Anti-interference combined filter

Abstract

The invention relates to the technical field of filters, in particular to an anti-interference combined filter which comprises a shielding box, the shielding box comprises a bottom plate, a plurality of resonance parts are evenly and fixedly installed on the top face of the bottom plate, a plurality of cavity partition walls are fixed to the top face of the bottom plate, and the anti-interference combined filter is characterized in that side plates are fixed to the two sides of the top face of the bottom plate; ventilation plates are fixed to the two ends of the top face of the bottom plate, and each ventilation plate comprises a supporting panel. According to the invention, the interior of the ventilation plate is rotatably connected with a plurality of arc-shaped sealing plates, air flow transmitted through the ventilation plate each time is buffer air flow between two adjacent arc-shaped sealing plates, and the arc-shaped sealing plates separate the shielding box from the outside. The internal environment of the shielding box is effectively prevented from being communicated with the outdoor environment when the shielding box carries out air flow exchange heat dissipation, and electromagnetic shielding of the shielding box is not affected by ventilation and heat dissipation of the shielding box while ventilation and heat dissipation of the shielding box are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of filters, in particular to an anti-interference combined filter. Background Art

[0002] A filter is a circuit that effectively filters out a specific frequency point or frequencies outside the frequency point. It is a device that processes signals. Its function is to block unwanted signals, obtain a specific frequency or eliminate a specific frequency. A filter is also called a signal frequency filter. Among them, cavity filters are a commonly used type of filters because they have a very large power capacity, which can reach tens or even hundreds of watts, and their insertion loss is very low, generally at the order of 0.5dB, so they are widely used.

[0003] When processing signals, filters often involve the transmission and filtering of high-frequency electromagnetic waves. In order to ensure that these signals will not be disturbed by the external environment and to avoid interference to the outside world caused by electromagnetic leakage of the filter, the filter is generally installed inside a shielding box to achieve the effect of electromagnetic shielding. In order to enable the filter to effectively dissipate heat when used in a high-temperature and dry environment, air holes are generally opened at both ends of the shielding box to cooperate with fan blades for heat dissipation. However, the air holes will directly connect the shielding box to the outside world, affecting the sealing effect of the shielding box itself, resulting in poor electromagnetic shielding effect. Summary of the invention

[0004] The object of the present invention is to provide an anti-interference combined filter to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An anti-interference combined filter, comprising a shielding box, the shielding box includes a bottom plate, the top surface of the bottom plate is uniformly and fixedly provided with a plurality of resonant elements, and a plurality of cavity partition walls are fixedly arranged on the top surface of the bottom plate. It is characterized in that side plates are fixedly arranged on both sides of the top surface of the bottom plate, ventilation plates are fixedly arranged at both ends of the top surface of the bottom plate, the ventilation plate includes a support panel, outer shell plates and inner shell plates are respectively fixedly arranged on both sides of the support panel, a support cylinder is rotatably connected to the outer shell plate, a circular through hole I is formed on the support panel, the support cylinder extends into the interior of the circular through hole I and is fixedly provided with a circular box, a plurality of arc-shaped sealing plates are rotatably connected to the outer side of the circular box at equal angles in a ring shape, a plurality of wetting mechanisms are arranged at equal angles in a ring shape inside the circular box, a crescent-shaped block for restricting the position of the arc-shaped sealing plate is fixedly arranged on the inner side of the circular through hole I, a connection hole I communicating with the circular through hole I is formed inside the support panel, a circular through hole II communicating with the circular through hole I is formed at the bottom of the support panel, a motor fixedly connected to the inner shell plate is arranged inside the circular through hole II, a fan blade is fixedly arranged at the output end of the motor, and a toothed ring for driving the support cylinder to rotate is meshed and driven on the outer side of the output end of the motor.

[0007] Furthermore: A cover plate is fixedly arranged at the top of the side plate and the ventilation plate, and an input port and an output port are respectively electrically connected to both ends of the shielding box.

[0008] Furthermore: The connection hole I penetrates through the inner shell plate, an air delivery pipe communicated and fixed with the connection hole I is arranged inside the shielding box, two branch pipes are communicated and fixed on the outer side of the air delivery pipe, and electromagnetic valves are serially installed inside the branch pipes and at one end of the air delivery pipe背离 the connection hole I.

[0009] Furthermore: A sealing plug is detachably fixed at one end of the support cylinder penetrating through the outer shell plate, and an annular mesh hole communicated with the circular box is formed on the outer side of the support cylinder.

[0010] Furthermore: The wetting mechanism includes a U-shaped plate fixedly connected to the inner side of the circular box, a return spring is fixedly arranged on the bottom surface of the U-shaped plate, a movable cylinder slidably inserted into the circular box is fixedly arranged at the bottom end of the return spring, and a plurality of drain holes are uniformly fixed on the outer side of the movable cylinder.

[0011] Furthermore: The circular through hole II penetrates through the outer shell plate, a filter screen is fixedly arranged on the open side of the outer shell plate close to the circular through hole II, and a gear meshed and driven with the toothed ring is fixedly arranged at the output end of the motor.

[0012] Furthermore: A bracket fixedly connected to the support cylinder is fixedly arranged on the inner ring of the toothed ring, and the bracket is located inside the outer shell plate.

[0013] Furthermore, fixed seats are evenly fixed on the outer side of the circular box, a rotating shaft is fixed between two adjacent fixed seats, and a rotating seat rotatably sleeved with the rotating shaft is fixed on one end of the arc-shaped sealing plate.

[0014] Furthermore, a torsion spring is sleeved between the rotating seat and the rotating shaft, a soft magnetic layer is embedded and fixed inside the arc-shaped sealing plate, and a sponge block is embedded and fixed inside the arc-shaped sealing plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The motor drives the fan blades to rotate and suck the outside wind into the second circular through hole, and then transmits it to the first circular through hole from the second connecting hole on the second circular through hole. The output end of the motor drives the fan blades to rotate while the gear drives the gear ring to rotate. The gear ring drives the support tube to rotate so that the multiple arc-shaped sealing plates outside the circular box rotate with the support tube as the axis. During the rotation of the multiple arc-shaped sealing plates, the airflow between the two adjacent arc-shaped sealing plates can be pushed to the position of the first connecting hole, and then transmitted to the inside of the shielding box through the air pipe. At the same time, the motor on the other ventilation plate drives the fan blades to rotate and suck the airflow inside the first circular through hole, so that the airflow inside the shielding box can The air flow is sucked and discharged from a connecting hole on another ventilation plate to the outside world. In addition, the air flow inside the shielding box is transported from the connecting hole to the outside world through the circular through hole, and the air flow from the outside is transported to the inside of the shielding box through the circular through hole, the connecting hole, and the two air flow circulation processes are both blocked by the arc sealing plate. Each transmitted air flow is a buffered air flow between two adjacent arc sealing plates, which effectively prevents the internal environment of the shielding box from being connected to the external environment during the process of air flow exchange and heat dissipation. Thereby, the shielding box can be prevented from being directly connected to the outside world while ensuring the ventilation and heat dissipation of the shielding box, so that the electromagnetic shielding of the shielding box is not affected by the ventilation and heat dissipation of the shielding box.

[0017] 2. By opening the sealing plug at one end of the support tube, an appropriate amount of water is transported into the support tube, and the water flows into the round box through the annular mesh. When the support tube rotates with the round box, when the arc-shaped sealing plate rotates to the position between the crescent-shaped block and the round box, the inner side of the arc-shaped sealing plate will squeeze the movable tube, and the movable tube moves toward the inside of the round box. The water inside the round box will flow to the sponge block position of the arc-shaped sealing plate through the drainage hole on the movable tube. The sponge block absorbs the water, and then as the support tube rotates, the sponge block on the arc-shaped sealing plate can be rotated to the position facing the second connecting hole. At this time, the airflow blown out from the second connecting hole will blow onto the sponge block, and the water vapor on the sponge block will evaporate, thereby preventing the airflow inside the round box to be transported to the inside of the shielding box from drying up, and also preventing the filter working in a dry environment from generating static electricity that affects the normal operation of electrical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the shielding box in the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional state structure of the split of the support panel and the outer shell plate in the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional state structure of the split of the support panel and the inner shell plate in the present invention;

[0022] Figure 5 It is a schematic diagram of the internal structure of the first circular through hole in the present invention;

[0023] Figure 6 It is a schematic diagram of the support cylinder and the wetting mechanism structure in the present invention;

[0024] Figure 7 It is a schematic diagram of the toothed ring, motor, and gear structure in the present invention;

[0025] Figure 8 It is a schematic diagram of the support panel structure in the present invention.

[0026] In the figure: 100, shielding box; 110, bottom plate; 111, resonant member; 112, cavity partition wall; 120, side plate; 130, ventilation plate; 131, support panel; 1311, first circular through hole; 1312, first connection hole; 1313, second connection hole; 1314, second circular through hole; 132, outer shell plate; 133, inner shell plate; 134, crescent-shaped block; 140, cover plate; 150, input port; 160, output port; 170, air delivery pipe; 171, branch pipe; 200, support cylinder; 210, annular mesh hole; 220, sealing plug; 300, circular box; 310, fixed seat; 400, arc-shaped sealing plate; 410, rotating seat; 420, sponge block; 500, wetting mechanism; 510, C-shaped plate; 520, return spring; 530, movable cylinder; 531, drain hole; 600, motor; 610, fan blade; 620, toothed ring; 621, bracket; 630, gear. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1

[0029] Please refer to Figure 1-8 In an embodiment of the present invention, an anti-interference combination filter includes a shielding box 100, the shielding box 100 includes a bottom plate 110, a plurality of resonators 111 are evenly mounted and fixed on the top surface of the bottom plate 110, a plurality of cavity partition walls 112 are fixed on the top surface of the bottom plate 110, and the side plates 120 are fixed on both sides of the top surface of the bottom plate 110, a ventilation plate 130 is fixed on both ends of the top surface of the bottom plate 110, the ventilation plate 130 includes a support panel 131, an outer shell plate 132 and an inner shell plate 133 are respectively fixed on both sides of the support panel 131, a support cylinder 200 is rotatably connected to the outer shell plate 132, a circular through hole 1311 is opened on the support panel 131, and a circular box 300 is fixed inside the support cylinder 200 extending to the circular through hole 1311, The outer side of the circular box 300 is connected with a plurality of arc-shaped sealing plates 400 in a circular shape and rotatably connected at equal angles, the inner side of the circular box 300 is provided with a plurality of wetting mechanisms 500 in a circular shape and equiangularly arranged, a crescent-shaped block 134 for limiting the position of the arc-shaped sealing plate 400 is fixed to the inner side of the circular through hole 1311, a connecting hole 1312 communicating with the circular through hole 1311 is provided inside the support panel 131, a circular through hole 2 1314 communicating with the circular through hole 1 1311 is provided at the bottom of the support panel 131, a motor 600 fixedly connected with the inner shell plate 133 is arranged at the temporal part of the circular through hole 2 1314, a fan blade 610 is fixed to the output end of the motor 600, and a gear ring 620 for driving the support cylinder 200 to rotate is provided at the outer side of the output end of the motor 600 in meshing transmission.

[0030] Specifically, ventilation plates 130 are installed at both ends of the shielding box 100, and the fan blades 610 inside one ventilation plate 130 rotate to pump external airflow into the shielding box 100, and the fan blades 610 inside the other ventilation plate 130 rotate to discharge the airflow inside the shielding box 100 to the outside, thereby improving the ventilation and heat dissipation efficiency of the shielding box 100. A plurality of arc-shaped sealing plates 400 are connected and rotated inside the ventilation plate 130, and each airflow transmitted through the ventilation plate 130 is a buffered airflow between two adjacent arc-shaped sealing plates 400. The arc-shaped sealing plates 400 separate the shielding box 100 from the outside, effectively preventing the internal environment of the shielding box 100 from being connected to the outdoor environment when the shielding box 100 is performing airflow exchange and heat dissipation, thereby ensuring the ventilation and heat dissipation of the shielding box 100 while ensuring that the electromagnetic shielding of the shielding box 100 is not affected by the ventilation and heat dissipation of the shielding box 100.

[0031] like Figure 1 As shown, in this embodiment, a cover plate 140 is fixed to the top of the side plate 120 and the ventilation plate 130, and the two ends of the shielding box 100 are electrically connected to the input port 150 and the output port 160, respectively. This part is a prior art component of the filter, and the specific working principle of the filter is not described in detail.

[0032] like Figure 2As shown, in the present embodiment, a connection hole 1312 passes through the inner shell plate 133, and an air pipe 170 connected and fixed to the connection hole 1312 is arranged inside the shielding box 100, and two branch pipes 171 are connected and fixed to the outside of the air pipe 170, and solenoid valves are installed in series inside the branch pipe 171 and at one end of the air pipe 170 away from the connection hole 1312.

[0033] The air pipe 170 transports the airflow delivered from the connecting hole 1312 to different chambers through the branch pipe 171, so as to facilitate the heat dissipation of the resonant components 111 at different positions. In addition, by controlling the switches of the solenoid valves at different positions, the airflow inside the air pipe 170 can be directed to the designated position for heat dissipation.

[0034] like Figure 3 and Figure 7 As shown, in this embodiment, the second circular through hole 1314 passes through the outer shell plate 132, and a filter is fixed to the open side of the outer shell plate 132 near the second circular through hole 1314, and a gear 630 meshing with the gear ring 620 is fixed to the output end of the motor 600, and a bracket 621 fixedly connected to the support tube 200 is fixed to the inner ring of the gear ring 620, and the bracket 621 is located inside the outer shell plate 132.

[0035] Thereby, the motor 600 rotates the gear 630, the gear 630 rotates the gear ring 620, the gear ring 620 rotates the support tube 200, and the support tube 200 rotates the multiple arc-shaped sealing plates 400, thereby achieving the effect of circulating sealing of the shielding box 100. In addition, the diameter of the gear 630 is smaller than the diameter of the gear ring 620, thereby making the rotation speed of the support tube 200 smaller than the rotation speed of the fan blade 610, so that the fan blade 610 can transport a large amount of airflow to the position between two adjacent arc-shaped sealing plates 400.

[0036] like Figure 5 As shown, in this embodiment, a fixing seat 310 is evenly fixed on the outer side of the circular box 300, a rotating shaft is fixed between two adjacent fixing seats 310, a rotating seat 410 rotatably sleeved with the rotating shaft is fixed at one end of the arc-shaped sealing plate 400, a torsion spring is sleeved between the rotating seat 410 and the rotating shaft, a soft magnetic layer is embedded and fixed inside the arc-shaped sealing plate 400, and a sponge block 420 is embedded and fixed on the inner side of the arc-shaped sealing plate 400.

[0037] In this embodiment, the soft magnetic layer can effectively shield external electromagnetics and improve the electromagnetic shielding effect of the arc sealing plate 400. The shielding principle of the soft magnetic layer is the existing technology and is not elaborated here. The elastic force of the torsion spring enables the arc sealing plate 400 to be in an expansion trend at all times, so that the arc sealing plate 400 can be rotated in the crescent-shaped block 134 and the circular through hole 1311 to abut against the side walls of the crescent-shaped block 134 and the circular through hole 1311, so as to automatically adjust the state of the arc sealing plate 400 to seal the shielding box 100 and buffer the airflow.

[0038] During the specific implementation, the motor 600 rotates with the fan blades 610 to suck the external wind into the circular through hole 1314, and then transmits it to the circular through hole 1311 from the connecting hole 1313 on the circular through hole 1314. The output end of the motor 600 rotates with the fan blades 610 and at the same time, it rotates with the gear ring 620 through the gear 630. The gear ring 620 rotates with the support tube 200 to make the multiple arc-shaped sealing plates 400 outside the circular box 300 rotate with the support tube 200 as the axis. During the rotation of the multiple arc-shaped sealing plates 400, the airflow between the two adjacent arc-shaped sealing plates 400 can be pushed to the position of the connecting hole 1312, and then transmitted to the inside of the shielding box 100 through the air supply pipe 170. At the same time, the motor 600 on the other ventilation plate 130 rotates with the fan blades 610 to suck the circular through hole 1311. The internal airflow enables the airflow inside the shielding box 100 to be sucked and discharged to the outside from a connecting hole 1312 on another ventilation plate 130. The airflow inside the shielding box 100 is transported from the connecting hole 1312 to the outside through the circular through hole 1311, and the external airflow is transported to the inside of the shielding box 100 through the circular through hole 1311 and the connecting hole 1312. Both airflow circulation processes are blocked by the arc-shaped sealing plate 400. Each transmitted airflow is the buffered airflow between two adjacent arc-shaped sealing plates 400, which prevents the internal environment of the shielding box 100 from being connected to the external environment during the process of airflow exchange and heat dissipation of the shielding box 100. While ensuring the ventilation and heat dissipation of the shielding box 100, it can prevent the shielding box 100 from being directly connected to the outside, so that the electromagnetic shielding of the shielding box 100 is not affected by the ventilation and heat dissipation of the shielding box 100.

[0039] Embodiment 2

[0040] On the basis of the first embodiment, in order to prevent the airflow entering the shielding box 100 in a dry environment from being too dry, the electrical components on the filter are prevented from being affected in their operation due to factors such as static electricity generated by dryness.

[0041] like Figure 6As shown, in this embodiment, a sealing plug 220 is detachably fixed to one end of the support cylinder 200 passing through the outer shell plate 132. An annular mesh hole 210 communicating with the circular box 300 is formed on the outer side of the support cylinder 200. The wetting mechanism 500 includes a U-shaped plate 510 fixedly connected to the inner side of the circular box 300. A return spring 520 is fixed to the bottom surface of the U-shaped plate 510. The bottom end of the return spring 520 is fixed with a movable cylinder 530 slidably inserted into the circular box 300. A plurality of drain holes 531 are uniformly fixed on the outer side of the movable cylinder 530.

[0042] Specifically, when the environment is dry, the sealing plug 220 on the support cylinder 200 can be opened, and an appropriate amount of water is conveyed into the support cylinder 200. The water flows into the circular box 300 through the annular mesh hole 210. During the rotation of the support cylinder 200 with the circular box 300, when the arc-shaped sealing plate 400 rotates to the position between the crescent-shaped block 134 and the circular box 300, the inner side of the arc-shaped sealing plate 400 will squeeze the movable cylinder 530, and the movable cylinder 530 moves into the circular box 300. The water inside the circular box 300 will flow through the drain holes 531 on the movable cylinder 530 to the position of the sponge block 420 on the arc-shaped sealing plate 400. The sponge block 420 absorbs the water, and then as the support cylinder 200 rotates, the sponge block 420 on the arc-shaped sealing plate 400 can rotate to the position facing the second connection hole 1313. The air flow blown out from the second connection hole 1313 will blow onto the sponge block 420, and the water vapor on the sponge block 420 evaporates, so that the air flow to be conveyed into the shielding box 100 inside the circular box 300 will not be too dry.

[0043] In the present invention, the differences in the internal structures of the two ventilation plates 130 are mainly reflected in the angular distribution of the fan blades 610 and whether the wetting mechanism 500 is installed inside the circular box 300. The purpose of the different angular arrangements of the fan blades 610 on the two ventilation plates 130 is to enable one fan blade 610 to rotate to convey the outdoor air flow into the shielding box 100, and the other fan blade 610 to rotate to convey the air flow inside the shielding box 100 to the outside. The wetting mechanism 500 is installed inside the ventilation plate 130 that can convey the air flow inside the shielding box 100 to the outside, and the wetting of the air mainly occurs at the air inlet end of the shielding box 100.

[0044] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An anti-interference combination filter, comprising a shielding box (100), the shielding box (100) comprising a bottom plate (110), a plurality of resonant elements (111) being evenly mounted and fixed on the top surface of the bottom plate (110), a plurality of cavity partition walls (112) being fixed on the top surface of the bottom plate (110), characterized in that: On both sides of the top surface of the bottom plate (110), side plates (120) are fixed. At both ends of the top surface of the bottom plate (110), ventilation plates (130) are fixed. The ventilation plate (130) includes a support panel (131). On both sides of the support panel (131), an outer shell plate (132) and an inner shell plate (133) are respectively fixed. A support cylinder (200) is rotatably connected to the outer shell plate (132). A circular through-hole one (1311) is formed on the support panel (131). The support cylinder (200) extends into the interior of the circular through-hole one (1311) and is fixed with a circular box (300). A plurality of arc-shaped sealing plates (400) are rotatably connected to the outer side of the circular box (300) at equal angles in a ring shape. A plurality of wetting mechanisms (500) are arranged in a ring shape at equal angles inside the circular box (300). Inside the circular through-hole one (1311), a crescent-shaped block (134) for restricting the position of the arc-shaped sealing plate (400) is fixed. A connection hole one (1312) communicating with the circular through-hole one (1311) is formed inside the support panel (131). A circular through-hole two (1314) communicating with the circular through-hole one (1311) is formed at the bottom of the support panel (131). Inside the circular through-hole two (1314), a motor (600) fixedly connected to the inner shell plate (133) is arranged. The output end of the motor (600) is fixed with a fan blade (610). Outside the output end of the motor (600), a gear ring (620) for driving the support cylinder (200) to rotate is meshed and driven.

2. The anti-interference combined filter according to claim 1, characterized in that: A cover plate (140) is fixed to the top of the side plate (120) and the ventilation plate (130). Input ports (150) and output ports (160) are respectively electrically connected to both ends of the shielding box (100).

3. The anti-interference combined filter according to claim 1, characterized in that: The connection hole one (1312) penetrates through the inner shell plate (133). Inside the shielding box (100), an air delivery pipe (170) fixedly connected and communicating with the connection hole one (1312) is arranged. On the outer side of the air delivery pipe (170), two branch pipes (171) are fixedly connected and communicated. Solenoid valves are installed in series inside the branch pipes (171) and at the end of the air delivery pipe (170)背离 the connection hole one (1312).

4. The anti-interference combined filter according to claim 1, characterized in that: One end of the support cylinder (200) penetrating through the outer shell plate (132) is detachably fixed with a sealing plug (220). A ring-shaped mesh hole (210) communicating with the circular box (300) is formed on the outer side of the support cylinder (200).

5. The anti-interference combined filter according to claim 1, characterized in that: The wetting mechanism (500) includes a U-shaped plate (510) fixedly connected to the inner side of the circular box (300). A return spring (520) is fixed to the bottom surface of the U-shaped plate (510). The bottom end of the return spring (520) is fixed with a movable cylinder (530) slidably inserted into the circular box (300). A plurality of drain holes (531) are uniformly fixed on the outer side of the movable cylinder (530).

6. The anti-interference combined filter according to claim 1, characterized in that: The circular through-hole two (1314) penetrates through the outer shell plate (132). A filter screen is fixed to the open side of the outer shell plate (132) near the circular through-hole two (1314). The output end of the motor (600) is fixed with a gear (630) meshed and driven with the gear ring (620).

7. The anti-interference combined filter according to claim 6, characterized in that: The inner ring of the gear ring (620) is fixed with a bracket (621) which is fixedly connected to the support tube (200), and the bracket (621) is located inside the outer shell plate (132).

8. The anti-interference combined filter according to claim 1, characterized in that: The outer side of the circular box (300) is evenly fixed with fixed seats (310), a rotating shaft is fixed between two adjacent fixed seats (310), and one end of the arc-shaped sealing plate (400) is fixed with a rotating seat (410) rotatably sleeved with the rotating shaft.

9. The anti-interference combined filter according to claim 8, characterized in that: A torsion spring is sleeved between the rotating seat (410) and the rotating shaft, a soft magnetic layer is embedded and fixed inside the arc-shaped sealing plate (400), and a sponge block (420) is embedded and fixed inside the arc-shaped sealing plate (400).

Images