Filter device, air duct assembly and air conditioner

Abstract

The present disclosure relates to a filter device, an air duct assembly and an air conditioner, the air duct assembly comprising a housing and a filter device, the housing having an inner circulating air duct, an outer circulating air duct and a supply air duct, an inlet end of the inner circulating air duct being configured to introduce indoor air, an inlet end of the outer circulating air duct being configured to introduce outdoor air; the filter device being detachably connected with the housing, the filter device comprising a first filter area and a second filter area, an outlet end of the inner circulating air duct being arranged corresponding to the first filter area, outlet ends of the outer circulating air duct being arranged corresponding to the first filter area and the second filter area, an inlet end of the supply air duct being arranged corresponding to the second filter area; wherein the outlet end of the inner circulating air duct and the supply air duct are arranged on the same side in the thickness direction of the filter device, the outer circulating air duct is arranged on the other side in the thickness direction of the filter device, and the inner circulating air duct is communicated with the supply air duct through the outer circulating air duct. The filter device of the air duct assembly of the present disclosure is convenient to disassemble and assemble.

Description

Technical Field

[0001] This disclosure relates to the field of household appliance technology, specifically to a filter device, an air duct assembly, and an air conditioner. Background Technology

[0002] Currently, air conditioners with fresh air functions are becoming increasingly common in the market. These fresh air modes include internal recirculation and external recirculation modes. In internal recirculation mode, indoor air enters the air conditioner through the fresh air inlet, is filtered by the first filter, reaches the air intake chamber, is filtered by the second filter, passes through the filter screen, and is then exhausted from the fresh air outlet by the fan. In external recirculation mode, outdoor air enters the air intake chamber through the fresh air duct, is filtered by the second filter, and is then exhausted from the fresh air outlet by the fan.

[0003] The first filter device is equipped with a regular filter, and the second filter device is equipped with a high-efficiency filter. In related technologies, the first and second filter devices are installed independently in the air duct of the air conditioner. When the first and second filter devices need to be cleaned or replaced, they need to be disassembled and reassembled separately, which is inconvenient. Summary of the Invention

[0004] This disclosure aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, embodiments of this disclosure propose an air duct assembly to improve the ease of assembly and disassembly of the filter device.

[0006] The air duct assembly of this embodiment includes a housing and a filter device. The housing has an internal circulation air duct, an external circulation air duct, and a supply air duct. The inlet end of the internal circulation air duct is used to introduce indoor air, and the inlet end of the external circulation air duct is used to introduce outdoor air. The filter device is detachably connected to the housing and includes a first filtration zone and a second filtration zone. The outlet end of the internal circulation air duct is disposed corresponding to the first filtration zone, the outlet end of the external circulation air duct is disposed corresponding to both the first and second filtration zones, and the inlet end of the supply air duct is disposed corresponding to the second filtration zone. The outlet end of the internal circulation air duct and the supply air duct are located on the same side of the thickness direction of the filter device, and the external circulation air duct is located on the other side of the thickness direction of the filter device. The internal circulation air duct is connected to the supply air duct through the external circulation air duct.

[0007] In some embodiments, the filtration device includes a mounting frame, a first filter screen, and a second filter screen, wherein the mounting frame is detachably connected to the housing; both the first filter screen and the second filter screen are disposed on the mounting frame, and at least one of the first filter screen and the second filter screen is detachably connected to the mounting frame; wherein the area where the first filter screen is located forms the first filtration area, and the area where the second filter screen is located forms the second filtration area.

[0008] In some embodiments, the first filter screen is disposed on at least one side of the second filter screen in a first preset direction; wherein the first preset direction intersects with the thickness direction of the filtering device.

[0009] In some embodiments, the second filter screen is detachably connected to the mounting bracket; the mounting bracket has a first mounting area and a first clearance portion communicating with the first mounting area, the first clearance portion being disposed on one side of the first mounting area in a first preset direction, the first mounting area being used to mount the second filter screen, and the first clearance portion being for the second filter screen to pass through.

[0010] In some embodiments, the first filter screen is disposed on both sides of the second filter screen in a first preset direction, at least one of the first filter screens is a spacer filter screen, the spacer filter screen and the second filter screen are spaced apart along the first preset direction, a first mounting area and a first clearance portion are formed between the spacer filter screen and the second filter screen, the first clearance portion is disposed closer to the spacer filter screen relative to the first mounting area in the first preset direction; and / or, the first mounting area is provided with a first slide rail extending along the first preset direction, the second filter screen is provided with a first mating portion, the first mating portion slidably mating with the first slide rail along the first preset direction.

[0011] In some embodiments, a partition is provided between the internal circulation duct and the air supply duct, the partition including a first seal and a second seal, the first seal being disposed inside the housing; the second seal being disposed on the mounting bracket and between the first filter and the second filter; wherein the first seal and the second seal are in a sealing fit.

[0012] In some embodiments, the first sealing element is a first sealing strip, the second sealing element is a second sealing strip, the second sealing strip is disposed on one side of the first sealing strip in the first preset direction, and the first sealing strip abuts against the second sealing strip along the first preset direction.

[0013] In some embodiments, the housing includes a second mounting area and a second clearance portion communicating with the second mounting area. The second clearance portion is located on one side of the second mounting area in a first preset direction. The second mounting area is used to mount the filter device, and the second clearance portion allows the filter device to pass through. The first filter screen is located on both sides of the second filter screen in a first preset direction. A second sealing strip is provided between each first filter screen and each second filter screen. The first sealing strip and the second sealing strip correspond one-to-one. The second sealing strip is located closer to the second clearance portion in the first preset direction than the first sealing strip corresponding to it. Among two adjacent first sealing strips, the height of the first sealing strip located closer to the second clearance portion is smaller than the height of the first sealing strip located farther from the second clearance portion. Among two adjacent second sealing strips, the height of the second sealing strip located closer to the second clearance portion is larger than the height of the second sealing strip located farther from the second clearance portion.

[0014] In some embodiments, the housing has a mounting cavity and a clearance hole communicating with the mounting cavity. The mounting cavity is connected to the internal circulation duct, the external circulation duct, and the air supply duct. The clearance hole is located on one side of the mounting cavity in a second preset direction. The mounting cavity is used to mount the filter device, and the clearance hole allows the filter device to pass through. The second preset direction intersects with the thickness direction of the filter device.

[0015] In some embodiments, the mounting cavity is provided with a second slide rail extending along the second preset direction, and the filter device is provided with a second mating part, which slidably engages with the second slide rail along the second preset direction.

[0016] In some embodiments, the filter device is provided with a sealing plate on the side near the clearance hole, the sealing plate being used to seal the clearance hole; the hole wall of the clearance hole has a housing sealing portion, the sealing plate has a plate sealing portion, and the plate sealing portion is in sealing cooperation with the housing sealing portion.

[0017] In some embodiments, the housing sealing portion is a first stop, the plate sealing portion is a second stop, and the second stop is sealed to the first stop; and / or, the sealing plate is a Z-shaped plate, the sealing plate includes a first plate, a second plate and a third plate connected in sequence, the third plate is disposed closer to the clearance hole than the first plate, and the third plate has a notch so that the third plate forms a handle.

[0018] In some embodiments, the housing is provided with a third seal; the filter device is provided with a fourth seal, which is disposed closer to the sealing plate than the first filter area and the second filter area, and the fourth seal is sealed in conjunction with the third seal.

[0019] In some embodiments, the third sealing element is a third sealing strip, the fourth sealing element is a fourth sealing strip, the fourth sealing strip is disposed on one side of the third sealing strip in the second preset direction, and the fourth sealing strip abuts against the third sealing strip along the second preset direction.

[0020] In some embodiments, the sealing plate is disposed closer to the clearance hole than the fourth sealing strip; wherein the height of the third sealing strip is greater than the height of the housing sealing portion, and the height of the fourth sealing strip is less than the height of the sealing plate.

[0021] In some embodiments, the first filter screen is a single-layer filter screen, and the second filter screen is a HEPA filter screen; and / or, the plane on which the first filter screen is located is an arc-shaped surface; and / or, the plane on which the second filter screen is located is an arc-shaped surface.

[0022] In some embodiments, the housing includes an inner circulation frame and an outer circulation frame, the outer circulation frame being detachably connected to the inner circulation frame; wherein, a partition is provided between the inner circulation duct and the air supply duct, the inner circulation frame and the partition forming the inner circulation duct, the inner circulation frame and the partition forming the air supply duct, and the inner circulation duct being located on one side of the air supply duct in a first preset direction; the outer circulation frame forming the outer circulation duct, or the outer circulation frame and the inner circulation frame forming the outer circulation duct; the filter device is detachably connected to at least one of the inner circulation frame and the outer circulation frame.

[0023] In some embodiments, the first filter screen is disposed on both sides of the second filter screen in the first preset direction, and the internal circulation air duct is disposed on both sides of the air supply air duct in the first preset direction; the internal circulation frame includes a middle part and side parts disposed on both sides of the middle part in the first preset direction, and each side part and the middle part is provided with the partition; the side parts and the partitions form the internal circulation air duct, and the middle part and the partitions form the air supply air duct.

[0024] In some embodiments, the side portions protrude from the middle portion in the thickness direction of the filter device toward the direction away from the external circulation frame, and the middle portion and the side portions located on both sides of the middle portion in the first preset direction form an installation space; the air duct assembly further includes a fan, the fan is located in the installation space, and the inlet of the fan is located corresponding to the outlet end of the air supply duct.

[0025] In some embodiments, the inlet end of the internal circulation duct and the inlet end of the external circulation duct are arranged opposite each other along the thickness direction of the filter device.

[0026] Embodiments of this disclosure also propose a filtration device.

[0027] The filtering device of this disclosure is the filtering device described in any of the above embodiments.

[0028] An air conditioner is also proposed in the embodiments of this disclosure.

[0029] The air conditioner of this disclosure includes the air duct assembly described in any of the above embodiments.

[0030] When the air duct assembly of this embodiment operates in the fresh air recirculation mode, indoor air enters the recirculation duct through the inlet end; then, it reaches the first filtration zone through the outlet end of the recirculation duct, is filtered by the first filtration zone, and enters the external recirculation duct through the outlet end of the external recirculation duct; subsequently, it reaches the second filtration zone through the outlet end of the external recirculation duct, is filtered by the second filtration zone, and is discharged through the supply air duct. When the air duct assembly of this embodiment operates in the fresh air external recirculation mode, outdoor air enters the external recirculation duct through the inlet end of the external recirculation duct; then, it reaches the second filtration zone through the outlet end of the external recirculation duct, is filtered by the second filtration zone, and is discharged through the supply air duct.

[0031] The air duct assembly of this disclosure integrates the functions of multiple filters (e.g., the first filter area functions as a conventional filter, and the second filter area functions as a high-efficiency filter) by providing a first filter zone and a second filter zone on the same filter device. This integrates the functions of multiple filters in related technologies onto a single filter device. Compared to related technologies where multiple different filters need to be installed independently within the air duct, this significantly reduces the number of filters. Therefore, when cleaning or replacing the filters within the air duct assembly is required, only a few, or even just one, filters need to be disassembled and installed, improving the ease of disassembly and assembly of the filters. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a duct assembly according to an embodiment of the present disclosure.

[0033] Figure 2 This is an exploded view of a duct assembly according to an embodiment of the present disclosure.

[0034] Figure 3 This is an airflow direction diagram of a duct assembly according to an embodiment of the present disclosure during operation.

[0035] Figure 4 yes Figure 2 A schematic diagram of the internal circulation frame.

[0036] Figure 5 yes Figure 2 A schematic diagram of the structure of the filter device.

[0037] Figure 6 yes Figure 2 A schematic diagram of the internal and external circulation frame.

[0038] Figure 7 This is a cross-sectional view of a duct assembly according to an embodiment of the present disclosure.

[0039] Figure 8 yes Figure 7 Enlarged view of point A in the middle.

[0040] Figure 9 yes Figure 7 Enlarged view of point B in the middle.

[0041] Figure 10 yes Figure 7 A magnified view of point C in the middle.

[0042] Figure 11 This is a front view of an air conditioner according to an embodiment of this disclosure.

[0043] Figure 12 This is a side view of an air conditioner according to an embodiment of the present disclosure.

[0044] Figure 13 This is an exploded view of an air conditioner according to an embodiment of this disclosure.

[0045] Figure label:

[0046] 100. Air conditioner;

[0047] 10. Air duct components;

[0048] 1. Shell; 11. Inner circulation frame; 111. Main body; 1111. Middle part; 1112. Side part; 1113. Installation space; 1114. First inlet; 1115. Second inlet; 112. Inlet part; 12. Outer circulation frame; 121. Third inlet; 13. Air inlet damper; 14. Second installation area; 15. Second clearance part; 16. Installation cavity; 161. Second slide rail; 17. Clearance hole; 171. Shell sealing part; 18. Third seal; 101. Inner circulation duct; 102. Outer circulation duct; 103. Air supply duct;

[0049] 2. Filter device; 21. Mounting bracket; 211. First clearance part; 212. First slide rail; 213. First frame; 214. Second frame; 22. First filter screen; 23. Second filter screen; 24. Sealing plate; 241. First plate body; 242. Second plate body; 243. Third plate body; 2431. Plate body sealing part; 2432. Handle; 201. First filtration zone; 202. Second filtration zone; 203. Fourth sealing element;

[0050] 3. Partition; 31. First sealing element; 32. Second sealing element;

[0051] 4. Fan;

[0052] 5. Health module; 51. Fresh air outlet;

[0053] 6. Fresh air duct

[0054] 20. Front panel; 201. Air inlet of the casing; 202. Air outlet of the casing;

[0055] 30. Front housing;

[0056] 40. Rear housing;

[0057] 50. Base. Detailed Implementation

[0058] Embodiments of this disclosure are described in detail below, with examples of these embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting it.

[0059] like Figures 1 to 10As shown, the air duct assembly 10 of this embodiment includes a housing 1 and a filter device 2, which is detachably connected to the housing 1. The housing 1 has an internal circulation air duct 101, an external circulation air duct 102, and a supply air duct 103. The inlet end of the internal circulation air duct 101 is used to introduce indoor air, and the inlet end of the external circulation air duct 102 is used to introduce outdoor air. The filter device 2 includes a first filter zone 201 and a second filter zone 202. The outlet end of the internal circulation air duct 101 is disposed corresponding to the first filter zone 201, the outlet end of the external circulation air duct 102 is disposed corresponding to the first filter zone 201 and the second filter zone 202, and the inlet end of the supply air duct 103 is disposed corresponding to the second filter zone 202. The outlet end of the internal circulation air duct 101 and the supply air duct are located on the same side of the thickness direction of the filter device 2, and the external circulation air duct 102 is located on the other side of the thickness direction of the filter device 2. The internal circulation air duct 101 is connected to the supply air duct 103 through the external circulation air duct 102.

[0060] like Figure 3 As shown, when the air duct assembly 10 of this embodiment operates in the fresh air internal circulation mode, indoor air can enter the internal circulation air duct 101 through the inlet end; then, it reaches the first filtration zone 201 through the outlet end of the internal circulation air duct 101, and after being filtered by the first filtration zone 201, it enters the external circulation air duct 102 through the outlet end of the external circulation air duct 102; afterwards, it reaches the second filtration zone 202 through the outlet end of the external circulation air duct 102, and after being filtered by the second filtration zone 202, it is discharged through the supply air duct 103. When the air duct assembly 10 of this embodiment operates in the fresh air external circulation mode, outdoor air can enter the external circulation air duct 102 through the inlet end of the external circulation air duct 102; then, it reaches the second filtration zone 202 through the outlet end of the external circulation air duct 102, and after being filtered by the second filtration zone 202, it is discharged through the supply air duct 103. Figure 3 The arrows in the diagram indicate the direction of airflow.

[0061] The air duct assembly 10 of this embodiment integrates the functions of multiple filters (e.g., the first filter zone 201 functions as a conventional filter, and the second filter zone 202 functions as a high-efficiency filter) by providing a first filter zone 201 and a second filter zone 202 on the same filter device 2. This integrates the functions of multiple filters found in related technologies onto a single filter device 2. Compared to related technologies where multiple different filters need to be installed independently within the air duct, this significantly reduces the number of filter devices 2 required.

[0062] Therefore, when it is necessary to clean or replace the filter device 2 in the air duct assembly 10, only a few or even one filter device 2 need to be disassembled and installed, which improves the ease of disassembly and assembly of the filter device 2.

[0063] Therefore, the air duct assembly 10 of the present disclosure has advantages such as easy disassembly and assembly of the filter device 2.

[0064] In some embodiments, the inlet end of the internal circulation duct 101 and the inlet end of the external circulation duct 102 are arranged opposite to each other along the thickness direction of the filter device 2.

[0065] By setting the inlet end of the internal circulation duct 101 and the inlet end of the external circulation duct 102 opposite to each other along the thickness direction of the filter device 2, the indoor air entering through the inlet end of the internal circulation duct 101 can flow to the first filtration zone 201 of the filter device 2 in a straight line; the outdoor air entering through the inlet end of the external circulation duct 102 can flow to the second filtration zone 202 of the filter device 2 in a straight line.

[0066] This helps reduce the flow resistance of indoor and outdoor air, thereby increasing the fresh air volume of the duct assembly 10.

[0067] To make the technical solution of this disclosure easier to understand, the following description further illustrates the technical solution of this disclosure, taking the example that the thickness direction of the filter device 2 is consistent with the front-to-back direction. Wherein, the front-to-back direction is as follows... Figures 1 to 3 , Figure 7 As shown.

[0068] For example, such as Figure 3 As shown, both the internal circulation duct 101 and the air supply duct 103 are located in front of the external circulation duct 102, and the front end of the internal circulation duct 101 is the inlet end of the internal circulation duct 101, while the rear end of the external circulation duct 102 is the inlet end of the external circulation duct 102.

[0069] Of course, in other embodiments, only the outlet end of the internal circulation duct 101 and the air supply duct 103 may be located in front of the external circulation duct 102, while the inlet end of the internal circulation duct 101 may be located in the rear of the external circulation duct 102, or it may be located between the inlet end and the outlet end of the external circulation duct 102 in the front-back direction.

[0070] In some embodiments, such as Figure 5 As shown, the filter device 2 includes a mounting frame 21, a first filter screen 22, and a second filter screen 23. Both the first filter screen 22 and the second filter screen 23 are mounted on the mounting frame 21, and at least one of the first filter screen 22 and the second filter screen 23 is detachably connected to the mounting frame 21. The mounting frame 21 is detachably connected to the housing 1. The area where the first filter screen 22 is located forms a first filtration zone 201, and the area where the second filter screen 23 is located forms a second filtration zone 202.

[0071] At least one of the first filter screen 22 and the second filter screen 23 is detachably connected to the mounting bracket 21. This can be understood as: one of the first filter screen 22 and the second filter screen 23 is detachably connected to the mounting bracket 21, and the other of the first filter screen 22 and the second filter screen 23 is non-detachably connected to the mounting bracket 21; or, both the first filter screen 22 and the second filter screen 23 are detachably connected to the mounting bracket 21.

[0072] For example, the first filter 22 is detachably connected to the mounting bracket 21, so that when the first filter 22 needs to be replaced, the first filter 22 can be removed from the mounting bracket 21 and a new first filter 22 can be replaced, while the second filter 23 is retained; or, the second filter 23 is detachably connected to the mounting bracket 21, so that when the second filter 23 needs to be replaced, the second filter 23 can be removed from the mounting bracket 21 and a new second filter 23 can be replaced, while the first filter 22 is retained.

[0073] Therefore, when only the first filter area 201 or the second filter area 202 on the filter device 2 is damaged, only the corresponding area of ​​the filter device 2 needs to be replaced, instead of replacing the entire filter device 2, which helps to save the maintenance cost of the filter device 2.

[0074] Optionally, the first filter screen 22 is a single-layer filter screen, and the second filter screen 23 is a HEPA filter screen.

[0075] For example, the first filter 22 is a single-layer filter that can filter dust, and the second filter 23 is a HEPA (High Efficiency Particulate Air) filter that can filter PM2.5 and other particulate matter.

[0076] Therefore, when the air duct assembly 10 operates in the fresh air recirculation mode, the indoor air can first undergo primary filtration using the first filter screen 22, and then undergo deep filtration using the second filter screen 23, which helps to improve the filtration effect of the filter device 2 on the indoor air.

[0077] Optionally, such as Figure 5 As shown, the plane where the first filter screen 22 is located is an arc-shaped surface.

[0078] By making the plane containing the first filter 22 an arc-shaped surface, it is beneficial to increase the effective filtration area of ​​the first filter 22, thereby further increasing the fresh air volume of the air duct assembly 10.

[0079] Optionally, such as Figure 5 As shown, the plane where the second filter screen 23 is located is an arc-shaped surface.

[0080] By making the plane where the second filter 23 is located curved, it is beneficial to increase the effective filtration area of ​​the second filter 23, which in turn is beneficial to further increase the fresh air volume of the air duct assembly 10.

[0081] Optionally, the first filter screen 22 is disposed on at least one side of the second filter screen 23 in a first preset direction. In other words, the first filter screen 22 and the second filter screen 23 are arranged along the first preset direction. The first preset direction intersects with the thickness direction of the filtering device 2.

[0082] To make the technical solution of this disclosure easier to understand, the following description further illustrates the technical solution of this disclosure, taking the first preset direction being consistent with the left and right directions as an example. Wherein, the left and right directions are as follows... Figures 1 to 3 , Figure 5 and Figure 7 As shown.

[0083] For example, such as Figure 5 As shown, the number of first filter screens 22 is on both sides, with one first filter screen 22 located on the left side of the second filter screen 23 and the other first filter screen 22 located on the right side of the second filter screen 23.

[0084] By arranging the first filter screen 22 and the second filter screen 23 along a first preset direction, it is convenient to install and remove at least one of the first filter screen 22 and the second filter screen 23, thereby further facilitating the replacement of the first filter screen 22 and the second filter screen 23.

[0085] In other embodiments, the first filter 22 may be arranged around the second filter 23, or the second filter 23 may be arranged around the first filter 22.

[0086] Optionally, the second filter 23 is detachably connected to the mounting bracket 21. The mounting bracket 21 has a first mounting area and a first clearance portion 211 communicating with the first mounting area. The first clearance portion 211 is located on one side of the first mounting area in a first preset direction. The first mounting area is used to mount the second filter 23, and the first clearance portion 211 allows the second filter 23 to pass through.

[0087] Therefore, when installing and removing the second filter 23, the second filter 23 can be moved along the first preset direction, allowing it to pass through the first clearance portion 211 and move along the first preset direction to or from the first installation area. This further facilitates the installation and removal of the second filter 23, thereby further facilitating the replacement of the first filter 22 and the second filter 23.

[0088] In other embodiments, a mounting groove may be provided on the first mounting area, and the second filter screen 23 may be mounted in the mounting groove by deformation.

[0089] Optionally, the first installation area is provided with a first slide rail 212 extending along a first preset direction, and the second filter screen 23 is provided with a first mating part, which slidably engages with the first slide rail 212 along the first preset direction.

[0090] For example, such as Figure 5 As shown, the first installation area is provided with a first slide rail 212 extending in the left and right directions, and the first mating part is slidably mated with the first slide rail 212 in the left and right directions.

[0091] Therefore, when the second filter 23 moves along the first preset direction, the sliding engagement between the first mating part and the first slide rail 212 guides the movement of the second filter 23, allowing it to move along a predetermined path to or from the first installation area. This improves the efficiency of installing and removing the second filter 23, further facilitating the replacement of the first filter 22 and the second filter 23.

[0092] Optionally, the first slide rail 212 is a first slide groove, the first mating part is a first slider, and the first slider slides in conjunction with the first slide groove.

[0093] Optionally, the second filter 23 is connected to the mounting bracket 21 by a snap-fit.

[0094] When it is necessary to remove the second filter screen 23 from the mounting bracket 21, first disconnect the connection between the second filter screen 23 and the mounting bracket 21, and then move the second filter screen 23 along the first preset direction so that the second filter screen 23 is removed from the mounting bracket 21.

[0095] Optionally, such as Figure 5 As shown, the first filter screen 22 is disposed on both sides of the second filter screen 23 in a first preset direction. At least one of the first filter screens 22 is a spacer filter screen, which is disposed at a distance from the second filter screen 23 along the first preset direction. A first mounting area and a first clearance portion 211 are formed between the spacer filter screen and the second filter screen 23, and the first clearance portion 211 is disposed closer to the spacer filter screen in the first preset direction than the first mounting area.

[0096] For example, such as Figure 5 As shown, first filters 22 are provided on both the left and right sides of the second filter 23. The first filter 22 located on the left side of the second filter 23 is a spacer filter. The spacer filter and the second filter 23 are spaced apart in the left and right direction, and a first mounting area and a first clearance portion 211 are formed between the spacer filter and the second filter 23. The first clearance portion 211 is located on the left side of the first mounting area.

[0097] When installing the second filter 23, it can be moved from left to right, allowing it to pass through the first clearance portion 211 and move to the first mounting area. When removing the second filter 23, it can be moved from right to left, allowing it to pass through the first clearance portion 211 and move out of the first mounting area.

[0098] Therefore, when the first filter screen 22 is provided on both sides of the second filter screen 23, it is convenient to install and remove the second filter screen 23.

[0099] Optionally, such as Figures 7 to 9 As shown, a partition 3 is provided between the internal circulation duct 101 and the supply air duct. The partition 3 includes a first sealing element 31 and a second sealing element 32. The first sealing element 31 is disposed inside the housing 1; the second sealing element 32 is disposed on the mounting bracket 21 and is disposed between the first filter screen 22 and the second filter screen 23. The first sealing element 31 and the second sealing element 32 are in a sealing fit.

[0100] By designing the partition 3 as described above, the direct connection between the internal circulation duct 101 and the external circulation duct 102 can be effectively avoided, thereby preventing indoor air entering through the internal circulation duct 101 from flowing directly out of the air supply duct 103 without the filter device 2, which is beneficial to improving the fresh air quality of the duct assembly 10.

[0101] Optionally, the first sealing element 31 is a first sealing strip, and the second sealing element 32 is a second sealing strip. The second sealing strip is disposed on one side of the first sealing strip in a first preset direction, and the first sealing strip abuts against the second sealing strip along the first preset direction.

[0102] By using the first sealing element 31 as the first sealing strip and the second sealing element 32 as the second sealing strip, with the first sealing strip abutting against the second sealing strip along a first preset direction, a sealing fit between the first sealing element 31 and the second sealing element 32 is achieved. This results in a larger contact area between the first sealing element 31 and the second sealing element 32, which is beneficial to improving the sealing performance between them and further improving the fresh air quality of the air duct assembly 10.

[0103] Optionally, such as Figure 4 As shown, the housing 1 has a second mounting area 14 and a second clearance portion 15 communicating with the second mounting area 14. The second clearance portion 15 is located on one side of the second mounting area 14 in a first preset direction. The second mounting area 14 is used to mount the filter device 2, and the second clearance portion 15 allows the filter device 2 to pass through.

[0104] For example, such as Figure 4As shown, the second mounting area 14 is located on the left side of the second clearance portion 15. When the filter device 2 moves from left to right, it can move out of the second mounting area 14 and through the second clearance portion 15; when the filter device 2 moves from right to left, it can move into the second mounting area 14 through the second clearance portion 15.

[0105] like Figures 7 to 9 As shown, the first filter screen 22 is disposed on both sides of the second filter screen 23 in a first preset direction, and a second sealing strip is provided between each first filter screen 22 and the second filter screen 23. The first sealing strip and the second sealing strip correspond one-to-one, and the second sealing strip is disposed closer to the second clearance part 15 in the first preset direction relative to the first sealing strip it corresponds to.

[0106] In this configuration, among two adjacent first sealing strips, the height of the first sealing strip located closer to the second clearance portion 15 is less than the height of the first sealing strip located farther from the second clearance portion 15. Similarly, among two adjacent second sealing strips, the height of the second sealing strip located closer to the second clearance portion 15 is greater than the height of the second sealing strip located farther from the second clearance portion 15. The height of the first sealing strip refers to its dimension in the direction perpendicular to the thickness of the filter device 2; the height of the second sealing strip refers to its dimension in the direction perpendicular to the thickness of the filter device 2.

[0107] like Figure 8 and Figure 9 As shown, the height of the first sealing strip on the left side is greater than the height of the first sealing strip on the right side, and the height of the second sealing strip on the left side is less than the height of the second sealing strip on the right side.

[0108] Therefore, when the filter device 2 is moved in the direction away from the second installation area, the first sealing strip will not interfere with the second sealing strip; when the filter device 2 is moved in the direction away from the second installation area, the first sealing strip will not interfere with the non-corresponding second sealing strip, and when the filter device 2 is completely moved into the second installation area, the second sealing strip stops against the corresponding first sealing strip, so that the second sealing strip and the corresponding first sealing strip are sealed together.

[0109] The above design not only improves the sealing performance between the second seal 32 and the first seal 31, but also allows us to determine whether the filter device 2 is installed correctly by checking whether the second seal 32 abuts against the first seal 31.

[0110] Optionally, such as Figure 4As shown, the housing 1 has a mounting cavity 16, and the housing 1 has a clearance hole 17 communicating with the mounting cavity 16. The mounting cavity 16 is connected to the internal circulation air duct 101, the external circulation air duct 102, and the air supply air duct 103. The clearance hole 17 is located on one side of the mounting cavity 16 in a second preset direction. The mounting cavity 16 is used to mount the filter device 2, and the clearance hole 17 allows the filter device 2 to pass through. The second preset direction is consistent with the first preset direction mentioned above. The area where the mounting cavity 16 is located forms the second mounting area 14, and the clearance hole 17 forms the second clearance portion 15.

[0111] Therefore, when installing the filter device 2, it can be moved from left to right, allowing it to pass through the clearance hole 17 and move into the mounting cavity 16. When disassembling the filter device 2, it can be moved from right to left, allowing it to pass through the clearance hole 17 and be removed from the mounting cavity 16. This facilitates the installation and disassembly of the filter device 2, and further facilitates its cleaning or replacement.

[0112] Optionally, the mounting cavity 16 is provided with a second slide rail 161 extending in a second preset direction, and the filter device 2 is provided with a second mating part, which is slidably mated with the second slide rail 161 in a second preset direction.

[0113] For example, such as Figure 4 As shown, the mounting cavity 16 is provided with a second slide rail 161 extending in the left and right directions, and the second mating part is slidably mated with the second slide rail 161 in the left and right directions.

[0114] Therefore, when the filter device 2 is moved along the second preset direction, the sliding engagement between the second mating part and the second slide rail 161 guides the movement of the filter device 2, allowing it to move along the set path to or from the mounting cavity 16. This improves the efficiency of installing and removing the filter device 2, further facilitating its replacement or cleaning.

[0115] Optionally, the second slide rail 161 is a second slide groove, the second mating part is a second slider, and the second slider slides in a sliding fit with the second slide groove.

[0116] Optionally, such as Figure 5As shown, a second slide rail 161 is provided on each of the opposite sides of the mounting cavity 16. The mounting bracket 21 has a first frame 213 and a second frame 214 arranged opposite to each other. A second mating part is provided on the side of the first frame 213 facing away from the second frame 214 and on the side of the second frame 214 facing away from the first frame 213. The second mating part located on the same side of the filter device 2 slides in contact with the second slide rail 161. The arrangement direction of the first frame 213 and the second frame 214 intersects both the thickness direction and the first preset direction of the filter device 2.

[0117] To make the technical solution of this disclosure easier to understand, the following example illustrates the technical solution of this disclosure by taking the arrangement direction of the first border 213 and the second border 214 as being consistent with the vertical direction. Wherein, the vertical direction is as follows... Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown.

[0118] like Figure 5 As shown, the first frame 213 is located below the second frame 214. The cavity wall of the mounting cavity 16 located above the filter device 2 and the cavity wall of the mounting cavity 16 located below the filter device 2 are both provided with second slide rails 161. Specifically, the second mating part located on the first frame 213 mates with the first slide rail 212 located on the lower side of the filter device 2, and the second mating part located on the second frame 214 mates with the first slide rail 212 located on the upper side of the filter device 2.

[0119] Optionally, the filter device 2 is connected to the housing 1 by a snap-fit ​​connection.

[0120] When it is necessary to remove the filter device 2 from the housing 1, first disconnect the filter device 2 from the housing 1, and then move the filter device 2 along the first preset direction so that the filter device 2 is moved out of the mounting cavity 16 of the housing 1.

[0121] Optionally, such as Figure 7 and Figure 10 As shown, a sealing plate 24 is provided on the side of the filter device 2 near the clearance hole 17, and the sealing plate 24 is used to seal the clearance hole 17. The hole wall of the clearance hole 17 has a housing sealing part 171, and the sealing plate 24 has a plate sealing part 2431, which is sealed and fitted with the housing sealing part 171.

[0122] By using the sealing part 2431 of the plate and the sealing part 171 of the housing to seal the hole 17, the clearance hole 17 can be blocked, thereby preventing the airflow in the internal circulation duct 101 or the external circulation duct 102 from leaking at the clearance hole 17. That is, the airflow in the internal circulation duct 101 or the external circulation duct 102 flows out directly from the clearance hole 17 without being filtered by the filter device 2, which is beneficial to improving the fresh air quality of the duct assembly 10.

[0123] Optionally, such as Figure 10 As shown, the housing sealing part 171 is the first stop, and the plate sealing part 2431 is the second stop, and the second stop and the first stop are sealed together.

[0124] By setting the housing sealing part 171 as the first stop and the plate sealing part 2431 as the second stop, the sealing performance at the clearance hole 17 is improved by using the second stop to seal with the first stop, which is beneficial to further improve the fresh air quality of the air duct assembly 10.

[0125] Optionally, such as Figure 10 As shown, the sealing plate 24 is a Z-shaped plate, and the sealing plate 24 includes a first plate body 241, a second plate body 242 and a third plate body 243 connected in sequence. The third plate body 243 is located closer to the clearance hole 17 than the first plate body 241. The third plate body 243 has a notch so that the third plate body 243 forms a handle 2432.

[0126] By providing a handle 2432 on the sealing plate 24, the user can hold the filter device 2 by the handle 2432 when installing or removing it, further facilitating the installation and removal of the filter device 2. In addition, the handle 2432 is formed by a notch on the third plate 243. Compared with a handle directly provided on the sealing plate 24 and protruding from the clearance hole 17, this can effectively reduce the space occupied by the filter device 2, thereby helping to reduce the space occupied by the air duct assembly 10 and improve the appearance of the air duct assembly 10.

[0127] Optionally, the housing 1 is provided with a third seal 18, and the filter device 2 is provided with a fourth seal 203. The fourth seal 203 is disposed closer to the sealing plate 24 relative to the first filter area 201 and the second filter area 202, and the fourth seal 203 is sealed and fitted with the third seal 18.

[0128] The use of the fourth seal 203 in conjunction with the third seal 18 improves the sealing performance at the clearance hole 17, thereby further improving the fresh air quality of the duct assembly 10.

[0129] Optionally, the third sealing element 18 is a third sealing strip, and the fourth sealing element 203 is a fourth sealing strip. The fourth sealing strip is disposed on one side of the third sealing strip in the second preset direction, and the fourth sealing strip abuts against the third sealing strip in the second preset direction.

[0130] By using the third sealing element 18 as the third sealing strip and the fourth sealing element 203 as the fourth sealing strip, with the third sealing strip abutting against the fourth sealing strip along a second preset direction, a sealing fit between the third sealing element 18 and the fourth sealing element 203 is achieved. This results in a larger contact area between the third sealing element 18 and the fourth sealing element 203, which is beneficial to improving the sealing performance between them and further improving the fresh air quality of the air duct assembly 10.

[0131] Optionally, the sealing plate 24 is positioned closer to the clearance hole than the fourth sealing strip. The height of the third sealing strip is greater than the height of the housing sealing part 171, and the height of the fourth sealing strip is less than the height of the sealing plate 24.

[0132] The height of the third sealing strip refers to its dimension in the direction perpendicular to the thickness of the filter device 2. The height of the fourth sealing strip refers to its dimension in the direction perpendicular to the thickness of the filter device 2. The height of the sealing plate 24 refers to its dimension in the direction perpendicular to the thickness of the filter device 2; the housing sealing part 171 refers to its dimension in the direction perpendicular to the thickness of the filter device 2.

[0133] like Figure 7 and Figure 10 As shown, the fourth sealing strip is located on the left side of the sealing plate 24.

[0134] Therefore, when the filter device 2 is moved in the direction opposite to the mounting cavity 16, the fourth sealing strip will not interfere with the housing sealing part 171; when the filter device 2 is moved in the direction opposite to the mounting cavity 16, the fourth sealing strip will not interfere with the housing sealing part 171, and when the filter device 2 is completely moved into the mounting cavity 16, the fourth sealing strip stops against the corresponding third sealing strip, and the plate sealing part 2431 of the sealing plate 24 seals with the housing sealing part 171.

[0135] The above design not only improves the sealing performance between the third seal 18 and the fourth seal 203, as well as between the plate seal 2431 and the housing seal 171, but also allows the filter device 2 to be judged as to whether it is installed in place by whether the fourth seal 203 abuts against the third seal 18 and whether the plate seal 2431 abuts against the housing seal 171.

[0136] Optionally, the height of the third sealing strip is less than the height of the first sealing strip, and the height of the fourth sealing strip is greater than the height of the second sealing strip.

[0137] Optionally, such as Figures 1 to 3As shown, the housing 1 includes an inner circulation frame 11 and an outer circulation frame 12, with the outer circulation frame 12 detachably connected to the inner circulation frame 11. The inner circulation frame 11 and the partition 3 form an inner circulation duct 101, and the inner circulation frame 11 and the partition 3 form a supply air duct 103, with the inner circulation duct 101 positioned on one side of the supply air duct 103 in a first predetermined direction. The outer circulation frame 12 forms an outer circulation duct 102, or the outer circulation frame 12 and the inner circulation frame 11 form an outer circulation duct 102. The filter device 2 is detachably connected to at least one of the inner circulation frame 11 and the outer circulation frame 12.

[0138] This simplifies the structure of individual components and facilitates mass production of the air duct assembly 10. Furthermore, the internal circulation frame 11 and external circulation frame 12 can be designed according to the characteristics of the internal circulation air duct 101 and external circulation air duct 102, respectively.

[0139] Optionally, such as Figure 4 and Figure 6 As shown, the inner circulation frame 11 has a first port 1114 and a second port 1115. The first port 1114 is positioned towards the filter device 2, and the second port 1115 forms the outlet end of the air supply duct 103. The outer circulation frame 12 has a third port 121, which is positioned towards the filter device 2 and is connected to the first port 1114.

[0140] Optionally, such as Figure 3 and Figure 4 As shown, the first filter 22 is disposed on both sides of the second filter 23 in a first preset direction, and the internal circulation air duct 101 is disposed on both sides of the air supply duct 103 in the first preset direction. The internal circulation frame 11 includes a middle part 1111 and side parts 1112 disposed on both sides of the middle part 1111 in the first preset direction. A partition 3 is provided between each side part 1112 and the middle part 1111. The side parts 1112 and the partition 3 form the internal circulation air duct 101, and the middle part 1111 and the partition 3 form the air supply duct 103.

[0141] For example, such as Figure 3 As shown, the internal circulation air duct 101 is located on the left and right sides of the air supply duct 103. The side portion 1112 is located on the left and right sides of the middle portion 1111.

[0142] Therefore, indoor air can enter the air duct assembly 10 through the internal circulation air ducts 101 located on the left and right sides of the air supply duct 103, which helps to further increase the fresh air volume of the air duct assembly 10.

[0143] Optionally, the inner circulation frame 11 is arranged symmetrically along a first preset direction.

[0144] Optionally, the inner circulation frame 11 includes a main body 111 and an inlet 112, the inlet 112 being detachably connected to the main body 111, and the main body 111 being detachably connected to the outer circulation frame 12.

[0145] Optionally, the main body 111 is connected to the outer circulation frame 12 by a snap-fit ​​connection.

[0146] Optionally, the inlet portion 112 is connected to the main body portion 111 by a snap-fit ​​connection.

[0147] Optionally, an air inlet damper 13 is provided inside the inlet section 112.

[0148] Optionally, the side portions 1112 protrude from the middle portion 1111 in the thickness direction of the filter device 2 toward the direction opposite to the external circulation frame 12. The middle portion 1111 and the side portions 1112 located on both sides of the middle portion 1111 in a first preset direction form an installation space 1113. The air duct assembly 10 also includes a fan 4, which is located within the installation space 1113, with the inlet of the fan 4 corresponding to the outlet end of the air supply duct 103.

[0149] This makes the layout of the housing 1 and the fan 4 more compact, which helps to reduce the overall volume of the air duct assembly 10.

[0150] Optionally, the air duct assembly 10 also includes a fresh air duct 6, which is connected to the inlet end of the external circulation air duct 102.

[0151] Optionally, the air duct assembly 10 also includes a health module 5, which is connected to the outlet of the fan 4. The health module 5 has a fresh air outlet 51 for the airflow that flows in through the fan 4 to flow out.

[0152] The air duct assembly 10 of this embodiment allows for the replacement or cleaning of the first filter screen 22 and the second filter screen 23 through a single disassembly, making the replacement or cleaning of the filter device 2 more convenient and having less impact on the appearance.

[0153] like Figures 11 to 13 As shown, the air conditioner 100 of this embodiment includes the air duct assembly 10 of any of the above embodiments.

[0154] Since the air duct assembly 10 of the present disclosure has advantages such as easy disassembly and assembly of the filter device 2, the air conditioner 100 of the present disclosure has advantages such as easy maintenance.

[0155] Optionally, such as Figure 13As shown, the air conditioner 100 includes a casing, and the air duct assembly 10 is disposed inside the casing. The casing includes a panel 20, a front casing 30, a rear casing 40, and a base 50. The panel 20 is disposed below and connected to the front casing 30; the rear casing 40 is disposed behind the panel 20 and the front casing 30, and both the panel 20 and the front casing 30 are connected to the rear casing 40; the base 50 is disposed below the panel 20 and the rear casing 40, and both the panel 20 and the rear casing 40 are connected to the base 50. The panel 20 has a casing air inlet 201 and a casing air outlet 202. The casing air inlet 201 is disposed at the inlet end of the internal circulation air duct 101 and is connected to the inlet end of the internal circulation air duct 101; the casing air outlet 202 is disposed at the fresh air outlet 51 and is connected to the fresh air outlet 51.

[0156] Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the scope of protection of the present disclosure.

Claims

1. A duct assembly, characterized in that, include: The housing has an internal circulation duct, an external circulation duct, and an air supply duct. The inlet end of the internal circulation duct is used to introduce indoor air, and the inlet end of the external circulation duct is used to introduce outdoor air. and A filtration device is detachably connected to the housing. The filtration device includes a first filtration zone and a second filtration zone. The outlet end of the internal circulation duct is set corresponding to the first filtration zone. The outlet end of the external circulation duct is set corresponding to the first filtration zone and the second filtration zone. The inlet end of the air supply duct is set corresponding to the second filtration zone. The outlet end of the internal circulation duct and the air supply duct are located on the same side of the thickness direction of the filter device, and the external circulation duct is located on the other side of the thickness direction of the filter device. The internal circulation duct is connected to the air supply duct through the external circulation duct. The filtration device includes a mounting bracket; and A first filter screen and a second filter screen, both of which are mounted on the mounting bracket; The area where the first filter screen is located forms the first filtration zone, and the area where the second filter screen is located forms the second filtration zone. The first filter screen is disposed on at least one side of the second filter screen in a first preset direction; Wherein, the first preset direction intersects with the thickness direction of the filter device.

2. The air duct assembly according to claim 1, characterized in that, The mounting bracket is detachably connected to the housing; at least one of the first filter and the second filter is detachably connected to the mounting bracket.

3. The air duct assembly according to claim 2, characterized in that, The second filter screen is detachably connected to the mounting bracket; The mounting bracket has a first mounting area and a first clearance portion communicating with the first mounting area. The first clearance portion is located on one side of the first mounting area in the first preset direction. The first mounting area is used to install the second filter screen, and the first clearance portion allows the second filter screen to pass through.

4. The air duct assembly according to claim 3, characterized in that, The first filter screen is disposed on both sides of the second filter screen in a first preset direction. At least one of the first filter screens is a spacer filter screen. The spacer filter screen and the second filter screen are spaced apart along the first preset direction. A first mounting area and a first clearance portion are formed between the spacer filter screen and the second filter screen. The first clearance portion is disposed closer to the spacer filter screen than the first mounting area in the first preset direction; and / or The first installation area is provided with a first slide rail extending along the first preset direction, and the second filter screen is provided with a first mating part, which slidably engages with the first slide rail along the first preset direction.

5. The air duct assembly according to claim 1, characterized in that, A partition is provided between the internal circulation duct and the supply air duct, the partition comprising: A first seal, wherein the first seal is disposed within the housing; and A second seal is disposed on the mounting bracket and between the first filter screen and the second filter screen; The first seal and the second seal are in a sealing fit.

6. The air duct assembly according to claim 5, characterized in that, The first sealing element is a first sealing strip, and the second sealing element is a second sealing strip. The second sealing strip is disposed on one side of the first sealing strip in the first preset direction, and the first sealing strip abuts against the second sealing strip along the first preset direction.

7. The air duct assembly according to claim 6, characterized in that, The housing is provided with a second mounting area and a second clearance portion communicating with the second mounting area. The second clearance portion is located on one side of the second mounting area in the first preset direction. The second mounting area is used to install the filter device, and the second clearance portion allows the filter device to pass through. The first filter screen is disposed on both sides of the second filter screen in a first preset direction. A second sealing strip is provided between each of the first filter screen and the second filter screen. The first sealing strip and the second sealing strip correspond one-to-one. The second sealing strip is disposed closer to the second clearance part in the first preset direction than the first sealing strip corresponding to it. Among two adjacent first sealing strips, the height of the first sealing strip located closer to the second clearance portion is less than the height of the first sealing strip located farther from the second clearance portion; In two adjacent second sealing strips, the height of the second sealing strip located closer to the second clearance portion is greater than the height of the second sealing strip located farther from the second clearance portion.

8. The air duct assembly according to claim 1, characterized in that, The housing has an installation cavity and a clearance hole communicating with the installation cavity. The installation cavity is connected to the internal circulation duct, the external circulation duct, and the air supply duct. The clearance hole is located on one side of the installation cavity in a second preset direction. The installation cavity is used to install the filter device, and the clearance hole allows the filter device to pass through. The second preset direction intersects with the thickness direction of the filter device.

9. The air duct assembly according to claim 8, characterized in that, The mounting cavity is provided with a second slide rail extending along the second preset direction, and the filter device is provided with a second mating part, which slidably engages with the second slide rail along the second preset direction.

10. The air duct assembly according to claim 8, characterized in that, The filter device is provided with a sealing plate on the side near the clearance hole, and the sealing plate is used to seal the clearance hole; The wall of the clearance hole has a housing sealing part, and the sealing plate has a plate sealing part, which is sealed in conjunction with the housing sealing part.

11. The air duct assembly according to claim 10, characterized in that, The housing sealing portion is a first stop, and the plate sealing portion is a second stop, the second stop being in a sealing fit with the first stop; and / or The sealing plate is a Z-shaped plate, and the sealing plate includes a first plate body, a second plate body and a third plate body connected in sequence. The third plate body is located closer to the avoidance hole than the first plate body. The third plate body has a notch so that the third plate body can form a handle.

12. The air duct assembly according to claim 10, characterized in that, The housing is equipped with a third sealing element; The filtration device is provided with a fourth sealing element, which is located closer to the sealing plate than the first filtration area and the second filtration area, and the fourth sealing element is sealed in conjunction with the third sealing element.

13. The air duct assembly according to claim 12, characterized in that, The third sealing element is a third sealing strip, and the fourth sealing element is a fourth sealing strip. The fourth sealing strip is disposed on one side of the third sealing strip in the second preset direction, and the fourth sealing strip abuts against the third sealing strip along the second preset direction.

14. The air duct assembly according to claim 13, characterized in that, The sealing plate is positioned closer to the clearance hole than the fourth sealing strip; The height of the third sealing strip is greater than the height of the housing sealing part, and the height of the fourth sealing strip is less than the height of the sealing plate.

15. The air duct assembly according to any one of claims 2-7, characterized in that, The first filter screen is a single-layer filter screen, and the second filter screen is a HEPA filter screen; and / or The plane containing the first filter screen is an arc-shaped surface; and / or The plane on which the second filter screen is located is an arc-shaped surface.

16. The air duct assembly according to any one of claims 1-4, characterized in that, The housing includes: Internal circulation frame; and An outer circulation frame, which is detachably connected to the inner circulation frame; The internal circulation duct and the air supply duct are separated by a partition. The internal circulation frame and the partition form the internal circulation duct, and the internal circulation frame and the partition form the air supply duct. The internal circulation duct is located on one side of the air supply duct in the first preset direction. The outer circulation frame forms the outer circulation air duct, or the outer circulation frame and the inner circulation frame together form the outer circulation air duct; The filtration device is detachably connected to at least one of the inner circulation frame and the outer circulation frame.

17. The air duct assembly according to claim 16, characterized in that, The first filter screen is disposed on both sides of the second filter screen in the first preset direction, and the internal circulation air duct is disposed on both sides of the air supply air duct in the first preset direction; The inner circulation frame includes a middle part and side parts located on both sides of the middle part in the first preset direction, and each side part and the middle part are provided with the partition. The side portion and the partition form the internal circulation air duct, and the middle portion and the partition form the air supply air duct.

18. The air duct assembly according to claim 17, characterized in that, The side portion protrudes from the middle portion in the thickness direction of the filter device in the direction away from the outer circulation frame, and the middle portion and the side portions located on both sides of the middle portion in the first preset direction form an installation space. The air duct assembly also includes a fan, which is located within the installation space, with the fan inlet positioned corresponding to the outlet end of the air supply duct.

19. The air duct assembly according to any one of claims 1-14, characterized in that, The inlet end of the internal circulation duct and the inlet end of the external circulation duct are arranged opposite each other along the thickness direction of the filter device.

20. A filtration device, characterized in that, The filtration device is the filtration device according to any one of claims 1-15.

21. An air conditioner, characterized in that, The air duct assembly included in any one of claims 1-19.

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