Filter assembly, indoor unit and air conditioner

Abstract

The invention provides a filter assembly, an indoor unit and an air conditioner, and relates to the technical field of air conditioners. The filter assembly comprises a filter screen without an adsorption function and a framework with an adsorption function, the framework comprises a frame body, a mounting opening is defined by the frame body, and the filter screen is arranged at the mounting opening in a matched mode. The indoor unit comprises a shell and the filter assembly, the shell is provided with an air inlet, and the frame body of the filter assembly is connected to the shell and corresponds to the air inlet. The air conditioner comprises an outdoor unit and the indoor unit, and the indoor unit and the outdoor unit are communicated through a refrigerant pipe to form refrigerant circulation. The filtering assembly is good in airflow filtering effect, the filter screen is not prone to being blocked, the air inlet amount of the indoor unit can be ensured, and therefore the temperature adjusting efficiency of the indoor unit and the use comfort of a user are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a filter component, an indoor unit and an air conditioner. Background Art

[0002] Air conditioners are widely used for temperature regulation of indoor environments. A filter is generally provided at the air inlet of an existing indoor unit to filter the airflow entering the air duct, so as to reduce the blockage and damage to the air duct components caused by impurities and dust in the airflow, as well as the adverse effects on its heat exchange efficiency. However, the existing filter, especially some filters that use adsorbent materials to improve the filtering effect of impurities and dust in the airflow, are easily blocked by impurities during use, resulting in a low air intake, thereby affecting the temperature regulation efficiency of the indoor unit for the indoor environment and reducing the user's comfort. Summary of the invention

[0003] The purpose of the present invention includes providing a filter assembly, an indoor unit and an air conditioner to solve the technical problem that the existing filter is easily blocked by impurities during use, resulting in low air intake, thereby affecting the temperature regulation efficiency of the indoor unit for the indoor environment and reducing the user's comfort.

[0004] To solve the above problems, the present invention provides a filter assembly, including a filter screen without adsorption function and a frame with adsorption function, wherein the frame includes a frame body, the frame body surrounds an installation opening, and the filter screen is matched and arranged in the installation opening.

[0005] When the filter assembly provided by the present invention is applied to an indoor unit, the frame and filter screen of the filter assembly are blocked at the air inlet. When the air flows through the air inlet, it needs to be filtered and adsorbed by the filter assembly before it can flow into the shell. Specifically, when the air flows through the filter assembly, the air flow corresponding to the filter screen area flows through the filter screen, and the filter screen can block the impurities and dust in the air flow body that are larger than the filter holes on its outside. After filtering, the relatively clean air flow flows into the shell through the mesh holes of the filter screen, thereby improving the cleanliness of the air flow, reducing the blocking and pollution of the air duct assembly caused by impurities and dust in the air flow flowing through the air duct, ensuring the normal operation of the air duct assembly, and improving the user's comfort; at the same time, the air flow corresponding to the skeleton area directly collides and contacts with the skeleton, and the skeleton with adsorption effect can adsorb the impurities and dust in the air flow body, and the relatively clean air flow after adsorption turns to flow into the shell through the mesh holes of the filter screen. , the skeleton can assist the filter to adsorb and filter impurities and dust in the air flow, thereby improving the filtering effect of the filter component and reducing the filtering load of the filter, correspondingly reducing the degree of impurity blocking at the filter, extending its service life and increasing its air intake, thereby ensuring the temperature regulation effect of the indoor unit on the indoor environment; in addition, during use, since the filter only has a blocking and filtering effect on the airflow but not an adsorption effect, the impurities and dust blocked on the outside of the filter are in relatively active contact with the filter, and the frame surrounding the filter has a better adsorption effect on impurities and dust. Accordingly, the impurities and dust in the filter area close to the frame can move and be adsorbed on the frame under the adsorption effect of the frame, thereby further reducing the blocking degree of the filter, and on the basis of ensuring that the filter component effectively filters the airflow, further increasing the effective air intake of the filter, and correspondingly further improving the temperature regulation efficiency of the indoor unit and the user's comfort.

[0006] Optionally, the skeleton comprises a matrix and the matrix is ​​doped with adsorption particles;

[0007] Or, the skeleton is made of nano-anion material or the skeleton comprises a base frame and a nano-anion adsorption layer coated on the outer wall of the base frame;

[0008] Alternatively, the skeleton is made of activated carbon fibers.

[0009] Optionally, the frame further includes an extension plate, and a first end of the extension plate is connected to an outer wall of the frame, and a second end of the extension plate extends away from the frame.

[0010] Optionally, the extension plate is provided with ventilation holes.

[0011] Optionally, the hole section at at least one end of the ventilation hole is a flared hole section.

[0012] Optionally, the extension plate is provided with grooves and / or protrusions.

[0013] Optionally, the frame body includes a rectangular frame, multiple first support bars and multiple second support bars, two opposite frame bars of the frame are first frame bars, and the other two opposite frame bars are second frame bars, multiple first support bars are connected between two first frame bars and are arranged at intervals along the length direction of the first frame bars, and multiple second support bars are connected between two second frame bars and are arranged at intervals along the length direction of the second frame bars.

[0014] Optionally, the frame further includes extension plates, the number of which is equal to the sum of the first support bars and the second surrounding frame bars, and the plurality of extension plates are connected to the first support bars and the second surrounding frame bars in a one-to-one correspondence.

[0015] Optionally, the second frame bar and the first support bar are arranged at equal intervals along the length direction of the first frame bar, and the arrangement interval is L; the plate surface of the extension plate is perpendicular to the contour surface surrounded by the frame body, and the extension height of the extension plate is H, H≥1 / 2L.

[0016] The present invention further provides an indoor unit, comprising a shell and the above-mentioned filter assembly, wherein the shell is provided with an air inlet, and a frame of the filter assembly is connected to the shell and corresponds to the air inlet.

[0017] The present invention also provides an air conditioner, comprising an outdoor unit and the indoor unit, wherein the indoor unit is connected to the outdoor unit via a refrigerant pipe to form a refrigerant circulation.

[0018] The air conditioner provided by the present invention adopts the above-mentioned filter assembly, wherein the filter of the filter assembly can filter the airflow, and the skeleton can adsorb and filter impurities and dust mixed in the airflow, thereby effectively improving the cleanliness of the airflow flowing into the shell, reducing the blockage and pollution of the air duct assembly caused by impurities and dust in the air flow flowing through the air duct, ensuring the normal operation of the air duct assembly, and improving the user's comfort; at the same time, the setting of the skeleton can also adsorb impurities blocked on the filter close to it, thereby effectively reducing the filtration load of the filter and reducing the blockage degree of the filter, on the basis of ensuring that the filter assembly effectively filters the airflow, further improving the effective air intake of the filter, and correspondingly further improving the temperature regulation efficiency of the indoor unit and the user's comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 An axonometric diagram of the indoor unit provided by the present invention;

[0021] Figure 2 An exploded diagram of the indoor unit provided by the present invention;

[0022] Figure 3 A partial cross-sectional view of the filter assembly provided by the present invention in which an extension plate is provided with ventilation holes.

[0023] Description of reference numerals:

[0024] 10-filter assembly; 20-housing; 21-air inlet; 100-filter; 200-skeleton; 210-frame; 211-installation port; 212-enclosing frame; 212a-first enclosing frame bar; 212b-second enclosing frame bar; 213-first support bar; 214-second support bar; 220-extension plate; 221-vent; 221a-expanded hole section; 221b-straight hole section. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] This embodiment provides a filter assembly 10, such as Figure 1 and Figure 2 As shown, it includes a filter screen 100 without adsorption function and a frame 200 with adsorption function. The frame 200 includes a frame body 210 . The frame body 210 surrounds an installation opening 211 . The filter screen 100 is matched and arranged in the installation opening 211 .

[0027] This embodiment also provides an indoor unit, such as Figure 1 and Figure 2 As shown, it includes a shell 20 and the above-mentioned filter assembly 10 , the shell 20 is provided with an air inlet 21 , and the frame 210 of the filter assembly 10 is connected to the shell 20 and corresponds to the air inlet 21 .

[0028] The present embodiment provides a filter assembly 10 and an indoor unit, wherein the filter assembly 10 includes a filter 100 for filtering impurities and dust in an air flow and a frame 200 for supporting the filter 100 and absorbing impurities and dust in the air flow; wherein the indoor unit includes a shell 20 for forming an air duct internally and the above-mentioned filter assembly 10 for filtering the air inlet 21 of the air duct.

[0029] When in use, the frame 210 and the filter screen 100 of the filter assembly 10 are separated at the air inlet 21. When the airflow flows through the air inlet 21, it needs to be filtered and adsorbed by the filter assembly 10 before it can flow into the shell 20. Specifically, when the airflow flows through the filter assembly 10, the airflow corresponding to the area of ​​the filter screen 100 flows through the filter screen 100. The filter screen 100 can block the impurities and dust in the airflow that are larger than the filter holes on the outside. After filtration, the relatively clean airflow flows into the shell 20 through the mesh of the filter screen 100. The frame 200 is provided with a plurality of air filters 200, and the air filter 100 is provided with a plurality of air filters 200. The air filter 1 ... The filter 100 is assisted to adsorb and filter impurities and dust in the air flow, thereby improving the filtering effect of the filter assembly 10 and reducing the filtering load of the filter 100, correspondingly reducing the degree of impurity blocking at the filter 100, extending its service life and increasing its air intake, thereby ensuring the temperature regulation effect of the indoor unit on the indoor environment; in addition, during use, since the filter 100 only has a blocking and filtering effect on the airflow but does not have an adsorption effect, the impurities and dust blocked on the outside of the filter 100 are in relatively movable contact with the filter 100, and the frame 210 surrounding the filter 100 has a better adsorption effect on impurities and dust. Accordingly, the impurities and dust in the area of ​​the filter 100 close to the frame 210 can move and be adsorbed on the frame 210 under the adsorption effect of the frame 210, thereby further reducing the blocking degree of the filter 100, and on the basis of ensuring that the filter assembly 10 effectively filters the airflow, further increasing the effective air intake of the filter 100, and correspondingly further improving the temperature regulation efficiency of the indoor unit and the user's comfort.

[0030] Specifically, in this embodiment, the skeleton 200 may include a matrix and the matrix is ​​doped with adsorption particles. This is one specific form of the skeleton 200 with adsorption effect, wherein the matrix may be made of a plastic material that does not have adsorption effect, and the matrix is ​​doped with adsorption particles with adsorption effect, such as calcium magnesium silicate particles or other adsorption particles that have adsorption effect on impurities and dust, so that the entire skeleton 200 has adsorption effect on impurities and dust. Among them, when the adsorption particles are calcium magnesium silicate particles, they have both physical adsorption and chemical adsorption, and have better adsorption effect on impurities and dust.

[0031] In addition to the above-mentioned method of directly adding adsorption particles to the existing skeleton 200 material to make the skeleton 200 have an adsorption effect, in this embodiment, the skeleton 200 can also be made of nano negative ion material. Specifically, the nano negative ion material itself can generate negative ions to adsorb impurities and dust; similarly, the skeleton 200 can also include a base frame and a nano negative ion adsorption layer coated on the outer wall of the base frame. The base frame can be made of plastic material that does not have an adsorption effect, and the nano negative ion adsorption layer with adsorption effect is coated on the outer wall of the frame, so that the entire skeleton 200 has an adsorption effect on impurities and dust.

[0032] In addition, the skeleton 200 may also be made of activated carbon fibers. Activated carbon fibers have a large specific surface area and can adsorb surrounding impurities and dust through the action of van der Waals force.

[0033] Of course, in other embodiments, the skeleton 200 may also be in any other form that can adsorb impurities and dust.

[0034] Specifically, in this embodiment, Figure 1 and Figure 2As shown, the frame 210 includes a rectangular frame 212, a plurality of first support bars 213 and a plurality of second support bars 214, two of the opposite frame bars of the frame 212 are first frame bars 212a, and the other two opposite frame bars are second frame bars 212b, the plurality of first support bars 213 are all connected between the two first frame bars 212a and are arranged at intervals along the length direction of the first frame bars 212a, and the plurality of second support bars 214 are all connected between the two second frame bars 212b and are arranged at intervals along the length direction of the second frame bars 212b. The entire frame 210 is in the form of a rectangular grid with a regular shape. The adjacent first support bars 213, the second support bars 214, the first frame bars 212a and the second frame bars 212b together form a plurality of installation openings 211, and each installation opening 211 is provided with a filter screen 100. The frame 210 is configured in the above-mentioned form. On the one hand, it is easier to ensure the shape accuracy during processing, and the processing convenience is correspondingly improved. Specifically, the frame 212, the first support bars 213 and the second support bars 214 can be integrally formed, and the intersection of the first support bars 213 and the second support bars 214 is integral, so as to further improve the processing convenience of the frame 210 and ensure the frame 212, the first support bars 213 and The second support bar 214 has a strong connection and a bearing strength for the filter 100; on the other hand, the frame 212 is arranged around the periphery of the filter 100, and the first support bar 213 and the second support bar 214 are cross-distributed in various areas of the filter 100. When in use, the frame 212, the first support bar 213 and the second support bar 214 can adsorb impurities and dust on the filter 100 in the vicinity thereof, and accordingly can adsorb multiple areas of the filter 100 comprehensively, thereby comprehensively adsorbing dust and reducing blockage in various areas of the filter 100, so that the air intake of all areas of the filter 100 is better, reducing the occurrence of severe local blockage of the filter 100 and making it impossible to ventilate, thereby reducing its air intake.

[0035] Optionally, in this embodiment, if Figure 1 and Figure 2As shown, the frame 200 may further include an extension plate 220 , and a first end of the extension plate 220 is connected to the outer wall of the frame 210 , and a second end of the extension plate 220 extends away from the frame 210 . When the frame is installed on the air inlet 21, it is approximately parallel to the air inlet 21. The first end of the extension plate 220 is connected to the frame 210 and is cross-arranged on the outside of the air inlet 21 and the frame 210 relative to the air inlet 21. The first end of the extension plate 220 will not cause additional shielding to the filter 100. At the same time, the extension plate 220 will not cause a large shielding to the air inlet 21, thereby ensuring the effective air inlet area of ​​the air inlet 21 and correspondingly ensuring its air intake volume. When the indoor unit is running, the airflow converges toward the air inlet 21 around the air inlet 21, wherein the airflow located in the area where the extension plate 220 is located can collide and contact with the plate surface of the extension plate 220, and the extension plate 220 with an adsorption effect can adsorb impurities and dust mixed in the airflow. After being adsorbed, the relatively clean airflow continues to flow to the air inlet 21 under the guiding effect of the extension plate 220, and continues to flow into the interior of the shell 20 through the air inlet 21 after secondary filtration by the frame 210 and the filter 100. The setting of the extension plate 220 can effectively increase the adsorption area of ​​the skeleton 200 on the basis of ensuring the area of ​​the filter 100 of the filter assembly 10 and the effective air inlet area of ​​the air inlet 21, thereby improving its adsorption effect on impurities and dust in the air flow, and the adsorption process of the extension plate 220 on impurities and dust is located upstream of the filter 100, which further reduces the filtration load of the filter 100 and the degree of clogging thereof, thereby further increasing the air intake of the filter 100 and ensuring the temperature regulation effect of the indoor unit on the indoor environment.

[0036] In addition, the extension plate 220, the frame 210 and the filter screen 100 form an integral component. When it needs to be cleaned, the entire filter assembly 10 can be directly removed and cleaned as a whole; the entire filter assembly 10 can be installed accordingly, and the disassembly, assembly and cleaning are all very convenient.

[0037] Specifically, in this embodiment, Figure 1 and Figure 2 As shown, the number of extension plates 220 can be equal to the sum of the first support bars 213 and the second frame bars 212b, and multiple extension plates 220 are connected to the first support bars 213 and the second frame bars 212b in a one-to-one correspondence. The two second frame bars 212b and the multiple first support bars 213 are parallel to each other and arranged at intervals along the length direction of the first frame bar 212a. Accordingly, the multiple extension plates 220 are arranged at intervals along the length direction of the first frame bar 212a; Figure 1As shown in the perspective, the air inlet 21 is located at the top of the shell 20, the frame 210 is connected to the air inlet 21, and the extension plate 220 is located on the upper side of the frame 210 and extends upward away from the frame 210, then a channel with openings at both the front and rear ends and the top is formed between each adjacent two extension plates 220, and the airflow can flow through the above-mentioned openings to between the two extension plates 220 and then flow to the filter 100 and the second support bar 214. Specifically, the airflow can fully contact the plate surface of the extension plate 220 during the process of flowing into the channel through the opening. Accordingly, the plate surface of the extension plate 220 can effectively adsorb impurities and dust in the airflow, and the airflow adsorbed in sequence by the extension plate 220 only needs to flow to the corresponding filter 100 and the first support bar 213, and after secondary filtration, enters the shell 20 through the air inlet 21. The above-mentioned extension plates 220 are arranged neatly, forming neat and orderly channels with a large opening area, thereby reducing the disturbance of the airflow caused by the staggered arrangement of the extension plates 220, as well as the lifting of impurities and dust filtered by the frame and the filter 100 caused by the airflow disturbance and generating greater noise pollution. Accordingly, on the basis of ensuring the effective adsorption of impurities and dust in the airflow, the stability of the airflow is improved, noise pollution is reduced, and the user comfort is improved.

[0038] Of course, in other embodiments, the air inlet 21 may also be located on the back plate or side plate of the housing 20. Figure 1 This is only an example and is not intended to be limiting. Similarly, the first support bar 213 is Figure 1 In the embodiment, the first support bar 213 extends along the width direction of the surrounding frame 212 . In other embodiments, the first support bar 213 may also extend along the length direction of the surrounding frame 212 .

[0039] In this embodiment, Figure 1 and Figure 2 As shown, the second frame strips 212b and the first support strips 213 are arranged at equal intervals along the length direction of the first frame strips 212a, and the arrangement interval is L; the plate surface of the extension plate 220 is perpendicular to the contour surface surrounded by the frame body 210, and the extension height of the extension plate 220 is H, H ≥ 1 / 2L. First of all, it should be noted that the extension trend of the frame body 210 is consistent with the air inlet 21, such as Figure 1 As shown, the air inlet 21 includes a flat area at the top and a curved area at the corner, and the contour surface of the frame 210 is consistent with the air inlet 21 and also includes a flat area and a curved area; the angle between the plate surface of the extension plate 220 and the contour surface of the frame 210 is within the range of 85° to 90°, and both are perpendicular. Figure 1As shown in , the extension plate 220 extends vertically upward, and its extension height is H; each extension plate 220 is arranged in parallel with equal intervals in the left-right direction, and the interval between each two adjacent extension plates 220 is L, H≥1 / 2L, the extension plate 220 is relatively high and the total area of ​​the extension plates 220 on both sides of each channel is not less than the area of ​​the channel filter 100, then the air flow along the plate surface approximately perpendicular to the extension plate 220 can flow upward and turn to flow downward under the guiding action of the extension plate 220, and the air flow flowing downward can first flow to the plate surface of the adjacent extension plate 220, and after the adsorption action of the plate surface, it flows downward to the filter 100 under its guiding action, and then flows into the shell 20 through the air inlet 21, thereby improving the adsorption sufficiency of the extension plate 220 on the air flow, and correspondingly further improves the filtering effect of the filter component 10 on impurities and dust in the air flow, and further reduces the filtering load of the filter 100, reducing its blockage degree.

[0040] Specifically, when the air inlet 21 is disposed on the top of the wall-mounted indoor unit housing 20 , H<100 mm, so as to meet the installation requirements of the wall-mounted indoor unit and the disassembly and assembly space of the filter assembly 10 .

[0041] Optionally, in this embodiment, if Figure 2 and Figure 3 As shown, the extension plate 220 may be provided with a vent 221. During use, on the one hand, the provision of the vent 221 can increase the surface area of ​​the extension plate 220, and the airflow flowing to the extension plate 220 can not only flow through the plate surface of the extension plate 220 and be adsorbed and filtered, but also flow to the air inlet 21 through the vent 221, and be adsorbed and filtered by the hole wall of the vent 221 during the flow, thereby further improving the filtering effect of the extension plate 220 and the filter assembly 10 on airflow impurities and dust; on the other hand, the airflow flowing toward the extension plate 220 can flow to the air inlet 21 through the vent 221, thereby enhancing the gas flowability of the extension plate 220, correspondingly reducing the obstruction of the airflow caused by the extension plate 220, improving the smoothness of the airflow, and thus improving the overall air intake and temperature regulation effect of the indoor unit.

[0042] Specifically, in this embodiment, the hole section at at least one end of the vent 221 is a flared hole section 221a. The setting of the flared hole section 221a can not only increase the hole wall area of ​​the vent 221, but also correspondingly increase the adsorption surface area of ​​the extension plate 220, further improving its adsorption and filtration effect on impurities and dust in the airflow; when the vent 221 is clogged with impurities, the outer end flared area of ​​the flared hole section 221a is larger, making it easier to clean the impurities inside through flaring, thereby improving the convenience of cleaning the vent 221. Specifically, as Figure 3As shown, both ends of the vent hole 221 are expanded hole sections 221a, and a straight hole section 221b may be left between the two expanded hole sections 221a. Preferably, the vent hole 221 only includes two expanded hole sections 221a to further improve its cleaning convenience.

[0043] In addition to increasing the adsorption area of ​​the extension plate 220 by providing the vent holes 221 as described above, in this embodiment, at least one of a groove and a convex point may be provided on the plate surface of the extension plate 220 .

[0044] The present embodiment also provides an air conditioner, comprising an outdoor unit and the indoor unit, wherein the indoor unit and the outdoor unit are connected through a refrigerant pipe to form a refrigerant cycle. The indoor unit of the air conditioner adopts the filter assembly 10, wherein the filter 100 of the filter assembly 10 can filter the airflow, and the frame 200 can adsorb and filter the impurities and dust mixed in the airflow, thereby effectively improving the cleanliness of the airflow flowing into the shell 20, reducing the blockage and pollution of the air duct assembly caused by impurities and dust in the air flow flowing through the air duct, ensuring the normal operation of the air duct assembly, and improving the user's comfort; at the same time, the setting of the frame 200 can also adsorb the impurities blocked on the filter 100 close to it, thereby effectively reducing the filtering load of the filter 100 and reducing the blocking degree of the filter 100, on the basis of ensuring that the filter assembly 10 effectively filters the airflow, further improve the effective air intake of the filter 100, and correspondingly further improve the temperature regulation efficiency of the indoor unit and the user's comfort.

[0045] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A filter assembly, characterized in that: The invention comprises a filter screen (100) without adsorption function and a frame (200) with adsorption function, wherein the frame (200) comprises a frame body (210), the frame body (210) encloses an installation opening (211), and the filter screen (100) is matched and arranged in the installation opening (211).

2. The filter assembly according to claim 1, characterized in that: The skeleton (200) comprises a matrix and the matrix is ​​doped with adsorption particles; Alternatively, the framework (200) is made of nano-anion material; or, the framework (200) comprises a base frame and a nano-anion adsorption layer coated on the outer wall of the base frame; Alternatively, the skeleton (200) is made of activated carbon fibers.

3. The filter assembly according to claim 1 or 2, characterized in that: The frame (200) further comprises an extension plate (220), wherein a first end of the extension plate (220) is connected to an outer wall of the frame (210), and a second end of the extension plate (220) extends away from the frame (210).

4. The filter assembly according to claim 3, characterized in that: The extension plate (220) is provided with a vent hole (221).

5. The filter assembly according to claim 4, characterized in that: The hole section at at least one end of the vent hole (221) is a flared hole section (221a).

6. The filter assembly according to claim 3, characterized in that: The extension plate (220) is provided with grooves and / or protrusions.

7. The filter assembly according to claim 1 or 2, characterized in that: The frame body (210) comprises a rectangular frame (212), a plurality of first support bars (213) and a plurality of second support bars (214); two of the opposing frame bars of the frame (212) are first frame bars (212a), and the other two opposing frame bars are second frame bars (212b); the plurality of the first support bars (213) are all connected between the two first frame bars (212a) and are arranged at intervals along the length direction of the first frame bars (212a); and the plurality of the second support bars (214) are all connected between the two second frame bars (212b) and are arranged at intervals along the length direction of the second frame bars (212b).

8. The filter assembly according to claim 7, characterized in that: The frame (200) further comprises extension plates (220), the number of which is equal to the sum of the first support bar (213) and the second frame bar (212b), and the plurality of extension plates (220) are connected to the first support bar (213) and the second frame bar (212b) in a one-to-one correspondence.

9. The filter assembly according to claim 8, characterized in that: The second frame strip (212b) and the first support strip (213) are arranged at equal intervals along the length direction of the first frame strip (212a), and the arrangement interval is L; the plate surface of the extension plate (220) is arranged perpendicular to the contour surface surrounded by the frame body (210), and the extension height of the extension plate (220) is H, H≥1 / 2L.

10. An indoor unit, characterized in that: It comprises a shell (20) and a filter assembly (10) according to any one of claims 1 to 9, wherein the shell (20) is provided with an air inlet (21), and a frame (210) of the filter assembly (10) is connected to the shell (20) and corresponds to the air inlet (21).

11. An air conditioner, characterized in that: It comprises an outdoor unit and the indoor unit according to claim 10, wherein the indoor unit is connected with the outdoor unit through a refrigerant pipe to form a refrigerant circulation.

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