air vent grille, lengthening the synchronous interference period and reducing peak noise. Simultaneously, the wave-shaped annular rib design also improves the overall structural strength of the grille.

[0035] Furthermore, the multiple peaks on the several annular ribs 4 exhibit a misalignment trend in the radial direction.

[0036] To further explain, in order to create a phase difference in the radial impact of the airflow on the air outlet grille, we make the wave crests of the annular rib 4 have a staggered trend when distributed radially. That is, when the wave crests of the annular rib 4 are distributed radially, a wave crest deflection angle is formed. By combining the phase difference of the axial and radial airflow, the superposition period of the noise at the same frequency can be greatly lengthened, the discrete noise (rotational noise) can be decomposed into broadband noise, the peak value of rotational noise can be reduced, and the sound quality can be improved.

[0037] like Figure 6 As shown, i4 is the position of the crest of the fourth annular rib, and θ4 is the crest deflection angle corresponding to the fourth annular rib.

[0038] Furthermore, the depth of the wave crests of the several annular ribs 4 decreases from the outside to the inside, and the amplitude of the annular ribs 4 satisfies the following formula:

[0039] Ai = Amax * (imax + 1 - i) / imax;

[0040] Where: Ai is the amplitude of the ring reinforcement, i is the ring reinforcement number, which increases sequentially from the outside to the inside and is an integer; Amax is the maximum amplitude; and imax is the number of ring reinforcements.

[0041] It should be noted that the depth of the wave crests of several of the annular ribs 4 decreases linearly from the outside to the inside, which further causes the airflow impact to form a phase difference and reduces the peak value of the rotational noise.

[0042] In an optional embodiment, the number of crests of the annular rib 4 is equal to the number of radial ribs 3 connected to the annular rib 4, and the radial ribs 3 are connected to the crest positions of the annular rib 4; the number of crests of the annular rib 4 in the region near the central disk 1 is less than the number of crests of the annular rib 4 in the region far from the central disk 1.

[0043] To further explain, the number of wave crests on the annular rib 4 is consistent with the number of radial ribs 3 connected to the annular rib 4. Based on the simulation study of the air outlet velocity of the fan system, we found that the direction of air outlet after passing through the rotating axial flow fan blades is spiral divergent, and the direction of air outlet velocity from the center of the fan to the tip of the blades will also change with the change of the circumferential position. The number of wave crests of the annular rib 4 near the central disk 1 area is less than the number of wave crests of the annular rib 4 far away from the central disk 1 area, which matches the air outlet direction of the fan blades at different circumferential positions. This structure can effectively optimize the air outlet flow field of the fan system, thereby improving the air volume performance of the fan system and optimizing its noise.

[0044] In an optional embodiment, the radial ribs 3 are formed by spline curves connected to the crest positions of the plurality of annular ribs 4:

[0045] In one optional embodiment, the outer frame 2 is circular or polygonal, and the shape of the outer frame 2 can be changed according to different installation requirements.

[0046] An air conditioner includes an air outlet grille as described above, which reduces the noise of the air conditioner and improves its sound quality.

[0047] Please refer to Figure 4 The peak noise levels of an air conditioner using an air outlet grille according to this application were compared with those using a conventional grille at the same rotational speed. Since f0 = rotational speed * number of impeller blades / 60, in this case, the air conditioner has 3 impeller blades and a rotational speed of 900 rpm, so f0 = 45 (HZ). The comparison shows that the peak noise level using an air outlet grille according to this application is significantly improved.

[0048] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. An air outlet grille, characterized in that: It includes a central disc, an outer frame, several radial ribs, and several annular ribs; The diameters of the various annular ribs are different, and the various annular ribs are concentrically arranged between the outer frame and the central disk, and the annular ribs are concentrically arranged with the central disk; The radial ribs are at least connected to a portion of the annular ribs and are connected to the central disc and / or the outer frame, forming multiple rings of air outlet mesh. The annular rib has multiple alternating crests and multiple troughs, the crests and troughs having opposite depth directions, and the depth direction being parallel to the axis of the central disk; The multiple peaks on the several annular ribs exhibit a tendency to be misaligned along the radial direction.

2. The air outlet grille according to claim 1, characterized in that: The depth of the wave crests of several annular ribs decreases from the outside to the inside, and the amplitude of the annular ribs satisfies the following formula: Ai = Amax * (imax + 1 - i) / imax; Where: Ai is the amplitude of the ring reinforcement, i is the ring reinforcement number, which increases sequentially from the outside to the inside and is an integer; Amax is the maximum amplitude; and imax is the number of ring reinforcements.

3. The air outlet grille according to claim 2, characterized in that: The number of crests of the annular rib and The number of radial ribs connected to the annular ribs is equal, and the radial ribs are connected to the crests of the annular ribs; the number of crests of the annular ribs in the region closer to the central disc is less than the number of crests of the annular ribs in the region farther from the central disc.

4. The air outlet grille according to claim 1, characterized in that: The outer frame is circular or polygonal.

5. An air conditioner, characterized in that: Includes an air outlet grille as described in any one of claims 1-4.

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