Air conditioner indoor unit and air conditioner

By designing a detachable air intake grille and filter structure, the problem of cleaning the air intake grille of the indoor unit of the air conditioner is solved, enabling convenient disassembly and cleaning, and improving the air intake volume and filtration effect of the air conditioner.

CN223924941UActive Publication Date: 2026-02-17QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +1
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Patent Information

Application Number
CN202520357925.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-03
Publication Date
2026-02-17
Estimated Expiration
2035-03-03

AI Technical Summary

Technical Problem

The air intake grille of the indoor unit of existing air conditioners is difficult to disassemble and clean, resulting in dust accumulation that affects the air intake and filtration effect.

Method used

Design a detachable air intake grille and filter structure. The air intake grille can be moved laterally to the installation or removal position. It is prevented from moving upward by a stop and fixed by hooks and holes. A knob changes the fixing state of the stop, which facilitates disassembly and installation.

Benefits of technology

It enables easy disassembly and cleaning of the air intake grille and filter, improving the air intake volume and filtration effect of the air conditioner and extending its service life.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an air conditioner indoor unit and an air conditioner. The air conditioner indoor unit comprises a machine shell, an air inlet grille, a filter screen and a stop piece. An air inlet is formed in the surface of the machine shell in the longitudinal direction. The air inlet grille is detachably arranged at the air inlet and is provided with a mounting position which is fixed in the transverse direction relative to the machine shell and a dismounting position which can move in the transverse direction relative to the machine shell; the air inlet grille is configured to be capable of moving upwards from the mounting position to the dismounting position or moving downwards from the dismounting position to the mounting position. The filter screen is detachably arranged on the inner side of the air inlet grille. The stop piece is detachably arranged above the air inlet, abuts against the top end of the air inlet grille and is used for preventing the air inlet grille from moving upwards from the installation position. According to the indoor unit of the air conditioner, the detachable air inlet grille mixed filter screen is fixed through the detachable stop piece, so that the problem that the air inlet grille is difficult to detach and clean is solved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the field of household electrical appliances, in particular to an indoor unit of an air conditioner and the air conditioner. BACKGROUND

[0002] The air inlet of the indoor unit of the household cabinet type air conditioner is usually arranged at the side of the casing, and a filter screen is arranged at the air inlet of the indoor unit of the air conditioner in order to filter dust and impurities in the air sucked into the air inlet. However, dust accumulated on the filter screen will block the air inlet after the indoor unit of the air conditioner is used for a period of time, resulting in a decrease in the air inlet amount of the indoor unit of the air conditioner and a loss of the dust filtering function, and therefore the filter screen is usually designed to be detachable so as to be cleaned by the user.

[0003] The existing indoor unit of the air conditioner is usually designed with an air inlet grille integrated with the casing at the air inlet, and the filter screen is installed at the rear side of the air inlet grille in a pulling manner through an opening at the side of the air inlet grille. However, the surface of the air inlet grille located at the outer side of the filter screen is also easy to accumulate dust, and the design has the problem that the air inlet grille cannot be detached, and the user cannot clean the air inlet grille. SUMMARY

[0004] An aspect of the utility model is to provide an indoor unit of an air conditioner in which the filter screen and the air inlet grille are both detachable, so as to solve the problem that the air inlet grille is difficult to detach and clean.

[0005] Another aspect of the utility model is to provide an air conditioner which solves the above problem.

[0006] According to an aspect of the utility model, the utility model provides an indoor unit of an air conditioner, which comprises a casing, an air inlet grille, a filter screen and a stopper.

[0007] A surface of the casing is provided with an air inlet in the longitudinal direction.

[0008] The air inlet grille is detachably arranged at the air inlet and has a mounting position fixed in the transverse direction relative to the casing and a detaching position capable of moving in the transverse direction relative to the casing; the air inlet grille is configured to move upward from the mounting position to the detaching position or move downward from the detaching position to the mounting position.

[0009] The filter screen is detachably arranged at the inner side of the air inlet grille.

[0010] The stopper is detachably arranged above the air inlet and abuts against the top end of the air inlet grille, and is used for preventing the air inlet grille from moving upward from the mounting position.

[0011] Optionally, a fixed frame is formed at the circumferential side of the air inlet of the casing, and the fixed frame is located at the inner side of the air inlet grille.

[0012] The inner surface of the air inlet grille is formed with a plurality of downward extending hooks, and the fixed frame is formed with a hook hole corresponding to each hook; each hook is configured to extend into a hook hole when the air inlet grille is in a disassembled position, and to be laterally clamped and fixed with the lower side of the hook hole when the air inlet grille is moved downward to an installed position.

[0013] Optionally, the inner side of the air inlet grille is formed with a recessed cavity, and a buckle is protruded on the side wall of the recessed cavity to detachably fix the filter screen in the recessed cavity.

[0014] Optionally, the air conditioner indoor unit further comprises a fixing member.

[0015] The fixing member is arranged on the casing above the air inlet, and is configured to change the fixing state of the stopper.

[0016] Optionally, the fixing member is a knob, which is rotatably arranged on the casing and is configured to change the fixing state of the stopper by rotation.

[0017] Optionally, the stopper is provided with a through hole in the shape of a circle, and a through groove located at the side of the through hole and communicating with the through hole.

[0018] The knob comprises a base, a connecting shaft and a lock.

[0019] The base is rotatably arranged on the casing.

[0020] The connecting shaft extends outwardly from the base and passes through the through hole, and rotates coaxially with the base.

[0021] The lock is arranged at the end of the connecting shaft and extends laterally to the connecting shaft; the shape of the lock protruding from the lateral part of the connecting shaft corresponds to the shape of the through groove, so that the lock can pass through the stopper or be clamped to the side of the through hole.

[0022] Optionally, the stopper has a baffle extending laterally outwardly.

[0023] Optionally, the stopper defines an accommodating cavity with an opening upwardly; the baffle is the bottom wall of the accommodating cavity.

[0024] Optionally, the side wall of the stopper is further formed with a sliding rail, and the casing is formed with a sliding groove corresponding to the sliding rail; the sliding rail and the sliding groove are matched to limit the lateral movement of the stopper relative to the casing.

[0025] According to another aspect of the present application, the present application further provides an air conditioner, which comprises the air conditioner indoor unit.

[0026] The indoor unit of the air conditioner comprises a casing, an air inlet grille, a filter screen and a stopper. The casing is provided with an air inlet in the longitudinal direction. The air inlet grille is detachably arranged at the air inlet and has a fixed mounting position in the transverse direction relative to the casing and a dismounting position capable of moving in the transverse direction relative to the casing; the air inlet grille is configured to move upward from the mounting position to the dismounting position or move downward from the dismounting position to the mounting position. The filter screen is detachably arranged at the inner side of the air inlet grille. The stopper is detachably arranged above the air inlet and abuts against the top end of the air inlet grille to prevent the air inlet grille from moving upward from the mounting position. The indoor unit of the air conditioner of the utility model utilizes the detachable stopper to fix the detachable air inlet grille and the filter screen, so as to solve the problem that the air inlet grille is difficult to dismount and clean.

[0027] The above and other objects, advantages and features of the present utility model will become more apparent from the following detailed description of some embodiments thereof, when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] Some specific embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings in an exemplary and non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:

[0029] Figure 1 is a schematic diagram of the indoor unit of the air conditioner according to one embodiment of the present utility model;

[0030] Figure 2 is Figure 1 a schematic exploded view of the indoor unit of the air conditioner shown in Fig. 1;

[0031] Figure 3 is Figure 1 a schematic diagram of the air inlet grille and the filter screen of the indoor unit of the air conditioner shown in Fig. 1;

[0032] Figure 4 is Figure 1 a partial sectional schematic diagram of the indoor unit of the air conditioner shown in Fig. 1 with the air inlet grille in the mounting position;

[0033] Figure 5 is Figure 1 a partial sectional schematic diagram of the indoor unit of the air conditioner shown in Fig. 1 with the air inlet grille in the dismounting position;

[0034] Figure 6 is Figure 2 a partial enlarged schematic diagram of part A in Fig. 1;

[0035] Figure 7 is a schematic diagram of the air conditioner according to one embodiment of the present utility model. DETAILED DESCRIPTION

[0036] In the description of the present embodiment, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise", and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] The terms "first", "second", and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include at least one of the features, that is, one or more of the features.

[0038] In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, and the like, unless otherwise specifically limited. When a certain feature "includes or contains" a certain or certain features it encompasses, unless otherwise specifically described, it indicates that other features are not excluded and can further include other features.

[0039] Unless otherwise specifically defined and limited, the terms "mount", "connect", "connect", "fix", "couple" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. Those skilled in the art should be able to understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0040] In addition, in the description of the present application, the first feature "above" or "below" the second feature can include direct contact between the first and second features, or can include indirect contact between the first and second features through another feature therebetween.

[0041] That is, in the description of the present application, the first feature "above", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" or "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] In the description of the present utility model, the description of the reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, devices, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, devices, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] Unless otherwise defined, all terms (including technical and scientific terms) used in the description of the embodiments of the present utility model have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0044] Figure 1 is a schematic diagram of an air conditioner indoor unit 20 according to one embodiment of the present utility model; Figure 2 is Figure 1 is a schematic exploded view of the air conditioner indoor unit 20 shown; Figure 3 is Figure 1 is a schematic diagram of the air inlet grille 22 and the filter screen 23 of the air conditioner indoor unit 20 shown; Figure 4 is Figure 1 is a partial cross-sectional schematic diagram of the air conditioner indoor unit 20 with the air inlet grille 22 in the installed position; Figure 5 is Figure 1 is a partial cross-sectional schematic diagram of the air conditioner indoor unit 20 with the air inlet grille 22 in the disassembled position.

[0045] With reference to Figure 1 and Figure 2 shown, the present embodiment provides an air conditioner indoor unit 20, which comprises a casing 21, an air inlet grille 22, a filter screen 23 and a stopper 24. The surface of the casing 21 is provided with an air inlet 21A in the longitudinal direction. The air inlet grille 22 is detachably arranged at the air inlet 21A and has an installed position fixed in the transverse direction relative to the casing 21 and a disassembled position capable of moving in the transverse direction relative to the casing 21; the air inlet grille 22 is configured to be capable of moving upward from the installed position to the disassembled position, or moving downward from the disassembled position to the installed position. The filter screen 23 is detachably arranged on the inner side of the air inlet grille 22. The stopper 24 is detachably arranged above the air inlet 21A and abuts against the top end of the air inlet grille 22, for preventing the air inlet grille 22 from moving upward from the installed position.

[0046] Figure 4 and Figure 5The images illustrate the installation and removal positions of the air intake grille 22. The air intake grille 22 can move vertically between the installation and removal positions. Figure 4 When installed in the position shown, the air intake grille 22 is horizontally fixed relative to the housing 21 and cannot be detached. When the air intake grille 22 is in the position shown... Figure 5 When in the disassembly position shown, the air intake grille 22 can be moved laterally relative to the housing 21 and removed outwards.

[0047] It should be noted that in this embodiment, the longitudinal opening of the air inlet 21A on the surface of the housing 21 does not limit the shape of the air inlet 21A, or in other words, it does not limit the longitudinal length of the air inlet 21A to be greater than its transverse width. In this embodiment, the longitudinal opening of the air inlet 21A on the surface of the housing 21 means that the air inlet 21A is opened on a longitudinally extending surface of the housing 21, and it can be understood that this does not limit the surface of the housing 21 to extend vertically downward, but can have a certain inclination relative to the direction of gravity.

[0048] In some alternative embodiments, in order to detachably fix the air intake grille 22 to the air intake 21A, refer to Figure 4 and Figure 5 As shown, a fixing frame 211 is formed around the air inlet 21A on the housing 21, and the fixing frame 211 is located inside the air inlet grille 22. A plurality of downwardly extending hooks 221 are formed on the inner surface of the air inlet grille 22, and a corresponding locking hole is formed on the fixing frame 211; each hook 221 is configured to extend into a locking hole when the air inlet grille 22 is in the disassembled position, and to engage and fix it laterally with the lower side of the locking hole when the air inlet grille 22 is moved downward to the installation position.

[0049] It is understood that the air intake grille 22 is not limited to being fixed at the air inlet 21A in one of the above embodiments. For example, in some alternative embodiments, the housing 21 may be recessed downward below the air inlet 21A to form a cavity. The air intake grille 22 can switch between the installation position and the removal position by moving downward and extending its lower end into the cavity or moving upward to disengage from the cavity. The outer wall of the cavity can prevent the air intake grille 22 from moving laterally.

[0050] In this embodiment, the filter 23 is detachably disposed inside the air inlet grille 22. The filter 23 can be detachably fixed to the inside of the air inlet grille 22 or to the housing 21 at the air inlet 21A, or it can be clamped and fixed between the air inlet grille 22 and the fixed frame 211. For example... Figure 3 As shown, in some alternative embodiments, a cavity is formed on the inner side of the air intake grille 22, and a buckle 222 protrudes from the sidewall of the cavity to detachably fix the filter screen 23 in the cavity.

[0051] The embodiment can enable the user to remove the filter screen 23 together with the air inlet grille 22, thereby improving the convenience of disassembling the air inlet grille 22 and the filter screen 23.

[0052] Since the air inlet 21A of the cabinet-type air conditioner indoor unit 20 is usually long, in order to facilitate the cleaning of the filter screen 23, in some alternative embodiments, the number of filter screens 23 on one air inlet grille 22 can be multiple, and the multiple filter screens 23 are arranged in the longitudinal direction.

[0053] It should be noted that the inner side and the outer side in the embodiment are consistent with the inner side and the outer side of the cabinet 21, that is, the inner side in the embodiment faces the inner side of the cabinet 21, and the outer side faces the outer side of the cabinet 21.

[0054] In order to prevent the air inlet grille 22 from moving upward from the mounting position, the air conditioner indoor unit 20 of the embodiment is further provided with a stopper 24. Referring to Figure 4 , the stopper 24 is detachably arranged above the air inlet 21A and abuts against the top end of the air inlet grille 22.

[0055] When the stopper 24 is fixed on the cabinet 21, the air inlet grille 22 cannot move upward from the mounting position because the top end of the air inlet grille 22 abuts against the stopper 24, thereby avoiding the air inlet grille 22 from being accidentally detached. When the user needs to disassemble and clean the air inlet grille 22 and the filter screen 23, the stopper 24 needs to be disassembled first, and after the air inlet grille 22 is not prevented from moving upward by the stopper 24, the air inlet grille 22 can be moved from the mounting position to the disassembled position and taken out for disassembly.

[0056] Figure 6 is Figure 2 a partial enlarged view of part A.

[0057] In order to be able to more conveniently disassemble and fix the stopper 24, in some alternative embodiments, referring to Figure 6 , the air conditioner indoor unit 20 further comprises a fixing member 25. The fixing member 25 is arranged on the cabinet 21 above the air inlet 21A and is configured to change the fixing state of the stopper 24.

[0058] The fixing state of the stopper 24 refers to two states that the stopper 24 is fixed relative to the cabinet 21 and is detachable relative to the cabinet 21. In some alternative embodiments, the fixing member 25 is a knob 25, and the knob 25 is rotatably arranged on the cabinet 21 and is configured to change the fixing state of the stopper 24 by rotating.

[0059] Further, in some alternative embodiments, referring to Figure 6As shown, the stopper 24 is provided with a circular through hole 24A and a through groove 24B which is located at the side of the through hole 24A and communicates with the through hole 24A. The knob 25 comprises a base (not shown in the figure), a connecting shaft 251 and a lock 252. The base is rotatably arranged on the casing 21 and is generally located inside the casing 21. The connecting shaft 251 extends outwardly from the base and passes through the through hole 24A of the stopper 24 and rotates coaxially with the base. The lock 252 is arranged at the end of the connecting shaft 251 and extends to the side of the connecting shaft 251, i.e. in the diameter direction; the shape of the lock 252 which protrudes from the side of the connecting shaft 251 corresponds to the shape of the through groove 24B, so that the lock 252 can pass through the stopper 24 or be clamped to the side of the through hole 24A.

[0060] In the embodiment, the through hole 24A and the through groove 24B of the stopper 24 together form a special-shaped opening; by rotating the knob 25 and aligning the lock 252 of the knob 25 with the through groove 24B, the front end of the knob 25 can pass through the stopper 24, and then by rotating the knob 25 to the state that the lock 252 of the knob 25 is not aligned with the through groove 24B, the lock 252 can be clamped to the edge of the through hole 24A, so as to fix the stopper 24 on the casing 21.

[0061] In the embodiment, the base of the knob 25 is used to cooperate with the casing 21 in shape and prevent the knob 25 from moving transversely relative to the casing 21, and the shape of the base can be disc-shaped or other shapes, which are not limited herein.

[0062] In order to avoid the position of the knob 25 affecting the movement of the air inlet grille 22, the distance between the knob 25 and the air inlet grille 22 which is in the fixed position should be greater than the distance that the air inlet grille 22 moves between the fixed position and the moving position.

[0063] In some alternative embodiments, the knob 25 can also have other shapes, for example, can be drop-shaped or other shapes in which the distance between part of the edge and the rotation axis is obviously increased, and can be arranged at the edge of the stopper 24, and the fixing state of the stopper 24 can be changed by rotating to be clamped to the edge of the stopper 24 or to be disengaged from the clamping.

[0064] In some alternative embodiments, the stopper 24 has a baffle which extends outwardly in the transverse direction. Considering that when the air conditioner indoor unit 20 is not working, dust in the ambient air can fall to the air inlet 21A in a natural sedimentation manner and pollute the air inlet grille 22 and the filter screen 23, in order to reduce the pollution caused by this situation to the air inlet grille 22 and the filter screen 23, the stopper 24 of the embodiment not only prevents the movement of the air inlet grille 22, but also blocks the dust from above the air inlet 21A by forming the baffle which extends outwardly in the transverse direction.

[0065] Further, in some alternative embodiments, with reference toFigure 6 As shown, the stopper 24 defines an upwardly open accommodating cavity; the baffle is the bottom wall of the accommodating cavity.

[0066] The stopper 24 of the embodiment further forms an upwardly open accommodating cavity while having a baffle for shielding dust. The accommodating cavity is designed to provide a storage space for the remote controller of the air conditioner indoor unit 20, so as to avoid the user forgetting the storage position of the remote controller after a long time of not using the air conditioner indoor unit 20. Since the stopper 24 is usually located at the side of the cabinet 21, the user can easily see the remote controller when it is placed at this position and needs to use the air conditioner indoor unit 20.

[0067] In some alternative embodiments, the side wall of the stopper 24 is further formed with a sliding rail 241, and the cabinet 21 is formed with a sliding groove 21B corresponding to the sliding rail 241; the sliding rail 241 and the sliding groove 21B are engaged to limit the transverse movement of the stopper 24 relative to the cabinet 21.

[0068] Reference Figure 6 As shown, the stopper 24 of the embodiment is further formed with a sliding rail 241, and the cabinet 21 is formed with a sliding groove 21B corresponding to the sliding rail 241, so as to limit the transverse movement of the stopper 24 relative to the cabinet 21 and prevent the movement of the stopper 24 in other directions, thereby enabling the stopper 24 to be more firmly fixed on the cabinet 21.

[0069] Figure 7 is a schematic view of an air conditioner 10 according to an embodiment of the present application.

[0070] Reference Figure 7 As shown, the embodiment further provides an air conditioner 10. The air conditioner 10 comprises the indoor unit 20 of any of the above embodiments.

[0071] The air conditioner indoor unit 20 of the embodiment is usually a cabinet type air conditioner indoor unit 20, and the air inlet 21A is usually formed on the side surface of the cabinet 21 and has a certain length in the longitudinal direction. The cabinet type air conditioner indoor unit 20 can be in the form of a square cabinet as shown, or in the form of a cylinder or other shapes. However, the air conditioner indoor unit 20 of the embodiment is not limited to the cabinet type air conditioner indoor unit 20, but can include other types of air conditioners such as wall-mounted air conditioner indoor units 20 and air conditioner window units. Figure 1 As shown, the stopper 24 defines an upwardly open accommodating cavity; the baffle is the bottom wall of the accommodating cavity.

[0072] The air conditioner 10 is used for adjusting indoor air, and specifically can include one or more functions of adjusting temperature, humidity, air quality, humidifying, dehumidifying, introducing fresh air, etc. of the air. It can be understood that, in terms of temperature adjustment, the air conditioner indoor unit 20 of the embodiment can have other blowing modes not described in addition to the part blowing modes already listed, and the part blowing modes listed in the embodiment are only used to explain specific blowing modes and are not a limitation on the types of blowing modes.

[0073] The air conditioner 10 can be composed of an evaporator, a condenser, a compressor, a throttling device and other necessary elements to form a vapor compression refrigeration cycle system, so as to output cold air / warm air through the air conditioner indoor unit 20 to achieve refrigeration and heating of the indoor environment.

[0074] At this point, those skilled in the art should recognize that, although the present application has been shown and described in detail in the above embodiments, many other variations or modifications can be determined or deduced directly according to the disclosure of the present application without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and recognized as covering all these other variations or modifications.

Claims

1. An air conditioner indoor unit, characterized by Comprising: a casing, a surface of which is provided with an air inlet opening in a longitudinal direction; an air inlet grille, which is detachably arranged at the air inlet opening and has a fixed position relative to the casing in a transverse direction and a detachable position relative to the casing in the transverse direction; the air inlet grille is configured to be moved upwardly from the fixed position to the detachable position or downwardly from the detachable position to the fixed position; a filter screen, which is detachably arranged inside the air inlet grille; and a stopper, which is detachably arranged above the air inlet opening and abuts against a top end of the air inlet grille to prevent the air inlet grille from being moved upwardly from the fixed position.

2. The air conditioner indoor unit according to claim 1, characterized in that the casing is provided with a fixed frame around the air inlet opening, the fixed frame being located inside the air inlet grille; an inner surface of the air inlet grille is provided with a plurality of downwardly extending hooks, and the fixed frame is provided with a hook hole corresponding to each of the hooks; each of the hooks is configured to extend into one of the hook holes when the air inlet grille is in the detachable position, and to be transversely clamped with a lower side of the hook hole when the air inlet grille is moved downwardly to the fixed position.

3. The air conditioner indoor unit according to claim 1, characterized in that an inner side of the air inlet grille is provided with a recess, and a side wall of the recess is provided with a buckle protruding therefrom to detachably fix the filter screen in the recess. Further comprising:

4. The indoor unit of claim 1, wherein a fixing member arranged on the casing above the air inlet opening to change a fixing state of the stopper. Further comprising:

5. The air conditioner indoor unit according to claim 4, characterized in that the fixing member is a knob, which is rotatably arranged on the casing and configured to change the fixing state of the stopper by rotation.

6. The air conditioner indoor unit according to claim 5, characterized in that the stopper is provided with a through hole in a shape of a circle, and a through groove located at a side of the through hole and communicating with the through hole; the knob comprises: a base rotatably arranged on the casing; a connecting shaft extending outwardly from the base and passing through the through hole and rotating coaxially with the base; and a lock protruding from an end of the connecting shaft and extending sidewardly of the connecting shaft; a shape of the lock protruding from the side of the connecting shaft corresponds to a shape of the through groove, so that the lock can pass through the stopper or be clamped at a side of the through hole.

7. The air conditioner indoor unit according to claim 1, characterized in that the stopper has a baffle extending outwardly in the transverse direction.

8. The air conditioner indoor unit according to claim 7, characterized in that the stopper defines an accommodating cavity opening upwardly; and the baffle is a bottom wall of the accommodating cavity.

9. The air conditioner indoor unit according to claim 1, characterized in that a side wall of the stopper is further provided with a slide rail, and the casing is provided with a slide groove corresponding to the slide rail; the slide rail and the slide groove are engaged to limit the transverse movement of the stopper relative to the casing. Comprising:

10. An air conditioner characterized by an air conditioner indoor unit, which is the air conditioner indoor unit according to any one of claims 1-9. ​