Fresh air elbow connecting structure and using method thereof

Abstract

The invention relates to the technical field of connecting structures, and discloses a fresh air elbow connecting structure which comprises an air inlet pipe, a filtering bin is fixedly connected to one side of the air inlet pipe, a rotating bin is fixedly connected to the outer side of the filtering bin, a rotating wheel is movably mounted in the rotating bin, and a plurality of mounting grooves are formed in the inner side of the rotating wheel at equal intervals. Adsorption blocks are fixedly mounted in the multiple mounting grooves, and the inner side of the rotating wheel is fixedly connected with a first mounting plate. According to the fresh air elbow connecting structure, through the arrangement of the rotating wheel, the adsorption block can be rapidly replaced, the shutdown time can be shortened, fresh air can be continuously filtered, through the arrangement of the limiting plate, connector ports of different sizes can be rapidly disassembled, assembled and replaced, the use requirements under different conditions are met, use of the connecting structure is facilitated, and the practicability is high. And through the arranged clamping plate, the bent pipe can be conveniently fixed, and the use efficiency of the connecting structure is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of connection structures, and particularly relates to a fresh air elbow connection structure and a using method thereof. Background Art

[0002] In a residence, a fresh air system introduces fresh air into the room through a pipeline network, and discharges the polluted air to keep the indoor air fresh. Especially in areas with poor air quality or families with special needs (such as families with allergies or asthma patients).

[0003] The fresh air pipeline is mainly used to connect the fresh air machine and the rooms that need fresh air. In families with special needs, there will be higher requirements for air quality. The existing fresh air elbow connection structure is not convenient for continuously filtering fresh air. When the fresh air elbow connection structure is in use, it is necessary to use a port to sleeve the elbow. In order to adapt to elbows of different sizes, it is often necessary to replace ports of different sizes. The existing connection structure is not convenient for quickly disassembling and replacing the elbow port. For this reason, a fresh air elbow connection structure and a using method thereof are proposed. Summary of the Invention

[0004] The main purpose of the present invention is to provide a fresh air elbow connection structure and a using method thereof, which solve the problems that in families with special needs, there are higher requirements for air quality, the existing fresh air elbow connection structure is not convenient for continuously filtering fresh air, when the fresh air elbow connection structure is in use, it is necessary to use a port to sleeve the elbow, in order to adapt to elbows of different sizes, it is often necessary to replace ports of different sizes, and the existing connection structure is not convenient for quickly disassembling and replacing the elbow port.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A fresh air elbow connection structure includes an air inlet pipe. One side of the air inlet pipe is fixedly connected with a filter chamber. The outside of the filter chamber is fixedly connected with a rotating chamber. A runner is movably installed in the rotating chamber. A plurality of installation grooves are equidistantly formed on the inner side of the runner. Adsorption blocks are fixedly installed in each of the plurality of installation grooves. A first mounting plate is fixedly connected to the inner side of the runner. An activity groove is formed on the inner side of the rotating chamber. The first mounting plate passes through the activity groove. A rotating shaft is fixedly connected to the inner side of the first mounting plate. A rotating plate is fixedly connected to the outside of the rotating shaft. A plurality of first mounting holes are equidistantly formed on the outside of the rotating plate. A sealing plate is fixedly connected to the outside of the air inlet pipe.

[0007] Further, a second mounting plate is fixedly connected to the inner side of the rotating bin. A second mounting hole is provided on one side of the second mounting plate. One end of the rotating shaft passes through the second mounting hole. A first spring is fixedly connected to the outer side of the second mounting plate. A first connecting plate is fixedly connected to the outer side of the first spring. A telescopic rod is fixedly connected to the inner side of the first connecting plate. The inner side of the telescopic rod is fixedly connected to the second mounting plate. A first mounting rod is fixedly connected to the inner side of the first connecting plate. One inner end of the first mounting rod passes through an adjacent first mounting hole.

[0008] Further, a transmission pipe is fixedly connected to one side of the filtering bin. A third mounting plate is fixedly connected to the outer side of the transmission pipe. Two first connecting grooves are equidistantly provided on the outer side of the third mounting plate. Connecting rods are movably sleeved in both of the two first connecting grooves. Limiting plates are fixedly connected to the outer sides of both of the two connecting rods.

[0009] Further, a fourth mounting plate is fixedly connected to the inner sides of both of the two connecting rods. A limiting sleeve is fixedly connected to the inner side of the fourth mounting plate. And the limiting sleeve is movably sleeved on the outer side of the transmission pipe. A fifth mounting plate is fixedly connected to one side of the transmission pipe. Two third mounting holes are equidistantly provided on the outer side of the fifth mounting plate.

[0010] Further, a second spring is fixedly connected to the outer side of the filtering bin. A transmission sleeve is fixedly connected to the outer side of the second spring. And the transmission sleeve is movably sleeved on the outer side of the transmission pipe. Two second mounting rods are equidistantly fixedly connected to the outer side of the transmission sleeve. And the two second mounting rods respectively pass through the two third mounting holes.

[0011] Further, a joint port is movably sleeved on the outer side of the transmission pipe. A sixth mounting plate is fixedly connected to the outer side of the joint port. Two second connecting grooves are equidistantly provided on the outer side of the sixth mounting plate. The two connecting rods respectively pass through the two second connecting grooves. The inner sides of the two limiting plates abut against the sixth mounting plate.

[0012] Further, two third connecting grooves are equidistantly provided on the outer side of the joint port. Clamping plates are movably installed in both of the two third connecting grooves. Second connecting plates are fixedly connected to both sides of both of the two clamping plates.

[0013] Further, fixing brackets are fixedly connected to both sides of the joint port. Fourth connecting grooves are provided on both sides of both of the two fixing brackets. The four second connecting plates respectively pass through the four fourth connecting grooves. Connecting brackets are fixedly connected to the outer sides of two adjacent second connecting plates. A third spring is fixedly connected between the two connecting brackets. Handles are fixedly connected to the outer sides of the other two adjacent second connecting plates.

[0014] A method of using a fresh air elbow connection structure, such as the above-mentioned fresh air elbow connection structure, the specific usage steps are as follows:

[0015] S1. During use, install the intake pipe and the sealing plate at the air outlet of the fresh air fan, and finally the fresh air enters the fresh air elbow inside the joint port;

[0016] S2. When the working efficiency of the original adsorption block decreases, pull the first connecting plate, the first spring contracts and drives the first mounting rod to insert into the adjacent first mounting hole through the first connecting plate, and then another adsorption block can be replaced;

[0017] S3. Press the transmission sleeve, the transmission sleeve drives the second spring to compress, and pull the joint port outwards, then the joint port can be replaced;

[0018] S4. Push the handle to both sides, the handle drives the clamping plate to move outwards through the second connecting plate. At this time, the elbow can be taken out from the joint port for disassembly and replacement.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Through the arranged runner, the present invention can quickly replace the adsorption block, reduce the downtime, and continuously filter the fresh air. When the working efficiency of the original adsorption block decreases, pull the first connecting plate, the first connecting plate drives the first spring to stretch, and the first connecting plate drives the first mounting rod to no longer be movably sleeved in the first mounting hole. At this time, the rotating plate can be rotated, and the rotating plate drives the runner to rotate in the rotating chamber through the rotating shaft and the first mounting plate until the position of the new adsorption block is aligned with the position of the filtering chamber for work. Release the first connecting plate, and the first spring contracts to drive the first mounting rod to insert into the adjacent first mounting hole through the first connecting plate. Through such a setting, the adsorption block can be quickly replaced, the downtime can be reduced, and the fresh air can be continuously filtered.

[0021] 2. Through the arranged limiting plate, the present invention can quickly disassemble, assemble and replace the joint ports of different sizes, meet the usage requirements under different conditions, and facilitate the use of the connection structure. Press the transmission sleeve, the transmission sleeve drives the second spring to compress, and at the same time the transmission sleeve drives one end of the second mounting rod to no longer be movably sleeved in the third mounting hole. At this time, rotate the limiting sleeve, and the limiting sleeve drives the limiting plate to move through the fourth mounting plate and the connecting rod until the position of the limiting plate is aligned with the second connecting groove. At this time, pull the joint port outwards, and the joint port can be replaced. Through such a setting, the joint ports of different sizes can be quickly disassembled, assembled and replaced, the usage requirements under different conditions can be met, and the use of the connection structure is facilitated.

[0022] 3. By providing the clamping plates in the present invention, the elbow pipe can be conveniently fixed, improving the usage efficiency of the connection structure. Push the handles to both sides, and the handles drive the clamping plates to move outwards through the second connecting plates until the elbow pipe is no longer clamped between the clamping plates. At the same time, the second connecting plates drive the third springs to stretch through the connecting brackets. At this time, the elbow pipe can be taken out from the joint port. Through such a setting, the elbow pipe can be conveniently fixed, improving the usage efficiency of the connection structure.

[0023] The parts not involved in this device are the same as those in the prior art or can be implemented using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the first angle of a fresh air elbow pipe connection structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the overall structure of the second angle of a fresh air elbow pipe connection structure of the present invention.

[0026] Figure 3 It is a schematic diagram of the overall structure of the third angle of a fresh air elbow pipe connection structure of the present invention.

[0027] Figure 4 It is an enlarged schematic diagram of a partial structure of the rotating bin of a fresh air elbow pipe connection structure of the present invention.

[0028] Figure 5 It is an enlarged schematic diagram of a partial structure of the runner of a fresh air elbow pipe connection structure of the present invention.

[0029] Figure 6 It is an enlarged schematic diagram of a partial structure of the second mounting plate of a fresh air elbow pipe connection structure of the present invention.

[0030] Figure 7 It is an enlarged schematic diagram of a partial structure of the transmission pipe of a fresh air elbow pipe connection structure of the present invention.

[0031] Figure 8 It is an enlarged schematic diagram of a partial structure of the limiting plate of a fresh air elbow pipe connection structure of the present invention.

[0032] Figure 9 It is an enlarged schematic diagram of a partial structure of the joint port of a fresh air elbow pipe connection structure of the present invention.

[0033] In the figure: 1, air inlet pipe; 2, sealing plate; 3, filter chamber; 4, rotating chamber; 5, runner; 6, adsorption block; 7, first mounting plate; 8, rotating plate; 9, first mounting hole; 10, movable groove; 11, second mounting plate; 12, second mounting hole; 13, first spring; 14, first connecting plate; 15, first mounting rod; 16, transmission pipe; 17, third mounting plate; 18, first connecting groove; 19, limit sleeve; 20, fourth mounting plate; 21, connecting rod; 22, limit plate; 23, fifth mounting plate; 24, third mounting hole; 25, second spring; 26, transmission sleeve; 27, second mounting rod; 28, sixth mounting plate; 29, second connecting groove; 30, joint port; 31, third connecting groove; 32, clamping plate; 33, second connecting plate; 34, fixed bracket; 35, fourth connecting groove; 36, connecting bracket; 37, third spring; 38, handle. Detailed implementation manners

[0034] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0035] As Figures 1-6 shown, a fresh air elbow connection structure includes an air inlet pipe (1). One side of the air inlet pipe (1) is fixedly connected with a filter chamber (3). The outside of the filter chamber (3) is fixedly connected with a rotating chamber (4). A runner (5) is movably installed in the rotating chamber (4). A plurality of installation grooves are equidistantly opened on the inner side of the runner (5). Adsorption blocks (6) are fixedly installed in the plurality of installation grooves. The inner side of the runner (5) is fixedly connected with a first mounting plate (7). A movable groove (10) is opened on the inner side of the rotating chamber (4). The first mounting plate (7) passes through the movable groove (10). A rotating shaft is fixedly connected to the inner side of the first mounting plate (7). A rotating plate (8) is fixedly connected to the outside of the rotating shaft. A plurality of first mounting holes (9) are equidistantly opened on the outside of the rotating plate (8). A sealing plate (2) is fixedly connected to the outside of the air inlet pipe (1). By adopting the above technical solutions, the adsorption blocks (6) can adsorb harmful air and impurities in the fresh air, improving the quality of fresh air;

[0036] The outside of the runner (5) abuts against the rotating chamber (4). A sealing rubber strip is fixedly connected to the outside of the runner (5), which can seal the gap between the runner (5) and the rotating chamber (4) in contact, so that fresh air can only pass through the adsorption blocks (6) for filtration when the installation grooves on the runner (5) are aligned with the filter chamber (3);

[0037] Sealing buckles are installed on the outside of the sealing plate (2), which can install the sealing plate (2) and the air inlet pipe (1) on the fresh air fan.

[0038] As Figures 1-6As shown in the figure, a second mounting plate (11) is fixedly connected to the inner side of the rotating bin (4). A second mounting hole (12) is formed in one side of the second mounting plate (11). One end of the rotating shaft passes through the second mounting hole (12). A first spring (13) is fixedly connected to the outer side of the second mounting plate (11). A first connecting plate (14) is fixedly connected to the outer side of the first spring (13). A telescopic rod is fixedly connected to the inner side of the first connecting plate (14). The inner side of the telescopic rod is fixedly connected to the second mounting plate (11). A first mounting rod (15) is fixedly connected to the inner side of the first connecting plate (14). One inner end of the first mounting rod (15) passes through an adjacent first mounting hole (9). By adopting the above technical solution, the telescopic rod can limit the second mounting plate (11) to move only linearly up and down.

[0039] As Figures 1-7 Figure 7 shown in the figure, a transfer pipe (16) is fixedly connected to one side of the filtering bin (3). A third mounting plate (17) is fixedly connected to the outer side of the transfer pipe (16). Two first connecting grooves (18) are equidistantly formed in the outer side of the third mounting plate (17). Connecting rods (21) are movably sleeved in both of the two first connecting grooves (18). Limit plates (22) are fixedly connected to the outer sides of both of the two connecting rods (21). Through such a setting, the shape of the first connecting groove (18) has a certain curvature;

[0040] The first connecting groove (18) can limit the connecting rod (21) to move only along the direction of the first connecting groove (18).

[0041] As Figures 1-8 shown in the figure, a fourth mounting plate (20) is fixedly connected to the inner sides of both of the two connecting rods (21). A limit sleeve (19) is fixedly connected to the inner side of the fourth mounting plate (20). And the limit sleeve (19) is movably sleeved on the outer side of the transfer pipe (16). A fifth mounting plate (23) is fixedly connected to one side of the transfer pipe (16). Two third mounting holes (24) are equidistantly formed in the outer side of the fifth mounting plate (23). Through such a setting, when the limit sleeve (19) rotates, it can drive the connecting rod (21) to rotate around the transfer pipe (16) as the axis through the fourth mounting plate (20).

[0042] As Figures 1-2 、 Figure 9 shown in the figure, a second spring (25) is fixedly connected to the outer side of the filtering bin (3). A transmission sleeve (26) is fixedly connected to the outer side of the second spring (25). And the transmission sleeve (26) is movably sleeved on the outer side of the transfer pipe (16). Two second mounting rods (27) are fixedly connected to the outer side of the transmission sleeve (26) at equal intervals. And both of the two second mounting rods (27) pass through the two third mounting holes (24) respectively. Through such a setting, the transmission sleeve (26) can only move linearly along the direction of the transfer pipe (16).

[0043] As shown in Figures 1-2 、 Figure 9 Figure, a joint port (30) is movably sleeved outside the transmission pipe (16). A sixth mounting plate (28) is fixedly connected to the outside of the joint port (30). Two second connection slots (29) are equidistantly arranged on the outside of the sixth mounting plate (28). Two connecting rods (21) respectively pass through the two second connection slots (29). The inner sides of the two limiting plates (22) abut against the sixth mounting plate (28). By adopting the above technical solution, the shape range of the second connection slot (29) is larger than that of the limiting plate (22), and the limiting plate (22) can pass through the second connection slot (29).

[0044] As shown in Figures 1-9 Figure, two third connection slots (31) are equidistantly arranged on the outside of the joint port (30). Clamping plates (32) are movably installed in both of the two third connection slots (31). Second connecting plates (33) are fixedly connected to both sides of the two clamping plates (32). With such a setting, a sealing rubber strip is installed inside the joint port (30), which can further improve the sealing effect;

[0045] During actual production, the diameter of the joint port (30) can be designed in multiple sizes to meet the installation requirements of different elbow pipes, and the external structure of the joint port (30) remains unchanged;

[0046] The fresh air elbow pipe is mainly a corrugated pipe. Wear-resistant materials are installed on the inner sides of the clamping plates (32), which can be clamped in the corrugations of the corrugated pipe to fix the fresh air elbow pipe;

[0047] A limiting baffle is installed on the third connection slot (31), which can limit the clamping plate (32) from disengaging from the third connection slot (31) during movement.

[0048] As shown in Figures 1-9 Figure, fixing brackets (34) are fixedly connected to both sides of the joint port (30). Fourth connection slots (35) are opened on both sides of the two fixing brackets (34). The four second connecting plates (33) respectively pass through the four fourth connection slots (35). Connecting brackets (36) are fixedly connected to the outside of two adjacent second connecting plates (33). A third spring (37) is fixedly connected between the two connecting brackets (36). Handles (38) are fixedly connected to the outside of the other two adjacent second connecting plates (33). With such a setting, the fixing brackets (34) and the fourth connection slots (35) can limit the second connecting plates (33) to move only up and down in a straight line;

[0049] The handle (38) can facilitate pushing the second connecting plates (33) away from each other;

[0050] The pre-tightening force of the third spring (37) is designed such that the third spring (37) can drive the clamping plate (32) to tightly clamp the fresh air elbow through the connecting bracket (36) and the second connecting plate (33).

[0051] It should be noted that during use, the intake pipe (1) and the sealing plate (2) are installed at the air outlet of the fresh air fan. Fresh air enters the filter chamber (3) through the intake pipe (1). The fresh air is filtered by the adsorption blocks (6) in the rotating chamber (4), then passes through the transmission pipe (16) and enters the joint port (30), and finally enters the fresh air elbow in the joint port (30).

[0052] When the working efficiency of the original adsorption block (6) decreases, pull the first connecting plate (14). The first connecting plate (14) drives the first spring (13) to stretch, and the first connecting plate (14) drives the first mounting rod (15) to no longer be movably sleeved in the first mounting hole (9). At this time, the rotating plate (8) can be rotated. The rotating plate (8) drives the rotating wheel (5) to rotate in the rotating chamber (4) through the rotating shaft and the first mounting plate (7) until the position of the new adsorption block (6) is aligned with the position of the filter chamber (3) for work. Release the first connecting plate (14), and the first spring (13) contracts to drive the first mounting rod (15) to insert into the adjacent first mounting hole (9) through the first connecting plate (14), and the replacement of another adsorption block (6) can be completed.

[0053] Press the transmission sleeve (26). The transmission sleeve (26) drives the second spring (25) to compress. At the same time, one end of the second mounting rod (27) driven by the transmission sleeve (26) is no longer movably sleeved in the third mounting hole (24). At this time, rotate the limit sleeve (19). The limit sleeve (19) drives the limit plate (22) to move through the fourth mounting plate (20) and the connecting rod (21) until the position of the limit plate (22) is aligned with the second connecting groove (29). At this time, pull the joint port (30) outwards to replace the joint port (30).

[0054] Push the handle (38) to both sides. The handle (38) drives the clamping plate (32) to move outwards through the second connecting plate (33) until the elbows are no longer clamped between the clamping plates (32). At the same time, the second connecting plate (33) drives the third spring (37) to stretch through the connecting bracket (36). At this time, the elbow can be taken out from the joint port (30) for disassembly and replacement.

[0055] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A fresh air elbow connection structure, including an intake pipe (1), characterized in that: One side of the intake pipe (1) is fixedly connected to a filter chamber (3). The outside of the filter chamber (3) is fixedly connected to a rotating chamber (4). A runner (5) is movably installed in the rotating chamber (4). A number of mounting grooves are equidistantly formed inside the runner (5). Adsorption blocks (6) are fixedly installed in each of the number of mounting grooves. A first mounting plate (7) is fixedly connected to the inside of the runner (5). An activity groove (10) is formed inside the rotating chamber (4). The first mounting plate (7) passes through the activity groove (10). A rotating shaft is fixedly connected to the inside of the first mounting plate (7). A rotating plate (8) is fixedly connected to the outside of the rotating shaft. A number of first mounting holes (9) are equidistantly formed on the outside of the rotating plate (8). A sealing plate (2) is fixedly connected to the outside of the intake pipe (1).

2. The fresh air elbow connection structure according to claim 1, characterized in that: A second mounting plate (11) is fixedly connected to the inside of the rotating chamber (4). A second mounting hole (12) is formed on one side of the second mounting plate (11). One end of the rotating shaft passes through the second mounting hole (12). A first spring (13) is fixedly connected to the outside of the second mounting plate (11). A first connecting plate (14) is fixedly connected to the outside of the first spring (13). A telescopic rod is fixedly connected to the inside of the first connecting plate (14). The telescopic rod is fixedly connected to the second mounting plate (11) on the inside. A first mounting rod (15) is fixedly connected to the inside of the first connecting plate (14). One end of the inside of the first mounting rod (15) passes through an adjacent first mounting hole (9).

3. The fresh air elbow connection structure according to claim 2, characterized in that: A transmission pipe (16) is fixedly connected to one side of the filter chamber (3). A third mounting plate (17) is fixedly connected to the outside of the transmission pipe (16). Two first connecting grooves (18) are equidistantly formed on the outside of the third mounting plate (17). Connecting rods (21) are movably sleeved in each of the two first connecting grooves (18). Limit plates (22) are fixedly connected to the outside of each of the two connecting rods (21).

4. The fresh air elbow connection structure according to claim 3, characterized in that: A fourth mounting plate (20) is fixedly connected to the inside of each of the two connecting rods (21). A limit sleeve (19) is fixedly connected to the inside of the fourth mounting plate (20). And the limit sleeve (19) is movably sleeved on the outside of the transmission pipe (16). A fifth mounting plate (23) is fixedly connected to one side of the transmission pipe (16). Two third mounting holes (24) are equidistantly formed on the outside of the fifth mounting plate (23).

5. A fresh air elbow connection structure according to claim 4, characterized in that: A second spring (25) is fixedly connected to the outside of the filter chamber (3). A transmission sleeve (26) is fixedly connected to the outside of the second spring (25). And the transmission sleeve (26) is movably sleeved on the outside of the transmission pipe (16). Two second mounting rods (27) are equidistantly and fixedly connected to the outside of the transmission sleeve (26). And each of the two second mounting rods (27) passes through one of the two third mounting holes (24).

6. The fresh air elbow connection structure according to claim 5, characterized in that: A joint port (30) is movably sleeved outside the transmission pipe (16). A sixth mounting plate (28) is fixedly connected to the outside of the joint port (30). Two second connection grooves (29) are equidistantly formed in the outside of the sixth mounting plate (28). The two connecting rods (21) respectively pass through the two second connection grooves (29), and the inner sides of the two limiting plates (22) abut against the sixth mounting plate (28).

7. The fresh air elbow connection structure according to claim 6, characterized in that: Two third connection grooves (31) are equidistantly formed in the outside of the joint port (30). Clamping plates (32) are movably installed in the two third connection grooves (31). Second connecting plates (33) are fixedly connected to both sides of the two clamping plates (32).

8. The fresh air elbow connection structure according to claim 7, wherein: Fixed brackets (34) are fixedly connected to both sides of the joint port (30). Fourth connection grooves (35) are formed in both sides of the two fixed brackets (34). The four second connecting plates (33) respectively pass through the four fourth connection grooves (35). Connecting brackets (36) are fixedly connected to the outside of two adjacent second connecting plates (33). A third spring (37) is fixedly connected between the two connecting brackets (36). Handles (38) are fixedly connected to the outside of the other two adjacent second connecting plates (33).

9. A method of using a fresh air elbow connection structure, characterized in that: Adopt a fresh air elbow connection structure as described in any one of claims 1-8. The specific use steps are as follows: S1. During use, install the air inlet pipe (1) and the sealing plate (2) at the air outlet of the fresh air machine. Finally, fresh air enters the fresh air elbow inside the joint port (30). S2. When the working efficiency of the original adsorption block (6) decreases, pull the first connecting plate (14). The first spring (13) contracts and drives the first mounting rod (15) to insert into the adjacent first mounting hole (9) through the first connecting plate (14), and then the work of replacing another adsorption block (6) can be completed. S3. Press the transmission sleeve (26). The transmission sleeve (26) drives the second spring (25) to compress, and pull the joint port (30) outwards to replace the joint port (30). S4. Push the handles (38) towards both sides. The handles (38) drive the clamping plates (32) to move outwards through the second connecting plates (33). At this time, the elbow can be taken out of the joint port (30) for disassembly, installation and replacement.

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