An automatic fire extinguishing electromagnetic shielding cabinet

Abstract

An automatic fire extinguishing electromagnetic shielding cabinet disclosed by the present invention includes: a cabinet body, an equipment mounting plate is arranged inside the cabinet body, and a plurality of wind blocking strips are rotatably connected in a ventilation duct; a fire extinguishing component, the fire extinguishing component includes a carbon dioxide fire extinguisher, a blocking plate and an elastic member; an automatic linkage component, the automatic linkage component includes a driving rod and two switching movable frames, a guide sleeve is arranged on the equipment mounting plate, a shape memory alloy telescopic structure is arranged between the driving rod and the guide sleeve, the driving rod is in linkage cooperation with the two switching movable frames, the switching movable frames are in linkage cooperation with the blocking plate, and the switching movable frames are in linkage cooperation with the respective wind blocking strips corresponding to them. The automatic fire extinguishing electromagnetic shielding cabinet of the present invention eliminates the dependence on circuits, realizes the automatic blocking of the ventilation duct and the release of the carbon dioxide fire extinguisher, restores ventilation and timely discharges harmful gases after fire extinguishing and cooling, reduces the harm of fire to personnel and equipment, and improves safety.

Description

Technical Field

[0001] The present invention relates to the technical field of shielded cabinets, and particularly to an automatic fire extinguishing electromagnetic shielding cabinet. Background Art

[0002] An electromagnetic shielding cabinet is an electromagnetic shielding device that can effectively suppress the leakage of computer electromagnetic information and prevent external strong electromagnetic interference from affecting the normal operation of the computer. When the electromagnetic shielding cabinet is working, it needs ventilation and heat dissipation. Usually, a smoke sensor is equipped inside the electromagnetic shielding cabinet. When a fire occurs inside the cabinet, once the detected smoke concentration is too high, the alarm system will be triggered to notify relevant personnel and start the fire extinguishing plan. Carbon dioxide fire extinguishers are a common choice for extinguishing electrical fires. Carbon dioxide can isolate oxygen, thereby suppressing combustion. Since 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 difficult to control the spread of the fire in time. When extinguishing the fire, it is also 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. Most automatic fire extinguishing systems rely on sensor triggering, but there is also a risk that the automatic fire extinguishing cannot be started due to circuit damage during a fire. Summary of the Invention

[0003] The purpose of the present invention is to design an automatic fire extinguishing electromagnetic shielding cabinet to solve the above-mentioned technical deficiencies. It eliminates the dependence on circuits, uses a shape memory alloy telescopic structure to drive a drive rod to automatically block the ventilation duct and release a carbon dioxide fire extinguisher, and resumes ventilation and timely discharges harmful gases after extinguishing the fire and cooling down, reducing the harm of the fire to personnel and equipment and improving safety.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: an automatic fire extinguishing electromagnetic shielding cabinet, comprising:

[0005] A cabinet body, an equipment mounting plate is arranged inside the cabinet body. At least one side of the cabinet body is open, a cabinet door is hinged to the cabinet body, ventilation ducts are communicated at the top and bottom of the cabinet body, and a plurality of wind blocking strips distributed in an array are rotatably connected inside the ventilation ducts;

[0006] A fire extinguishing assembly, the fire extinguishing assembly includes a carbon dioxide fire extinguisher, a blocking plate and an elastic member. The carbon dioxide fire extinguisher is arranged on the inner side wall of the cabinet door. The carbon dioxide fire extinguisher is provided with a gas transmission joint communicated with its interior. The blocking plate is slidably connected to the inner side wall of the cabinet door. The blocking plate is penetrated with an air outlet hole corresponding to the gas transmission joint. The elastic member is arranged between the blocking plate and the cabinet door, so that the blocking plate has a tendency to move upward, and the positions of the air outlet hole and the gas transmission joint are staggered;

[0007] An automatic linkage component, the automatic linkage component includes a driving rod and two switching movable frames. The equipment mounting plate is provided with a guiding sleeve for the driving rod to pass through. A shape memory alloy telescopic structure is arranged between the driving rod and the guiding sleeve. The top and bottom ends of the driving rod are respectively in linkage cooperation with the two switching movable frames. 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 in linkage cooperation with the blocking plate, and the switching movable frame is in linkage cooperation with each of the corresponding wind blocking strips.

[0008] Preferably, a plurality of equipment mounting plates are provided. The equipment mounting plates are arranged at intervals along the height direction of the cabinet body to divide the interior of the cabinet body into a plurality of installation spaces. A plurality of filtering holes are formed through the equipment mounting plates to communicate the installation spaces with each other.

[0009] Preferably, a plurality of carbon dioxide fire extinguishers of the fire extinguishing component are provided. Each gas transmission joint corresponds to each installation space respectively.

[0010] Preferably, both the top and bottom ends of the driving rod are driving ends. A first driving surface inclined downward is formed on the side of the switching movable frame close to the driving rod. The first driving surface is in contact and cooperation with the corresponding driving end, so that when the driving rod moves upward along its axis, the switching movable frame is driven to translate outward.

[0011] Preferably, a second driving surface inclined downward is formed on the side of the switching movable frame away from the driving rod. The second driving surface is in contact and cooperation with the upper part of the corresponding blocking plate, so that when the switching movable frame translates outward, the blocking plate is driven to move downward.

[0012] Preferably, a driving strip is arranged on the side wall of the switching movable frame away from the installation space. A driving gear is arranged at the end of the wind blocking strip. The driving strip is meshed with each of the corresponding driving gears.

[0013] Preferably, the switching movable frame includes two opening and closing frames arranged at intervals and opposite to each other. The first driving surfaces are formed on the opposite sides of the adjacent two opening and closing frames. The second driving surface is formed on the side of the opening and closing frame away from the driving end; each of the wind blocking strips in the ventilation duct is divided into two groups. The two groups of wind blocking strips are arranged opposite to each other and are respectively arranged along the adjacent two opening and closing frames. Two driving strips are arranged on the switching movable frame, and the two driving strips are respectively arranged on the two opening and closing frames.

[0014] Preferably, two parallel and spaced support structures are provided on the top and bottom of the cabinet body, the opening and closing frame is slidably connected to the corresponding support structure, a first magnetic block is provided on the opposite sides of the two adjacent support structures, and 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.

[0015] Preferably, the ventilation duct located at the top of the cabinet body is an air outlet end, and the ventilation duct located at the bottom of the cabinet body is an air inlet end, and fans are provided at both the air outlet end and the air inlet end.

[0016] Preferably, a pressure relief interface communicating with 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.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 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 move outward. When the switching movable frame moves outward, it also links the blocking plate 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 windshield strips to block the ventilation duct, preventing air convection from supporting combustion and the spread of toxic smoke, and ensuring that there is sufficient carbon dioxide gas inside the cabinet body, thereby improving the fire extinguishing efficiency.

[0019] 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 so that the position between the air outlet and the gas supply joint is offset to block the gas supply joint. In the process of moving up the blocking plate, the movable frame is switched inward and reset, driving each windshield strip to reset and then opening the ventilation duct, thereby timely discharging the harmful gas in the cabinet body.

[0020] 3. This electromagnetic shielding cabinet eliminates circuit dependence and uses a memory alloy telescopic structure to drive a drive rod to automatically block ventilation ducts and release carbon dioxide fire extinguishers. After the fire is extinguished and the temperature is lowered, 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

[0021] Figure 1 is a structural diagram of the electromagnetic shielding cabinet in the embodiment;

[0022] Figure 2 is a cross-sectional view of the bottom of the cabinet body in the embodiment;

[0023] Figure 3 It is a cross-sectional view of the top of the cabinet body in the embodiment.

[0024] In the figure: 1, cabinet body; 2, equipment mounting plate; 201, guide sleeve; 202, filter hole; 3, cabinet door; 4, ventilation duct; 5, wind blocking strip; 6, fire extinguishing assembly; 61, carbon dioxide fire extinguisher; 62, blocking plate; 63, elastic member; 7, gas transmission joint; 8, air outlet hole; 9, automatic linkage assembly; 91, driving rod; 92, switching movable frame; 921, opening and closing frame; 10, shape 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 bracket; 24, limiting ring; 25, blocking ring; 26, limiting plate; 27, positioning ring; 28, heat conduction structure. Specific embodiments

[0025] The present invention will be further described below through embodiments in conjunction with the drawings.

[0026] Refer to Figure 1 , Figure 2 , Figure 3 , an automatic fire extinguishing electromagnetic shielding cabinet, including a cabinet body 1, two fire extinguishing assemblies 6 and an automatic linkage assembly 9. Both the front and rear sides of the cabinet body 1 are provided with openings. 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. The equipment mounting plates 2 are spaced 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 spaces 11 are for installing computer equipment such as servers, switches, disk arrays, and power supplies. A plurality of filter holes 202 penetrate through the equipment mounting plates 2 to connect the installation spaces 11.

[0027] Ventilation ducts 4 are connected and communicated at the top and bottom of the cabinet body 1. The ventilation ducts 4 are square pipes. A plurality of wind blocking strips 5 distributed in an array are rotatably connected inside the ventilation ducts 4. The ventilation duct 4 at the top of the cabinet body 1 is the air outlet end, and the ventilation duct 4 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 inside the cabinet body 1 through the corresponding ventilation duct 4, so as to ensure the stable operation of each device inside the cabinet body 1.

[0028] The fire extinguishing assembly 6 is disposed on the inner sidewall of the cabinet door 3. The fire extinguishing assembly 6 includes three carbon dioxide fire extinguishers 61, a blocking plate 62, and three elastic members 63. The carbon dioxide fire extinguishers 61 are fixedly connected to the inner sidewall of the cabinet door 3, and the carbon dioxide fire extinguishers 61 are provided with gas transmission connectors 7 communicating with their interiors. Each gas transmission connector 7 corresponds to each installation space 11 respectively.

[0029] The inner sidewall of the cabinet door 3 is provided with a plurality of mounting brackets 23 arranged at intervals along its height direction. The mounting brackets 23 are penetrated with a limiting ring 24 for the up-and-down sliding of the blocking plate 62, so that the blocking plate 62 is slidably connected to the inner sidewall of the cabinet door 3 and abuts against the gas transmission connector 7. A blocking ring 25 is sleeved on the gas transmission connector 7. The blocking plate 62 is penetrated with an air outlet hole 8 corresponding to the gas transmission connector 7. The elastic member 63 is disposed between the blocking plate 62 and the mounting bracket 23 at the bottom of the cabinet door 3, so that the blocking plate 62 has a tendency to move upward. A limiting plate 26 is provided at the bottom of the blocking plate 62. The limiting plate 26 abuts against the mounting bracket 23 at the bottom of the cabinet body 1 to limit the upward movement of the blocking plate 62. The positions of the air outlet hole 8 and the gas transmission connector 7 are staggered to block the gas transmission connector 7.

[0030] 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 guiding sleeve 201 for the driving rod 91 to pass through. Each guiding sleeve 201 is coaxially arranged. A shape memory alloy telescopic structure 10 is disposed between the driving rod 91 and the guiding sleeve 201. The shape memory alloy telescopic structure 10 is a spring structure made of shape memory alloy. The shape memory alloy telescopic structure 10 is sleeved on the driving rod 91. When the temperature rises to its phase change temperature, the shape memory alloy telescopic structure 10 elongates to drive the driving rod 91 to extend upward. When its temperature drops to its phase change temperature, the shape memory alloy telescopic structure 10 contracts and resets, which is the prior art and will not be elaborated in detail here. Preferably, a heat conduction structure 28 is coaxially arranged on the top surface of the guiding sleeve 201. The heat conduction structure 28 is a tube body made of ceramic or metal material. The driving rod 91 is movably sleeved with the heat conduction structure 28, and the driving rod 91 moves up and down and translates along the axial direction of the heat conduction structure 28.

[0031] The switching movable frame 92 includes two opening and closing frames 921 arranged at intervals and oppositely. Both the top and the bottom of the cabinet body 1 are 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 the bottom of the cabinet body 1. First magnetic blocks 18 are arranged on the opposite sides of adjacent two supporting structures 17. The opening and closing frames 921 are provided with second magnetic blocks 19. The magnetic force between the first magnetic blocks 18 and the second magnetic blocks 19 is an attractive force, so that the two opening and closing frames 921 have a tendency to approach each other to realize the automatic reset of the switching movable frame 92.

[0032] 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 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 friction 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 friction 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.

[0033] The windshield strips 5 within the ventilation duct 4 are divided into two groups. The two groups of windshield strips 5 are arranged opposite each other and along two adjacent opening and closing frames 921. Two drive strips 15 are provided on the side wall of the switching movable frame 92 away from the installation space 11. The two drive strips 15 are respectively provided on the two opening and closing frames 921. The ends of the windshield strips 5 are provided with drive gears 16. The drive strips 15 and their corresponding drive gears 16 engage with each other to achieve linkage and coordination between the switching movable frame 92 and its corresponding windshield strips 5. The drive strips 15 drive the corresponding windshield strips 5 to rotate synchronously through a gear rack transmission. The opening and closing frames 921 translate outward to link the windshield strips 5 together to block the corresponding ventilation duct 4. The opening and closing frames 921 retract inward to link the windshield strips 5 apart to open the corresponding ventilation duct 4.

[0034] 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 move 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 moves 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 moves downward. The top of the driving rod 91 is fixedly connected to 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 windshield strips 5 to block the ventilation duct 4, preventing air convection from supporting combustion and the spread of toxic smoke, and ensuring that there is sufficient carbon dioxide gas inside the cabinet body 1 to improve the fire extinguishing efficiency.

[0035] Preferably, the gas delivery joint 7 can be designed as a heat-sensitive glass bulb. When the air outlet 8 is in communication with the gas delivery joint 7, the flame or hot air current contacts the gas delivery joint 7, causing the heat-sensitive glass bulb to break, thus enabling the rapid opening of the carbon dioxide fire extinguisher 61 for carbon dioxide fire extinguishing.

[0036] Preferably, a pressure relief interface 21 communicating with the interior thereof is provided at the top of the cabinet body 1. A safety valve 22 is provided in the pressure relief interface 21. The pressure relief interface 21 is in communication with an externally connected recovery pipe. The safety valve 22 is a prior art and will not be elaborated herein in detail. When both ventilation ducts 4 are closed, the safety valve 22 can monitor and control the air pressure inside the cabinet body 1. When the air pressure is too high, the safety valve 22 opens, and the gas inside the cabinet body 1 is discharged separately through the pressure relief interface 21 for the collection and treatment of harmful gases, avoiding excessive air pressure inside the cabinet body 1 and effectively preventing the diffusion of harmful gases to the external environment, ensuring personal safety and reducing the pollution of the surrounding environment caused by the fire.

[0037] After the temperature inside the cabinet body 1 decreases after the fire is extinguished, the shape memory alloy telescopic structure 10 contracts and deforms, causing the driving rod 91 to move downward and reset. The two adjacent opening and closing frames 921 approach and reset each other. Under the action of the elastic member 63, the sealing plate 62 moves upward and resets to misalign the position between the air outlet 8 and the gas delivery joint 7 to block the gas delivery joint 7. During the upward movement of the sealing plate 62, the linkage switching movable frame 92 moves inward and resets, driving each wind blocking strip 5 to reset and open the ventilation duct 4, and the harmful gases inside the cabinet body 1 are discharged in a timely manner by starting the two fans 20.

[0038] This electromagnetic shielding cabinet eliminates the circuit dependence, uses the shape 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, and resumes ventilation and discharges the harmful gases inside the cabinet body 1 in a timely manner after the fire is extinguished and the temperature drops, reducing the harm of the fire to personnel and equipment and improving the safety.

[0039] Certainly, the above are only typical examples of the present invention. In addition, the present invention can also have many other specific implementation manners. Any 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, Including: A cabinet body (1), an equipment mounting plate (2) is arranged inside the cabinet body (1), at least one side of the cabinet body (1) is open, a cabinet door (3) is hinged to the cabinet body (1), ventilation ducts (4) are communicated with both the top and the bottom of the cabinet body (1), and a plurality of wind blocking strips (5) distributed in an array are rotatably connected in the ventilation ducts (4); A fire extinguishing assembly (6), the fire extinguishing assembly (6) includes a carbon dioxide fire extinguisher (61), a plugging 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 transmission joint (7) communicated with its interior, the plugging plate (62) is slidably connected to the inner side wall of the cabinet door (3) and abuts against the gas transmission joint (7), the plugging plate (62) is penetrated with an air outlet hole (8) corresponding to the gas transmission joint (7), the elastic member (63) is arranged between the plugging plate (62) and the cabinet door (3), so that the plugging plate (62) has a tendency to move upward, and the positions of the air outlet hole (8) and the gas transmission joint (7) are staggered to block the gas transmission joint (7); An automatic linkage assembly (9), 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, a shape memory alloy telescopic structure (10) is arranged between the driving rod (91) and the guide sleeve (201), the top and the bottom of the driving rod (91) are respectively linked and matched with the two switching movable frames (92), and 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 and matched with the plugging plate (62), the top and the bottom of the driving rod (91) are both driving ends (12), a downwardly inclined first driving surface (13) is formed on the side of the switching movable frame (92) close to the driving rod (91), and the first driving surface (13) is in abutting cooperation with the corresponding driving end (12), so that when the driving rod (91) moves upward along its axis, the switching movable frame (92) is driven to translate outward; a downwardly inclined second driving surface (14) is formed on the side of the switching movable frame (92) away from the driving rod (91), and the second driving surface (14) is in abutting cooperation with the upper part of the corresponding plugging plate (62), so that when the switching movable frame (92) translates outward, the plugging plate (62) is driven to move downward; The switching active frame (92) is in linkage cooperation with each corresponding wind shield strip (5). The number of the equipment mounting plates (2) is set to be several. The equipment 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 installation spaces (11). The equipment mounting plates (2) are provided with several filtering holes (202) to communicate the installation spaces (11) with each other. A driving strip (15) is arranged on the side wall of the switching active frame (92) away from the installation space (11). A driving gear (16) is arranged at the end of the wind shield strip (5). The driving strip (15) meshes with each corresponding driving gear (16). The switching active frame (92) includes two opening and closing frames (921) arranged at intervals and oppositely. The first driving surfaces (13) are formed on the opposite sides of the adjacent two opening and closing frames (921). The second driving surfaces (14) are formed on the side parts of the opening and closing frames (921) away from the driving end (12). The wind shield strips (5) in the ventilation duct (4) are divided into two groups. The two groups of wind shield strips (5) are arranged oppositely and respectively along the adjacent two opening and closing frames (921). The switching active 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). Two parallel and spaced supporting structures (17) are arranged at the top and bottom of the cabinet body (1). The opening and closing frame (921) is slidably connected to the corresponding supporting structure (17). The first magnetic blocks (18) are arranged on the opposite sides of the adjacent two supporting structures (17). The opening and closing frame (921) is provided with a second magnetic block (19). The magnetic force between the first magnetic block (18) and the second magnetic block (19) is an attractive force. The gas transmission joint (7) is a heat-sensitive glass bulb. A heat conduction structure (28) is coaxially arranged on the top surface of the guide sleeve (201). The heat conduction structure (28) is a tube body made of ceramic or metal material. The driving rod (91) is movably sleeved with the heat conduction structure (28). The ventilation duct (4) at the top of the cabinet body (1) is the air outlet end, and the ventilation duct (4) at the bottom of the cabinet body (1) is the air inlet end. Fans (20) are arranged 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) outwards through the corresponding ventilation duct (4). The fans (20) in the ventilation duct (4) and the wind shield strips (5) are arranged at intervals.

2. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 1, wherein The number of the carbon dioxide fire extinguishers (61) of the fire extinguishing assembly (6) is set to be several. Each gas transmission joint (7) corresponds to each installation space (11).

3. The automatic fire extinguishing electromagnetic shielding cabinet according to claim 1, characterized in that, A pressure relief interface (21) communicating with the inside is provided at the top of the cabinet body (1), and a safety valve (22) is provided in the pressure relief interface (21).

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