CN111288563A - Grills, outdoor units and air conditioners - Google Patents

Abstract

The present application provides a grill, an outdoor unit and an air conditioner. The grille comprises an inner ring (1), an outer ring (2), a radial rib (3) and a spiral rib (4). One end of the radial rib (3) is connected to the inner ring (1), and the other One end is connected to the outer ring (2), a plurality of radial ribs (3) are arranged at intervals along the circumference of the outer ring (2), one end of the spiral ribs (4) is connected to the inner ring (1), and the other end is connected to the inner ring (1). Connected to the outer ring (2), the helical ribs (4) spirally extend along the circumference of the inner ring (1), and the radial ribs (3) are fixedly connected together. According to the grill of the present application, the wind resistance of the ribs can be reduced, the discrete type of air flow can be improved, the air volume can be increased, and the air outlet noise can be reduced.

Description

Grills, outdoor units and air conditioners

technical field

The present application relates to the technical field of air conditioning, in particular to a grill, an outdoor unit and an air conditioner.

Background technique

In modern life, the extensive use of air conditioners on the one hand improves the comfort of people's lives, and on the other hand brings huge pressure on energy and the environment. Improving the performance of air conditioners as much as possible and reducing the energy consumption of air conditioners has always been a research topic in the industry. one of the main directions.

Existing outdoor units of air conditioners are generally equipped with a protective device for children's fingers, that is, an air outlet grille, at the air outlet for safety reasons. While the outlet grille plays the role of safety protection and air guide and rectification, compared with the state of no grille at the outlet, the outlet air volume of the outdoor unit air duct is obviously reduced, and the aerodynamic noise of the outdoor unit is aggravated at the same time. Therefore, the structure and performance optimization of the outlet grille plays an important role in the high-efficiency and low-noise design of the air conditioner.

In the current technology, the shape of the outlet grille is mainly divided into round, square and hybrid, among which round is the most used now. The circular grille includes a plurality of radial ribs radiating along the radius and concentric annular circumferential ribs. The radial and circumferential ribs intersect each other on the same plane. The end faces together constitute the windward face and the outlet face.

However, when a circular grille is used, the annular circumferential ribs will hinder the air outlet of the air duct, resulting in a decrease in air volume and an increase in air outlet noise.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present application is to provide a grille, an outdoor unit and an air conditioner, which can reduce the wind resistance of the ribs, improve the discrete type of airflow, increase the air volume, and reduce the air outlet noise.

In order to solve the above-mentioned problems, the present application provides a grille, which includes an inner ring, an outer ring, radial ribs and spiral ribs. One end of the radial ribs is connected to the inner ring, and the other end is connected to the outer ring. The radial ribs are arranged at intervals along the circumference of the outer ring, one end of the spiral ribs is connected to the inner ring, and the other end is connected to the outer ring. The strips are firmly connected together.

Preferably, there are two helical ribs, and the two helical ribs are symmetrical about the center of the inner ring.

Preferably, the number of helical coils q of a single helical rib satisfies 1≤q≤2.

Preferably, the helical diameter of the helical rib satisfies D2≤D≤D1, wherein D2 is the diameter of the outer circumference of the inner ring, and D1 is the diameter of the inner circumference of the outer ring.

Preferably, a disc is provided at the inner ring, and the disc is sealed at the inner hole of the inner ring.

Preferably, the cross-section of the radial ribs is an airfoil cross-section.

Preferably, both the leading edge and the trailing edge of the airfoil section are semicircles, the diameter of the semicircle of the leading edge is d1, and the diameter of the semicircle of the trailing edge is d2, where 1.2≤d1/d2≤2.

Preferably, the included angle between the airfoil chord line of the radial rib and the air outlet axis is α, where 18°≤α≤25°.

Preferably, the length of the helical rib between two adjacent radial ribs is s, and the chord length of the radial rib at this section of the helical rib is c, where 0.8≤c/s≤1.7.

According to another aspect of the present application, an outdoor unit is provided, comprising a grille, and the grille is the aforementioned grille.

According to another aspect of the present application, there is provided an air conditioner comprising a grille, the grille being the aforementioned grille.

The grid provided by the application includes an inner ring, an outer ring, radial ribs and spiral ribs. One end of the radial ribs is connected to the inner ring, and the other end is connected to the outer ring. The rings are arranged at intervals in the circumferential direction, one end of the spiral ribs is connected to the inner ring, and the other end is connected to the outer ring. The circumferential rib of the grill adopts helical helical ribs to replace the circumferential ribs in the prior art, and the characteristics of variable diameter and continuity of the helical lines can be used to reduce the obstruction of the air flow due to the distribution structure of the circumferential ribs. , forming the discreteness of airflow impact, thereby reducing the wind resistance of the circumferential ribs to the circumferential direction of the grille, optimizing the arrangement structure of the circumferential ribs and the radial ribs, increasing the air volume and reducing the wind noise.

Description of drawings

1 is a structural diagram of a grid according to an embodiment of the application;

Fig. 2 is the enlarged structural representation at the A place of Fig. 1;

Fig. 3 is the B-B sectional structure schematic diagram of Fig. 1;

FIG. 4 is a half-cut perspective structural view of a grille according to an embodiment of the application;

Fig. 5 is the enlarged structural schematic diagram of the C place of Fig. 4;

6 is a comparison diagram of the air volume of the outdoor unit using the grille according to the embodiment of the present application and the existing outdoor unit at the same rotational speed;

FIG. 7 is a noise comparison diagram of an outdoor unit using the grille according to an embodiment of the present application and an existing outdoor unit under the same wind speed.

Reference numerals are indicated as:

1. Inner ring; 2. Outer ring; 3. Radial ribs; 4. Spiral ribs; 5. Disc.

Detailed ways

1 to 7 , according to an embodiment of the present application, the grid includes an inner ring 1 , an outer ring 2 , a radial rib 3 and a spiral rib 4 , and one end of the radial rib 3 is connected to the inner ring 1, the other end is connected to the outer ring 2, a plurality of radial ribs 3 are arranged at intervals along the circumference of the outer ring 2, one end of the spiral ribs 4 is connected to the inner ring 1, and the other end is connected to the outer ring 2, The helical ribs 4 spirally extend along the circumference of the inner ring 1 , and connect the radial ribs 3 together.

The circumferential rib of the grid adopts the helical helical rib 4 to replace the circumferential rib in the prior art, which can reduce the distribution structure of the circumferential rib by using the characteristics of variable diameter and continuity of the helical line of the helical rib 4 The characteristic hinders the airflow, forming the discreteness of the airflow impact, thereby reducing the wind resistance of the circumferential ribs to the circumferential direction of the grille, optimizing the arrangement structure of the circumferential ribs and the radial ribs 3, and increasing the air volume. Reduced wind noise.

Preferably, in this embodiment, there are two helical ribs 4 , and the two helical ribs 4 are symmetrical with respect to the center of the circle of the inner ring 1 .

In other embodiments, the helical rib 4 in the present application may be a single helical rib or a triple helical rib, or a larger number of ribs by adjusting the pitch, number of turns and diameter of the helical wire.

Compared with the single-spiral rib, the double-spiral rib can not only ensure that the gap size of the rib can pass the safety requirements of fingers, but also make the density of the spiral rib 4 appropriate, and will not excessively increase the air outlet resistance of the grille , which can achieve a balance between grille safety and wind resistance.

In addition, the use of double helical ribs not only makes the overall balance of the grille better, but also makes the air outlet of the double helical ribs smoother with respect to the center-symmetric structure, and the fixed connection effect of the radial ribs 3 is also improved. Balanced, can better reduce the wind resistance of the grille in the circumferential direction, and further improve the discreteness of the airflow.

In this embodiment, the number of helical coils q of a single helical rib 4 satisfies 1≤q≤2. Among them, q can be an integer or a decimal, and the design is more flexible, which can ensure sufficient connection strength between the spiral ribs 4 and the radial ribs 3, and at the same time ensure that the density of the spiral ribs 4 is more reasonable, and the structural performance is better. good.

The diameter of the helical line of the helical rib 4 satisfies D2≤D≤D1, wherein D2 is the diameter of the outer circumference of the inner ring 1 , and D1 is the diameter of the inner circumference of the outer ring 2 . Since the inner end of the spiral rib 4 is connected to the outer peripheral wall of the inner ring 1, and the outer end is connected to the inner peripheral wall of the outer ring 2, and the diameter of the spiral rib 4 is gradually increased from the inner end to the outer end, therefore, Ensure that the helix diameter D2 of the spiral rib 4 is larger than the outer circumference diameter of the inner ring 1 and smaller than the inner circumference diameter of the outer ring 2, so that a good circle can be formed between the spiral rib 4 and the inner ring 1 and the outer ring 2. The arc transition structure avoids the problem of sudden changes in the structure at the connection position caused by unreasonable diameter design, ensures the smooth flow of air flow, and is more conducive to reducing noise.

Preferably, the inner ring 1 is provided with a disk 5 , and the disk 5 is sealed at the inner hole of the inner ring 1 . The disc 5 can form a shield for the inner hole of the inner ring 1, so as to avoid safety omissions here, and further improve the safety of the grille in use.

At present, the outdoor unit of the air conditioner generally uses an axial flow fan blade, which has the characteristics of divergent air supply, that is, the air flow out from the air outlet of the outdoor unit has a rotation angle in the circumferential direction and the radial direction. The traditional grille design takes into account the air output and mold release, etc., the circumferential radial bars are changed less, and the radial ribs are mostly designed as variable-angle radial bars to meet the radial rotation angle of the airflow to reduce the wind resistance of the grille. The wind resistance of the grille has not been improved very well. In the present application, the original circumferential rib is replaced by the double-spiral rib design, the number of circumferential ribs is reduced by the variable diameter of the helix, the discreteness of the airflow is improved, the wind resistance in the circumferential direction is reduced, and the axial flow air volume is increased, Reduced aerodynamic noise, as shown in Figure 6 and Figure 7.

The grilles of the present application are particularly suitable for use in outlet grills.

The section of the radial ribs 3 is an airfoil section. In this application, the airfoil is optimized for the cross section of the radial ribs 3, thereby improving the structural characteristics of the radial ribs 3. When the airflow flows through the radial ribs 3, the windward angle of the radial leading edge meets the airflow at the outlet of the fan blade. Angle, reducing the radial resistance, the radial tail contraction of the diffuser design reduces the airflow velocity and increases the static pressure. The radial rib 3 drives the airflow to incline in the opposite direction of the circumferential speed, so that the swirling speed of the airflow at the grille outlet is lower than that at the inlet, and the circumferential rotational kinetic energy of the fan blades is converted into axial kinetic energy, which increases the axial flow air volume and reduces the Aerodynamic noise.

The size of the leading edge of the airfoil rib is large, which can reduce the wind resistance on the face. It gradually tapers from the leading edge to the trailing edge. Because the airfoil size is reduced from the leading edge to the trailing edge, the spacing between adjacent airfoils becomes larger, which reduces the airflow speed and increases the airflow pressure.

The leading edge and trailing edge of the airfoil section are both semicircular, the diameter of the semicircle at the leading edge is d1, and the diameter of the semicircle at the trailing edge is d2, where 1.2≤d1/d2≤2, which can ensure the natural transition of the airfoil. , to further reduce the airflow resistance and increase the axial airflow. In this embodiment, on the airfoil section, both ends are semicircles, the two semicircles are connected by a smooth curve, and the smooth curve and the semicircles of the leading edge and the trailing edge are all smoothly transitioned connect.

The angle between the airfoil chord line of the radial rib 3 and the air outlet axis is α, where 18°≤α≤25°, so that the design of the airfoil chord line and the air outlet axis can be correlated to ensure A good match is formed between the structure of the radial ribs 4 and the air outlet axis, which optimizes the air outlet of the grille, further reduces the air outlet resistance of the grille, and reduces the air outlet noise.

The length of the spiral rib 4 between two adjacent radial ribs 3 is s, and the chord length of the radial rib 3 at this section of the spiral rib 4 is c, where 0.8≤c/s≤1.7. The structure can maintain a reasonable ratio relationship, can effectively control the shape of the flow channel between adjacent radial ribs, improve the flow state in the flow channel, avoid the phenomenon of flow separation on the surface of the ribs, and can significantly reduce aerodynamic noise. .

According to an embodiment of the present application, the outdoor unit includes a grille, and the grille is the aforementioned grille.

According to an embodiment of the present application, the air conditioner includes a grill, and the grill is the aforementioned grill.

It can be easily understood by those skilled in the art that, on the premise of no conflict, the above advantageous manners can be freely combined and superimposed.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. Inside. The above are only the preferred embodiments of the present application. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present application, several improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of this application.

Claims (11)

1. The utility model provides a grid, its characterized in that includes inner circle (1), outer lane (2), radial rib (3) and spiral rib (4), the one end of radial rib (3) is connected on inner circle (1), the other end is connected on outer lane (2), it is a plurality of radial rib (3) are followed the circumference interval of outer lane (2) is arranged, the one end of spiral rib (4) is connected on inner circle (1), the other end is connected on outer lane (2), spiral rib (4) are followed the circumference spiral of inner circle (1) extends, and with each radial rib (3) fixed connection is in the same place.

2. Grid according to claim 1, characterized in that the number of said spiral ribs (4) is two, the two spiral ribs (4) being centrosymmetric with respect to the center of the circle of the inner ring (1).

3. Grid according to claim 1, characterized in that the number q of turns of the helix of a single helical rib (4) satisfies 1. ltoreq. q.ltoreq.2.

4. Grid according to claim 1, characterized in that the spiral diameter of the spiral ribs (4) satisfies D2 ≦ D1, where D2 is the outer circumferential diameter of the inner ring (1) and D1 is the inner circumferential diameter of the outer ring (2).

5. Grid according to claim 1, characterized in that a disc (5) is provided at the inner ring (1), which disc (5) blocks at the inner hole of the inner ring (1).

6. Grid according to any one of claims 1 to 5, characterized in that the cross section of the radial ribs (3) is an aerofoil cross section.

7. A grid according to claim 6 wherein the aerofoil section has a semi-circular leading edge and a semi-circular trailing edge, the diameter of the semi-circle of the leading edge being d1 and the diameter of the semi-circle of the trailing edge being d2, wherein 1.2. ltoreq. d1/d 2. ltoreq.2.

8. Grille according to claim 6, characterized in that the angle between the airfoil chord line of the radial rib (3) and the outlet air axis is α, wherein 18 ° ≦ α ≦ 25 °.

9. Grid according to claim 6, characterized in that the spiral ribs (4) between two adjacent radial ribs (3) have a length s, and the chord length of the radial rib (3) at the section of the spiral rib (4) is c, wherein c/s is greater than or equal to 0.8 and less than or equal to 1.7.

10. An outdoor unit comprising a grille, wherein the grille is as defined in any one of claims 1 to 9.

11. An air conditioner including a grille, wherein the grille is as claimed in any one of claims 1 to 9.

Images