CN115111752A

CN115111752A - Gear box and air conditioner indoor unit

Info

Publication number: CN115111752A
Application number: CN202110296696.7A
Authority: CN
Inventors: 田志强; 李婧; 顾明亮; 李英舒
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2022-09-27

Abstract

The application relates to the technical field of air conditioners and discloses a gear box. The method comprises the following steps: a motor; the gear is in driving connection with the motor, teeth are arranged on part of the peripheral surface of the gear, and the gear is used for being meshed with a rack connected to a rack connecting plate of the air deflector to drive the air deflector to perform upward opening action or downward opening action; the shell is used for loading the motor, the gear and the rack connecting plate; wherein, the casing includes the opening, and the opening is used for supplying rack connecting plate to rotate. The gear box is internally provided with a motor and a gear, the motor is used for driving the gear to rotate, the gear is meshed with a rack on the rack connecting plate, and the gear can drive the air deflector to perform upward opening action or downward opening action through the rack connecting plate because the rack connecting plate is connected with the air deflector. This application uses a gear can drive the aviation baffle and carry out the opening action, and the opening of casing can supply the rack connecting plate to rotate, gives the sufficient activity space of rack connecting plate. The application also discloses an air conditioner indoor unit.

Description

Gear box and air conditioner indoor unit

Technical Field

The application relates to the technical field of air conditioners, for example, relate to a gear box and machine in air conditioning.

Background

In order to adjust a larger air supply angle, the air deflector of the existing air conditioner generally adopts the following two schemes:

the first scheme is that a large gap is reserved between the air deflector and the air conditioner, so that the air deflector can rotate conveniently. However, the scheme is limited by the air duct, the air deflector rotates little, a large gap is reserved, the appearance is affected, dust is not prevented, dust is accumulated in the air duct of the air conditioner, and the health requirement is not met.

The second scheme is that a mechanical arm type large guide plate is adopted, the whole air deflector is moved out of a machine body through a movement mechanism, then the air deflector rotates along a connecting shaft of the mechanical arm under the control of the movement mechanism, and therefore the air deflector can rotate in a large angle. However, in the scheme, at least two sets of motion mechanisms are required to be adopted to respectively realize the extension and the rotation of the air deflector, the cost of the air conditioner is increased due to the large number of the motion mechanisms, the failure probability is increased due to the large number of the motion mechanisms, and the motion reliability of the air deflector is low.

In the current solutions, there is no simple driving mechanism that cooperates with the air deflector that can be rotated through a large angle.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a gear box and an air conditioner indoor unit, which rotate an air deflector by a driving mechanism with a simple structure.

In some embodiments, the gear box comprises: a motor; the gear is in driving connection with the motor, teeth are arranged on part of the peripheral surface of the gear, and the gear is used for being meshed with a rack connected to a rack connecting plate of the air deflector to drive the air deflector to perform upward opening action or downward opening action; a housing for housing the motor, the gear and the rack connecting plate; wherein the housing includes an opening portion for rotation of the rack connecting plate.

Optionally, the opening is further configured to allow the rack connecting plate to pass out of the housing.

Optionally, the housing comprises: the first casing is provided with a motor accommodating cavity.

Optionally, the housing further comprises: and the second shell is provided with a track part for guiding the rack connecting plate.

Optionally, the track portion comprises a V-shaped track.

Optionally, the rail part comprises a first V-shaped rail, a second V-shaped rail and a third V-shaped rail which are arranged side by side; the first end of the first V-shaped track and the first end of the third V-shaped track are both open ends, the second end of the first V-shaped track and the second end of the third V-shaped track are both closed ends, and both ends of the second V-shaped track are both closed ends.

In some embodiments, the air conditioning indoor unit includes: the aforesaid gear box.

Optionally, the indoor unit of an air conditioner further includes: the air deflector comprises an air deflector body; and the rack connecting plate is arranged on the inner side wall of the air deflector body.

Optionally, the racking plate comprises: the first rack extends towards one end of the rack connecting plate in an arc shape; and the second rack extends towards the other end of the rack connecting plate in an arc shape.

Optionally, the motor is a bidirectional driving motor, the gear is located between the first rack and the second rack, and the gear can drive the first rack or the second rack to rotate; when the gear drives the first rack, the air deflector is opened upwards; when the gear drives the second rack, the air deflector is opened downwards.

The gear box and the air-conditioning indoor unit provided by the embodiment of the disclosure can realize the following technical effects:

the gear box is internally provided with a motor and a gear, the motor is used for driving the gear to rotate, the gear is meshed with a rack on the rack connecting plate, and the rack connecting plate is connected with the air deflector, so that the gear can drive the air deflector to perform upward opening action or downward opening action through the rack connecting plate.

The air guide plate can be driven to move upwards or downwards by using one gear, the opening part of the shell can be used for rotating the rack connecting plate, and sufficient movable space is provided for the rack connecting plate, so that the rack connecting plate can drive the air guide plate to rotate.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic view of a gear box according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of another gear box provided in the embodiments of the present disclosure;

FIG. 3 is a schematic structural diagram of another gear box provided by the disclosed embodiment;

FIG. 4 is a schematic structural diagram of another gear box provided by the disclosed embodiment;

FIG. 5 is a schematic structural diagram of another gear box provided by an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a second housing provided in an embodiment of the present disclosure;

FIG. 7 is a schematic structural view of a tie plate provided in an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of an air conditioning indoor unit according to an embodiment of the present disclosure;

fig. 9 is a schematic structural view of an indoor unit of an air conditioner when an air deflector provided by the embodiment of the present disclosure is in an upward opening state;

fig. 10 is a schematic structural view of an indoor unit of an air conditioner when an air deflector provided by the embodiment of the present disclosure is in a downward opening state;

fig. 11 is a schematic structural view of an air deflector according to an embodiment of the present disclosure.

Reference numerals:

10: a gear box; 11: a first housing; 111: a motor accommodating cavity; 112: a connection board mounting area; 113: an opening part; 12: a second housing; 121: a first V-shaped track; 122: a second V-shaped track; 123: a third V-shaped track; 20: a motor; 30: a gear; 40: a rack connecting plate; 41: a first rack; 42: a second rack; 43: a connecting plate body; 431: a guide structure; 432: a connecting member; 50: an air deflector; 51: the aviation baffle body.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

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 represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

The upward opening state of the present application is a state when the air guide plate 50 is opened upward, and the downward opening state is a state when the air guide plate 50 is opened downward.

In the present application, the upward opening operation is an operation of opening the air guide plate 50 upward, and the downward opening operation is an operation of opening the air guide plate 50 downward.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

As shown in fig. 1-6, embodiments of the present disclosure provide a gear box 10 including a motor 20, a gear 30, and a housing.

The gear 30 is in driving connection with the motor 20, and a part of the circumferential surface of the gear 30 is provided with teeth, and the gear 30 is used for being meshed with a rack on a rack connecting plate 40 connected to the air deflector 50 to drive the air deflector 50 to perform an upward opening action or a downward opening action.

A housing for loading the motor 20, the gear 30 and the rack connection plate 40; wherein the housing includes an opening portion 113, the opening portion 113 being for rotation of the rack connecting plate 40.

By adopting the gear box 10 provided by the embodiment of the disclosure, the motor 20 and the gear 30 are arranged in the gear box 10, the motor 20 is used for driving the gear 30 to rotate, the gear 30 is meshed with the rack on the rack connecting plate 40, and the gear 30 can drive the air deflector 50 to perform an upward opening action or a downward opening action through the rack connecting plate 40 as the rack connecting plate 40 is connected with the air deflector 50.

The air deflector 50 can be driven to open upwards or downwards by using one gear 30, and the opening part 113 of the shell can be used for rotating the rack connecting plate 40, so that enough moving space is provided for the rack connecting plate 40, and the rack connecting plate 40 drives the air deflector 50 to rotate.

As shown in fig. 2, 4 and 5, the opening 113 may optionally be used to allow the rack connecting plate 40 to pass out of the housing.

It can be understood that the rack connecting plate 40 penetrates through the opening portion 113, and the rack connecting plate 40 can rotate in the open space formed by the opening portion 113 to drive the air guiding plate 50 to perform an upward opening operation or a downward opening operation.

As shown in fig. 1 and 3, optionally, the housing includes: the first housing 11 is provided with a motor accommodating chamber 111. It is understood that the motor 20 is installed in the motor accommodating chamber 111, and the first housing 11 serves as a main part for loading the motor 20.

As shown in fig. 6, 9 and 10, optionally, the housing further includes: and a second housing 12 provided with a rail portion for guiding the rack attachment plate 40. It is understood that the second housing 12 serves as a member for guiding the rotation of the rack attachment plate 40.

As an example, the first housing 11 and the second housing 12 are engaged, the first housing 11 is used for loading the motor 20, the gear 30, the rack connecting plate 40, and other components, the second housing 12 is used for guiding the movement of the rack connecting plate 40, and the first housing 11 is provided with an opening 113 for allowing the rack connecting plate 40 to rotate, thereby driving the air deflector 50 to perform an upward opening operation and a downward opening operation.

As another example, as shown in fig. 2 and 6, a connection column is disposed on the second housing 12, a positioning hole matched with the connection column is disposed on the first housing 11, the first housing 11 and the second housing 12 are connected and fixed with the positioning hole through the connection column, and the second housing 12 is mounted on the air deflector bracket, wherein the connection column is located in an area that the rack connection plate 40 does not touch when rotating.

As another example, the gear box 10 is provided with a motor accommodating cavity 111 and a connecting plate mounting area 112, the first housing 11 is of an open structure and includes a mounting opening and an opening 113, the mounting opening is used for the rack connecting plate 40 to cooperate with the second housing 12, and the opening 113 is used for the rack connecting plate 40 to drive the air deflector 50 to rotate.

When the air guide plate is installed, an installation opening of the first shell 11 is arranged towards the second shell 12, the gear box 10 is fixed on the air guide plate support through the second shell 12, the motor 20 is installed in the motor accommodating cavity 111, the motor 20 is connected with the gear 30, the gear 30 is meshed with a rack on the rack connecting plate 40, the rack connecting plate 40 is rotatably installed on the connecting plate installation area 112 and used for driving the air guide plate 50 to perform upward opening action or downward opening action, a guide structure 431 is arranged on the rack connecting plate 40, and the rack connecting plate 40 is in sliding fit or rolling fit with the rail part through the guide structure 431 so as to ensure stable connection of the gear 30 and the rack connecting plate 40.

As shown in connection with fig. 6, optionally, the rail portion comprises a V-shaped rail.

As shown in fig. 6, 8, 9 and 10, the track part optionally comprises a first V-shaped track 121, a second V-shaped track 122 and a third V-shaped track 123 arranged side by side; the first end of the first V-shaped rail 121 and the first end of the third V-shaped rail 123 are both open ends, the second end of the first V-shaped rail 121 and the second end of the third V-shaped rail 123 are both closed ends, and both ends of the second V-shaped rail 122 are both closed ends.

As an example, a first slider, a second slider and a third slider are arranged on the rack connecting plate 40 and respectively matched with the first V-shaped track 121, the second V-shaped track 122 and the third V-shaped track 123, the first V-shaped track 121 and the second V-shaped track 122 are used for guiding the rack connecting plate 40 to drive the air deflector 50 to perform downward opening action, and at this time, the rack connecting plate 40 is separated from the third V-shaped track 123; the second V-shaped track 122 and the third V-shaped track 123 cooperate to guide the rack connecting plate 40 to drive the air deflector 50 to open upward, and at this time, the rack connecting plate 40 is separated from the first V-shaped track 121. The first end of the first V-shaped track 121 and the first end of the third V-shaped track 123 are close to the second V-shaped track 122. Both ends of the second V-shaped rail 122 are closed ends for limiting the range of motion of the rack connecting plate 40 and preventing the rack connecting plate 40 from derailing.

In some embodiments, an air conditioning indoor unit includes: the aforementioned gear box 10.

As shown in fig. 11, optionally, the indoor unit of an air conditioner further includes: the air deflector 50 comprises an air deflector body 51; the rack connecting plate 40 is disposed on an inner sidewall of the air deflector body 51.

As an example, the rack connection plate 40 is provided at both ends of the air deflection body 51 so as to facilitate the installation of the air deflection body 51, and the driving structure such as the gear 30 drives the rack connection plate 40 and the air deflection plate 50.

Optionally, the racking plate 40 comprises: a first rack 41 extending in an arc shape toward one end of the rack link plate 40; and a second rack 42 extending in an arc shape toward the other end of the rack connecting plate 40.

It can be understood that the first ends of the first rack 41 and the second rack 42 are located at the middle lower part of the rack connecting plate 40, the first rack 41 extends in an arc shape towards one end of the rack connecting plate 40, the second rack 42 extends in an arc shape towards the other end of the rack connecting plate 40, the arc center of the first rack 41 is located below one side of the rack connecting plate 40, and the arc center of the second rack 42 is located below the other side of the rack connecting plate 40. The rack connecting plate 40 can rotate by the arc center of the first rack 41 and the arc center of the second rack 42 respectively, and because the arc center of the first rack 41 and the arc center of the second rack 42 are both located at the side part of the rack connecting plate 40, compared with a structure that the rotation center is located at the middle part, the rack connecting plate 40 and the air deflector 50 connected with the rack connecting plate can rotate at a large angle, so that large-area air supply is realized.

Since a part of the circumference of the gear 30 is toothed, it can be understood that: the working face of the gear 30 includes both toothed and non-toothed portions.

As an example, the arc length of the toothed portion is related to the arc length of the first and

second racks

41, 42, the arc length of the toothed portion being smaller than or equal to the arc length of the first and

second racks

41, 42, optionally the toothed portion of the gear 30 is provided with consecutive teeth; optionally, the area of the non-toothed portion is larger than the area of the toothed portion.

As an example, the toothed portion and the non-toothed portion are respectively located on both sides of the working surface of the gear 30, and in the initial state, the non-toothed portion of the gear 30 faces the gap between the first rack 41 and the second rack 42, as shown in fig. 8, when the gear 30 starts to drive the first rack 41, the toothed portion is engaged with the first rack 41, and the non-toothed portion faces the second rack 42, and the gear 30 is not simultaneously engaged with the first rack 41 and the second rack 42, so as to avoid the seizing.

Alternatively, the rack portion is in a U-shaped structure that is open to the outside, the U-shaped structure includes a bottom portion, and a first side portion and a second side portion that extend outward along the bottom portion, the first rack 41 is disposed on the first side portion, and the second rack 42 is disposed on the second side portion, as shown in fig. 7 to 10.

It can be understood that the first rack 41 and the second rack 42 are both arc-shaped structures, the teeth of the first rack 41 and the second rack 42 are both disposed on the convex surface of the arc-shaped structures, the teeth of the first rack 41 and the second rack 42 are both disposed toward the gear 30, the first end of the first rack 41 is close to the first end of the second rack 42, and the second end of the first rack 41 is far from the second end of the second rack 42. The initial position of the gear 30 is located at the bottom of the U-shaped structure, when the gear 30 drives the first rack 41, the rack connecting plate 40 rotates around the arc center of the first rack 41, and drives the air deflector body 51 to rotate, so that the air deflector 50 is in an upward opening state, and when the gear 30 drives the second rack 42, the rack connecting plate 40 rotates around the arc center of the second rack 42, and drives the air deflector body 51 to rotate, so that the air deflector 50 is in a downward opening state.

Optionally, the rack connecting plate 40 is detachably connected to the air deflector body 51, and the rack connecting plate 40 is in snap fit with the air deflector body 51.

Alternatively, the motor 20 is a bidirectional driving motor, the gear 30 is located between the first rack 41 and the second rack 42, and the gear 30 can drive the first rack 41 or the second rack 42 to rotate; when the gear 30 drives the first rack 41, the air deflector 50 is opened upwards; when the gear 30 drives the second rack gear 42, the air deflection plate 50 is opened downward.

It will be appreciated that the motor 20 is a bi-directional drive motor that is capable of driving the gear 30 in both forward and reverse directions. The gear 30 is located between the first rack 41 and the second rack 42, and is used for driving the first rack 41 or the second rack 42; the motor 20 is used for driving the gear 30, and when the gear 30 drives the first rack 41, the air deflector 50 rotates around the arc center of the first rack 41, i.e. the first rotation center, so that the air deflector body 51 is in an upward opening state; when the gear 30 drives the second rack 42, the air deflector body 51 rotates around the second rotation center, which is the arc center of the second rack 42, so that the air deflector body 51 is in a downward opening state. The first rotation center is a virtual rotation axis of the first rack 41, the second rotation center is a virtual rotation axis of the second rack 42, and optionally, the first rotation center and the second rotation center do not overlap.

The gear 30 can be meshed with the first rack 41 or the second rack 42 to drive the first rack 41 or the second rack 42 to rotate, and when the gear 30 drives the first rack 41 to rotate, the gear 30 and the second rack 42 are not in a meshed state; when the gear 30 drives the second rack 42 to rotate, the gear 30 is not engaged with the first rack 41. The first rack 41 is mainly used for enabling the air deflector 50 to be in an upward opening state, the second rack 42 is mainly used for enabling the air deflector 50 to be in a downward opening state, the rack connecting plate 40 mainly plays a role in transmission, and as the first rack 41 and the second rack 42 are installed on the rack connecting plate 40, and the rack connecting plate 40 is connected with the air deflector 50, when the first rack 41 or the second rack 42 moves under the driving of the gear 30, the air deflector 50 also moves along with the first rack 41 or the second rack 42.

As an example, the first rack 41 and the second rack 42 are both arc-shaped structures, a first end of the first rack 41 is close to a first end of the second rack 42, and a second end of the first rack 41 is far away from a second end of the second rack 42. The gear 30 is located at first ends of the first and

second racks

41 and 42 in an initial state while being engaged with the first and

second racks

41 and 42, as shown in fig. 8. At this time, the air guide plate 50 is in a closed state. When the first rack 41 or the second rack 42 needs to be driven by the gear 30, the gear 30 is rotated in the corresponding driving direction and is disengaged from the other rack, and when the air deflector 50 needs to be closed or the air deflector 50 needs to be opened in the other direction, the gear 30 is rotated in the direction opposite to the initial driving direction.

The movement principle of the embodiment of the present disclosure will be described below with reference to fig. 8 to 10.

The teeth of first rack 41 and second rack 42 are all arranged on the convex surface of the arc-shaped structure, the first ends of first rack 41 and second rack 42 are both located at the middle lower part of rack connecting plate 40, first rack 41 is arc-shaped and extends to one end of rack connecting plate 40, second rack 42 is arc-shaped and extends to the other end of rack connecting plate 40, namely, the first end of first rack 41 is close to the first end of second rack 42, and the second end of first rack 41 is far away from the second end of second rack 42. The arc center of the first rack 41 is located below one side of the rack connecting plate 40, and the arc center of the second rack 42 is located below the other side of the rack connecting plate 40. The rack connecting plate 40 can rotate around the arc center of the first rack 41 and the arc center of the second rack 42, respectively, and the gear 30 is located at the first end of the first rack 41 and the second rack 42 in the initial state.

In practice, the gear 30 is engaged with the first and

second racks

41 and 42 at the same time in the initial state. When the air deflector 50 is required to be in an upward opening state, the gear 30 is rotated in a first direction from an initial state, in the process, the gear 30 is disengaged from the second rack 42, and the first rack 41 is driven, at the moment, the first rack 41 rotates by taking a first rotation center as an axis to drive the air deflector 50 to perform an upward opening action, and the size of the upward opening of the air deflector 50 can be adjusted by controlling the rotation angle of the gear 30 or the displacement of the gear 30 on the first rack 41; when the air deflector 50 needs to be closed, the gear 30 is rotated in the second direction, the rack connecting plate 40 is driven to return to the initial position through the first rack 41, and at the moment, the gear 30 is meshed with the first ends of the first rack 41 and the second rack 42 at the same time; when the air deflector 50 needs to be switched from the upward opening state to the downward opening state, the gear 30 is firstly rotated in the second direction, the rack connecting plate 40 is returned to the initial position, then the gear 30 is continuously rotated in the second direction, the gear 30 is disengaged from the first rack 41, the second rack 42 is driven, the second rack 42 rotates around the second rotation center as an axis, the air deflector 50 is driven to perform the downward opening action, and the size of the downward opening of the air deflector 50 can be adjusted by controlling the rotation angle of the gear 30 or the displacement of the gear 30 on the second rack 42.

Similarly, when the air deflector 50 is required to be in a downward opening state, the gear 30 is rotated in a second direction from an initial state, in the process, the gear 30 is disengaged from the first rack 41, and the second rack 42 is driven, at this time, the second rack 42 rotates around a second rotation center as an axis to drive the air deflector 50 to perform a downward opening action, and the downward opening size of the air deflector 50 can be adjusted by controlling the rotation angle of the gear 30 or the displacement of the gear 30 on the second rack 42; when the air deflector 50 needs to be closed, the gear 30 is rotated in the first direction, the rack connecting plate 40 is driven to return to the initial position through the second rack 42, and at this time, the gear 30 is meshed with the first ends of the first rack 41 and the second rack 42 at the same time; when the air deflector 50 needs to be switched from the downward opening state to the upward opening state, the gear 30 is firstly rotated in the first direction, the rack connecting plate 40 is returned to the initial position, then the gear 30 and the second rack 42 are continuously rotated in the first direction, the gear 30 is disengaged from the second rack 42, the first rack 41 is driven, the first rack 41 rotates by taking the first rotation center as an axis, the air deflector 50 is driven to perform the upward opening action, and the size of the upward opening of the air deflector 50 can be adjusted by controlling the rotation angle of the gear 30 or the displacement of the gear 30 on the first rack 41.

Alternatively, when the gear 30 is located on the perpendicular bisector of the connecting line of the arc centers of the first rack 41 and the second rack 42, the air deflector 50 is in the closed state, as shown in fig. 8.

It can be understood that, since the position of the gear 30 is not changed, when the gear 30 drives the first rack 41 or the second rack 42 to rotate, the rack connecting plate 40 will move along with the first rack 41 or the second rack 42, and the arc center connecting line and the perpendicular bisector of the first rack 41 and the second rack 42 will also be in a moving state along with the movement of the rack connecting plate 40, and only when the rack connecting plate 40 returns to the initial position, that is, the gear 30 is engaged with the first rack 41 and the second rack 42 at the same time, the air deflector 50 is in a closed state, and when the gear 30 is engaged with only one of the racks, the air deflector will be in an open state, as shown in fig. 8 to 10.

The motor 20 and the gear 30 are arranged in the gear box 10, the motor 20 is used for driving the gear 30 to rotate, the gear 30 is meshed with racks on the rack connecting plate 40, and the rack connecting plate 40 is connected with the air deflector 50, so that the gear 30 can drive the air deflector 50 to move upwards or downwards through the rack connecting plate 40.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the 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 gear box, comprising:

a motor (20);

the gear (30) is in driving connection with the motor (20), teeth are arranged on part of the peripheral surface of the gear (30), and the gear (30) is used for being meshed with a rack on a rack connecting plate (40) connected to the air deflector (50) to drive the air deflector (50) to perform upward opening action or downward opening action;

a housing for carrying the motor (20), gear (30) and rack attachment plate (40);

wherein the housing includes an opening portion (113), the opening portion (113) being for rotation of the rack link plate (40).

2. The gear box of claim 1,

the opening part (113) is also used for enabling the rack connecting plate (40) to penetrate out of the shell.

3. The gear box of claim 1, wherein the housing comprises:

the first shell (11) is provided with a motor accommodating cavity (111).

4. The gear box of claim 3, wherein the housing further comprises:

a second housing (12) provided with a rail portion for guiding the rack attachment plate (40).

5. The gear box of claim 4,

the rail portion includes a V-shaped rail.

6. The gear box of claim 5,

the rail part comprises a first V-shaped rail (121), a second V-shaped rail (122) and a third V-shaped rail (123) which are arranged side by side;

wherein the first end of the first V-shaped track (121) and the first end of the third V-shaped track (123) are both open ends, the second end of the first V-shaped track (121) and the second end of the third V-shaped track (123) are both closed ends, and both ends of the second V-shaped track (122) are both closed ends.

7. An air-conditioning indoor unit, characterized by comprising a gear box (10) according to any one of claims 1 to 6.

8. An indoor unit of an air conditioner according to claim 7, further comprising:

an air deflector (50) comprising an air deflector body (51);

and the rack connecting plate (40) is arranged on the inner side wall of the air deflector body (51).

9. The indoor unit of claim 8, wherein the rack attachment plate (40) comprises:

a first rack (41) extending in an arc shape toward one end of the rack link plate (40); and (c) and (d),

and the second rack (42) extends towards the other end of the rack connecting plate (40) in an arc shape.

10. An indoor unit of an air conditioner according to claim 9,

the motor (20) is a bidirectional driving motor,

the gear (30) is positioned between the first rack (41) and the second rack (42), and the gear (30) can drive the first rack (41) or the second rack (42) to rotate;

wherein the air deflector (50) opens upwardly when the gear (30) drives the first rack (41); when the gear (30) drives the second rack (42), the air deflector (50) is opened downward.