A kind of screen mesh and screen door

Abstract

The present invention relates to the field of screens, and particularly to a screen and a screen door, which include at least two inner screens and a carbon fiber layer disposed between two adjacent inner screens; an outer screen disposed at least on one side of the inner screen, and the aperture of the outer screen is larger than that of the inner screen; the wire diameter of the inner screen is greater than or equal to the aperture of the inner screen, and the mesh holes of adjacent inner screens are staggered from each other, so that when air enters the carbon fiber layer from the mesh holes of the inner screen located outdoors and then passes through the mesh holes of the inner screen located indoors, the path of the air passing through the carbon fiber layer is increased; the inner screen and the carbon fiber layer are detachably connected, which is used to replace the carbon fiber layer after its adsorption performance deteriorates, so as to restore the purification effect of the screen on the air flowing into the room. After the screen is installed on the door frame, it can play a role in purifying the air. When outdoor air enters the room through the screen, harmful substances in the air can be adsorbed by the carbon fiber layer.

Description

Technical Field

[0001] The present invention relates to the field of screen meshes, and particularly to a screen mesh and a screen door. Background Art

[0002] The screen mesh is generally installed on the screen door to block mosquitoes and the like outdoors, thereby ensuring a comfortable living environment for indoor personnel. However, with the increasingly serious air pollution, the screen mesh cannot filter harmful substances in the air.

[0003] In the patent with the application number CN202021869978.9 and the patent name of a screen mesh and a window screen using the screen mesh, the screen mesh is formed by the common interweaving of conductive wire-shaped materials and non-conductive wire-shaped materials. The conductive wire-shaped materials are in the same direction, and the conductive wire-shaped materials in the screen mesh can form a conductive path in series at the head and tail. When the screen mesh at the position where the conductive wire-shaped materials in the screen mesh are located is damaged, the conductive wire-shaped materials are disconnected, causing the conductive path formed in series to be open. The window screen uses the screen mesh and includes a window screen frame, a screen mesh, a conductive connector, and a lead wire. In addition to meeting the common mosquito prevention requirements, this device can also act as a sensitive element for detecting whether the screen mesh itself is damaged. The window screen using this screen mesh can realize the detection of window screen damage. However, it cannot play the role of filtering air, so the above technical problems are not solved. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a screen mesh and a screen door to solve the problem that the screen mesh cannot filter harmful substances in the air.

[0005] Based on the above purpose, the present invention provides a screen mesh, which includes at least two inner screen meshes and a carbon fiber layer disposed between two adjacent inner screen meshes. The screen mesh further includes at least an outer screen mesh disposed on one side of the inner screen mesh, and the aperture of the outer screen mesh is larger than that of the inner screen mesh;

[0006] The wire diameter of the inner screen mesh is greater than or equal to the aperture of the inner screen mesh, and the mesh holes of adjacent inner screen meshes are staggered from each other, so that when air enters the carbon fiber layer from the mesh holes of the inner screen mesh located outdoors and then passes through the mesh holes of the inner screen mesh located indoors, the path of the air passing through the carbon fiber layer is increased; [[ID= 23]]

[0007] The inner screen mesh is detachably connected to the carbon fiber layer for replacing the carbon fiber layer after its adsorption performance deteriorates, so as to restore the purification effect of the screen mesh on the air flowing into the room.

[0008] Further, at least three inner screen meshes are provided, so that when air flows into the room, it needs to pass through at least two layers of carbon fiber layers.

[0009] [[ID= 31]]Further, outer screen meshes are provided on both the inner and outer sides of the inner screen mesh.

[0010] Further, the screen mesh further includes a plurality of first magnetic strips embedded in the carbon fiber layer and a plurality of second magnetic strips embedded in the inner screen mesh. The first magnetic strips correspond to the second magnetic strips, and the first magnetic strips and the second magnetic strips are arranged vertically.

[0011] The present invention also provides a screen door of the screen mesh, and the screen door further includes:

[0012] The screen mesh as described above, the screen mesh is installed in the door frame, and the screen mesh includes three inner screen meshes. The three inner screen meshes form two placement spaces for placing the carbon fiber layer;

[0013] An inner cavity provided in the top of the door frame and motors symmetrically provided on both sides of the screen mesh. The motors are located in the inner cavity, and an opening is provided on the side wall of the inner cavity facing the output shaft of the motor;

[0014] A rotating shaft fixed at one end to the output shaft of the motor and a roller shaft for sleeving on the rotating shaft. After the roller shaft is sleeved on the rotating shaft, the roller shaft close to the indoor side is used to release the wound carbon fiber layer, so that the carbon fiber layer enters the placement space close to the indoor side, and the roller shaft close to the outdoor side is used to wind the carbon fiber layer, so that the carbon fiber layer in the placement space close to the outdoor side is wound; when the motor is started, it will drive the roller shaft to rotate;

[0015] A bottom cavity provided in the bottom of the door frame and a guide roller installed in the bottom cavity. After the carbon fiber layer enters one of the placement spaces, it extends into the bottom cavity and enters the other placement space after bypassing the guide roller.

[0016] Further, the screen door further includes a plurality of fixing plates provided on the inner side wall of the roller shaft. The fixing plates correspond to the surface grooves provided on the side surface of the rotating shaft. When the fixing plates enter the surface grooves, the fixing plates are slidably connected to the surface grooves.

[0017] Further, the screen door further includes side rollers symmetrically provided on both sides of the guide roller. The side rollers are located above the guide roller and are used to guide the carbon fiber layer, and the carbon fiber layer above the side rollers remains in a vertical state.

[0018] Further, a part of the carbon fiber layer is provided on the side surface of the roller shaft for winding the carbon fiber layer, and the screen door further includes:

[0019] An inner plate corresponding to the motor, and the inner plate is provided with a through groove penetrating its left and right side surfaces;

[0020] A first guide roller provided on one side of the inner plate and a second guide roller provided on the other side of the inner plate. The carbon fiber layer passing through the first guide roller and the second guide roller passes through the through groove, and the through groove penetrates the side surface of the inner plate facing the opening of the inner cavity;

[0021] A connecting part disposed inside the inner plate, where the end of the carbon fiber layer located within the placement space is positioned within the corresponding through groove, and after the end of the carbon fiber layer on the roller shaft extends into the corresponding through groove, the connecting part connects the ends of the two carbon fiber layers located within the through groove;

[0022] A cutting assembly disposed inside the inner plate, and the cutting assembly is used for cutting the carbon fiber layer.

[0023] Furthermore, the connecting part includes:

[0024] Side cavities disposed on the upper and lower sides of the through groove, cylinders and connecting plates disposed on the side walls of the side cavities facing the through groove, a perforation is provided on the side surface of the connecting plate, and the perforation is directly opposite to the output shaft of the cylinder;

[0025] A first spring with one end fixed to the side wall of the side cavity facing the through groove, and the other end of the first spring is fixed to the side surface of the connecting plate;

[0026] Side holes disposed inside the side wall of the perforation, sliding plates slidably connected to the side holes, and first electromagnets installed inside the sliding plates;

[0027] Limit holes disposed on the side walls of the side cavities and second electromagnets disposed at the bottoms of the limit holes. When the output shaft of the cylinder is away from the connecting plate, the limit holes are directly opposite to the side holes;

[0028] Bottom blocks disposed on the lower surface of the connecting plate, there are two bottom blocks, and the two bottom blocks are symmetrically disposed on both sides of the cylinder;

[0029] A flexible plate, permanent magnets disposed inside the flexible plate, and third electromagnets disposed inside the bottom blocks, the third electromagnets correspond to the permanent magnets, and when the flexible plate is placed inside the side cavity, the third electromagnets are directly opposite to the permanent magnets;

[0030] A number of pins disposed on one side surface of the flexible plate, and when the flexible plate is placed inside the side cavity, the pins face the through groove;

[0031] End plates, the end plates are provided at the ends of the carbon fiber layer on the roller shaft for releasing the carbon fiber layer and at the ends of the carbon fiber layer on the roller shaft for winding the carbon fiber layer, and the end plates are made of flexible materials.

[0032] Furthermore, the cutting assembly includes:

[0033] Side grooves disposed on the opposite side surfaces of the bottom blocks and pressing plates with ends extending into the side grooves, the ends of the pressing plates are slidably connected to the side grooves, and the side grooves penetrate the lower end surface of the bottom blocks;

[0034] A second spring with one end fixed to the side wall of the side groove facing the through groove, and the other end of the second spring is fixed to the side surface of the pressing plate;

[0035] A cutter disposed on the side of the pressing plate facing the through groove, and the cutter is close to the second guide wheel.

[0036] Advantages of the present invention: By using a kind of screen and screen door of the present invention, after the screen is installed on the door frame, it can play the role of purifying the air. When outdoor air enters the room through the screen, harmful substances in the air can be adsorbed by the carbon fiber layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 It is a side sectional view of the screen in the present invention;

[0039] Figure 2 It is a schematic diagram of the air flow direction in the screen of the present invention;

[0040] Figure 3 It is a front sectional view of the carbon fiber layer in the present invention;

[0041] Figure 4 It is a front sectional view of the inner screen in the present invention;

[0042] Figure 5 It is a side sectional view of the door frame in the present invention;

[0043] Figure 6 It is a partial enlarged view of the bottom cavity in the present invention;

[0044] Figure 7 It is a partial enlarged view of the inner cavity in the present invention;

[0045] Figure 8 It is an assembly diagram of the roller shaft and the rotating shaft in the present invention;

[0046] Figure 9 It is an assembly diagram of the motor and the rotating shaft in the present invention;

[0047] Figure 10 For Figure 7 The enlarged view at A in

[0048] Figure 11 For Figure 10 The enlarged view at B in

[0049] The marks in the figure are:

[0050] 1. Inner screen; 2. Carbon fiber layer; 3. Outer screen; 4. First magnetic strip; 5. Second magnetic strip; 6. Door frame; 7. Inner cavity; 8. Roller shaft; 9. Guide roller; 10. Side roller; 11. Rotating shaft; 12. Fixed plate; 13. Surface groove; 14. Motor; 15. First guiding roller; 16. Second guiding roller; 17. Inner plate; 18. Through groove; 19. Cylinder; 20. Side cavity; 21. Connecting plate; 22. Perforation; 23. Side hole; 24. Slide plate; 25. First electromagnet; 26. First spring; 27. Limit hole; 28. Second electromagnet; 29. Flexible plate; 30. Inserting pin; 31. Permanent magnet; 32. Third electromagnet; 33. Bottom block; 34. Pressing plate; 35. Side groove; 36. Cutter; 37. Second spring; 38. End plate; 39. Bottom cavity. Detailed implementation manner

[0051] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following further details the present invention with specific embodiments.

[0052] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those of ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0053] In the first aspect of the present invention, a screen is proposed, as Figure 1 . Figure 2 shown, including at least two inner screens 1 and a carbon fiber layer 2 disposed between two adjacent inner screens 1. The screen further includes an outer screen 3 disposed on at least one side of the inner screen 1, and the aperture of the outer screen 3 is larger than that of the inner screen 1;

[0054] The wire diameter of the inner screen 1 is greater than or equal to the aperture of the inner screen 1, and the mesh holes of adjacent inner screens 1 are staggered from each other, so that when air enters the carbon fiber layer 2 through the mesh holes of the inner screen 1 located outdoors and then passes through the mesh holes of the inner screen 1 located indoors, the path of the air passing through the carbon fiber layer 2 increases, thereby making the purification effect better;

[0055] The inner screen 1 and the carbon fiber layer 2 are detachably connected, which is used to replace the carbon fiber layer 2 after its adsorption performance deteriorates, so as to restore the purification effect of the screen on the air flowing into the room.

[0056] After the screen is installed on the door frame 6, it can play the role of purifying air. When outdoor air enters the room through the screen, harmful substances in the air can be adsorbed by the carbon fiber layer 2.

[0057] Here, preferably, as Figure 1 shown, at least three inner screens 1 are provided, so that when air flows into the room, it needs to pass through at least two carbon fiber layers 2, ensuring the air purification effect.

[0058] In addition, in order to protect the inner screen 1, as Figure 1 shown, outer screens 3 are provided on both the inner and outer sides of the inner screen 1.

[0059] As an implementation manner, as Figure 3 、 Figure 4 shown, the screen further includes a plurality of first magnetic strips 4 embedded in the carbon fiber layer 2 and a plurality of second magnetic strips 5 embedded in the inner screen 1. The first magnetic strips 4 and the second magnetic strips 5 correspond to each other, and the first magnetic strips 4 and the second magnetic strips 5 are vertically arranged, so that the carbon fiber layer 2 can be stably held between the inner screens 1.

[0060] The present invention also provides a screen door of the screen. As Figure 5 、 Figure 6 、 Figure 7 、 Figure 9 shown, the screen door further includes:

[0061] The screen as described above, the screen is installed in the door frame 6, the screen includes three inner screens 1, and the three inner screens 1 form two placement spaces for placing the carbon fiber layer 2;

[0062] An inner cavity 7 provided in the top of the door frame 6 and motors 14 symmetrically provided on both sides of the screen. The motors 14 are located in the inner cavity 7, and an opening is provided on the side wall of the inner cavity 7 facing the output shaft of the motor 14;

[0063] A rotating shaft 11 fixed to the output shaft of the motor 14 and a roller shaft 8 for sleeving on the rotating shaft 11. After the roller shaft 8 is sleeved on the rotating shaft 11, the roller shaft 8 close to the room is used to release the wound carbon fiber layer 2, so that the carbon fiber layer 2 enters the placement space close to the room, and the roller shaft 8 close to the outdoor is used to wind the carbon fiber layer 2, so that the carbon fiber layer 2 in the placement space close to the outdoor is wound; when the motor 14 is started, it will drive the roller shaft 8 to rotate;

[0064] The bottom cavity 39 provided inside the bottom of the door frame 6 and the guide roller 9 installed inside the bottom cavity 39. After the carbon fiber layer 2 enters one of the placement spaces, it extends into the bottom cavity 39, and after bypassing the guide roller 9, it enters another placement space.

[0065] In this embodiment, when the carbon fiber layer 2 absorbs enough pollutants, the carbon fiber layer 2 needs to be replaced. At this time, the motor 14 is started. One of the motors 14 releases the carbon fiber layer 2 wound around the roller shaft 8, and the other motor 14 drives the roller shaft 8 to wind up the carbon fiber layer 2 that has lost its adsorbability. When the carbon fiber layer 2 in the screen is replaced, the motor 14 stops driving.

[0066] As an implementation manner, as Figure 8 shown, the screen door further includes a plurality of fixing plates 12 provided on the inner side wall of the roller shaft 8. The fixing plates 12 correspond to the surface grooves 13 provided on the side surface of the rotating shaft 11. When the fixing plates 12 enter the surface grooves 13, the fixing plates 12 are slidably connected to the surface grooves 13, which facilitates the replacement of the roller shaft 8.

[0067] As an implementation manner, as Figure 6 shown, the screen door further includes side rollers 10 symmetrically provided on both sides of the guide roller 9. The side rollers 10 are located above the guide roller 9 and are used to guide the carbon fiber layer 2. The carbon fiber layer 2 above the side rollers 10 remains in a vertical state.

[0068] As an implementation manner, as Figure 5 、 Figure 7 、 Figure 10 shown, a part of the carbon fiber layer 2 is provided on the side surface of the roller shaft 8 for winding the carbon fiber layer 2. The screen door further includes:

[0069] An inner plate 17 corresponding to the motor 14, and the inner plate 17 is provided with a through groove 18 penetrating through its left and right side surfaces;

[0070] A first guide roller 15 provided on one side of the inner plate 17 and a second guide roller 16 provided on the other side of the inner plate 17. The carbon fiber layer 2 passing through the first guide roller 15 and the second guide roller 16 passes through the through groove 18, and the through groove 18 penetrates through the side surface of the inner plate 17 facing the inner cavity 7;

[0071] A connecting portion provided inside the inner plate 17. After the end of the carbon fiber layer 2 located in the placement space is located in the corresponding through groove 18 and the end of the carbon fiber layer 2 on the roller shaft 8 extends into the corresponding through groove 18, the connecting portion connects the two ends of the carbon fiber layer 2 located in the through groove 18;

[0072] A cutting assembly provided inside the inner plate 17, and the cutting assembly is used to cut the carbon fiber layer 2.

[0073] Since the roller 8 for winding the carbon fiber layer 2 winds up all the carbon fiber layer 2 in the placement space, it will be difficult to feed the external carbon fiber layer 2 into the placement space again. Therefore, in this embodiment, when the rollers 8 for releasing the carbon fiber layer 2 have completely released the carbon fiber layer 2 and the end of the released carbon fiber layer 2 is located in the through groove 18, the cutting assembly in the inner plate 17 corresponding to the roller for winding the carbon fiber layer 2 cuts the carbon fiber layer 2. Then, the two rollers 8 are taken out, and a new roller 8 is installed on the rotating shaft 11. At this time, there is still one roller 8 winding the carbon fiber layer 2, and the other roller 8 is used for winding the carbon fiber layer 2. At this time, the end of the carbon fiber layer 2 on the roller 8 is placed in the through groove 18, and the ends of the two carbon fiber layers 2 in the through groove 18 are connected together through the connecting portion, so as to ensure that there is always a carbon fiber layer 2 in the placement space.

[0074] As an implementation manner, as Figure 10 、 Figure 11 shown, the connecting portion includes:

[0075] Side cavities 20 provided on the upper and lower sides of the through groove 18, cylinders 19 provided on the side walls of the side cavities 20 facing the through groove 18, and connecting plates 21. A through hole 22 is provided on the side surface of the connecting plate 21, and the through hole 22 is directly opposite to the output shaft of the cylinder 19;

[0076] A first spring 26 with one end fixed to the side wall of the side cavity 20 facing the through groove 18, and the other end of the first spring 26 is fixed to the side surface of the connecting plate 21;

[0077] A side hole 23 provided in the side wall of the through hole 22, a slide plate 24 slidably connected to the side hole 23, and a first electromagnet 25 installed in the slide plate 24;

[0078] A limit hole 27 provided in the side wall of the side cavity 20 and a second electromagnet 28 provided at the bottom of the limit hole 27. When the output shaft of the cylinder 19 is far from the connecting plate 21, the limit hole 27 is directly opposite to the side hole 23;

[0079] Bottom blocks 33 provided on the lower surface of the connecting plate 21. There are two bottom blocks 33, and the two bottom blocks 33 are symmetrically provided on both sides of the cylinder 19;

[0080] A flexible plate 29, a permanent magnet 31 provided in the flexible plate 29, and a third electromagnet 32 provided in the bottom block 33. The third electromagnet 32 corresponds to the permanent magnet 31. When the flexible plate 29 is placed in the side cavity 20, the third electromagnet 32 is directly opposite to the permanent magnet 31;

[0081] A plurality of pins 30 provided on one side surface of the flexible plate 29. When the flexible plate 29 is placed in the side cavity 20, the pins 30 face the through groove 18;

[0082] End plates 38 are provided at both the end of the carbon fiber layer 2 on the roller 8 for releasing the carbon fiber layer 2 and the end of the carbon fiber layer 2 on the roller 8 for winding up the carbon fiber layer 2. The end plates 38 are made of flexible materials.

[0083] In this embodiment, when the connecting part is not in use, since the first electromagnet 25 and the second electromagnet 28 are energized, one end of the slide plate 24 is located in the corresponding limiting hole 27, thus ensuring the stability of the bottom block 33. And at this time, the through hole 22 is opened, so as to avoid damage to other components of the whole connecting part caused by the output shaft of the cylinder 19 when the switch of the cylinder 19 is misoperated. During the process of installing the roller 8 onto the rotating shaft 11, through the end plate 38, the end of the carbon fiber layer 2 on the roller 8 can conveniently penetrate into the through groove 18. Then, the flexible plate 29 is placed on the surface of the bottom plate facing the through groove 18. Then, the third electromagnet 32 is energized. Through the attracting action with the permanent magnet 31, the flexible plate 29 is temporarily stabilized on the surface of the bottom plate facing the through groove 18. After completion, the first electromagnet 25 and the second electromagnet 28 generate repulsive forces, causing the slide plates 24 to approach each other and finally sealing the through hole 22. After completion, the output shaft of the cylinder 19 extends to apply a force towards the through groove 18 to the slide plate 24 in the through hole 22, thereby driving the bottom plate to move towards the through groove 18 against the elastic force of the first spring 26. And after the pin 30 is inserted into the carbon fiber layer 2, the third electromagnet 32 is de-energized. At this time, the output shaft of the cylinder 19 contracts, and under the action of the first spring 26, the connecting plate 21 returns to its original position. At this time, the two carbon fiber layers 2 are connected together through the flexible plate 29.

[0084] As an implementation manner, as Figure 10 、 Figure 11 shown, the cutting assembly includes:

[0085] Side grooves 35 provided on opposite sides of the bottom block 33 and pressing plates 34 with ends extending into the side grooves 35. The ends of the pressing plates 34 are slidably connected to the side grooves 35, and the side grooves 35 penetrate the lower end surface of the bottom block 33;

[0086] A second spring 37 with one end fixed to the side wall of the side groove 35 facing the through groove, and the other end of the second spring 37 fixed to the side surface of the pressing plate 34;

[0087] Cutting knives 36 provided on the side surface of the pressing plate 34 facing the through groove 18, and the cutting knives 36 are close to the second guide wheel.

[0088] In this embodiment, a corresponding cutting assembly is mainly required for the roller 8 that winds the carbon fiber layer 2. When the roller 8 that winds the carbon fiber layer 2 needs to be replaced, since the perforation 22 is opened at this time, the air cylinder 19 is started. When the output shaft of the air cylinder 19 contacts the pressing plate 34, the pressing plate 34 is continuously pushed to move in the direction of the through groove 18 against the elastic force of the second spring 37, so that the cutting knife 36 finally cuts the carbon fiber layer 2 being wound.

[0089] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0090] The present invention aims to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A screen door, comprising a door frame (6), characterized in that, The screen door further includes: A screen mesh, which includes three inner screen meshes (1) and carbon fiber layers (2) disposed between two adjacent inner screen meshes (1). The screen mesh further includes outer screen meshes (3) disposed at least on one side of the inner screen meshes (1), and the aperture of the outer screen mesh (3) is larger than that of the inner screen mesh (1); The wire diameter of the inner screen mesh (1) is greater than or equal to the aperture of the inner screen mesh (1), and the mesh holes of adjacent inner screen meshes (1) are staggered from each other, so that when air enters the carbon fiber layer (2) through the mesh holes of the inner screen mesh (1) located outdoors and then passes through the mesh holes of the inner screen mesh (1) located indoors, the path of the air passing through the carbon fiber layer (2) is increased; The inner screen mesh (1) and the carbon fiber layer (2) are detachably connected, so as to replace the carbon fiber layer (2) when the adsorption performance of the carbon fiber layer (2) deteriorates and restore the purification effect of the screen mesh on the air flowing into the room; The screen mesh is installed in the door frame (6), and the three inner screen meshes (1) form two placement spaces for placing the carbon fiber layer (2); An inner cavity (7) provided in the top of the door frame (6) and motors (14) symmetrically disposed on both sides of the screen mesh. The motors (14) are located in the inner cavity (7), and an opening is provided on the side wall of the inner cavity (7) facing the output shaft of the motor (14); A rotating shaft (11) fixed to the output shaft of the motor (14) and a roller shaft (8) for sleeving on the rotating shaft (11). After the roller shaft (8) is sleeved on the rotating shaft (11), the roller shaft (8) close to the room is used to release the wound carbon fiber layer (2) so that the carbon fiber layer (2) enters the placement space close to the room, and the roller shaft (8) close to the outdoors is used to wind the carbon fiber layer (2) so that the carbon fiber layer (2) in the placement space close to the outdoors is wound; When the motor (14) is started, it will drive the roller shaft (8) to rotate; A bottom cavity (39) provided in the bottom of the door frame (6) and a guide roller (9) installed in the bottom cavity (39). After the carbon fiber layer (2) enters one of the placement spaces, it extends into the bottom cavity (39) and enters the other placement space after bypassing the guide roller (9); The screen door further includes: an inner plate (17) corresponding to the motor (14), and the inner plate (17) is provided with a through groove (18) penetrating its left and right side surfaces; A first guide roller (15) disposed on one side of the inner plate (17) and a second guide roller (16) disposed on the other side of the inner plate (17). The carbon fiber layer (2) passing through the first guide roller (15) and the second guide roller (16) passes through the through groove (18), and the through groove (18) penetrates the side surface of the inner plate (17) facing the opening of the inner cavity (7); A connecting portion provided in the inner plate (17). After the end of the carbon fiber layer (2) located in the placement space is located in the corresponding through groove (18) and the end of the carbon fiber layer (2) on the roller shaft (8) extends into the corresponding through groove (18), the connecting portion connects the ends of the two carbon fiber layers (2) located in the through groove (18); A cutting assembly disposed inside the inner plate (17), and the cutting assembly is used for cutting the carbon fiber layer (2).

2. A screen door according to claim 1, characterized in that, At least three inner wire meshes (1) are provided, so that when air flows into the room, it needs to pass through at least two carbon fiber layers (2).

3. The screen door according to claim 2, wherein Outer wire meshes (3) are provided on both the inner and outer sides of the inner wire mesh (1).

4. A screen door according to claim 3, characterized in that, The wire mesh further includes a plurality of first magnetic strips (4) embedded in the carbon fiber layer (2) and a plurality of second magnetic strips (5) embedded in the inner wire mesh (1). The first magnetic strips (4) correspond to the second magnetic strips (5), and the first magnetic strips (4) and the second magnetic strips (5) are vertically arranged.

5. A screen door according to claim 1, characterized in that, The screen door further includes a plurality of fixing plates (12) provided on the inner side wall of the roller shaft (8). The fixing plates (12) correspond to the surface grooves (13) provided on the side surface of the rotating shaft (11). When the fixing plates (12) enter the surface grooves (13), the fixing plates (12) are slidably connected to the surface grooves (13).

6. The screen door according to claim 5, characterized in that, The screen door further includes side rollers (10) symmetrically provided on both sides of the guide roller (9). The side rollers (10) are located above the guide roller (9) and are used for guiding the carbon fiber layer (2). The carbon fiber layer (2) above the side rollers (10) maintains a vertical state.

7. A screen door according to claim 1, characterized in that, The connecting part includes: Side cavities (20) provided on the upper and lower sides of the through groove (18), a cylinder (19) provided on the side wall of the side cavity (20) facing the through groove (18), and a connecting plate (21). A through hole (22) is provided on the side surface of the connecting plate (21), and the through hole (22) is directly opposite to the output shaft of the cylinder (19); A first spring (26) with one end fixed to the side wall of the side cavity (20) facing the through groove (18), and the other end of the first spring (26) is fixed to the side surface of the connecting plate (21); A side hole (23) provided in the side wall of the through hole (22), a sliding plate (24) slidably connected to the side hole (23), and a first electromagnet (25) installed in the sliding plate (24); A limiting hole (27) provided in the side wall of the side cavity (20) and a second electromagnet (28) provided at the bottom of the limiting hole (27). When the output shaft of the cylinder (19) is away from the connecting plate (21), the limiting hole (27) is directly opposite to the side hole (23); Bottom blocks (33) provided on the lower surface of the connecting plate (21). There are two bottom blocks (33), and the two bottom blocks (33) are symmetrically provided on both sides of the cylinder (19); A flexible plate (29), a permanent magnet (31) provided in the flexible plate (29), and a third electromagnet (32) provided in the bottom block (33). The third electromagnet (32) corresponds to the permanent magnet (31). When the flexible plate (29) is placed in the side cavity (20), the third electromagnet (32) is directly opposite to the permanent magnet (31); A plurality of pins (30) provided on one side surface of the flexible plate (29). When the flexible plate (29) is placed in the side cavity (20), the pins (30) face the through groove (18); End plates (38) are provided at both the end of the carbon fiber layer (2) on the roller (8) for releasing the carbon fiber layer (2) and the end of the carbon fiber layer (2) on the roller (8) for winding up the carbon fiber layer (2). The end plates (38) are made of flexible materials.

8. A screen door according to claim 7, characterized in that, The cutting assembly includes: Side grooves (35) provided on the opposite sides of the bottom block (33) and pressing plates (34) with ends extending into the side grooves (35). The ends of the pressing plates (34) are slidably connected to the side grooves (35), and the side grooves (35) penetrate the lower end surface of the bottom block (33); A second spring (37) with one end fixed to the side wall of the side groove (35) facing the through groove (18), and the other end of the second spring (37) fixed to the side surface of the pressing plate (34); A cutter (36) provided on the side surface of the pressing plate (34) facing the through groove (18), and the cutter (36) is close to the second guide wheel.

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