Small space passive precision fire extinguishing device

Abstract

The application belongs to the technical field of fire extinguishing device, especially to a small-space passive precise fire extinguishing device, which comprises a mounting seat, a wind box, a fire extinguishing box and a flow guide cover, the bottom end of the mounting seat is fixedly connected with the wind box, the bottom end of the wind box is fixedly connected with the fire extinguishing box, the front end of the fire extinguishing box is provided with a pull-out opening, the inside of the pull-out opening is slidably connected with a pull-out box, the inside of the pull-out box is provided with a seat cylinder, the bottom end of the seat cylinder is provided with a through opening one, the inside of the seat cylinder is clampedly connected with a hot gas aerosol fire extinguisher, and the bottom end of the hot gas aerosol fire extinguisher is fixedly connected with a nozzle, when the hot gas aerosol fire extinguisher releases hot gas aerosol agent by the nozzle, the export direction of the hot gas aerosol agent can be continuously changed by the rotation of the T-shaped flow guide nozzle and the synchronous swing of the flow guide vane, so that the hot gas aerosol agent can be not only vertically exported but also obliquely exported to the surroundings, the diffusion is uniform, the effect is good, the hot gas aerosol agent in the small space can be quickly and fully covered, and the use is better.

Description

Technical Field

[0001] This invention belongs to the field of fire extinguishing device technology, specifically relating to a passive precision fire extinguishing device for small spaces. Background Technology

[0002] Traditional fire extinguishers are generally pressurized fire extinguishers, which mostly require manual pressing to operate. Thermal aerosol fire extinguishing is a fire extinguishing technology that has been developed in recent years. Its principle is as follows: when the thermal tube (thermal element) of the thermal aerosol fire extinguishing device detects that the current ambient temperature exceeds the set temperature value, the thermal tube can automatically trigger the fire extinguisher to work. The fire extinguisher can then spray thermal aerosol agent outward from the nozzle. The released thermal aerosol agent will diffuse into the protected area, thereby achieving the purpose of suppressing and extinguishing the fire source. This device does not require manual intervention and can achieve automatic fire extinguishing. It does not require an external power supply to start, and the thermal element responds accurately. At the same time, the extinguishing smoke is non-toxic, harmless, non-corrosive, and non-polluting, and can preserve valuable items such as cultural relics, archives, electronic equipment, and instruments intact. It can be widely used in unmanned, relatively enclosed, and small spaces such as power distribution rooms, generator rooms, cable interlayers, cable wells, and cable trenches.

[0003] Existing thermal aerosol fire extinguishing devices for small spaces have the following shortcomings during use: After fixed installation, the nozzles of these devices have a fixed orientation and cannot be automatically adjusted, which means that the thermal aerosol can only be sprayed and released in a fixed direction. When the thermal aerosol is sprayed from the nozzle, the spray area is relatively narrow, and the thermal aerosol diffuses unevenly in all directions, with the concentration at the edges being lower than that in the center. This affects the rapid and comprehensive fire extinguishing effect of the thermal aerosol in small spaces, resulting in poor performance.

[0004] Therefore, this invention makes further innovative designs based on existing thermal aerosol fire extinguishing devices. Summary of the Invention

[0005] To address the aforementioned problems in existing technologies, this invention provides a passive precision fire extinguishing device for small spaces. When the thermal aerosol fire extinguisher releases thermal aerosol agent through the nozzle, the direction of the thermal aerosol agent's discharge can be continuously changed by the rotation of the T-shaped guide nozzle and the synchronous oscillation of the guide vane. This allows the thermal aerosol agent to be discharged not only vertically but also tilted outwards, resulting in uniform diffusion and better performance. This facilitates rapid and complete coverage of the thermal aerosol agent in small spaces, making it an optimal device for use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a small space passive precision fire extinguishing device, comprising a mounting base, an air box, a fire extinguishing box and a flow guide, wherein the bottom end of the mounting base is fixedly connected to the air box;

[0007] A fire extinguishing box is fixedly connected to the bottom of the bellows. A pull-out opening is provided at the front end of the fire extinguishing box. A pull-out box is slidably connected inside the pull-out opening. A seat is provided inside the pull-out box. A through-hole is provided at the bottom end of the seat. A thermal aerosol fire extinguisher is engaged inside the seat. A nozzle is fixedly connected to the bottom end of the thermal aerosol fire extinguisher. A heat-sensitive tube is fixedly connected to the bottom front end of the thermal aerosol fire extinguisher. A dual-head motor is fixedly installed on the right side of the fire extinguishing box. A gear is fixedly connected to the upper output end of the dual-head motor. A gear is fixedly connected to the lower output end of the dual-head motor. A smoke detector is fixedly installed at the bottom right side of the fire extinguishing box.

[0008] The bottom of the fire extinguishing box is fixedly connected to a flow guide cover. The bottom of the flow guide cover has a second opening. A T-shaped flow guide nozzle is rotatably connected inside the second opening. A gear ring is fixedly connected around the bottom of the T-shaped flow guide nozzle, and a gear three meshes with the gear ring. Several flow guide vanes are provided inside the T-shaped flow guide nozzle. A shaft is fixedly connected to both ends of each flow guide vane. Several through holes are provided on both sides of the bottom of the T-shaped flow guide nozzle, and the shaft is rotatably connected to the through holes. A shell frame is fixedly connected to the upper end of the T-shaped flow guide nozzle. A slot is provided at the bottom of the shell frame. A trapezoidal lever is movably connected inside the shell frame. A spring is fixedly connected between the rear end of the trapezoidal lever and the shell frame. Several lever pieces are fixedly connected to the bottom end of the trapezoidal lever. A trapezoidal protrusion is fixedly connected to the front end of the flow guide cover.

[0009] As a preferred technical solution of the small-space passive precision fire extinguishing device of the present invention, the air box is provided with ventilation openings on all four sides, the air box is provided with a support, and a support rod is fixedly connected to all four sides of the support. The end of the support rod away from the support is fixedly connected to the air box. A bearing is fixedly connected to the inside of the support, and a shaft is fixedly connected to the inside of the bearing. Several fan blades are fixedly connected to the bottom of the shaft. A gear is fixedly connected to the upper end of the shaft, and a gear meshes with the gear.

[0010] As a preferred technical solution of the small-space passive precision fire extinguishing device of the present invention, a magnetic suction plate is fixedly connected to the upper end of the mounting base, the upper end of the magnetic suction plate is coated with an adhesive layer, and several fixing holes are opened around the mounting base.

[0011] As a preferred technical solution of the small-space passive precision fire extinguishing device of the present invention, the base is fixedly connected with support rods two around its perimeter, and the end of the support rods two away from the base is fixedly connected to the pull-out box.

[0012] As a preferred technical solution of the small-space passive precision fire extinguishing device of the present invention, a through hole is provided at the bottom front end of the pull-out box, and the heat-sensitive tube is connected to the through hole.

[0013] As a preferred technical solution of the small-space passive precision fire extinguishing device of the present invention, the front end of the pull-out box is fixedly connected with a buckle.

[0014] As a preferred technical solution of the small-space passive precision fire extinguishing device of the present invention, the pull-out box is fixedly connected to the two rear sides of the pull-out box, and the fire extinguishing box is provided with the two rear sides of the pull-out box.

[0015] As a preferred technical solution of the small-space passive precision fire extinguishing device of the present invention, the guide vanes and the paddles are equidistantly distributed, and the spacing between the guide vanes is equal to the spacing between the paddles.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In the use of this invention, when a fire occurs in a small space, the smoke detector can detect smoke particles in the current environment, automatically triggering an alarm and activating a dual-head motor to drive gears two and three to rotate. The rotating gear three drives the T-shaped guide nozzle with a toothed ring on the guide shroud to rotate. Simultaneously, during the rotation of the T-shaped guide nozzle, the trapezoidal lever with several paddles on the T-shaped guide nozzle cooperates with the trapezoidal protrusions on the guide shroud to achieve synchronous oscillation of several guide vanes inside the T-shaped guide nozzle. Through the above technical solution, when the thermal aerosol fire extinguisher releases thermal aerosol agent from the nozzle, the rotation of the T-shaped guide nozzle and the synchronous oscillation of the guide vanes continuously change the direction of thermal aerosol agent discharge, allowing the thermal aerosol agent to be discharged not only vertically but also tilted in all directions, resulting in uniform diffusion and better effect. This facilitates rapid and complete coverage of the thermal aerosol agent in small spaces, making it an optimal choice for use.

[0018] During the use of this invention, when the thermal aerosol fire extinguisher and the dual-head motor are working, the rotating gear two can also drive the gear one, shaft and fan blades in the air box to rotate. The rotating fan blades can accelerate the export of thermal aerosol agent in the guide shroud and prevent the thermal aerosol agent from accumulating in the guide shroud, which can further improve the diffusion speed and diffusion effect, making it better to use.

[0019] In use, the present invention can also be fixed by magnetic attraction and adhesion through the magnetic absorbing sheet with adhesive layer on the mounting base, which can realize the installation of the device without drilling. The installation is simple and convenient, the fixation is stable and firm, and the use is better.

[0020] In use, the invention also allows for convenient installation, removal, and replacement of the thermal aerosol fire extinguisher via a pull-out box with a base inside the fire extinguisher box, resulting in better performance. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a bottom-view structural diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the rear view structure of the present invention;

[0025] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0026] Figure 5 This is a schematic diagram of the bellows connection structure of the present invention;

[0027] Figure 6 This is a bottom view of the bellows connection structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the fire extinguisher box connection structure of the present invention;

[0029] Figure 8 This is a bottom view of the fire extinguisher box connection structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the fire extinguisher box connection structure of the present invention;

[0031] Figure 10 This is a schematic diagram of the pull-out box structure of the present invention;

[0032] Figure 11 This is a schematic diagram of the flow guide shield connection structure of the present invention;

[0033] Figure 12 This is a bottom view of the fairing connection structure of the present invention;

[0034] Figure 13 This is a schematic diagram of the rear view of the deflector connection structure of the present invention;

[0035] Figure 14 This is a schematic diagram of the T-shaped guide nozzle connection structure of the present invention;

[0036] Figure 15 This is a schematic diagram of the trapezoidal lever connection structure of the present invention;

[0037] Figure 16 This is a schematic diagram of the cross-sectional structure of the trapezoidal lever connection of the present invention.

[0038] In the diagram: 1. Mounting base; 2. Magnetic plate; 3. Adhesive layer; 4. Fixing hole; 5. Air box; 6. Ventilation opening; 7. Support; 8. Support rod one; 9. Bearing; 10. Shaft; 11. Fan blade; 12. Gear one; 13. Fire extinguisher box; 14. Pull-out opening; 15. Pull-out box; 16. Seat; 17. Support rod two; 18. Through-hole one; 19. Thermal aerosol fire extinguisher; 20. Nozzle; 21. Heat-sensitive tube; 22. 1. Hole 1; 23. Buckle; 24. Snap pin; 25. Snap hole; 26. Double-headed motor; 27. Gear 2; 28. Gear 3; 29. ​​Smoke detector; 30. Flow guide; 31. Through port 2; 32. T-shaped flow guide nozzle; 33. Gear ring; 34. Flow guide vane; 35. Shaft; 36. Through hole 2; 37. Housing frame; 38. Trapezoidal lever; 39. Spring; 40. Slot; 41. Paddle; 42. Trapezoidal protrusion. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0040] Please see Figure 1-16 The present invention provides the following technical solution: a small space passive precision fire extinguishing device, including a mounting base 1, an air box 5, a fire extinguishing box 13 and a flow guide 30.

[0041] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a magnetic absorbing piece 2 is fixedly connected to the upper end of the mounting base 1. The upper end of the magnetic absorbing piece 2 is coated with an adhesive layer 3. Several fixing holes 4 are opened around the mounting base 1. The device can be installed without drilling by magnetic attraction of the magnetic absorbing piece 2 on the mounting base 1 and further bonding and fixing by the adhesive layer 3. It can also be installed by bolt fixing through the fixing holes 4, which is a flexible installation method.

[0042] In this embodiment, when the present invention is used, it can be fixed by magnetic attraction and adhesion through the magnetic suction piece 2 with adhesive layer 3 on the mounting base 1, which can realize the installation of the device without drilling, making the installation simple and convenient, the fixation stable and firm, and the use better.

[0043] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, furthermore, a bellows 5 is fixedly connected to the bottom of the mounting base 1. Ventilation openings 6 are provided around the bellows 5. A support 7 is installed inside the bellows 5. Support rods 8 are fixedly connected around the support 7, with the end of support rod 8 away from the support 7 fixedly connected to the bellows 5. A bearing 9 is fixedly connected inside the support 7, and a shaft 10 is fixedly connected inside the bearing 9. Several fan blades 11 are fixedly connected around the bottom of the shaft 10. A gear 12 is fixedly connected to the upper end of the shaft 10, and gear 27 is connected to gear 1. The 12-part meshing connection includes a vent 6 for air intake in the air box 5 to enable the fan blades 11 to rotate and exhaust air, a bearing 9 for rotational support of the shaft 10 to enable the fan blades 11 to rotate, a bearing 9 outer ring fixedly connected to the inner wall of the support 7, a bearing 9 inner ring fixedly connected to the outer wall of the shaft 10, and a number of balls between the bearing 9 outer ring and the bearing 9 inner ring (not specifically shown in the figure). The specific use of the above structure has been specifically explained in the usage process and working principle section of this embodiment, and will not be repeated here.

[0044] In this embodiment, during the use of the present invention, when the thermal aerosol fire extinguisher 19 and the dual-head motor 26 are working, the rotating gear 27 can drive the gear 12, shaft 10 and fan blade 11 in the air box 5 to rotate. The rotating fan blade 11 can accelerate the export of thermal aerosol agent in the guide shroud 30 and prevent the thermal aerosol agent from accumulating in the guide shroud 30, which can further improve the diffusion speed and diffusion effect, making it better to use.

[0045] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, furthermore, a fire extinguishing box 13 is fixedly connected to the bottom of the bellows 5. A pull-out port 14 is provided at the front end of the fire extinguishing box 13. A pull-out box 15 is slidably connected inside the pull-out port 14. A seat 16 is provided inside the pull-out box 15. Support rods 17 are fixedly connected to all four sides of the seat 16, and the end of the support rods 17 away from the seat 16 is fixedly connected to the pull-out box 15. A through-hole 18 is provided at the bottom of the seat 16. A thermal aerosol fire extinguisher 19 is engaged inside the seat 16. A nozzle 20 is fixedly connected to the bottom of the thermal aerosol fire extinguisher 19. A heat-sensitive tube 21 is fixedly connected to the front bottom of the thermal aerosol fire extinguisher 19. A through-hole 22 is provided at the bottom front end of the pull-out box 15, and the heat-sensitive tube 21 passes through and is connected to the through-hole 22. A handle 23 is fixedly connected to the front end of the pull-out box 15. Locking pins 24 are fixedly connected to both sides of the rear end of the pull-out box 15. Both sides of the rear end of the fire box 13 are provided with locking holes 25. A double-headed motor 26 is fixedly installed on the right side of the fire box 13. The upper output end of the double-headed motor 26 is fixedly connected to a gear 27, and the lower output end of the double-headed motor 26 is fixedly connected to a gear 3 28. A smoke detector 29 is fixedly installed at the bottom right side of the fire box 13, and the smoke detector 29 is electrically connected to the double-headed motor 26. The through hole 22 is used for the lead-out of the thermal tube 21. The handle 23 facilitates the pulling out of the pull box 15. After the pull box 15 containing the thermal aerosol fire extinguisher 19 is pushed into the fire box 13 through the pull-out port 14, the pull box 15 is locked by the locking shaft 24 and the locking hole 25 to prevent the pull box 15 from moving out on its own. The specific use of the above structure has been explained in detail in the usage process and working principle section of this embodiment, and will not be repeated here.

[0046] In this embodiment, when a fire occurs in a small space, the smoke detector 29 can detect the smoke particles in the current environment, automatically trigger the dual-head motor 26 to drive the gears 27 and 28 to rotate. In addition, when using this invention, the thermal aerosol fire extinguisher 19 can be easily installed, removed, and replaced through the pull-out box 15 with the seat 16 inside the fire extinguisher box 13, making it even better to use.

[0047] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16As shown, further, a flow guide 30 is fixedly connected to the bottom of the fire extinguishing box 13. A second opening 31 is provided at the bottom of the flow guide 30. A T-shaped flow guide nozzle 32 is rotatably connected inside the second opening 31. A gear ring 33 is fixedly connected around the bottom periphery of the T-shaped flow guide nozzle 32, and a gear 28 meshes with the gear ring 33. Several flow guide vanes 34 are provided inside the T-shaped flow guide nozzle 32. A shaft 35 is fixedly connected to both ends of each flow guide vane 34. Several through holes 36 are provided on both sides of the bottom of the T-shaped flow guide nozzle 32, and the shaft 35 is rotatably connected to the through holes 36. A housing 37 is fixedly connected to the upper end of the T-shaped flow guide nozzle 32. A slot 40 is provided at the bottom of the housing 37. A trapezoidal lever 38 is movably connected inside the housing 37. A spring 39 is fixedly connected between the rear end of the trapezoidal lever 38 and the housing 37. The bottom end of the trapezoidal lever 38 is fixed... A plurality of paddles 41 are connected, and the guide vanes 34 and paddles 41 are equidistantly distributed, with the spacing between the guide vanes 34 and the spacing between the paddles 41 being equal. A trapezoidal protrusion 42 is fixedly connected to the front end of the inner side of the guide cover 30. The guide vanes 34 can swing flexibly by rotating the shaft 35 relative to the through hole 36. The housing 37 is used for guiding and supporting the trapezoidal lever 38 and can achieve elastic extension and retraction by the spring 39. The bottom of the trapezoidal lever 38 is provided with a plurality of paddles 41 for moving the guide vanes 34, so as to achieve synchronous movement of the guide vanes 34. The trapezoidal protrusion 42 can make the trapezoidal lever 38 intermittently elastically extend and retract, so as to achieve intermittent movement control of the guide vanes 34 by the paddles 41. The specific use of the above structure has been specifically explained in the usage process and working principle section of this embodiment, and will not be repeated here.

[0048] In this embodiment, during the use of the invention, the rotating gear 328 drives the T-shaped guide nozzle 32 with toothed ring 33 on the guide cover 30 to rotate. At the same time, during the rotation of the T-shaped guide nozzle 32, the trapezoidal lever 38 with several paddles 41 on the T-shaped guide nozzle 32 can cooperate with the trapezoidal protrusion 42 on the guide cover 30 to realize the synchronous swing of several guide vanes 34 inside the T-shaped guide nozzle 32. Through the above technical solution, when the thermal aerosol fire extinguisher 19 releases thermal aerosol agent from the nozzle 20, the direction of thermal aerosol agent discharge can be continuously changed by the rotation of the T-shaped guide nozzle 32 and the synchronous swing of the guide vanes 34. This allows the thermal aerosol agent to be discharged not only vertically but also tilted in all directions, resulting in uniform diffusion and better effect. This facilitates rapid and complete coverage of thermal aerosol agent in small spaces, making it a better choice.

[0049] The usage process and working principle of this invention: During installation, the device can be installed without drilling by magnetic attraction of magnetic plate 2 on mounting base 1 and further bonding and fixing by adhesive layer 3. For example, when installing on the top of the distribution box, it can also be fixed by bolts through fixing hole 4. Then, the dual-head motor 26 and smoke detector 29 are connected to the external power supply.

[0050] During use, when a fire occurs in a small space, the smoke detector 29 can detect smoke particles in the current environment, automatically triggering an alarm and activating the dual-head motor 26 to drive gears 27 and 28 to rotate. The rotating gear 28 drives the T-shaped deflector 32 with a toothed ring 33 on the deflector 30 to rotate. Simultaneously, during the rotation of the T-shaped deflector 32, when the front end of the trapezoidal lever 38 on the T-shaped deflector 32 is rotated to contact the trapezoidal protrusion 42 inside the deflector 30, the front end of the trapezoidal lever 38 can temporarily retract into the housing 37. In the middle, the trapezoidal lever 38 compresses the spring 39 backward. During the backward movement of the trapezoidal lever 38, several paddles 41 at the bottom of the trapezoidal lever 38 can pull several guide vanes 34 backward, causing the guide vanes 34 to tilt and swing. The guide vanes 34 rotate relative to the through hole 36 through the shaft 35. When the trapezoidal lever 38 passes the trapezoidal protrusion 42, under the elastic force of the spring 39, the trapezoidal lever 38, paddles 41, and guide vanes 34 return to their original positions. When the trapezoidal lever 38 contacts the trapezoidal protrusion 42 again in the next rotation cycle, the above operation is repeated to achieve... During the rotation of the T-shaped guide nozzle 32, several internal guide vanes 34 oscillate synchronously. Simultaneously, in the event of a fire in a small space, when the thermal aerosol fire extinguisher 19 detects that the ambient temperature exceeds a set value, the thermal tube 21 automatically triggers the extinguisher to operate. The thermal aerosol fire extinguisher 19 then sprays thermal aerosol agent from the nozzle 20. As the thermal aerosol fire extinguisher 19 releases thermal aerosol agent from the nozzle 20, the direction of thermal aerosol agent output is continuously altered by the rotation of the T-shaped guide nozzle 32 and the synchronous oscillation of the guide vanes 34. The direction allows the thermal aerosol agent to be discharged not only vertically but also tilted in all directions, resulting in uniform diffusion and better effect. At the same time, when the thermal aerosol fire extinguisher 19 and the dual-head motor 26 are working, the rotating gear 27 can also drive the gear 12, shaft 10 and fan blade 11 in the air box 5 to rotate. The rotating fan blade 11 can accelerate the discharge of thermal aerosol agent in the guide shroud 30 and prevent the thermal aerosol agent from accumulating in the guide shroud 30, which can further improve the diffusion speed and diffusion effect, so as to achieve rapid and complete coverage of thermal aerosol agent in small spaces.

[0051] Furthermore, any content not described in detail in this embodiment falls within the scope of existing technology and common knowledge.

[0052] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A passive precision fire extinguishing device for small spaces, characterized in that: It includes a mounting base (1), a bellows (5), a fire extinguishing box (13) and a deflector (30), with the bellows (5) fixedly connected to the bottom end of the mounting base (1); A fire extinguishing box (13) is fixedly connected to the bottom of the bellows (5). A pull-out opening (14) is provided at the front end of the fire extinguishing box (13). A pull-out box (15) is slidably connected inside the pull-out opening (14). A seat (16) is provided inside the pull-out box (15). An opening (18) is provided at the bottom end of the seat (16). A thermal aerosol fire extinguisher (19) is engaged inside the seat (16). A nozzle (20) is fixedly connected to the bottom end of the fire extinguisher (19), a heat-sensitive tube (21) is fixedly connected to the bottom front end of the fire extinguisher (13), a double-headed motor (26) is fixedly installed on the right side of the fire extinguishing box (13), a gear two (27) is fixedly connected to the upper output end of the double-headed motor (26), a gear three (28) is fixedly connected to the lower output end of the double-headed motor (26), and a smoke detector (29) is fixedly installed at the bottom right side of the fire extinguishing box (13). The bottom of the fire extinguishing box (13) is fixedly connected to a flow guide (30). The bottom of the flow guide (30) is provided with a second opening (31). A T-shaped flow guide (32) is rotatably connected inside the second opening (31). A toothed ring (33) is fixedly connected around the bottom of the T-shaped flow guide (32). The gear three (28) meshes with the toothed ring (33). Several flow guide plates (34) are provided inside the T-shaped flow guide (32). A shaft (35) is fixedly connected to both ends of the flow guide plate (34). The bottom of the T-shaped flow guide (32) is located on both sides. Each of the above has several through holes (36), and the shaft (35) is rotatably connected to the through holes (36). The upper end of the T-shaped guide nozzle (32) is fixedly connected to a housing (37), and the bottom end of the housing (37) is provided with a slot (40). The interior of the housing (37) is movably connected to a trapezoidal lever (38), and the rear end of the trapezoidal lever (38) is fixedly connected to the housing (37) with a spring (39). The bottom end of the trapezoidal lever (38) is fixedly connected to several paddles (41), and the front end of the inside of the guide cover (30) is fixedly connected to a trapezoidal protrusion (42). Ventilation openings (6) are provided around the bellows (5). A support (7) is provided inside the bellows (5). A support rod (8) is fixedly connected around the support (7). The end of the support rod (8) away from the support (7) is fixedly connected to the bellows (5). A bearing (9) is fixedly connected inside the support (7). A shaft (10) is fixedly connected inside the bearing (9). Several fan blades (11) are fixedly connected around the bottom of the shaft (10). A gear (12) is fixedly connected to the upper end of the shaft (10). A gear (27) meshes with the gear (12).

2. The small-space passive precision fire extinguishing device according to claim 1, characterized in that: The upper end of the mounting base (1) is fixedly connected to a magnetic absorbing piece (2), the upper end of the magnetic absorbing piece (2) is coated with an adhesive layer (3), and several fixing holes (4) are opened around the mounting base (1).

3. The small-space passive precision fire extinguishing device according to claim 1, characterized in that: The seat (16) is fixedly connected to support rods (17) around its perimeter, and the end of the support rods (17) away from the seat (16) is fixedly connected to the pull-out box (15).

4. The small-space passive precision fire extinguishing device according to claim 1, characterized in that: The pull-out box (15) has a through hole (22) at the bottom front end, and the thermal tube (21) is connected to the through hole (22).

5. The small-space passive precision fire extinguishing device according to claim 1, characterized in that: The front end of the pull-out box (15) is fixedly connected with a buckle (23).

6. The small-space passive precision fire extinguishing device according to claim 1, characterized in that: The pull-out box (15) has a locking shaft (24) fixedly connected to both sides of its rear end, and the fire extinguishing box (13) has a locking hole (25) on both sides of its rear end.

7. The small-space passive precision fire extinguishing device according to claim 1, characterized in that: The guide vanes (34) and the paddles (41) are equidistantly distributed, and the spacing between the guide vanes (34) and the spacing between the paddles (41) are equal.

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