CN111288563A

CN111288563A - Grid, outdoor unit and air conditioner

Info

Publication number: CN111288563A
Application number: CN202010106559.8A
Authority: CN
Inventors: 张守信; 李业强; 肖洪力; 陈英强; 吴俊鸿; 陈志伟; 廖敏; 李树云; 李建建; 何博; 黄鑫
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2020-06-16

Abstract

The application provides a grid, an outdoor unit and an air conditioner. This grid 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), a plurality of radial ribs (3) are arranged along the circumference interval of outer lane (2), the one end of spiral rib (4) is connected on inner circle (1), the other end is connected on outer lane (2), the circumference spiral extension of inner circle (1) is followed in spiral rib (4), and with each radial rib (3) fixed connection together. According to the grid of this application, can reduce the windage of rib, promote the discrete type of air current, the increase amount of wind reduces the air-out noise.

Description

Grid, outdoor unit and air conditioner

Technical Field

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

Background

In modern life, the great use of air conditioners improves the comfort of people's life on one hand, and on the other hand, brings huge pressure to energy and environment, and improving the performance of air conditioners as much as possible and reducing the energy consumption of air conditioners are one of the main directions of research in the industry all the time.

The existing outdoor unit of the air conditioner is generally provided with a protective device for children fingers, namely an air outlet grille, at an air outlet for safety consideration. The air-out grid is when playing safety protection and wind-guiding rectification effect, compares in the export and does not have the grid state, comparatively obvious reduction the air output in outdoor unit wind channel, has aggravated the aerodynamic noise of outdoor unit simultaneously. Therefore, the structure and performance optimization of the outlet grille has an important position in the efficient low-noise design of the whole air conditioner.

In the current technology, the shapes of the outlet grill are mainly classified into circular, square and mixed types, wherein the circular shape is most used at present. The circular grille comprises a plurality of radial ribs radiating along the radius and a plurality of concentric annular circumferential ribs, the radial ribs and the circumferential ribs are mutually crossed on the same plane, and a windward surface and an air outlet surface are formed by the end surfaces of the inner side and the outer side of the air outlet of the outdoor unit of the air conditioner.

However, by adopting the circular grating, the annular circumferential ribs can obstruct the air outlet of the air duct, so that the air volume is reduced, and the air outlet noise is increased.

Disclosure of Invention

Therefore, the technical problem that this application will be solved lies in providing a grid, off-premises station and air conditioner, can reduce the windage of rib, promotes the discrete of air current, and the increase amount of wind reduces the air-out noise.

In order to solve the problem, the application provides a grid, including inner circle, outer lane, radial rib and spiral rib, circle including the one end of radial rib is connected, and the other end is connected on the outer lane, and a plurality of radial ribs are arranged along the circumference interval of outer lane, and circle including the one end of spiral rib is connected, and the other end is connected on the outer lane, and the spiral rib extends along the circumference spiral of inner circle to with each radial rib fixed connection together.

Preferably, the number of the spiral ribs is two, and the two spiral ribs are centrosymmetric about the center of the circle of the inner ring.

Preferably, the number q of turns of the helix of a single helical rib satisfies 1 ≦ q ≦ 2.

Preferably, the spiral diameter of the spiral ribs satisfies D2 ≦ D1, wherein D2 is the outer circumferential diameter of the inner ring and D1 is the inner circumferential diameter of the outer ring.

Preferably, a disc is arranged at the inner ring, and the disc is blocked at the inner hole of the inner ring.

Preferably, the cross section of the radial ribs is an aerofoil cross section.

Preferably, the front edge and the rear edge of the airfoil section are both semicircular, the diameter of the semicircular shape of the front edge is d1, the diameter of the semicircular shape of the rear edge is d2, and the ratio of d1/d2 to d2 is 1.2-2.

Preferably, the included angle between the airfoil chord line of the radial rib and the air outlet axis is α, wherein the included angle is equal to or more than 18 degrees and equal to or less than α degrees and equal to or less than 25 degrees.

Preferably, the length of the spiral rib between two adjacent radial ribs is s, the chord length of the radial rib at the section of the spiral rib is c, wherein c/s is more than or equal to 0.8 and less than or equal to 1.7.

According to another aspect of the present application, there is provided an outdoor unit including a grill, which is the above-described grill.

According to another aspect of the present application, there is provided an air conditioner including a grill, which is the grill described above.

The application provides a grid, including inner circle, outer lane, radial rib and spiral rib, circle including the one end of radial rib is connected, and the other end is connected and circles outside, and a plurality of radial ribs are arranged along the circumference interval of outer lane, circles including the one end of spiral rib is connected, and the other end is connected and circles outside, and the spiral rib extends along the circumference spiral of inner circle to with each radial rib fixed connection together. The circumference rib of this grid adopts the circumference rib among the helical line shape spiral rib to replace prior art, can utilize the variable diameter of helix and the characteristics of continuity to reduce the distribution structure characteristics of circumference rib to the hindrance of air current, forms the discreteness that the air current was strikeed to reduce circumference rib to grid circumferencial direction's windage, optimized the structure of arranging of circumference rib and radial rib, increased the amount of wind, reduced the air-out noise.

Drawings

FIG. 1 is a block diagram of a grille according to an embodiment of the present application;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic sectional view taken along line B-B of FIG. 1;

FIG. 4 is a perspective view of a half-section of a grid according to an embodiment of the present application;

FIG. 5 is an enlarged schematic view of the structure at C of FIG. 4;

FIG. 6 is a graph showing the comparison of the air volume of the outdoor unit using the louver of the embodiment of the present invention and the air volume of the conventional outdoor unit at the same rotation speed;

fig. 7 is a graph showing a comparison of noise at the same wind speed between an outdoor unit using the louver of the embodiment of the present invention and a conventional outdoor unit.

The reference numerals are represented as:

1. an inner ring; 2. an outer ring; 3. radial ribs; 4. a spiral rib; 5. a disk.

Detailed Description

Referring to fig. 1 to 7 in combination, according to the embodiment of the present application, the grid 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, a plurality of radial ribs 3 are arranged along the circumference interval of outer lane 2, 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 extends along the circumference spiral of inner circle 1 to with each radial rib 3 fixed connection together.

The circumference rib of this grid adopts spiral line shape's spiral rib 4 to replace the circumference rib among the prior art, can utilize the variable diameter of 4 helices of spiral rib and the characteristics of continuity to reduce the distribution structure characteristics of circumference rib to the hindrance of air current, form the discreteness that the air current strikes to reduce circumference rib to the windage on the grid circumferencial direction, optimized circumference rib and radial rib 3's the structure of arranging, increased the amount of wind, reduced the air-out noise.

Preferably, in the present embodiment, the number of the spiral ribs 4 is two, and the two spiral ribs 4 are symmetrical with respect to the center of the circle of the inner ring 1.

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

Double helix rib can enough guarantee the safety requirement that rib clearance size can pass through the finger for single helix rib, can make spiral rib 4's density suitable simultaneously, can not excessively increase the air-out resistance of grid, can realize the balance of grid security and air-out resistance.

In addition, adopt double helix rib, not only make the global balance nature of grid better, moreover about centrosymmetric structure, can make the air-out of double helix rib more smooth and easy, also more balanced to radial rib 3's fixed connection effect, can reduce the grid better at the windage of circumferencial direction, further promote the discreteness of air current.

In the embodiment, the spiral line turns q of the single spiral rib 4 satisfy 1 ≦ q ≦ 2. Wherein q can be the integer, also can be the decimal, and the design is more nimble, can guarantee to have sufficient joint strength between spiral rib 4 and the radial rib 3, guarantees simultaneously that spiral rib 4's density is more reasonable, and structural performance is better.

The spiral line diameter of the spiral ribs 4 satisfies that D is not less than D1 and not more than D2, 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. Because the inner of spiral rib 4 is connected on the periphery wall of inner circle 1, the outer end is connected on the internal perisporium of outer lane 2, and spiral rib 4 is progressively bigger from the direction diameter of inner towards the outer end, consequently, guarantee that spiral rib 4's spiral diameter D2 is greater than the outer circumference diameter of inner circle 1, and be less than outer lane 2's interior circumference diameter, can make all form good circular arc transition structure between spiral rib 4 and inner circle 1 and the outer lane 2, avoid the unreasonable problem that causes hookup location department structure sudden change of diameter design, guarantee the smooth and easy flow of air current, and be favorable to noise abatement more.

Preferably, a disc 5 is arranged at the inner ring 1, and the disc 5 is blocked at the inner hole of the inner ring 1. This disc 5 can shelter from the hole formation of inner circle 1, avoids causing safe careless omission here, security when further improving the grid and using.

At present, axial flow fan blades are generally used for an outdoor unit of an air conditioner, and the outdoor unit of the air conditioner has the characteristic of divergent air supply, namely, the air flow outwards from an air outlet of the outdoor unit has a rotation angle in the circumferential direction and the radial direction. In the traditional grid design, the aspects of air output, mold stripping and the like are considered, the circumferential radial ribs are changed less, and the radial ribs with variable angles are designed to meet the radial rotating angle of airflow, so that the grid wind resistance is reduced, and the circumferential grid wind resistance is not improved well. This application has replaced former circumference rib through the design of double helix rib, utilizes the variable diameter of helix to reduce the figure of circumference rib, improves the discreteness of air current simultaneously, has reduced the windage on the circumferencial direction, has improved the axial compressor amount of wind, has reduced pneumatic noise, as shown in fig. 6, fig. 7.

The grid of this application is particularly useful for the air-out grid.

The cross section of the radial ribs 3 is an airfoil section. The airfoil optimization is carried out to radial rib 3's cross-section to this application to improved radial rib 3's structural characteristic, the air current is when radial rib 3 of flowing through, and radial leading edge windward angle meets the air current angle of fan blade export, has reduced radial resistance, and the diffusion formula design that radial afterbody contracts makes air current speed reduce, the static pressure increases. The radial ribs 3 drive the airflow to incline in the opposite direction of the peripheral speed, so that the winding speed of the airflow at the outlet of the grating is smaller than that at the inlet, the circumferential rotation kinetic energy of the fan blade is converted into axial kinetic energy, the axial flow air quantity is improved, and the aerodynamic noise is reduced.

The leading edge size of wing section rib is great, can reduce the windward resistance, from leading edge to trailing edge gradual shrinkage, and the trailing edge size is less, and the front and back edge is smooth arc. Because the size of the wing profile from the front edge to the rear edge is reduced, the distance between the adjacent wing profiles is increased, and the effects of reducing the airflow speed and increasing the airflow pressure are achieved.

The front edge and the rear edge of the airfoil section are semicircular, the diameter of the semicircular front edge is d1, the diameter of the semicircular rear edge is d2, wherein d1/d2 is more than or equal to 1.2 and less than or equal to 2, natural transition of the airfoil can be guaranteed, airflow flowing resistance is further reduced, and axial flow air quantity is improved. In this embodiment, on the airfoil section, both ends are semi-circles, the two semi-circles are connected by a smooth curve, and the smooth curve is connected with the semi-circles of the leading edge and the trailing edge in a smooth transition manner.

The contained angle between the airfoil chord line of radial rib 3 and the air-out axis is α, wherein α is more than or equal to 18 degrees and is less than or equal to 25 degrees to can make and carry out the relevance between the design of airfoil chord line and the air-out axis, guarantee to form good matching between the structure of radial rib 4 and the air-out axis, optimize the air-out of grid, further reduce grid air-out resistance, reduce the air-out noise.

The length of the spiral rib 4 between two adjacent radial ribs 3 is s, the chord length of the radial rib 3 at the section of the spiral rib 4 is c, wherein c/s is more than or equal to 0.8 and less than or equal to 1.7. This structure can keep reasonable ratio relation, can effective control runner shape between the adjacent radial rib, improves the mobile state in the runner, avoids appearing the separation phenomenon that flows on the rib surface, can play obvious effect to reducing pneumatic noise.

According to an embodiment of the present application, the outdoor unit includes a louver, which is the louver described above.

According to an embodiment of the present application, an air conditioner includes a grill, which is the grill described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.

Claims

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.