Fan-coil unit with air filtering structure

Abstract

The utility model relates to fan -coil technical field provides a fan -coil with air filter structure, include: fan -coil main part, the communication pipe is set up in the outside of fan -coil main part, and its one end is connected with fan -coil main part through third connecting flange, the connecting pipe is set up in the other end of communication pipe, and its other end swing installation has the air inlet filter piece, the damping connecting piece is set up between communication pipe and connecting pipe, and its both ends swing setting have composite filter piece and auxiliary suction accessory, wherein, the outer surface of composite filter piece and auxiliary suction accessory all through the hole is set up, and forms a passage between connecting pipe and communication pipe. The utility model discloses through setting multilayer filter design, covers more extensive particle size's impurity, improves air filter precision and comprehensive purification effect greatly, satisfies the use scene of higher cleanliness demand, and simplifies the dismounting step of device, solves the inconvenient problem of filter core replacement in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of fan coil unit technology, and in particular to a fan coil unit with an air filtration structure. Background Technology

[0002] In building air conditioning systems, fan coil units, as the core equipment for regulating indoor air temperature, are widely used in various scenarios such as residences, offices, medical facilities, and commercial spaces. Their working principle involves a fan driving indoor air through heat exchange components to cool or heat the air, and then returning the treated air to the room to maintain the set indoor temperature environment.

[0003] However, existing technologies, such as Chinese Publication No. CN222560139U, describe a fan coil unit with an air filtration structure, including a fan coil unit assembly, an inlet filter assembly, and an outlet filter assembly. The fan coil unit assembly is equipped with a heat exchange box for heat exchange, and an outlet filter assembly for filtering air before it is discharged is installed on the right side of the heat exchange box. Compared with existing technologies, this utility model has the following advantages: by adding a fan coil unit assembly, an inlet filter assembly, an outlet filter assembly, and a filter plate, the inlet filter assembly is installed at the inlet of the volute, the filter plate is installed in the mounting groove, and the outlet filter assembly is installed on the right side of the heat exchange box. The introduced air is first filtered by the filter plate, and after heat exchange, it is discharged through the outlet filter assembly. After secondary filtration by the activated carbon filter plate and the outlet filter plate, the indoor air quality can be improved. By adding a fan coil unit assembly and an inlet filter assembly, the position of the inlet can be changed.

[0004] However, during use, it was found that this device relies solely on the filter plate at the air inlet, which can only initially intercept large dust particles in the air and cannot effectively filter fine particulate matter. In the current complex indoor and outdoor air environment, especially in densely populated areas or places with high air quality requirements, a single filtration structure cannot form a comprehensive pollution interception system. This results in residual pollutants in the treated air, making it difficult to protect the respiratory health of indoor occupants and failing to adapt to the differentiated air quality needs of different scenarios. Furthermore, the filter replacement operation is inconvenient. When the filter needs to be replaced, the operator must first remove the external protective cover of the fan coil unit, then remove the bolts or clips that fix the filter assembly one by one, and remove the entire filter assembly from the equipment before replacing the internal filter element or filter plate. After replacement, the steps must be reversed to reassemble and fix it. The entire replacement process is cumbersome, time-consuming, and requires professional personnel with tools. This not only increases the labor and time costs of maintenance but may also damage the sealing performance of the fan coil unit or loosen components due to improper operation during disassembly and assembly, affecting the normal operation and stability of the equipment. Utility Model Content

[0005] The purpose of this invention is to solve the problems of single filtration levels and inconvenient filter element replacement in existing fan coil units.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fan coil unit with an air filtration structure, comprising: a fan coil unit body; a connecting pipe disposed outside the fan coil unit body, one end of which is connected to the fan coil unit body via a third connecting flange; a connecting pipe disposed at the other end of the connecting pipe, the other end of which is movably fitted with an air inlet filter; and a shock-absorbing connecting member disposed between the connecting pipe and the connecting pipe, both ends of which are movably fitted with a composite filter and an auxiliary adsorption member; wherein, the outer surfaces of the composite filter and the auxiliary adsorption member are both provided with through holes, forming a channel with the connecting pipe and the connecting pipe.

[0007] The technical effects of adopting the above-mentioned further solutions are as follows: the air inlet filter, composite filter and auxiliary adsorption components work together to significantly improve air cleanliness through multi-layer filtration and odor adsorption, solving the problem of the single filtration level in the existing system; the shock-absorbing connector can reduce vibration, and the snap-fit ​​structure between its filter frame and mounting frame makes filter replacement convenient, solving the problem of inconvenient replacement in the existing system, while ensuring stable airflow.

[0008] In a preferred embodiment, the composite filter element includes: a pre-filter layer disposed on one side near the connecting pipe; a high-efficiency filter layer movably installed on the side of the pre-filter layer; and a medium-efficiency filter layer movably installed between the pre-filter layer and the high-efficiency filter layer; wherein the filtration efficiency of the pre-filter layer, the medium-efficiency filter layer, and the high-efficiency filter layer increases sequentially.

[0009] The technical effect of adopting the above-mentioned further solution is as follows: the composite filter element contains pre-filter, medium-efficiency filter, and high-efficiency filter layers. The pre-filter layer is close to the connecting pipe, the medium-efficiency filter layer is in between the two, and the filtration efficiency of the three layers increases in that order. Air first passes through the pre-filter layer to remove larger impurities, then passes through the medium-efficiency filter layer to treat medium impurities, and finally the high-efficiency filter layer removes fine particles, achieving step-by-step fine filtration, significantly improving air filtration accuracy and air cleanliness.

[0010] In a preferred embodiment, the air inlet filter includes: a pre-filter cover, installed at the end of the connecting pipe; and multiple sets of filter holes that penetrate the surface of the pre-filter cover. The pre-filter cover is threaded to the end of the connecting pipe, and the outer surface of the pre-filter cover has an outwardly convex arc shape.

[0011] The technical advantages of adopting the above-mentioned further solution are as follows: the pre-filter cover of the air inlet filter element is installed at the end of the connecting pipe, and the multiple sets of filter holes on the surface can initially filter out large particulate impurities in the air, reducing the burden on the subsequent composite filter element; the outward convex arc shape can increase the air inlet area and reduce airflow resistance; and the pre-filter cover and the connecting pipe are connected by threads, which makes disassembly convenient, facilitates regular cleaning and maintenance, and ensures the continuous and stable preliminary filtration effect of the device.

[0012] In a preferred embodiment, the shock-absorbing connector includes: a bellows disposed between the connecting pipe and the connecting pipe; a second connecting flange, one set of which is installed at the end of the bellows near the connecting pipe; and a first connecting flange, one set of which is installed at the end of the bellows near the connecting pipe; wherein, one end of the second connecting flange is connected to the connecting pipe, and one end of the first connecting flange is connected to the connecting pipe.

[0013] The technical effect of adopting the above-mentioned further solution is that the corrugated pipe of the shock-absorbing connector is located between the connecting pipe and the connecting pipe, and the first and second connecting flanges are installed at both ends respectively. The two flanges are connected to the connecting pipe and the connecting pipe respectively, which not only firmly connects the two pipes and ensures smooth airflow, but also uses the elasticity of the corrugated pipe to buffer the vibration of the device operation, reduce noise transmission, and improve the overall operational stability.

[0014] In a preferred embodiment, the auxiliary adsorption element includes an activated carbon adsorption element, which is movably installed on the side of the corrugated pipe near the connecting pipe.

[0015] The technical effect of adopting the above-mentioned further solution is that after the air passes through the composite filter to remove impurities, it will flow through the activated carbon adsorption element, which can effectively adsorb odors, harmful gases and other substances in the air, thereby further optimizing air quality.

[0016] In a preferred embodiment, the shock-absorbing connector further includes: a second filter frame, movably mounted between two second connecting flanges; and a first filter frame, movably mounted between two first connecting flanges; wherein the composite filter element is movably mounted within the second filter frame, and the auxiliary adsorption element is mounted within the first filter frame.

[0017] The technical advantages of adopting the above-mentioned further solutions are: both provide stable support for the filter components, avoid displacement caused by airflow impact, ensure filtration and adsorption effects, and the movable installation design also provides convenience for subsequent component maintenance and replacement.

[0018] In a preferred embodiment, the shock-absorbing connector further includes: a mounting bracket, movably mounted in the second filter frame and the first filter frame; a limiting block, welded to the left and right sides of the mounting bracket; and connecting slots, symmetrically arranged on the left and right sides inside the second filter frame and the first filter frame; wherein the mounting bracket and the limiting block cooperate with each other.

[0019] The technical advantage of adopting the above-mentioned further solution is that the mounting bracket of the shock-absorbing connector is movably installed in the second and first filter frames, and the limiting blocks welded on its left and right sides cooperate with the symmetrical connecting slots inside the filter frames. This structure allows the composite filter element and auxiliary adsorption element to be quickly installed and fixed, and disassembly does not require complicated tools, greatly simplifying the maintenance process, improving the efficiency of component replacement, and ensuring the continuous and stable operation of the device.

[0020] In a preferred embodiment, the fan coil unit with an air filtration structure further includes: multiple sealing gaskets, which are respectively installed at the connection points of the first connecting flange, the second connecting flange, and the third connecting flange.

[0021] The technical effects of adopting the above-mentioned further solutions are: the sealing gasket can fill the flange connection gap, prevent unfiltered air from seeping in from the gap, ensure that all air is treated by the filtration system, and improve the filtration effect; at the same time, it avoids air leakage leading to increased energy consumption and ensures the operating efficiency and stability of the device.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This invention solves the problem of single-layer filtration in existing technologies by employing a multi-level composite filter design. The composite filter comprises a pre-filter, a medium-efficiency filter, and a high-efficiency filter, with their filtration efficiencies increasing sequentially. Air first passes through the pre-filter mesh of the inlet filter to initially intercept large particles, then enters the composite filter. The pre-filter filters out larger dust particles, the medium-efficiency filter captures medium-sized particles, and finally the high-efficiency filter removes fine particles, forming a stepped filtration system. Simultaneously, the activated carbon adsorbent in the auxiliary adsorption component adsorbs odors from the air, further improving air quality. This multi-level, multi-dimensional filtration design, compared to existing single-layer filtration structures, can cover a wider range of particle sizes, significantly improving air filtration accuracy and overall purification effect, meeting the needs of applications requiring higher cleanliness.

[0023] This invention incorporates mounting brackets within the first and second filter frames of the shock-absorbing connector. Limiting blocks are welded to both sides of the mounting bracket, and corresponding connecting slots are provided inside the filter frame. The limiting blocks and connecting slots cooperate to achieve quick engagement. When replacing the composite filter element, there is no need to disassemble the flange or pipes; simply pull out the limiting blocks on both sides of the mounting bracket to disengage it from the connecting slots of the second filter frame, and the mounting bracket and composite filter element can be removed. The replacement process for the auxiliary adsorption element is identical, allowing for convenient disassembly and assembly via the mounting bracket within the first filter frame. This design eliminates complex disassembly steps, requires no specialized tools, and allows operators to quickly replace the filter element. This not only shortens maintenance time and reduces maintenance difficulty but also minimizes wear and tear on the device's connection structure caused by frequent disassembly, extending the overall service life of the device. Attached Figure Description

[0024] Figure 1 A three-dimensional structural diagram of a fan coil unit with an air filtration structure provided by this utility model; Figure 2 A side view of a fan coil unit with an air filtration structure provided by this utility model; Figure 3 An enlarged structural schematic diagram of a shock-absorbing connector for a fan coil unit with an air filtration structure provided by this utility model; Figure 4 An exploded view of the shock-absorbing connector for a fan coil unit with an air filtration structure provided by this utility model; Figure 5 This is an enlarged structural diagram of the air inlet filter element of a fan coil unit with an air filtration structure provided by this utility model.

[0025] Legend: 1. Fan coil unit body; 2. Connecting pipe; 3. Third connecting flange; 4. Vibration damping connector; 401. Corrugated pipe; 402. First filter frame; 403. First connecting flange; 404. Second filter frame; 405. Second connecting flange; 406. Mounting bracket; 407. Limiting block; 408. Connecting slot; 5. Connecting pipe; 6. Inlet filter element; 601. Pre-filter cover; 602. Filter holes; 7. Composite filter element; 701. Primary filter layer; 702. Medium-efficiency filter layer; 703. High-efficiency filter layer; 8. Auxiliary adsorption element; 801. Activated carbon adsorption element; 9. Through hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0027] Please see Figures 1-5 This embodiment provides a fan coil unit with an air filtration structure that has a basic filtration system and an airflow channel. The specific concept is as follows: A fan coil unit with an air filtration structure includes a fan coil unit body 1, and the fan coil unit with an air filtration structure also includes: a connecting pipe 2, a connecting pipe 5, an air inlet filter element 6, a composite filter element 7, and an auxiliary adsorption element 8.

[0028] Among them, the fan coil unit body 1 is externally assembled with a connecting pipe 2.

[0029] One end of the connecting pipe 2 is tightly connected to the fan coil unit body 1 via the third connecting flange 3.

[0030] In addition, the other end of the connecting pipe 2 is connected to the connecting pipe 5 through the shock-absorbing connector 4.

[0031] Among them, the end of the connecting pipe 5 away from the shock-absorbing connecting piece 4 is movably equipped with the air inlet filter piece 6.

[0032] In addition, composite filter element 7 and auxiliary adsorption element 8 are movably installed at both ends of the shock-absorbing connector 4.

[0033] It should be noted that the outer surfaces of the composite filter element 7 and the auxiliary adsorption element 8 are both machined with through holes 9, which together with the connecting pipe 5 and the connecting pipe 2 form a complete airflow channel.

[0034] In this embodiment, the incoming air is initially intercepted by the air inlet filter 6, and the composite filter 7 and auxiliary adsorption component 8 further process the air. Combined with the complete airflow channel, it ensures that the air can flow stably through each filter component, initially improving the cleanliness of the air entering the fan coil unit 1. At the same time, the shock-absorbing connector 4 provides basic shock-absorbing support for the overall structure, reducing the transmission of vibration generated during airflow and equipment operation. Example 2

[0035] Please see Figures 1-5 Based on Example 1, this example provides a fan coil unit with an air filtration structure and a multi-layer filtration and shock absorption structure. The specific concept is as follows: The fan coil unit with air filtration structure also includes: composite filter element 7, shock-absorbing connector 4, and auxiliary adsorption element 8.

[0036] Among them, the composite filter element 7 adopts a multi-layer filtration structure.

[0037] As examples, in this embodiment, the composite filter element 7 includes: a primary filter layer 701, a medium-efficiency filter layer 702, and a high-efficiency filter layer 703.

[0038] Among them, the shock-absorbing connector 4 is provided with a primary filter layer 701 on the side near the connecting pipe 5.

[0039] In addition, the medium-efficiency filter layer 702 and the high-efficiency filter layer 703 are sequentially installed on the side of the primary filter layer 701 away from the connecting pipe 5.

[0040] It should be noted that the filtration efficiency of the pre-filter layer 701, the medium-efficiency filter layer 702, and the high-efficiency filter layer 703 shows an increasing trend.

[0041] As examples, in this embodiment, the shock-absorbing connector 4 includes: a bellows 401, a first filter frame 402, a first connecting flange 403, a second filter frame 404, and a second connecting flange 405.

[0042] Among them, the shock-absorbing connector 4 is based on the bellows 401, and a set of second connecting flanges 405 are installed at one end of the bellows 401 near the connecting pipe 5.

[0043] In addition, a set of first connecting flanges 403 are installed at one end near the connecting pipe 2.

[0044] It should be noted that the end of the second connecting flange 405 away from the bellows 401 is connected to the connecting pipe 5, and the end of the first connecting flange 403 away from the bellows 401 is connected to the connecting pipe 2.

[0045] In addition, a second filter holder 404 is movably installed between the two second connecting flanges 405.

[0046] In addition, a first filter holder 402 is movably installed between the two first connecting flanges 403.

[0047] It should be noted that the composite filter element 7 is movably assembled inside the second filter frame 404, while the auxiliary adsorption element 8 is installed inside the first filter frame 402.

[0048] In this embodiment, the multi-layer composite filter element 7 can perform step-by-step filtration of air, gradually improving the filtration accuracy from primary to high efficiency, effectively removing impurities of different particle sizes from the air; the combination of the corrugated pipe 401 and the connecting flange not only strengthens the connection stability between the connecting pipe 2 and the connecting pipe 5, but also further enhances the shock absorption effect through the elastic characteristics of the corrugated pipe 401, reducing vibration noise during equipment operation; the filter frame provides a stable mounting carrier for the composite filter element 7 and the auxiliary adsorption element 8, ensuring that the filter components are not easily displaced under airflow impact. Example 3

[0049] Please see Figures 1-5 Based on Example 2, this example provides a fan coil unit with an air filtration structure that is easy to install and disassemble. The specific concept is as follows: The fan coil unit with air filtration structure also includes: shock-absorbing connector 4 and air inlet filter 6.

[0050] As some examples, in this embodiment, the shock-absorbing connector 4 includes: a mounting bracket 406, a limiting block 407, and a connecting slot 408.

[0051] Among them, the second filter frame 404 and the first filter frame 402 of the shock-absorbing connector 4 are both movably mounted with mounting brackets 406.

[0052] Among them, the left and right sides of the mounting bracket 406 are fixed with limit blocks 407 by welding.

[0053] In addition, the second filter frame 404 and the first filter frame 402 have symmetrical connecting slots 408 machined on their left and right sides.

[0054] It should be noted that the mounting bracket 406 achieves quick assembly and disassembly with the filter frame through the cooperation of the limiting block 407 and the connecting slot 408, thereby facilitating the easy assembly and disassembly of the composite filter element 7 and the auxiliary adsorption element 8.

[0055] In addition, sealing gaskets are installed at the connections between the first connecting flange 403 and the connecting pipe 2, the second connecting flange 405 and the connecting pipe 5, and the third connecting flange 3 and the fan coil unit body 1.

[0056] As an example, in this embodiment, the auxiliary adsorption element 8 is specifically an activated carbon adsorption element 801, which is movably installed on the side of the corrugated pipe 401 near the connecting pipe 2.

[0057] As examples, in this embodiment, the air inlet filter 6 includes a pre-filter cover 601 and multiple sets of filter holes 602.

[0058] Among them, the filter holes 602 are processed through the surface of the pre-filter cover 601.

[0059] In addition, the pre-filter cover 601 is installed at the end of the connecting pipe 5 by means of a threaded connection.

[0060] It should be noted that the outer surface of the pre-filter cover 601 is designed with an outwardly convex arc shape.

[0061] In this embodiment, the snap-fit ​​structure between the mounting bracket 406 and the filter frame makes the replacement and cleaning of the composite filter element 7 and the auxiliary adsorption element 8 more convenient, without the need for complex tools, reducing maintenance costs and operational difficulty; the appropriate sealing gaskets at each flange connection can effectively fill the connection gaps, preventing unfiltered air from entering from the gaps, ensuring the sealing and filtration effect of the filtration system; the activated carbon adsorption element 801 can adsorb odors in the air, improving the comfort of the output air; the convex arc-shaped pre-filter cover 601 can increase the air intake area and reduce airflow resistance, while the threaded connection method facilitates the disassembly and cleaning of the pre-filter cover 601, and the filter holes 602 can perform preliminary filtration of large particulate impurities, reducing the burden on subsequent filtration components.

[0062] Working principle: This equipment is a fan coil unit with an air filtration structure. When in use, the main body 1 of the fan coil unit starts to run. External air enters the connecting pipe 5 after being initially filtered by the filter holes 602 of the pre-filter cover 601 to remove large particles of impurities. Then it flows through the composite filter element 7 in the second filter frame 404 inside the shock-absorbing connector 4, and passes through the primary filter layer 701, the medium-efficiency filter layer 702, and the high-efficiency filter layer 703 in a step-by-step fine filtration to remove impurities of different particle sizes. Then the air passes through the activated carbon adsorbent 801 of the auxiliary adsorbent 8 to adsorb odors, and then enters the connecting pipe 2 through the through hole 9, and finally flows into the main body 1 of the fan coil unit to complete the treatment. For routine maintenance, first turn off the power to the device. If cleaning or replacing the composite filter element 7 is required, the mounting bracket 406 inside the second filter frame 404 can be directly disassembled. By pulling out the limiting blocks 407 on both sides of the mounting bracket 406, it can be disengaged from the connecting slots 408 of the second filter frame 404. After removing the mounting bracket 406, the composite filter element 7 can be removed. When replacing the auxiliary adsorption element 8, similarly disassemble the mounting bracket 406 inside the first filter frame 402, remove the activated carbon adsorption element 801, and replace it with a new one. After maintenance, reinstall the new composite filter element 7 and auxiliary adsorption element 8 into their respective mounting brackets 406. Then, by using the limiting blocks 407 and connecting slots 408, reinstall the mounting bracket 406 into the first filter frame 402 and the second filter frame 404. After checking that all components are installed correctly, restart the device to resume operation.

[0063] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0064] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A fan coil unit with an air filtration structure, comprising: The main body of the fan coil unit (1) is characterized in that, A connecting pipe (2) is set outside the fan coil body (1), and one end of it is connected to the fan coil body (1) through a third connecting flange (3); A connecting pipe (5) is located at the other end of the connecting pipe (2), and an air inlet filter (6) is movably installed at the other end of the connecting pipe. The shock-absorbing connector (4) is located between the connecting pipe (2) and the connecting pipe (5), and its two ends are movably provided with a composite filter (7) and an auxiliary adsorption component (8). The outer surfaces of the composite filter (7) and the auxiliary adsorption component (8) are provided with through holes (9), forming a channel between them and the connecting pipe (5) and the connecting pipe (2).

2. The fan coil unit with an air filtration structure according to claim 1, characterized in that, The composite filter element (7) includes: The primary filter layer (701) is located on the side near the connecting pipe (5); The high-efficiency filter layer (703) is movably installed on the side of the primary filter layer (701); The medium-efficiency filter layer (702) is movably installed between the primary filter layer (701) and the high-efficiency filter layer (703); The filtration efficiency of the primary filter layer (701), the medium-efficiency filter layer (702), and the high-efficiency filter layer (703) increases sequentially.

3. The fan coil unit with an air filtration structure according to claim 1, characterized in that, The air inlet filter (6) includes: A pre-filter cover (601) is installed at the end of the connecting pipe (5); The filter holes (602) are provided in multiple sets and are provided through the surface of the pre-filter cover (601); The pre-filter cover (601) is connected to the end of the connecting pipe (5) by a thread, and the outer surface of the pre-filter cover (601) is in the shape of an outward convex arc.

4. The fan coil unit with an air filtration structure according to claim 3, characterized in that, The shock-absorbing connector (4) includes: A bellows (401) is disposed between the connecting pipe (2) and the connecting pipe (5); A second connecting flange (405) is provided, which is installed on one end of the bellows (401) near the connecting pipe (5); The first connecting flange (403) is provided in a set and installed at one end of the bellows (401) near the connecting pipe (2); One end of the second connecting flange (405) is connected to the connecting pipe (5), and one end of the first connecting flange (403) is connected to the connecting pipe (2).

5. The fan coil unit with an air filtration structure according to claim 1, characterized in that, The auxiliary adsorption element (8) includes: The activated carbon adsorbent (801) is movably installed on the side of the corrugated pipe (401) near the connecting pipe (2).

6. The fan coil unit with an air filtration structure according to claim 4, characterized in that, The shock-absorbing connector (4) also includes: The second filter element (404) is movably mounted between the two second connecting flanges (405); The first filter element (402) is movably mounted between the two first connecting flanges (403); The composite filter element (7) is movably installed in the second filter frame (404), and the auxiliary adsorption element (8) is installed in the first filter frame (402).

7. The fan coil unit with an air filtration structure according to claim 6, characterized in that, The shock-absorbing connector (4) also includes: Mounting bracket (406) is movably mounted in the second filter frame (404) and the first filter frame (402); The limiting block (407) is welded to the left and right sides of the mounting bracket (406); Connecting slots (408) are symmetrically arranged on the left and right sides inside the second filter frame (404) and the first filter frame (402); The mounting bracket (406) and the limiting block (407) cooperate with each other.

8. The fan coil unit with an air filtration structure according to claim 7, characterized in that, The fan coil unit with an air filtration structure also includes: Multiple sealing gaskets are provided and are respectively installed at the connection points of the first connecting flange (403), the second connecting flange (405) and the third connecting flange (3).

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