Automatic fire extinguishing type electromagnetic shielding cabinet

Abstract

The invention discloses an automatic fire extinguishing type electromagnetic shielding cabinet, which comprises a cabinet body, an equipment mounting plate is arranged in the cabinet body, and a plurality of wind shielding strips are rotatably connected in a ventilation pipeline; the fire extinguishing assembly comprises a carbon dioxide fire extinguisher, a plugging plate and an elastic piece; the automatic linkage assembly comprises a driving rod and two switching movable frames, the equipment mounting plate is provided with a guide sleeve, a memory alloy telescopic structure is arranged between the driving rod and the guide sleeve, the driving rod is in linkage fit with the two switching movable frames, and the switching movable frames are in linkage fit with the plugging plate. The switching movable frame is in linkage fit with the corresponding air blocking strips. According to the automatic fire extinguishing type electromagnetic shielding cabinet, circuit dependence is omitted, the ventilation pipeline is automatically blocked, the carbon dioxide fire extinguisher is released, ventilation is recovered after fire extinguishing and cooling, harmful gas is exhausted in time, harm of a fire disaster to personnel and equipment is reduced, and safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shielding cabinets, and in particular to an automatic fire-extinguishing type electromagnetic shielding cabinet. Background Art

[0002] Electromagnetic shielding cabinet is an electromagnetic shielding device that effectively suppresses the leakage of computer electromagnetic information and prevents strong external electromagnetic interference from affecting the normal operation of the computer. Electromagnetic shielding cabinets need ventilation and heat dissipation when working. Usually, electromagnetic shielding cabinets are equipped with smoke sensors. When a fire occurs in the cabinet, once the smoke concentration is detected to be too high, the alarm system will be triggered, notifying relevant personnel and starting the fire extinguishing plan. Carbon dioxide fire extinguishers are a common choice for extinguishing electrical fires. Carbon dioxide can isolate oxygen, thereby inhibiting combustion. Because it is non-conductive, it will not cause secondary damage such as short circuits to electrical equipment. Manual fire extinguishing is difficult to handle the fire in time and it is difficult to control the spread of the fire in time. When extinguishing the fire, it is necessary to open the cabinet to extinguish the fire point. After the fire occurs, smoke and toxic gases will spread to the surrounding environment, which will cause harm to personnel and other equipment. Automatic fire extinguishing systems mostly rely on sensor triggers, but there is also a risk that the circuit is damaged when a fire occurs, causing the automatic fire extinguishing to fail to start. Summary of the invention

[0003] The purpose of the present invention is to design an automatic fire extinguishing electromagnetic shielding cabinet to solve the deficiencies of the above-mentioned technology. It eliminates circuit dependence and uses a memory alloy telescopic structure to drive a driving rod to automatically block the ventilation duct and release a carbon dioxide fire extinguisher. After extinguishing the fire and cooling down, ventilation is restored and harmful gases are discharged in time, reducing the harm of fire to personnel and equipment and improving safety.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: an automatic fire extinguishing electromagnetic shielding cabinet, comprising: A cabinet body, wherein an equipment mounting plate is arranged inside the cabinet body, at least one side of the cabinet body is opened, a cabinet door is hingedly connected to the cabinet body, a ventilation duct is arranged in communication with the top and bottom of the cabinet body, and a plurality of windshield strips distributed in an array are rotatably connected in the ventilation duct; A fire extinguishing assembly, the fire extinguishing assembly comprising a carbon dioxide fire extinguisher, a blocking plate and an elastic member, the carbon dioxide fire extinguisher being arranged on the inner side wall of the cabinet door, the carbon dioxide fire extinguisher being provided with a gas supply joint communicating with the interior thereof, the blocking plate being slidably connected to the inner side wall of the cabinet door, the blocking plate being penetrated with an air outlet corresponding to the gas supply joint, the elastic member being arranged between the blocking plate and the cabinet door, so that the blocking plate has a tendency to move upward, and the air outlet and the gas supply joint are staggered in position; An automatic linkage component, which includes a driving rod and two switching movable frames. The equipment mounting plate is provided with a guide sleeve for the driving rod to pass through, and a memory alloy telescopic structure is provided between the driving rod and the guide sleeve. The top and bottom ends of the driving rod are respectively linked with the two switching movable frames, and the two switching movable frames are respectively slidably connected to the top and bottom of the cabinet body, at least one of the switching movable frames is linked with the blocking plate, and the switching movable frame and its corresponding wind shield strips are linked with each other.

[0005] Preferably, there are several equipment mounting plates, each of which is arranged at intervals along the height direction of the cabinet body to divide the interior of the cabinet body into several installation spaces, and the equipment mounting plates are penetrated with several filter holes to connect the installation spaces.

[0006] Preferably, the number of the carbon dioxide fire extinguishers in the fire extinguishing assembly is several, and each of the gas supply connectors corresponds to each of the installation spaces.

[0007] Preferably, the top and bottom ends of the driving rod are both driving ends, and a first driving surface inclined downward is formed on the side of the switching movable frame close to the driving rod, and the first driving surface and the corresponding driving end are abutted against each other, so that when the driving rod moves upward along its axial direction, the switching movable frame is linked to move outward.

[0008] Preferably, a second driving surface inclined downward is formed on the side of the switching movable frame away from the driving rod, and the second driving surface is abutted against the upper part of the corresponding blocking plate, so that the blocking plate is linked to move downward when the switching movable frame translates outward.

[0009] Preferably, a driving strip is provided on a side wall of the switching movable frame away from the installation space, a driving gear is provided at the end of the windshield strip, and the driving strip and the corresponding driving gears are meshed with each other.

[0010] Preferably, the switching movable frame comprises two opening and closing frames that are spaced apart and arranged opposite to each other, the first driving surface is formed on the opposite sides of the two adjacent opening and closing frames, and the second driving surface is formed on the side of the opening and closing frame away from the driving end; the wind shield strips in the ventilation duct are divided into two groups, the two groups of wind shield strips are arranged opposite to each other and respectively arranged along the two adjacent opening and closing frames, and the switching movable frame is provided with two driving strips, and the two driving strips are respectively provided on the two opening and closing frames.

[0011] Preferably, two parallel and spaced apart supporting structures are provided on the top and bottom of the cabinet body, the opening and closing frame is slidably connected to the corresponding supporting structures, a first magnetic block is provided on opposite sides of two adjacent supporting structures, the opening and closing frame is provided with a second magnetic block, and the magnetic force between the first magnetic block and the second magnetic block is an attractive force.

[0012] Preferably, the ventilation duct located at the top of the cabinet body is an air outlet, and the ventilation duct located at the bottom of the cabinet body is an air inlet, and fans are provided at both the air outlet and the air inlet.

[0013] Preferably, a pressure relief interface connected to the interior of the cabinet body is provided on the top of the cabinet body, and a safety valve is provided in the pressure relief interface.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When a fire occurs inside the cabinet body, the high temperature inside the cabinet body causes the memory alloy telescopic structure to extend, and the memory alloy telescopic structure drives the driving rod to move upward to link the switching movable frame to translate outward. When the switching movable frame translates outward, the blocking plate is also linked to move downward, so that the air outlet is connected to the gas supply connector, so that the gas supply connector of the carbon dioxide fire extinguisher releases carbon dioxide gas into the cabinet body through the air outlet to extinguish the fire. In this process, the switching movable frame links the wind shields to block the ventilation duct, prevent air convection from assisting combustion and the spread of toxic smoke, and ensure that there is sufficient carbon dioxide gas inside the cabinet body, thereby improving the fire extinguishing efficiency.

[0015] 2. After the fire is extinguished, the temperature inside the cabinet body decreases, the memory alloy telescopic structure shrinks and deforms, and the driving rod moves downward and resets. Under the action of the elastic member, the blocking plate moves up and resets to offset the position of the air outlet and the gas supply joint to block the gas supply joint. In the process of moving the blocking plate up, the movable frame is switched inward and returned to its original position, driving each wind shield strip to reset and then opening the ventilation duct, thereby timely discharging harmful gases in the cabinet body.

[0016] 3. The electromagnetic shielding cabinet eliminates circuit dependence and uses the memory alloy telescopic structure to drive the driving rod to automatically block the ventilation duct and release the carbon dioxide fire extinguisher. After the fire is extinguished and the temperature is reduced, ventilation is restored and harmful gases are discharged in time, reducing the harm of fire to personnel and equipment and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the electromagnetic shielding cabinet in the embodiment; Figure 2 is a cross-sectional view of the bottom of the cabinet body in the embodiment; Figure 3 4 is a cross-sectional view of the top of the cabinet body in the embodiment.

[0018] In the figure: 1. cabinet body; 2. equipment installation plate; 201. guide sleeve; 202. filter hole; 3. cabinet door; 4. ventilation duct; 5. wind shield; 6. fire extinguishing assembly; 61. carbon dioxide fire extinguisher; 62. blocking plate; 63. elastic member; 7. gas transmission joint; 8. air outlet; 9. automatic linkage assembly; 91. driving rod; 92. switching activity frame; 921. opening and closing frame; 10. memory alloy telescopic structure; 11. installation space; 12. driving end; 13. first driving surface; 14. second driving surface; 15. driving strip; 16. driving gear; 17. supporting structure; 18. first magnetic block; 19. second magnetic block; 20. fan; 21. pressure relief interface; 22. safety valve; 23. mounting frame; 24. limiting ring; 25. blocking ring; 26. limiting plate; 27. positioning ring; 28. heat conduction structure. DETAILED DESCRIPTION

[0019] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0020] refer to Figure 1 , Figure 2 , Figure 3 An automatic fire extinguishing electromagnetic shielding cabinet includes a cabinet body 1, two fire extinguishing components 6 and an automatic linkage component 9. The cabinet body 1 is provided with openings on both the front and rear sides. The cabinet body 1 is hinged with a cabinet door 3. The cabinet door 3 cooperates with the cabinet body 1 to block the corresponding openings. Three equipment mounting plates 2 are arranged inside the cabinet body 1. Each equipment mounting plate 2 is arranged at intervals along the height direction of the cabinet body 1 to divide the interior of the cabinet body 1 into three installation spaces 11. The installation space 11 is used for installing computer equipment such as servers, switches, disk arrays, and power supplies. The equipment mounting plate 2 is penetrated with a plurality of filter holes 202 to connect each installation space 11.

[0021] The top and bottom of the cabinet body 1 are both connected and provided with a ventilation duct 4, which is a square tube. A plurality of wind shield strips 5 distributed in an array are rotatably connected in the ventilation duct 4. The ventilation duct 4 located at the top of the cabinet body 1 is the air outlet end, and the ventilation duct 4 located at the bottom of the cabinet body 1 is the air inlet end. Fans 20 are provided at both the air outlet end and the air inlet end. When the cabinet body 1 is ventilated, the fan 20 at the air inlet end blows air into the cabinet body 1, and the fan 20 at the air outlet end discharges the air in the cabinet body 1 to the outside through the corresponding ventilation duct 4, thereby ensuring the stable operation of each device in the cabinet body 1.

[0022] The fire extinguishing assembly 6 is arranged on the inner wall of the cabinet door 3, and the fire extinguishing assembly 6 includes three carbon dioxide fire extinguishers 61, a sealing plate 62 and three elastic members 63. The carbon dioxide fire extinguisher 61 is fixedly connected to the inner wall of the cabinet door 3 and the carbon dioxide fire extinguisher 61 is provided with a gas supply connector 7 connected to the interior thereof, and each gas supply connector 7 corresponds to each installation space 11 respectively.

[0023] The inner wall of the cabinet door 3 is provided with a plurality of mounting frames 23 arranged at intervals along its height direction. The mounting frames 23 are penetrated with a limit ring 24 for the sealing plate 62 to slide up and down, so that the sealing plate 62 can be slidably connected to the inner wall of the cabinet door 3 and conflict with the gas supply connector 7. The gas supply connector 7 is provided with a sealing ring 25. The sealing plate 62 is penetrated with an air outlet 8 corresponding to the gas supply connector 7. The elastic member 63 is arranged between the sealing plate 62 and the mounting frame 23 at the bottom of the cabinet door 3, so that the sealing plate 62 has a tendency to move upward. A limit plate 26 is provided at the bottom of the sealing plate 62. The limit plate 26 conflicts with the mounting frame 23 located at the bottom of the cabinet body 1 to limit the upward movement of the sealing plate 62. The position between the air outlet 8 and the gas supply connector 7 is staggered to block the gas supply connector 7.

[0024] The automatic linkage assembly 9 includes a driving rod 91 and two switching movable frames 92. The equipment mounting plate 2 is provided with a guide sleeve 201 for the driving rod 91 to pass through. Each guide sleeve 201 is coaxially arranged. A memory alloy telescopic structure 10 is arranged between the driving rod 91 and the guide sleeve 201. The memory alloy telescopic structure 10 is a spring structure made of memory alloy. The memory alloy telescopic structure 10 is sleeved on the driving rod 91. When the temperature rises to its phase transition temperature, the memory alloy telescopic structure 10 extends to drive the driving rod 91 to extend upward. When its temperature drops to its phase transition temperature, the memory alloy telescopic structure 10 shrinks and resets. It is a prior art and will not be described in detail here. Preferably, a heat-conducting structure 28 is coaxially arranged on the top surface of the guide sleeve 201. The heat-conducting structure 28 is a tube body made of ceramic or metal material. The driving rod 91 is movably sleeved with the heat-conducting structure 28, and the driving rod 91 is lifted and translated along the axial direction of the heat-conducting structure 28.

[0025] The switching movable frame 92 includes two opening and closing frames 921 that are spaced apart and arranged opposite to each other. The top and bottom of the cabinet body 1 are both provided with two parallel and spaced supporting structures 17. The opening and closing frames 921 are slidably connected to the corresponding supporting structures 17, so that the two switching movable frames 92 are respectively slidably connected to the top and bottom of the cabinet body 1. The opposite sides of the two adjacent supporting structures 17 are both provided with first magnetic blocks 18, and the opening and closing frames 921 are provided with second magnetic blocks 19. The magnetic force between the first magnetic block 18 and the second magnetic block 19 is an attractive force, so that the two opening and closing frames 921 have a tendency to approach each other, so as to realize the automatic resetting of the switching movable frame 92.

[0026] The top and bottom ends of the driving rod 91 are respectively linked with the two switching movable frames 92. The driving rod 91 is located between the two corresponding adjacent opening and closing frames 921. The top and bottom ends of the driving rod 91 are both driving ends 12. The opposite sides of the two adjacent opening and closing frames 921 are formed with a first driving surface 13. The first driving surface 13 and its corresponding driving end 12 are in contact with each other, so that when the driving rod 91 moves upward along its axial direction, the two opening and closing frames 921 are linked to move outward. A second driving surface 14 inclined downward is formed on the side of the opening and closing frame 921 away from the driving end 12. The second driving surface 14 and the upper part of the corresponding blocking plate 62 are in contact with each other, so that when the opening and closing frame 921 is translated outward, the corresponding blocking plate 62 is linked to move downward, thereby realizing the linkage and cooperation between the switching movable frame 92 and the blocking plate 62.

[0027] The windshield strips 5 in the ventilation duct 4 are divided into two groups, and the two groups of windshield strips 5 are arranged opposite to each other and respectively arranged along two adjacent opening and closing frames 921. Two driving strips 15 are provided on the side wall of the switching movable frame 92 away from the installation space 11. The two driving strips 15 are respectively arranged on the two opening and closing frames 921. The ends of the windshield strips 5 are provided with driving gears 16. The driving strips 15 and the corresponding driving gears 16 are meshed with each other to realize the linkage and cooperation between the switching movable frame 92 and the corresponding windshield strips 5. The driving strips 15 drive the corresponding windshield strips 5 to rotate synchronously through the gear rack transmission, and the opening and closing frame 921 translates outward to link the windshield strips 5 to move closer to each other to block the corresponding ventilation duct 4, and the opening and closing frame 921 retreats inward to link the windshield strips 5 to move away from each other to open the corresponding ventilation duct 4.

[0028] When a fire occurs inside the cabinet body 1, the high temperature inside the cabinet body 1 causes the memory alloy telescopic structure 10 to extend, and the memory alloy telescopic structure 10 drives the driving rod 91 to move upward to link the switching movable frame 92 to translate outward. Under the guidance of the first driving surface 13, the opening and closing frame 921 overcomes the magnetic attraction of the first magnetic block 18 and the second magnetic block 19 and translates outward and away from the corresponding driving end 12. Under the guidance of the second driving surface 14, the opening and closing frame 921 links the blocking plate 62 to overcome the elastic member 63 and translates downward. The top of the driving rod 91 is fixedly connected with the positioning ring 27. When the driving When the rod 91 moves up to its position, the top surface of the positioning ring 27 contacts the corresponding supporting structure 17, and the opposite sides of the two opening and closing frames 921 contact the corresponding driving ends 12. At this time, the air outlet 8 is connected to the gas supply connector 7, so that the gas supply connector 7 of the carbon dioxide fire extinguisher 61 releases carbon dioxide gas into the cabinet body 1 through the air outlet 8 to extinguish the fire. In this process, the switching movable frame 92 links the wind shields to block the ventilation duct 4, prevent air convection from assisting combustion and the spread of toxic smoke, and ensure that there is sufficient carbon dioxide gas inside the cabinet body 1 to improve the fire extinguishing efficiency.

[0029] Preferably, the gas connector 7 can be designed as a temperature-sensitive glass ball. When the gas outlet 8 is connected to the gas connector 7, the flame or hot air flow contacts the gas connector 7, thereby breaking the temperature-sensitive glass ball and realizing the rapid opening of the carbon dioxide fire extinguisher 61 for carbon dioxide fire extinguishing.

[0030] Preferably, a pressure relief interface 21 connected to the interior of the cabinet body 1 is provided at the top, a safety valve 22 is provided in the pressure relief interface 21, and the pressure relief interface 21 is connected to an external recovery pipe. The safety valve 22 is a prior art and will not be described in detail here. When both ventilation ducts 4 are closed, the safety valve 22 can monitor and control the internal air pressure of the cabinet body 1. When the air pressure is too high, the safety valve 22 opens, and the internal gas of the cabinet body 1 is discharged separately through the pressure relief interface 21 into the collection and treatment of harmful gases, thereby avoiding excessive internal air pressure in the cabinet body 1 and effectively preventing harmful gases from diffusing to the external environment, ensuring personal safety and reducing the pollution of the surrounding environment by fire.

[0031] After the fire is extinguished, the internal temperature of the cabinet body 1 decreases, and the memory alloy telescopic structure 10 shrinks and deforms, causing the driving rod 91 to move downward and reset, and the two adjacent opening and closing frames 921 are reset close to each other. Under the action of the elastic member 63, the blocking plate 62 moves up and resets to offset the position between the air outlet 8 and the gas supply connector 7 to block the gas supply connector 7, and during the upward movement of the blocking plate 62, the movable frame 92 is switched inward and returned to its original position, driving each wind shield strip 5 to reset and then opening the ventilation duct 4, and the harmful gas in the cabinet body 1 is discharged in time by starting the two fans 20.

[0032] The electromagnetic shielding cabinet eliminates circuit dependence and utilizes the memory alloy telescopic structure 10 to drive the driving rod 91 to automatically block the ventilation duct 4 and release the carbon dioxide fire extinguisher. After the fire is extinguished and the temperature is reduced, ventilation is restored and harmful gases in the cabinet body 1 are discharged in time, thereby reducing the harm of fire to personnel and equipment and improving safety.

[0033] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. An automatic fire extinguishing electromagnetic shielding cabinet, characterized in that: include: A cabinet body (1), wherein an equipment mounting plate (2) is arranged inside the cabinet body (1), at least one side of the cabinet body (1) is opened, a cabinet door (3) is hingedly connected to the cabinet body (1), a ventilation duct (4) is arranged at the top and bottom of the cabinet body (1), and a plurality of windshield strips (5) distributed in an array are rotatably connected in the ventilation duct (4); A fire extinguishing assembly (6), the fire extinguishing assembly (6) comprising a carbon dioxide fire extinguisher (61), a blocking plate (62) and an elastic member (63); the carbon dioxide fire extinguisher (61) is arranged on the inner side wall of the cabinet door (3); the carbon dioxide fire extinguisher (61) is provided with a gas supply connector (7) connected to the interior thereof; the blocking plate (62) is slidably connected to the inner side wall of the cabinet door (3) and abuts against the gas supply connector (7); the blocking plate (62) is penetrated by a gas outlet (8) corresponding to the gas supply connector (7); the elastic member (63) is arranged between the blocking plate (62) and the cabinet door (3) so that the blocking plate (62) has a tendency to move upwards; the gas outlet (8) and the gas supply connector (7) are staggered in position to block the gas supply connector (7); An automatic linkage component (9), the automatic linkage component (9) comprising a driving rod (91) and two switching movable frames (92); the equipment mounting plate (2) is provided with a guide sleeve (201) for the driving rod (91) to pass through; a memory alloy telescopic structure (10) is provided between the driving rod (91) and the guide sleeve (201); the top end and the bottom end of the driving rod (91) are respectively linked with the two switching movable frames (92); the two switching movable frames (92) are respectively slidably connected to the top and the bottom of the cabinet body (1); at least one of the switching movable frames (92) is linked with the blocking plate (62); and the switching movable frame (92) is linked with each of the corresponding windshield strips (5).

2. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 1 is characterized in that: The number of the device mounting plates (2) is set to be several, and the device mounting plates (2) are arranged at intervals along the height direction of the cabinet body (1) to divide the interior of the cabinet body (1) into several mounting spaces (11), and the device mounting plates (2) are penetrated by several filter holes (202) to connect the mounting spaces (11).

3. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 2 is characterized in that: The number of the carbon dioxide fire extinguishers (61) of the fire extinguishing assembly (6) is set to be several, and each of the gas supply connectors (7) corresponds to each of the installation spaces (11).

4. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 2 is characterized in that: The top and bottom ends of the driving rod (91) are both driving ends (12), and a first driving surface (13) inclined downward is formed on the side of the switching movable frame (92) close to the driving rod (91), and the first driving surface (13) and the corresponding driving end (12) are in abutment with each other, so that when the driving rod (91) moves upward along its axial direction, the switching movable frame (92) is linked to move outward.

5. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 4 is characterized in that: A second driving surface (14) inclined downward is formed on the side of the switching movable frame (92) away from the driving rod (91), and the second driving surface (14) and the corresponding upper part of the blocking plate (62) are in contact with each other, so that when the switching movable frame (92) moves outward, the blocking plate (62) is linked to move downward.

6. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 5 is characterized in that: A driving strip (15) is provided on the side wall of the switching movable frame (92) away from the installation space (11), and a driving gear (16) is provided at the end of the windshield strip (5), and the driving strip (15) and the corresponding driving gears (16) are meshed with each other.

7. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 6 is characterized in that: The switching movable frame (92) comprises two opening and closing frames (921) which are spaced apart and arranged opposite to each other, the first driving surface (13) being formed on opposite sides of the two adjacent opening and closing frames (921), and the second driving surface (14) being formed on the side of the opening and closing frame (921) away from the driving end (12); the wind shielding strips (5) in the ventilation duct (4) are divided into two groups, the two groups of wind shielding strips (5) are arranged opposite to each other and are respectively arranged along the two adjacent opening and closing frames (921), and the switching movable frame (92) is provided with two driving strips (15), and the two driving strips (15) are respectively arranged on the two opening and closing frames (921).

8. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 7 is characterized in that: The top and bottom of the cabinet body (1) are each provided with two parallel and spaced support structures (17); the opening and closing frame (921) is slidably connected to the corresponding support structure (17); the opposite sides of two adjacent support structures (17) are each provided with a first magnetic block (18); the opening and closing frame (921) is provided with a second magnetic block (19); and the magnetic force between the first magnetic block (18) and the second magnetic block (19) is an attractive force.

9. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 1 is characterized in that: The ventilation duct (4) located at the top of the cabinet body (1) is an air outlet end, and the ventilation duct (4) located at the bottom of the cabinet body (1) is an air inlet end. Fans (20) are provided at both the air outlet end and the air inlet end.

10. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 1, characterized in that: The top of the cabinet body (1) is provided with a pressure relief interface (21) which is in communication with the interior thereof, and a safety valve (22) is provided in the pressure relief interface (21).

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