CN212719995U

CN212719995U - Indoor unit of air conditioner

Info

Publication number: CN212719995U
Application number: CN202020973612.XU
Authority: CN
Inventors: 李绪超; 戚丽丽; 冷晓燕
Original assignee: Chongqing Haier Air Conditioner Co Ltd
Current assignee: Chongqing Haier Air Conditioner Co Ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-03-16
Anticipated expiration: 2030-06-01

Abstract

The application relates to the technical field of air conditioners and discloses an air conditioner indoor unit. The air-conditioning indoor unit comprises a shell, a fan, an electric heater and a cleaning assembly; the fan is arranged in the shell; the electric heater is arranged in the shell and forms a spacing space with the fan; the cleaning assembly is arranged in the spacing space, is connected with the electric heater and is arranged as a cleaning fan. This application is through will cleaning the subassembly and place in between electric heater and fan, connect on electric heater, need not to add parts such as installation skeleton, do not occupy extra space, can realize setting up the volume that cleans the air conditioning indoor set of subassembly and can not increase than the volume that does not set up the air conditioning indoor set of subassembly and can not increase the effect.

Description

Indoor unit of air conditioner

Technical Field

The application relates to the technical field of air conditioners, for example to an air conditioner indoor unit.

Background

With the continuous improvement of the living standard of people, the requirement on the comfort level of the indoor environment is higher and higher. In terms of regulating the indoor temperature, an air conditioner has become an indispensable home appliance. An indoor unit of an air conditioner is generally provided with a fan, and a large amount of dust and dirt is deposited on the fan after the fan is operated for a certain period of time. The deposited dust can not only cause unsmooth air outlet of the air conditioner; the air can enter the indoor air along with the outlet air of the indoor unit of the air conditioner, thereby influencing the quality of the indoor air.

At present, for the above situations, in the related art, a mounting framework is additionally arranged at a position suitable for the fan, and a cleaning element is arranged on the mounting framework to clean the fan.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the installation framework is additionally arranged in the shell of the air-conditioning indoor unit, and the volume of the air-conditioning indoor unit is increased compared with the situation that the framework and the cleaning element are not installed, so that the occupied indoor space is larger.

SUMMERY OF THE UTILITY MODEL

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 an air conditioner indoor unit, which aims to solve the problem that when a mounting framework and a cleaning element are additionally arranged, the volume of the air conditioner indoor unit is increased, so that the occupied indoor space is increased.

In some embodiments, the air conditioning indoor unit includes a casing, a fan, an electric heater, and a sweeping assembly; the fan is arranged in the shell; the electric heater is arranged in the shell and forms a spacing space with the fan; the cleaning assembly is arranged in the spacing space, is connected with the electric heater and is arranged as a cleaning fan.

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

the cleaning assembly is arranged between the electric heater and the fan and connected to the electric heater, components such as a mounting framework and the like do not need to be additionally arranged, extra space is not occupied, and the effect that the volume of the air-conditioning indoor unit provided with the cleaning assembly cannot be increased compared with the volume of the air-conditioning indoor unit not provided with the cleaning assembly can be achieved.

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 structural diagram of an air conditioner indoor unit according to an embodiment of the present disclosure;

fig. 2 is a schematic structural view of another air conditioner indoor unit provided in the embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of an adjustment assembly provided by embodiments of the present disclosure;

FIG. 4 is a schematic view of a sweeping assembly provided by embodiments of the present disclosure;

FIG. 5 is a schematic structural diagram of a guide rail provided by the disclosed embodiment;

FIG. 6 is a schematic structural view of another sweeping assembly provided by embodiments of the present disclosure;

fig. 7 is a schematic structural view of another air conditioner indoor unit provided in the embodiment of the present disclosure;

fig. 8 is a schematic structural view of another air conditioning indoor unit provided in the embodiment of the present disclosure;

fig. 9 is a schematic structural view of another air conditioning indoor unit provided in the embodiment of the present disclosure.

Reference numerals:

100. a fan; 200. an electric heater; 300. a sweeping assembly; 310. a guide rail; 311. a body; 312. folding edges; 320. a connecting portion; 321. a rack; 322. a gear; 323. a drive motor; 324. a first connection section; 325. a second connection section; 328. a chute; 330. a brush; 400. an adjustment assembly; 410. a first element; 411. a sleeve; 412. a limiting hole; 413. a limiting bolt; 420. a second element; 421 the column.

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 examples and are not intended 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.

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.

Referring to fig. 1 to 9, an embodiment of the present disclosure provides an indoor unit of an air conditioner, including a casing, a fan 100, an electric heater 200, and a cleaning assembly 300; the fan 100 is arranged in the shell; the electric heater 200 is arranged in the housing and forms a spacing space with the fan 100; the cleaning assembly 300 is disposed in the spaced space, connected to the electric heater 200, and provided to clean the blower fan 100.

By adopting the air-conditioning indoor unit provided by the embodiment of the disclosure, the cleaning assembly 300 can be arranged between the electric heater 200 and the fan 100 and connected to the electric heater 200, and components such as a mounting frame and the like do not need to be additionally arranged, so that no extra space is occupied, and the effect that the volume of the air-conditioning indoor unit provided with the cleaning assembly 300 is not increased compared with the volume of the air-conditioning indoor unit not provided with the cleaning assembly 300 can be realized.

Alternatively, fan 100 may be a crossflow fan 100. Crossflow blower 100 may include a motor and an impeller; the impeller is in a long cylinder shape and is coaxially connected with the motor, and the impeller rotates under the driving of the motor to form airflow. Sweeping assembly 300 is used to sweep fan 100 and may refer to sweeping the impeller of crossflow fan 100.

Generally, in an indoor unit of an air conditioner, an electric heater 200 and a fan 100 are provided, and the installation positions of the electric heater 200 and the fan 100 are relatively fixed, and the distance between the heater and the fan 100 is also fixed due to the fixed installation position, if a cleaning assembly 300 is provided on the electric heater 200, in order to enable the cleaning assembly 300 to effectively perform a cleaning function on the fan 100, in the embodiment of the present disclosure, an adjusting assembly 400 is provided at the connection between the cleaning assembly 300 and the electric heater 200 to adjust the position of the cleaning assembly 300; the position of the cleaning assembly 300 is adjustable, so that the distance between the cleaning assembly 300 and the fan 100 to be cleaned is adjusted, and thus, the cleaning assembly 300 and the fan 100 are in an interference state by additionally arranging the adjusting assembly 400, and the cleaning effect of the cleaning assembly 300 on the fan 100 is better. The distance between the cleaning assembly 300 and the fan 100 can be adjusted according to the dirt degree of the fan 100, so that the cleaning strength of the cleaning assembly 300 to the fan 100 is adjusted, and the cleaning assembly 300 can clean the fan 100 more suitable for the requirements of users.

Optionally, the indoor unit of the air conditioner further includes an adjusting assembly 400, and the adjusting assembly 400 is connected to the cleaning assembly 300 and the electric heater 200 and is configured to adjust a cleaning position of the cleaning assembly 300. In this way, the relative position of the cleaning assembly 300 and the fan 100 can be adjusted according to different dirt levels of the fan 100, so as to adjust the cleaning strength of the cleaning assembly 300 on the fan 100.

Optionally, the adjustment assembly 400 includes a first element 410 and a second element 420; the first element 410 is connected with the electric heater 200; the second member 420 is coupled to the cleaning assembly 300 and movably coupled to the first member 410 to adjust the position of the cleaning assembly 300. Here, the position of the cleaning assembly 300 refers to a relative position of the cleaning assembly 300 and the fan 100.

Optionally, the first element 410 may be connected to the electric heater 200 in one or more of the following ways: a sliding connection mode, a meshing movable connection mode of the gear 322 and the rack 321, and a movable connection mode of matching a lead screw and a nut.

Optionally, first element 410 includes a sleeve 411 and a spacing pin 413; the sleeve 411 is connected with the electric heater 200, and the side wall of the sleeve 411 is provided with a plurality of limiting holes 412; the limiting bolt 413 is inserted into and matched with the limiting hole 412. The limiting bolt 413 is columnar, and the outer diameter of the limiting bolt is smaller than or equal to the inner diameter of the limiting hole 412. Thus, the second element 420 can be abutted against the first element 410 by the insertion fit of the stopper pin 413 and the stopper hole 412.

Alternatively, the limiting holes 412 are sequentially arranged on the side wall of the sleeve 411 along the axial direction of the sleeve 411. The plurality of stopper holes 412 may include a first stopper hole 412 and a second stopper hole 412; the limit bolt 413 is inserted into the first limit hole 412 to serve as a first limit, and when the adjusting assembly 400 is in the first limit state, the relative position of the cleaning assembly 300 and the fan 100 is a first position. The limiting bolt 413 is inserted into the second limiting hole 412 to serve as a second limiting, and when the adjusting assembly 400 is in the second limiting state, the relative position of the cleaning assembly 300 and the fan 100 is a second position. In this way, the adjustment assembly 400 is switched between the first position and the second position, i.e., a change in the relative distance of the sweeping assembly 300 from the fan 100 is achieved, thereby changing the sweeping intensity of the sweeping assembly 300 for the fan 100. In addition, the cleaning assembly 300 is connected to the electric heater 200, and thus, it is not necessary to add a member such as a mounting frame, and thus, it is not necessary to occupy an additional space, and it is possible to achieve an effect that the volume of the air-conditioning indoor unit in which the cleaning assembly 300 is installed is not increased as compared with the volume of the air-conditioning indoor unit in which the cleaning assembly 300 is not installed.

Optionally, the second element 420 includes an adjusting column 421, one end of the adjusting column 421 is fixed to the cleaning assembly 300, and the other end of the adjusting column 421 is disposed in the sleeve 411 and telescopically connected to the sleeve 411. Thus, when the limit bolt 413 is inserted into any limit hole 412, the adjusting column 421 abuts against the limit bolt 413, so that the fixing of the adjusting column 421 is realized, and further, the first element and the second element 420 are switched to a limit state.

Optionally, the first element 410 further comprises an elastic element, the elastic element is disposed in the sleeve 411, one end of the elastic element is connected with the electric heater 200, and the other end of the elastic element is connected with one end of the adjusting column 421 disposed in the sleeve 411. Alternatively, the elastic element may be a spring, the spring is disposed in the sleeve 411, a first end of the spring and a first end of the sleeve 411 are both connected with the electric heater 200, a portion of the adjusting column 421 is disposed in the sleeve 411, and the first end of the adjusting column 421 is connected with a second end of the spring; a portion of the adjustment post 421 disposed outside the sleeve 411 extends from the second end of the sleeve 411. In the process that the adjusting column 421 and the sleeve 411 move relatively, the spring is always in a stretched state, the spring applies a tensile force to the adjusting column 421, when the limiting bolt 413 is inserted into the limiting hole 412, the limiting bolt 413 abuts against one end of the adjusting column 421 in the sleeve 411, and the limiting bolt 413 applies a force to the adjusting column 421 in a direction opposite to the tensile force; therefore, the adjusting column 421 can be fixed to a certain limit state under the combined action of the spring and the limit bolt 413.

Optionally, the adjusting assembly 400 is provided in plurality and is uniformly arranged between the cleaning assembly 300 and the electric heater 200. The electric heater 200 is in the form of a strip, and is disposed in a direction parallel to the axial direction of the blower 100. The adjusting assembly 400 may be uniformly disposed along the extending direction of the electric heater 200, which not only can make the connection relationship between the cleaning assembly 300 and the electric heater 200 more firm, but also can smoothly adjust the relative position between the cleaning assembly 300 and the electric heater 200.

Alternatively, the sweeping assembly 300 may include a body 311, a connecting part 320, and a brush 330; the body 311 may include a first surface and a second surface. The first surface of the body 311 may be connected with the second member 420.

Here, the body 311 may be a rectangular parallelepiped, and any surface of the rectangular parallelepiped may be a first surface, and any surface of the rectangular parallelepiped except for the first surface may be a second surface.

Optionally, the second surface of the body 311 may be provided with a first clamping member, the connecting portion 320 includes a second clamping member, and the connection between the brush 330 and the second surface of the body 311 is realized through clamping cooperation of the first clamping member and the second clamping member.

Optionally, the first clamping member may be disposed on the second surface of the body 311, the first clamping member may be disposed along the axial direction, and a cross section of the first clamping member may be T-shaped. Specifically, the first clamping member includes a first element 410 and a second element 420, the first element 410 may be a rectangular long strip, a long side of the rectangular long strip is connected to the second surface of the body 311 along the axial direction, a cross section perpendicular to the axial direction is rectangular, one side of the rectangular long strip intersects with the long side and is connected to the second surface of the body 311, and the other side of the rectangular long strip is connected to the second element 420. The second member 420 is equal in length to the first member 410 in the axial direction, the second member 420 may also be rectangular in cross section perpendicular to the axial direction, and the width of the second member 420 in this plane is greater than the width of the first member 410.

Optionally, the second surface of the body 311 may be provided with a flange 312. Here, the folded edge 312 may serve as a second snap-fit member, snap-fit with the first snap-fit member; so that the coupling portion 320 is snap-fit with the flange 312. Like this, in practical application, clean the installation and the dismantlement of subassembly 300 very conveniently, need not to increase connecting portion 320, directly will clean subassembly 300 joint in the hem 312 department of the second surface of body 311, during the washing, need not dismantle fan 100, can directly joint or pull down and clean subassembly 300.

Alternatively, the folds 312 may be triangular, trapezoidal, or T-shaped in cross-section. The side of the flap 312 close to the second surface of the body 311 has a smaller width, and the side of the flap 312 away from the second surface of the body 311 has a larger width. In contrast, the connecting portion 320 of the cleaning assembly 300 is provided with a locking groove, and the shape of the locking groove is matched with the folded edge 312. Like this, when needs installation clean subassembly 300, can slide into the draw-in groove along hem 312 one end with cleaning subassembly 300, convenient assembling, after the assembly is accomplished, because hem 312 is kept away from the second surface one side width of body 311 great, can make the connection of hem 312 and draw-in groove more firm.

Optionally, the thickness of the first side of the flap 312 is greater than the thickness of the second side; the first side is a side of the folded edge 312 away from the second surface of the body 311, and the second side is a side of the folded edge 312 close to the second surface of the body 311. For example, the cross-section of the hem 312 may be triangular, trapezoidal, or T-shaped. The side of the flap 312 close to the second surface of the body 311 has a smaller width, and the side of the flap 312 away from the second surface of the body 311 has a larger width. A side of the flange 312 close to the second surface of the body 311 is taken as a first side; the side of the flange 312 away from the second surface of the body 311 serves as a second side. In contrast, the connecting portion 320 of the cleaning assembly 300 is provided with a locking groove, and the shape of the locking groove is matched with the folded edge 312. Like this, when needs installation clean subassembly 300, can slide into the draw-in groove along hem 312 one end with cleaning subassembly 300, convenient assembling, after the assembly is accomplished, because hem 312 is kept away from the second surface one side width of body 311 great, can make the connection of hem 312 and draw-in groove more firm.

Optionally, the outer wall of the folded edge 312 may be further provided with an elastic member, when the clamping groove of the cleaning assembly 300 is clamped with the folded edge 312, the elastic member may not only enable the cleaning assembly 300 to be connected with the second surface of the body 311 more firmly, but also play a role in buffering the connection between the cleaning assembly 300 and the second surface of the body 311. Therefore, the material selection of the second surface of the body 311 can be increased, and even if the second surface of the body 311 changes in a large temperature range, the folded edge 312 expands with heat and contracts with cold, and the cleaning assembly 300 can still be firmly connected with the second surface of the body 311 due to the elastic member arranged between the clamping groove and the folded edge 312.

Alternatively, the elastic member may be a strip, two ends of the elastic member are connected to the outer wall of the folded edge 312, and the elastic member cooperates with the folded edge 312 to define a hollow portion. This increases the elastic deformation range of the elastic member.

Alternatively, the flap 312 may include a top wall and two side walls, and the elastic member may be disposed on the top wall and the elastic member may be symmetrically disposed on the two side walls.

Optionally, the brushes 330 are arranged in a plurality of rows and are uniformly arranged on the connecting portion 320. The connection portion 320 includes a first connection section 324, and the brush 330 is disposed on a first surface of the first connection section 324. The connecting portion 320 further includes a second connecting section 325, and the second connecting section 325 is snap-fitted to the flange 312. Here, the first surface is a surface of the first connection section 324 disposed opposite to the blower 100. Therefore, the brush 330 can be ensured to be in an interference state with the fan 100, so that the fan 100 can be cleaned when the fan 100 runs, the fan 100 does not need to be detached from the indoor unit of the air conditioner, and dust deposited on the fan 100 can be effectively cleaned under the condition that the indoor unit of the air conditioner is not easily damaged.

Optionally, the brushes 330 may be arranged in multiple rows to increase the sweeping effect of the sweeping assembly 300 on the fan 100. Here, the material of the brush 330 is not particularly limited, and the blower 100 may be effectively cleaned.

Optionally, the sweeping assembly 300 includes a guide rail 310, a connecting portion 320, and a brush 330; the guide rail 310 is connected with the adjustment assembly 400; the connecting portion 320 is movably connected with the guide rail 310; the brush 330 is disposed at the connection portion 320. The connecting portion 320 may be slidably engaged with the guide rail 310; the sweeping assembly 300 may further be provided with a driving motor 323, and the driving motor 323 is used for driving the connection part 320 to slide along the guide rail 310.

Optionally, the connecting portion 320 includes a sliding slot 328, and the sliding slot 328 is slidably engaged with the rail 310 to move the brush 330 along the setting direction of the rail 310. The opening edge of the sliding groove 328 is provided with a rib to prevent the sliding groove 328 from being separated from the guide rail 310 in the sliding fit process of the sliding groove 328 and the guide rail 310. The brush 330 is driven by the connection portion 320 to move along the installation direction of the fan 100, so that the cleaning assembly 300 can clean the fan 100 more flexibly.

Optionally, the connection part 320 includes a rack 321, a gear 322, and a driving motor 323; the gear 322 is meshed with the rack 321; the rack 321 is arranged on the guide rail 310; the driving motor 323 drives the gear 322 to rotate so that the brush 330 moves in the arrangement direction of the guide rail 310. The brush 330 is disposed on the first surface of the base, the second surface of the base is provided with a groove, the groove is connected to the rotating shaft of the gear 322, and the brush 330 moves along the direction of the guide rail 310 through the meshing motion of the gear 322 and the rack 321.

In this way, by switching the adjusting assembly 400 between the first position and the second position, the relative distance between the sweeping assembly 300 and the fan 100 is changed, so as to adjust the sweeping strength of the sweeping assembly 300 for the fan 100; the brush 330 moves along the axial direction of the fan 100 by the movement of the guide rail 310 of the cleaning assembly 300 and the connecting part 320, so that the cleaning direction of the brush 330 to the fan 100 is more comprehensive. In addition, the cleaning assembly 300 is connected to the electric heater 200, and thus, it is not necessary to add a member such as a mounting frame, and thus, it is not necessary to occupy an additional space, and it is possible to achieve an effect that the volume of the air-conditioning indoor unit in which the cleaning assembly 300 is installed is not increased as compared with the volume of the air-conditioning indoor unit in which the cleaning assembly 300 is not installed.

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. An indoor unit of an air conditioner, comprising:

a housing;

the fan is arranged in the shell;

the electric heater is arranged in the shell and forms a spacing space with the fan;

and a cleaning assembly disposed in the interval space, connected to the electric heater, and configured to clean the fan.

2. An indoor unit of an air conditioner according to claim 1, further comprising:

an adjustment assembly connecting the cleaning assembly and the electric heater, configured to adjust a cleaning position of the cleaning assembly.

3. An indoor unit of an air conditioner according to claim 2, wherein the adjusting unit includes:

a first element connected with the electric heater;

and the second element is connected with the cleaning assembly and movably connected with the first element, and the position of the cleaning assembly is adjusted.

4. An indoor unit of an air conditioner according to claim 3, wherein the first member includes:

the sleeve is connected with the electric heater, and a plurality of limiting holes are formed in the side wall of the sleeve;

and the limiting bolt is in inserted fit with the limiting hole.

5. An air conditioning indoor unit according to claim 4, wherein the second member includes:

and one end of the adjusting column is fixed with the cleaning assembly, and the other end of the adjusting column is arranged in the sleeve and is in telescopic connection with the sleeve.

6. An indoor unit of an air conditioner according to claim 5, wherein the first member further comprises:

and the elastic element is arranged in the sleeve, one end of the elastic element is connected with the electric heater, and the other end of the elastic element is connected with one end of the adjusting column, which is arranged in the sleeve.

7. An indoor unit of an air conditioner according to claim 2, wherein the plurality of the adjusting units are uniformly arranged between the cleaning unit and the electric heater.

8. An indoor unit of an air conditioner according to any one of claims 2 to 7, wherein the sweeping means includes:

the guide rail is connected with the adjusting component;

the connecting part is movably connected with the guide rail;

and the brush is arranged on the connecting part.

9. An indoor unit of an air conditioner according to claim 8, wherein the connecting portion includes:

and the sliding groove is in sliding fit with the guide rail, so that the brush moves along the arrangement direction of the guide rail.

10. An indoor unit of an air conditioner according to claim 8, wherein the connecting portion includes:

the rack is arranged on the guide rail;

the gear is meshed and matched with the rack;

and the driving motor drives the gear to rotate, so that the brush moves along the arrangement direction of the guide rail.