Rack in gear-and-rack meshing structure, tooth profile design method therefor, and air conditioner

Abstract

The present application relates to the technical field of air conditioning, and discloses a rack in a gear-and-rack meshing structure. The rack moves sequentially along a first linear trajectory and a second linear trajectory, and is provided with a first linear tooth segment and a second linear tooth segment to correspond to the first linear trajectory and the second linear trajectory, respectively. The rack is further provided with a transition tooth segment, and a tooth profile of the transition tooth segment is determined by ∠AOC, where A is the point of tangency between the first linear trajectory and the pitch circle of the gear, C is the point of tangency between the second linear trajectory and the pitch circle of the gear, and O is the center of rotation of the gear.

Description

Rack and tooth profile design method in gear rack meshing structure, air conditioner

[0001] This application is based on the Chinese patent application with application number 202410046327.6 and application date of January 12, 2024, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0002] The present application relates to the technical field of air conditioning, and in particular to a rack in a gear-rack meshing structure, a tooth profile design method thereof, and an air conditioner. Background Art

[0003] Currently, when the air guide plate of an air conditioner swings, the center of rotation is fixed, and a variety of air guide functions cannot be realized, and the use needs of users cannot be met.

[0004] In the related art, the air guide plate is driven by a gear rack structure, and the rack moves along the first straight track and the second straight track successively to increase the number of air guide positions of the air guide plate, so that the air guide plate has a variety of air guide functions, thereby meeting the user's usage needs.

[0005] However, how to design a rack that can move along the first straight track and the second straight track successively is a problem that needs to be solved urgently.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field.

[0007] Summary of the Invention

[0008] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not intended to be an extensive review, nor to identify key / critical elements or to delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0009] The embodiments of the present disclosure provide a rack in a gear-rack meshing structure, a tooth profile design method thereof, and an air conditioner, so as to realize the tooth profile design of the rack.

[0010] According to a first aspect of an embodiment of the present invention, a rack in a gear-rack meshing structure is provided, wherein the rack moves successively along a first straight line trajectory and a second straight line trajectory, and the rack is provided with a first straight gear tooth segment and a second straight gear tooth segment to correspond to the first straight line trajectory and the second straight line trajectory, respectively. The rack is also provided with a transition gear tooth segment, and the tooth profile of the transition gear tooth segment is determined by ∠AOC, wherein the tangent point of the first straight line trajectory and the gear pitch circle is A, the tangent point of the second straight line trajectory and the gear pitch circle is C, and the rotation center of the gear is O.

[0011] According to a second aspect of an embodiment of the present invention, an air conditioner is provided, comprising: an indoor unit, comprising a shell and an air guide plate, the shell defining an air outlet duct and being provided with an air outlet connected to the air duct, the air guide plate being movably arranged at the air outlet; a rack in a gear rack meshing structure as described in any one of the above embodiments is adopted, and the rack is drive-connected to the air guide plate.

[0012] According to a third aspect of an embodiment of the present invention, a method for designing the tooth profile of a rack in a gear-rack meshing structure is provided, which is used to construct the outer shape design of the rack described in any one of the above embodiments.

[0013] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0015] FIG1 is a schematic structural diagram of an indoor unit provided by an embodiment of the present disclosure from one perspective, wherein the first air guide plate and the second air guide plate are both in the closed position;

[0016] FIG2 is a structural diagram of the indoor unit in FIG1 from another perspective;

[0017] FIG3 is an exploded schematic diagram of the driving device of the indoor unit in FIG1 ;

[0018] FIG4 is a schematic structural diagram of a second side wall of the indoor unit in FIG1 ;

[0019] FIG5 is a schematic structural diagram of the first connecting rod and the connecting rod of the indoor unit in FIG1 ;

[0020] FIG6 is a schematic structural diagram of a first side wall of the indoor unit in FIG1 ;

[0021] FIG7 is a schematic structural diagram of the second connecting rod of the indoor unit in FIG1 ;

[0022] FIG8 is a schematic diagram of a partial structure of the indoor unit in FIG1 ;

[0023] FIG9 is a schematic cross-sectional view of the structure taken along line AA in FIG8 ;

[0024] FIG10 is a schematic cross-sectional view taken along line BB in FIG8 ;

[0025] FIG11 is a structural diagram of another indoor unit provided by an embodiment of the present disclosure, wherein the first air guide plate is in a horizontal blowing cooling air supply position, and the second air guide plate is in a closed position;

[0026] FIG12 is an enlarged structural diagram of portion A in FIG11;

[0027] FIG13 is a schematic diagram of a partial structure of the indoor unit in FIG11;

[0028] FIG14 is a schematic structural diagram of the driving device of the indoor unit in FIG11;

[0029] FIG15 is a schematic cross-sectional view taken along CC in FIG14 ;

[0030] FIG16 is a schematic cross-sectional view of the structure taken along the DD line in FIG14 ;

[0031] FIG17 is a structural diagram of another indoor unit provided by an embodiment of the present disclosure, wherein the first air guide plate is in a lossless maximum air supply position, and the second air guide plate is in a closed position;

[0032] FIG18 is a schematic diagram of a partial structure of the indoor unit in FIG17;

[0033] FIG19 is a schematic cross-sectional view taken along line EE in FIG18 ;

[0034] FIG20 is a schematic cross-sectional view of the structure taken along the FF direction in FIG18 ;

[0035] FIG21 is a schematic structural diagram of another indoor unit provided by an embodiment of the present disclosure, wherein the first air guide plate is in a downward blowing hot air supply position, and the second air guide plate is in a closed position;

[0036] FIG22 is a schematic diagram of a partial structure of the indoor unit in FIG21;

[0037] FIG23 is a schematic cross-sectional view taken along line GG in FIG22 ;

[0038] FIG24 is a schematic cross-sectional view taken along the HH line in FIG22 ;

[0039] FIG25 is a schematic diagram of a partial structure of another indoor unit provided by an embodiment of the present disclosure, wherein the first air guide plate and the second air guide plate are both in the closed position;

[0040] FIG26 is a schematic structural diagram of the driving device of the indoor unit in FIG25;

[0041] FIG27 is a schematic cross-sectional view of the structure taken along line II in FIG26;

[0042] FIG28 is a schematic cross-sectional view taken along line JJ in FIG26 ;

[0043] FIG29 is a schematic cross-sectional view of the structure taken along line KK in FIG26 ;

[0044] FIG30 is a schematic diagram of an exploded structure of the driving device of the indoor unit in FIG25;

[0045] FIG31 is a schematic structural diagram of the third side wall of the indoor unit in FIG25 from one perspective;

[0046] FIG32 is a schematic structural diagram of the third side wall in FIG31 from another perspective;

[0047] FIG33 is a schematic structural diagram of the third connecting rod of the indoor unit in FIG25;

[0048] FIG34 is a schematic structural diagram of a first side wall of the indoor unit in FIG25 from one perspective;

[0049] FIG35 is a schematic structural diagram of the first side wall in FIG34 from another perspective;

[0050] FIG36 is a schematic diagram of a partial structure of another indoor unit provided by an embodiment of the present disclosure, wherein the first air guide plate is in a downward blowing heating air supply position, and the second air guide plate is in an open position;

[0051] FIG37 is a cross-sectional view of a portion of the indoor unit in FIG36 taken in one direction;

[0052] FIG38 is a cross-sectional view of a part of the indoor unit in FIG36 from another direction;

[0053] FIG39 is a cross-sectional view of a portion of the indoor unit in FIG36 taken from another direction;

[0054] FIG40 is a schematic diagram of a partial structure of another indoor unit provided by an embodiment of the present disclosure, wherein the first air guide plate is in a closed position and the second air guide plate is in an open position;

[0055] FIG41 is a schematic diagram of a partial structure of another indoor unit provided by an embodiment of the present disclosure, wherein the first air guide plate is in a horizontal blowing cooling air supply position, and the second air guide plate is in an open position;

[0056] FIG42 is a schematic diagram of a partial structure of another indoor unit provided by an embodiment of the present disclosure, wherein the first air guide plate is in a lossless maximum air supply position and the second air guide plate is in a closed position;

[0057] FIG43 is a flow chart of a design method provided by an embodiment of the present disclosure;

[0058] FIG44 is a schematic diagram of a structure in which a gear and a rack are meshed, provided by an embodiment of the present disclosure;

[0059] FIG45 is a schematic diagram of another structure of meshing gears and racks provided by an embodiment of the present disclosure;

[0060] FIG46 is a schematic diagram of a structure of meshing of another gear and rack provided by an embodiment of the present disclosure;

[0061] FIG47 is a schematic diagram of a structure of meshing of another gear and rack provided by an embodiment of the present disclosure;

[0062] FIG48 is a flow chart of another design method provided by an embodiment of the present disclosure;

[0063] FIG49 is a schematic structural diagram of another indoor unit provided in an embodiment of the present disclosure;

[0064] FIG50 is a schematic diagram of a partial structure of another indoor unit provided in an embodiment of the present disclosure;

[0065] FIG51 is a schematic diagram of a partial structure of another indoor unit provided by an embodiment of the present disclosure;

[0066] FIG52 is a schematic diagram of a partial structure of another indoor unit provided by an embodiment of the present disclosure;

[0067] FIG53 is a schematic structural diagram of another indoor unit provided in an embodiment of the present disclosure.

[0068] Reference numerals:

[0069] 100, indoor unit; 101, first air guide plate; 102, connecting protrusion; 103, extending protrusion; 104, second air guide plate; 105, first air outlet; 106, second air outlet; 107, air duct; 300, driving device; 301, first connecting rod; 302, first gear segment; 303, third gear segment; 304, fifth gear segment; 306, first guide portion; 307, first sub-guide portion; 308, second sub-guide portion; 309, first guide protrusion; 310, first sub-guide protrusion; 311, second sub-guide protrusion; 312, connecting rod; 313, second connecting rod; 314, second gear segment 315, fourth gear tooth segment; 316, sixth gear tooth segment; 317, second guide portion; 318, third sub-guide portion; 319, fourth sub-guide portion; 320, second guide protrusion; 321, third sub-guide protrusion; 322, fourth sub-guide protrusion; 323, third connecting rod; 324, seventh gear tooth segment; 325, eighth gear tooth segment; 326, ninth gear tooth segment; 327, arc gear tooth segment; 328, first limiting structure; 329, first limiting protrusion; 330, second limiting structure; 331, second limiting protrusion; 5, box body; 50, first side wall; 502, first guide matching portion; 503, first 504, second sub-guide matching portion; 505, guide groove; 506, first guide groove; 507, first sub-guide groove; 508, second sub-guide groove; 509, first straight segment; 510, third straight segment; 511, fifth straight segment; 512, first position-limiting matching structure; 513, first position-limiting groove; 515, second side wall; 516, second guide matching portion; 517, third sub-guide matching portion; 518, fourth sub-guide matching portion; 520, third sub-guide groove; 521, fourth sub-guide groove; 522, second straight segment; 523, fourth straight segment; 524, sixth straight segment; 5 25. Third side wall; 526. Second limiting matching structure; 527. Second limiting groove; 528. First sub-straight segment; 529. Second sub-straight segment; 530. Third sub-straight segment; 531. Arc segment; 60. First driving structure; 600. Driving assembly; 601. First motor; 602. First gear; 603. Second gear; 604. Second driving structure; 605. Second motor; 606. Third gear; 701. Gear; 702. Rack; 703. Arc tooth profile; 704. Straight tooth profile; 705. First linear gear tooth segment; 706. Second linear gear tooth segment; 707. Transition gear tooth segment. DETAILED DESCRIPTION

[0070] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0071] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0072] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0073] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0074] Unless otherwise stated, the term "plurality" means two or more.

[0075] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0076] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0077] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0078] In combination with Figures 1-42, an embodiment of the present disclosure provides a driving device 300 for an air guide plate of an air conditioner. The air conditioner includes an air guide plate, and the air guide plate includes a first air guide plate 101. The driving device 300 includes a first connecting rod 301 and a second connecting rod 313. The first connecting rod 301 and the second connecting rod 313 are both suitable for connecting with the first air guide plate 101.

[0079] During the opening process of the first air deflector 101, the motion trajectories of the first connecting rod and the second connecting rod each include linear motion trajectories in different directions. For example, the first connecting rod or the second connecting rod first performs a linear motion in a first direction, then performs a circular motion, and then performs a linear motion in a second direction, wherein the first direction and the second direction are neither overlapping nor parallel.

[0080] Optionally, the first connecting rod 301 and the second connecting rod 313 both perform zigzag motion. In other words, during the opening process of the first air guide plate 101, the first connecting rod 301 performs linear motion in different directions, and the second connecting rod 313 also performs linear motion in different directions.

[0081] The broken line movement mode, on the one hand, can realize a large change in the movement direction of the first connecting rod 301 and the second connecting rod 313, thereby greatly changing the movement position of the first air guide plate 101, so that the first air guide plate 101 can realize a variety of wind guiding modes; on the other hand, it can reduce the movement stroke of the first connecting rod 301 and the second connecting rod 313 in the up and down directions, and reduce the space occupied by the driving device 300 in the up and down directions.

[0082] As shown in Figure 3, the driving device 300 also includes a connecting rod 312, the first connecting rod 301 is connected to the first air guide plate 101 through the connecting rod 312, and the first connecting rod 301 is rotatably connected to one end of the connecting rod 312, and the other end of the connecting rod 312 is rotatably connected to the first air guide plate 101; the second connecting rod 313 is rotatably connected to the first air guide plate 101.

[0083] The first connecting rod 301 is rotatably connected to the first air deflector 101 via the connecting rod 312, and the second connecting rod 313 is directly rotatably connected to the first air deflector 101. Therefore, the first connecting rod 301 and the second connecting rod 313 have different driving capabilities for the first air deflector 101 when the first and second connecting rods 301 and 313 have the same motion trajectory. This arrangement allows the first air deflector 101 to be positioned differently by coordinating the different motion trajectories of the first and second connecting rods 301 and 313.

[0084] Optionally, as shown in Figures 4, 6, 9 and 10, during the opening process of the first air guide plate 101, the first connecting rod 301 moves along the first straight segment 509, and the second connecting rod 313 moves along the second straight segment 522; wherein, during the opening process of the first air guide plate 101, along the extension direction of the first connecting rod 301, that is, along the direction from back to front, the first straight segment 509 and the second straight segment 522 are both tilted downward, so that the first connecting rod 301 and the second connecting rod 313 both move downward.

[0085] The inclination of the first straight segment 509 is smaller than that of the second straight segment 522. Thus, during the opening process of the first air guide plate 101, the movement direction of the second connecting rod 313 is more downward compared to the first connecting rod 301. Since the second connecting rod 313 is directly connected to the first air guide plate 101 for rotation, the second connecting rod 313 is more capable of driving the first air guide plate 101 to move significantly. Therefore, the inclination of the first straight segment 509 is set to be smaller than that of the second straight segment 522, so that the second connecting rod 313 can significantly drive the first air guide plate 101 to flip downward, and cooperate with the movement of the connecting rod 312 and the first connecting rod 301 to enable the first air guide plate 101 to reach the position of flat-blowing cooling air supply. The air guide surface of the first air guide plate 101 is defined as the first air guide surface 108, which faces upward to achieve a flat-blowing cooling air supply mode.

[0086] As shown in FIG12 , a connecting protrusion 102 is provided on the first air guide surface, and the number of the connecting protrusion 102 is one.

[0087] The second connecting rod 313 and the connecting rod 312 are both rotatably connected to the connecting protrusion 102 and are respectively located on opposite sides of the connecting protrusion 102 to avoid mutual interference between the second connecting rod 313 and the connecting rod 312 during movement or mutual interference between the second connecting rod 313 and the first connecting rod 301 during movement.

[0088] The second connecting rod 313 and the connecting rod 312 may also be located on the same side of the connecting protrusion 102. In this case, one of the second connecting rod 313 and the connecting protrusion 102 is provided with an extension protrusion 103, which is located between the second connecting rod 313 and the connecting protrusion 102 to increase the distance between the second connecting rod 313 and the connecting protrusion 102, thereby avoiding interference between the second connecting rod 313 and the connecting rod 312 during movement, or interference between the second connecting rod 313 and the first connecting rod 301 during movement. Alternatively, one of the connecting rod 312 and the connecting protrusion 102 is provided with an extension protrusion 103, which is located between the connecting rod 312 and the connecting protrusion 102 to increase the distance between the connecting rod 312 and the connecting protrusion 102, thereby avoiding interference between the second connecting rod 313 and the connecting rod 312 during movement, or interference between the second connecting rod 313 and the first connecting rod 301 during movement.

[0089] Optionally, as shown in Figure 16, during the opening process of the first air guide plate 101, the first connecting rod 301 moves along the first straight line segment 509 and the third straight line segment 510 successively, and the second connecting rod 313 moves along the second straight line segment 522 and the fourth straight line segment 523 successively; wherein, the straight lines where the first straight line segment 509 and the third straight line segment 510 are located intersect, and the straight lines where the second straight line segment 522 and the fourth straight line segment 523 are located intersect, and during the opening process of the first air guide plate 101, along the extending direction of the first connecting rod 301, the third straight line segment 510 tilts downward, and the fourth straight line segment 523 tilts upward.

[0090] As shown in Figures 15 and 16, during the opening process of the first air guide plate 101, the broken line motion trajectory of the first connecting rod 301 includes the first straight line segment 509 and the third straight line segment 510, and the first connecting rod 301 first moves along the first straight line segment 509, and then moves along the third straight line segment 510. The broken line motion trajectory of the second connecting rod 313 includes the second straight line segment 522 and the fourth straight line segment 523, and the second connecting rod 313 first moves along the second straight line segment 522, and then moves along the fourth straight line segment 523.

[0091] During the opening of the first air deflector 101, the fourth straight segment 523 tilts upward from the rear to the front, i.e., the second connecting rod 313 tilts upward, thereby driving the first air deflector 101 upward. The third straight segment 510 tilts downward, i.e., the first connecting rod 301 continues to tilt downward, with the first connecting rod 301 and the second connecting rod 313 moving in opposite directions. The rotational connection between the first connecting rod 301 and the connecting rod 312, and the rotational connection between the connecting rod 312 and the first air deflector 101, enables the first air deflector 101 to move upward with the first air guide surface facing downward, placing the first air deflector 101 in the downward-blowing hot air supply position, thus achieving the downward-blowing hot air supply mode.

[0092] Optionally, the connection between the first straight line segment 509 and the third straight line segment 510 corresponds to the connection between the second straight line segment 522 and the fourth straight line segment 523, that is, when the first link 301 changes from moving along the first straight line segment 509 to moving along the third straight line segment 510, the second link 313 just changes from moving along the second straight line segment 522 to moving along the fourth straight line segment 523, so that the first link 301 and the second link 313 cooperate to jointly drive the first air guide plate 101 to move to the target position.

[0093] Optionally, during the opening process of the first air guide plate 101, the first connecting rod 301 moves successively along the third straight line segment 510 and the fifth straight line segment 511, and the second connecting rod 313 moves successively along the fourth straight line segment 523 and the sixth straight line segment 524; wherein, the third straight line segment 510 and the straight line where the fifth straight line segment 511 is located intersect, and the fourth straight line segment 523 and the straight line where the sixth straight line segment 524 is located intersect.

[0094] As shown in Figures 19 and 20, during the opening process of the first air guide plate 101, the broken line motion trajectory of the first connecting rod 301 includes the first straight line segment 509, the third straight line segment 510 and the fifth straight line segment 511 connected in sequence, and the first connecting rod 301 moves along the first straight line segment 509, the third straight line segment 510 and the fifth straight line segment 511 in succession, and the broken line motion trajectory of the second connecting rod 313 includes the second straight line segment 522, the fourth straight line segment 523 and the sixth straight line segment 524, and the second connecting rod 313 moves along the second straight line segment 522, the fourth straight line segment 523 and the sixth straight line segment 524 in succession.

[0095] During the opening process of the first air guide plate 101 , along the extending direction of the first connecting rod 301 , ie, along the direction from back to front, the fifth straight segment 511 tilts upward or extends horizontally, and the sixth straight segment 524 tilts upward.

[0096] In the direction from back to front, the sixth straight segment 524 is tilted upward. In this way, when the first air guide plate 101 is opened, the second connecting rod 313 moves along the sixth straight segment 524, and the second connecting rod 313 moves upward, continuing to drive the first air guide plate 101 to move upward.

[0097] When the fifth straight line segment 511 is tilted upward, when the first link 301 moves along the fifth straight line segment 511 from back to front, the first link 301 moves tilted upward; when the fifth straight line segment 511 extends horizontally, when the first link 301 moves along the fifth straight line segment 511 from back to front, the first link 301 moves horizontally.

[0098] Optionally, the inclination of the fourth straight segment 523 is smaller than the inclination of the sixth straight segment 524. Thus, when the second connecting rod 313 moves upward along the sixth straight segment 524, the inclination of the second connecting rod 313 is greater than when the second connecting rod 313 moves upward along the fourth straight segment 523. As a result, the second connecting rod 313 moves upward along the sixth straight segment 524 with a greater amplitude, thereby driving the first air guide 101 to continue to move upward and to the maximum air supply position without loss of air.

[0099] The air conditioner includes an indoor unit 100 and an outdoor unit. The indoor unit 100 and the outdoor unit are connected via a connecting pipe to realize the circulation of refrigerant in the indoor unit 100 and the outdoor unit.

[0100] The indoor unit 100 includes a housing, an evaporator, and a fan. The housing defines an air duct 107. The evaporator and fan are located within the air duct 107. The housing also has an air inlet and an air outlet. Air enters the air duct 107 through the air inlet under the action of the fan, exchanges heat with the evaporator, and then flows out through the air outlet.

[0101] The air outlet includes a first air outlet 105 , and the first air guide plate 101 is movably provided at the first air outlet 105 for opening or closing the first air outlet 105 . The air duct 107 includes a first air duct, and the first air duct is provided corresponding to the first air outlet 105 .

[0102] The lossless maximum air supply mode includes two situations. In the first situation, as shown in Figure 17, the first air guide plate 101 is located above the extension line of the upper edge of the first air duct, does not participate in the air guidance, and does not affect the air outlet direction of the first air outlet 105.

[0103] In the second case, as shown in FIG42 , the first air guide plate 101 is located in the first air duct, parallel to the air outlet direction of the first air duct, and air flows through both the upper and lower surfaces of the first air guide plate 101, thereby eliminating condensation on the first air guide plate 101. In this case, the lower surface serves as the first air guide surface.

[0104] As shown in Figures 17 to 20, when the fifth straight line segment 511 is tilted upward from the back to the front, the inclination of the fifth straight line segment 511 is smaller than the inclination of the sixth straight line segment 524, and the first air guide plate 101 is driven by the second connecting rod 313 to continue to move upward, and at the same time cooperates with the first connecting rod 301 and the connecting rod 312 to realize the continued upward rotation of the first air guide surface, and the first air guide plate 101 moves to the lossless maximum air supply position, realizing the lossless maximum air supply mode of the first situation.

[0105] As shown in Figure 42, when the fifth straight line segment 511 extends in the horizontal direction, the lossless maximum air supply position of the first air guide plate 101 is lower than the lossless maximum air supply position of the first air guide plate 101 when the fifth straight line segment 511 is tilted upward. At this time, the lossless maximum air supply mode of the second situation can be achieved.

[0106] Optionally, the connection point between the third straight segment 510 and the fifth straight segment 511 corresponds to the connection point between the fourth straight segment 523 and the sixth straight segment 524. That is, when the first connecting rod 301 switches from moving along the third straight segment 510 to moving along the fifth straight segment 511, the second connecting rod 313 just switches from moving along the fourth straight segment 523 to moving along the sixth straight segment 524. Thus, the first connecting rod 301 and the second connecting rod 313 cooperate to jointly drive the first air deflector 101 to the target position.

[0107] The driving device 300 also includes a driving assembly 600, which is driven and connected to the first connecting rod 301 and the second connecting rod 313. During the opening process of the first air guide plate 101, the driving assembly 600 drives the first connecting rod 301 and the second connecting rod 313 to move, and the movement speed of the first connecting rod 301 is less than the movement speed of the second connecting rod 313.

[0108] The second connecting rod 313 is directly connected to the first air deflector 101 for rotation, while the second connecting rod 313 is connected to the first air deflector 101 for rotation via the connecting rod 312. Therefore, the second connecting rod 313 has a stronger ability to adjust the position of the first air deflector 101. Therefore, the movement speed of the first connecting rod 301 is set to be lower than the movement speed of the second connecting rod 313.

[0109] The driving device 300 also includes a limit member, which cooperates with the first connecting rod 301 and the second connecting rod 313. During the opening process of the first air guide plate 101, under the action of the driving assembly 600, the first connecting rod 301 and the second connecting rod 313 both cooperate with the limit member to guide the first connecting rod 301 and the second connecting rod 313 to perform at least partial linear motion.

[0110] The driving assembly 600 provides power for the movement of the first connecting rod 301 and the second connecting rod 313, and the limiter provides constraints for the movement of the first connecting rod 301 and the second connecting rod 313, so that the first connecting rod 301 and the second connecting rod 313 both perform at least partial linear motion.

[0111] Optionally, the first connecting rod 301 is provided with a first guide portion 306, and the second connecting rod 313 is provided with a second guide portion 317. During the opening process of the first air guide plate 101, under the action of the driving assembly 600, the limit member cooperates with the first guide portion 306 and the second guide portion 317 to guide the first connecting rod 301 and the second connecting rod 313 to perform a zigzag motion.

[0112] 3 , the first connecting rod 301 is provided with first gear teeth, the second connecting rod 313 is provided with second gear teeth, and the driving assembly 600 includes a motor, a first gear 602 and a second gear 603. For ease of description, the first motor 601 is referred to herein as the first motor 601.

[0113] The first motor 601 is connected to the first gear 602 and the second gear 603, driving the first gear 602 and the second gear 603 to rotate in the same direction. The first gear 602 meshes with the first gear teeth to drive the first connecting rod 301; the second gear 603 meshes with the second gear teeth to drive the second connecting rod 313. The first gear 602 and the second gear 603 are coaxially arranged, and the radius of the first gear 602 is smaller than the radius of the second gear 603.

[0114] The first gear 602 and the second gear 603 are coaxially arranged to facilitate the connection between the first gear 602 and the second gear 603 and the first motor 601 , and the first motor 601 can simultaneously drive the first gear 602 and the second gear 603 to rotate.

[0115] The angular velocity of the first gear 602 and the second gear 603 are the same, and the radius of the first gear 602 is smaller than the radius of the second gear 603. In this way, the linear velocity of the first gear 602 is smaller than the linear velocity of the second gear 603, so that the movement speed of the first connecting rod 301 is smaller than the movement speed of the second connecting rod 313.

[0116] Alternatively, the linear velocity of the first gear 602 may be equal to the linear velocity of the second gear 603 , so that the movement speed of the first connecting rod 301 is equal to the movement speed of the second connecting rod 313 .

[0117] Optionally, as shown in FIG. 5 and FIG. 7 , the first gear tooth includes a first gear tooth segment 302 , and the second gear tooth includes a second gear tooth segment 314 . The first gear tooth segment 302 and the second gear tooth segment 314 correspond to each other and are both straight line segments.

[0118] Since the first gear tooth segment 302 and the second gear tooth segment 314 are both straight segments, when the first gear 602 is meshed with the first gear tooth segment 302 , the second gear 603 is meshed with the second gear tooth segment 314 . At this time, the first connecting rod 301 moves linearly along the first straight segment 509 , and the second connecting rod 313 moves linearly along the second straight segment 522 .

[0119] From the rear to the front, the first gear tooth segment 302 is tilted downward, and the second gear tooth segment 314 is tilted downward. The tilt of the first gear tooth segment 302 is smaller than that of the second gear tooth segment 314 .

[0120] As shown in Figure 13, when the first gear 602 meshes with the first gear segment 302 and the second gear 603 meshes with the second gear segment 314, the first connecting rod 301 and the second connecting rod 313 move downward, and the first air deflector 101 opens downward. Because the inclination of the first gear segment 302 is less than that of the second gear segment 314, the downward inclination of the first connecting rod 301 is less than that of the second connecting rod 313. Under the guidance of the second connecting rod 313, the first air deflector 101 moves downward significantly, driving it to the horizontal blowing cooling air supply position.

[0121] Optionally, as shown in Figures 5 and 7, the first gear teeth also include a straight third gear tooth segment 303. During the opening process of the first air guide plate 101, the first gear 602 engages with the first gear tooth segment 302 and the third gear tooth segment 303 in succession. When the first air guide plate 101 is in the closed state, the third gear tooth segment 303 is tilted downward from the back to the front and forms an angle at the connection with the first gear tooth segment 302; the second gear teeth also include a straight fourth gear tooth segment 315. During the opening process of the first air guide plate 101, the second gear 603 engages with the second gear tooth segment 314 and the fourth gear tooth segment 315 in succession. When the first air guide plate 101 is in the closed state, the fourth gear tooth segment 315 is tilted upward from the back to the front.

[0122] As shown in Figure 21, when the first gear 602 is engaged with the third gear tooth segment 303, the second gear 603 is engaged with the fourth gear tooth segment 315, the first connecting rod 301 moves downward along the third straight line segment 510, and the second connecting rod 313 moves upward along the fourth straight line segment 523, so that under the guidance of the second connecting rod 313, the first air guide plate 101 flips upward and moves to the downward blowing hot air supply position.

[0123] Optionally, the inclination of the first gear tooth segment 302 is greater than the inclination of the third gear tooth segment 303, so that when the first gear 602 is engaged with the first gear tooth segment 302, the inclination of the downward movement of the first connecting rod 301 is greater than the inclination of the downward movement of the first connecting rod 301 when the first gear 602 is engaged with the third gear tooth segment 303, so that when the first gear 602 is engaged with the third gear tooth segment 303, the first air guide plate 101 is flipped upward under the drive of the second connecting rod 313.

[0124] Optionally, as shown in Figures 5 and 7, the first gear teeth also include a straight fifth gear tooth segment 304. During the opening process of the first air guide plate 101, the first gear 602 engages with the third gear tooth segment 303 and the fifth gear tooth segment 304 in succession. When the first air guide plate 101 is closed, the fifth gear tooth segment 304 is tilted upward (as shown in Figure 5) or extends horizontally (as shown in Figure 30) from the back to the front; the second gear teeth also include a straight sixth gear tooth segment 316. During the opening process of the first air guide plate 101, the first gear 602 engages with the fourth gear tooth segment 315 and the sixth gear tooth segment 316 in succession. When the first air guide plate 101 is closed, the sixth gear tooth segment 316 is tilted upward (as shown in Figure 5) from the back to the front and forms an angle at the connection with the fourth gear tooth segment 315.

[0125] As shown in Figure 17, when the first gear 602 meshes with the fifth gear tooth segment 304 and the second gear 603 meshes with the sixth gear tooth segment 316, the first connecting rod 301 moves along the fifth straight segment 511, and the second connecting rod 313 moves along the sixth straight segment 524. When the first air deflector 101 is closed, when both the fifth gear tooth segment 304 and the sixth gear tooth segment 316 tilt upward from back to front, the first connecting rod 301 and the second connecting rod 313 both tilt upward, thereby driving the first air deflector 101 to continue moving upward to the lossless maximum air supply position, achieving the lossless maximum air supply mode of the first scenario. When the first air guide plate 101 is in the closed state, along the direction from back to front, when the sixth gear tooth segment 316 tilts upward and the fifth gear tooth segment 304 extends horizontally, the first connecting rod 301 moves horizontally and the second connecting rod 313 moves tilted upward, thereby driving the first air guide plate 101 to continue to move upward to the lossless maximum air supply position, as shown in Figure 42, realizing the lossless maximum air supply mode of the second situation.

[0126] Optionally, the inclination of the fourth gear tooth segment 315 is smaller than the inclination of the sixth gear tooth segment 316, so that when the first gear 602 is engaged with the sixth gear tooth segment 316, the inclination of the upward movement of the second connecting rod 313 is greater than the inclination of the upward movement of the second connecting rod 313 when the first gear 602 is engaged with the fourth gear tooth segment 315, so that when the first gear 602 is engaged with the sixth gear tooth segment 316, it can drive the second connecting rod 313 to move upward significantly, so that the first air guide plate 101 moves to the maximum air supply position without loss.

[0127] Optionally, when the first air guide plate 101 is closed and the fifth gear tooth segment 304 is tilted upward from the rear to the front, the tilt degree of the fifth gear tooth segment 304 is smaller than the tilt degree of the sixth gear tooth segment 316 .

[0128] In this way, when the first gear 602 is engaged with the fifth gear tooth segment 304, the inclination degree of the upward movement of the first connecting rod 301 is less than the inclination degree of the upward movement of the second connecting rod 313 when the second gear 603 is engaged with the sixth gear tooth segment 316, so that the second connecting rod 313 can take the lead in driving the first air guide plate 101 to continue to move upward, and cooperate with the first connecting rod 301 and the connecting rod 312 to drive the first air guide plate 101 to move to the lossless maximum air supply position.

[0129] Optionally, as shown in Figures 25 to 42, the air guide plate further includes a second air guide plate 104, the air outlet includes a second air outlet 106, and the air duct includes a second air duct, the second air duct being connected to the second air outlet. The second air guide plate 104 is movably disposed at the second air outlet 106 to open or close the second air outlet 106. The second air outlet 106 is located above the first air outlet 105.

[0130] The driving device 300 further includes a third connecting rod 323 , which is connected to the second air guide plate 104 . When the second air guide plate 104 is opened, the third connecting rod 323 performs a folded line motion and an arc motion in sequence.

[0131] The second air guide plate 104 first makes a zigzag motion, and the position of the second air guide plate 104 is adjusted first, instead of directly rotating the second air guide plate 104 out, so that the second air guide plate 104 can be pushed outward (forward) first, avoiding interference between the second air guide plate 104 and the first air guide plate 101 or the shell.

[0132] After the second air guide plate 104 has completed the broken line movement, it rotates out along the arc, as shown in Figure 36, to achieve horizontal upward air supply (the second air guide plate is in the open position at this time). The air guide surface of the second air guide plate 104 is the second air guide surface. At this time, the second air guide surface 109 is upward.

[0133] Optionally, as shown in Figure 34, during the opening process of the second air guide plate 104, the third connecting rod 323 moves successively along the first sub-straight segment 528 and the second sub-straight segment 529, wherein the first sub-straight segment 528 extends outward (horizontally) and the second straight segment 522 is inclined along the extending direction of the third connecting rod 323.

[0134] When the second air guide plate 104 is located above the first air guide plate 101 , the second sub-straight segment 529 is inclined upward, and the first sub-straight segment 528 can be extended horizontally or inclined upward.

[0135] During the opening process of the second air deflector 104, the third connecting rod 323 first moves linearly along the first sub-straight segment 528, and then along the second sub-straight segment 529. The first sub-straight segment 528 extends outward. As the third connecting rod 323 moves along the first sub-straight segment 528 during the opening process of the second air deflector 104, it pushes outward, driving the second air deflector 104 outward, preventing interference between the second air deflector 104 and the first air deflector 101 or the housing. The third connecting rod 323 then moves along the second sub-straight segment 529. From back to front, the second sub-straight segment 529 tilts upward, and the third connecting rod 323 moves upward, driving the second air deflector 104 upward, further increasing the distance between the second air deflector 104 and the first air deflector 101, preparing for the subsequent rotation of the second air deflector 104.

[0136] The first sub-straight segment 528 can extend in the horizontal direction, or it can be slightly inclined upward in the direction from back to front, and the degree of inclination is smaller than the degree of inclination of the second sub-straight segment 529. For example, the angle between the first sub-straight segment 528 and the horizontal direction is less than or equal to 10°. The smaller angle of inclination can also ensure that when the third connecting rod 323 moves along the first sub-straight segment 528, the second air guide plate 104 does not interfere with the shell.

[0137] Optionally, during the opening process of the second air guide plate 104, the third connecting rod 323 performs linear motion along the first sub-straight segment 528, the second sub-straight segment 529 and the third sub-straight segment 530 in succession, wherein, along the extension direction of the third connecting rod 323, the third sub-straight segment 530 is inclined upward and the degree of inclination is greater than that of the second sub-straight segment 529.

[0138] During the opening process of the second air deflector 104, the third connecting rod 323 moves in an arc-shaped manner, sequentially along the first sub-straight segment 528, the second sub-straight segment 529, and the third sub-straight segment 530. From the rear to the front, the third sub-straight segment 530 tilts upward, and the third connecting rod 323 continues its tilted upward movement. At this point, after the third connecting rod 323 has moved along the first sub-straight segment 528 and the second sub-straight segment 529, the distance between the second air deflector 104 and the housing is greater. Therefore, the second air deflector 104 can move upward to a greater extent without colliding with the housing. Therefore, the inclination of the third sub-straight segment 530 is designed to be greater than that of the second sub-straight segment 529. This allows the third connecting rod 323 to tilt upward along the third sub-straight segment 530 more than when it moves along the second sub-straight segment 529. This effectively increases the distance between the second air deflector 104 and the first air deflector 101.

[0139] Optionally, the length of the broken line is less than the length of the arc, where the length of the broken line refers to the sum of the lengths of all straight line segments included in the broken line, for example, the sum of the lengths of the first sub-straight line segment 528, the second sub-straight line segment 529, and the third sub-straight line segment 530.

[0140] The main function of the fold line is to drive the second air deflector 104 upward and outward to prevent the second air deflector 104 from interfering with the first air deflector 101 or the housing. Therefore, the fold line does not need to be too long. Too long will increase the movement range of the third connecting rod 323 and increase the space occupied by the driving device 300.

[0141] As shown in Figures 30 and 33, the drive device 300 also includes a second motor 605 and a third gear 606. The second motor 605 is drivingly connected to the third gear 606, driving the third gear 606 to rotate. The third connecting rod 323 is provided with third gear teeth that mesh with the third gear 606. The third gear teeth include a seventh gear tooth segment 324, an eighth gear tooth segment 325, a ninth gear tooth segment 326, and an arcuate gear tooth segment 327.

[0142] During the opening of the second air guide plate 104, the seventh gear tooth segment 324, the eighth gear tooth segment 325, the ninth gear tooth segment 326, and the arcuate gear tooth segment 327 sequentially mesh with the third gear 606. The seventh gear tooth segment 324, the eighth gear tooth segment 325, and the ninth gear tooth segment 326 are linear, and the arcuate gear tooth segment 327 is arcuate.

[0143] When the third gear 606 is engaged with the seventh gear tooth segment 324, the third connecting rod 323 moves along the first sub-straight segment 528; when the third gear 606 is engaged with the eighth gear tooth segment 325, the third connecting rod 323 moves along the second sub-straight segment 529; when the third gear 606 is engaged with the ninth gear tooth segment 326, the third connecting rod 323 moves along the third sub-straight segment 530; when the third gear 606 is engaged with the arc gear tooth segment 327, the third connecting rod 323 moves along the arc.

[0144] The drive mechanism of the drive device 300 includes a first drive structure 60 and a second drive structure 604. The first drive structure 60 is drivingly connected to the first air deflector 101; the second drive structure 604 is drivingly connected to the second air deflector 104. The first drive structure 60 includes a drive assembly 600 and connecting rods, wherein the connecting rods include the first connecting rod 301 and the second connecting rod 313. The second drive structure 604 includes a third connecting rod 323 and a driving member for driving the third connecting rod 323. For example, as shown in Figure 30, the driving member includes a third gear 606 and a second motor 605.

[0145] The limiting member includes a box body 5 , which is fixed to the housing. As shown in FIG25 and FIG30 , the box body 5 includes a first side wall 50 , which is disposed between the first driving structure 60 and the second driving structure 604 .

[0146] The first side wall 50 isolates the first driving structure 60 and the second driving structure 604 to avoid interference between the first driving structure 60 and the second driving structure 604 during movement.

[0147] Optionally, as shown in Figure 33, the third connecting rod 323 is provided with a first limiting structure 328; as shown in Figure 30, the first side wall 50 is provided with a first guide matching portion 502 and a first limiting matching structure 512, the first guide portion cooperates with the first guide matching portion 502 to guide the first driving structure 60 to drive the first air guide plate 101 to move, and the first limiting structure 328 cooperates with the first limiting matching structure 512 to guide the second driving structure 604 to drive the second air guide plate 104 to move.

[0148] The first side wall 50 can guide both the first driving structure 60 and the second driving structure 604 , thereby increasing the function of the first side wall 50 and improving the integration of the driving device 300 .

[0149] The first guide matching portion 502 is arranged on the surface of the first side wall 50 facing the first driving structure 60 to facilitate the matching of the first guide matching portion 502 with the first guide portion; the first limiting matching structure 512 is arranged on the surface of the first side wall 50 facing the second driving structure 604 to facilitate the matching of the first limiting matching structure 512 with the first limiting structure 328.

[0150] Optionally, a surface of the first side wall 50 facing the first driving structure 60 or the surface facing the second driving structure 604 is provided with a protrusion 708 , and the first guide matching portion 502 and the first position-limiting matching structure 512 are both provided on the protrusion.

[0151] The thickness of the first sidewall 50 where the bumps are provided is increased, thereby increasing the strength, thereby increasing the strength of the first guide matching portion 502 and the first position-limiting matching structure 512. The thickness of the first sidewall 50 where no bumps are provided remains unchanged, minimizing the cost of the first sidewall 50.

[0152] As shown in Figure 30, after the protrusion is set, the first guide matching part 502 and the first limiting matching structure 512 are both grooves. For example, the groove opening of the first limiting matching structure 512 is flush with the bottom wall of the groove of the first guide matching part 502, ensuring that the grooves of the first guide matching part 502 and the first limiting matching structure 512 are deep enough.

[0153] The connecting rod is arranged in the box body 5. The connecting rod is provided with a guide portion; the box body 5 is provided with a guide matching portion, and the guide portion and the guide matching portion cooperate to guide the connecting rod to perform a broken line movement.

[0154] Optionally, the connecting rod includes a first connecting rod 301 drivingly connected to the guide plate, the guide portion includes a first guide portion 306 provided on the first connecting rod 301, the first side wall 50 is provided with a first guide matching portion 502, the first guide portion 306 and the first guide matching portion 502 cooperate to guide the first connecting rod 301 to perform a zigzag motion, wherein the guide matching portion includes the first guide matching portion 502.

[0155] The first gear 602 provides power for the movement of the first connecting rod 301 . The first guide portion 306 cooperates with the first guide matching portion 502 to limit the movement trajectory of the first connecting rod 301 and realize the broken line movement of the first connecting rod 301 .

[0156] Optionally, as shown in Figures 5 and 6, the first guide portion 306 includes a first sub-guide portion 307 and a second sub-guide portion 308, the first guide matching portion 502 includes a first sub-guide matching portion 503 and a second sub-guide matching portion 504, the first sub-guide portion 307 and the first sub-guide matching portion 503 cooperate, and the second sub-guide portion 308 and the second sub-guide matching portion 504 cooperate to jointly guide the first connecting rod 301 to perform a zigzag motion.

[0157] The first sub-guide portion 307 and the second sub-guide portion 308 are provided, and the corresponding first sub-guide mating portion 503 and the second sub-guide mating portion 504 are provided, so that there are multiple guide portions between the first connecting rod 301 and the first side wall 50, thereby guiding the first connecting rod 301 to move smoothly in a folding line. Especially when the first connecting rod 301 is long, if there is only one guide portion between the first connecting rod 301 and the first side wall 50, the first connecting rod 301 will move unsteadily, and may become detached from the first side wall 50 or become stuck at the bend of the folding line.

[0158] Optionally, the first sub-guide portion 307 and the second sub-guide portion 308 are sequentially arranged along the length direction of the first connecting rod 301 to guide the first connecting rod 301 to perform a smooth folding motion at all locations along the length direction.

[0159] The first sub-guide fitting portion 503 and the second sub-guide fitting portion 504 are sequentially arranged along the front-to-back direction.

[0160] 7 , the connecting rod further includes a second connecting rod 313 , the guide portion further includes a second guide portion 317 provided on the second connecting rod 313 , and the box body 5 includes a second side wall 515 disposed opposite to the first side wall 50 . The first driving structure 60 is disposed between the first side wall 50 and the second side wall 515 .

[0161] As shown in FIG. 4 , the second side wall 515 is provided with a second guide fitting portion 516 . The second guide portion 317 cooperates with the second guide fitting portion 516 to guide the second connecting rod 313 to perform a folding motion. The guide fitting portion further includes the second guide fitting portion 516 .

[0162] The second gear 603 provides power for the movement of the second connecting rod 313 . The second guide portion 317 cooperates with the second guide matching portion 516 to limit the movement trajectory of the second connecting rod 313 , thereby realizing the broken line movement of the second connecting rod 313 .

[0163] Optionally, the second guide portion 317 includes a third sub-guide portion 318 and a fourth sub-guide portion 319, the second guide matching portion 516 includes a third sub-guide matching portion 517 and a fourth sub-guide matching portion 518, the third sub-guide portion 318 and the third sub-guide matching portion 517 cooperate, and the fourth sub-guide portion 319 and the fourth sub-guide matching portion 518 cooperate to jointly guide the second connecting rod 313 to perform a zigzag motion.

[0164] The third sub-guide portion 318 and the fourth sub-guide portion 319 are provided, and the corresponding third sub-guide mating portion 517 and the fourth sub-guide mating portion 518 are provided, so that multiple guide portions are provided between the second connecting rod 313 and the second side wall 515, thereby guiding the second connecting rod 313 to move smoothly in a folding line. Especially when the second connecting rod 313 is long, if there is only one guide portion between the second connecting rod 313 and the second side wall 515, the second connecting rod 313 will move unsteadily, and may become detached from the second side wall 515 or become stuck at the bend of the folding line.

[0165] Optionally, the third sub-guide portion 318 and the fourth sub-guide portion 319 are sequentially arranged along the length direction of the second connecting rod 313 to guide the second connecting rod 313 to perform a smooth folding motion at all locations along the length direction.

[0166] The third sub-guide fitting portion 517 and the fourth sub-guide fitting portion 518 are sequentially arranged along the front-to-back direction.

[0167] Optionally, the orthographic projection of the first guide fitting portion 502 on the second side wall 515 at least partially overlaps with the second guide fitting portion 516 .

[0168] In this way, during the opening process of the first air guide plate 101, the movement trajectories of the first connecting rod 301 and the second connecting rod 313 will at least partially overlap, rather than completely not overlap, so that the overall space occupied by the first connecting rod 301 and the second connecting rod 313 during the movement will be reduced, and the space occupied by the entire driving device 300 will be reduced.

[0169] Optionally, the orthographic projection of the first guide fitting portion 502 on the second side wall 515 intersects with the second guide fitting portion 516 .

[0170] During the opening process of the first air deflector 101, both the first connecting rod 301 and the second connecting rod 313 move downward, with the first connecting rod 301 tilted less than the second connecting rod 313, until the first air deflector 101 is in the horizontal cooling position. Subsequently, the first connecting rod 301 continues to move downward, while the second connecting rod 313 moves upward until the first air deflector 101 is in the downward-blowing heating position. Therefore, when the first air deflector 101 moves from the horizontal cooling position to the downward-blowing heating position, the movement trajectories of the first connecting rod 301 and the second connecting rod 313 intersect. Consequently, the orthographic projection of the first guide fitting portion 502 on the second side wall 515 intersects with the second guide fitting portion 516, thereby enabling the first air deflector 101 to have both the horizontal cooling position and the downward-blowing heating position.

[0171] Optionally, the orthographic projection of the first sub-guide fitting portion 503 on the second side wall 515 partially overlaps with the third sub-guide fitting portion 517 , and the orthographic projection of the second sub-guide fitting portion 504 on the second side wall 515 partially overlaps with the fourth sub-guide fitting portion 518 .

[0172] Optionally, the orthographic projection of the first sub-guide fitting portion 503 on the second side wall 515 intersects with the third sub-guide fitting portion 517 , and the orthographic projection of the second sub-guide fitting portion 504 on the second side wall 515 intersects with the fourth sub-guide fitting portion 518 .

[0173] Optionally, one of the guide portion and the guide matching portion is a guide groove 505, and the other is a guide protrusion, and the guide protrusion is provided in the guide groove and can move relative to the guide groove.

[0174] The guide protrusion is matched with the guide groove. The box body 5 guides the connecting rod through the movement of the guide protrusion relative to the guide groove, and guides the connecting rod to perform a broken line movement.

[0175] Optionally, the guide groove is in a broken line shape.

[0176] As shown in Figures 5 and 6, the first guide portion 306 includes a first guide protrusion 309, and the first guide matching portion 502 includes a first guide groove 506. The first guide protrusion 309 is located in the first guide groove 506 and can move relative to the first guide groove 506. As shown in Figure 7, the second guide portion 317 includes a second guide protrusion 320, and the second guide matching portion 516 includes a second guide groove 519. The second guide protrusion 320 is located in the second guide groove and can move relative to the second guide groove. The guide protrusion includes first and second guide protrusions 320, and the guide groove includes first and second guide grooves.

[0177] The first sub-guide portion 307 is a first sub-guide protrusion 310, and the first sub-guide matching portion 503 is a first sub-guide groove 507. The first sub-guide protrusion 310 is located in the first sub-guide groove 507 and can move relative to the first sub-guide groove 507. The second sub-guide portion 308 is a second sub-guide protrusion 311, and the second sub-guide matching portion 504 is a second sub-guide groove 508. The second sub-guide protrusion 311 is located in the second sub-guide groove 508 and can move relative to the second sub-guide groove 508. Specifically, the first guide protrusion 309 includes a first sub-guide protrusion 310 and a second sub-guide protrusion 311, and the first guide groove 506 includes a first sub-guide groove 507 and a second sub-guide groove 508.

[0178] The first sub-guide groove 507 and the second sub-guide groove 508 both include a first straight segment 509, a third straight segment 510 and a fifth straight segment 511 arranged in sequence from the back to the front, that is, the first sub-guide groove 507 and the second sub-guide groove 508 are both in a broken line shape. In this way, during the opening process of the first air guide plate 101, the first sub-guide protrusion 310 and the second sub-guide protrusion 311 move along the first straight segment 509 of the first sub-guide groove 507 and the second sub-guide groove 508 respectively, guiding the first connecting rod 301 to move along the first straight segment 509; then the first sub-guide protrusion 310 and the second sub-guide protrusion 311 move along the third straight segment 510 of the first sub-guide groove 507 and the second sub-guide groove 508 respectively, guiding the first connecting rod 301 to move along the third straight segment 510; finally, the first sub-guide protrusion 310 and the second sub-guide protrusion 311 move along the fifth straight segment 511 of the first sub-guide groove 507 and the second sub-guide groove 508 respectively, guiding the first connecting rod 301 to move along the fifth straight segment 511.

[0179] As shown in Figures 4 and 7, the third sub-guide portion 318 is a third sub-guide protrusion 321, and the third sub-guide mating portion 517 is a third sub-guide groove 520. The third sub-guide protrusion 321 is located within the third sub-guide groove 520 and is movable relative to the third sub-guide groove 520. The fourth sub-guide portion 319 is a fourth sub-guide protrusion 322, and the fourth sub-guide mating portion 518 is a fourth sub-guide groove 521. The fourth sub-guide protrusion 322 is located within the fourth sub-guide groove 521 and is movable relative to the fourth sub-guide groove 521. The second guide protrusion 320 includes third and fourth sub-guide protrusions 322, and the second guide groove includes third and fourth sub-guide grooves 521.

[0180] The third sub-guide groove 520 and the fourth sub-guide groove 521 both include a second straight segment 522, a fourth straight segment 523 and a sixth straight segment 524 arranged in sequence from back to front, that is, the third sub-guide groove 520 and the fourth sub-guide groove 521 are both in a broken line shape. In this way, during the opening process of the first air guide plate 101, the third sub-guide protrusion 321 and the fourth sub-guide protrusion 322 move along the second straight segment 522 of the third sub-guide groove 520 and the fourth sub-guide groove 521 respectively, guiding the second connecting rod 313 to move along the second straight segment 522; then the third sub-guide protrusion 321 and the fourth sub-guide protrusion 322 move along the fourth straight segment 523 of the third sub-guide groove 520 and the fourth sub-guide groove 521 respectively, guiding the second connecting rod 313 to move along the fourth straight segment 523; finally, the third sub-guide protrusion 321 and the fourth sub-guide protrusion 322 move along the sixth straight segment 524 of the third sub-guide groove 520 and the fourth sub-guide groove 521 respectively, guiding the third connecting rod 323 to move along the sixth straight segment 524.

[0181] 25 , the box body 5 further includes a third side wall 525, which is disposed opposite the first side wall 50, and the second side wall 515 and the third side wall 525 are respectively located on opposite sides of the first side wall 50. The second driving structure 604 is located between the third side wall 525 and the first side wall 50.

[0182] As shown in Figures 30 and 33, the third connecting rod 323 is also provided with a second limiting structure 330, and the third side wall 525 is provided with a second limiting matching structure 526. The second limiting structure 330 and the second limiting matching structure 526 cooperate with each other to guide the second driving structure 604 to drive the second air guide plate 104 to move, that is, to guide the third connecting rod 323 to drive the second air guide plate 104 to move.

[0183] The cooperation between the first limiting structure 328 and the first limiting matching structure 512 and the cooperation between the second limiting structure 330 and the second limiting matching structure 526 jointly enable the third connecting rod 323 to first perform a broken line motion and then perform an arc motion.

[0184] The third sidewall 525 has a smaller size than the first sidewall 50 .

[0185] As shown in Figure 30, the first side wall 50 and the second side wall 515 jointly define a space for the first and second connecting rods 301 and 313 to move, while the third side wall 525 and the first side wall 50 jointly define a space for the third connecting rod 323 to move. The first and second connecting rods 301 and 313 require more space for movement, so the first side wall 50 requires a larger size. The space required for the movement of the third connecting rod 323 is reduced, so the gears on the third side wall 525 can be smaller than those on the first side wall 50. This reduces the cost of the third side wall 525 while not affecting the movement of the third connecting rod 323.

[0186] Optionally, the first limiting structure 328 and the second limiting structure 330 are arranged along the length direction of the third connecting rod 323. In other words, the first limiting structure 328 and the second limiting structure 330 are located at different lengths of the third connecting rod 323. In this way, the first limiting structure 328 and the second limiting structure 330 can respectively limit the movement of the third connecting rod 323 at different lengths, thereby improving the smoothness of the movement of the third connecting rod 323 at all locations.

[0187] Optionally, there are multiple second limiting structures 330 (for example, the number of second limiting structures 330 in Figure 33 is two), the number of second limiting matching structures 526 is equal to the number of second limiting structures 330 and corresponds one to one, and multiple second limiting structures 330 are arranged in sequence along the length direction of the third connecting rod 323, and multiple second limiting matching structures 526 are arranged in sequence along the movement direction of the third connecting rod 323 when the second air guide plate 104 is opened.

[0188] A plurality of second limiting structures 330 are provided to limit different lengths of the third connecting rod 323 , thereby improving the smoothness of movement of various locations of the third connecting rod 323 .

[0189] Optionally, the first limiting structure 328 is located between two adjacent second limiting structures 330 .

[0190] Optionally, as shown in Figures 33 and 34, the first limiting structure 328 includes a first limiting protrusion 329, the first limiting matching structure 512 includes a first limiting groove 513, the first limiting protrusion 329 is arranged in the first limiting groove 513 and can move relative to the first limiting groove 513, and through the limiting effect of the first limiting groove 513 on the first limiting protrusion 329, the rotation of the third gear 606 is converted into the third connecting rod 323 first performing a zigzag motion and then a circular arc motion; the second limiting structure 330 includes a second limiting protrusion 331, the second limiting matching structure 526 includes a second limiting groove 527, the second limiting protrusion 331 is arranged in the second limiting groove 527 and can move relative to the second limiting groove 527, and through the limiting effect of the second limiting groove 527 on the second limiting protrusion 331, the rotation of the third gear 606 is converted into the third connecting rod 323 first performing a zigzag motion and then a circular arc motion.

[0191] It is understood that the first limiting structure 328 may be the first limiting groove 513 , the first limiting matching structure 512 may be the first limiting protrusion 329 , the second limiting structure 330 may be the second limiting groove 527 , and the second limiting matching structure 526 may be the second limiting protrusion 331 .

[0192] Optionally, as shown in FIG34 , the first limiting groove 513 and the second limiting groove 527 have the same shape. Each of the first limiting groove 513 and the second limiting groove 527 includes a first sub-straight segment 528 and an arcuate segment 531. During the opening process of the second air deflector 104, the first limiting protrusion 329 sequentially engages with the first sub-straight segment 528 and the arcuate segment 531 of the first limiting groove 513, and the second limiting protrusion 331 sequentially engages with the second sub-straight segment 529 and the arcuate segment 531 of the second limiting groove 527, thereby jointly guiding the third connecting rod 323 to first perform linear motion along the first sub-straight segment 528 and then perform arcuate motion along the arcuate segment 531.

[0193] Optionally, the first limiting groove 513 and the second limiting groove 527 also include a second sub-straight segment 529 , which is located between the first sub-straight segment 528 and the arc segment 531 , and forms an angle at the connection with the first sub-straight segment 528 .

[0194] During the opening process of the second air guide plate 104, the first limiting protrusion 329 cooperates with the first sub-straight segment 528, the second sub-straight segment 529 and the arc segment 531 of the first limiting groove 513 in sequence, and the second limiting protrusion 331 cooperates with the second sub-straight segment 529, the second sub-straight segment 529 and the arc segment 531 of the second limiting groove 527 in sequence, so as to jointly guide the third connecting rod 323 to first perform a linear motion along the first sub-straight segment 528, then perform a linear motion along the second sub-straight segment 529, and then perform an arc motion along the arc segment 531.

[0195] Optionally, the first sub-straight segment 528 extends horizontally or tilts upward, and the second sub-straight segment 529 tilts upward.

[0196] Optionally, the first limiting groove 513 and the second limiting groove 527 also include a third sub-straight segment 530, which is located between the second sub-straight segment 529 and the arc segment 531, and the connection between the third sub-straight segment 530 and the second sub-straight segment 529 forms an angle.

[0197] During the opening process of the second air guide plate 104, the first limiting protrusion 329 cooperates with the first sub-straight segment 528, the second sub-straight segment 529, the third sub-straight segment 530 and the arc segment 531 of the first limiting groove 513 in sequence, and the second limiting protrusion 331 cooperates with the second sub-straight segment 529, the second sub-straight segment 529, the third sub-straight segment 530 and the arc segment 531 of the second limiting groove 527 in sequence to jointly guide the third connecting rod 323 to first perform a linear motion along the first sub-straight segment 528, then perform a linear motion along the second sub-straight segment 529, then perform a linear motion along the third sub-straight segment 530, and finally perform an arc motion along the arc segment 531.

[0198] Optionally, the third sub-straight line segment 530 is inclined upward and the degree of inclination is greater than that of the second sub-straight line segment 529 .

[0199] When the first air deflector 101 is located below the second air deflector 104, the first sub-straight segment 528 extends horizontally or tilts downward, and the second sub-straight segment 529 and the third sub-straight segment 530 both tilt downward, with the third sub-straight segment 530 tilted more than the second sub-straight segment 529. When the first sub-straight segment 528 tilts downward, the second sub-straight segment 529 tilts more than the first sub-straight segment 528.

[0200] The third connecting rod 323 first moves in a zigzag pattern and then in an arc shape. Compared to first moving the third connecting rod 323 in a straight line and then in an arc shape, the zigzag pattern allows for more accurate adjustment of the position of the third connecting rod 323. This prevents collision between the third connecting rod 323 and the housing when the third connecting rod 323 moves relatively small. This reduces the travel of the third connecting rod 323 during the opening of the second air deflector 104, thereby reducing the space occupied by the drive device 300.

[0201] Different positions of the first and second air guides enable different air supply modes for the indoor unit. As shown in Figure 36, when the first air guide is in the downward-blowing heating position and the second air guide is in the open position, a wraparound air supply mode is achieved. As shown in Figure 41, when the first air guide is in the horizontal-blowing cooling air supply position and the second air guide is in the open position, a dual-air guide horizontal upward-blowing high-airflow, wind-resistance-free cooling air supply mode is achieved.

[0202] The movements of the first air guide plate 101 and the second air guide plate 104 in the present application are described below with reference to the accompanying drawings.

[0203] During the opening process of the first air guide plate 101, as shown in Figures 15 and 16, the first gear 602 is engaged with the first gear tooth segment 302, the second gear 603 is engaged with the second gear tooth segment 314, the first connecting rod 301 first moves downward along the first straight segment 509, and the second connecting rod 313 first moves downward along the second straight segment 522, driving the first air guide plate 101 to move to the horizontal cooling position; then, as shown in Figures 23 and 24, the first gear 602 is engaged with the third gear tooth segment 303, the second gear 603 is engaged with the fourth gear tooth segment 315, and the first connecting rod 301 is engaged with the third gear tooth segment 303. The first connecting rod 301 moves downward along the third straight segment 510, and the second connecting rod 313 moves upward along the fourth straight segment 523, driving the first air guide plate 101 to move to the downward blowing heating position; then, as shown in Figures 19 and 20, the first gear 602 is engaged with the fifth gear tooth segment 304, the second gear 603 is engaged with the sixth gear tooth segment 316, the first connecting rod 301 moves horizontally or upward along the fifth straight segment 511, and the second connecting rod 313 moves upward along the sixth straight segment 524, driving the first air guide plate 101 to move to the lossless maximum air supply position.

[0204] During the opening process of the second air guide plate 104, as shown in Figures 38 and 39, the third connecting rod 323 moves along the first sub-straight segment 528, the second sub-straight segment 529 and the third sub-straight segment 530 in sequence, and then moves along the arc segment 531 to move to the horizontal cooling position.

[0205] The first connecting rod 301 , the second connecting rod 313 and the third connecting rod 323 all include a plurality of linear gear tooth segments. The present application also discloses a design method for a transition gear tooth segment 707 between two adjacent linear gear tooth segments.

[0206] The tooth profile design method of the rack 702 in the gear rack 702 meshing structure is such that the rack 702 moves along the first linear trajectory and the second linear trajectory successively. The rack 702 is provided with a first linear gear tooth segment 705 and a second linear gear tooth segment 706 to correspond to the first linear trajectory (F1 direction) and the second linear trajectory respectively.

[0207] The rack 702 can be the first connecting rod 301, in which case the gear is the first gear 602, and the first straight line trajectory can be the first straight line segment 509 and the second straight line segment 522 respectively. In this case, the first straight gear tooth segment 705 and the second straight gear tooth segment 706 are the first gear tooth segment 302 and the third gear tooth segment 303 respectively. The first straight line trajectory can also be the second straight line segment 522 and the third straight line segment 510 respectively. In this case, the first straight gear tooth segment 705 and the second straight gear tooth segment 706 are the third gear tooth segment 303 and the fifth gear tooth segment 304 respectively.

[0208] The rack 702 can also be the second connecting rod 313. In this case, the gear is the first gear 602. The first straight line trajectory can be the second straight line segment 522 and the fourth straight line segment 523 respectively. In this case, the first straight gear tooth segment 705 and the second straight gear tooth segment 706 are the second gear tooth segment 314 and the fourth gear tooth segment 315 respectively. The first straight line trajectory can also be the fourth straight line segment 523 and the sixth straight line segment 524 respectively. In this case, the first straight gear tooth segment 705 and the second straight gear tooth segment 706 are the fourth gear tooth segment 315 and the sixth gear tooth segment 316 respectively.

[0209] The rack 702 can also be the third connecting rod 323. In this case, the gear is the second gear 603. The first straight-line trajectory can be the first sub-straight segment 528 and the second sub-straight segment 529 respectively. In this case, the first straight gear tooth segment 705 and the second straight gear tooth segment 706 are the seventh gear tooth segment 324 and the eighth gear tooth segment 325 respectively. The first straight-line trajectory can also be the second sub-straight segment 529 and the third sub-straight segment 530 respectively. In this case, the first straight gear tooth segment 705 and the second straight gear tooth segment 706 are the eighth gear tooth segment 325 and the ninth gear tooth segment 326 respectively.

[0210] A rack in a rack-and-pinion meshing structure moves successively along a first linear trajectory and a second linear trajectory. The rack is provided with a first linear gear tooth segment and a second linear gear tooth segment, corresponding to the first linear trajectory and the second linear trajectory, respectively. The rack is also provided with a transition gear tooth segment. The tooth profile of the transition gear tooth segment is determined by ∠AOC, wherein the tangent point of the first linear trajectory and the gear pitch circle is A, the tangent point of the second linear trajectory and the gear pitch circle is C, and the rotation center of the gear is O.

[0211] Optionally, when ∠AOC is less than or equal to a first set value, the tooth profile of the transition wheel tooth segment includes one straight tooth profile or multiple straight tooth profiles, wherein the multiple straight tooth profiles are arranged in sequence along the length direction of the rack and there is a corner between two adjacent straight tooth profiles.

[0212] Optionally, when ∠AOC is greater than a first set value, the tooth profile of the transition gear tooth segment includes a circular arc tooth profile; or,

[0213] When ∠AOC is greater than the first set value, ∠AOC is divided into multiple first sub-angles, the transition gear tooth segment includes multiple sub-transition gear tooth segments, the number of sub-transition gear tooth segments is equal to the number of first sub-angles and corresponds one to one, and the tooth profile of each sub-transition gear tooth segment includes one straight tooth profile or multiple straight tooth profiles, wherein the multiple straight tooth profiles are arranged in sequence along the length direction of the rack and there is a fold angle between two adjacent straight tooth profiles.

[0214] Optionally, each first sub-angle is less than or equal to a first set value.

[0215] Optionally, when ∠AOC is greater than a first set value and less than or equal to a second set value, the tooth profile of the transition gear tooth segment is a circular arc tooth profile; or

[0216] When ∠AOC is greater than the second set value, the tooth profile of the transition wheel tooth segment includes a circular arc tooth profile and a straight line tooth profile arranged in sequence along the length direction of the rack, or, ∠AOC is divided into multiple second sub-angles, the transition wheel tooth segment includes multiple sub-transition wheel tooth segments, the number of sub-transition wheel tooth segments is equal to the number of second sub-angles and corresponds one to one, and the tooth profile of each sub-transition wheel tooth segment includes a straight line tooth profile and / or a circular arc tooth profile.

[0217] Optionally, each second sub-angle is less than or equal to a second set value.

[0218] Optionally, when the tooth profile of the transition wheel tooth segment includes arc tooth profiles and straight tooth profiles arranged in sequence along the length direction of the rack, if the number of arc tooth profiles is multiple and / or the number of straight tooth profiles is multiple, the arc tooth profiles and straight tooth profiles are alternately arranged along the length direction of the rack.

[0219] Optionally, when the tooth profile of the transition gear tooth segment includes an arc tooth profile and a straight tooth profile sequentially arranged along the length direction of the rack,

[0220] The degree of inclination of the straight line where the linear tooth profile is located is between the degrees of inclination of the first linear track and the second linear track.

[0221] Optionally, the second set value is 1.5α, where α is the pitch angle of the gear.

[0222] Optionally, the first set value is α, where α is the pitch angle of the gear.

[0223] As shown in Figure 43, the tooth profile design method includes:

[0224] Step S431, calculating the size of ∠AOC, where the tangent point of the first straight line trajectory and the gear pitch circle is A, the tangent point of the second straight line trajectory and the gear pitch circle is C, and the rotation center of the gear is O;

[0225] Step S432 : Designing the tooth profile of the transition gear tooth segment 707 between the first linear gear tooth segment 705 and the second linear gear tooth segment 706 according to the size of ∠AOC.

[0226] ∠AOC can be understood as the angle the gear rotates as rack 702 deflects from its first linear trajectory to its second linear trajectory. Different ∠AOC values ​​affect the tooth profile of transition gear segment 707. Therefore, the tooth profile of transition gear segment 707 needs to be designed based on the size of ∠AOC.

[0227] Assuming the number of gear teeth is Z and the gear diameter is d, the gear module m = d / Z, the pitch angle α = 360 / Z, and the unit is "degree".

[0228] Step S432, designing the tooth profile of the transition gear tooth segment 707 between the first linear gear tooth segment 705 and the second linear gear tooth segment 706 according to the size of ∠AOC, including: designing the tooth profile of the transition gear tooth segment 707 between the first linear gear tooth segment 705 and the second linear gear tooth segment 706 according to the size relationship between ∠AOC and k*α, where α is the pitch angle of the gear, k is a constant, and 1≤k≤1.5.

[0229] The specific tooth profile of the transition gear tooth segment 707 is affected by the size relationship between ∠AOC and k*α. Therefore, the tooth profile of the transition gear tooth segment 707 needs to be designed based on the size relationship between ∠AOC and k*α.

[0230] Optionally, according to the relationship between ∠AOC and k*α, the tooth profile of the transition gear tooth segment 707 between the first linear gear tooth segment 705 and the second linear gear tooth segment 706 is designed, including:

[0231] When ∠AOC is less than or equal to α, the transition gear tooth segment 707 is designed to be a straight tooth profile 704 or multiple straight tooth profiles 704 , wherein the multiple straight tooth profiles 704 are sequentially arranged along the length direction of the rack 702 and there is a corner between two adjacent straight tooth profiles 704 .

[0232] When ∠AOC is less than or equal to α, the transition gear tooth segment 707 cannot accommodate a tooth structure, so the transition gear tooth segment 707 is designed as a straight tooth shape 704. The straight tooth shape 704 is straight.

[0233] Alternatively, ∠AOC is split into multiple sub-angles, each sub-angle is smaller than α, and the transition gear tooth segment 707 is divided into multiple sub-transition gear tooth segments 707, the number of sub-transition gear tooth segments 707 is equal to the number of sub-angles and corresponds one to one, and the tooth profile of each sub-transition gear tooth segment 707 is designed to be a straight tooth profile 704, and the multiple straight tooth profiles 704 are arranged in sequence along the length direction of the rack 702 and there is a fold angle between two adjacent straight tooth profiles 704.

[0234] When the transition gear tooth segment 707 is designed as one or more straight tooth shapes 704 , the first straight gear tooth segment 705 and the second straight gear tooth segment 706 are connected by one or more straight tooth shapes 704 .

[0235] Optionally, according to the relationship between ∠AOC and k*α, the tooth profile of the transition gear tooth segment 707 between the first linear gear tooth segment 705 and the second linear gear tooth segment 706 is designed, including:

[0236] When ∠AOC is greater than α, the transition gear tooth segment 707 is designed to include a circular arc tooth shape 703; or,

[0237] When ∠AOC is greater than α, ∠AOC is split into multiple first sub-angles, each first sub-angle is less than or equal to α, and the transition gear tooth segment 707 is divided into multiple sub-transition gear tooth segments 707, the number of sub-transition gear tooth segments 707 is equal to the number of first sub-angles and corresponds one to one, and the tooth shape of each sub-transition gear tooth segment 707 is designed.

[0238] When ∠AOC is greater than α, the transition gear tooth segment 707 can accommodate the structure of a tooth. Therefore, the transition gear tooth segment 707 can be designed entirely or partially as a circular arc tooth profile 703, wherein the circular arc tooth profile 703 is in the shape of a circular arc. The circular arc tooth profile 703 can achieve a smooth transition between the first linear gear tooth segment 705 and the second linear gear tooth segment 706. The circular arc tooth profile 703 corresponds to a larger ∠AOC. Therefore, compared with the design of the linear tooth profile 704, the number of turns during the movement of the rack 702 can be reduced, and the rack 702 can quickly switch the movement direction.

[0239] Alternatively, ∠AOC is split into multiple first sub-angles, each first sub-angle is less than or equal to α, and the tooth profile on the transition wheel tooth segment 707 corresponding to each first sub-angle is designed. At this time, the tooth profile on the transition wheel tooth segment 707 corresponding to each first sub-angle is designed based on the condition that each first sub-angle is less than or equal to α, wherein the tooth profile on the transition wheel tooth segment 707 corresponding to each first sub-angle is a straight tooth profile 704.

[0240] In one embodiment, the tooth profile design method includes:

[0241] Calculate the size of ∠AOC;

[0242] When ∠AOC is less than or equal to α, the transition gear tooth segment 707 is designed to be a straight tooth profile 704 or a plurality of straight tooth profiles 704 , wherein the plurality of straight tooth profiles 704 are sequentially arranged along the length direction of the rack 702 and there is a fold angle between two adjacent straight tooth profiles 704 ;

[0243] When ∠AOC is greater than α, the transition gear tooth segment 707 is designed to include an arc tooth shape 703; or, when ∠AOC is greater than α, ∠AOC is split into multiple first sub-angles, each first sub-angle is less than or equal to α, and the transition gear tooth segment 707 is divided into multiple sub-transition gear tooth segments 707, the number of sub-transition gear tooth segments 707 is equal to the number of first sub-angles and corresponds one to one, and each sub-transition gear tooth segment 707 is designed.

[0244] Optionally, when ∠AOC is greater than α, the transition gear tooth segment 707 is designed to include an arc tooth shape 703, including:

[0245] As shown in FIG44 , when ∠AOC is greater than α and less than or equal to 1.5*α, the transition gear tooth segment 707 is designed to be a circular arc tooth shape 703;

[0246] When ∠AOC is greater than 1.5*α, the transition gear tooth segment 707 is designed to include an arc tooth profile 703 and a straight tooth profile 704 sequentially arranged along the length direction of the rack 702 .

[0247] When ∠AOC>1.5α, according to motion simulation verification, rack 702 will interfere with the gear when turning. Therefore, when ∠AOC is greater than α and less than or equal to 1.5*α, transition gear tooth segment 707 can accommodate a tooth structure, and transition gear tooth segment 707 can be designed as a circular arc tooth shape 703. In this case, transition gear tooth segment 707 is in an arc shape, and when rack 702 turns from the first linear trajectory to the second linear trajectory, it will not interfere with the gear, that is, rack 702 can turn smoothly.

[0248] It can be understood that when ∠AOC is greater than α and less than or equal to 1.5*α, the design can also be performed according to step S443.

[0249] When ∠AOC is greater than 1.5*α, the transition gear tooth segment 707 is designed to include not only the arc tooth profile 703 but also the straight tooth profile 704 , so as to avoid interference between the rack 702 and the gear during the steering process caused by designing the transition gear tooth segment 707 as the arc tooth profile 703 .

[0250] Optionally, when ∠AOC is greater than 1.5*α, the transition gear tooth segment 707 is designed to include an arc tooth profile 703 and a straight tooth profile 704 sequentially arranged along the length direction of the rack 702, including:

[0251] When there are multiple arc tooth shapes 703 and / or multiple straight tooth shapes 704, the arc tooth shapes 703 and the straight tooth shapes 704 are alternately arranged along the length direction of the rack 702, that is, along the length direction of the rack 702, there are arc tooth shapes 703, straight tooth shapes 704, arc tooth shapes 703, straight tooth shapes 704... in sequence.

[0252] It is understandable that the configuration may also be an arc tooth profile 703 and N sequentially arranged linear tooth profiles 704 , or an arc tooth profile 703 and n sequentially arranged linear tooth profiles 704 , where both N and n are positive integers greater than or equal to 1. That is, there must be at least one linear tooth profile 704 between two adjacent arc tooth profiles 703 .

[0253] Optionally, when ∠AOC is greater than 1.5*α, the transition gear tooth segment 707 is designed to include an arc tooth profile 703 and a straight tooth profile 704 sequentially arranged along the length direction of the rack 702, including:

[0254] Split ∠AOC into multiple second sub-angles, each second sub-angle is less than or equal to 1.5*α, and divide the transition gear tooth segment 707 into multiple sub-transition gear tooth segments 707. The number of sub-transition gear tooth segments 707 is equal to the number of second sub-angles and corresponds one to one. Design the tooth profile of each sub-transition gear tooth segment 707.

[0255] Each second sub-angle is less than or equal to 1.5*α to avoid interference between the rack 702 and the gear when the rack 702 turns. For each second sub-angle, the tooth profile of the corresponding sub-transition gear tooth segment 707 is designed.

[0256] Optionally, at least one second sub-angle is greater than α and less than or equal to 1.5*α, which can reduce design complexity, reduce the number of linear tooth profiles 704, and increase the steering speed of rack 702. Optionally, the at least two second sub-angles are adjacent second sub-angles.

[0257] All second sub-angles can be greater than α and less than or equal to 1.5*α. The sub-transition gear tooth segments 707 corresponding to second sub-angles greater than α and less than or equal to 1.5*α can be multiple linear tooth profiles 704 arranged sequentially along the length of the rack 702, with a kink between adjacent linear tooth profiles 704, or a single arc tooth profile 703. Alternatively, some second sub-angles can be less than α; these second sub-angles must be designed as one or more linear tooth profiles 704.

[0258] In one embodiment, the tooth profile design method includes:

[0259] Calculate the size of ∠AOC;

[0260] When ∠AOC is less than or equal to α, the transition gear tooth segment 707 is designed to be a straight tooth profile 704 or a plurality of straight tooth profiles 704 , wherein the plurality of straight tooth profiles 704 are sequentially arranged along the length direction of the rack 702 and there is a fold angle between two adjacent straight tooth profiles 704 ;

[0261] When ∠AOC is greater than α and less than or equal to 1.5*α, the transition gear tooth segment 707 is designed to be a circular arc tooth shape 703;

[0262] As shown in Figures 45 to 47, when ∠AOC is greater than 1.5*α, ∠AOC is split into multiple second sub-angles, each second sub-angle is less than or equal to 1.5*α, and the transition gear tooth segment 707 is divided into multiple sub-transition gear tooth segments 707. The number of sub-transition gear tooth segments 707 is equal to the number of second sub-angles and corresponds one to one, and the tooth shape of each sub-transition gear tooth segment 707 is designed.

[0263] Optionally, the length of the linear tooth profile 704 is greater than or equal to L, where L is the tooth pitch of the gear, L=πd / Z.

[0264] As shown in Figure 45, the steering angle of the rack 702 when moving from the F1 direction to the F2 direction is ∠AOB. When ∠AOB = 1.5α, the distance D2 that the rack 702 needs to move along the F2 direction is L. When the rack 702 makes the next turn (turning toward the F3 direction), the gear will not interfere with the teeth of the previously designed rack 702. Of course, the smaller the steering angle, the smaller the distance D2 that needs to be moved. Among them, when turning from the F1 direction to the F2 direction, the steering angle refers to the angle between the normal line of F1 and the normal line of F2, and when turning from the F2 direction to the F3 direction, the steering angle refers to the angle between the normal line of F2 and the normal line of F3.

[0265] Therefore, the length of each linear tooth 704 is designed to be greater than or equal to L, so as to avoid interference between the gear and the rack 702 when the rack 702 turns.

[0266] In a specific embodiment, as shown in FIG44 , rack 702 moves along direction F1 (first linear trajectory) for a distance D1 and then along direction F3 (second linear trajectory), corresponding to ∠AOC being greater than α and less than or equal to 1.5*α. At this point, the tooth profile of transition gear tooth segment 707 is an arc (arc tooth profile 703).

[0267] In another specific embodiment, as shown in Figures 45 to 47, the rack 702 moves along the F1 direction (first straight line trajectory) for a distance of D1, and then moves along the F3 direction (second straight line trajectory), and the corresponding steering angle ∠AOC is greater than 1.5*α and less than or equal to 3*α. At this time, it is necessary to split ∠AOC into two second sub-angles, namely the included angle β and the included angle γ, and the included angles β and γ are both ≤1.5α, so as to avoid interference between the gear and the rack 702 during the steering process of the rack 702. The transition gear tooth segment 707 is split into two sub-transition gear tooth segments 707, one sub-transition gear tooth segment 707 corresponds to β, and the other sub-transition gear tooth segment 707 corresponds to γ. At this time, the rack 702 moves along the F1 direction for a distance of D1, and then moves along the F2 direction for D2, and D2 ≥ L, and then moves along the F3 direction. The tangent point between the F2 direction and the gear pitch circle is B, ∠AOB=β, ∠BOC=γ, and the inclination degree of the F2 direction is between the inclination degree of the F1 direction and the inclination degree of the F3 direction, that is, the rack 702 gradually turns from the F1 direction to the F2 direction to the F3 direction.

[0268] As shown in Figure 45, the first straight tooth on the rack 702 first meshes with the gear, causing the rack 702 to move a distance D1 along the F1 direction, and then the tooth profile design from the intersection point A to the intersection point B is: according to the tooth profile design of the internal gear meshing with the gear (external gear), wherein the internal gear and the external gear have the same parameters (equal pitch circle diameter, equal number of teeth), and the sub-transition gear tooth segment 707 corresponding to ∠AOB is a circular arc tooth profile 703.

[0269] As shown in FIG45 , the tooth profile design from the intersection point B to the rear: at this time, the movement direction of the rack 702 turns from F1 to F2. According to the tooth profile design of the spur rack 702 meshing with the gear (external gear), it is a straight tooth profile 704 along the F2 direction, and the length D2 of this section of the spur rack 702 ≥ L.

[0270] As shown in Figures 46 and 47, after the rack 702 moves a distance D2 along the F2 direction, the tooth profile design from the intersection point B to the intersection point C is: according to the tooth profile design of the internal gear meshing with the gear (external gear), where the internal gear and the external gear have the same parameters (equal pitch circle diameter, equal number of teeth), which is an arc tooth profile 703.

[0271] Tooth profile design from the tangent point C backward: At this time, the movement direction of the rack 702 turns from F2 to F3, and the second linear gear teeth are formed according to the tooth profile design of the straight rack 702 meshing with the gear (external gear).

[0272] That is, in this case, the transition gear tooth segment 707 includes a circular arc tooth profile 703 , a straight tooth profile 704 and a circular arc tooth profile 703 that are sequentially arranged.

[0273] As shown in FIG48 , the present application further discloses a design method of a driving device 300 , including:

[0274] Step S481, determining the first to nth target positions of the first air guide plate 101, where n is a positive integer greater than 1, and the first air guide plate 101 passes through the first to nth target positions in sequence during the opening process;

[0275] Step S482: Determine points A1, A2, ..., An and B1, B2, ..., Bn, wherein points A1, A2, ..., An are located at the same position relative to the first air deflector 101 at the first to nth target positions, and points B1, B2, ..., Bn are located at the same position relative to the first air deflector 101 at the first to nth target positions, respectively.

[0276] Step S483, determining the positions of points C1, C2, ..., Cn, where B1C1, B2C2, ..., BnCn ​​are all lengths of the connecting rod 312;

[0277] Step S484 , determining the motion trajectory of the second connecting rod 313 according to points A1 , A2 . . . An, and determining the motion trajectory of the first connecting rod 301 according to points C1 , C2 . . . Cn.

[0278] The first to nth target positions can be n of the following: the closed position, the horizontal cooling air supply position, the downward heating air supply position, and the lossless maximum air supply position. For example, if n = 4, the first to nth target positions are the closed position, the horizontal cooling air supply position, the downward heating air supply position, and the lossless maximum air supply position, respectively. For another example, if n = 3, the first to nth target positions are the closed position, the horizontal cooling air supply position, the downward heating air supply position, or the horizontal cooling air supply position, the downward heating air supply position, and the lossless maximum air supply position, respectively.

[0279] The design method of the present application is described below using n=4 as an example. In Figures 49 to 53 , D1, D2, D3, and D4 represent the first air guide plate 101 in the closed position, the horizontal blowing cooling air supply position, the downward blowing heating air supply position, and the lossless maximum air supply position, respectively.

[0280] A1 and B1 are two fixed points located on or outside the first air deflector 101 when the first air deflector 101 is in the closed position. B1C1 is the length of the connecting rod 312, which is a fixed value. A1B1C1 can form a triangle. The lengths of A1B1 and B1C1 remain unchanged. By changing the length of A1C1, the shape of the triangle can be changed, thereby driving points A1 and C1 to different positions and achieving different inclination angles of A1B1. It can be assumed that one end of the connecting rod 312 is drivingly connected to point B1. The first connecting rod 301 is rotationally connected to the connecting rod 312 at point C1. The movement of the first connecting rod 301 drives the connecting rod 312, thereby driving point C1. The second connecting rod 313 is drivingly connected to point A1. During the opening of the first air deflector 101, the first connecting rod 301 drives point C1 to move to points C2, C3, and C4 in sequence, while the second connecting rod 313 drives point A1 to move to points A2, A3, and A4 in sequence. Therefore, the motion trajectory of the second connecting rod 313 can be determined according to the points A1, A2, ..., An, and the motion trajectory of the first connecting rod 301 can be determined according to the points C1, C2, ..., Cn.

[0281] Points A1, A2, ..., An and B1, B2, ..., Bn may be points located on the first air guide plate 101 or may be points located outside the first air guide plate 101 .

[0282] As shown in Figures 49 to 53, points A1, A2...An and B1, B2...Bn are all points located outside the first air guide plate 101. The method for determining points A1, A2...An is as follows: point A1 is set on the inside of the closed position of the first air guide plate 101, and points A2, A3 and A4 are set on the inside of the horizontal blowing cooling air supply position, the downward blowing heating air supply position, and the lossless maximum air supply position of the first air guide plate 101, respectively. The distance from A1 to one end of the first air guide plate 101 in the width direction (the up and down direction of the closed position) in the closed position, the distance from A2 to one end of the first air guide plate 101 in the width direction in the horizontal blowing cooling air supply position, the distance from A3 to one end of the first air guide plate 101 in the width direction in the downward blowing heating air supply position, and the distance from A4 to one end of the first air guide plate 101 in the width direction in the lossless maximum air supply position are equal. The distance from A1 to the other end of the first air guide plate 101 in the width direction of the closed position, the distance from A2 to the other end of the first air guide plate 101 in the width direction of the horizontal blowing cooling air supply position, the distance from A3 to the other end of the first air guide plate 101 in the width direction of the downward blowing hot air supply position, and the distance from A4 to the other end of the first air guide plate 101 in the width direction of the lossless maximum air supply position are equal. Moreover, the vertical distance from A1 to the first air guide plate 101 in the closed position, the vertical distance from A2 to the first air guide plate 101 in the horizontal blowing cooling air supply position, the vertical distance from A3 to the first air guide plate 101 in the downward blowing hot air supply position, and the vertical distance from A4 to the first air guide plate 101 in the lossless maximum air supply position are equal.

[0283] Theoretically, points A1 and B1 can be any two points. However, due to structural space limitations, point A1 is preferably selected near the center of gravity of the first air deflector 101 in the closed position. In the closed position, the connecting rod 312 is rotationally connected to the first air deflector 101 at point B1 via the first rotation axis. The minimum distance between point B1 and point A1 must be greater than the diameter of the first rotation axis.

[0284] Optionally, points C1, C2...Cn need to meet preset conditions, where the preset conditions include: △A1B1C1, △A2B2C2...△AnBnCn all exist, points C1, C2...Cn are respectively located on the same side of A1B1, A2B2...AnBn, and C1C2=m*A1A2, C2C3=m*A2A3,...Cn-1Cn=m*An-1An.

[0285] Points C1, C2, ..., Cn are located on the same side of A1B1, A2B2, ..., AnBn, respectively, meaning they are located on the side of A1B1, A2B2, ..., AnBn facing the air outlet, or on the side away from the air outlet. As shown in Figures 49 to 53, points A1, A2, ..., An, and B1, B2, ..., Bn are all located on the side of the corresponding first air guide plate 101 facing the air outlet. Points C1, C2, ..., Cn are also all located on the side of the corresponding first air guide plate 101 facing the air outlet. ΔA1B1C1, ΔA2B2C2, ..., AnBnCn are all located on the same side of the corresponding first air guide plate 101 and cannot span across both sides of the thickness direction of the corresponding first air guide plate 101. For example, points A1, B1, and C1 are all located on the side of the first air deflector 101 facing the air outlet in the closed position. It is not possible for one point to be located on the side of the first air deflector 101 facing the air outlet in the closed position, while the other point is located on the side of the first air deflector 101 facing away from the air outlet in the closed position. In other words, ΔA1B1C1 is located on the side of the first air deflector 101 facing or away from the air outlet in the closed position, and cannot span the thickness direction of the first air deflector 101 in the closed position.

[0286] Because the connecting rod 312 cannot pass through the thickness direction of the first air guide plate 101 during the opening process of the first air guide plate 101, points C1, C2, ..., Cn are located on the same side of A1B1, A2B2, ..., AnBn, respectively.

[0287] To simplify the design of the drive device 300, the movement speeds of the first connecting rod 301 and the second connecting rod 313 are designed to be constant. Therefore, when the first air guide 101 opens from the n-1th target position to the nth target position, C1C2 = m*A1A2, C2C3 = m*A2A3, ... Cn-1Cn = m*An-1An.

[0288] Optionally, as shown in FIG52 and FIG53 , step S483, determining the positions of points C1, C2, ..., Cn, includes:

[0289] Draw circles with points B1, B2, ..., Bn as the center and R as the radius to obtain n circles;

[0290] Select points C1, C2, ..., Cn on the circumferences of n circles respectively.

[0291] By selecting points C1, C2...Cn on n circles, we can ensure that the lengths of B1C1, B2C2...BnCn are equal.

[0292] Optionally, R is greater than or equal to A1B1.

[0293] In the closed position, the connecting rod 312 is rotatably connected to the first connecting rod 301 at point C1 through the second rotation axis. If R is less than A1B1, the first rotation axis and the second rotation axis may interfere with each other.

[0294] Optionally, after selecting points C1, C2, ..., Cn on the circumferences of n circles respectively, the following steps are further included:

[0295] Verify whether points C1, C2...Cn meet the preset conditions;

[0296] If not satisfied, adjust the positions of points B1, B2...Bn;

[0297] After adjustment, return to the step and draw circles with points B1, B2, ..., Bn as the center and R as the radius to obtain n circles, and reselect points C1, C2, ..., Cn.

[0298] Optionally, as shown in FIG53 , determining the motion trajectory of the first connecting rod 301 according to points C1, C2, ..., Cn includes:

[0299] Two adjacent points among the connecting points C1, C2, ..., Cn are connected to determine the motion trajectory of the first connecting rod 301 according to the line segments C1C2, C2C3, ..., Cn-1Cn.

[0300] Cn-1Cn is the motion trajectory of the first connecting rod 301 when the first air guide plate 101 moves from the n-1th target position to the nth target position. Therefore, after obtaining C1C2, C2C3...Cn-1Cn, the motion trajectory of the first connecting rod 301 from the first target position to the nth target position can be known.

[0301] Optionally, the first connecting rod 301 and the second connecting rod 313 are both provided with gear teeth, and the driving device 300 also includes a first gear 602 drivingly connected to the first connecting rod 301 and a second gear 603 drivingly connected to the second connecting rod 313. The design method also includes: determining the parameters of the first gear 602 and the second gear 603 according to the size of m.

[0302] The size of m reflects the speed ratio of the first connecting rod 301 to the second connecting rod 313. The first connecting rod 301 is driven by the first gear 602, and the second connecting rod 313 is driven by the second gear 603. The parameters of the first gear 602 and the second gear 603 must meet certain requirements to meet the speed ratio of the first connecting rod 301 to the second connecting rod 313.

[0303] Optionally, according to the size of m, the parameters of the first gear 602 and the second gear 603 are determined, including:

[0304] If m=1, the linear velocities of the first gear 602 and the second gear 603 are equal;

[0305] If m≠1, the linear velocities of the first gear 602 and the second gear 603 are not equal.

[0306] If m=1, it means that the speeds of the first connecting rod 301 and the second connecting rod 313 are equal, and the linear speeds of the first gear 602 and the second gear 603 are equal. Taking the first gear 602 and the second gear 603 as an example, the radii of the first gear 602 and the second gear 603 are equal, and the first gear 602 and the second gear 603 are identical.

[0307] If m≠1, it means that the speeds of the first connecting rod 301 and the second connecting rod 313 are not equal, and the linear speeds of the first gear 602 and the second gear 603 are not equal. Taking the first gear 602 and the second gear 603 as an example, the radii of the first gear 602 and the second gear 603 are not equal, or the number of teeth is different.

[0308] Optionally, as shown in FIG53 , determining the motion trajectory of the second connecting rod 313 according to points A1, A2, ..., An includes:

[0309] Two adjacent points among the points A1, A2, ..., An are connected, and the motion trajectory of the first connecting rod 301 is determined according to the line segments A1A2, A2A3, ..., An-1An.

[0310] An-1An is the motion trajectory of the first connecting rod 301 when the first air guide plate 101 moves from the n-1th target position to the nth target position. Therefore, after obtaining A1A2, A2A3...An-1An, the motion trajectory of the first connecting rod 301 from the first target position to the nth target position can be known.

[0311] In a specific embodiment, the design method of the driving device 300 includes:

[0312] Determining first to fourth target positions of the first air guide plate 101;

[0313] Determine points A1, A2, A3, and A4, and determine points B1, B2, B3, and B4;

[0314] Connect A1A2, A2A3, A3A4 to determine the stroke and motion direction (motion trajectory) of the first connecting rod 301 at each stage;

[0315] Draw four circles with B1, B2, B3, and B4 as centers and A1B1 as radii, and determine the ranges of C1, C2, C3, and C4.

[0316] Select C1, C2, C3, and C4 on the circumference of the four circles;

[0317] Connect C1C2, C2C3, C3C4, and use drawing software (such as Solidworks, UG) to make C1 C2 = m*A1A2, C2C3 = m*A2A3, C3C4 = m*A3A4;

[0318] Verify whether C1, C2, C3 and C4 meet the preset conditions;

[0319] If not, adjust points B1, B2, B3, and B4, and return to step 1 to determine points B1, B2, B3, and B4;

[0320] If satisfied, the stroke and movement direction (movement trajectory) of the first connecting rod 301 are determined according to the lengths and directions of C1C2, C2C3, and C3C4.

[0321] An embodiment of the second aspect of the present application provides an air conditioner, comprising a first air guide plate 101 and a driving device 300 for the air guide plate of the air conditioner as described in any one of the above embodiments, wherein the first connecting rod 301 and the second connecting rod 313 are both connected to the first air guide plate 101.

[0322] The air conditioner provided in the embodiment of the second aspect of the present application includes the driving device 300 described in any one of the embodiments of the first aspect, and thus has all the beneficial effects of the driving device 300 described in any one of the embodiments of the first aspect, which will not be repeated here.

[0323] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A rack in a gear-rack meshing structure, characterized in that, The rack moves along a first linear trajectory and a second linear trajectory in sequence. The rack is provided with a first linear tooth section and a second linear tooth section to respectively correspond to the first linear trajectory and the second linear trajectory. The rack is further provided with a transition tooth section, and the tooth profile of the transition tooth section is determined by ∠AOC. Among them, the tangent point of the first linear trajectory and the pitch circle of the gear is A, the tangent point of the second linear trajectory and the pitch circle of the gear is C, and the rotation center of the gear is O.

2. The rack in the gear-rack meshing structure according to claim 1, wherein, When ∠AOC is less than or equal to a first set value, the tooth profile of the transition tooth section includes a straight tooth profile or multiple straight tooth profiles, wherein the multiple straight tooth profiles are arranged in sequence along the length direction of the rack and there is a fold angle between two adjacent straight tooth profiles.

3. The rack in the gear-rack meshing structure according to claim 2, wherein, When ∠AOC is greater than the first set value, the tooth profile of the transition tooth section includes an arc tooth profile; or, When ∠AOC is greater than the first set value, ∠AOC is divided into multiple first sub-angles, the transition tooth section includes multiple sub-transition tooth sections, the number of sub-transition tooth sections is equal to and corresponds one by one to the number of first sub-angles, and the tooth profile of each sub-transition tooth section includes a straight tooth profile or multiple straight tooth profiles, wherein the multiple straight tooth profiles are arranged in sequence along the length direction of the rack and there is a fold angle between two adjacent straight tooth profiles.

4. The rack in the gear-rack meshing structure according to claim 3, wherein, Each first sub-angle is less than or equal to the first set value.

5. The rack in the gear-rack meshing structure according to claim 2, wherein, When ∠AOC is greater than the first set value and less than or equal to a second set value, the tooth profile of the transition tooth section is an arc tooth profile; or When ∠AOC is greater than the second set value, the tooth profile of the transition tooth section includes an arc tooth profile and a straight tooth profile arranged in sequence along the length direction of the rack, or ∠AOC is divided into multiple second sub-angles, the transition tooth section includes multiple sub-transition tooth sections, the number of sub-transition tooth sections is equal to and corresponds one by one to the number of second sub-angles, and the tooth profile of each sub-transition tooth section includes a straight tooth profile and / or an arc tooth profile.

6. The rack in the gear-rack meshing structure according to claim 5, wherein, Each second sub-angle is less than or equal to the second set value.

7. The rack in the rack and pinion meshing structure according to claim 5, wherein, When the tooth profile of the transition tooth section includes an arc tooth profile and a straight tooth profile arranged in sequence along the length direction of the rack, If the number of arc tooth profiles is multiple and / or the number of straight tooth profiles is multiple, the arc tooth profiles and the straight tooth profiles are arranged alternately along the length direction of the rack.

8. The rack in the rack and pinion meshing structure according to claim 7, wherein, When the arc tooth profiles and the straight tooth profiles are arranged alternately along the length direction of the rack, The inclination degree of the straight line where the straight tooth profile is located is between the inclination degrees of the first linear trajectory and the second linear trajectory.

9. The rack in the rack and pinion meshing structure according to any one of claims 5 to 8, wherein, The second set value is 1.5α, where α is the tooth pitch angle of the gear.

10. The rack in the rack and pinion meshing structure according to any one of claims 2 to 9, wherein, The first set value is α, where α is the tooth pitch angle of the gear.

11. The rack in the gear-rack meshing structure according to any one of claims 2 to 9, wherein, The length of the straight tooth profile is greater than or equal to L, where L is the tooth pitch of the gear.

12. An air conditioner, characterized in that, Includes: An indoor unit, comprising a housing and a wind deflector, the housing defining an air duct and having an air outlet communicating with the air duct, the wind deflector being movably disposed at the air outlet; Adopt the rack in the rack and pinion meshing structure as described in any one of claims 1 to 11, the rack being drivingly connected to the wind deflector.

13. A tooth profile design method for a rack in a rack and pinion meshing structure, used to construct the outer shape design of the rack as described in claims 1 to 11.

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