A power cabinet capable of resisting electromagnetic interference

Abstract

The present invention discloses an anti-electromagnetic interference power cabinet, belonging to the field of power cabinets. An anti-electromagnetic interference power cabinet comprises a cabinet body with a cover plate installed at the front port, and also comprises: a protective cover, fixedly sleeved around the cabinet body, wherein a circulation cavity is formed between the inner wall of the protective cover and the outer wall of the cabinet body, and a circulation part is provided between the cabinet body and the circulation cavity, and the circulation part is used to exchange air between the cabinet body and the circulation cavity; the present invention drives two reciprocating screws to rotate synchronously through a motor, and two mounting plates drive two groups of first fans to slide back and forth in the upper slot and the lower slot respectively, so that the first fan can absorb the air in the cabinet body more comprehensively, preventing only local air from being circulated, so as to significantly improve the air circulation effect and heat dissipation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power cabinets, and in particular to a power cabinet capable of resisting electromagnetic interference. Background Art

[0002] A power cabinet, also known as a distribution cabinet or switch cabinet, is a key electrical equipment used to receive, distribute and control electrical energy in a power system. It is usually made of metal and designed as a closed structure, installed in a power room or equipment room of a building or industrial facility to ensure safe and efficient management of power distribution.

[0003] The design of anti-electromagnetic interference power cabinet aims to reduce or eliminate the interference of external electromagnetic fields on the electrical equipment in the cabinet, and prevent the electromagnetic radiation generated by the equipment in the cabinet from affecting the outside world, so as to ensure the stable operation of the power system; it usually uses conductive materials to make the shell to form a continuous and closed shielding body. The shielding layer can reflect external electromagnetic waves, absorb and dissipate some energy, and prevent electromagnetic waves from entering the cabinet or escaping from the cabinet to the outside.

[0004] In the prior art, since the anti-electromagnetic interference power cabinet requires good sealing to improve its anti-electromagnetic interference capability, the heat of the electrical equipment in the power cabinet is difficult to discharge from the inside, causing the power cabinet to become a stewing tank, seriously affecting the heat dissipation efficiency of the electrical equipment in the power cabinet and causing unstable operation of the electrical equipment. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that an anti-electromagnetic interference power cabinet is difficult to effectively dissipate heat for electrical equipment, and to propose an anti-electromagnetic interference power cabinet.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An electromagnetic interference resistant power cabinet comprises a cabinet body with a cover plate installed at a front port, and also comprises: a protective cover fixedly mounted on the four sides of the cabinet body, wherein a circulation cavity is formed between the inner wall of the protective cover and the outer wall of the cabinet body, and a circulation part is provided between the cabinet body and the circulation cavity, and the circulation part is used to exchange air between the cabinet body and the circulation cavity.

[0008] In order to prevent heat from being trapped in the cabinet, preferably, the circulation part includes an upper groove and a lower groove arranged at the upper and lower ends of the cabinet, and mounting plates are installed in the upper and lower grooves for horizontal sliding, wherein the two groups of the mounting plates are fixedly installed with a first fan, and the wind directions of the two first fans are the same, and a reciprocating part for driving the mounting plate to reciprocate and translate is provided in the cabinet.

[0009] In order to improve the air circulation effect, the reciprocating part further includes two reciprocating screws rotatably connected to the upper and lower inner walls of the cabinet, and the two reciprocating screws are threadedly connected to a slide that slides with the inner wall of the cabinet, wherein the two mounting plates are respectively fixedly connected to the two slides, and the two reciprocating screws are connected by a chain drive, and a motor is installed in the cabinet to drive one of the reciprocating screws to rotate.

[0010] In order to further improve the air circulation effect, elastic cloth is fixedly installed between the mounting plate and the inner walls on both sides of the upper slot and the lower slot. When the mounting plate slides back and forth, the elastic cloth expands and contracts along the sliding direction of the mounting plate.

[0011] In order to improve the heat dissipation efficiency of electrical equipment, further, two support plates are fixedly connected to the two mounting plates, a telescopic air bag is installed between each support plate and the inner walls of the cabinet on both sides, and two front-to-back symmetrical vertical pipes are fixedly installed between the two mounting plates, wherein nozzles are fixedly installed on the opposite surfaces of the two vertical pipes, the vertical pipes are connected to the telescopic air bags, an air intake pipe is fixedly connected to the telescopic air bags, and a one-way valve is fixedly installed in the air intake pipe and the vertical pipe.

[0012] In order to facilitate rapid heat dissipation of the electrical equipment, further, a vertical plate is fixedly mounted on the inner wall of the cabinet through a support, the vertical plate is located between the two groups of vertical pipes, and air permeable grooves are provided on the vertical plates.

[0013] In order to actively dissipate the heat of the protective cover, further, an outer cover is fixedly sleeved on the outer wall of the protective cover, a heat dissipation groove is formed between the outer cover and the protective cover, an air inlet and an exhaust port are respectively provided at the upper and lower ends of the outer cover, a second fan is fixedly installed in the air inlet, wherein a top cover is fixedly connected to the top of the outer cover, air inlets are provided on both sides of the top cover, an air suction end of the second fan is located in the top cover, and a filter plate is fixedly installed in the air inlet.

[0014] In order to clean the floating dust on the outer wall of the protective cover, further, a bracket is slidably installed in the heat dissipation groove, a brush is installed on the bracket, and a movable part for driving the bracket to move up and down is provided in the heat dissipation groove.

[0015] In order to make the labor bracket slide back and forth, further, the movable part includes an active magnet fixedly connected to the mounting plate, a passive magnet attracted to the active magnet is provided on the top of the protective cover, a pull rope is fixedly connected to the passive magnet, and the end of the pull rope is fixedly connected to the bracket.

[0016] In order to improve the dust cleaning effect of the cleaning brush, further, the bracket is rotatably connected with symmetrically arranged rollers, the two rollers are in contact with the outer wall of the protective cover, and a long axis is installed between the two rollers through a one-way bearing, wherein the brush is obliquely installed on the outer wall of the long axis, and when the long axis rotates, the end of the brush is close to the outer wall of the protective cover and the inner wall of the outer cover.

[0017] Compared with the prior art, the present invention provides an electromagnetic interference resistant power cabinet, which has the following beneficial effects:

[0018] 1. The anti-electromagnetic interference power cabinet can quickly transfer the temperature in the cabinet to the inner wall of the protective cover and the outer wall of the cabinet by starting the two sets of first fans. The protective cover can complete the passive heat dissipation through the outside air to prevent the temperature of the electrical equipment from being trapped in the cabinet, thereby indirectly ensuring the operating stability of the electrical equipment.

[0019] 2. The anti-electromagnetic interference power cabinet drives two reciprocating screws to rotate synchronously through a motor, and the two mounting plates drive two sets of first fans to slide back and forth in the upper slot and the lower slot respectively, so that the first fans can absorb the air in the cabinet more comprehensively to prevent only local air from being circulated, thereby significantly improving the air circulation effect and heat dissipation efficiency.

[0020] 3. The anti-electromagnetic interference power cabinet can always block the upper slots and the lower slots on both sides of the mounting plate by setting the elastic cloth, thereby ensuring the air circulation effect of the first fan.

[0021] 4. When the anti-electromagnetic interference power cabinet squeezes the telescopic airbag through the support plate, the vertical pipe will discharge air through the nozzle and blow the air to the electrical equipment. With the cooperation of the airflow generated by the first fan, the temperature on the electrical equipment is more efficiently transferred to the flowing air, indirectly improving the heat dissipation efficiency of the electrical equipment.

[0022] 5. The anti-electromagnetic interference power cabinet will blow air to the top of the protective cover through the second fan, and the airflow will be discharged from the exhaust port along the heat dissipation groove. When the air passes through the heat dissipation groove, it can take away part of the temperature on the outer wall of the protective cover, thereby significantly improving the heat dissipation efficiency of the protective cover, indirectly improving the heat dissipation efficiency of the electrical equipment in the cabinet, and then significantly reducing the failure rate of the electrical equipment.

[0023] 6. The anti-electromagnetic interference power cabinet drives the active magnet to move synchronously through the mounting plate, and the passive magnet pulls the bracket to move back and forth up and down in the heat dissipation groove through the pull rope, thereby removing dust from the outer wall and the inner wall of the protective cover to ensure the heat dissipation efficiency of the protective cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a schematic diagram of the axonometric structure of an anti-electromagnetic interference power cabinet proposed by the present invention;

[0025] Figure 2 A schematic diagram of a partial axonometric structure of an anti-electromagnetic interference power cabinet proposed by the present invention;

[0026] Figure 3 This is a schematic diagram of the cutaway axonometric structure of an anti-electromagnetic interference power cabinet proposed by the present invention;

[0027] Figure 4 This is a schematic diagram of a partial cross-section structure of a power cabinet for resisting electromagnetic interference proposed by the present invention;

[0028] Figure 5 This is a schematic diagram of the axonometric structure of an anti-electromagnetic interference power cabinet proposed by the present invention;

[0029] Figure 6 This is a schematic diagram of the axonometric structure of a mounting plate of an anti-electromagnetic interference power cabinet proposed by the present invention;

[0030] Figure 7 This is a schematic diagram of the axonometric structure of a protective cover of an anti-electromagnetic interference power cabinet proposed by the present invention;

[0031] Figure 8 A partial exploded view of an anti-electromagnetic interference power cabinet proposed by the present invention;

[0032] Fig. 9 The invention provides an anti-electromagnetic interference power cabinet Figure 7 Schematic diagram of the structure at point A in the middle.

[0033] In the figure: 1. cabinet; 2. cover plate; 3. protective cover; 4. upper slot; 5. lower slot; 6. mounting plate; 7. first fan; 8. circulation chamber; 9. elastic cloth; 10. motor; 11. reciprocating screw; 12. slide; 13. chain drive; 14. telescopic airbag; 15. suction pipe; 16. vertical pipe; 17. nozzle; 18. support; 19. vertical plate; 20. ventilation groove; 21. outer cover; 22. exhaust port; 23. air inlet; 24. heat dissipation groove; 25. second fan; 26. brush; 27. passive magnet; 28. pull rope; 29. ​​active magnet; 30. long shaft; 31. roller; 32. one-way bearing; 33. top cover; 34. air inlet; 35. filter plate; 36. support plate; 37. bracket. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] Embodiment 1:

[0037] Reference Figure 1-Figure 9 An anti-electromagnetic interference power cabinet includes a cabinet 1 with a cover plate 2 installed at the front port, the cabinet 1 is made of anti-electromagnetic interference material, and also includes: a protective cover 3, which is fixedly sleeved around the cabinet 1, wherein a circulation cavity 8 is formed between the inner wall of the protective cover 3 and the outer wall of the cabinet 1, and a circulation part is provided between the cabinet 1 and the circulation cavity 8, and the circulation part is used to exchange air between the cabinet 1 and the circulation cavity 8.

[0038] Specifically, when in use, the circulation part can continuously exchange the air in the cabinet 1 with the air in the circulation chamber 8, so that the temperature in the cabinet 1 can be quickly transferred to the inner wall of the protective cover 3 and the outer wall of the cabinet 1. The protective cover 3 can complete passive heat dissipation through the outside air, preventing the temperature of the electrical equipment from being trapped in the cabinet 1, thereby indirectly ensuring the operating stability of the electrical equipment.

[0039] Embodiment 2:

[0040] Reference Figure 2-Figure 6 , which is basically the same as Example 1, and further discloses a specific implementation scheme of the circulation unit.

[0041] The circulation part in the anti-electromagnetic interference power cabinet includes an upper slot 4 and a lower slot 5 arranged at the upper and lower ends of the cabinet body 1, and a mounting plate 6 is installed in the upper slot 4 and the lower slot 5 for horizontal sliding. Among them, a first fan 7 is fixedly installed on the two groups of mounting plates 6, and the wind directions of the two first fans 7 are the same, and the wind directions are both set downward. A reciprocating part for driving the mounting plate 6 to reciprocate and translate is provided in the cabinet body 1.

[0042] Specifically, when in use, start the two groups of first fans 7, the bottom first fans 7 will draw the air in the cabinet 1 into the circulation chamber 8, and the bottom first fans 7 will draw the air in the circulation chamber 8 into the cabinet 1, so that the air in the cabinet 1 will be continuously exchanged with the air in the circulation chamber 8, so that the temperature in the cabinet 1 can be quickly transferred to the inner wall of the protective cover 3 and the outer wall of the cabinet 1, and the protective cover 3 can complete the passive heat dissipation through the outside air to prevent the temperature of the electrical equipment from being trapped in the cabinet 1, indirectly ensuring the operating stability of the electrical equipment, and during this period, the reciprocating part will drive the two mounting plates 6 to slide back and forth, and the two mounting plates 6 will drive the two groups of first fans 7 to slide back and forth in the upper slot 4 and the lower slot 5 respectively, so that the first fan 7 can absorb the air in the cabinet 1 more comprehensively to prevent only local air from being circulated, so as to significantly improve the air circulation effect and heat dissipation efficiency.

[0043] Elastic cloth 9 is fixedly installed between the mounting plate 6 and the inner walls of both sides of the upper slot 4 and the lower slot 5. When the mounting plate 6 slides back and forth, the elastic cloth 9 expands and contracts along the sliding direction of the mounting plate 6.

[0044] During the reciprocating sliding of the mounting plate 6, the elastic cloth 9 on both sides will elastically expand and contract in the upper slot 4 and the lower slot 5 following the mounting plate 6, so that the elastic cloth 9 always blocks the upper slot 4 and the lower slot 5 on both sides of the mounting plate 6, thereby ensuring the air circulation effect of the first fan 7.

[0045] Embodiment three:

[0046] Reference Figure 2 , Figure 3 and Figure 6 , which is basically the same as Example 2, and further discloses a specific implementation scheme of the reciprocating part.

[0047] The reciprocating part in the anti-electromagnetic interference power cabinet includes two reciprocating screws 11 rotatably connected to the upper and lower inner walls of the cabinet body 1, and the two reciprocating screws 11 are both threadedly connected to a slide 12 that slides with the inner wall of the cabinet body 1, wherein the two mounting plates 6 are respectively fixedly connected to the two slides 12, and the two reciprocating screws 11 are connected by a chain drive 13, and the chain drive 13 is composed of two sprockets and a chain, and the two sprockets are respectively installed on the two reciprocating screws 11, and a motor 10 is installed in the cabinet body 1 to drive one of the reciprocating screws 11 to rotate.

[0048] Specifically, during use, the motor 10 is started, and the motor 10 will drive one of the reciprocating screws 11 to rotate. Under the action of the chain drive 13, the two reciprocating screws 11 will rotate synchronously, thereby driving the two slides 12 to slide back and forth along the outer wall of the reciprocating screw 11, and the two slides 12 will drive the two mounting plates 6 to slide back and forth, and the two mounting plates 6 will drive the two groups of first fans 7 to slide back and forth in the upper slot 4 and the lower slot 5 respectively, so that the first fan 7 can more comprehensively absorb the air in the cabinet 1 to prevent only local air from being circulated, thereby significantly improving the air circulation effect and heat dissipation efficiency.

[0049] Two support plates 36 are fixedly connected to the two mounting plates 6, and a telescopic airbag 14 is installed between each support plate 36 and the inner walls on both sides of the cabinet 1. Two front-to-back symmetrical vertical pipes 16 are fixedly installed between the two mounting plates 6, wherein nozzles 17 are fixedly installed on the opposite surfaces of the two vertical pipes 16, and the vertical pipes 16 are connected to the telescopic airbags 14. An air intake pipe 15 is fixedly connected to the telescopic airbags 14, and a one-way valve is fixedly installed in the air intake pipe 15 and the vertical pipe 16.

[0050] Specifically, when the mounting plate 6 slides back and forth, the mounting plate 6 will drive the vertical pipe 16 to slide back and forth synchronously, and drive the support plate 36 to slide back and forth, and the support plate 36 will intermittently stretch and pressurize the telescopic airbag 14. When the telescopic airbag 14 is squeezed, the vertical pipe 16 will discharge air through the nozzle 17 and blow the air toward the electrical equipment. With the cooperation of the airflow generated by the first fan 7, the temperature on the electrical equipment is more efficiently transferred to the flowing air, indirectly improving the heat dissipation efficiency of the electrical equipment. When the telescopic airbag 14 is stretched, air is sucked in through the intake pipe 15.

[0051] The inner wall of the cabinet 1 is fixedly mounted with a vertical plate 19 via a support 18. The vertical plate 19 is located between the two groups of vertical pipes 16, and each vertical plate 19 is provided with a ventilation groove 20 for ventilation. Therefore, when installing electrical equipment, the electrical equipment is installed on the vertical plate 19, so that the nozzles 17 on both sides can blow the airflow onto the vertical plate 19 and the electrical equipment, thereby significantly improving the heat dissipation efficiency of the electrical equipment.

[0052] Embodiment 4:

[0053] Reference Figure 1-Figure 4 as well as Figure 6-Figure 9 , which is basically the same as the third embodiment, and further, a specific implementation scheme for actively dissipating heat from the protective cover 3 is specifically added.

[0054] An outer cover 21 is fixedly sleeved on the outer wall of the protective cover 3, a heat dissipation groove 24 is formed between the outer cover 21 and the protective cover 3, an air inlet 23 and an exhaust port 22 are respectively provided at the upper end and the lower end of the outer cover 21, a second fan 25 is fixedly installed in the air inlet 23, wherein a top cover 33 is fixedly connected to the top of the outer cover 21, air inlets 34 are provided on both sides of the top cover 33, an air suction end of the second fan 25 is located in the top cover 33, and a filter plate 35 for filtering dust is fixedly installed in the air inlet 34.

[0055] Specifically, during use, the second fan 25 is started, and the second fan 25 will blow air toward the top of the protective cover 3. The airflow will be discharged from the exhaust port 22 along the heat dissipation slot 24. When the air passes through the heat dissipation slot 24, part of the temperature on the outer wall of the protective cover 3 can be taken away, thereby significantly improving the heat dissipation efficiency of the protective cover 3, indirectly improving the heat dissipation efficiency of the electrical equipment in the cabinet 1, and then significantly reducing the failure rate of the electrical equipment.

[0056] When the second fan 25 sucks air, the second fan 25 will suck air into the top cover 33, and the top cover 33 will suck air through the air inlets 34 on both sides. The filter plates 35 in the air inlets 34 can reduce the pollution of dust to the protective cover 3, thereby ensuring the heat dissipation efficiency of the protective cover 3.

[0057] A bracket 37 is slidably installed in the above-mentioned heat dissipation groove 24, and a brush 26 for cleaning is installed on the bracket 37. A movable part for driving the bracket 37 to move up and down is provided in the heat dissipation groove 24, and the movable part includes an active magnet 29 fixedly connected to the mounting plate 6. A passive magnet 27 attracted to the active magnet 29 is provided on the top of the protective cover 3, and a pull rope 28 is fixedly connected to the passive magnet 27, and the end of the pull rope 28 is fixedly connected to the bracket 37.

[0058] Specifically, when the mounting plate 6 moves back and forth, the mounting plate 6 will drive the active magnet 29 to move synchronously, and the active magnet 29 will drive the passive magnet 27 to move back and forth synchronously through the magnetic attraction force. The passive magnet 27 will pull the bracket 37 through the pull rope 28 to move back and forth up and down in the heat dissipation groove 24, and the bracket 37 will drive the brush 26 to slide back and forth along the outer wall of the protective cover 3 and the inner wall of the outer cover 21, so as to remove dust on the outer wall of the protective cover 3 and the inner wall of the outer cover 21 to ensure the heat dissipation efficiency of the protective cover 3.

[0059] The bracket 37 is rotatably connected to symmetrically arranged rollers 31, and the two rollers 31 are both in contact with the outer wall of the protective cover 3. A long shaft 30 is installed between the two rollers 31 via a one-way bearing 32, wherein the brush 26 is obliquely installed on the outer wall of the long shaft 30. When the long shaft 30 rotates, the end of the brush 26 is close to the outer wall of the protective cover 3 and the inner wall of the outer cover 21.

[0060] Specifically, when the bracket 37 moves up and down, the bracket 37 will drive the roller 31 to roll back and forth on the outer wall of the protective cover 3. Since the long shaft 30 is installed on the roller 31 through the one-way bearing 32, when the roller 31 rolls upward, the long shaft 30 will not rotate, and the brush 26 on the outer wall of the long shaft 30 will also be tilted on the outer wall of the long shaft 30 without contacting the protective cover 3 and the outer cover 21. When the roller 31 rolls downward, the long shaft 30 will drive the tilted brush 26 to sweep in a circle. The brush 26 straightens under the action of centrifugal force and presses against the outer wall of the protective cover 3 and the inner wall of the outer cover 21 to complete the cleaning work, preventing the brush 26 from pushing dust away from the exhaust port 22 when moving upward, thereby avoiding dust from repeatedly contaminating the outer wall of the protective cover 3 and the inner wall of the outer cover 21.

[0061] When the anti-electromagnetic interference power cabinet is in use, the two sets of first fans 7 are started, and the first fans 7 at the bottom draw the air in the cabinet 1 into the circulation chamber 8, and the first fans 7 at the bottom draw the air in the circulation chamber 8 into the cabinet 1, so that the air in the cabinet 1 is continuously exchanged with the air in the circulation chamber 8, so that the temperature in the cabinet 1 can be quickly transferred to the inner wall of the protective cover 3 and the outer wall of the cabinet 1, and the protective cover 3 can complete the passive heat dissipation work through the external air, preventing the temperature of the electrical equipment from being suffocated in the cabinet 1, and indirectly ensuring the operation stability of the electrical equipment;

[0062] During use, the motor 10 is started, and the motor 10 will drive one of the reciprocating screws 11 to rotate. Under the action of the chain drive 13, the two reciprocating screws 11 will rotate synchronously, thereby driving the two slides 12 to slide back and forth along the outer wall of the reciprocating screw 11, and the two slides 12 will drive the two mounting plates 6 to slide back and forth, and the two mounting plates 6 will drive the two groups of first fans 7 to slide back and forth in the upper slot 4 and the lower slot 5 respectively, so that the first fan 7 can more comprehensively absorb the air in the cabinet 1 to prevent only local air from being circulated, thereby significantly improving the air circulation effect and heat dissipation efficiency.

[0063] When the mounting plate 6 slides back and forth, the mounting plate 6 will drive the vertical pipe 16 to slide back and forth synchronously, and drive the support plate 36 to slide back and forth, and the support plate 36 will intermittently stretch and pressurize the telescopic airbag 14. When the telescopic airbag 14 is squeezed, the vertical pipe 16 will discharge air through the nozzle 17 and blow the air toward the electrical equipment. With the cooperation of the airflow generated by the first fan 7, the temperature on the electrical equipment is more efficiently transferred to the flowing air, indirectly improving the heat dissipation efficiency of the electrical equipment. When the telescopic airbag 14 is stretched, air is sucked in through the intake pipe 15.

[0064] During use, the second fan 25 is started and blows air toward the top of the protective cover 3. The airflow is discharged from the exhaust port 22 along the heat dissipation slot 24. When the air passes through the heat dissipation slot 24, part of the temperature on the outer wall of the protective cover 3 can be taken away, thereby significantly improving the heat dissipation efficiency of the protective cover 3, indirectly improving the heat dissipation efficiency of the electrical equipment in the cabinet 1, and thus significantly reducing the failure rate of the electrical equipment.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electromagnetic interference resistant power cabinet, comprising a cabinet body (1) with a cover plate (2) installed at a front port, characterized in that: Also includes: A rectangular cover (3) is fixedly mounted around the cabinet (1). A circulation cavity (8) is formed between the inner wall of the rectangular cover (3) and the outer wall of the cabinet (1), and a circulation part is provided between the cabinet (1) and the circulation cavity (8), and the circulation part is used to exchange air between the cabinet (1) and the circulation cavity (8); The circulation part comprises an upper slot (4) and a lower slot (5) arranged at the upper and lower ends of the cabinet (1), and a mounting plate (6) is horizontally slidably mounted in each of the upper slot (4) and the lower slot (5). Wherein, first fans (7) are fixedly mounted on both sets of the mounting plates (6), and the wind directions of the two first fans (7) are the same, and a reciprocating part for driving the mounting plates (6) to move back and forth is provided in the cabinet (1); An outer cover (21) is fixedly sleeved on the outer wall of the rectangular cover (3), a heat dissipation groove (24) is formed between the outer cover (21) and the rectangular cover (3), an air inlet (23) and an air outlet (22) are respectively provided at the upper end and the lower end of the outer cover (21), and a second fan (25) is fixedly installed in the air inlet (23). The top of the outer cover (21) is fixedly connected to a top cover (33), both sides of the top cover (33) are provided with air inlets (34), the air intake end of the second fan (25) is located in the top cover (33), and a filter plate (35) is fixedly installed in the air inlet (34); A bracket (37) is slidably mounted in the heat dissipation groove (24), a brush (26) is mounted on the bracket (37), and a movable part for driving the bracket (37) to move up and down is provided in the heat dissipation groove (24); The bracket (37) is rotatably connected to symmetrically arranged rollers (31), the two rollers (31) are both fitted to the outer wall of the rectangular cover (3), and a long shaft (30) is installed between the two rollers (31) via a one-way bearing (32). The brush (26) is installed obliquely on the outer wall of the long shaft (30), and when the long shaft (30) rotates, the end of the brush (26) is close to the outer wall of the rectangular cover (3) and the inner wall of the outer cover (21).

2. The anti-electromagnetic interference power cabinet according to claim 1, characterized in that: The reciprocating portion comprises two reciprocating screws (11) rotatably connected to the upper and lower inner walls of the cabinet (1), and the two reciprocating screws (11) are both threadedly connected to a slide table (12) that slides with the inner wall of the cabinet (1). The two mounting plates (6) are respectively fixedly connected to the two slides (12), the two reciprocating screws (11) are connected via a chain drive (13), and a motor (10) for driving one of the reciprocating screws (11) to rotate is installed in the cabinet (1).

3. The anti-electromagnetic interference power cabinet according to claim 1, characterized in that: Elastic cloth (9) is fixedly mounted between the mounting plate (6) and the inner walls of both sides of the upper slot (4) and the lower slot (5); when the mounting plate (6) slides back and forth, the elastic cloth (9) expands and contracts along the sliding direction of the mounting plate (6).

4. The anti-electromagnetic interference power cabinet according to claim 1, characterized in that: Two support plates (36) are fixedly connected to the two mounting plates (6), a telescopic air bag (14) is installed between each support plate (36) and the inner walls of the cabinet (1) on both sides, and two vertical pipes (16) are fixedly installed between the two mounting plates (6) in a front-to-back symmetrical manner. Wherein, nozzles (17) are fixedly mounted on opposite surfaces of the two vertical pipes (16); the vertical pipes (16) are connected to the telescopic airbag (14); an air suction pipe (15) is fixedly connected to the telescopic airbag (14); and one-way valves are fixedly mounted in the air suction pipe (15) and the vertical pipes (16).

5. The anti-electromagnetic interference power cabinet according to claim 4, characterized in that: A vertical plate (19) is fixedly mounted on the inner wall of the cabinet (1) via a support (18); the vertical plate (19) is located between two groups of vertical pipes (16), and each vertical plate (19) is provided with a ventilation groove (20).

6. The anti-electromagnetic interference power cabinet according to claim 1, characterized in that: The movable part comprises an active magnet (29) fixedly connected to the mounting plate (6); a passive magnet (27) attracted to the active magnet (29) is provided on the top of the rectangular cover (3); a pull rope (28) is fixedly connected to the passive magnet (27); and an end of the pull rope (28) is fixedly connected to the bracket (37).

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