Grid device, air conditioner outdoor unit and grid control method

Abstract

The invention relates to the technical field of air conditioners, in particular to a grille device, an air conditioner outdoor unit and a grille control method. The grating device comprises a first annular support, a second annular support and a grating, wherein the first annular support is fixedly mounted on a fan side plate of the air conditioner outdoor unit; the second annular support is rotationally installed in the air conditioner outdoor unit and distributed in the same axial direction with the first annular support at intervals; the plurality of grid fan blades are limited between the first annular bracket and the second annular bracket, and surround the center of the second annular bracket to form a disc; and the second annular bracket is used for driving the plurality of grating fan blades to obliquely translate in the radial direction during rotation, so that the centers of the plurality of grating fan blades are opened or closed in the radial direction. The grille fan blades are designed to move in the radial direction so that the center positions of the grille fan blades can be opened or closed, the effect of removing or reserving the air conditioner grille can be achieved, the grille fan blades are opened to reduce or eliminate abnormal noise when abnormal noise prevention is needed, and the grille fan blades are closed to protect internal parts of an air conditioner outdoor unit when abnormal noise prevention is not needed.

Description

Technical Field

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

[0002] With the development of economy and the improvement of quality of life, users have higher and higher requirements for the noise quality of indoor air conditioners. However, under certain working conditions, the outdoor unit of the air conditioner will produce abnormal noise, which has the characteristics of low frequency and high intensity, and will seriously affect the user's experience and physical and mental health.

[0003] After studying the abnormal noise of the air conditioner outdoor unit, it was found that the abnormal noise on the back of the outdoor unit was the most obvious. This noise fluctuates at a lower frequency in terms of hearing. Compared with the normal noise of the air conditioner outdoor unit, the intensity of the abnormal noise varies in a wider range and at a lower frequency, making it easier for the human ear to detect and cause discomfort to the user.

[0004] By analyzing a large amount of noise data of air conditioner outdoor units, it is found that reducing the aerodynamic noise on the fan side can significantly reduce abnormal noise, or even completely eliminate it. In the experiment, it was found that removing the air conditioner grille can significantly reduce the aerodynamic noise on the fan side. However, it is unrealistic to completely remove the air conditioner grille, which will affect the service life of the outdoor unit components and the external aesthetics. Summary of the invention

[0005] The object of the present invention is to provide a grille device, an air conditioner outdoor unit and a grille control method, aiming to solve the problem of abnormal noise in the operation of the existing air conditioner outdoor unit.

[0006] In order to solve the above technical problems, the object of the present invention is achieved through the following technical solutions: a grille device is provided, which is arranged on the fan side of the air conditioner outdoor unit, and the grille device includes:

[0007] A first annular bracket is fixedly mounted on a fan side plate of the air conditioner outdoor unit;

[0008] A second annular bracket is rotatably mounted inside the air conditioner outdoor unit and is spaced apart from the first annular bracket in the same axial direction;

[0009] A plurality of grille fan blades are located between the first annular support and the second annular support and surround the center of the second annular support to form a disk;

[0010] Wherein, the second annular bracket is used to drive the plurality of grille fan blades to tilt and translate in a radial direction when rotating, so that the centers of the plurality of grille fan blades are opened or closed in a radial direction.

[0011] Furthermore, the first annular support has a plurality of strip-shaped grooves distributed along the circumferential direction, and the plurality of strip-shaped grooves are arranged to extend obliquely along the radial outer direction;

[0012] A sliding convex strip is provided on the side of the grille fan blade facing away from the second annular bracket, and a plurality of grille fan blades are respectively limited in a plurality of strip-shaped grooves by the sliding convex strip.

[0013] Furthermore, the second annular bracket is provided with a plurality of arc-shaped slots distributed along the circumferential direction, and the plurality of arc-shaped slots are arranged to extend obliquely along the radial outer direction;

[0014] A protrusion is provided on one side of the grille fan blade facing away from the first annular bracket, and a plurality of grille fan blades are respectively restricted in a plurality of arc-shaped slots by the protrusion.

[0015] Furthermore, the grille device also includes a driving member arranged inside the air conditioner outdoor unit; the driving member is used to drive the second annular bracket to rotate and link the center position between the multiple grille fan blades to open or close.

[0016] Furthermore, an annular gear ring is provided on the outer peripheral side of the second annular bracket; the driving member includes a rotating gear, and the rotating gear is meshedly connected with the annular gear ring of the second annular bracket.

[0017] An embodiment of the present invention further provides an air conditioner outdoor unit, comprising the grille device as described above.

[0018] The embodiment of the present invention further provides a grille control method, which is applied to the air conditioner outdoor unit as described above, and the grille control method includes:

[0019] Obtaining the current operating condition of the air conditioner outdoor unit when it is running;

[0020] Confirm the operating load range corresponding to the current operating conditions;

[0021] According to the operating load range corresponding to the current operating condition, the second annular bracket is controlled to rotate accordingly and the plurality of grille blades are linked to tilt and translate radially, so that the center position between the plurality of grille blades is opened or closed in the radial direction.

[0022] Further, according to the operating load range corresponding to the current operating condition, controlling the second annular bracket to rotate accordingly and linking the plurality of grille blades to tilt and translate radially, so that the center position between the plurality of grille blades is opened or closed in the radial direction, includes:

[0023] When the current operating condition corresponds to the first operating load range, the second annular bracket is controlled to rotate and link the plurality of grille fins to tilt and translate radially inwardly, so that the center position between the plurality of grille fins is completely closed.

[0024] Further, according to the operating load range corresponding to the current operating condition, controlling the second annular bracket to rotate accordingly and linking the plurality of grille blades to tilt and translate radially, so that the center position between the plurality of grille blades is opened or closed in the radial direction, includes:

[0025] When the current operating condition corresponds to the second operating load range, the second annular bracket is controlled to rotate and link the multiple grille fan blades to tilt and translate radially inward so that the center position between the multiple grille fan blades is opened to half; wherein the second operating load range is greater than the first operating load range.

[0026] Further, according to the operating load range corresponding to the current operating condition, controlling the second annular bracket to rotate accordingly and linking the plurality of grille blades to tilt and translate radially, so that the center position between the plurality of grille blades is opened or closed in the radial direction, includes:

[0027] When the current operating condition corresponds to the third operating load range, the second annular bracket is controlled to rotate and link multiple grille fan blades to tilt and translate radially inward so that the center position between the multiple grille fan blades is fully opened; wherein the third operating load range is greater than the second operating load range.

[0028] The beneficial effects of the embodiments of the present invention are as follows: the present invention designs multiple grille fan blades to be movable in the radial direction, so that the center positions of the multiple grille fan blades can be opened or closed, thereby achieving the effect of removing or retaining the air-conditioning grille; when it is necessary to prevent abnormal noise, it is opened to reduce or eliminate abnormal noise; when it is not necessary to prevent abnormal noise, it is closed to protect the internal components of the air-conditioning outdoor unit, and it will not affect the external aesthetics. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of the overall structure of an air conditioner outdoor unit provided in an embodiment of the present invention.

[0031] Figure 2 A schematic diagram of the internal structure of an air conditioner outdoor unit provided in an embodiment of the present invention.

[0032] Figure 3 A schematic diagram of an exploded structure of a grille device provided in an embodiment of the present invention.

[0033] Figure 4Another exploded structural schematic diagram of the grille device provided in an embodiment of the present invention.

[0034] Figure 5 A schematic structural diagram of a grille device (fully closed state) provided in an embodiment of the present invention.

[0035] Figure 6 A schematic structural diagram of a grille device (half-open state) provided in an embodiment of the present invention.

[0036] Figure 7 A schematic structural diagram of a grille device (fully open state) provided in an embodiment of the present invention.

[0037] Figure 8 A schematic flow chart of a grid control method provided in an embodiment of the present invention.

[0038] Fig. 9 A schematic diagram of a sub-process of a grid control method provided in an embodiment of the present invention.

[0039] Description of the symbols in the figure:

[0040] 1. a first annular bracket; 11. a strip-shaped groove;

[0041] 2. Second annular bracket; 21. Arc-shaped slot;

[0042] 3. disc; 31. grille fan blade; 311. sliding convex strip; 312. raised portion;

[0043] 4. Rotating gear;

[0044] 5. Air conditioner outdoor unit; 51. Fan side panel. DETAILED DESCRIPTION

[0045] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0046] In the description of the present invention, it should be clarified that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, but are not necessarily used to describe a specific order or sequence; the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "horizontal", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, and do not mean that the referred device or element must have a specific direction or position, and therefore cannot be understood as a limitation on the present invention.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] like Figures 1 to 7 The embodiment of the present invention provides a grille device, which is arranged on the fan side of the air conditioner outdoor unit 5, and the grille device includes:

[0049] The first annular bracket 1 is fixedly mounted on the fan side plate 51 of the air conditioner outdoor unit 5;

[0050] The second annular bracket 2 is rotatably mounted inside the air conditioner outdoor unit 5 and is spaced apart from the first annular bracket 1 in the same axial direction;

[0051] A plurality of grille blades 31 are located between the first annular support 1 and the second annular support 2 and surround the center of the second annular support 2 to form a disk 3;

[0052] The second annular bracket 2 is used to drive the plurality of grille blades 31 to tilt and translate in a radial direction when rotating, so that the centers of the plurality of grille blades 31 are opened or closed in the radial direction.

[0053] In this embodiment, the first annular bracket 1 and the second annular bracket 2 are both in the shape of a circular ring with an opening in the middle. The first annular bracket 1 is fixedly mounted on the fan side plate 51 of the air conditioner outdoor unit 5. The first annular bracket 1 can also be integrally formed with the fan side plate 51 (i.e., an opening is provided on the fan side plate 51, and the plurality of grille blades 31 are limited between the second annular bracket 2 and the fan side plate 51). The second annular bracket 2 can be rotatably mounted on the fan side plate 51, or can be rotatably mounted on the fan bracket inside the air conditioner outdoor unit 5. The shape of the grille blade 31 is fan-shaped, and the disk 3 formed by the plurality of grille blades 31 corresponds to the middle position of the first annular bracket 1 and the second annular bracket 2. Therefore, the plurality of grille blades 31 are designed to be movable in the radial direction, so that the center position of the plurality of grille blades 31 (i.e., the center position of the disk 3) can be opened or closed.

[0054] The first annular bracket 1 and the second annular bracket 2 are both in the shape of a ring with an opening in the middle. The first annular bracket 1 is fixedly mounted on the fan side plate 51 of the air conditioner outdoor unit 5, and can also be integrally cast with the fan side plate 51 (i.e., an opening is reserved on the fan side plate 51, and the plurality of grille blades 31 are limited between the second annular bracket 2 and the fan side plate 51). The second annular bracket 2 can be flexibly rotatably mounted on the fan side plate 51 or the fan bracket inside the air conditioner outdoor unit 5. The grille blades 31 are designed in a fan shape. When the plurality of grille blades 31 are enclosed, they form a disc 3, and its position just corresponds to the central area of ​​the first annular bracket 1 and the second annular bracket 2. Therefore, if these grille blades 31 are designed to be movable in the radial direction, the opening and closing function of the center position of the plurality of grille blades 31 (i.e., the center position of the disc 3) can be realized.

[0055] Specifically, when the air conditioner outdoor unit 5 has abnormal noise or it is predicted that such noise will occur, by driving the second annular bracket 2 to rotate (for example, along the first circumferential direction), the plurality of grille fins 31 are driven to tilt and translate radially outward, so that the center positions of the plurality of grille fins 31 are opened in the radial direction, which is equivalent to the effect of removing the air conditioner grille, effectively reducing the aerodynamic noise on the fan side, so as to achieve the purpose of reducing or even completely eliminating the abnormal noise. Conversely, it can be understood that when the air conditioner outdoor unit 5 is not running or there is no abnormal noise during operation or it is predicted that there will be no abnormal noise, by driving the second annular bracket 2 to rotate (in the second circumferential direction opposite to the first circumferential direction), the plurality of grille fins 31 are driven to tilt and translate radially inward, so that the center positions of the plurality of grille fins 31 are closed in the radial direction, and the air conditioner grille is restored to a normal state, which will neither affect the service life of the components of the air conditioner outdoor unit 5 nor the external aesthetics.

[0056] In one embodiment, a plurality of strip grooves 11 are distributed circumferentially on the first annular bracket 1, and the plurality of strip grooves 11 are obliquely extended along the radial outer direction; a sliding protrusion 311 is provided on the side of the grille fan blade 31 facing away from the second annular bracket 2, and the plurality of grille fan blades 31 are respectively limited in the plurality of strip grooves 11 by the sliding protrusion 311.

[0057] In this embodiment, a plurality of strip grooves 11 are evenly distributed along the circumference of the first annular bracket 1, and these strip grooves 11 present a certain inclination angle along the radial outer direction, thereby forming a special structural layout. At the same time, a sliding ridge 311 is designed on the side of each grille fan 31 away from the second annular bracket 2 (i.e., the side in contact with the first annular bracket 1). The function of these sliding ridges 311 is to ensure that each grille fan 31 can slide smoothly and be positioned in the corresponding strip groove 11. In this way, a plurality of grille fan fins 31 can be respectively limited to a plurality of strip grooves 11, and the strip grooves 11 serve as a guide structure for the grille fan fins 31, which can guide each grille fan fin 31 to move in a radially inner and outer direction while tilting and translating, thereby realizing the opening and closing of the central area of ​​the plurality of grille fan fins 31.

[0058] In one embodiment, a plurality of arc-shaped slots 21 are distributed circumferentially on the second annular bracket 2, and the plurality of arc-shaped slots 21 are obliquely extended along the radial outer direction; a protrusion 312 is provided on the side of the grille fan blade 31 facing away from the first annular bracket 1, and the plurality of grille fan blades 31 are respectively limited in the plurality of arc-shaped slots 21 by the protrusion 312.

[0059] In this embodiment, on the outer edge of the second annular bracket 2, a plurality of arc-shaped slots 21 are evenly distributed along its circumference, and these arc-shaped slots 21 extend radially outwardly and obliquely, forming a specific structural layout. At the same time, a protrusion 312 is specially designed on the side of each grille fan 31 away from the first annular bracket 1 (i.e., the side in contact with the second annular bracket 2); the protrusion 312 of each grille fan 31 is inserted into the corresponding arc-shaped slot 21; based on this, when the second annular bracket 2 is driven to rotate, the arc-shaped slot 21 on the second annular bracket 2 can drive the protrusion 312 to rotate radially around the center of the plurality of grille fan 31, so that the protrusion 312 transmits power to the plurality of grille fan 31, and the plurality of grille fan 31 translates along the corresponding strip grooves 11 on the first annular bracket 1, so that the central area of ​​the plurality of grille fan 31 is opened and closed.

[0060] Furthermore, the sliding protrusions 311 and the protrusions 312 on both sides of the grille fan blades 31 are respectively connected to the first annular bracket 1 and the second annular bracket 2 to limit the movement of the grille fan blades 31, thereby achieving stable opening and closing of multiple grille fan blades 31.

[0061] In one embodiment, the grille device further includes a driving member disposed inside the air conditioner outdoor unit 5; the driving member is used to drive the second annular bracket 2 to rotate, and link the central position between the plurality of grille blades 31 to open or close. Specifically, the driving member includes a rotating gear 4, and an annular gear ring is disposed on the outer peripheral side of the second annular bracket 2; the rotating gear 4 is meshedly connected with the annular gear ring of the second annular bracket 2.

[0062] In this embodiment, the driving member includes a rotating gear 4, which is designed to be tightly meshed with the annular gear ring provided on the outer peripheral side of the second annular bracket 2; this meshing connection ensures that the rotating gear 4 can smoothly transmit power during the driving process, so that the second annular bracket 2 can rotate smoothly; through this precise mechanical matching, the center position between the grille blades 31 can be effectively controlled, thereby achieving precise adjustment of the aerodynamic noise on the fan side. The design of the entire grille device fully considers the reliability of mechanical transmission and the convenience of operation, ensuring the efficient operation of the air conditioning system.

[0063] Furthermore, the rotating gear 4 can be driven by a motor, and the motor can be installed on the fan bracket or the fan side plate 51.

[0064] The embodiment of the present invention further provides an air-conditioning outdoor unit 5, comprising the above grille device.

[0065] See also Figure 8 , the embodiment of the present invention further provides a grille control method, which is applied to the above air conditioner outdoor unit 5, and the grille control method includes steps S801 to S803;

[0066] S801, obtaining the current operating condition of the air conditioner outdoor unit 5 when it is running;

[0067] S802, confirming the operating load range corresponding to the current operating condition;

[0068] S803. According to the operating load range corresponding to the current operating condition, control the second annular bracket 2 to rotate accordingly and link the multiple grille blades 31 to tilt and translate radially, so that the center position between the multiple grille blades 31 is opened or closed in the radial direction.

[0069] In this embodiment, the current operating condition of the air conditioner outdoor unit 5 is obtained when it is running. The current operating condition includes the current fan speed and the current compressor frequency. The higher the current fan speed and the current compressor frequency, the greater the load, and the more likely it is to cause abnormal noise on the fan side. Therefore, the abnormal noise can be experimentally tested in advance, by collecting abnormal noise data under different operating conditions (i.e., different fan speeds and compressor frequencies), and controlling the second annular bracket 2 to adjust the opening of the center of the grille fan 31 to the optimal opening that can reduce or eliminate abnormal noise, and record it in the controller; in this way, when the air conditioner outdoor unit 5 runs to the corresponding operating condition, the controller controls the second annular bracket 2 to drive the grille fan 31 to adjust to the corresponding opening, thereby achieving the effect of reducing or eliminating abnormal noise. Specifically, multiple operating load ranges can be designed, each operating load range corresponds to an opening of the grille fan 31, and the opening can be expressed in percentage. For example, 11 operating load ranges are designed, corresponding to 11 openings of 0%, 10%, 20%...90% and 110%, and the specific load ranges and the number of opening sizes are not specifically limited; that is, the present embodiment can dynamically adjust the opening size of the center of the grille fan 31 as the operating conditions change.

[0070] More specifically, by obtaining the current operating conditions of the air-conditioning outdoor unit 5, the corresponding opening of the grille fan 31 can be matched, and then the second annular bracket 2 is driven to rotate (for example, along the first circumferential direction), driving the multiple grille fan 31 to tilt and translate in the radial direction, so that the center positions of the multiple grille fan 31 move in the radial direction and reach the corresponding opening, thereby achieving the effect of reducing or eliminating abnormal noise.

[0071] In one embodiment, if Fig. 9 As shown, step S803 includes:

[0072] S901, when the current operating condition corresponds to the first operating load range, control the second annular bracket 2 to rotate and link the plurality of grille blades 31 to tilt and translate radially inward, so that the center position between the plurality of grille blades 31 is completely closed;

[0073] S902. When the current operating condition corresponds to the second operating load range, control the second annular bracket 2 to rotate and link the multiple grille fan blades 31 to tilt and translate radially inward so that the center position between the multiple grille fan blades 31 is opened to half; wherein the second operating load range is greater than the first operating load range.

[0074] S903. When the current operating condition corresponds to the third operating load range, control the second annular bracket 2 to rotate and link the multiple grille fan blades 31 to tilt and translate radially inward so that the center position between the multiple grille fan blades 31 is fully opened; wherein the third operating load range is greater than the second operating load range.

[0075] like Figures 5 to 7 , this embodiment is explained by designing three operating load ranges as an example, that is, the current operating condition can correspond to one of the first operating load range, the second operating load range and the third operating load range, and the corresponding openings are closed, half-open and fully open respectively. For example, if the current fan speed is 700Hz and the current compressor frequency is 80Hz, which corresponds to the first operating load range, the opening of the grille fan 31 is closed (i.e. 0%); if the current fan speed is 725Hz and the current compressor frequency is 100Hz, which corresponds to the second operating load range, the opening of the grille fan 31 is half-open (i.e. 50%); if the current fan speed is 750Hz and the current compressor frequency is 115Hz, which corresponds to the third operating load range, the opening of the grille fan 31 is fully open (i.e. 100%).

[0076] Based on the grille control method introduced above, this grille control method must be repeated every time the frequency and fan speed change occurs when the air-conditioning outdoor unit 5 is running, so as to control the opening size of the grille fan blades 31, thereby achieving the effect of reducing or eliminating abnormal noise to ensure better sound quality performance.

[0077] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the method described above can refer to the corresponding process in the aforementioned device embodiment, and will not be repeated here.

[0078] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A grille device, arranged on the fan side of an air conditioner outdoor unit, characterized in that: include: A first annular bracket is fixedly mounted on a fan side plate of the air conditioner outdoor unit; A second annular bracket is rotatably mounted inside the air conditioner outdoor unit and is spaced apart from the first annular bracket in the same axial direction; A plurality of grille fan blades are located between the first annular support and the second annular support and surround the center of the second annular support to form a disk; Wherein, the second annular bracket is used to drive the plurality of grille fan blades to tilt and translate in a radial direction when rotating, so that the centers of the plurality of grille fan blades are opened or closed in a radial direction.

2. The grille device according to claim 1, characterized in that: The first annular support has a plurality of strip-shaped grooves distributed along the circumferential direction, and the plurality of strip-shaped grooves are arranged to extend obliquely along the radial outer direction; A sliding convex strip is provided on the side of the grille fan blade facing away from the second annular bracket, and a plurality of grille fan blades are respectively limited in a plurality of strip-shaped grooves by the sliding convex strip.

3. The grille device according to claim 1, characterized in that: The second annular bracket is provided with a plurality of arc-shaped slots distributed along the circumferential direction, and the plurality of arc-shaped slots are arranged to extend obliquely along the radial outer direction; A protrusion is provided on one side of the grille fan blade facing away from the first annular bracket, and a plurality of grille fan blades are respectively restricted in a plurality of arc-shaped slots by the protrusion.

4. The grille device according to claim 1, characterized in that: It also includes a driving member arranged inside the air conditioner outdoor unit; the driving member is used to drive the second annular bracket to rotate and link the center position between the multiple grille fan blades to open or close.

5. The grille device according to claim 4, characterized in that: An annular gear ring is provided on the outer peripheral side of the second annular bracket; the driving member includes a rotating gear, and the rotating gear is meshedly connected with the annular gear ring of the second annular bracket.

6. An air conditioner outdoor unit, characterized in that: It comprises a grille device as claimed in any one of claims 1 to 5.

7. A grille control method, applied to the air conditioner outdoor unit according to claim 6, characterized in that: The grid control method comprises: Obtaining the current operating condition of the air conditioner outdoor unit when it is running; Confirm the operating load range corresponding to the current operating conditions; According to the operating load range corresponding to the current operating condition, the second annular bracket is controlled to rotate accordingly and the plurality of grille blades are linked to tilt and translate radially, so that the center position between the plurality of grille blades is opened or closed in the radial direction.

8. The grille control method according to claim 7, characterized in that: According to the operating load range corresponding to the current operating condition, controlling the second annular bracket to rotate accordingly and linking the plurality of grille blades to tilt and translate radially so that the center position between the plurality of grille blades is opened or closed in the radial direction includes: When the current operating condition corresponds to the first operating load range, the second annular bracket is controlled to rotate and link the plurality of grille fins to tilt and translate radially inwardly, so that the center position between the plurality of grille fins is completely closed.

9. The grille control method according to claim 8, characterized in that: According to the operating load range corresponding to the current operating condition, controlling the second annular bracket to rotate accordingly and linking the plurality of grille blades to tilt and translate radially so that the center position between the plurality of grille blades is opened or closed in the radial direction includes: When the current operating condition corresponds to the second operating load range, the second annular bracket is controlled to rotate and link the multiple grille fan blades to tilt and translate radially inward so that the center position between the multiple grille fan blades is opened to half; wherein the second operating load range is greater than the first operating load range.

10. The grille control method according to claim 9, characterized in that: According to the operating load range corresponding to the current operating condition, controlling the second annular bracket to rotate accordingly and linking the plurality of grille blades to tilt and translate radially so that the center position between the plurality of grille blades is opened or closed in the radial direction includes: When the current operating condition corresponds to the third operating load range, the second annular bracket is controlled to rotate and link multiple grille fan blades to tilt and translate radially inward so that the center position between the multiple grille fan blades is fully opened; wherein the third operating load range is greater than the second operating load range.

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