Filtering structure of central air conditioner

Abstract

The invention provides a central air conditioner filtering structure and relates to the field of air conditioner filtering. The central air conditioner filtering structure comprises two frame units, two separation nets, a filtering piece, a water absorption piece and four connecting units, each frame unit comprises a frame body, supporting plates are symmetrically and fixedly connected to the frame body, a flexible air collecting cover is fixedly connected to the portion, located below the upper supporting plate, of the frame body, and the flexible air collecting cover is fixedly connected to the portion, located below the upper supporting plate, of the frame body. A placing frame is fixedly connected to the frame body and located below the flexible air collecting cover. By arranging the flexible air collecting cover, the air inlet channel and the air outlet, a part of airflow can be collected and blown out from the air outlet to blow away dust on the windward side of the separation net, so that a large amount of dust is prevented from being gathered on the separation net, and the overall maintenance period is prolonged; and through the arranged connecting unit, internal parts can be replaced under the condition that tools are not used, the maintenance time is shortened, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning filtration, in particular to a central air conditioning filtration structure. Background Art

[0002] Central air conditioning is a device that controls different rooms by connecting multiple terminal devices through air ducts or hot and cold water pipes to achieve the purpose of indoor air conditioning. It is different from ordinary household air conditioners. Central air conditioners can be used in large-scale buildings. Since the air supply ducts of central air conditioners are connected in parallel, the rooms of large buildings are interconnected. In order to ensure the cleanliness and hygiene of the air supply, a filtering structure is needed to filter the airflow.

[0003] Currently, the commonly used filtering structure is to fill the filter material in the frame to achieve the filtering effect on the air. Commonly used materials include non-woven fiber felt and nylon mesh.

[0004] For example, in the related art, there is a central air-conditioning filter frame assembly with announcement number: CN221923755U, which includes a fixed frame, a filter frame arranged on the inner side of the fixed frame, two slide bars fixedly connected to the two sides of the filter frame, the slide bars are slidably connected to the inner side of the fixed frame, the handle is fixedly installed on the right side of the filter frame, the installation mechanism is arranged inside the left side of the fixed frame, and is used to install and fix the filter frame, and the cleaning mechanism is arranged on the inner side of the fixed frame, and is used to clean the dust on the surface of the filter frame.

[0005] In the existing technology, the filter structure used in the central air conditioner can complete the filtering function. However, a large amount of dust will accumulate on the surface of the windward component of the filter structure due to gravity or wind force, thereby shortening the maintenance cycle of the filter structure. Summary of the invention

[0006] 1. Technical issues to be solved

[0007] In view of the deficiencies in the prior art, the present invention provides a central air conditioning filter structure, which solves the problem that a large amount of dust will accumulate on the windward surface of the filter structure due to gravity or wind force, thereby shortening the maintenance cycle of the filter structure.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: a central air conditioning filter structure, comprising:

[0010] Two frame units, the frame units include a frame body, support plates are symmetrically fixedly connected to the frame body, a flexible air collecting hood is fixedly connected to the frame body and located below the upper support plate, a placement rack is fixedly connected to the frame body and located below the flexible air collecting hood, a support strip is provided between the placement rack and the lower support plate, the support strip is fixedly connected to the frame body, an air inlet channel interconnected with the flexible air collecting hood is provided on the top of the frame body, horizontal air outlets in a contracted shape are evenly provided on the upper part of the air inlet channel, and an elastic strip is fixedly connected between the upper part of the flexible air collecting hood and the frame body;

[0011] Two isolation nets, the isolation nets are installed in the gap between the support plate and the frame body, and the isolation nets are evenly provided with air inlets;

[0012] A filter element, the filter element is installed in the gap between the placement frame and the support bar;

[0013] A water absorbing member, the water absorbing member is installed on the placement frame, and the water absorbing member is evenly provided with ventilation holes;

[0014] Four connecting units are used to connect two frame units. Through the flexible air collecting hood, air inlet channel and air outlet, a part of the airflow can be collected and blown out from the air outlet to blow away the dust on the windward side of the isolation net, thereby avoiding a large amount of dust from accumulating on the isolation net and extending the overall maintenance cycle; the connecting unit can replace the isolation net, filter element and water absorbent element without using tools, shortening the maintenance time and improving the efficiency of maintenance; through the isolation net, water absorbent element and filter element, the airflow generated by the central air conditioner can be absorbed and filtered to ensure the cleanliness and hygiene of the blown airflow and improve the hygiene of use.

[0015] Preferably, the cross-section of the air inlet is in the shape of an elongated strip, and the air inlet and the air outlet are arranged alternately, so as to ensure that the airflow blown out of the air outlet can be blown to the non-air inlet to play the role of cleaning dust.

[0016] Preferably, the filter element is composed of a non-woven fabric layer, a metal mesh layer, and a glass fiber layer, and the filter element is arranged in a folded shape, and a connecting belt is fixedly connected to the filter element. The connecting belt is used to ensure the stability of the shape of the filter element, and the metal mesh is used to improve the plasticity of the filter element, so as to facilitate the adjustment of the filter element to a desired shape.

[0017] Preferably, the water absorbent is provided with an abutting slope on one side close to the frame body, and the abutting slope contacts the lower part of the flexible air collecting cover, and the water absorbent comprises a nylon layer, an activated carbon layer, and a desiccant layer. The abutting slope can ensure the stability of the water absorbent after installation, the water absorbent is not easy to shake, and no special fixing parts are required, and the manufacturing cost is low. The nylon layer, the activated carbon layer, and the desiccant layer can provide water absorption performance, and the activated carbon layer can provide a certain impurity adsorption capacity.

[0018] Preferably, the connecting unit includes a connecting left arm and a connecting right arm, the connecting left arm is fixedly connected to an end thereof close to the connecting right arm, the connecting slide bar is fixedly connected to an end thereof away from the connecting left arm, the connecting slide bar passes through the side wall of the connecting right arm, the slide bar is slidably matched with the connecting right arm, the bottom of the connecting right arm is fixedly connected to a placement base plate, the placement base plate is provided with a spring sheet, one end of the spring sheet is fixedly connected to the inner wall of the connecting right arm, and the other end of the spring sheet is fixedly connected to the slide block. When disassembly and replacement are required, a force is applied to the two frame bodies to move them away from each other, the spring sheet is compressed under the action of the pulling force, and the connecting slide bar slides out of the connecting right arm, at which time, the spacing between the connecting left arm and the connecting right arm becomes larger, at which time, the filter element, the isolation net, and the water absorbing element can be removed from the frame body, so that the filter element, the isolation net, and the water absorbing element can be replaced conveniently, and the replacement is simple and easy to operate.

[0019] Preferably, the upper and lower end surfaces of the frame body are fixedly connected with sealing strips, the bottom of the flexible air collecting cover is provided with a debris discharge port, and the debris discharge port is connected with a plug cover. The sealing strip is used to improve the sealing performance after installation, and the plug cover can be stuck in the debris discharge port to prevent the airflow from being discharged from the debris discharge port, ensuring that the collected airflow is well concentrated, and the plug cover can also be removed for convenient use of debris discharge.

[0020] Preferably, the flexible air collecting hood is composed of an inclined plate and two triangular end plates, and the angle between the inclined plate and the vertical part of the frame body is forty-five degrees.

[0021] Preferably, the left connecting arm is fixedly connected to one side of the frame body, the right connecting arm is fixedly connected to the other side of the frame body, the left connecting arm and the right connecting arm are both flat, the lower surface of the placement base is fixedly connected with a locking block, the lower surface of the sliding block is fixedly connected with a supporting column, the supporting column is slidably connected with a moving block, and the moving block is fixedly connected to the sliding block through an elastic sheet. The flat shape ensures that the overall structure is compact and occupies less space, which is suitable for the installation requirements of central air conditioners.

[0022] (III) Beneficial effects

[0023] The present invention provides a central air conditioning filter structure, which has the following beneficial effects:

[0024] 1. The flexible air collecting hood, air inlet channel and air outlet provided in the present invention can collect a part of the airflow blown out from the air outlet to blow away the dust on the windward surface of the isolation net, thereby avoiding the accumulation of a large amount of dust on the isolation net and extending the overall maintenance cycle.

[0025] 2. The present invention can absorb water and filter the airflow generated by the central air conditioner by means of the isolation net, water absorbing member and filter member, thereby ensuring the cleanliness and sanitation of the blown airflow and improving the hygienic nature of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of the present invention as a whole;

[0027] Figure 2 It is a disassembled stereogram of the frame unit of the present invention;

[0028] Figure 3 A three-dimensional diagram of the frame unit of the present invention from another perspective;

[0029] Figure 4 is a cross-sectional view of a frame unit of the present invention;

[0030] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0031] Figure 6 for Figure 1 The enlarged view of point A in the middle;

[0032] Figure 7 A three-dimensional diagram of the isolation net of the present invention;

[0033] Figure 8 is a three-dimensional diagram of the filter element of the present invention;

[0034] Fig. 9 is a three-dimensional diagram of the water-absorbing member of the present invention;

[0035] Fig.10 It is a schematic diagram of the structure of the water absorbing member of the present invention;

[0036] Fig.11 is a three-dimensional diagram of a connection unit of the present invention;

[0037] Fig.12 A bottom perspective view of the connection unit of the present invention;

[0038] Fig.13 For the present invention Fig.12 Enlarged view of point C in FIG.

[0039] Among them, 1. frame unit; 2. isolation net; 201. air inlet; 3. filter element; 301. connection belt; 4. water absorbent element; 5. connection unit; 101. frame body; 102. support bar; 103. sealing strip; 104. flexible air collecting cover; 105. placement rack; 106. plug cover; 107. air outlet; 108. impurity discharge port; 109. support plate; 110. elastic strip; 401. ventilation Mouth; 402, abutting inclined surface; 403, nylon layer; 404, activated carbon layer; 405, desiccant layer; 501, connecting left arm; 502, connecting sliding rod; 503, sliding block; 504, connecting right arm; 505, spring piece; 506, placing bottom plate; 507, locking block; 508, elastic sheet; 509, supporting column; 510, moving block; 1041, air inlet channel; 1042, bending notch. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] like Figure 1-Figure 13 As shown, an embodiment of the present invention provides a central air conditioning filter structure, comprising:

[0042] Two frame units 1, the frame unit 1 includes a frame body 101, a support plate 109 is symmetrically fixedly connected to the frame body 101, a flexible air collecting cover 104 is fixedly connected to the frame body 101 and located below the upper support plate 109, the upper and lower end surfaces of the frame body 101 are fixedly connected with sealing strips 103, the bottom of the flexible air collecting cover 104 is provided with a debris discharge port 108, and a plug cover 106 is snap-connected at the debris discharge port 108, and the flexible air collecting cover 104 is composed of an inclined plate and two triangular end plates, and the inclined plate and the vertical part of the frame body 101 are fixedly connected. The angle is forty-five degrees, a placement rack 105 is fixedly connected to the frame body 101 and located below the flexible air collecting cover 104, a support bar 102 is provided between the placement rack 105 and the lower support plate 109, the support bar 102 is fixedly connected to the frame body 101, an air inlet channel 1041 that is interconnected with the flexible air collecting cover 104 is provided on the top of the frame body 101, and a contracted horizontal air outlet 107 is evenly provided on the upper part of the air inlet channel 1041, and an elastic strip 110 is fixedly connected between the upper part of the flexible air collecting cover 104 and the frame body 101;

[0043] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 5 , Figure 6 The frame body 101 is used to provide support for the inner components and guide the flow of air. The sealing strip 103 is used to improve the sealing performance at the edge of the frame body 101 after installation. The flexible air collecting cover 104 is used to collect a part of the airflow, so that the airflow enters the air inlet channel 1041, and then blows out the horizontal airflow from the upper horizontal air outlet 107. This part of the airflow can prevent dust from falling on the edge of the isolation net 2. The opening collected by the flexible air collecting cover 104 is larger than the air outlet 107. A large amount of airflow is blown out from the contracted air outlet 107. Therefore, the strength of the airflow blown out from the air outlet 107 will be increased to a certain extent, preventing dust from gathering. Collected at the edge of the isolation net 2, the impurity outlet 108 is used to discharge impurities that fall into the air inlet channel 1041, such as small sand. The plug cover 106 can be stuck in the impurity outlet 108, which can prevent the airflow from being discharged from the impurity outlet 108, thereby ensuring that the collected airflow is well concentrated. When the vertically blown airflow becomes larger, the root of the flexible air collecting hood 104 has a bending notch 1042, and the flexible air collecting hood 104 can be bent by the airflow. The elastic strip 110 is stretched, and the opening of the flexible air collecting hood 104 is enlarged, thereby increasing the airflow entering the air inlet channel 1041, further enhancing the dust cleaning function, and is suitable for different central air-conditioning working modes with different air volumes.

[0044] Two isolation nets 2, the isolation nets 2 are installed in the gap between the support plate 109 and the frame body 101, and the isolation nets 2 are evenly provided with air inlets 201, the cross-sectional shape of the air inlets 201 is a long strip, and the air inlets 201 and the air outlets 107 are staggered;

[0045] refer to Figure 1 , Figure 8 The isolation net 2 is used to provide isolation to prevent small animals, such as mice, from entering the inner side of the frame body 101 and to prevent the components inside the frame body 101 from being damaged by small animals. The air inlet 201 is used for the entry of airflow. The long strip design can minimize the weakening of the airflow and facilitate the airflow to blow away impurities on the surface of the isolation net 2. In addition, the windward side is flat and dust is not easily retained.

[0046] A filter element 3, the filter element 3 is installed in the gap between the placement frame 105 and the support bar 102, the filter element 3 is composed of a non-woven fabric layer, a metal mesh layer, and a glass fiber layer, the filter element 3 is arranged in a folded shape, and a connecting belt 301 is fixedly connected to the filter element 3;

[0047] refer to Figure 1 , Fig. 9The filter element 3 is used to filter the airflow and improve the cleanliness of the airflow. The connecting belt 301 is used to ensure the stability of the shape of the filter element 3. The metal mesh is used to improve the plasticity of the filter element 3 and facilitate the adjustment of the filter element 3 to the required shape. For example, the edge of the filter element 3 is folded to a horizontal state for easy installation. Appropriate adjustments are made according to specific shape requirements. Both non-woven fabrics and glass fiber materials have good filtering performance.

[0048] A water absorbing member 4, the water absorbing member 4 is installed on the placement frame 105, and the water absorbing member 4 is evenly provided with ventilation holes 401. The water absorbing member 4 is provided with an abutting inclined surface 402 on one side close to the frame body 101, and the abutting inclined surface 402 is in contact with the lower part of the flexible air collecting cover 104. The water absorbing member 4 includes a nylon layer 403, an activated carbon layer 404, and a desiccant layer 405;

[0049] refer to Fig.10 , Fig.11 The vent 401 is used for the circulation of air flow, and the abutting slope 402 can ensure the stability of the water absorbent 4 after installation. The water absorbent 4 is not easy to shake and does not require special fixing parts. The manufacturing cost is low. The water absorbent 4 is used to absorb moisture in the air flow. The nylon layer 403, the activated carbon layer 404, and the desiccant layer 405 can provide water absorption performance, and the activated carbon layer 404 can provide a certain impurity adsorption capacity.

[0050] Four connecting units 5, the connecting unit 5 is used to connect the two frame units 1, the connecting unit 5 includes a connecting left arm 501 and a connecting right arm 504, the connecting left arm 501 is fixedly connected to the frame body 101 on one side, and the connecting right arm 504 is fixedly connected to the frame body 101 on the other side, the connecting left arm 501 and the connecting right arm 504 are both flat, the lower surface of the bottom plate 506 is fixedly connected with a locking block 507, the lower surface of the sliding block 503 is fixedly connected with a supporting column 509, and a moving block 510 is slidably connected to the supporting column 509, and the moving block 510 is connected to the sliding block through an elastic sheet 508 The movable block 503 is fixedly connected, the end of the left arm 501 close to the right arm 504 is fixedly connected to the connecting slide rod 502, the end of the connecting slide rod 502 away from the left arm 501 is fixedly connected to the sliding block 503, the connecting slide rod 502 passes through the side wall of the right arm 504, the sliding block 503 and the right arm 504 are slidably matched, the bottom of the right arm 504 is fixedly connected to a placing base plate 506, the placing base plate 506 is provided with a spring piece 505, one end of the spring piece 505 is fixedly connected to the inner wall of the right arm 504, and the other end of the spring piece 505 is fixedly connected to the sliding block 503.

[0051] refer to Figure 1 , Figure 2 , Fig.12 , Fig.13 , when the connection unit 5 is in the connection state, such as Fig.12As shown, under the elastic force of the spring sheet 505, the connecting left arm 501 and the connecting right arm 504 are tightly fitted together, and the two frame units 1 are connected together, which can increase the supporting force perpendicular to the direction of the connecting left arm 501. At this time, it is convenient to install and move; when the connecting unit 5 is in a disassembled state, a force is applied to the two frame bodies 101 to move away from each other. Under the action of the pulling force, the spring sheet 505 is compressed, and the connecting slide rod 502 slides out of the connecting right arm 504. At this time, the distance between the connecting left arm 501 and the connecting right arm 504 becomes larger. At this time, the filter element 3, the isolation net 2, and the water absorbent element 4 can be removed from the frame body 101, which is convenient for the filter element 3. The isolation net 2 and the water-absorbing component 4 are replaced. The replacement is simple and easy to operate. The moving block 510 moves synchronously with the sliding block 503. After encountering the inclined surface of the locking block 507, it slides along the support column 509 to the side away from the sliding block 503. The elastic sheet 508 is stretched. After the moving block 510 passes the locking block 507, it is pulled by the elastic sheet 508, and then the moving block 510 is stuck by the locking block 507 to achieve the function of keeping locked. When it is necessary to combine the left arm 501 and the right arm 504, pull the moving block 510 to the side away from the sliding block 503. After the moving block 510 is lower than the locking block 507, the sliding block 503 can slide to the initial position to achieve the combination function.

[0052] Working principle: Figure 1 When in use, the airflow blows from top to bottom toward the isolation net 2. The flexible air collecting cover 104 is used to collect a part of the airflow, allowing the airflow to enter the air inlet channel 1041, and then blows out the horizontal airflow from the upper horizontal air outlet 107. This part of the airflow can prevent dust from falling on the isolation net 2. When impurities enter the air inlet channel 1041, the plug cover 106 can be removed to discharge the impurities from the impurity discharge port 108. When impurities are not discharged, the plug cover 106 can be stuck in the impurity discharge port 108 to prevent the airflow from being discharged from the impurity discharge port 108, thereby ensuring that the collected airflow has a good concentration. The isolation net 2 is used to provide isolation, and the filter element 3 is used to filter the airflow to improve the cleanliness of the airflow. The connecting belt 301 is used In order to ensure the stability of the shape of the filter element 3, the metal mesh is used to improve the plasticity of the filter element 3, which is convenient for adjusting the filter element 3 to a desired shape. For example, the edge of the filter element 3 is folded to a horizontal state, which is convenient for installation. It is appropriately adjusted according to the specific shape requirements. The vent 401 is used for the circulation of airflow, and the abutment slope 402 can ensure the stability of the water absorbent 4 after installation. The water absorbent 4 is not easy to shake, and no special fixing parts are required, so the manufacturing cost is low. The water absorbent 4 is used to absorb moisture in the airflow. The nylon layer 403, the activated carbon layer 404, and the desiccant layer 405 can provide water absorption performance, and the activated carbon layer 404 can provide a certain amount of impurity adsorption energy. When the connecting unit 5 is in a connected state, such as Fig.12As shown, under the elastic force of the spring sheet 505, the connecting left arm 501 and the connecting right arm 504 are tightly fitted together, and the two frame units 1 are connected together, which can increase the supporting force perpendicular to the direction of the connecting left arm 501. At this time, it is convenient to install and move; when the connecting unit 5 is in a disassembled state, a force is applied to the two frame bodies 101 to move away from each other. Under the action of the pulling force, the spring sheet 505 is compressed, and the connecting slide rod 502 slides out of the connecting right arm 504. At this time, the distance between the connecting left arm 501 and the connecting right arm 504 becomes larger. At this time, the filter element 3, the isolation net 2, and the water absorbent element 4 can be removed from the frame body 101, which is convenient for the filter element 3. The isolation net 2 and the water-absorbing component 4 are replaceable, and the replacement is simple and easy to operate. The flexible air collecting hood 104, the air inlet channel 1041 and the air outlet 107 provided in the present invention can collect a part of the airflow blown out from the air outlet 107 to blow away the dust on the windward surface of the isolation net 2, thereby avoiding the accumulation of a large amount of dust on the isolation net 2 and extending the overall maintenance cycle; the connection unit 5 provided can replace the isolation net 2, the filter component 3 and the water-absorbing component 4 without using tools, thereby shortening the maintenance time and improving the maintenance efficiency; the isolation net 2, the water-absorbing component 4 and the filter component 3 provided can absorb water and filter the airflow generated by the central air conditioner to ensure the cleanliness and hygiene of the blown airflow.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A central air conditioning filter structure, characterized in that: include: Two frame units (1), the frame unit (1) comprising a frame body (101), a support plate (109) being symmetrically fixedly connected to the frame body (101), a flexible air collecting cover (104) being fixedly connected to the frame body (101) and located below the upper support plate (109), a placement rack (105) being fixedly connected to the frame body (101) and located below the flexible air collecting cover (104), the placement rack (105) being fixedly connected to the lower support plate (109), a support strip (102) is provided between the support strip (102) and the frame body (101), the support strip (102) is fixedly connected to the frame body (101), the top of the frame body (101) is provided with an air inlet channel (1041) which is interconnected with the flexible air collecting cover (104), the upper part of the air inlet channel (1041) is evenly provided with contracted horizontal air outlets (107), and an elastic strip (110) is fixedly connected between the upper part of the flexible air collecting cover (104) and the frame body (101); Two isolation nets (2), the isolation nets (2) being installed in the gap between the support plate (109) and the frame body (101), and the isolation nets (2) being evenly provided with air inlets (201); A filter element (3), the filter element (3) being installed in the gap between the placement frame (105) and the support bar (102); A water absorbing member (4), the water absorbing member (4) being mounted on a placement frame (105), and the water absorbing member (4) being evenly provided with ventilation holes (401); Four connecting units (5), wherein the connecting units (5) are used to connect two frame units (1).

2. A central air conditioning filter structure according to claim 1, characterized in that: The cross-sectional shape of the air inlet (201) is a long strip, and the air inlet (201) and the air outlet (107) are arranged alternately.

3. A central air conditioning filter structure according to claim 1, characterized in that: The filter element (3) is composed of a non-woven fabric layer, a metal mesh layer, and a glass fiber layer. The filter element (3) is arranged in a folded shape, and a connecting belt (301) is fixedly connected to the filter element (3).

4. A central air conditioning filter structure according to claim 1, characterized in that: The water absorbing member (4) is provided with an abutting inclined surface (402) on one side close to the frame body (101), the abutting inclined surface (402) being in contact with the lower part of the flexible air collecting cover (104), and the water absorbing member (4) comprises a nylon layer (403), an activated carbon layer (404), and a desiccant layer (405).

5. A central air conditioning filter structure according to claim 1, characterized in that: The connecting unit (5) comprises a connecting left arm (501) and a connecting right arm (504); one end of the connecting left arm (501) close to the connecting right arm (504) is fixedly connected to a connecting slide rod (502); one end of the connecting slide rod (502) away from the connecting left arm (501) is fixedly connected to a sliding block (503); the connecting slide rod (502) passes through the side wall of the connecting right arm (504); the sliding block (503) is slidably matched with the connecting right arm (504); the bottom of the connecting right arm (504) is fixedly connected to a placement base plate (506); a spring sheet (505) is provided on the placement base plate (506); one end of the spring sheet (505) is fixedly connected to the inner wall of the connecting right arm (504); and the other end of the spring sheet (505) is fixedly connected to the sliding block (503).

6. A central air conditioning filter structure according to claim 1, characterized in that: The upper and lower end surfaces of the frame body (101) are fixedly connected with sealing strips (103), and the bottom of the flexible air collecting cover (104) is provided with a debris discharge port (108), and a plug cover (106) is snap-connected to the debris discharge port (108).

7. A central air conditioning filter structure according to claim 1, characterized in that: The flexible air collecting cover (104) is composed of an inclined plate and two triangular end plates, and the angle between the inclined plate and the vertical part of the frame body (101) is 45 degrees.

8. A central air conditioning filter structure according to claim 5, characterized in that: The connecting left arm (501) is fixedly connected to the frame body (101) on one side, and the connecting right arm (504) is fixedly connected to the frame body (101) on the other side. The connecting left arm (501) and the connecting right arm (504) are both flat. The lower surface of the placement base plate (506) is fixedly connected with a locking block (507). The lower surface of the sliding block (503) is fixedly connected with a supporting column (509). A moving block (510) is slidably connected to the supporting column (509). The moving block (510) is fixedly connected to the sliding block (503) via an elastic sheet (508).

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