Grid assembly and air conditioner

Abstract

The utility model provides a grille assembly and an air conditioner, the air conditioner comprises the grille assembly, the grille assembly comprises a basic grille and a rotating grille set, and the basic grille comprises basic radial ribs; the rotating grating set comprises at least four rotating gratings, each rotating grating comprises a rotating radial rib, the basic grating and the rotating gratings are concentrically overlapped, any two rotating gratings can rotate relatively, and the basic radial ribs extend in the axial direction and pass through all the rotating gratings. When the grille assembly is in an open state, the rotating radial ribs of the multiple rotating grilles are overlapped in the axial direction. When the grille assembly is in a closed state, the rotating radial ribs of the rotating grilles are staggered and adjacently connected to the two basic radial ribs end to end. The air supply quantity requirement and the blocking protection requirement are met at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field, concretely relates to a grating assembly and air conditioner. BACKGROUND

[0002] The existing air conditioner outdoor unit includes a shell and a grating assembly installed at the shell air outlet, the grating assembly includes a fixed grating and a rotating grating, the rotating grating is concentrically arranged with the fixed grating and the two share a center as the rotation center of the rotating grating, the fixed grating is provided with a plurality of first radial ribs arranged uniformly and equidistantly along the circumferential direction, and the rotating grating is provided with a plurality of rotating radial ribs arranged uniformly and equidistantly along the circumferential direction.

[0003] Referring to Figure 1 , when the rotating radial rib 912 overlaps with the first radial rib 911, the grating assembly is in an open state to form an air outlet passage 910 connecting the inside and outside of the outdoor unit, referring to Figure 2 , the rotating grating rotates to make the rotating radial rib 912 and the first radial rib 911 dislocated, and the rotating radial rib 912 of the rotating grating can block the air outlet passage 910, which can prevent foreign matters from entering the machine body in the off state. However, as shown in Figure 1 , the existing grating assembly provided with a fixed grating and a rotating grating has the problem that the first radial rib 911 occupies about half of the area of the grating assembly, and relatively, only half of the area of the grating assembly is used as the air outlet passage 910, which affects the air supply volume.

[0004] Referring to Figure 3 , it is assumed that two rotating gratings are provided to increase the area of the air outlet passage. The grating assembly includes a fixed grating, a first rotating grating and a second rotating grating arranged in sequence along the axial direction, the fixed grating includes a first radial rib 921, the first rotating grating includes a rotating radial rib 922, and the second rotating grating includes a third radial rib 923, which divides the total area of the grating assembly into three equal parts, and two-thirds of the area can be used as the air outlet passage 920. Of course, by providing more rotating gratings, the area of the air outlet passage can be further increased. However, in fact, when two or more rotating gratings are provided, it will be impossible to achieve dislocation blocking, referring to Figure 4 and Figure 2 , when the first radial rib 921, the rotating radial rib 922 and the third radial rib 923 are dislocated in sequence, although the air outlet passage 920 is blocked in the axial direction, the air outlet passage still connects the inside and outside of the grating assembly along the inclined direction, and thus the dislocation blocking cannot be completed as shown in Figure 2 .

[0005] It can be seen that the existing grating assembly cannot meet the requirements of air supply volume and blocking protection at the same time. UTILITY MODEL CONTENT

[0006] The first purpose of the utility model lies in providing a grille assembly which meets the air supply volume requirement and the sealing protection requirement.

[0007] The second purpose of the utility model lies in providing an air conditioner which meets the air supply volume requirement and the sealing protection requirement.

[0008] The grille assembly provided by the first purpose of the utility model comprises a basic grille and a rotating grille group, the basic grille comprises basic radial ribbons arranged along the circumferential direction of the basic grille, the rotating grille group comprises at least four rotating grilles, each rotating grille comprises rotating radial ribbons arranged along the circumferential direction of the rotating grille, the basic grille and the rotating grilles are concentrically arranged and sequentially arranged along the axial direction, any two rotating grilles can rotate relative to each other, and at least part of the rotating grilles can rotate relative to the basic grille; the basic radial ribbons extend along the axial direction and pass through all the rotating grilles; when the grille assembly is in an open state, the rotating radial ribbons of the rotating grilles are stacked along the axial direction; when the grille assembly is in a closed state, the rotating radial ribbons of the rotating grilles are misaligned, and the rotating radial ribbon of one of the rotating grilles is adjacent to one of the two adjacent basic radial ribbons, and the rotating radial ribbon of another rotating grille is adjacent to the other of the two adjacent basic radial ribbons.

[0009] As can be seen from the above scheme, the basic radial ribbons of the basic grille extend along the axial direction to a sufficient height to ensure the space blocking effect in the circumferential direction, and in the closed state, the misaligned rotating radial ribbons are respectively adjacent to the two basic radial ribbons at the head and tail, so that the air exhaust channel is no longer connected between the two sides of the grille in the inclined direction, and the sealing effect is ensured. However, further, the basic radial ribbons under this improvement cannot be stacked with the rotating radial ribbons, so that in the open state, all the stacked rotating radial ribbons will occupy an additional area, if the number of rotating grilles is three, only half of the area on the grille assembly is used as the air exhaust channel, and if the number of rotating grilles is two, the area used as the air exhaust channel is smaller, so that the air supply volume cannot be improved. Therefore, the utility model sets four or more rotating grilles, so that the area used as the air exhaust channel is increased to improve the air supply volume.

[0010] A further scheme is that the rotating grille group comprises at least five rotating grilles, and the number of rotating grilles is odd; the rotating grilles comprise a middle grille in the middle of the sequence, the rotating grilles comprise a front grille arranged between the basic grille and the middle grille, and the rotating grilles comprise a rear grille away from the basic grille than the middle grille; the rotating radial ribbons of the middle grille are middle radial ribbons, and in the circumferential direction, the middle radial ribbons are located in the middle position of the two adjacent basic radial ribbons when the grille assembly is in the open state or in the closed state.

[0011] From the above, under this setting, during the change of the grid assembly between the open state and the closed state, the middle grid and the base grid do not need to move, both can be set as fixed grid, this setting can reduce the setting of the drive unit and the transmission assembly, simplify the structure, reduce the setting difficulty and reduce the cost.

[0012] Further, the front grid and the rear grid can rotate relative to the base grid; the grid assembly includes a second drive unit and a third drive unit, and the plurality of rear grids are driven to rotate by the third drive unit and have a speed difference with each other, and the rotation direction of the front grid is opposite to that of the rear grid.

[0013] Further, the second drive unit includes a second motor, the grid assembly includes a plurality of second driving gears, the plurality of second driving gears are driven to rotate synchronously by a second output shaft of the second motor, the front grid is provided with a second driven gear, and the plurality of second driving gears are respectively meshed with the second driven gears of the plurality of front grids and have different transmission ratios.

[0014] From the above, the plurality of front grids are driven by the same drive unit and have different rotation angles due to the speed difference, reaching different target positions. Similarly, the plurality of rear grids are driven by the same drive unit and have different rotation angles due to the speed difference, reaching different target positions. In this way, within the same preset period, the plurality of front grids and the plurality of rear grids move to the target positions along the respective rotation directions at the respective corresponding speeds, so that all the rotating grids change from being overlapped with each other to being staggered with each other, thereby meeting the movement requirements of the grid assembly in the open state and the closed state with fewer drive units, reducing the cost investment. Preferably, the same output shaft is used to mesh the gear sets with different transmission ratios to make the rotating grids have different speeds, the driven gears can be integrally formed with the rotating grids, having the advantage of easy production, and the gear transmission has the advantage of high precision.

[0015] Further, the second driving gear is arranged on a second rotating shaft at a circumferential position of the grid assembly, the rotating grid through which the second rotating shaft passes is provided with a second avoiding hole, the second avoiding hole penetrates in the axial direction and extends in the circumferential direction, and the second rotating shaft passes through the second avoiding hole; the third driving gear is arranged on a third rotating shaft at a circumferential position of the grid assembly, the rotating grid through which the third rotating shaft passes is provided with a third avoiding hole, the third avoiding hole penetrates in the axial direction and extends in the circumferential direction, and the third rotating shaft passes through the third avoiding hole.

[0016] As can be seen from the above, in addition, when the number of rotating grids is one, the driving motor of the rotating grid can be arranged at the shaft center; but if two or more rotating grids are arranged, since driving motors need to be arranged respectively, multiple motors cannot jointly occupy the shaft center, and the transmission of the rotating grid is also difficult to achieve. By arranging the avoiding hole, the output shaft of the motor can pass through the rotating grid that originally blocks the way in the circumferential position of the grid center disc along the axial direction to reach the cooperating rotating grid, and only needs to arrange the grid hole as an arc line to solve the problem of the rotating grid that blocks the output shaft from passing through, thereby ensuring the normal work of each rotating grid. Mainly, this arrangement does not need to add a large amount of transmission structure to avoid the rotating grid, has the advantages of reducing design difficulty, ensuring transmission accuracy, and avoiding affecting air supply.

[0017] In addition, further solutions are that the middle grid can rotate relative to the base grid; the grid assembly can be changed to a third state, when the grid assembly is in the third state, the plurality of front grids and the plurality of rear grids are stacked in the axial direction, and in the axial projection, along the circumferential direction, one of the two adjacent base radial strips, the rotating radial strip of the front grid, the middle radial strip, the middle grid, and the other of the two adjacent base radial strips are sequentially arranged at intervals.

[0018] As can be seen from the above, in the axial projection, in the open state, the width of the air exhaust channel between adjacent grids is large to ensure the air volume, however, in actual use, for example, the outdoor unit is installed in a position accessible to children on the balcony, at this time, the safety of children needs to be considered. The third state mainly ensures that the width of the air exhaust channel formed between any two radial strips in the circumferential direction is less than the size of the child safety test.

[0019] Further solutions are that the base grid is rotatably arranged; the grid assembly includes a first driving unit, the middle grid and the base grid are driven to rotate by the first driving unit and have a speed difference.

[0020] Further solutions are that the first driving unit includes a first motor, the grid assembly includes a first driving gear and a fourth driving gear, the first driving gear and the fourth driving gear are coaxially rotated by the first motor; the base grid is provided with a first driven gear, the first driving gear is engaged with the first driven gear; the middle grid is provided with a fourth driven gear, the fourth driving gear is engaged with the fourth driven gear; the transmission ratio of the first driving gear and the first driven gear is different from the transmission ratio of the fourth driving gear and the fourth driven gear.

[0021] From the above, in fact, in the open state of the plurality of rotating grids superimposed, only the middle grid and the base grid need to be rotated to change to the third state considering the child safety, that is, the rotating actions of the base grid and the middle grid are only used in the process of changing from the open state to the installed state, therefore, the base grid and the middle grid are driven by the same driving unit to reduce the investment of the driving unit and reduce the complexity of the control program. The preferred scheme is that the rotating grids obtain different rotating speeds through the engagement of gear sets with different transmission ratios through the same output shaft, the driven gears can be integrally formed with the rotating grids and have the advantages of easy production, and the gear transmission has the advantage of high precision.

[0022] The further scheme is that the first rotating shaft where the first driving gear is arranged is arranged at the circumferential position of the grid assembly, all the rotating grids are provided with first avoiding holes, the first avoiding holes are penetrated along the axial direction and extend along the circumferential direction, and the first rotating shaft passes through the first avoiding holes of all the rotating grids.

[0023] From the above, through the arrangement of the avoiding holes, the output shaft of the motor can pass through the originally hindered rotating grids at the circumferential position of the grid center disc along the axial direction to reach the matched rotating grid, and only needs to arrange the grid holes to extend in the arc line to solve the problem that the output shaft hinders the rotation of the rotating grid passing through, and ensure the normal work of the rotating grids. Mainly, this arrangement does not need to add a large number of transmission structures to avoid the rotating grids, has the advantages of reducing the design difficulty, ensuring the transmission precision and avoiding the influence on the air supply.

[0024] The air conditioner provided in the second purpose of the utility model comprises the above grid assembly. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A schematic view of a rib strip in an open state of a prior art grid assembly;

[0026] Figure 2 A schematic view of a rib strip in a closed state of a prior art grid assembly;

[0027] Figure 3 A schematic view of a rib strip in an open state of a prior art grid assembly after adding one rotating grid;

[0028] Figure 4 A schematic view of a rib strip in a closed state of a prior art grid assembly after adding one rotating grid;

[0029] Figure 5 A structure view of the grid assembly embodiment of the utility model in an open state.

[0030] Figure 6 A sectional view of the grid assembly embodiment of the utility model in an open state.

[0031] Figure 7 It is the structural view of the foundation grating in the grid assembly embodiment of the utility model.

[0032] Figure 8 It is the structural view of the first rotating grating in the grid assembly embodiment of the utility model.

[0033] Figure 9 It is the partial structural view of the first rotating grating in the grid assembly embodiment of the utility model.

[0034] Figure 10 It is the partial structural view of the second rotating grating in the grid assembly embodiment of the utility model.

[0035] Figure 11 It is the sectional view of the second motor, the first rotating grating and the second rotating grating in the grid assembly embodiment of the utility model.

[0036] Figure 12 It is the sectional view of the third motor, the fourth rotating grating and the fifth rotating grating in the grid assembly embodiment of the utility model.

[0037] Figure 13 It is the sectional view of the first motor, the foundation grating and the third rotating grating in the grid assembly embodiment of the utility model.

[0038] Figure 14 It is the structural view of the closed state of the grid assembly embodiment of the utility model.

[0039] Figure 15 It is the sectional view of the closed state of the grid assembly embodiment of the utility model.

[0040] Figure 16 It is Figure 6 The enlarged view of A in the figure.

[0041] Figure 17 It is Figure 15 The enlarged view of B in the figure.

[0042] Figure 18 It is the strip diagrammatic view of the grid assembly embodiment of the utility model from the open state to the closed state.

[0043] Figure 19 It is the strip diagrammatic view of the grid assembly embodiment of the utility model from the open state to the third state. DETAILED DESCRIPTION

[0044] Grid assembly embodiment and air conditioner embodiment

[0045] See Figure 5 And Figure 6The air conditioner of the embodiment comprises an outdoor unit, the outdoor unit comprises a machine body and a grid assembly installed at an air outlet of the machine body, the grid assembly comprises a base grid 1, a rotating grid set 2, a first motor 81, a second motor 82 and a third motor 83, and further comprises a transmission gear set arranged between the motors and the grids.

[0046] The base grid 1, the first rotating grid 21, the second rotating grid 22, the third rotating grid 23, the fourth rotating grid 24 and the fifth rotating grid 25 are sequentially stacked along the axial direction of the grid assembly, the base grid 1 is rotatably arranged around the center of the grid assembly, and the first rotating grid 21, the second rotating grid 22, the third rotating grid 23, the fourth rotating grid 24 and the fifth rotating grid 25 are rotatably arranged around the center of the grid assembly relative to the base grid 1.

[0047] The plurality of rotating grids comprises a median grid in the middle of the sequence, in the embodiment, the median grid is the third rotating grid 23 which is the third in the sequence, and the rotating radial rib of the median grid is a median radial rib. The plurality of rotating grids comprises a front grid arranged between the base grid 1 and the median grid, that is, the first rotating grid 21 and the second rotating grid 22 are front grids; and the plurality of rotating grids comprises a rear grid away from the base grid 1 than the median grid, that is, the fourth rotating grid 24 and the fifth rotating grid 25 are rear grids.

[0048] The rotating radial rib of the first rotating grid 21 is a first rib 213, the rotating radial rib of the second rotating grid 22 is a second rib 223, the rotating radial rib of the third rotating grid 23 is a third rib 233, the rotating radial rib of the fourth rotating grid 24 is a fourth rib 243, and the rotating radial rib of the fifth rotating grid 25 is a fifth rib 253. It should be noted that in the embodiment, the base radial rib 1 and the rotating radial ribs of the rotating grids all extend along an arc, and are called “radial” ribs due to the radial extension distance of the ribs, rather than limiting the extension direction of the ribs to “radial”.

[0049] Referring to Figures 5 to 7The base grid 1 comprises a base center disc 11 at the center, a base outer frame 12 at the outermost periphery, a plurality of base radial ribs 13 arranged uniformly along the periphery of the base grid 1 and arranged in the axial direction, and a plurality of circumferential ribs 14 arranged in the radial direction of the base grid 1. The base grid 1 is integrally formed, the first driven gear 18 is formed on the base center disc 11 at the center, and in addition, the base center disc 11 is provided with a first positioning hole 19 at the periphery of the first driven gear 18.

[0050] Referring to Figure 6 and Figure 16 As shown, the plurality of base radial ribs 13 on the base grid 1 are higher in height than the base surface of the base grid 1 in the axial direction, and the base radial ribs 13 extend in the axial direction (z-axis direction) and pass through all the rotating grids including the first rotating grid 21, the second rotating grid 22, the third rotating grid 23, the fourth rotating grid 24 and the fifth rotating grid 25, so that the base radial ribs 13 can be opposite to the first rib 213, the second rib 223, the third rib 233, the fourth rib 243 and the fifth rib 253 in the circumferential direction.

[0051] In combination with Figure 8 The structure of the rotating grid is illustrated by taking the first rotating grid 21 as an example. The first rotating grid 21 comprises a first center disc 211, a first outer frame 212 and a plurality of first ribs 213 arranged uniformly along the periphery of the first rotating grid 21 and arranged between the first center disc 211 and the first outer frame 212. The first rotating grid 21 is integrally formed, the first rotating driven gear 218 is formed at the center of the first center disc 211, the first rotating driven gear 218 is the second driven gear of the utility model, and the first center disc 211 is provided with three evenly distributed relief holes 217 at the periphery, the relief holes 217 pass through the axial direction of the grid assembly and extend in the circumferential direction, wherein, according to the different rotating shafts passing through the relief holes 217, the three relief holes 217 are respectively used as the first relief hole, the second relief hole and the third relief hole of the utility model, specifically, one of the relief holes 217 is used as the first relief hole for the first rotating shaft, one of the relief holes 217 is used as the second relief hole for the second rotating shaft, and one of the relief holes 217 is used as the third relief hole for the third rotating shaft. In addition, the first center disc 211 is provided with a second positioning hole 219 at the periphery of the first rotating driven gear 218. The angle through by the relief hole 217 in the circumferential direction is 12 degrees, and the angle through is the angle between the centers of the two arc surfaces extending at both ends of the relief hole 217.

[0052] By comparison Figure 9 and Figure 10The number of teeth of the first rotation driven gear 218 of the first rotation grid 21 is less than the number of teeth of the second rotation driven gear 228 of the second rotation grid 22.

[0053] Referring to Figure 11 The first rotation grid 21 and the second rotation grid 22, as the front grids, are driven to rotate by the second motor 82 and have a rotational speed difference. Further, the transmission gear set includes two second driving gears, i.e., the first rotation driving gear 821 and the second rotation driving gear 822, for driving the front grids. The first rotation driving gear 821 and the second rotation driving gear 822 are installed on or integrated with the second rotation shaft 820, and the second rotation shaft 820 is driven to rotate by the second motor 82, so that the first rotation driving gear 821 and the second rotation driving gear 822 can be coaxially rotated under the driving of the second motor 82. The transmission gear set further includes the first rotation driven gear 218 on the first rotation grid 21 and the second rotation driven gear 228 on the second rotation grid 22. The first rotation driving gear 821 and the second rotation driving gear 822 are arranged at the circumferential position of the grid assembly, the second rotation shaft 820 passes through the second avoiding holes of the first rotation grid 21 and the second rotation grid 22, the first rotation driving gear 821 is engaged with the first rotation driven gear 218, and the second rotation driving gear 822 is engaged with the second rotation driven gear 228. The transmission ratio of the first rotation driving gear 821 and the first rotation driven gear 218 is different from the transmission ratio of the second rotation driving gear 822 and the first rotation driven gear 218, so that the rotation speeds of the first rotation grid 21 and the second rotation grid 22 are different, and the angles of rotation of the first rotation grid 21 and the second rotation grid 22 are different within the same time length. Specifically, the rotation angle of the first rotation grid 21 is twice the rotation angle of the second rotation grid 22 within the same time length.

[0054] Referring to Figure 12The fourth rotating grid 24 and the fifth rotating grid 25, as the rear grids, are driven to rotate by the third motor 83 and have different rotating speeds. Further, the transmission gear set includes two third driving gears for driving the rear grids, i.e., the fourth rotating driving gear 831 and the fifth rotating driving gear 832, which are installed on or integrated with the third rotating shaft 830 driven to rotate by the third motor 83, so that the fourth rotating driving gear 831 and the fifth rotating driving gear 832 can rotate coaxially under the driving of the third motor 83. The transmission gear set further includes the fourth rotating driven gear 248 on the fourth rotating grid 24 and the fifth rotating driven gear 258 on the fifth rotating grid 25. The fourth rotating driving gear 831 and the fifth rotating driving gear 832 are arranged at the circumferential position of the grid assembly, the third rotating shaft 830 passes through the third avoiding hole of the fourth rotating grid 24 and the fifth rotating grid 25, the fourth rotating driving gear 831 is engaged with the fourth rotating driven gear 248, and the fifth rotating driving gear 832 is engaged with the fifth rotating driven gear 258. The transmission ratio of the fourth rotating driving gear 831 and the fourth rotating driven gear 248 and the transmission ratio of the fifth rotating driving gear 832 and the fifth rotating driven gear 258 are different, so that the rotating speeds of the fourth rotating grid 24 and the fifth rotating grid 25 are different, and the angles of rotation of the fourth rotating grid 24 and the fifth rotating grid 25 are different in the same time length. Specifically, the angle of rotation of the fifth rotating grid 25 is twice the angle of rotation of the fourth rotating grid 24 in the same time length. In addition, the driving direction of the second motor 82 is opposite to that of the third motor 83, so that when the second motor 82 and the third motor 83 work together, the first rotating grid 21 and the second rotating grid 22 rotate forward, and the fourth rotating grid 24 and the fifth rotating grid 25 rotate reversely, i.e., the rotating direction of the front grid is opposite to that of the rear grid.

[0055] Referring to Figure 13The third rotating grid 23 as the median grid is driven to rotate by the first motor 81 and has a rotational speed difference with the base grid 1. The transmission gear set further comprises a first driving gear 811 and a fourth driving gear 812, both of which are mounted on or integrated with the first rotating shaft 810 driven to rotate by the first motor 81. The first driving gear 811 is engaged with the first driven gear 18 of the base grid 1, and the third rotating grid 23 is provided with a fourth driven gear 238, and the fourth driving gear 812 is engaged with the fourth driven gear 238, so that the third rotating grid 23 and the base grid 1 can be coaxially rotated under the driving of the first motor 81. The transmission ratio of the first driving gear 811 to the first driven gear 18 and the transmission ratio of the fourth driving gear 812 to the fourth driven gear 238 are different, and in the same time length, the angle turned by the third rotating grid 23 is twice the angle turned by the base grid 1.

[0056] Referring to Figure 5 , Figure 6 and Figure 16 , when the grid assembly is in the open state, the rotating radial ribs of the plurality of rotating grids are axially superimposed into a superimposed body 203, and the superimposed body 203 is located at the middle position of the adjacent two base ribs 13.

[0057] Referring to Figure 14 , Figure 15 and Figure 17 , when the grid assembly is in the closed state, the rotating radial ribs of the plurality of rotating grids are misaligned, and among them, the first rib 213 of the first rotating grid 21 is adjacent to one of the two adjacent base radial ribs 13, and the fifth rib 253 of the fifth rotating grid 25 is adjacent to the other of the two adjacent base radial ribs 13. The base radial rib 13 extends along the axial direction to a sufficient height to ensure the space separation effect in the circumferential direction. In the closed state, the misaligned plurality of rotating radial ribs are respectively adjacent to the two base radial ribs at the head and tail, so that the exhaust air passage is no longer communicated between the inside and outside of the grid in the inclined direction, and the sealing effect is ensured.

[0058] Referring to Figures 16 to 18 , when the grid assembly is in the open state, the exhaust air passage formed occupies about two-thirds of the area of the grid assembly, and the air supply amount is improved. When the grid assembly is in the open state or in the closed state, the median radial rib, i.e., the third rib 233, is located at the middle position of the two adjacent base radial ribs 13 in the circumferential direction. It can be seen that during the change of the grid assembly between the open state and the closed state, the median grid and the base grid 1 do not need to be moved, and only the forward rotation of the first rotating grid 21 and the second rotating grid 22 and the reverse rotation of the fourth rotating grid 24 and the fifth rotating grid 25 are required to meet the action requirements.

[0059] Referring toFigure 19 When the grille assembly is in the third state, the rotating radial ribs of the plurality of front grilles and the plurality of rear grilles are axially superimposed into a second superimposition body 203', i.e., the first rotating grille 21, the second rotating grille 22, the fourth rotating grille 24 and the fifth rotating grille 25 are axially superimposed. In the axial projection, one of the two adjacent basic radial ribs 13, the second superimposition body 203', the third rib 233 and the other of the two adjacent basic radial ribs are sequentially arranged at intervals. In the case of changing from the open state to the third state, only the third rotating grille 23 as the middle grille and the basic grille 1 need to be rotated to complete the action. In the process, the basic radial rib 13 rotates through an angle x, and the third rib 233 of the third rotating grille 23 rotates through an angle 2x, so that the angle between any two of the first basic radial rib 13, the second superimposition body 203', the third rib 233 and the second basic radial rib 13 is x. The angle of the air outlet channel in the open state is set to 2x, and the angle of the air outlet channel formed between any adjacent ribs in the third state is only x, i.e., half of the original. In actual use, for example, the outdoor unit is installed in a position accessible to children on the balcony of one's own home, at which time the safety of children needs to be considered. The third state mainly ensures that the width of the air outlet channel formed between any ribs in the circumferential direction is less than the size of the child safety test.

[0060] In other embodiments, if the third state is not needed, the basic grille and the middle grille can be fixedly different.

[0061] In other embodiments, the number of rotating grilles is four. In this setting, in the open state, the distance between the superimposition body and the two adjacent basic ribs is not equal.

[0062] Finally, it should be emphasized that the above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A grille assembly comprising a base grille, the base grille comprising base radial ribs arranged along a circumference of the base grille; characterized in that: the grille assembly further comprises a rotating grille set, the rotating grille set comprising at least four rotating grilles, each of the rotating grilles comprising rotating radial ribs arranged along a circumference of the rotating grille, the base grille and the rotating grilles being arranged concentrically and sequentially along an axial direction, any two of the rotating grilles being rotatable relative to each other, at least a portion of the rotating grilles being rotatable relative to the base grille; the base radial ribs extend along the axial direction and pass through all of the rotating grilles; when the grille assembly is in an open state, the rotating radial ribs of the rotating grilles are stacked along the axial direction; when the grille assembly is in a closed state, the rotating radial ribs of the rotating grilles are misaligned, and the rotating radial ribs of one of the rotating grilles abut one of the base radial ribs, and the rotating radial ribs of another of the rotating grilles abut the other of the base radial ribs. 2.The grille assembly of claim 1, characterized in that: the rotating grille set comprises at least five of the rotating grilles, and the number of the rotating grilles is odd; the rotating grilles comprise a middle grille in a middle position in an order, the rotating grilles comprise front grilles arranged between the base grille and the middle grille, and the rotating grilles comprise rear grilles farther from the base grille than the middle grille; the rotating radial ribs of the middle grille are middle radial ribs, and when the grille assembly is in the open state or in the closed state, the middle radial ribs are located in a middle position between the adjacent base radial ribs in the circumferential direction. 3.The grille assembly of claim 2, characterized in that: each of the front grilles and the rear grilles is rotatable relative to the base grille; the grille assembly comprises a second driving unit and a third driving unit, each of the front grilles is driven to rotate by the second driving unit and has a rotational speed difference from each other, each of the rear grilles is driven to rotate by the third driving unit and has a rotational speed difference from each other, and a rotating direction of the front grilles is opposite to a rotating direction of the rear grilles. 4.The grille assembly of claim 3, characterized in that: the second driving unit comprises a second motor, the grille assembly comprises a plurality of second driving gears, each of the second driving gears is coaxially driven to rotate by the second motor, each of the front grilles is provided with a second driven gear, each of the second driving gears is engaged with the second driven gear of each of the front grilles, and transmission ratios of the second driving gears and the second driven gears are different. The third driving unit comprises a third motor, the grille assembly comprises a plurality of third driving gears, each of the plurality of third driving gears is coaxially rotated by the third motor, the front grille is provided with a third driven gear, each of the plurality of third driving gears is engaged with the third driven gear of the front grille, and the transmission ratios of the plurality of third driving gears and the third driven gear are different.

5. The grille assembly according to claim 4, wherein: the second driving shaft, on which the second driving gear is arranged, is arranged at a circumferential position of the grille assembly, the rotating grille, through which the second driving shaft passes, is provided with a second avoiding hole, the second avoiding hole is penetrated along the axial direction and extends along the circumferential direction, and the second driving shaft passes through the second avoiding hole; the third driving shaft, on which the second driving gear is arranged, is arranged at a circumferential position of the grille assembly, the rotating grille, through which the third driving shaft passes, is provided with a third avoiding hole, the third avoiding hole is penetrated along the axial direction and extends along the circumferential direction, and the third driving shaft passes through the third avoiding hole.

6. The grille assembly according to any one of claims 2 to 5, wherein: the middle grille is rotatable relative to the base grille; the grille assembly can be changed to a third state, when the grille assembly is in the third state, the plurality of front grilles and the plurality of rear grilles are stacked along the axial direction, and in the projection along the axial direction, one of the base radial strips, the rotating radial strip of the front grille, the middle radial strip and the other of the base radial strips are arranged in sequence and spaced apart along the circumferential direction.

7. The grille assembly according to claim 6, wherein: the base grille is rotatable; the grille assembly comprises a first driving unit, the middle grille and the base grille are driven to rotate by the first driving unit and have a rotational speed difference.

8. The grille assembly according to claim 7, wherein: the first driving unit comprises a first motor, the grille assembly comprises a first driving gear and a fourth driving gear, and the first driving gear and the fourth driving gear are coaxially rotated by the first motor; the base grille is provided with a first driven gear, the first driving gear is engaged with the first driven gear; the middle grille is provided with a fourth driven gear, the fourth driving gear is engaged with the fourth driven gear; the transmission ratio of the first driving gear and the first driven gear is different from the transmission ratio of the fourth driving gear and the fourth driven gear.

9. The grille assembly according to claim 8, wherein: the first driving shaft, on which the first driving gear is arranged, is arranged at a circumferential position of the grille assembly, all the rotating grilles are provided with first avoiding holes, the first avoiding holes are penetrated along the axial direction and extend along the circumferential direction, and the first driving shaft passes through the first avoiding holes of all the rotating grilles.

10. An air conditioner characterized by The grille assembly according to any one of claims 1 to 9.

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