Air outlet grille and air conditioner

Abstract

The present invention provides an air outlet grille and an air conditioner, comprising: an inner frame, a first rib concentrically arranged with the inner frame, having a diameter greater than that of the inner frame and gradually increasing in diameter, and a second rib connecting a preset number of the first ribs and / or the inner frame; wherein the spacing between the first ribs gradually increases in the direction from the first rib to the inner frame; and the spacing between the second ribs gradually decreases along the direction. The air outlet area can be increased, the air outlet volume can be increased, the system impedance caused by the air outlet grille can be reduced, and the fan efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air outlet grille and an air conditioner. Background Art

[0002] Air outlet grilles are widely used in air conditioner outdoor units to protect fan blades and prevent foreign objects from entering the air conditioner outdoor unit and causing damage to it.

[0003] The existing air outlet grille is composed of annular ribs and radial ribs. Usually, the annular ribs are concentric cylindrical surfaces with the rotation axis as the center, and the spacing between adjacent annular ribs is constant, that is, the annular ribs are evenly spaced. When the system requires a large air volume, the air outlet grille is the main source of resistance in the outdoor unit system. Conventional air outlet grilles cause large system impedance, affect the outdoor unit air volume, and reduce fan efficiency. Therefore, the air outlet of the annular air outlet grille needs to be optimized urgently. Summary of the invention

[0004] The main purpose of the present invention is to provide an air outlet grille and an air conditioner, which are used to at least partially solve the above technical problems.

[0005] In order to solve the above-mentioned problems, the present invention provides an air outlet grille on one hand, comprising: an inner frame, a first rib concentrically arranged with the inner frame, having a diameter larger than that of the inner frame and a gradually increasing diameter, and a second rib connecting a preset number of first ribs and / or inner frames; wherein the spacing between the first ribs gradually increases in the direction from the first rib to the inner frame; and the spacing between the second ribs gradually decreases along this direction.

[0006] Therefore, by gradually reducing the spacing between the second ribs near the inner frame, the strength of the grille near the inner frame can be improved, making it easier to meet the test requirements of the experimental index. In addition, by increasing the spacing between the first ribs of the air outlet grille near the inner frame, the air outlet area can be increased, the air outlet volume can be increased, the system impedance caused by the air outlet grille can be reduced, and the fan efficiency can be improved.

[0007] Optionally, the second ribs include short ribs connecting a preset number of first ribs from outside to inside, and long ribs connecting all the first ribs to the inner frame.

[0008] In this way, the short ribs are not connected to the inner frame, thereby increasing the air outlet area close to the inner frame, and the long ribs connect all the first ribs to the inner frame, thereby ensuring the strength of the air outlet grille.

[0009] Optionally, the number of the short ribs is the same as that of the long ribs, and the short ribs and the long ribs are alternately arranged and evenly distributed along the circumference of the first rib. Adjacent first ribs and adjacent second ribs form an outlet wind, and the outlet winds on the same first rib have the same outlet area.

[0010] The air outlet efficiency is improved by optimizing the number, position and air outlet area of ​​the short and long ribs.

[0011] Optionally, the spacing between the first ribs intersecting the short ribs satisfies the following formula: i =R×d1 / (R-(i-1)×d1); where R is the radius of the first rib with the largest diameter, d1 is the distance between the first and second first ribs from the outside to the inside, i is the i-th first rib from the outside to the inside, d i is the distance between the i-th and i+1-th first ribs.

[0012] Optionally, the spacing between the first ribs intersecting only with the long ribs satisfies the following formula: j =(R×d1 / (R-(j-1)×d1) / 2; where R is the radius of the first rib with the largest diameter, d1 is the distance between the first and second first ribs from the outside to the inside, j is the jth first rib from the outside to the inside, d j is the distance between the jth and j+1th first ribs.

[0013] Through different calculation formulas, it is ensured that the spacing between the first ribs of the air outlet grille near the inner frame gradually increases, thereby increasing the air outlet area and the air outlet volume.

[0014] Optionally, the number of first ribs connected to the short ribs differs from the number of all first ribs by 4 to 8. That is, the difference between the short ribs and the long ribs is 4 to 8 first ribs. If the difference between the short ribs and the long ribs is too large, the strength of the grille is reduced; if the difference is too small, the air outlet area is reduced, the grille resistance is increased, and the fan efficiency is affected.

[0015] Optionally, the spacing between the first ribs is less than or equal to 10 mm, so as to ensure the strength of the air outlet grille.

[0016] Optionally, the first rib is divided into a plurality of arc ribs by the second rib, and along the rotation direction of the fan blade, the distance between the end point of each arc rib and the center of the inner frame gradually increases.

[0017] Optionally, the distance between the endpoint of the arc rib and the center of the inner frame satisfies the following formula: R2=m×R1, wherein R1 is the distance between one endpoint of the arc rib and the center of the inner frame, R2 is the distance between the next endpoint of the arc rib along the rotation direction of the wind blade and the center of the inner frame, and m=1.0~1.2.

[0018] In this way, the air outlet grille is more consistent with the flow direction of the airflow (ie, the rotation direction of the fan blades), reducing the interference of the air outlet grille on the airflow and increasing the air volume.

[0019] Another aspect of the present invention provides an air conditioner, comprising the air outlet grille described above.

[0020] The air conditioner has the same advantages as the above-mentioned air outlet grille, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The schematic diagram of the structure of the air outlet grille provided by one embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of an enlarged view of point A in the air outlet grille provided by an embodiment of the present invention is shown;

[0023] Figure 3 Schematically shows an enlarged view of point B in the air outlet grille provided by an embodiment of the present invention;

[0024] Figure 4 The schematic diagram of the grille structure at the enlarged point A in the air outlet grille provided by an embodiment of the present invention along the rotation direction of the fan blade is shown schematically. Description of the drawings:

[0026] 1-inner frame; 2-first rib; 3-second rib; 4-extension style; 301-short rib; 302-long rib; 401-small extension style; 402-large extension style. DETAILED DESCRIPTION

[0027] In order to make the application purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] The embodiment of the present invention provides an air outlet grille. Figure 1 , and combined with Figures 2 to 4 This embodiment is described in detail.

[0030] It should be noted that the directions or positional relationships indicated by “inside”, “outside”, etc. of each structural component mentioned below refer to the orientations or positional relationships shown in the accompanying drawings; these positional relationships are only for the convenience and simplification of description, and do not indicate or imply that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The air outlet grille provided in this embodiment includes: an inner frame 1, a first rib 2 which is arranged concentrically with the inner frame 1 and has a diameter larger than that of the inner frame 1 and gradually increases in diameter, and a second rib 3 which connects a preset number of first ribs 2 and / or inner frames 1; wherein the spacing between the first ribs 2 gradually increases in the direction from the first rib 2 to the inner frame 1; and the spacing between the second ribs 3 gradually decreases along this direction.

[0032] By gradually reducing the spacing between the second ribs near the inner frame, the strength of the grille near the inner frame can be improved, making it easier to meet the test requirements of the experimental index. In addition, by increasing the spacing between the first ribs of the air outlet grille near the inner frame, the air outlet area can be increased, the air outlet volume can be increased, the system impedance caused by the air outlet grille can be reduced, and the fan efficiency can be improved.

[0033] The first rib 2 mentioned above can be a concentric circular frame arranged concentrically with the inner frame 1. Such a structure takes the air outlet grille as a whole as an example of a circular shape. For example, a top-outlet outdoor unit usually adopts a circular air outlet grille, but the circular overall structure or the circular first rib 2 is only an example of the present invention and cannot be understood as a limitation of the present invention. The specific shape of the first rib 2 can be adaptively adjusted according to actual conditions, such as a rectangular frame, etc.

[0034] In a feasible manner of the embodiment of the present invention, the second rib 3 includes a short rib 301 connecting a preset number of first ribs 2 from outside to inside, and a long rib 302 connecting all the first ribs 2 to the inner frame 1; the number of first ribs 2 connected to the short rib 301 differs from the number of all first ribs 2 by 4 to 8. That is, the short rib 301 is connected to N-4, N-5, N-6, N-7, or N-8 first ribs 2 from the first rib 2 with the largest diameter, that is, the first rib 2 set in the outermost circle, in the direction of the inner frame 1, and the total number of all first ribs 2 is N. There is a difference of 4 to 8 first ribs between the short rib and the long rib. If the difference in the number of first ribs between the short rib and the long rib is too large, the strength of the grille is reduced; if the number is too small, the air outlet area is reduced, the grille resistance is increased, and the fan efficiency is affected.

[0035] For example, the total number of all first ribs 2 is 15, the short rib 301 is connected to the 10 first ribs 2 from the outermost circle inward, and the long rib 302 is connected to the 15 first ribs 2 and to the inner frame 1. At this time, the short rib 301 differs from the long rib 302 by 5 first ribs.

[0036] In another feasible manner of the embodiment of the present invention, the number of the short ribs 301 and the long ribs 302 is the same, and the short ribs 301 and the long ribs 302 are alternately arranged and evenly distributed along the circumference of the first rib 2. Adjacent first ribs 2 and adjacent second ribs 3 form a wind outlet 4, and the wind outlet areas of the wind outlet 4 on the same first rib 2 are equal. Here, when the adjacent second ribs 3 are short ribs 301 and long ribs 302, the wind outlet 4 is Figure 1 The small outlet style 401 shown in FIG. 1 has a small area. When the adjacent second ribs 3 are two long ribs 302, the outlet style 4 is Figure 1 The large outlet wind 402 shown in the figure has a larger area than the small outlet wind 401. The outlet wind efficiency is improved by optimizing the number and position of the short ribs and the long ribs and the outlet wind area.

[0037] Also, see Figure 2 , the spacing between the first ribs 2 intersecting the short ribs 301 satisfies the following formula: d i =R×d1 / (R-(i-1)×d1); where R is the radius of the first rib 2 with the largest diameter, d1 is the distance between the first and second first ribs 2 from the outside to the inside, i is the i-th first rib 2 from the outside to the inside, d i is the distance between the i-th and i+1-th first ribs 2. Figure 3 , the spacing between the first ribs 2 that intersect only with the long ribs 302 satisfies the following formula: d j =(R×d1 / (R-(j-1)×d1) / 2; where R is the radius of the first rib 2 with the largest diameter, d1 is the distance between the first and second first ribs 2 from the outside to the inside, j is the jth first rib 2 from the outside to the inside, d j is the distance between the jth and j+1th first ribs 2. Here, the first first rib 2 from the outside to the inside refers to the outermost first rib 2 with the largest diameter. Through different calculation formulas, it is ensured that the distance between the first ribs close to the air outlet grille at the inner frame gradually increases, thereby increasing the air outlet area and the air outlet volume.

[0038] It should be noted that the spacing between the first ribs 2 is less than or equal to 10 mm. When calculating the spacing between the first ribs using the above two formulas, if the result is greater than 10 mm, it should be set according to 10 mm to avoid excessive spacing between the first ribs and ensure the strength of the air outlet grille. In another feasible manner of the embodiment of the present invention, the first rib 2 is divided into multiple segments of arc ribs by the second rib 3, and the distance between the endpoints of each arc rib and the center of the inner frame 1 gradually increases along the direction of rotation of the fan blade. Specifically, the distance between the endpoint of the arc rib and the center of the inner frame 1 satisfies the following formula: R2 = m × R1, where R1 is the distance between one endpoint of the arc rib and the center of the inner frame, and R2 is the distance between the next endpoint of the arc rib and the center of the inner frame along the direction of rotation of the fan blade, and m = 1.0~1.2.

[0039] Due to the centrifugal force, there is a radial velocity when the airflow passes through the air outlet grille, that is, when rotating along the circumference, the airflow spreads outward and the distance from the rotation axis increases. Figure 4 , the intersection of the first rib 2 and the second rib 3 is M, that is, one end point of this arc rib S is M, and the intersection with the next adjacent second rib 3 along the rotation direction (i.e., along the rotation direction of the fan blade) is M', that is, one end point of this arc rib S is M'. The distance of the arc rib S between M and M' relative to the center of the inner frame 1 increases along the rotation direction ω of the fan blade. The distance at M relative to the center of the inner frame 1 is R1, and the distance at M' relative to the center of the inner frame 1 is R2. R2 = m × R1, m = 1.0 ~ 1.2. Among them, if m is too large, the adjacent first ribs 2 are staggered too much, and the strength of the mesh cover is weakened. R2>R1 makes the first rib 2 of the air outlet grille more in line with the flow direction of the airflow, reduces the interference of the air outlet grille on the airflow, and increases the air volume.

[0040] Embodiment 2

[0041] This embodiment provides an air conditioner, comprising the air outlet grille described in the first embodiment.

[0042] In summary, the present invention adopts a method of gradually reducing the spacing between the second ribs near the inner frame, which can improve the strength of the grille near the inner frame, making it easier to meet the test requirements of the experimental index. In addition, by increasing the spacing between the first ribs of the air outlet grille near the inner frame, the air outlet area can be increased, the air outlet volume can be increased, the system impedance caused by the air outlet grille can be reduced, and the fan efficiency can be improved. In addition, by setting the radius of the first rib to gradually increase along the direction of rotation of the fan blade, the first rib of the air outlet grille is more in line with the flow direction of the airflow, reducing the interference of the air outlet grille on the airflow and increasing the air volume.

[0043] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An air outlet grille, characterized in that: include: An inner frame (1), a first rib (2) which is arranged concentrically with the inner frame (1) and has a diameter greater than that of the inner frame (1) and whose diameter gradually increases, and a second rib (3) which connects a preset number of the first ribs (2) and / or the inner frame (1); Wherein, the spacing between the first ribs (2) gradually increases in the direction from the first rib (2) to the inner frame (1); and the spacing between the second ribs (3) gradually decreases along this direction; The second ribs (3) include short ribs (301) connecting a preset number of first ribs (2) from outside to inside, and long ribs (302) connecting all the first ribs (2) to the inner frame (1); The spacing between the first ribs (2) intersecting the short ribs (301) satisfies the following formula: d i =R×d1 / (R-(i-1)×d1); wherein R is the radius of the first rib (2) with the largest diameter, d1 is the distance between the first and second first ribs (2) from the outside to the inside, i is the i-th first rib (2) from the outside to the inside, d i is the distance between the i-th and i+1-th first ribs (2); The spacing between the first ribs (2) that intersect only with the long ribs (302) satisfies the following formula: d j =(R×d1 / (R-(j-1)×d1) / 2; wherein R is the radius of the first rib (2) with the largest diameter, d1 is the distance between the first and second first ribs (2) from the outside to the inside, j is the jth first rib (2) from the outside to the inside, and d j is the distance between the jth and j+1th first ribs (2).

2. The air outlet grille according to claim 1, characterized in that: The number of the short ribs (301) and the long ribs (302) is the same, and the short ribs (301) and the long ribs (302) are arranged alternately and evenly distributed along the circumference of the first rib (2).

3. The air outlet grille according to claim 1, characterized in that: Adjacent first ribs (2) and adjacent second ribs (3) form an air outlet (4), and the air outlet areas of the air outlets (4) on the same first rib (2) are equal.

4. The air outlet grille according to claim 1, characterized in that: The number of first ribs (2) connected to the short ribs (301) differs from the number of all first ribs (2) by 4 to 8.

5. The air outlet grille according to any one of claims 1 to 4, characterized in that: The spacing between the first ribs (2) is less than or equal to 10 mm.

6. The air outlet grille according to claim 1, characterized in that: The first rib (2) is divided into a plurality of arc ribs by the second rib (3), and along the rotation direction of the fan blade, the distance between the end point of each arc rib and the center of the inner frame (1) gradually increases.

7. The air outlet grille according to claim 6, characterized in that: The distance between the endpoint of the arc rib and the center of the inner frame (1) satisfies the following formula: R2=m×R1, wherein R1 is the distance between one endpoint of the arc rib and the center of the inner frame, R2 is the distance between the next endpoint of the arc rib and the center of the inner frame along the direction of rotation of the fan blade, and m=1.0~1.

2.

8. An air conditioner, characterized in that: It comprises an air outlet grille as described in any one of claims 1 to 7.

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