CN219589133U - Indoor unit of air conditioner - Google Patents

Abstract

The utility model discloses an air conditioner indoor unit, which comprises: the device comprises a shell, an indoor heat exchanger, a fan assembly, at least one filter screen, at least one self-cleaning mechanism and a dust collecting box. The self-cleaning mechanism comprises a base, a first scroll, a second scroll and a cleaning brush, wherein the base comprises a base body and a base rear cover, a cleaning cavity is defined in the base body, the base rear cover is pivotally connected to the rear part of the base body, the first scroll, the second scroll and the cleaning brush are respectively and pivotally connected with the base body, the cleaning brush is located below the first scroll, the second scroll is located above the first scroll, and the base rear cover is located behind the first scroll and used for brushing sundries on a filter screen. Therefore, the cleaning of the impurities attached to the rear cover of the base is facilitated, the sealing performance of the first opening is improved, meanwhile, the winding shaft and the like inside the cleaning cavity can be conveniently installed and detached, the installation structure of the base is simplified, and the cost can be effectively reduced.

Description

Indoor unit of air conditioner

Technical Field

The utility model relates to the technical field of indoor units of air conditioners, in particular to an indoor unit of an air conditioner.

Background

The indoor unit of the air conditioner is provided with an air inlet and an air outlet, wherein a filter screen is arranged at the air inlet so as to filter the air entering the shell and prevent impurities such as dust and the like from entering the indoor unit of the air conditioner; after the air conditioner is used for a period of time, too much sundries are attached to the filter screen, so that part of filter holes on the filter screen are blocked, the air inlet quantity is reduced, and the refrigerating or heating efficiency of the air conditioner is influenced. At present, in order to keep the indoor unit of the air conditioner to operate efficiently, a sealing element is arranged in the indoor unit of the air conditioner, sundries attached to a filter screen are brushed into a collecting box by means of the sealing element and a first scroll stop, and the dust collecting box is cleaned regularly. However, the seal may affect the cleaning effect during cleaning due to accumulation of debris.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide an indoor unit of an air conditioner, which can increase the sealing performance of a cleaning chamber and the secondary cleaning of a filter screen.

According to an embodiment of the utility model, an indoor unit of an air conditioner comprises: the air conditioner comprises a shell, an indoor heat exchanger, a fan assembly, at least one filter screen, at least one self-cleaning mechanism and a dust collecting box, wherein an air inlet and an air outlet are formed in the shell; the filter screen is arranged between the air inlet and the indoor heat exchanger and is used for filtering sundries in indoor air, the self-cleaning mechanism is used for removing sundries on the filter screen and comprises a base, a first scroll, a second scroll and a cleaning brush, the base comprises a base body and a base rear cover, the base body is internally provided with a cleaning cavity with a first opening at the top and a second opening at the bottom, the base rear cover is pivotally connected to the rear part of the base body, the first scroll, the second scroll and the cleaning brush are respectively and pivotally connected with the base body, one end of the filter screen is connected with the first scroll, the other end of the filter screen is connected with the second scroll, the first scroll is positioned at the first opening, the base rear cover is positioned at the rear of the first scroll, and the cleaning brush is arranged in the cleaning cavity and is used for brushing sundries on the filter screen in the process of winding the first scroll or releasing the filter screen from the first scroll; the dust collection box is arranged at the second opening and is used for collecting sundries falling off from the cleaning brush.

According to the air conditioner indoor unit provided by the utility model, the base rear cover is arranged on the base, so that the base rear cover can rotate relative to the base body, the rear side of the cleaning cavity defined by the base can be opened and closed, after the self-cleaning mechanism works for a period of time, the interior of the cleaning cavity can be regularly maintained and cleaned, the cleaning of impurities attached to the base rear cover is facilitated, the base rear cover is enabled to be better abutted against the first scroll, the tightness of the first opening is improved, impurities in the cleaning cavity are prevented from entering the shell from the first opening to affect other components, the service life of the air conditioner indoor unit is prolonged, meanwhile, the scroll and the like in the cleaning cavity can be conveniently installed and detached, the installation structure of the base is simplified, and the cost can be effectively reduced.

In some embodiments, the base body includes two end caps spaced apart along a length direction of the housing, and pivot holes are formed in the two end caps, respectively; the base rear cover is provided with two pivot shafts which are respectively positioned at two ends of the base rear cover along the length direction of the shell, and the two pivot shafts are respectively and pivotally matched in the pivot holes of the two end covers.

In some embodiments, both of the pivot shafts are located at a lower portion of the base rear cover, and an upper portion of the base rear cover is rotatable about a central axis of the pivot hole.

In some embodiments, a mounting groove is formed on the base rear cover, a side of the mounting groove facing the first reel is open, and a sealing element is arranged in the mounting groove and used for sealing a gap between the base rear cover and the first reel.

In some embodiments, positioning holes are formed on the two end covers respectively; the upper portion of lid behind the base is equipped with two location protruding, two the location protruding is located respectively behind the base lid along the both ends of the length direction of casing, two the location protruding with two the locating hole of end cover detachably cooperates, two the location protruding cooperation is in two the locating hole of end cover the sealing member with first spool keeps stopping, two the location protruding with two the locating hole of end cover is separated the time the lid behind the base is suitable for around the central axis rotation of pivot hole makes the sealing member with first spool is spaced apart each other.

In some embodiments, the base rear cover is connected with a first extension portion and a second extension portion, the first extension portion is located above the second extension portion, the first extension portion and the second extension portion extend forward, the first extension portion, the second extension portion and the base rear cover jointly define the mounting groove, and the two positioning protrusions are respectively arranged at two ends of the first extension portion along the length direction of the shell.

In some embodiments, the front side of each positioning projection has a first guide slope extending obliquely from back to front in a direction away from the center of the base back cover; and/or the rear side of each positioning projection is provided with a second guiding inclined surface which extends obliquely from front to back in a direction toward the center of the base rear cover.

In some embodiments, a connecting member is connected between the two end caps, the connecting member is located at the rear of the cleaning brush, an upper portion of the connecting member is formed in a first arc-shaped structure protruding toward the center away from the cleaning brush, and the base rear cover is located above the connecting member.

In some embodiments, the front end of the second extension has a third extension that extends obliquely from back to front and downward; when the two positioning protrusions are matched in the positioning holes of the two end covers, the third extension part is abutted with the top of the connecting piece.

In some embodiments, at least one installation cavity is formed in the shell, the base and the dust collecting box are both arranged in the installation cavity, and the rear part of the inner wall of the installation cavity is provided with a second arc-shaped structure for avoiding the second scroll; the base rear cover is provided with a fourth extension part extending backwards, the shape of the fourth extension part is matched with that of the second arc-shaped structure, and when the two positioning protrusions are matched in the positioning holes of the two end covers, the fourth extension part is abutted to the second arc-shaped structure.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of a portion of an indoor unit casing of an air conditioner according to an embodiment of the present utility model.

FIG. 2 is a schematic view of a housing and self-cleaning mechanism according to an embodiment of the present utility model.

Fig. 3 is a perspective exploded schematic view of a self-cleaning mechanism according to an embodiment of the utility model.

Fig. 4 is a perspective exploded view of a base according to an embodiment of the present utility model.

Fig. 5 is an enlarged schematic view of the region P in fig. 4.

Fig. 6 is a schematic cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present utility model.

Fig. 7 is an enlarged schematic view of the Q region in fig. 6.

Fig. 8 is a partial schematic view of a drive mechanism according to an embodiment of the utility model.

Reference numerals:

100. an air conditioner indoor unit;

10. a housing; 11. An air inlet; 12. A second arc structure;

20. an indoor heat exchanger; 30. A fan assembly; 40. A filter screen;

50. a self-cleaning structure; 51. a base; 511. a base body; 512. a base rear cover; 5121. a pivot shaft; 5122. a mounting groove; 5123. positioning the bulge; 5124. a first guiding inclined surface; 513. cleaning the cavity; 514. a first extension; 515. a second extension; 516. a third extension; 517. a fourth extension; 52. a first reel; 53. a second reel; 54. a cleaning brush; 55. a dust collection box; 56. an end cap; 561. a pivot hole; 562. positioning holes; 57. a seal; 58. a connecting piece; 581. a first arcuate structure;

60. a driving mechanism; 61. a drive gear; 62. a first driven gear; 63. and a second driven gear.

Detailed Description

Embodiments of the present utility model will be described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary, and an air conditioner indoor unit 100 according to an embodiment of the present utility model will be described below with reference to fig. 1 to 8, the air conditioner indoor unit 100 including: the housing 10, the indoor heat exchanger 20, the fan assembly 30, the at least one filter screen 40, the at least one self-cleaning mechanism, the dust box 55.

Specifically, as shown in fig. 1 to 4, an air inlet 11 and an air outlet are formed on the casing 10, the indoor heat exchanger 20 is disposed in the casing 10 and is used for exchanging heat with indoor air entering from the air inlet 11, the fan assembly 30 is disposed on one side of the indoor heat exchanger 20 away from the air inlet 11, and under the action of the fan assembly 30, the indoor air can flow in from the air inlet 11 and exchange heat with the indoor heat exchanger 20 and then be sent out from the air outlet. The filter screen 40 is disposed between the air inlet 11 and the indoor heat exchanger 20, so that indoor air entering the indoor heat exchanger 20 can enter the indoor heat exchanger 20 after being filtered by the filter screen 40, and the filter screen 40 is used for filtering impurities in the indoor air, so as to prevent the impurities in the indoor air from accumulating on the surface of the indoor heat exchanger 20 to affect the heat exchange efficiency of the indoor heat exchanger 20. The self-cleaning mechanism is used to remove the foreign matters on the filter screen 40 so that the foreign matters deposited and adhered on the filter screen 40 can fall into the dust box 55. The self-cleaning mechanism comprises a base 51, a first scroll 52, a second scroll 53 and a cleaning brush 54, wherein the base 51 comprises a base body 511 and a base rear cover 512, a cleaning cavity 513 with a first opening at the top and a second opening at the bottom is defined in the base body 511, the first scroll 52 is arranged at the first opening, a dust collecting box 55 is arranged at the second opening, the base rear cover 512 is pivotably connected to the rear part of the base body 511, the first scroll 52, the second scroll 53 and the cleaning brush 54 are respectively and pivotably connected to the base body 511, the cleaning brush 54 is positioned below the first scroll 52, the second scroll 53 is positioned above the first scroll 52, one end of the filter screen 40 is connected to the first scroll 52, the other end of the filter screen 40 is connected to the second scroll 53, the base rear cover 512 is positioned behind the first scroll 52 and is used for removing sundries on the filter screen 40 during the process of winding or releasing the filter screen 40 on the first scroll 52 so as to form a secondary cleaning filter screen 40. The dust box 55 provided at the second opening is used to collect the foreign matters dropped on the cleaning brush 54 and the base rear cover 512. Here, the screen 40 is wound around the first reel 52 as an example. During the cleaning by the self-cleaning mechanism, the cleaning brush 54 is at least partially in contact with the filter screen 40 during the winding of the filter screen 40 around the first reel 52, and the cleaning brush 54 moves relative to the filter screen 40 as the filter screen 40 is wound and released, so that impurities adhering to the filter screen 40 can be brushed off.

For example, after the indoor unit 100 of the air conditioner is operated for a period of time, as indoor air continuously flows from the air inlet 11 to the indoor heat exchanger 20 under the action of the fan assembly 30, and is sent to the room from the air outlet by the fan assembly 30 after the indoor heat exchanger 20 exchanges heat, as impurities attached to the filter screen 40 opposite to the air inlet 11 in the indoor unit 100 of the air conditioner increase, when the impurities on the filter screen 40 reach a certain amount, a sensor provided in the casing 10 for detecting the amount of impurities attached to the filter screen 40 can transmit a signal to the controller to control the indoor unit 100 of the air conditioner to enter the self-cleaning mode when the impurities on the filter screen 40 reach a preset value. In the self-cleaning mode, the filter screen 40 moves relatively to the cleaning brush 54 under the action of the first rotating shaft and the second rotating shaft, and the cleaning brush 54 can be opposite to different areas of the filter screen 40 and can clean the area of the filter screen 40 opposite to the area. For example, when the first reel 52 and the second reel 53 rotate counterclockwise, the cleaning brush 54 included in the self-cleaning mechanism may abut against the first reel 52 to clean up the sundries on the filter screen 40 wound on the first reel 52, so that the sundries from the filter screen 40 fall into the dust box 55 to collect the sundries. And the dust box 55 is detachably connected with the base 51, so that the dust box 55 can be separated from the base 51 after sundries are collected when the sundries room in the dust box 55 needs to be cleaned, and the sundries in the dust box 55 can be cleaned conveniently. The base rear cover 512 is rotatable relative to the base body 511 to open and close the rear side of the cleaning chamber 513 defined by the base 51, so that the cleaning state of the interior of the cleaning chamber 513 can be conveniently observed from the rear side of the base body 511, meanwhile, as the base rear cover 512 has a cleaning effect on the filter screen 40 on the first reel 52, the cleaning effect is easy to be reduced after a long time of use, sundries deposited on one side, adjacent to the first reel 52, of the base rear cover 512 are not easy to automatically fall into the dust collecting box 55, and the cleaning or replacement of the base rear cover 512 is realized after the rotatable base rear cover 512 is opened, so that the cleaning efficiency of the self-cleaning mechanism is higher.

According to the indoor unit 100 of the air conditioner in the embodiment of the utility model, the base rear cover 512 is arranged on the base 51, so that the base rear cover 512 can rotate relative to the base body 511, the rear side of the cleaning cavity 513 defined by the base 51 can be opened and closed, after the self-cleaning mechanism works for a period of time, the interior of the cleaning cavity 513 can be maintained and cleaned regularly, the cleaning of impurities attached to the base rear cover 512 is facilitated, the base rear cover 512 is enabled to be better abutted against the first scroll 52, the tightness of the first opening is improved, impurities in the cleaning cavity 513 are prevented from entering the shell 10 from the first opening to affect other components, the service life of the indoor unit 100 of the air conditioner is prolonged, meanwhile, the scroll and the like in the cleaning cavity 513 can be conveniently installed and detached, the installation structure of the base 51 is simplified, and the cost can be effectively reduced.

In some embodiments, as shown in fig. 3 and 4, the base body 511 includes two end caps 56 spaced apart along the length direction of the housing 10, and pivot holes 561 are formed on the two end caps 56, respectively; the base rear cover 512 is provided with two pivot shafts 5121, the two pivot shafts 5121 are respectively located at two ends of the base rear cover 512 along the length direction of the housing 10, and the two pivot shafts 5121 are respectively and pivotably matched in the pivot holes 561 of the two end covers 56. That is, the pivotal connection between the base back cover 512 and the end cap 56, when it is desired to open the rear side of the clean out chamber 513, the base back cover 512 may be rotated, for example, clockwise about the central axis of the pivot hole 561 to open the rear side of the clean out chamber 513, and counterclockwise after cleaning the interior of the clean out chamber 513, to form a seal against the rear side of the clean out chamber 513. In addition, pivot holes 561 may be provided at both ends of the base rear cover 512 in the length direction of the housing 10, and pivot shafts 5121 may be provided on the end caps 56, and the pivot connection between the base rear cover 512 and the end caps 56 may be achieved as well, which is not particularly limited herein. Therefore, the pivot holes 561 are respectively provided on the end cover 56 provided at the end of the base body 511, and the pivot shaft 5121 is provided at the position of the end of the base rear cover 512 opposite to the pivot holes 561, so that the base rear cover 512 and the end cover 56 can be pivotally connected, the connection between the base rear cover 512 and the end cover 56 is achieved simply and reliably, and the rear side of the cleaning chamber 513 is conveniently opened to clean the side of the base rear cover 512 adjacent to the first reel 52, so that the cleaning effect of the filter screen 40 is better, and the sealing effect of the cleaning chamber 513 is better.

In some embodiments, as shown in fig. 4, both pivot shafts 5121 are located at a lower portion of the base rear cover 512, and an upper portion of the base rear cover 512 is rotatable about a central axis of the pivot hole 561. Therefore, the pivot shaft 5121 is disposed at the lower part of the base rear cover 512, so that the center of gravity of the base rear cover 512 mounted on the base body 511 can be reduced, the base rear cover 512 is convenient to mount, the rear side of the cleaning cavity 513 is opened by the base rear cover 512, the stability of the connection between the base rear cover 512 and the base body 511 is improved, and particularly when the sealing element 57 is disposed on the base rear cover 512, the cleaning or replacement of the sealing element 57 can be facilitated when the cleaning cavity 513 is opened, and the cleaning efficiency of the base rear cover 512 is improved.

Further, referring to fig. 4 and 5, a mounting groove 5122 is formed on the base rear cover 512, a side of the mounting groove 5122 facing the first reel 52 is opened, and a sealing member 57 is provided in the mounting groove 5122, the sealing member 57 being for sealing a gap between the base rear cover 512 and the first reel 52. That is, when the back cover 512 is connected to the base body 511, a mounting groove 5122 is formed on a side of the base body 511 facing the first reel 52, and a sealing member 57 is disposed in the mounting groove 5122, and the sealing member 57 is detachably connected to the mounting groove 5122. The rear side of the seal 57 is located in the mounting groove 5122, the front side of the seal 57 protrudes out of the mounting groove 5122 to stop against the first spool 52, and the center line of the seal 57 and the center axis of the first spool 52 are located in the same plane in the rear direction of the point of the housing 10. The seal 57 may be a polyurethane foam with high resiliency. Therefore, the mounting groove 5122 is formed on the base rear cover 512, the sealing element 57 is arranged in the mounting groove 5122, the sealing element 57 and the stop of the first scroll 52 can form a seal on the first opening of the cleaning cavity 513, so that dust in the cleaning cavity 513 is prevented from flowing to the fan assembly 30 or the indoor heat exchanger 20, and the service life of the indoor unit 100 of the air conditioner is prolonged. Meanwhile, the sealing piece 57 is in tangent contact with the first scroll 52, so that the filter screen 40 wound on the first scroll 52 can be secondarily cleaned, the filter effect of the filter screen 40 is better, and the filter capability of the self-cleaning assembly is improved.

In some embodiments, as shown in fig. 4, positioning holes 562 are formed on the two end caps 56, respectively, two positioning protrusions 5123 are provided on the upper portion of the base rear cover 512, the two positioning protrusions 5123 are located at both ends of the base rear cover 512 in the length direction of the housing 10, respectively, the two positioning protrusions 5123 are detachably engaged with the positioning holes 562 of the two end caps 56, the sealing member 57 is held against the first reel 52 when the two positioning protrusions 5123 are engaged in the positioning holes 562 of the two end caps 56, and the base rear cover 512 is adapted to rotate about the central axis of the pivot hole 561 to space the sealing member 57 and the first reel 52 from each other when the two positioning protrusions 5123 are separated from the positioning holes 562 of the two end caps 56. The positioning holes 562 may be rectangular or circular in shape. The positioning hole 562 may be formed at the end of the base rear cover 512 along the length direction of the housing 10, and the positioning protrusion 5123 may be formed at a side of the end cover 56 adjacent to the cleaning chamber 513. The rear cover 512 of the base can be separated from the end cover 56 under the action of external force, and the cross-sectional area of the positioning hole 562 is larger than that of the positioning protrusion 5123 along the length direction of the housing 10, so that the positioning protrusion 5123 can be matched with the positioning hole 562 more conveniently. From this, set up locating hole 562 on end cover 56, set up location arch 5123 on lid 512 behind the base, realize being connected through locating hole 562 and location arch 5123 cooperation between lid 512 behind the base and the end cover 56, the mode of detachable connection is simple, and is convenient for lid 512 behind the base open the rear side of cleaning chamber 513, is convenient for clean and change to sealing member 57.

In some embodiments, as shown in fig. 4-7, the base rear cover 512 is connected with a first extension portion 514 and a second extension portion 515, the first extension portion 514 is located above the second extension portion 515, the first extension portion 514 and the second extension portion 515 extend forward, the first extension portion 514, the second extension portion 515 and the base rear cover 512 together define a mounting groove 5122, and two positioning protrusions 5123 are respectively disposed at two ends of the first extension portion 514 along the length direction of the housing 10. That is, a first extending portion 514 and a second extending portion 515 are provided on a side of the base rear cover 512 adjacent to the first reel 52, the first extending portion 514 and the second extending portion 515 extend along a length direction of the housing 10, the sealing member 57 is provided between the first extending portion 514 and the second extending portion 515, wherein a positioning protrusion 5123 for detachably connecting the base rear cover 512 and the end cover 56 is provided at an end portion of the first extending portion 514, the pivot shaft 5121 is provided on a side of the second extending portion 515 remote from the first extending portion 514, and the first extending portion 514, the second extending portion 515 and the base rear cover 512 are distributed in a C-shape so as to form a mounting groove 5122. The first extension 514, the second extension 515, and the base rear cover 512 may be manufactured by integral molding. Thus, by providing the first and second extending portions 514 and 515 at the front side of the base rear cover 512 such that the first and second extending portions 514 and 515 and the base rear cover 512 define the mounting groove 5122 in which the sealing member 57 is mounted, the structure of the base 51 can be simplified while the mounting of the sealing member 57 is facilitated, and the reliability of the mounting of the sealing member 57 can be increased.

In some embodiments, referring to fig. 5, the front side of each positioning protrusion 5123 has a first guide slope 5124, and the first guide slope 5124 extends obliquely from front to back in a direction toward a center away from the base rear cover 512. That is, the side of the positioning protrusion 5123 adjacent to the cleaning chamber 513 is formed as a first guiding inclined surface 5124, the first guiding inclined surface 5124 gradually extends from the rear to the front towards the direction away from the center of the base rear cover 512, and when the positioning protrusion 5123 is matched with the positioning hole 562, the first guiding inclined surface 5124 helps the base rear cover 512 to be matched with the end cover 56, so that the difficulty in connecting the base rear cover 512 with the end cover 56 is reduced, the base rear cover 512 and the end cover 56 are assembled more conveniently, and the positioning protrusion 5123 is limited by the positioning hole 562, so that the base rear cover 512 is mounted. Alternatively, the rear side of each of the positioning projections 5123 has a second guide slope (not shown) extending obliquely from front to rear in a direction toward the center of the base rear cover 512. That is, the side of the positioning projection 5123 away from the cleaning chamber 513 is formed as a second guiding slope which extends gradually from the rear to the front toward the direction away from the center of the base rear cover 512, and when the positioning projection 5123 is engaged with the positioning hole 562, the second guiding slope is stopped against the rear side wall of the positioning hole 562, and the positioning hole 562 is engaged with the positioning projection 5123. Therefore, whether the first guide inclined surface 5124 or the second guide inclined surface is arranged on the positioning protrusion 5123, the difficulty in assembling the base rear cover 512 and the end cover 56 can be reduced, and the assembling stability can be improved.

In some alternative embodiments, the positioning protrusion 5123 may be provided with a first guiding inclined plane 5124 and a second guiding inclined plane at the same time, in the process of assembling the positioning protrusion 5123 and the positioning hole 562, the first guiding inclined plane 5124 is abutted against the rear of the end cover 56, the end cover 56 realizes the cooperation of the positioning protrusion 5123 and the positioning hole 562 by overcoming a certain elastic deformation, the first guiding inclined plane 5124 forms a guiding action, so that the positioning protrusion 5123 is easier to cooperate with the positioning hole 562, and the second guiding inclined plane can be abutted against the rear side wall of the positioning hole 562 after the positioning protrusion 5123 cooperates with the positioning hole 562, so as to form a limiting action, and avoid the positioning protrusion 5123 from being separated from the positioning hole 562.

In some embodiments, as shown in fig. 4 and 7, a connection member 58 is connected between the two end caps 56, the connection member 58 is located at the rear of the cleaning brush 54, an upper portion of the connection member 58 is formed as a first arc-shaped structure 581 protruding toward the center away from the cleaning brush 54, and the base rear cover 512 is located above the connection member 58. That is, the upper end of the connecting member 58 is configured as a first arc structure 581, the first arc structure 581 is gradually bent toward the cleaning brush 54 from bottom to top, the base rear cover 512 is disposed above the connecting member 58, and the first arc structure 581 can form a avoidance for the base rear cover 512 and facilitate the base rear cover 512 to abut against the first arc structure 581 at the upper end of the first arc structure 581. And the curved configuration of the gradual curvature toward cleaning brush 54 may reduce the distance between attachment 58 and cleaning brush 54, while facilitating dust to fall into cleaning brush 54, reducing the volume of cleaning chamber 513. Therefore, the connecting piece 58 is arranged between the end covers 56, so that the structural strength of the base 51 can be conveniently increased, the cleaning cavity 513 is conveniently formed to limit dust generated in the working process of the cleaning brush 54, the distance of dust movement is reduced, and the speed of sundries attached to the connecting piece 58 falling into the dust collecting box 55 is accelerated.

In some embodiments, as shown in fig. 4 and 7, the front end of the second extension 515 has a third extension 516, the third extension 516 extending obliquely from back to front and downward, and the third extension 516 is stopped against the top of the connecting piece 58 when the two positioning protrusions 5123 are fitted into the positioning holes 562 of the two end caps 56. A third extension portion 516 is provided at a front side of the second extension portion 515, the third extension portion 516 extends along a length direction of the housing 10, a rear side of the third extension portion 516 is connected to a front side of the second extension portion 515, the front side of the third extension portion 516 gradually extends obliquely from top to bottom toward the first reel 52, and a pivot shaft 5121 is provided behind the third extension portion 516. When the base rear cover 512 is connected with the base body 511 and the positioning hole 562 is engaged with the positioning boss 5123, the upper end of the connecting member 58 abuts against the rear side of the third extension 516, and the upper end of the connecting member 58 is located between the third extension 516 and the pivot shaft 5121. Therefore, the third extension portion 516 forms a limit for the base rear cover 512 when the base rear cover 512 is assembled with the base body 511, so that the base rear cover 512 can be quickly installed in place, the situation that the rotating speed of the first reel 52 is affected by excessive contact between the sealing element 57 installed on the base rear cover 512 and the first reel 52 is avoided, and the service life of the sealing element 57 is reduced.

Referring to fig. 1 to 8, at least one installation cavity is formed in the housing 10, the base 51 and the dust collecting box 55 are both disposed in the installation cavity, the rear portion of the inner wall of the installation cavity is provided with a second arc-shaped structure 12 for avoiding the second reel 53, the second arc-shaped structure 12 is disposed at the rear of the second reel 53, the base rear cover 512 is provided with a fourth extending portion 517 extending backwards, one end of the fourth extending portion 517 is connected with the rear end of the first extending portion 514, the other end of the fourth extending portion 517 extends obliquely from front to rear gradually towards the second reel 53, the shape of the fourth extending portion 517 is adapted to the shape of the second arc-shaped structure 12, and when the two positioning protrusions 5123 are matched in the positioning holes 562 of the two end covers 56, the rear side of the fourth extending portion 517 is abutted against one side of the second arc-shaped structure 12 adjacent to the second reel 53. When the seal 57 needs to be replaced, the fourth extension 517 rotates clockwise about the central axis of the pivot hole 561 after the housing 10 is removed, so that the seal 57 provided on the base rear cover 512 is flipped out for replacement. Thus, the fourth extension 517 is disposed on the base rear cover 512, so that the base rear cover 512 can be stopped by the housing 10 after being assembled with the end cover 56, the housing 10 can form a stop for the base rear cover 512, so that the base rear cover 512 is kept tangential to the first scroll 52, a seal for a gap between the first scroll 52 and the base rear cover 512 is formed, and dust in the cleaning cavity 513 is prevented from flowing from the gap between the first scroll 52 and the base rear cover 512 to the second scroll 53 or to other components of the indoor unit 100, thereby affecting the normal use of the indoor unit 100.

In some embodiments, as shown in fig. 8, the indoor unit 100 of the air conditioner further includes a driving mechanism 60, where the driving mechanism 60 may be a driving motor, a power output end of the driving motor is provided with a driving gear 61, and the driving mechanism 60 drives the first scroll 52, the second scroll 53, and the like to rotate through a transmission mechanism. The transmission mechanism includes a first driven gear 62 and a second driven gear 63, the first driven gear 62 is mounted at one end of the first reel 52, the first driven gear 62 is engaged with the driving gear 61, the second driven gear 63 is mounted at one end of the second reel 53, and the second driven gear 63 is engaged with the first driven gear 62. In this embodiment, during the operation of the self-cleaning mechanism, the driving motor operates, and the driving gear 61 on the power output end drives the first driven gear 62 to rotate, so as to drive the first reel 52 to rotate, and at the same time, the first driven gear 62 also drives the second driven gear 63 meshed with the first driven gear 62 to rotate, so as to drive the second reel 53 to rotate. Thereby, under the action of the first reel 52 and the second reel 53, the filter screen 40 tensioned between the first reel 52 and the second reel 53 moves along a predetermined trajectory, so that different areas on the filter screen 40 are sequentially opposed to the self-cleaning mechanism, and the filter screen 40 of the different areas is cleaned by the self-cleaning mechanism. Optionally, the number of teeth of the first driven gear 62 and the second driven gear 63 are consistent, so as to ensure that the rotation speeds of the first reel 52 and the second reel 53 are consistent, and the filter screen 40 is always tensioned on the first reel 52 and the second reel 53.

Specifically, the driving mechanism 60 drives the first reel 52 and the second reel 53 to rotate through the driving gear 61, so as to drive the filter screen 40 to move between the first reel 52 and the second reel 53, so that the filter screen 40 and the cleaning brush 54 abutted against the filter screen 40 move relatively, the cleaning brush 54 cleans the residual or attached sundries and flocks on the filter screen 40, so that the cleaned flocks fall into the dust collecting box 55, and the dust collecting box 55 can be detached and cleaned manually when the sundries in the dust collecting box 55 reach a certain amount. When the foreign matter on the screen 40 is below a certain amount, the sensor may transmit a signal to the controller to control the air conditioner indoor unit 100 to stop the self-cleaning mode.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features. In the description of the present utility model, "plurality" means two or more. In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween. In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An indoor unit of an air conditioner, comprising:

the shell is provided with an air inlet and an air outlet;

the indoor heat exchanger is arranged in the shell and is used for exchanging heat with indoor air entering from the air inlet;

the fan assembly is arranged on one side, far away from the air inlet, of the indoor heat exchanger and is used for enabling indoor air to flow in from the air inlet and flow out from the air outlet after exchanging heat with the indoor heat exchanger;

the filter screen is arranged between the air inlet and the indoor heat exchanger and is used for filtering sundries in indoor air;

at least one self-cleaning mechanism for removing impurities on the filter screen, the self-cleaning mechanism comprises a base, a first scroll, a second scroll and a cleaning brush, the base comprises a base body and a base rear cover, a cleaning cavity with a first opening at the top and a second opening at the bottom is defined in the base body, the base rear cover is pivotably connected to the rear part of the base body, the first scroll, the second scroll and the cleaning brush are pivotably connected with the base body respectively, one end of the filter screen is connected with the first scroll, the other end of the filter screen is connected with the second scroll, the first scroll is positioned at the first opening, the base rear cover is positioned behind the first scroll, and the cleaning brush is arranged in the cleaning cavity and is used for brushing impurities on the filter screen during the process of winding the filter screen on or releasing the first scroll;

the dust collecting box is arranged at the second opening and is used for collecting sundries falling off from the cleaning brush.

2. The indoor unit of claim 1, wherein the base body includes two end caps spaced apart along a length direction of the housing, and pivot holes are formed in the two end caps, respectively;

the base rear cover is provided with two pivot shafts which are respectively positioned at two ends of the base rear cover along the length direction of the shell, and the two pivot shafts are respectively and pivotally matched in the pivot holes of the two end covers.

3. An indoor unit for an air conditioner according to claim 2, wherein both of the pivot shafts are located at a lower portion of the base rear cover, and an upper portion of the base rear cover is rotatable about a central axis of the pivot hole.

4. The indoor unit of claim 3, wherein the base rear cover is formed with a mounting groove, a side of the mounting groove facing the first reel is opened, and a sealing member for sealing a gap between the base rear cover and the first reel is provided in the mounting groove.

5. The indoor unit of claim 4, wherein the two end covers are respectively formed with positioning holes;

the upper portion of lid behind the base is equipped with two location protruding, two the location protruding is located respectively behind the base lid along the both ends of the length direction of casing, two the location protruding with two the locating hole of end cover detachably cooperates, two the location protruding cooperation is in two the locating hole of end cover the sealing member with first spool keeps stopping, two the location protruding with two the locating hole of end cover is separated the time the lid behind the base is suitable for around the central axis rotation of pivot hole makes the sealing member with first spool is spaced apart each other.

6. The indoor unit of claim 5, wherein the base rear cover is connected with a first extension portion and a second extension portion, the first extension portion is located above the second extension portion, the first extension portion and the second extension portion extend forward, the first extension portion, the second extension portion and the base rear cover together define the mounting groove, and the two positioning protrusions are respectively disposed at two ends of the first extension portion along the length direction of the housing.

7. The indoor unit of claim 6, wherein a front side of each of the positioning bosses has a first guide slope extending obliquely from rear to front in a direction away from a center of the base rear cover; and/or

The rear side of each positioning projection has a second guide slope extending obliquely from front to back in a direction toward the center of the base rear cover.

8. The indoor unit of claim 6, wherein a connection member is connected between the two end caps, the connection member is located at the rear of the cleaning brush, an upper portion of the connection member is formed in a first arc-shaped structure protruding toward a center away from the cleaning brush, and the base rear cover is located above the connection member.

9. The indoor unit of claim 8, wherein a front end of the second extension has a third extension extending obliquely from rear to front and downward;

when the two positioning protrusions are matched in the positioning holes of the two end covers, the third extension part is abutted with the top of the connecting piece.

10. The indoor unit of any one of claims 5-9, wherein at least one installation cavity is formed in the housing, the base and the dust box are both disposed in the installation cavity, and a second arc structure for avoiding the second reel is formed at a rear portion of an inner wall of the installation cavity;

a fourth extension part extending backwards is arranged on the back cover of the base, the shape of the fourth extension part is matched with the shape of the second arc-shaped structure,

when the two positioning protrusions are matched in the positioning holes of the two end covers, the fourth extension part is abutted against the second arc-shaped structure.