Air conditioner indoor unit

Abstract

The application relates to the air conditioning technical field, in particular to an air conditioner indoor unit. The air conditioner indoor unit comprises a shell, the shell is provided with an air outlet and an air inlet, the air outlet is used for being communicated with an indoor space, and the shell is provided with: an air duct, which is respectively communicated with the air outlet and the air inlet; a fan, which is arranged in the air duct, can introduce air outside the shell into the air duct from the air inlet, and transport the air to the indoor space from the air outlet; and a filter assembly, which is arranged in the air duct, the filter assembly comprises: a filter screen frame; a first filter screen, which is arranged on the filter screen frame and is used for filtering particulate matters in the air; and a second filter screen, which is arranged on the filter screen frame and is located on a downstream side of the first filter screen and is used for filtering formaldehyde in the air; the filter screen frame is arranged on an upstream side of the fan, the first filter screen and the second filter screen are arranged at intervals, and a uniform flow cavity is formed between the first filter screen and the second filter screen. The application can improve the formaldehyde removal effect of the second filter screen.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an indoor air conditioning unit. Background Technology

[0002] Air conditioners typically consist of an indoor unit and an outdoor unit, and some air conditioners have a formaldehyde removal function.

[0003] Currently, air conditioners with formaldehyde removal capabilities typically consist of an outer casing containing an air duct and a formaldehyde-removing filter. Indoor air circulates within the duct, thus removing formaldehyde. However, the formaldehyde removal efficiency of current air conditioners is not ideal. Utility Model Content

[0004] This application discloses an indoor air conditioner unit that can improve the formaldehyde removal effect of the indoor air conditioner unit.

[0005] To achieve the above objectives, this application discloses an indoor air conditioning unit, comprising:

[0006] The outer casing has an air outlet and an air inlet, the air outlet being used to connect with the indoor space, and the interior of the outer casing contains:

[0007] The air duct is connected to the air outlet and the air inlet respectively;

[0008] A fan, located inside the air duct, is capable of drawing air from outside the outer casing into the air duct through the air inlet and delivering it to the indoor space through the air outlet.

[0009] A filter assembly, disposed within the air duct, comprises:

[0010] A filter holder;

[0011] The first filter screen, disposed on the filter screen frame, is used to filter particulate matter in the air;

[0012] The second filter screen, located on the filter screen frame and downstream of the first filter screen, is used to filter formaldehyde from the air.

[0013] In this application, the filtration assembly in the air duct includes a filter frame, and a first filter and a second filter disposed on the same filter frame. The first filter is used to filter particulate matter in the air, and the second filter is used to filter formaldehyde in the air. Since the first filter is located upstream of the second filter, the air introduced into the air duct from the air inlet will first pass through the first filter and then through the second filter. The air velocity will be reduced after being blocked by the first filter, that is, the air velocity entering the second filter will be less than the air velocity entering the first filter. This can prolong the time for the air to pass through the second filter, allowing the second filter to come into more sufficient contact with the formaldehyde in the air, thereby improving the formaldehyde removal effect of the second filter.

[0014] Furthermore, since the first and second filters are housed in the same filter holder, there is no need to set separate filter holders for the first and second filters, thus reducing the number of filter holders. This not only reduces the manufacturing cost of the filter assembly but also reduces the space occupied by the filter assembly in the air duct.

[0015] In one alternative embodiment, the filter screen is mounted on the upstream side of the fan.

[0016] In this embodiment, the filter is mounted upstream of the fan, where the air velocity is lower. This further reduces the air velocity entering the second filter, thereby extending the time the air spends passing through it and enhancing its formaldehyde removal efficiency. Furthermore, by mounting the filter upstream of the fan, dust and impurities are filtered out before the air enters the fan, protecting it from damage and maintaining its performance and efficiency.

[0017] In one alternative embodiment, the first filter and the second filter are spaced apart, and a flow equalization cavity is formed between the first filter and the second filter.

[0018] In this embodiment, a uniform flow cavity is formed between the first filter and the second filter. After the air flows out of the first filter, it enters the uniform flow cavity. The uniform flow cavity can reduce the air velocity by expanding the cross-sectional area of ​​the airflow channel, so that the airflow changes from local high-speed flow to more uniform low-speed flow, thereby further extending the time for the air to pass through the second filter and further improving the formaldehyde removal effect of the second filter. Moreover, after the air is evenly distributed in the uniform flow cavity, it can prevent the local airflow from impacting the second filter too strongly, thereby protecting the second filter and extending its service life.

[0019] In one optional embodiment, the spacing between the first filter screen and the second filter screen is 2 to 8 mm along the arrangement direction of the first filter screen and the second filter screen.

[0020] If the distance between the first and second filters is less than 2mm, the volume of the flow equalization chamber will be too small, resulting in a smaller reduction in airflow velocity and a smaller improvement in the formaldehyde removal effect of the second filter. If the distance between the first and second filters is greater than 8mm, the thickness of the filter assembly will be too large, leading to an excessively long air duct, which increases airflow resistance and reduces airflow performance.

[0021] Therefore, in this embodiment, the spacing between the first filter and the second filter is controlled at 2 to 8 mm. This not only allows the volume of the uniform flow cavity to be within a suitable range, but also allows control of the thickness of the filter assembly, ensuring that the length of the air duct is within a suitable range. This ensures that the second filter has excellent formaldehyde removal effect while also guaranteeing air intake performance.

[0022] In one optional embodiment, the air inlet includes an indoor air inlet and an outdoor air inlet, both of which are connected to the air duct.

[0023] The fan can draw indoor air into the duct through the indoor air inlet, and after passing through the first and second filters, it is discharged into the room through the air outlet.

[0024] The fan can draw outdoor air into the duct through the outdoor air inlet, and after passing through the first and second filters, it is discharged into the room through the air outlet.

[0025] In this embodiment, the air inlet includes an indoor air inlet and an outdoor air inlet. Therefore, both indoor and outdoor air can enter the air duct and be filtered by the filter components. In other words, by adopting the structure of this embodiment, not only can particulate matter and formaldehyde in indoor air be filtered, but also particulate matter and formaldehyde in outdoor air can be filtered, achieving the purpose of multiple uses in one product.

[0026] In one alternative embodiment, the filter rack includes:

[0027] The mounting frame surrounds and forms a mounting cavity, in which the first filter and the second filter are both disposed and distributed along the axial direction of the mounting frame.

[0028] In this embodiment, the mounting frame surrounds a mounting cavity, and the first and second filters are disposed in the mounting cavity. The mounting cavity can provide a uniform sealing boundary for the first and second filters. Only one sealing treatment is needed between the filter frame and the air duct to ensure the airtightness of the entire filter assembly and reduce the risk of air leakage.

[0029] In an optional embodiment, the filter rack further includes:

[0030] The first limiting part is provided on the inner peripheral wall of the mounting frame;

[0031] The second limiting part is provided on the inner peripheral wall of the mounting frame. The first limiting part and the second limiting part are distributed at intervals along the axial direction of the mounting frame. The first filter screen is in contact with the first limiting part and the second limiting part respectively.

[0032] In this embodiment, the first limiting part and the second limiting part are spaced apart along the axial direction of the mounting frame, forming a clamping effect on the first filter screen. After the first filter screen contacts the first limiting part and the second limiting part, its axial position is strictly limited, avoiding displacement caused by airflow impact, vibration, or installation errors. Furthermore, the first limiting part and the second limiting part can provide installation marks for the operator, allowing the operator to install the first filter screen into the preset position of the mounting frame without complex measurements or adjustments, reducing installation difficulty.

[0033] In one optional embodiment, the first limiting part is located upstream of the second limiting part, and the first limiting part is a limiting protrusion, wherein the limiting protrusion is provided at at least two corners of the mounting frame;

[0034] The second limiting part is a strip-shaped limiting rib, the extending direction of the limiting rib is perpendicular to the axial direction of the mounting frame, and the inner peripheral wall of the mounting frame includes a first inner wall and a second inner wall disposed opposite to each other, and both the first inner wall and the second inner wall are provided with the limiting rib.

[0035] In this embodiment, limiting protrusions are provided at at least two corners of the mounting frame. These corner protrusions provide support for the corners of the first filter screen, preventing deformation or collapse caused by uneven stress on the first filter screen at the corners. The strip-shaped limiting ribs have a large extension dimension, enabling them to form a large-area contact with the first filter screen, improving installation stability. Moreover, compared to point-shaped ribs, the strip-shaped limiting ribs can more evenly distribute pressure, reduce local stress concentration, and extend the life of the first filter screen.

[0036] In an optional embodiment, the filter rack further includes:

[0037] An elastic buckle protrudes from the inner wall of the mounting frame and presses against the outer peripheral surface of the second filter screen.

[0038] In this embodiment, the elastic buckle is located on the mounting frame and protrudes from the inner wall of the mounting frame. During the process of installing the second filter screen into the mounting cavity, the second filter screen will squeeze the elastic buckle, causing the elastic buckle to undergo elastic deformation, allowing the second filter screen to enter the preset position within the mounting frame. When the force applied to the second filter screen is stopped, the elastic buckle can abut against the outer circumferential surface of the second filter screen, thereby fixing the second filter screen. When it is necessary to remove the second filter screen, it is only necessary to pull it out, during which the elastic buckle will return to its elastic deformation. It can be seen that this embodiment uses an elastic buckle to fix the second filter screen, which can avoid bending the second filter screen during the installation process and reduce the risk of damage to the second filter screen.

[0039] In an optional embodiment, the filter rack further includes:

[0040] The second limiting part is provided on the inner peripheral wall of the mounting frame along the axial direction of the mounting frame. The second limiting part is located between the first filter screen and the second filter screen, and the second limiting part is in contact with the first filter screen, and there is a gap between the second limiting part and the second filter screen.

[0041] In this embodiment, the first filter and the second filter are not only separated by the second limiting part, but there is also a gap between the second limiting part and the second filter. Therefore, the axial dimension of the uniform flow cavity formed between the first filter and the second filter is larger than the dimension of the second limiting part. This allows the uniform flow cavity to have a larger volume, which can further reduce the air velocity and change the airflow from local high-speed flow to more uniform low-speed flow, thereby further prolonging the time for air to pass through the second filter and further improving the formaldehyde removal effect of the second filter.

[0042] In one alternative embodiment, the thickness of the first filter is greater than or less than the thickness of the second filter.

[0043] In this embodiment, when the thickness of the first filter is greater than the thickness of the second filter, the resistance of the first filter to air will increase, and the airflow velocity after flowing out of the first filter will be further reduced. This can further prolong the time for air to pass through the second filter, allowing the second filter to have more sufficient contact with the air, and further improving the formaldehyde removal effect of the second filter; and the greater thickness of the first filter can improve the formaldehyde filtration effect of the filter assembly.

[0044] When the thickness of the first filter screen is less than the thickness of the second filter screen, the formaldehyde filtration efficiency of the filter assembly can be improved. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of the indoor unit of an air conditioner disclosed in an embodiment of this application;

[0047] Figure 2 This is a partial structural diagram of the air conditioner indoor unit disclosed in an embodiment of this application. Figure 1 ;

[0048] Figure 3 This is a partial structural diagram of the air conditioner indoor unit disclosed in an embodiment of this application. Figure 2 ;

[0049] Figure 4 This is a cross-sectional view of the indoor unit of an air conditioner disclosed in an embodiment of this application;

[0050] Figure 5 For this application Figure 4 Enlarged view of point A in the middle;

[0051] Figure 6 This is a schematic diagram of the structure of the filtering component disclosed in the embodiments of this application, and an enlarged schematic diagram of point B therein;

[0052] Figure 7 This is a schematic diagram of the filter rack structure disclosed in an embodiment of this application.

[0053] Explanation of reference numerals in the attached figures:

[0054] 100. Outer casing; 101. Air outlet; 102. Air inlet; 1021. Indoor air inlet; 1022. Outdoor air inlet; 103. Air duct;

[0055] 200. Fan;

[0056] 300, Filter assembly; 301, Flow equalization chamber; 302, First inner wall; 303, Second inner wall; 310, Filter screen frame; 311, Mounting frame; 312, First limiting part; 313, Second limiting part; 314, Elastic buckle; 315, Sealing plate; 320, First filter screen; 330, Second filter screen. Detailed Implementation

[0057] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0058] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0059] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0060] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0061] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0062] Air conditioners typically consist of an indoor unit and an outdoor unit, and some air conditioners have a formaldehyde removal function.

[0063] Currently, the indoor unit of an air conditioner with formaldehyde removal function includes an outer casing, an air duct inside the casing, and a formaldehyde removal filter inside the air duct. Indoor air can circulate within the air duct, thereby removing formaldehyde from the indoor air.

[0064] The inventors discovered that a fan is installed inside the air duct, which circulates indoor air within the duct. During operation, the fan generates negative pressure, thereby accelerating the airflow within the duct. This results in a faster airflow through the formaldehyde removal filter, leading to a shorter contact time between the air and the filter material. Consequently, formaldehyde molecules may not be completely adsorbed or decomposed before passing through the formaldehyde removal filter, resulting in an unsatisfactory formaldehyde removal effect of the air conditioner.

[0065] The air conditioning indoor unit provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0066] Please see Figures 1 to 5 This application discloses an indoor unit for an air conditioner, comprising:

[0067] The outer casing 100 has an air outlet 101 and an air inlet 102. The air outlet 101 is used to connect with the indoor space. The outer casing 100 contains:

[0068] The air duct 103 is connected to the air outlet 101 and the air inlet 102 respectively.

[0069] A fan 200, disposed within an air duct 103, is capable of drawing air from outside the housing 100 into the air duct 103 through the air inlet 102 and delivering it to the indoor space through the air outlet 101. For example, the fan 200 here can be a centrifugal fan or an axial fan, and this application does not limit it to this.

[0070] Filter assembly 300 is disposed within air duct 103, and filter assembly 300 includes:

[0071] A filter holder 310, meaning that there is only one filter holder 310 within a filter assembly 300. For example, the indoor unit of the air conditioner of this application may include one filter assembly 300 or multiple filter assemblies 300, and this application does not limit this.

[0072] A first filter 320, disposed on a filter holder 310, is used to filter particulate matter in the air. For example, the first filter 320 may be a HEPA high-efficiency air filter. The first filter 320 may have a folded structure, meaning its surface has pleats.

[0073] The second filter 330, disposed on the filter holder 310 and located downstream of the first filter 320, is used to filter formaldehyde from the air. Exemplarily, the second filter 330 can be an activated carbon filter, a bio-enzyme filter, a cold catalyst filter, a molecular sieve filter, etc., and this application does not limit this to such methods. The second filter 330 may have a honeycomb structure to increase its filtration area.

[0074] In this application, the filter assembly 300 in the air duct 103 includes a filter frame 310, and a first filter 320 and a second filter 330 disposed on the same filter frame 310. The first filter 320 is used to filter particulate matter in the air, and the second filter 330 is used to filter formaldehyde in the air. Since the first filter 320 is located upstream of the second filter 330, the air introduced into the air duct 103 from the air inlet 102 will first pass through the first filter 320 and then through the second filter 330. The air velocity will be reduced after being blocked by the first filter 320, that is, the air velocity of the air entering the second filter 330 will be less than the air velocity of the air entering the first filter 320. This can prolong the time for the air to pass through the second filter 330, so that the second filter 330 can have more sufficient contact with the air and improve the formaldehyde removal effect of the second filter 330.

[0075] Furthermore, since the first filter 320 and the second filter 330 are located in the same filter holder 310, there is no need to set filter holders 310 separately for the first filter 320 and the second filter 330, thereby reducing the number of filter holders 310. This not only reduces the manufacturing cost of the filter assembly 300, but also reduces the space occupied by the filter assembly 300 in the air duct 103.

[0076] Fan 200 performs work on the air through the rotation of its impeller, adding energy to the air and thus accelerating its flow. Upstream of fan 200, the air is relatively still or flowing at a low speed. When the air enters fan 200, it is rapidly accelerated and propelled downstream by the force of the impeller blades. Therefore, the air velocity increases significantly downstream of fan 200. From the above analysis, it can be seen that the wind speed upstream of fan 200 is lower than the wind speed downstream of fan 200.

[0077] To further improve the filtration performance of filter assembly 300, please refer to [link / reference needed]. Figure 4 In one alternative embodiment, the filter frame 310 is located on the upstream side of the fan 200.

[0078] In this embodiment, the filter holder 310 is located upstream of the fan 200. Since the air velocity upstream of the fan 200 is lower, this further reduces the air velocity entering the second filter 330, thereby extending the time the air spends passing through the second filter 330 and further enhancing its formaldehyde removal efficiency. Furthermore, because the filter holder 310 is upstream of the fan 200, dust and impurities are filtered out before the air enters the fan 200, protecting the fan 200 from damage and maintaining its performance and efficiency. Of course, the filter holder 310 can also be located downstream of the fan 200; this application does not limit this.

[0079] Please see Figure 5In one optional embodiment, the first filter 320 and the second filter 330 are spaced apart, and a flow equalization cavity 301 is formed between the first filter 320 and the second filter 330.

[0080] In this embodiment, a uniform flow cavity 301 is formed between the first filter 320 and the second filter 330. After the air flows out of the first filter 320, it enters the uniform flow cavity 301. The uniform flow cavity 301 can reduce the air velocity by expanding the cross-sectional area of ​​the airflow channel, so that the airflow changes from local high-speed flow to more uniform low-speed flow, thereby further extending the time for the air to pass through the second filter 330 and further improving the formaldehyde removal effect of the second filter 330. Moreover, after the air is evenly distributed in the uniform flow cavity 301, it can prevent the local airflow from impacting the second filter 330 too strongly, thereby protecting the second filter 330 and extending the service life of the second filter 330.

[0081] In one optional embodiment, the spacing between the first filter 320 and the second filter 330 along the arrangement direction of the first filter 320 and the second filter 330 is 2 to 8 mm. For example, the spacing between the first filter 320 and the second filter 330 can be 2.5 mm, 3.0 mm, 4.2 mm, 4.5 mm, 5.0 mm, 6.3 mm, 6.8 mm, 7.5 mm, etc., and this application does not limit this to any particular type.

[0082] If the distance between the first filter 320 and the second filter 330 is less than 2mm, the volume of the flow equalization cavity 301 will be too small, resulting in a smaller reduction in airflow velocity and a smaller improvement in the formaldehyde removal effect of the second filter 330. If the distance between the first filter 320 and the second filter 330 is greater than 8mm, the thickness of the filter assembly 300 will be too large, leading to an excessively long air duct 103, which increases airflow resistance and reduces airflow performance.

[0083] Therefore, in this embodiment, the distance between the first filter 320 and the second filter 330 is controlled to be 2-8mm. This not only allows the volume of the uniform flow cavity 301 to be within a suitable range, but also allows the thickness of the filter assembly 300 to be controlled, so that the length of the air duct 103 is within a suitable range. This ensures that the second filter 330 has excellent formaldehyde removal effect while ensuring air intake performance.

[0084] In some embodiments, the air inlet 102 can be an indoor air inlet 1021 or an outdoor air inlet 1022. When the air inlet 102 is an indoor air inlet 1021, the filter assembly 300 can filter particulate matter and formaldehyde in the indoor air; when the air inlet 102 is an outdoor air inlet 1022, the filter assembly 300 can filter particulate matter and formaldehyde in the outdoor air.

[0085] Please see Figure 3 and Figure 4In one optional embodiment, the air inlet 102 includes an indoor air inlet 1021 and an outdoor air inlet 1022, both of which are connected to the air duct 103. The fan 200 draws indoor air into the air duct 103 through the indoor air inlet 1021, and after passing through the first filter 320 and the second filter 330, exhausts it into the room through the air outlet 101. The fan 200 also draws outdoor air into the air duct 103 through the outdoor air inlet 1022, and after passing through the first filter 320 and the second filter 330, exhausts it into the room through the air outlet 101.

[0086] In this embodiment, the air inlet 102 includes an indoor air inlet 1021 and an outdoor air inlet 1022. Therefore, both indoor and outdoor air can enter the air duct 103 and be filtered by the filter component 300. In other words, with the structure of this embodiment, not only can particulate matter and formaldehyde in indoor air be filtered, but also particulate matter and formaldehyde in outdoor air can be filtered, achieving the purpose of multiple uses in one product.

[0087] In some embodiments, the indoor unit of the air conditioner also includes a motor and a valve plate connected to each other. The motor is located inside the housing 100, and the valve plate is located inside the air duct 103. The motor can drive the valve plate to switch between a first position and a second position. When the valve plate is in the first position, the valve plate blocks the indoor air inlet 1021 and opens the outdoor air inlet 1022. When the valve plate is in the second position, the valve plate blocks the outdoor air inlet 1022 and opens the indoor air inlet 1021.

[0088] Please see Figure 6 and Figure 7 In one alternative embodiment, the filter holder 310 includes:

[0089] Mounting frame 311 surrounds and forms a mounting cavity. First filter screen 320 and second filter screen 330 are both disposed within the mounting cavity and along the axial direction of mounting frame 311. Figure 5 The distribution is shown in the direction indicated by the x-arrow line.

[0090] In this embodiment, the mounting frame 311 is surrounded by a mounting cavity, and the first filter 320 and the second filter 330 are disposed in the mounting cavity. The mounting cavity can provide a uniform sealing boundary for the first filter 320 and the second filter 330. Only one sealing treatment is needed between the filter frame 310 and the air duct 103 to ensure the airtightness of the entire filter assembly 300 and reduce the risk of air leakage.

[0091] For example, the housing 100 is provided with a pull-out opening, and the filter frame 310 is pull-outably disposed in the air duct 103 through the pull-out opening. The filter frame 310 may also include a sealing plate 315. When the filter frame 310 is disposed in the air duct 103, the sealing plate 315 is located inside the pull-out opening and blocks the pull-out opening.

[0092] Please see Figure 6 and Figure 7 In an optional embodiment, the filter holder 310 further includes:

[0093] The first limiting part 312 is provided on the inner peripheral wall of the mounting frame 311;

[0094] The second limiting part 313 is provided on the inner peripheral wall of the mounting frame 311. The first limiting part 312 and the second limiting part 313 are distributed at intervals along the axial direction of the mounting frame 311. The first filter screen 320 is in contact with the first limiting part 312 and the second limiting part 313 respectively.

[0095] In this embodiment, the first limiting part 312 and the second limiting part 313 are spaced apart along the axial direction of the mounting frame 311, forming a clamping effect on the first filter screen 320. After the first filter screen 320 contacts the first limiting part 312 and the second limiting part 313, its axial position is strictly limited, avoiding displacement caused by airflow impact, vibration, or installation errors. Furthermore, the first limiting part 312 and the second limiting part 313 can provide installation marks for the operator, allowing the operator to install the first filter screen 320 into the preset position of the mounting frame 311 without complex measurements or adjustments, reducing installation difficulty.

[0096] It should be noted that the first filter 320 here has a certain degree of flexibility. When the first filter 320 is assembled between the first limiting part 312 and the second limiting part 313, the first filter 320 will deform to bypass the first limiting part 312 and be inserted between the first limiting part 312 and the second limiting part 313.

[0097] Please see Figure 6 and Figure 7 In one optional embodiment, the first limiting portion 312 is located upstream of the second limiting portion 313. The first limiting portion 312 is a limiting protrusion, and the mounting frame 311 has limiting protrusions at at least two corners. For example, the mounting frame 311 has limiting protrusions at both corners that are obliquely distributed.

[0098] The second limiting part 313 is a strip-shaped limiting rib. The extending direction of the limiting rib is perpendicular to the axial direction of the mounting frame 311. The inner peripheral wall of the mounting frame 311 includes a first inner wall 302 and a second inner wall 303 arranged opposite to each other. Both the first inner wall 302 and the second inner wall 303 are provided with limiting ribs.

[0099] In this embodiment, limiting protrusions are provided at at least two corners of the mounting frame 311. These corner limiting protrusions provide support for the corners of the first filter screen 320, preventing deformation or collapse of the first filter screen 320 due to uneven stress at the corners. The strip-shaped limiting ribs have a large extension dimension, enabling them to form a large-area contact with the first filter screen 320, improving installation stability. Moreover, compared to point-shaped ribs, the strip-shaped limiting ribs can more evenly distribute pressure, reduce local stress concentration, and extend the lifespan of the first filter screen 320. Of course, in addition to this embodiment, clips, screws, and other tools can also be used to fix the first filter screen 320; this application does not limit this.

[0100] Generally speaking, the second filter screen 330 is made of a material with relatively high hardness and a certain degree of brittleness. Using the same constraint structure that constrains the first filter screen 320 to constrain the second filter screen 330 may damage the second filter screen 330. To prevent damage to the second filter screen 330, please refer to [link / reference needed]. Figure 7 In an optional embodiment, the filter holder 310 further includes:

[0101] The elastic buckle 314 protrudes from the inner wall of the mounting frame 311 and presses against the outer peripheral surface of the second filter screen 330.

[0102] In this embodiment, the elastic buckle 314 is disposed on the mounting frame 311 and protrudes from the inner wall of the mounting frame 311. During the process of inserting the second filter screen 330 into the mounting cavity, the second filter screen 330 will squeeze the elastic buckle 314, causing the elastic buckle 314 to undergo elastic deformation, allowing the second filter screen 330 to enter the preset position within the mounting frame 311. When the force applied to the second filter screen 330 is stopped, the elastic buckle 314 can abut against the outer peripheral surface of the second filter screen 330, thereby fixing the second filter screen 330. When it is necessary to remove the second filter screen 330, it is only necessary to pull out the second filter screen 330. During this process, the elastic buckle 314 will return to its elastic deformation. It can be seen that this embodiment uses the elastic buckle 314 to fix the second filter screen 330, which can avoid bending the second filter screen 330 during the installation process and reduce the risk of damage to the second filter screen 330.

[0103] Please see Figure 5 and Figure 7 In an optional embodiment, the filter holder 310 further includes:

[0104] The second limiting part 313 is provided on the inner peripheral wall of the mounting frame 311. Along the axial direction of the mounting frame 311, the second limiting part 313 is located between the first filter screen 320 and the second filter screen 330, and the second limiting part 313 is in contact with the first filter screen 320, and there is a gap between the second limiting part 313 and the second filter screen 330.

[0105] In this embodiment, the first filter 320 and the second filter 330 are not only separated by the second limiting part 313, but there is also a gap between the second limiting part 313 and the second filter 330. Therefore, the axial dimension of the uniform flow cavity 301 formed between the first filter 320 and the second filter 330 is larger than the dimension of the second limiting part 313. This allows the uniform flow cavity 301 to have a larger volume, so as to further reduce the air flow velocity and change the airflow from local high-speed flow to more uniform low-speed flow, thereby further prolonging the time for air to pass through the second filter 330 and further improving the formaldehyde removal effect of the second filter 330.

[0106] Please see Figure 5 In an optional embodiment, the thickness of the first filter 320 (by...) Figure 5 The thickness of the second filter 330 (as shown in dimension d1) is greater than or less than the thickness of the d1 dimension (as shown in dimension d1). Figure 5 (The d2 dimension is shown in the middle).

[0107] In this embodiment, when the thickness of the first filter 320 is greater than the thickness of the second filter 330, the resistance of the first filter 320 to air will increase, and the airflow velocity after flowing out of the first filter 320 will be further reduced. This can further prolong the time for air to pass through the second filter 330, allowing the second filter 330 to come into more full contact with the air, and further improving the formaldehyde removal effect of the second filter 330; and the larger thickness of the first filter 320 can improve the formaldehyde filtration effect of the filter assembly 300.

[0108] When the thickness of the first filter 320 is less than the thickness of the second filter 330, the formaldehyde filtration efficiency of the filter assembly 300 can be improved.

[0109] The foregoing embodiments of this application focus on describing the differences between various embodiments. As long as the different optimization features between embodiments are not contradictory, they can be combined to form better embodiments. For the sake of brevity, these differences will not be elaborated upon here. The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make many modifications without departing from the spirit and scope of the claims, all of which fall within the protection scope of this application.

Claims

1. An indoor unit for an air conditioner, characterized in that, include: An outer casing (100) is provided with an air outlet (101) and an air inlet (102). The air outlet (101) is used to communicate with the indoor space. The outer casing (100) contains: The air duct (103) is connected to the air outlet (101) and the air inlet (102) respectively; A fan (200) is installed in the air duct (103) and can draw air from outside the outer casing (100) into the air duct (103) through the air inlet (102) and deliver it to the indoor space through the air outlet (101). A filter assembly (300) is disposed within the air duct (103), and the filter assembly (300) includes: A filter holder (310); A first filter (320) is disposed on the filter frame (310) and is used to filter particulate matter in the air; The second filter (330) is disposed on the filter frame (310) and located downstream of the first filter (320), and is used to filter formaldehyde in the air; The filter frame (310) is located on the upstream side of the fan (200); The first filter (320) and the second filter (330) are spaced apart, and a flow equalization cavity (301) is formed between the first filter (320) and the second filter (330).

2. The indoor unit of the air conditioner according to claim 1, characterized in that, Along the arrangement direction of the first filter screen (320) and the second filter screen (330), the distance between the first filter screen (320) and the second filter screen (330) is 2 to 8 mm.

3. The indoor unit of the air conditioner according to claim 1, characterized in that, The first filter (320) has a folded structure, and the second filter (330) has a honeycomb structure.

4. The indoor unit of the air conditioner according to claim 1, characterized in that, The air inlet (102) includes an indoor air inlet (1021) and an outdoor air inlet (1022), both of which are connected to the air duct (103). The fan (200) can introduce indoor air into the air duct (103) through the indoor air inlet (1021), and after passing through the first filter (320) and the second filter (330), it is discharged into the room from the air outlet (101); The fan (200) can introduce outdoor air into the air duct (103) through the outdoor air inlet (1022), and after passing through the first filter (320) and the second filter (330), it is discharged into the room from the air outlet (101).

5. The air conditioning indoor unit according to any one of claims 1 to 4, characterized in that, The filter frame (310) includes: Mounting frame (311) surrounds and forms mounting cavity, the first filter (320) and the second filter (330) are both disposed in the mounting cavity and distributed along the axial direction of the mounting frame (311).

6. The indoor unit of the air conditioner according to claim 5, characterized in that, The filter frame (310) also includes: The first limiting part (312) is provided on the inner peripheral wall of the mounting frame (311); The second limiting part (313) is provided on the inner peripheral wall of the mounting frame (311). The first limiting part (312) and the second limiting part (313) are distributed at intervals along the axial direction of the mounting frame (311). The first filter screen (320) is in contact with the first limiting part (312) and the second limiting part (313) respectively.

7. The indoor unit of the air conditioner according to claim 6, characterized in that, The first limiting part (312) is located upstream of the second limiting part (313). The first limiting part (312) is a limiting protrusion. The limiting protrusion is provided at at least two corners of the mounting frame (311). The second limiting part (313) is a strip-shaped limiting rib. The extending direction of the limiting rib is perpendicular to the axial direction of the mounting frame (311). The inner peripheral wall of the mounting frame (311) includes a first inner wall (302) and a second inner wall (303) arranged opposite to each other. Both the first inner wall (302) and the second inner wall (303) are provided with the limiting rib.

8. The indoor unit of the air conditioner according to claim 6, characterized in that, The filter frame (310) also includes: An elastic buckle (314) protrudes from the inner wall of the mounting frame (311) and presses against the outer peripheral surface of the second filter screen (330).

9. The indoor unit of the air conditioner according to claim 8, characterized in that, The filter frame (310) also includes: The second limiting part (313) is provided on the inner peripheral wall of the mounting frame (311) along the axial direction of the mounting frame (311). The second limiting part (313) is located between the first filter screen (320) and the second filter screen (330), and the second limiting part (313) is in contact with the first filter screen (320), and there is a gap between the second limiting part (313) and the second filter screen (330).

10. The indoor unit of the air conditioner according to claim 1, characterized in that, The thickness of the first filter (320) is greater than or less than the thickness of the second filter (330).

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