Outdoor unit grille assembly, air conditioner outdoor unit, air conditioner and control method thereof

Abstract

The present invention provides an outdoor unit grille assembly, an air conditioner outdoor unit, an air conditioner and a control method thereof, belonging to the field of air conditioning technology. The outdoor unit grille assembly includes a grille body having a plurality of vents arranged in a circumferential direction, each vent being provided with a blade, each blade having a flow state allowing flow through the vent and a sealing state blocking flow through the vent, and the blade can be driven to flip inward and outward about its central symmetric axis to switch between the flow state and the sealing state. The present invention can be controlled to be in a sealed state when the fan blades of the outdoor unit are not rotating, effectively preventing external rainwater, dust, insects, etc. from entering the outdoor unit and corroding the fan blades of the outdoor unit or even causing a short circuit in the electrical box mainboard. When the fan blades are rotating, they are controlled to be in a flow state to ensure heat exchange efficiency. By controlling the inward and outward flipping of the blades, the adjustment requirements of different flip angles under different working conditions or weather conditions can be achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular relates to an outdoor unit grille assembly, an air conditioner outdoor unit, an air conditioner and a control method thereof. Background Art

[0002] As a widely used heat dissipation device, the air volume of the outdoor air outlet of the air conditioner has a decisive influence on the heat exchange of the air conditioner. The general grille air outlet is a structure of alternating horizontal and vertical ribs. The wind generated by the fan flows out from the gaps between the ribs. However, since the grille is a fixed structure, it is also in a ventilation state when it is not working. At this time, rain, dust, insects, etc. from the outside will enter through these gaps to corrode the fan blades of the outdoor unit. Insects may also enter the electrical box and cause problems such as short circuit of the motherboard. Summary of the Invention

[0003] Therefore, the present invention provides an outdoor unit grille assembly, an air conditioner outdoor unit, an air conditioner and a control method thereof, which can solve the technical problem in the prior art that the outdoor unit grille assembly adopts a horizontal and vertical alternating rib structure, which is in a normally open state even when the outdoor unit is not in a working state, and there is a risk of external rainwater, dust, insects, etc. entering the outdoor unit through the structure, corroding the outdoor unit fan blades and even causing a short circuit in the electrical box main board.

[0004] In order to solve the above problems, the present invention provides an outdoor unit grille assembly, including a grille body, the grille body having a plurality of vents arranged in a circumferential direction, each of the vents being provided with a blade, each of the blades having a flow state allowing flow through the vent and a sealing state cutting off flow through the vent, the blades being able to be driven to flip inside and outside around their central symmetry axis to switch between the flow state and the sealing state.

[0005] In some embodiments, the first end of the blade has a driving shaft, the driving shaft has a driven gear, the central area of ​​the grille body is provided with a driving device, and the driving device is simultaneously driven and connected to each of the driven gears.

[0006] In some embodiments, the driving device includes a rotary motor and a main driving gear mounted on an output shaft of the rotary motor, and the main driving gear is drivingly connected to the driven gear via an intermediate transmission member.

[0007] In some embodiments, the central area of ​​the grille body has an annular wall having an opening facing away from the grille body, the opening is covered with a pressure plate, and the rotary motor is assembled on the side of the pressure plate facing away from the annular wall.

[0008] In some embodiments, the intermediate transmission member includes a rotating shaft, and both ends of the rotating shaft are rotatably supported on the pressure plate and the grille body, respectively.

[0009] In some embodiments, the intermediate transmission member further includes a first transmission gear and a second transmission gear, wherein the first transmission gear and the second transmission gear are arranged at intervals along the axial direction of the rotating shaft, and the first transmission gear is engaged with the main drive gear teeth, and the second transmission gear is engaged with the driven gear teeth.

[0010] In some embodiments, the second transmission gear is located on a side of the first transmission gear close to the rotary motor; and / or the driven gear and the second transmission gear are both bevel gears, and the main drive gear and the first transmission gear are both spur gears.

[0011] In some embodiments, the transmission ratio between the main drive gear and the first transmission gear is i1, i1=2, and the transmission ratio between the second transmission gear and the driven gear is i2, i2=2.5.

[0012] In some embodiments, the main driving gear has a supporting shaft on a side away from the rotary motor, and the supporting shaft is rotatably supported on the grille body.

[0013] In some embodiments, the pressure plate has a plurality of clamping arms on one side facing the annular wall, and the annular wall has a plurality of clamping slots spaced apart along its circumferential direction, and each of the clamping arms is respectively and correspondingly snap-connected in each of the clamping slots.

[0014] In some embodiments, the annular wall further has a plurality of mating grooves spaced apart along its circumferential direction, each of the drive shafts is accommodated in the mating groove, and the notches of the mating grooves face one side of the pressure plate.

[0015] In some embodiments, the notch of the mating groove is a trumpet-mouth structure, the angle of the trumpet-mouth structure gradually increases toward the side of the pressure plate, the angle of the trumpet-mouth structure is c, 120°≤c≤70°; and / or, the gap between the mating groove and the drive shaft is 0.1mm-0.3mm.

[0016] The present invention also provides an outdoor unit of an air conditioner, comprising the outdoor unit grille assembly.

[0017] The present invention also provides an air conditioner, comprising the above-mentioned air conditioner outdoor unit.

[0018] The present invention also provides a method for controlling an air conditioner, for controlling the operation of the above-mentioned air conditioner, the control method comprising the following steps:

[0019] When a power-on instruction of the air conditioner is obtained, detecting whether the fan blades of the outdoor unit of the air conditioner are rotating;

[0020] If the fan blades are not rotating, controlling the blades to be in the sealed state;

[0021] If the fan blades rotate, the outdoor ambient temperature Ty is further obtained, and according to the obtained outdoor ambient temperature Ty, the flipping angle of the blades is controlled to place the blades in different flow states.

[0022] In some embodiments, if the fan blade rotates, further obtaining the outdoor ambient temperature Ty, and controlling the flip angle of the blade according to the obtained outdoor ambient temperature Ty so that the blade is in different flow states specifically includes:

[0023] When Ty>T1, the blade is controlled to flip to a first angle; or,

[0024] When Ty≤T1, the air conditioner is controlled to enter a low-temperature cooling control mode.

[0025] In some embodiments, when the air conditioner enters the low-temperature cooling control mode, the heat exchanger tube temperature T tube of the air conditioner indoor unit is obtained.

[0026] When T-tube>T2, the blades are controlled to flip to a second angle; or,

[0027] When T2≥Ttube>T3, the blades are controlled to flip to a third angle, and the blades of the air conditioner outdoor unit are controlled to operate at a low windshield; or

[0028] When T3≥T tube>T4, the blade is controlled to flip to a fourth angle, and the fan blade of the air conditioner outdoor unit is controlled to operate at a low windshield, wherein the second angle>the third angle>the fourth angle.

[0029] In some embodiments, the second angle = 90°, the third angle = 70°, the fourth angle = 50°; and / or the first angle = the second angle.

[0030] The present invention provides an outdoor unit grille assembly, an air conditioner outdoor unit, an air conditioner and a control method thereof. The blades in the outdoor unit grille assembly can be controlled to be in a sealed state when the fan blades of the outdoor unit are not rotating, effectively preventing external rainwater, dust, insects, etc. from entering the outdoor unit to corrode the outdoor unit fan blades and even cause a short circuit in the electrical box main board. When the fan blades rotate, they are controlled to be in a flow state to ensure heat exchange efficiency. By controlling the inward and outward flipping of the blades, the flip angle of the blades can also be adjusted to meet the adjustment requirements of different flip angles under different working conditions or weather conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the internal structure of an outdoor unit grille assembly according to an embodiment of the present invention;

[0032] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0033] Figure 3 for Figure 1 A schematic diagram of an axial cross section of the grille body;

[0034] Figure 4 for Figure 3 A top view of

[0035] Figure 5 for Figure 1 A bottom view of the pressure plate in FIG;

[0036] Figure 6 for Figure 5 Top view of the medium pressure plate;

[0037] Figure 7 for Figure 1 A schematic diagram of the structure of the intermediate transmission member;

[0038] Figure 8 Schematic diagram of the driving connection relationship between the grille body, main drive gear and blades;

[0039] Figure 9 This is a schematic diagram of the state when the blades are in a fully open state, that is, the flip angle is 90°;

[0040] Figure 10 FIG. 4 is a control logic flow chart of a method for controlling an air conditioner in another embodiment of the present invention.

[0041] The reference numerals indicate:

[0042] 1. Grille body; 10. Ventilation opening; 11. Ring wall; 111. Clamping groove; 112. Matching groove; 113. Matching hole for main drive gear; 114. Matching hole for first intermediate transmission member; 12. Pressing plate; 121. Clamping arm; 122. Matching hole for second intermediate transmission member; 123. Rotary motor mounting platform; 13. Outer ring; 14. Ribs; 2. Blades; 21. Drive shaft; 22. Driven gear; 31. Rotary motor; 32. Main drive gear; 33. Intermediate transmission member; 331. Rotating shaft; 332. First transmission gear; 333. Second transmission gear. DETAILED DESCRIPTION

[0043] See also Figures 1 to 10As shown, according to an embodiment of the present invention, an outdoor unit grille assembly is provided, including a grille body 1, the grille body 1 has a plurality of vents 10 arranged in a circumferential direction, and each vent 10 is provided with a blade 2. Specifically, the grille body 1 has an outer ring 13 and a plurality of ribs 14 arranged on the inner wall of the outer ring 13 at intervals along the circumferential direction of the outer ring 13. The aforementioned vent 10, which is roughly fan-shaped, is formed between two adjacent ribs 14. The blades 2 are fan-shaped to match the shape of the vent 10. Each blade 2 has a flow state that allows the vent 10 to pass through and a sealing state that cuts off the flow through the vent 10. The blade 2 can be driven to flip inside and outside around its central symmetry axis to switch between the flow state and the sealing state. The aforementioned outer ring 13 is configured with a mounting hole to enable the outdoor unit grille assembly to be assembled with the air conditioner outdoor unit. The aforementioned inside and outside flipping of the blade 2 refers to the inside and outside of the outdoor unit relative to the outdoor unit after the grille assembly is assembled on the air conditioner outdoor unit. Figure 9 As shown, after the blades 2 are driven to flip, part of them are on the outside of the outdoor unit, and the other part is on the inside of the outdoor unit. In this technical solution, the blades 2 in the outdoor unit grille assembly can be controlled to be in a sealed state when the outdoor unit's fan blades are not rotating, effectively preventing rainwater, dust, insects, etc. from entering the outdoor unit and corroding the outdoor unit's fan blades or even causing a short circuit in the electrical box motherboard. When the fan blades are rotating, they are controlled to be in a flow-through state to ensure heat exchange efficiency. By controlling the inward and outward flipping of the blades 2, the flip angle of the blades 2 can also be adjusted to meet the adjustment requirements of different flip angles under different working conditions or weather conditions. Specifically, when the outdoor unit is not working, blade 2 is closed to prevent rain and insects from entering the outdoor unit to protect the fan blades and mainboard. In the high-temperature cooling state, blade 2 is rotated to the position with the maximum ventilation volume to maximize the amount of air that can pass through and increase the heat dissipation efficiency. When in the low-temperature cooling state, when the outdoor temperature and the indoor pipe temperature reach the set conditions, blade 2 gradually rotates to the set closed state, further reducing the air volume of the outdoor unit, while reducing the heat loss of the condenser and increasing the temperature around the condensation side, thereby reducing the heat exchange efficiency of the outdoor unit and achieving the purpose of increasing the evaporation temperature.

[0044] See also Figure 2 As shown, the first end (i.e., the radially inner end) of the blade 2 has a drive shaft 21, and the drive shaft 21 has a driven gear 22. A drive device is provided in the central area of ​​the grille body 1, and the drive device is simultaneously driven and connected to each driven gear 22. The radially inner end of each blade 2 is driven simultaneously by the drive device provided in the central area. A state switching method of multiple blades 2 can be driven simultaneously by using one drive device, which simplifies the structural design and reduces the production cost.

[0045] In some embodiments, the driving device includes a rotary motor 31 and a main drive gear 32 that is mounted on the output shaft of the rotary motor 31. The main drive gear 32 is driven and connected to the driven gear 22 via an intermediate transmission member 33. In a specific embodiment, the central area of ​​the grille body 1 has an annular wall 11, and the inner side of the annular wall 11 forms an accommodating space. The annular wall 11 has an opening on the side away from the grille body 1, that is, the open position of the aforementioned accommodating space. The upper cover of the opening is equipped with a pressure plate 12. The rotary motor 31 is assembled on the side of the pressure plate 12 away from the annular wall 11. Specifically, the pressure plate 12 has a rotary motor mounting platform 123, and the rotary motor 31 is assembled on the rotary motor mounting platform 123. The aforementioned main drive gear 32, intermediate transmission member 33 and driven gear 22 are arranged in the annular wall 11, that is, in the accommodating space and form a seal for the pressure plate 12 to prevent external dust and the like from obstructing the tooth meshing. The rotary motor 31 is outside the accommodating space, which is conducive to the maintenance of the rotary motor 31.

[0046] In some embodiments, the intermediate transmission member 33 includes a rotating shaft 331, and the two ends of the rotating shaft 331 are rotatably supported on the pressure plate 12 and the grille body 1. Specifically, the grille body 1 has a first intermediate transmission member matching hole 114, and the pressure plate 12 has a second intermediate transmission member matching hole. The two ends of the rotating shaft 331 are respectively supported in the above-mentioned two matching holes, thereby achieving a reliable connection of the intermediate transmission member 33. In a preferred embodiment, the intermediate transmission member 33 also includes a first transmission gear 332 and a second transmission gear 333. The first transmission gear 332 and the second transmission gear 333 are arranged at intervals along the axial direction of the rotating shaft 331, and the first transmission gear 332 is meshed with the main drive gear 32, and the second transmission gear 333 is meshed with the driven gear 22. In this way, the two transmission gears are respectively meshed with the main drive gear 32 and the driven gear 22, which has a simple structure and high transmission efficiency; the second transmission gear 333 is located on the side of the first transmission gear 332 close to the rotary motor 31. In this way, the accommodating space in the annular wall 11 can be designed to be relatively thin, and the overall thickness of the grille body 1 can also be designed to be thinner.

[0047] The driven gear 22 and the second transmission gear 333 are both bevel gears, and the main drive gear 32 and the first transmission gear 332 are both spur gears. In this way, the rotation of the rotary motor 31 is ultimately converted into the inward and outward turning of each blade 2. The structure is compact and simple, and the space occupied is relatively small.

[0048] In a specific embodiment, the transmission ratio between the main driving gear 32 and the first transmission gear 332 is i1, i1=2, and the transmission ratio between the second transmission gear 333 and the driven gear 22 is i2, i2=2.5.

[0049] In some embodiments, the main drive gear 32 has a supporting shaft on the side facing away from the rotary motor 31, which is rotatably supported on the grille body 1. Specifically, the grille body 1 also has a main drive gear mating hole 113, on which the main drive gear 32 is supported on the side facing away from the rotary motor 31, ensuring smooth drive transmission. The diameter of each gear mating hole is slightly larger than the corresponding gear shaft, with a recommended clearance of 0.05-0.15 mm.

[0050] The pressure plate 12 has multiple clamping arms 121 on the side facing the annular wall 11, and the annular wall 11 has multiple clamping grooves 111 arranged at intervals along its circumferential direction. Each clamping arm 121 is respectively and one by one snap-fitted into each clamping groove 111. The pressure plate 12 is detachably connected to the corresponding clamping groove 111 through multiple clamping arms 121, which is convenient for assembly. Specifically, each clamping groove 111 is rectangular in shape, and its width is greater than the width of the clamping arm 121 of the pressure plate 12. The single-side gap is recommended to be 0.15-0.25mm to prevent the pressure plate 12 from shaking due to friction when the blade moves. After the pressure plate 12 is installed, the engagement amount of its clamping arm 121 with the grille body 1 (that is, the annular wall 11) is designed to be 1.2-1.5mm, which is convenient for installation and disassembly.

[0051] In some embodiments, the annular wall 11 also has a plurality of mating grooves 112 spaced apart along its circumferential direction, and each drive shaft 21 is accommodated in the mating groove 112, with the notch of the mating groove 112 facing the side of the pressure plate 12. It can be understood that each driven gear 22 is on the inner side of the annular wall 11, and the drive shaft 21 is supported by the mating groove 112. The inward and outward turning of the blade 2 is based on the mating groove 112 as the rotation fulcrum. The gap between the mating groove 112 and the drive shaft 21 is 0.1mm-0.3mm, and lubricating oil can be applied between the two to ensure that there is no jamming during movement.

[0052] In some embodiments, the notch of the matching groove 112 is a bell-mouth structure, and the bell-mouth structure gradually increases in angle toward the side of the pressure plate 12. The bell-mouth structure has an angle of c ( Figure 3 As shown in the figure, the single-side c / 2 is 120°≤c≤70°, that is, the single-side inclination angle is between 60° and 70°. If it is too large, the blade 2 will fall out during rotation, and if it is too small, the blade 2 will be difficult to fit in during installation.

[0053] According to an embodiment of the present invention, there is also provided an air conditioner outdoor unit, comprising the outdoor unit grille assembly described above.

[0054] According to an embodiment of the present invention, there is further provided an air conditioner, comprising the above-mentioned air conditioner outdoor unit.

[0055] According to an embodiment of the present invention, there is also provided a method for controlling an air conditioner, for controlling the operation of the above-mentioned air conditioner, the control method comprising the following steps:

[0056] When the power-on command of the air conditioner is obtained, whether the fan blades of the outdoor unit of the air conditioner are rotating is detected;

[0057] If the fan blades are not rotating, the blade 2 is controlled to be in a sealed state, so that the outdoor unit remains isolated from the outside world, protecting the fan blades and main board of the outdoor unit from erosion or damage;

[0058] If the fan blades rotate, the outdoor ambient temperature Ty is further obtained, and according to the obtained outdoor ambient temperature Ty, the flip angle of the blade 2 is controlled to put the blade 2 in different flow states.

[0059] In some embodiments, if the fan blade rotates, the outdoor ambient temperature Ty is further obtained, and the flip angle of the blade 2 is controlled according to the obtained outdoor ambient temperature Ty so that the blade 2 is in different flow states. Specifically, the process includes:

[0060] When Ty>T1 (in a specific embodiment, T1=15°), the blade 2 is controlled to flip to a first angle; or,

[0061] When Ty≤T1, the air conditioner is controlled to enter the low-temperature cooling control mode.

[0062] When the air conditioner enters the low temperature cooling control mode, the heat exchanger pipe temperature T tube of the air conditioner indoor unit is obtained.

[0063] When T-tube>T2, control blade 2 to flip to a second angle; or,

[0064] When T2≥Ttube>T3, the blade 2 is controlled to flip to a third angle, and the fan blade of the air conditioner outdoor unit is controlled to run at a low windshield; or,

[0065] When T3 ≥ Ttube > T4, blade 2 is controlled to rotate to a fourth angle, and the air conditioner outdoor unit's fan blades are controlled to operate at a low windshield. The second angle > the third angle > the fourth angle, thereby matching the indoor heat exchanger tube temperature with the outdoor blade rotation angle, ensuring cooling reliability and indoor cooling effectiveness. In this technical solution, when in a low-temperature cooling state and the outdoor temperature and indoor tube temperature reach set conditions, blade 2 gradually rotates to a set closed position, further reducing the outdoor unit's air volume, while also lowering heat loss from the condenser and increasing the temperature around the condensing side. This reduces the outdoor unit's heat exchange efficiency and achieves the goal of increasing the evaporation temperature.

[0066] In some embodiments, the second angle = 90°, the third angle = 70°, the fourth angle = 50°; and / or, the first angle = the second angle.

[0067] The control method of the present invention is further described below with reference to a specific embodiment:

[0068] See also Figure 10 As shown,

[0069] Determine whether the fan blades of the air conditioner outdoor unit are rotating. If so, proceed to the next step. Otherwise, the grille remains in a fully closed state (i.e., the blade flip angle is at the 4th gear) to protect the fan blades and main board from corrosion.

[0070] If it rotates, the outdoor ambient temperature (also known as Ty) is obtained and the outdoor ambient temperature is determined to see if it meets the condition of being greater than 15°C (also known as T1). If so, the outdoor grille (also known as blade 2) remains fully open at level 1, maximizing the air outlet area. If this condition is not met, the system enters low-temperature cooling control mode.

[0071] In the low-temperature cooling control mode, the indoor evaporator tube temperature (also known as the T tube mentioned above) is obtained, the indoor evaporator tube temperature is determined, and zone control is performed to ensure reliability and indoor cooling effect.

[0072] Specifically, if the T-tube temperature is greater than 0°C, the air conditioner operates to ensure cooling, with the outdoor unit grille maintained at full open position 1 to maintain airflow. When the temperature is -10°C < T-tube ≤ -5°C, the outdoor air guide grille angle is adjusted to position 3, and the outdoor fan operates at low speed. When the temperature is -5°C < T-tube ≤ 0°C, the outdoor air guide grille angle is adjusted to position 2, and the outdoor fan operates at low speed. The aforementioned low speed operation refers to the rotation speed lower than the corresponding full speed of the fan blades, and the specific speed can be set by the user.

[0073] like Figure 9 As shown, this is a schematic diagram of blade 2 when it is fully open in the first gear. At this time, the angle between blade 2 and the vertical plane is A, where the first gear corresponds to 90°, the second gear corresponds to 70°, the third gear corresponds to 50°, and the fourth gear corresponds to 0°. The fourth gear corresponds to the sealing state of blade 2 mentioned above, and the first to third gears correspond to the flow state of blade 2 mentioned above.

[0074] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0075] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An outdoor unit grille assembly, characterized in that: The invention comprises a grille body (1), wherein the grille body (1) has a plurality of vents (10) arranged in a circumferential direction, each of the vents (10) is provided with a blade (2), each of the blades (2) has a flow state allowing the vents (10) to flow through and a sealing state blocking the flow through the vents (10), and the blades (2) can be driven to flip inside and outside around their central symmetry axis to switch between the flow state and the sealing state; a first end of the blade (2) has a drive shaft (21), and the drive shaft (21) has a driven gear (22); a driving device is provided in the central area of ​​the grille body (1), and the driving device is simultaneously connected to each of the driven gears (22); the driving device comprises a rotary motor (31) and a main driving gear (32) fitted on the output shaft of the rotary motor (31), and the main driving gear (32) is connected to the driven gear (22) via an intermediate transmission member (33); the grille body (1) The central area has an annular wall (11), the annular wall (11) has an opening on a side away from the grille body (1), the opening is covered with a pressure plate (12), and the rotary motor (31) is assembled on the side of the pressure plate (12) away from the annular wall (11); the intermediate transmission member (33) includes a rotating shaft (331), and the two ends of the rotating shaft (331) are rotatably supported on the pressure plate (12) and the grille body (1) respectively; the intermediate transmission member (33) also includes A first transmission gear (332) and a second transmission gear (333) are arranged at intervals along the axial direction of the rotating shaft (331), and the first transmission gear (332) is meshed with the teeth of the main driving gear (32), and the second transmission gear (333) is meshed with the teeth of the driven gear (22); the second transmission gear (333) is located on a side of the first transmission gear (332) close to the rotary motor (31).

2. The outdoor unit grille assembly according to claim 1, characterized in that: The driven gear (22) and the second transmission gear (333) are both bevel gears, and the main drive gear (32) and the first transmission gear (332) are both spur gears.

3. The outdoor unit grille assembly according to claim 1, characterized in that: The transmission ratio between the main drive gear (32) and the first transmission gear (332) is i1, i1=2, and the transmission ratio between the second transmission gear (333) and the driven gear (22) is i2, i2=2.

5.

4. The outdoor unit grille assembly according to claim 1, characterized in that: The main driving gear (32) has a supporting shaft on a side away from the rotary motor (31), and the supporting shaft is rotatably supported on the grille body (1).

5. The outdoor unit grille assembly according to claim 1, characterized in that: The pressure plate (12) has a plurality of clamping arms (121) on one side facing the annular wall (11), and the annular wall (11) has a plurality of clamping slots (111) spaced apart along its circumferential direction, and each of the clamping arms (121) is correspondingly and snap-connected in each of the clamping slots (111).

6. The outdoor unit grille assembly according to claim 1, characterized in that: The annular wall (11) further comprises a plurality of mating grooves (112) spaced apart along its circumferential direction, each of the drive shafts (21) being accommodated in the mating groove (112), with the notches of the mating grooves (112) facing one side of the pressure plate (12).

7. The outdoor unit grille assembly according to claim 6, characterized in that: The notch of the mating groove (112) is in a bell-mouth structure, the bell-mouth structure gradually increases in angle toward one side of the pressure plate (12), the bell-mouth structure has an angle c, 120°≤c≤70°; and / or, the gap between the mating groove (112) and the drive shaft (21) is 0.1mm-0.3mm.

8. An outdoor unit of an air conditioner, characterized in that: The outdoor unit grille assembly comprises the outdoor unit grille assembly according to any one of claims 1 to 7.

9. An air conditioner, characterized in that: Including the air conditioner outdoor unit according to claim 8.

10. A method for controlling an air conditioner, characterized in that: For controlling the operation of the air conditioner according to claim 9, the control method comprises the following steps: When a power-on instruction of the air conditioner is obtained, detecting whether the fan blades of the outdoor unit of the air conditioner are rotating; If the fan blade does not rotate, controlling the blade (2) to be in the sealed state; If the fan blade rotates, the outdoor ambient temperature Ty is further obtained, and according to the magnitude of the obtained outdoor ambient temperature Ty, the flip angle of the blade (2) is controlled to place the blade (2) in different flow states.

11. The control method according to claim 10, characterized in that: If the fan blade rotates, the outdoor ambient temperature Ty is further obtained, and according to the magnitude of the obtained outdoor ambient temperature Ty, the flip angle of the blade (2) is controlled so that the blade (2) is in different flow states. Specifically, the process includes: When Ty>T1, the blade (2) is controlled to flip to a first angle; or, When Ty≤T1, the air conditioner is controlled to enter a low-temperature cooling control mode.

12. The control method according to claim 11, characterized in that: When the air conditioner enters the low temperature cooling control mode, the heat exchanger pipe temperature Tpipe of the air conditioner indoor unit is obtained. When T-tube>T2, the blade (2) is controlled to flip to a second angle; or, When T2≥T pipe>T3, the blade (2) is controlled to flip to a third angle, and the fan blade of the air conditioner outdoor unit is controlled to operate at a low windshield; or, When T3≥T pipe>T4, the blade (2) is controlled to flip to a fourth angle, and the fan blade of the air conditioner outdoor unit is controlled to operate at a low windshield, wherein the second angle>the third angle>the fourth angle.

13. The control method according to claim 12, characterized in that: The second angle=90°, the third angle=70°, the fourth angle=50°; and / or, the first angle=the second angle.

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