Air conditioner

Abstract

The application provides an air conditioner, and relates to the technical field of air conditioners. The air conditioner comprises a filter screen assembly and a shell provided with an air return port. The filter screen assembly comprises a driving shaft rotatably connected to the shell, a driven shaft, and a conveying belt sleeved on the driving shaft and the driven shaft. The driving shaft and the driven shaft are located on opposite sides of the outer periphery of the air return port. The conveying belt is connected with a filter screen capable of shielding the air return port. The air conditioner further comprises a driving assembly and a dust suction assembly arranged on the shell. The driving assembly is connected to the driving shaft and is used for driving the driving shaft to rotate. The annular conveying track of the filter screen comprises a dust removal section. The dust removal section is located in a dust suction area of the dust suction assembly. The dust suction assembly in the air conditioner can perform dust suction treatment on the dust of the filter screen, thereby realizing continuous use of the filter screen, reducing the disassembly, cleaning and replacement operation of the filter screen assembly, and improving the use convenience of the filter screen assembly and the air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an air conditioner. BACKGROUND

[0002] Air conditioners are widely used for temperature adjustment of indoor environment. The return air inlet of the existing indoor unit is generally provided with a filter screen to filter the airflow entering the air duct, so as to reduce the plugging damage of the airflow to the air duct components and the adverse effects on the heat exchange efficiency. With the plugging of the filter screen by dust, the filter screen component needs to be disassembled and cleaned or replaced every period of time, which is poor in use convenience. SUMMARY

[0003] The purpose of the present application includes providing an air conditioner to solve the technical problem of the existing filter screen component which needs to be cleaned or replaced regularly and is poor in use convenience.

[0004] To solve the above problems, the present application provides an air conditioner, which comprises a filter screen component and a shell provided with a return air inlet. The filter screen component comprises a driving shaft, a driven shaft and a conveying belt sleeved on the two shafts, the driving shaft and the driven shaft are located on the opposite sides of the periphery of the return air inlet, and the conveying belt is connected with a filter screen capable of shielding the return air inlet.

[0005] The air conditioner further comprises a driving assembly and a dust suction assembly provided in the shell. The driving assembly is connected to the driving shaft and used for driving the driving shaft to rotate. The annular conveying track of the filter screen comprises a dust removal section, and the dust removal section is located in the dust suction area of the dust suction assembly.

[0006] In the air conditioner provided by the present application, the dust suction assembly can be controlled to perform dust suction treatment on the filter screen before the air conditioner is started or before the air conditioner is turned off according to actual needs. Specifically, the dust suction assembly and the driving assembly can be started, the driving assembly drives the driving shaft to rotate, and then drives the conveying belt to drive the filter screen to rotate around the driving shaft and the driven shaft. Therefore, the entire area of the filter screen passes through the dust removal section in sequence, and the dust on the filter screen can be separated from the filter screen and enter the dust suction assembly under the suction of the dust suction assembly during the passing through the dust removal section. Thus, the dust suction assembly can continuously perform dust suction treatment on the filter screen, which reduces the plugging of the filter screen by dust and improves the filtering capacity and ventilation capacity of the filter screen. After completing the dust suction treatment on the entire area of the filter screen, the dust suction assembly can be turned off. After the driving assembly drives the filter screen to reach a position capable of shielding the return air inlet through the driving shaft and the conveying belt, the driving assembly is turned off. During the subsequent operation of the air conditioner, the filter screen with high cleanliness not only can effectively filter the airflow but also causes small resistance to the airflow, so that the filter screen can be used for a long time without disassembly and replacement of the filter screen component, and the use convenience of the filter screen component and the air conditioner is improved.

[0007] Optionally, the return air inlet is rectangular, the driving shaft and the driven shaft are located at two sides of the length direction of the return air inlet; the dust suction port of the dust suction assembly is strip-shaped, the extension direction of the dust suction port is consistent with the width direction of the return air inlet, and the extension area of the dust suction port completely covers the width range of the return air inlet.

[0008] Optionally, the dust suction port is located above the annular conveying track.

[0009] Optionally, the first end of the length direction of the annular conveying track is towards the electric control box of the air conditioner, and the dust suction port is located above the first end of the length direction of the annular conveying track.

[0010] Optionally, the dust suction assembly comprises a dust suction pipe located outside the shell, a suction nozzle extending downward is communicated with the dust suction end of the dust suction pipe, and the suction nozzle extends through the return air inlet to above the annular conveying track.

[0011] Optionally, the return air inlet is located on the top plate of the shell, the dust suction pipe comprises a horizontal section extending along the top plate and a vertical section extending along the side plate of the shell, one end of the horizontal section is communicated with the top end of the suction nozzle, and the other end is communicated with the top end of the vertical section; the suction nozzle is attached to the side wall of the corresponding side of the return air inlet.

[0012] Optionally, the output end of the dust suction pipe is communicated with the dirty air discharge channel of the fresh air assembly in the air conditioner.

[0013] Optionally, the air conditioner further comprises a cleaning assembly arranged in the shell, and a cleaning end of the cleaning assembly is located upstream of the dust removal section, for cleaning dust in the corresponding area of the filter screen.

[0014] Optionally, the driving shaft and the driven shaft are gear shafts, and the conveying belt is a rack belt and is engaged with the gear shafts.

[0015] Optionally, the conveying belt is two, a framework is connected between the two conveying belts, and the filter screen is supported on the framework.

[0016] Optionally, the filter screen is a screen section, the extension length of the filter screen is greater than the length of the return air inlet and less than or equal to the single-trip length of the annular conveying track.

[0017] Alternatively, the filter screen and the conveying belt are annular screens. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to explain the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on the provided drawings.

[0019] Figure 1 The first perspective view of the air conditioner provided by the present application;

[0020] Figure 2 The second perspective view of the air conditioner provided by the present application;

[0021] Figure 3 The front view of the internal schematic diagram of the air conditioner provided by the present application;

[0022] Figure 4 The partial enlarged view of A in the figure; Figure 3

[0023] Figure 5 The internal axonometric view of the air conditioner provided by the present application.

[0024] Explanation of the reference signs:

[0025] 100 - filter assembly; 110 - driving shaft; 120 - driven shaft; 130 - conveying belt; 140 - filter; 150 - skeleton; 200 - shell; 210 - top plate; 211 - return air inlet; 300 - dust suction assembly; 310 - dust suction pipe; 311 - horizontal section; 311a - first conveying section; 311b - flared section; 311c - second conveying section; 312 - vertical section; 320 - suction nozzle; 321 - dust suction port; 400 - fresh air assembly; 410 - fan; 420 - dirty air discharge passage. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0027] The present embodiment provides an air conditioner, such as Figure 3 and Figure 5 ​As shown, the air conditioner comprises a filter screen assembly 100 and a shell 200 provided with a return air inlet 211, the filter screen assembly 100 comprises a driving shaft 110 rotatably connected to the shell 200, a driven shaft 120 and a conveying belt 130 sleeved on the driving shaft 110 and the driven shaft 120, the driving shaft 110 and the driven shaft 120 are located on opposite sides of the outer periphery of the return air inlet 211, and the conveying belt 130 is connected with a filter screen 140 capable of shielding the return air inlet 211; the air conditioner further comprises a driving assembly and a dust suction assembly 300 provided in the shell 200, the driving assembly is connected to the driving shaft 110 and used for driving the driving shaft 110 to rotate, and the annular conveying track of the filter screen 140 comprises a dust removal section located in a dust suction area of the dust suction assembly 300.

[0028] In the air conditioner provided by the embodiment, the length and the width of the filter screen 140 are not less than the length and the width of the return air inlet 211, so as to ensure that the filter screen 140 shields and filters the return air inlet 211; the driving assembly is used for driving the driving shaft 110 to rotate, so as to drive the conveying belt 130 and the filter screen 140 thereon to move along the length direction of the return air inlet 211; the dust suction assembly 300 is used for sucking dust on the filter screen 140 located in the dust removal section, so as to reduce the degree of blockage of the filter screen 140 by dust and improve the effective filtering property of the filter screen 140. When the air conditioner is in a standby state, the driving assembly can drive the driving shaft 110 to rotate, so as to drive the conveying belt 130 and the filter screen 140 thereon to be located at a position shielding the return air inlet 211, so as to reduce the pollution and blockage of the air duct assembly caused by dust in the external environment entering the air duct through the return air inlet 211; when the air conditioner is in a running state, the filter screen 140 is also located at the position shielding the return air inlet 211, and airflow flowing through the return air inlet 211 needs to pass through the filter screen 140 for filtering treatment, so as to improve the cleaning degree of the airflow entering the air duct, reduce the blockage and pollution of the air duct assembly caused by dust mixed in the airflow and improve the cleaning degree of the air outlet of the air conditioner.

[0029] Wherein, the dust suction assembly 300 can be controlled to perform dust suction treatment on the filter screen 140 before the air conditioner is started or before the air conditioner is turned off according to actual needs. Specifically, the dust suction assembly 300 and the driving assembly can be started, the driving assembly drives the driving shaft 110 to rotate, and then drives the filter screen 140 to rotate around the driving shaft 110 and the driven shaft 120 through the transmission belt 130. Then, the entire area of the filter screen 140 passes through the dust removal section in turn, and in the process of passing through the dust removal section, the dust on the filter screen 140 can be separated from the filter screen 140 and enter the dust suction assembly 300 under the suction of the dust suction assembly 300, thereby realizing continuous dust suction treatment of the filter screen 140 by the dust suction assembly 300, reducing the plugging of the filter screen 140 by dust, improving the filtering capacity and ventilation capacity of the filter screen 140, and correspondingly improving the use convenience of the filter screen assembly 100 and the air conditioner.

[0030] In addition, compared with the form that one end of the filter screen 140 is wound on the winding shaft and the other end is fixed on the transmission belt 130, the winding shaft changes the process of the filter screen 140 in the dust removal section area by winding the filter screen 140. When the winding shaft and the transmission belt 130 slip and move relatively, the filter screen 140 will be stacked and wrinkled, and even be torn. In other words, in order to ensure the flatness of the screen section of the filter screen 140 wound on the winding shaft and the screen section connected between the transmission belt 130 and the winding shaft, the winding shaft and the transmission belt 130 need to be synchronously driven. The synchronism of the winding shaft and the transmission belt 130 is required to be high. The air conditioner of the present application drives the filter screen 140 to move along the annular transmission track by the transmission mechanism composed of the driving shaft 110, the driven shaft 120 and the transmission belt 130, so that the entire area of the filter screen 140 can pass through the dust removal section in turn. Since the filter screen 140 is independently connected to the transmission belt 130 and is not affected by the driving shaft 110 and the driven shaft 120, even if the driving shaft 110, the driven shaft 120 and the transmission belt 130 slip or lag, the flatness of the filter screen 140 will not be affected. Therefore, on the basis of ensuring the flatness, effective use and dust suction treatment of the entire area of the filter screen 140 by the dust suction assembly 300, the synchronous transmission requirement of the transmission belt 130 and the driving shaft 110 and the driven shaft 120 is reduced, the failure of the filter screen assembly 100 is correspondingly reduced, and the normal use of the filter screen assembly 100 is ensured.

[0031] Specifically, in the present embodiment, as shown in Figure 3 and Figure 4As shown, the driving shaft 110 and the driven shaft 120 are gear shafts, and the conveying belt 130 is a rack belt and is engaged with the gear shafts. The gear shafts and the rack belt are used to improve the synchronous transmission of the conveying belt and the driving shaft 110 and the driven shaft 120, thereby ensuring the effective transmission of the driving assembly, the driving shaft 110, the driven shaft 120 and the conveying belt to the filter screen 140 and reducing the occurrence of the slippage of the conveying belt 130 and the driving shaft 110 and the driven shaft 120.

[0032] In this embodiment, as shown in Figure 5 The conveying belt 130 is two, and the skeleton 150 is connected between the two conveying belts 130, and the filter screen 140 is supported on the skeleton 150. The conveying belt 130 is located at both sides of the width direction of the filter screen 140 to expand both ends of the width direction of the filter screen 140, and the skeleton 150 between the two conveying belts 130 can effectively support the filter screen 140 to ensure the flatness of the filter screen 140, thereby ensuring the effective shielding of the filter screen 140 to the return air inlet 211.

[0033] Optionally, in this embodiment, as shown in Figure 5 The return air inlet 211 is rectangular, and the driving shaft 110 and the driven shaft 120 are located at both sides of the length direction of the return air inlet 211. The suction port 321 of the dust collection assembly 300 is strip-shaped, the extension direction of the suction port 321 is consistent with the width direction of the return air inlet 211, and the extension area of the suction port 321 completely covers the width range of the return air inlet 211. In the indoor unit, especially for the wall-mounted indoor unit, the length-width size difference of the appearance is large, and accordingly, the length-width size difference of the return air inlet 211 is also large. The driving shaft 110 and the driven shaft 120 are located at both sides of the length direction of the return air inlet 211, so that the conveying belt 130 and the filter screen 140 thereon are conveyed along the length direction of the return air inlet 211. Compared with the extension of the suction port 321 of the dust collection assembly 300 along the length direction of the return air inlet 211, the pipeline of the dust collection assembly 300 for setting the suction port 321 is long, which not only occupies a large space, but also has a large shielding area to the filter screen 140 and the corresponding return air inlet 211 and heat exchange assembly, which greatly affects the air inlet amount and heat exchange efficiency of the air conditioner. The suction port 321 of the present application extends along the width direction of the return air inlet 211 and can cover the width range of the return air inlet 211, which can greatly reduce the occupation of space and the shielding area of the return air inlet 211 and the heat exchange assembly on the basis of ensuring the overall dust collection treatment to the exposed area of the filter screen 140, thereby ensuring the air conditioner to have a high air inlet amount and heat exchange efficiency.

[0034] Specifically, in this embodiment, as shown in Figure 4As shown, the dust suction port 321 is located above the annular conveying track. The dust suction port 321, the filter screen 140 and the air duct assembly are arranged in sequence in the up-down direction. The dust suction port 321 sucks the dust on the top surface of the filter screen 140 upward away from the air duct assembly and into the dust suction assembly 300, which can effectively reduce the situation that the dust on the bottom surface of the filter screen 140 easily falls downward when the dust suction port 321 is located below the annular conveying track, and the situation that the dust moves downward toward the air duct assembly when the dust suction port 321 sucks the dust downward, which can easily cause secondary pollution to the air duct assembly, thereby improving the dust suction effectiveness of the dust suction assembly 300 on the filter screen 140.

[0035] In this embodiment, the first end of the annular conveying track in the length direction faces the electric control box of the air conditioner, and the dust suction port 321 is located above the first end of the annular conveying track in the length direction. The dust suction port 321 is located at one end of the annular conveying track in the length direction, which has less shielding to the filter screen 140. When the dust suction assembly 300 is started, it can produce a suction and dust removal effect on the dust removal section, and at the same time, it can also produce a suction and dust removal effect on the area where the electric control box is located, thereby reducing the adverse effects caused by the electric control box being covered with dust. In addition, when the dust suction assembly 300 is started, it can also drive the airflow in the area where the electric control box is located, thereby enhancing the convective heat dissipation of the airflow on the electric control box. Especially when the electric control box is under heavy load and is prone to heating, the dust suction assembly 300 can be started to dissipate heat for the electric control box, which can ensure the safe use of the electric control box and improve the functionality of the dust suction assembly 300.

[0036] Optionally, in this embodiment, as shown in Figure 3 and Figure 4 , the dust suction assembly 300 includes a dust suction pipe 310 located outside the shell 200, and the dust suction end of the dust suction pipe 310 is communicated with a suction nozzle 320 extending downward. The suction nozzle 320 extends through the return air port 211 to above the annular conveying track. On the one hand, the dust suction pipe 310 is located outside the shell 200, which does not occupy the internal space of the shell 200 on the basis of realizing the suction and dust removal of the filter screen 140, thereby ensuring the layout of the heat exchange assembly, the air duct assembly, the electric control box and the like in the internal space of the shell 200, and reducing the shielding of the heat exchange assembly and the air duct passage caused by the dust suction pipe 310. On the other hand, the suction nozzle 320 extending downward into the return air port 211 is arranged at the dust suction end of the dust suction pipe 310. When the dust suction assembly 300 is started, the suction nozzle 320 is close to the filter screen 140, and the suction intensity on the filter screen 140 is relatively large, which can effectively suck the dust on the filter screen 140, thereby improving the dust removal effect of the dust suction assembly 300 on the filter screen 140 and ensuring the filtering effect and ventilation effect of the filter screen 140.

[0037] Specifically, in this embodiment, as shown in Figure 1 and Figure 2As shown, the return air inlet 211 is located on the top plate 210 of the shell 200, the dust suction pipe 310 includes a horizontal section 311 extending along the top plate 210 and a vertical section 312 extending along the side plate of the shell 200, one end of the horizontal section 311 is communicated with the top end of the suction nozzle 320, and the other end is communicated with the top end of the vertical section 312; the suction nozzle 320 is attached to the side wall of the corresponding side of the return air inlet 211. The return air inlet 211 is located on the top plate 210, and the dust suction pipe 310 extends along the top plate 210 and the side plate of the shell 200, and the volume protruding outside the shell 200 is small, which has a small impact on the overall size of the air conditioner, and the user's visual perception of the appearance of the air conditioner is ensured; in addition, the suction nozzle 320 is attached to the side wall of the return air inlet 211, and the shielding area of the return air inlet 211 is small, which ensures the effective air inlet of the return air inlet 211.

[0038] Preferably, a first damping gap is left between the horizontal section 311 and the top plate 210, and a second damping gap is left between the vertical section 312 and the side plate, so as to reduce the noise pollution caused by the vibration between the shell 200 and the dust suction pipe 310 during the operation of the air conditioner or the vibration between the dust suction pipe 310 and the shell 200 during the operation of the dust suction assembly 300.

[0039] In this embodiment, as shown in Figure 1 and Figure 2 , the horizontal section 311 includes a first conveying section 311a, an expanding section 311b and a second conveying section 311c in sequence in the direction away from the vertical section 312, wherein the size of the first conveying section 311a is consistent with the necked end of the expanding section 311b, and the size of the second conveying section 311c is consistent with the flared end of the expanding section 311b. The horizontal section 311 is provided as a variable diameter section to realize the connection of the small size vertical section 312 and the large size suction nozzle 320 in the width direction of the return air inlet 211, and to reduce the dead angle in the dust suction pipe 310, thereby reducing the deposition of dust in the dust suction pipe 310.

[0040] Optionally, in this embodiment, the output end of the dust suction pipe 310 is communicated with the dirty air discharge channel 420 of the fresh air assembly 400 of the air conditioner. The fresh air assembly 400 of the air conditioner is simultaneously used as the power part of the dust suction assembly 300, thereby improving the functionality of the fresh air assembly 400 and reducing the space occupation and cost of the dust suction assembly 300; when it is necessary to perform dust suction treatment on the filter screen 140, the fresh air assembly 400 can be adjusted to the dirty air discharge mode, the fan 410 of the fresh air assembly 400 can generate suction on the dirty air discharge channel 420, and the dust suction pipe 310 and the suction nozzle 320 are correspondingly sucked through the dirty air discharge channel 420, thereby realizing the suction and dust removal of the filter screen 140 by the suction nozzle 320.

[0041] Preferably, a control valve can be arranged at the communication between the dust suction pipe 310 and the dirty air discharge passage 420, and only when dirty air needs to be discharged, the control valve can be adjusted to block the communication port of the dust suction pipe 310, and only when dust needs to be removed, the control valve can be adjusted to block the port of the dirty air discharge passage 420 towards the indoor space, so as to realize the relative independent operation of the dirty air discharge and the suction dust removal.

[0042] Of course, in other embodiments, the dust suction assembly 300 can also include a power component independent of the fresh air assembly 400, or the dust suction pipe 310 can be connected to a power component independent of the air conditioner.

[0043] Specifically, in the present embodiment, the filter screen 140 is a net segment, and the extension length of the filter screen 140 is greater than the length of the return air inlet 211 and less than or equal to the single-trip length of the annular conveying track. The annular conveying track approximately includes an upper track segment and a lower track segment. In use, the driving assembly drives the filter screen 140 to rotate to the upper track segment through the driving shaft 110 and the conveying belt 130, and then the dust falls to the top surface of the filter screen 140. The dust suction port 321 is located at one end of the length direction of the filter screen 140. When the filter screen 140 needs to be cleaned, the dust suction assembly 300 is first started, and then the driving assembly drives the filter screen 140 to move towards the dust suction port 321, so that the filter screen 140 is first subjected to the dust suction treatment of the dust suction port 321 and then rotates downward to the lower track segment, thereby reducing the situation that the filter screen 140 rotates to the lower track segment first, the top surface of the filter screen 140 becomes the bottom surface, and the dust on the filter screen 140 falls downward to the air duct, causing secondary pollution to the air duct assembly and the like. Accordingly, the effective filtration of the filter screen 140 on the dust is further ensured.

[0044] Of course, in other embodiments, the filter screen 140 can also be an annular net corresponding to the conveying belt. In use, the filter screen 140 can ensure the shielding and filtration of the return air inlet 211 regardless of the stopping position of the filter screen 140, thereby improving the effectiveness and convenience of the use of the filter screen assembly 100 and reducing the occurrence of the situation that the filter screen 140 is in the form of a net segment and the stopping position of the filter screen 140 is located at one side, causing the local return air inlet 211 to be open.

[0045] In the present embodiment, the air conditioner can further include a cleaning assembly arranged on the shell 200, and a cleaning end of the cleaning assembly is located upstream of the dust removal section and is used to clean the dust on the corresponding area of the filter screen 140. When the filter screen 140 needs to be subjected to the dust suction treatment, the cleaning assembly first performs the cleaning treatment on the filter screen 140 during the movement of the filter screen 140 under the driving of the driving assembly, so as to loosen the dust on the filter screen 140. Then, the filter screen 140 segment with the loosened dust rotates to the dust removal section, and the loosened dust is more easily separated from the filter screen 140 and enters the dust suction assembly 300 under the suction action of the dust suction port 321, thereby further improving the dust removal efficiency of the dust suction assembly 300 on the filter screen 140 and correspondingly further improving the effective filtration and ventilation of the filter screen 140.

[0046] Finally, it should be noted that the terms "first" and "second", and the like, merely serve to distinguish one entity or action from another without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0047] The above description of disclosed embodiments provides enabling concepts for practicing or using the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air conditioner characterized by comprising: The air conditioner comprises a filter screen assembly (100) and a shell (200) provided with a return air inlet (211), the filter screen assembly (100) comprises a driving shaft (110) and a driven shaft (120) rotatably connected to the shell (200) and a conveying belt (130) sleeved on the driving shaft (110) and the driven shaft (120), the driving shaft (110) and the driven shaft (120) are located on opposite sides of the periphery of the return air inlet (211), and the conveying belt (130) is connected with a filter screen (140) capable of shielding the return air inlet (211). The air conditioner further comprises a driving assembly and a dust suction assembly (300) provided in the shell (200), the driving assembly is connected to the driving shaft (110) and used for driving the driving shaft (110) to rotate, and the annular conveying track of the filter screen (140) comprises a dust removal section located in a dust suction area of the dust suction assembly (300). The return air inlet (211) is located on a top plate (210) of the shell (200), the dust suction assembly (300) comprises a dust suction pipe (310) located outside the shell (200), a suction nozzle (320) extending downward is communicated with a suction end of the dust suction pipe (310), and the suction nozzle (320) extends to above the annular conveying track through the return air inlet (211). The dust suction pipe (310) comprises a horizontal section (311) extending along the top plate (210) and a vertical section (312) extending along a side plate of the shell (200), one end of the horizontal section (311) is communicated with a top end of the suction nozzle (320), the other end of the horizontal section (311) is communicated with a top end of the vertical section (312), a first damping gap is left between the horizontal section (311) and the top plate (210), a second damping gap is left between the vertical section (312) and the side plate, and the suction nozzle (320) is attached to a side wall of a corresponding side of the return air inlet (211).

2. The air conditioner of claim 1, wherein The return air inlet (211) is rectangular, the driving shaft (110) and the driven shaft (120) are located on two sides in the length direction of the return air inlet (211), the dust suction port (321) of the dust suction assembly (300) is strip-shaped, the extension direction of the dust suction port (321) is consistent with the width direction of the return air inlet (211), and the extension area of the dust suction port (321) completely covers the width range of the return air inlet (211).

3. The air conditioner of claim 2, wherein The dust suction port (321) is located above the annular conveying track.

4. The air conditioner of claim 3, wherein A first end portion of the annular conveying track in the length direction faces an electric control box of the air conditioner, and the dust suction port (321) is located above the first end portion of the annular conveying track in the length direction.

5. The air conditioner of claim 1, wherein An output end of the dust suction pipe (310) is communicated with a dirty air discharge channel (420) of a fresh air assembly (400) in the air conditioner.

6. The air conditioner according to any one of claims 1 to 4, wherein The air conditioner further comprises a cleaning assembly provided in the shell (200), a cleaning end of the cleaning assembly is located upstream of the dust removal section, and the cleaning end is used for cleaning dust in a corresponding area of the filter screen (140).

7. The air conditioner according to any one of claims 1 to 4, wherein The driving shaft (110) and the driven shaft (120) are gear shafts, and the conveying belt (130) is a rack belt and is engaged with the gear shafts.

8. The air conditioner according to any one of claims 1 to 4, wherein The conveying belt (130) is two, and a framework (150) is connected between the two conveying belts (130), and the filter screen (140) is supported on the framework (150).

9. The air conditioner according to any one of claims 1 to 4, wherein The filter screen (140) is a screen section, the extension length of the filter screen (140) is greater than the length of the air return opening (211) and less than or equal to the single-trip length of the annular conveying track. Or, the filter screen (140) and the conveying belt correspond to an annular net.

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