Fireproof structure in cabinet

Abstract

The utility model relates to the technical field of cabinets, in particular to an in-cabinet fireproof structure which comprises an installation cabinet, a fireproof cotton frame, a fire extinguishing structure, a smoke suction cooling structure and a detection alarm component. Electronic equipment is installed in the installation cabinet, a fireproof cotton frame is arranged in the installation cabinet, a fireproof space is arranged in the fireproof cotton frame, and the electronic equipment is located in the fireproof space; a fire extinguishing structure, a smoke suction cooling structure and a detection alarm component are arranged between the installation cabinet and the fireproof cotton frame. And the detection and alarm component gives an alarm when detecting that the temperature of the fireproof space rises to a threshold value. The smoke suction cooling structure comprises a fan and a gas channel; according to the electronic equipment installation cabinet, the technical problems that in the prior art, when a fire breaks out in an electronic equipment installation cabinet, an alarm is rapidly given to extinguish the fire, harmful substances in the cabinet are absorbed, and the electronic equipment installation cabinet is prevented from being burnt again are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cabinets, and in particular to a fireproof structure in a cabinet. Background Art

[0002] Electrical cabinets are enclosed metal cabinets used to install, protect and support electrical and electronic equipment. They are commonly used in industrial, commercial and residential applications to provide protection, organization and management of electrical and electronic components. Electrical and electronic equipment generates heat when working and is connected to the circuit. When a circuit failure causes electronic equipment to catch fire, it will burn quickly and release harmful smoke, which is harmful to human health.

[0003] The Chinese utility model patent with the name of "A fireproof safety cabinet" and the publication number CN218277422U that has been published includes a cabinet body and a flame-retardant and fireproof structure arranged on the outer wall of the cabinet body. The flame-retardant and fireproof structure includes an anti-static coating, which is applied on the outer wall of the cabinet body, and the outer wall of the anti-static coating is provided with heat dissipation holes. A fireproof net is provided on one side of the heat dissipation hole, and a connecting socket is installed inside the cabinet body. The device prevents static electricity from adsorbing dust by setting a flame-retardant and fireproof structure and utilizing the anti-static and dust-proof properties of the anti-static coating. Heat exchange between the inside and outside of the cabinet body is achieved through the heat dissipation holes, thereby improving the heat dissipation effect. At the same time, the fireproof net has fire-retardant and flame-retardant functions, and can also filter foreign matter from entering the interior, thereby achieving flame-retardant and fire-proof functions. However, when harmful substances produced by combustion in the cabinet are discharged by the device to the outside of the cabinet to achieve heat dissipation, causing certain safety hazards. Utility Model Content

[0004] The purpose of the present application is to provide a fireproof structure inside a cabinet, which solves the technical problems of quickly giving an alarm and extinguishing the fire when a fire occurs inside the cabinet where electronic equipment is installed, absorbing harmful substances inside the cabinet and preventing them from re-igniting.

[0005] In order to solve the above technical problems, the solution adopted by this application is as follows:

[0006] The utility model provides a fireproof structure in a cabinet, including an installation cabinet, a fireproof cotton rack, a fire extinguishing structure, a smoking cooling structure, and a detection alarm component;

[0007] Preferably, electronic equipment is installed inside the installation cabinet, a fireproof cotton rack is provided inside the installation cabinet, a fireproof space is provided inside the fireproof cotton rack, and the electronic equipment is located in the fireproof space; a fire extinguishing structure, a smoking cooling structure and a detection alarm component are provided between the installation cabinet and the fireproof cotton rack.

[0008] Preferably, the detection alarm component detects that the temperature of the fire protection space rises to a threshold value and issues an alarm.

[0009] Preferably, the smoking cooling structure includes a fan and a gas channel; the fan is arranged on the gas channel, both ends of the gas channel are located in the fireproof space, and a filter is provided on the gas channel.

[0010] Preferably, an explosion-proof iron net is provided between the fireproof cotton rack and the electronic equipment.

[0011] Preferably, a first fire door and a second fire door that can be opened and closed are provided at the front and rear of the installation cabinet.

[0012] Preferably, an equipment installation plate is further provided inside the installation cabinet, the equipment installation plate is located in a fireproof space, an explosion-proof iron mesh is fixedly installed on the equipment installation plate, and the electronic equipment is fixedly installed on the board surface of the equipment installation plate and covered by the explosion-proof iron mesh.

[0013] Preferably, the detection alarm component includes a first temperature sensor, a second temperature sensor, and an alarm light.

[0014] Preferably, the first temperature sensor is fixedly mounted on the outside of the fireproof cotton rack, the temperature probe of the first temperature sensor extends into the fireproof space of the fireproof cotton rack, the alarm light is fixedly mounted on the top of the outer shell of the installation cabinet, and the first temperature sensor is connected to the alarm light through a circuit.

[0015] Preferably, the second temperature sensor is slidably installed on the outside of the fireproof cotton rack, the temperature probe of the second temperature sensor extends into the fireproof space of the fireproof cotton rack, the temperature probe of the second temperature sensor is close to the electronic equipment, and the second temperature sensor is connected to the alarm light through a circuit.

[0016] Preferably, the fire extinguishing structure includes a storage cabinet, a fire extinguisher, a conveying pipeline, and a fixed pipe belt.

[0017] Preferably, the placement cabinet is fixedly installed on the outside of the fireproof cotton rack, the fire extinguisher is placed in the installation groove in the placement cabinet, the spray gun bell mouth of the fire extinguisher extends into the fixed pipe belt and is sleeved with the fixed pipe belt, the fixed pipe belt is connected to the inlet channel of the conveying pipeline, and the outlet channel of the conveying pipeline extends into the internal space of the fireproof cotton rack.

[0018] Preferably, the gas passage includes a dust storage chamber, a first ventilation duct, and a second ventilation duct.

[0019] Preferably, at least one layer of filter screen is arranged in the middle of the inner chamber of the ash storage chamber, the left end of the ash storage chamber is connected to the first ventilation duct, the first ventilation duct is connected to the fireproof space, the right end of the ash storage chamber is connected to the second ventilation duct, and the second ventilation duct is connected to the fireproof space.

[0020] Preferably, the pipe openings of the first ventilation duct and the second ventilation duct are both provided with fire insulation cotton.

[0021] The technical solution of the present application has at least the following advantages and beneficial effects:

[0022] When the electronic equipment in the cabinet catches fire, the fireproof cotton rack and explosion-proof iron net prevent the electronic equipment from burning and exploding, and spreading from the cabinet to the outside of the cabinet, causing a more serious fire; the temperature change during combustion will be detected by the detection alarm component to alarm, and the personnel will open the second fire door and open the fire extinguisher in the fireproof structure to extinguish the fire in the cabinet. The fire extinguisher can be replaced at any time, which is suitable and practical;

[0023] After the fire is extinguished, the smoke-smoke cooling structure sucks the hazardous smoke and the mist particles of the fire extinguishing agent generated by the burning of the electronic equipment into the ash storage chamber for collection, thus preventing subsequent staff from opening the cabinet and causing harm to personnel;

[0024] The detection alarm component continuously detects the temperature inside the cabinet when the smoking cooling structure is working. When the electronic equipment after the fire is extinguished reignites, the temperature change will be detected by the detection alarm component and an alarm will be sounded, reminding the staff to extinguish the fire again. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of the fire extinguishing structure in the device from the first angle.

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of the smoking cooling structure in the device from the first angle.

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure of the device.

[0029] Figure 5 This is a schematic cross-sectional view of the smoking cooling structure in the device from a second angle.

[0030] Figure 6 This is a schematic diagram of the cross-sectional structure of the fire extinguishing structure in the device from the second angle.

[0031] In the figure: 1-installation cabinet; 2-fireproof cotton rack; 3-explosion-proof iron net; 6-first temperature sensor; 7-second temperature sensor; 8-alarm light; 11-first fire door; 12-second fire door; 13-equipment installation plate; 21-fireproof cotton; 22-filter; 401-placement cabinet; 402-fire extinguisher; 403-conveying pipeline; 404-fixed pipe belt; 501-fan; 502-support seat; 503-fan blades; 504-ash storage chamber; 505-first ventilation duct; 506-second ventilation duct; 507-cylinder; 508-support plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. If the terms "center", "upper", "lower", "inner", "outer", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the figure, or the orientation or position relationship in which the product of the application is usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. It should also be noted that unless otherwise clearly specified and limited, if the terms "set", "install", and "connect" appear, they should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Example

[0035] Please refer to Figure 1-Figure 6 The utility model provides a fireproof structure in a cabinet, including an installation cabinet 1, a fireproof cotton rack 2, an explosion-proof iron net 3, a fire extinguishing structure, a smoking cooling structure and a detection alarm component.

[0036] Furthermore, electronic equipment is installed inside the installation cabinet 1. The electronic equipment generates heat when working and is prone to fire due to circuit damage. A fireproof cotton rack 2 is arranged inside the installation cabinet 1, and fireproof cotton is installed on the fireproof cotton rack 2. The fireproof cotton forms a closed fireproof space through the fireproof cotton rack 2. The electronic equipment is located in the fireproof space, and a fire in the electronic equipment will be isolated and blocked by the fireproof cotton rack 2. An explosion-proof iron net 3 is also arranged between the fireproof cotton rack 2 and the electronic equipment. When the electronic equipment catches fire and explodes, the explosion-proof iron net 3 blocks the fragments generated by the explosion of the electronic equipment to prevent cutting and damaging the surface of the fireproof cotton rack 2, thereby avoiding a decrease in the fireproof ability of the fireproof cotton rack 2.

[0037] Furthermore, a fire extinguishing structure, a smoking and cooling structure and a detection and alarm component are provided in the space between the installation cabinet 1 and the fireproof cotton rack 2. When the electronic equipment catches fire, the detection and alarm component detects that the temperature inside the fireproof cotton rack 2 rises to a certain value, and sends out an electrical signal to generate an alarm bell to remind the staff, and the staff activates the fire extinguishing structure to extinguish the fire inside the fireproof cotton rack 2; when the fire extinguishing structure completes the fire extinguishing, the smoking and cooling structure absorbs the particulate matter generated by the combustion inside the fireproof cotton rack 2 by wind, and then re-inputs the filtered gas into the fireproof cotton rack 2 to prevent the subsequent staff from opening the installation cabinet 1 and the harmful substances generated by the fire of the electronic equipment endangering the health of personnel, and it can also realize the flow of internal gas, accelerate the cooling of the internal space of the fireproof cotton rack 2, and the detection and alarm component continues to detect whether the internal space of the fireproof cotton rack 2 re-ignites. If re-ignition occurs and the temperature changes, it continues to send out electrical signals to generate an alarm bell, and re-extinguishes the fire through the fire extinguishing structure.

[0038] Furthermore, a first fire door 11 and a second fire door 12 are provided at the front and back of the installation cabinet 1, and both the first fire door 11 and the second fire door 12 are fireproof and explosion-proof components. The first fire door 11 can be opened to install and clean the electronic equipment in the installation cabinet 1, and the second fire door 12 can be opened to start the fire extinguishing structure provided inside the installation cabinet 1, and to inspect and maintain the fire extinguishing structure, the smoking cooling structure, and the detection and alarm components; an equipment installation plate 13 is also provided inside the installation cabinet 1, and the equipment installation plate 13 is completely wrapped by the fireproof cotton rack 2, and an explosion-proof iron net 3 is also fixedly installed on the equipment installation plate 13. The electronic equipment is installed on the board surface of the equipment installation plate 13 and is covered by the explosion-proof iron net 3. When the electronic equipment catches fire or explodes, it will be blocked and isolated by the explosion-proof iron net 3 and the fireproof cotton rack 2.

[0039] Furthermore, the detection alarm component includes a first temperature sensor 6 , a second temperature sensor 7 , and an alarm light 8 .

[0040] Specifically, the first temperature sensor 6 is installed on the top of the outer surface of the fireproof cotton rack 2, and the temperature probe of the first temperature sensor 6 passes through the fireproof cotton rack 2 and the explosion-proof iron net 3, and extends into the fireproof space to detect temperature changes. The alarm light 8 is fixedly installed on the top of the outer shell of the installation cabinet 1. The first temperature sensor 6 is connected to the alarm light 8 through a circuit. When the first temperature sensor 6 detects that the temperature rises to a certain value, it outputs an electrical signal to the alarm light 8, and the alarm light 8 generates an alarm ring; the second temperature sensor 7 is installed on the back of the outer surface of the fireproof cotton rack 2, and the second temperature sensor 7 is close to the bottom of the installation cabinet 1. The temperature probe of the second temperature sensor 7 passes through the fireproof cotton rack 2 and the explosion-proof iron net 3, and extends into the internal space of the fireproof cotton rack 2 to detect temperature changes. The temperature probe of the second temperature sensor 7 is close to the electronic equipment installed on the equipment installation plate 13 to detect the temperature changes generated when it reignites. The second temperature sensor 7 is also connected to the alarm light 8 through a circuit. When re-ignition occurs inside, the first temperature sensor 6 detects that the temperature rises to a certain value, and outputs an electrical signal to the alarm light 8. The alarm light 8 receives the electrical signal and sends out an alarm signal and light.

[0041] Preferably, the first temperature sensor 6 is located at the top of the fireproof space. When the electronic equipment catches fire for the first time, the fire is large and the high temperature is conducted to the top of the fireproof space, so that the first temperature sensor 6 detects it, thereby reminding to extinguish the fire.

[0042] Preferably, the second temperature sensor 7 is located in the lower middle part of the fireproof space, close to the electronic equipment. When the electronic equipment has been extinguished and the fireproof space begins to cool down, if the electronic equipment reignites at this time, the fire will be smaller and the temperature change will be smaller. Therefore, the detection effect of the first temperature sensor 6 will be relatively slow. At this time, the second temperature sensor 7 close to the electronic equipment is needed to detect the small-scale temperature changes when the fire reignites.

[0043] Furthermore, the fire extinguishing structure includes a storage cabinet 401, a fire extinguisher 402, a delivery pipeline 403, and a fixed pipe belt 404.

[0044] Specifically, the storage cabinet 401 is fixedly installed between the second fire door 12 and the back of the fireproof cotton rack 2, and is used to store the fire extinguisher 402. The fire extinguisher 402 is pull-out installed in the installation groove in the storage cabinet 401. The fire extinguisher 402 is a dry powder fire extinguisher or a carbon dioxide fire extinguisher commonly used on the market. The spray gun bell mouth of the fire extinguisher 402 extends into the fixed pipe belt 404 and is sleeved with the fixed pipe belt 404. The fixed pipe belt 404 is made of a relatively soft material. The outer surface of the fixed pipe belt 404 is locked by a throat clamp, and the inner wall of the fixed pipe belt 404 is tightly fitted to the spray gun bell mouth of the fire extinguisher 402 to prevent the fire extinguishing agent from leaking from the spray gun mouth; the fixed pipe belt 404 is arranged at the inlet channel of the conveying pipe 403, and the outlet channel of the conveying pipe 403 passes through the top of the fireproof cotton rack 2, and extends into the internal space of the fireproof cotton rack 2, so as to convey the fire extinguishing agent generated by the fire extinguisher 402 to the combustion position of the fireproof space for fire extinguishing.

[0045] The pipe mouth of the conveying pipeline 403 is provided with fire-proof cotton 21, and the fire-proof cotton 21 is made of the same material as the fire-proof cotton rack 2, which isolates the flame inside the fire-proof cotton rack 2 and prevents open flame from entering the pipeline of the conveying pipeline 403.

[0046] Specifically, when the detection alarm component sounds an alarm, the staff opens the second fire door 12, turns on the fire extinguisher 402, and sprays the fire extinguishing agent in the fire extinguisher 402 from the pipe of the delivery pipe 403 into the combustion position inside the fireproof space to extinguish the burning electronic equipment; the fire extinguisher 402 is a disposable consumable. When replacing the fire extinguisher 402, loosen the throat clamp fixing the outer wall of the pipe belt 404, pull out the spray gun bell mouth of the fire extinguisher 402, and the entire fire extinguisher 402 can be removed for replacement.

[0047] Furthermore, the smoking cooling structure includes a fan 501, a support base 502, fan blades 503, an ash storage chamber 504, a first ventilation duct 505, a second ventilation duct 506, a cylinder 507, a support plate 508, and a filter screen 22.

[0048] Specifically, the fan 501 is arranged on the top of the outer surface of the fireproof cotton rack 2, and is located inside the installation cabinet 1. The fan 501 is fixedly installed on the support seat 502, and the support seat 502 is fixedly installed on the outer surface of the fireproof cotton rack 2. The fan 501 drives the fixedly connected fan blades 503 to rotate through the driving shaft. The fan blades 503 are located inside the dust storage chamber 504. The interior of the dust storage chamber 504 is a chamber for collecting particulate matter such as smoke. At least one layer of filter screen 22 is arranged in the middle of the internal chamber of the dust storage chamber 504 to filter and collect harmful particulate matter in the gas entering the chamber. The left end of the dust storage chamber 504 is connected to the first ventilation duct 505, and the right end of the dust storage chamber 504 is connected to the second ventilation duct 506.

[0049] The first ventilation duct 505 is connected to the internal space of the fireproof cotton rack 2. Harmful substances produced by the combustion inside the fireproof cotton rack 2 are sucked into the chamber of the ash storage chamber 504 from the first ventilation duct 505. The second ventilation duct 506 is also connected to the fireproof space. The gas filtered by the filter net 22 in the chamber of the ash storage chamber 504 is blown into the fireproof space of the fireproof cotton rack 2 from the second ventilation duct 506.

[0050] The pipe openings of the first ventilation duct 505 and the second ventilation duct 506 are both provided with fire-proof cotton 21 to prevent open flames from entering the ash storage chamber 504 and igniting the filter screen 22 .

[0051] A cylinder 507 is fixedly installed on the back of the fireproof cotton rack 2, and the cylinder 507 is close to the bottom of the installation cabinet 1. The push rod of the cylinder 507 is fixedly connected to the support plate 508, and the second temperature sensor 7 is fixedly installed on the support plate 508. The fireproof cotton rack 2 and the explosion-proof iron net 3 are provided with avoidance openings. The second temperature sensor 7 is pushed back and forth by the push rod of the cylinder 507. The temperature probe of the second temperature sensor 7 slides in the fireproof space through the avoidance opening to detect the re-ignition of the electronic equipment installed on the equipment installation plate 13. The sliding direction of the second temperature sensor 7 remains parallel to the installation plate surface of the equipment installation plate 13.

[0052] After the fire extinguishing structure has extinguished the fire, the smoking and cooling structure works, and the fan blades 503 rotate to drive the gas in the ash storage chamber 504 to start flowing, and the flow direction is from the outlet of the first ventilation duct 505 to the inlet of the second ventilation duct 506. When the electronic equipment in the internal space of the fireproof cotton rack 2 burns, harmful substances are generated, and the particles sprayed by the dry powder fire extinguisher 402 are sucked into the chamber of the ash storage chamber 504 from the trumpet-shaped inlet of the first ventilation duct 505, and are filtered by the filter net 22 to adsorb and collect harmful particles, and the filtered gas is re-transported from the trumpet-shaped outlet of the second ventilation duct 506 to the fireproof space, so as to avoid harmful substances being deposited in the combustion position and harming the personnel who carry out subsequent processing work; the gas in the device flows through the smoking and cooling structure, takes away the heat from the combustion part, realizes internal cooling, and avoids the re-ignition phenomenon that the inside of the device is under high temperature.

[0053] After the fire extinguishing structure extinguishes the fire, the push rod of the cylinder 507 reciprocates, driving the second temperature sensor 7 to move back and forth to detect the temperature of the burned electronic equipment close to it. If the electronic equipment re-ignites after the fire extinguishing structure extinguishes the fire, the temperature change will be detected by the second temperature sensor 7. After the temperature rises to a certain value, the second temperature sensor 7 transmits an electrical signal to the alarm light 8, and the alarm light 8 generates an alarm bell to remind the staff to continue to extinguish the fire through the fire extinguishing structure.

[0054] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution of the present invention, and the scope of the present invention is defined by the attached claims.

Claims

1. A fire protection structure inside a cabinet, characterized in that: It includes an installation cabinet (1), a fireproof cotton rack (2), a fire extinguishing structure, a smoking cooling structure, and a detection alarm component; Electronic equipment is installed inside the installation cabinet (1), a fireproof cotton rack (2) is arranged inside the installation cabinet (1), a fireproof space is arranged inside the fireproof cotton rack (2), and the electronic equipment is located in the fireproof space; a fire extinguishing structure, a smoking cooling structure and a detection alarm component are arranged between the installation cabinet (1) and the fireproof cotton rack (2); A detection alarm component detects that the temperature of the fireproof space rises to a threshold value and issues an alarm; The smoking cooling structure comprises a fan (501) and a gas channel; the fan is arranged on the gas channel, both ends of the gas channel are located in the fireproof space, and a filter screen (22) is arranged on the gas channel.

2. According to the fire protection structure in the cabinet as described in claim 1, it is characterized in that: An explosion-proof iron net (3) is arranged between the fireproof cotton rack (2) and the electronic equipment.

3. According to the fire protection structure in the cabinet as described in claim 1, it is characterized in that: The installation cabinet (1) is provided with a first fireproof door (11) and a second fireproof door (12) which can be opened and closed at the front and rear.

4. According to the fire protection structure in the cabinet as described in claim 2, it is characterized in that: An equipment installation plate (13) is also provided inside the installation cabinet (1), the equipment installation plate (13) is located in a fireproof space, an explosion-proof iron net (3) is fixedly mounted on the equipment installation plate (13), and electronic equipment is fixedly mounted on the plate surface of the equipment installation plate (13) and is covered by the explosion-proof iron net (3).

5. According to the fire protection structure in the cabinet as described in claim 1, it is characterized in that: The detection alarm component comprises a first temperature sensor (6), a second temperature sensor (7), and an alarm light (8); The first temperature sensor (6) is fixedly mounted on the outside of the fireproof cotton rack (2), and the temperature probe of the first temperature sensor (6) extends into the fireproof space of the fireproof cotton rack (2). The alarm light (8) is fixedly mounted on the top of the housing of the installation cabinet (1), and the first temperature sensor (6) is connected to the alarm light (8) via a circuit. The second temperature sensor (7) is slidably mounted on the outside of the fireproof cotton rack (2), the temperature probe of the second temperature sensor (7) extends into the fireproof space of the fireproof cotton rack (2), the temperature probe of the second temperature sensor (7) is close to the electronic equipment, and the second temperature sensor (7) is connected to the alarm light (8) through a circuit.

6. According to the fire protection structure in the cabinet as described in claim 1, it is characterized in that: The fire extinguishing structure comprises a storage cabinet (401), a fire extinguisher (402), a conveying pipeline (403), and a fixed pipe belt (404); The placement cabinet (401) is fixedly installed on the outside of the fireproof cotton rack (2), and the fire extinguisher (402) is placed in a mounting groove in the placement cabinet (401). The spray gun bell mouth of the fire extinguisher (402) extends into the fixed pipe belt (404) and is sleeved with the fixed pipe belt (404). The fixed pipe belt (404) is connected to the inlet channel of the conveying pipeline (403), and the outlet channel of the conveying pipeline (403) extends into the internal space of the fireproof cotton rack (2).

7. According to the fire protection structure in the cabinet as described in claim 1, it is characterized in that: The gas passage comprises a dust storage chamber (504), a first ventilation duct (505), a second ventilation duct (506), At least one layer of filter screen (22) is arranged in the middle of the internal cavity of the ash storage chamber (504); the left end of the ash storage chamber (504) is connected to the first ventilation duct (505), and the first ventilation duct (505) is connected to the fireproof space; the right end of the ash storage chamber (504) is connected to the second ventilation duct (506), and the second ventilation duct (506) is connected to the fireproof space.

8. According to the fire protection structure in the cabinet as claimed in claim 7, it is characterized in that: The pipe openings of the first ventilation duct (505) and the second ventilation duct (506) are both provided with fire-proof cotton (21).

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