Ventilation and smoke exhaust system and ventilation and smoke exhaust method for cargo hold of automobile transport ship

Abstract

The invention discloses a ventilation and smoke exhaust system for a cargo hold of an automobile transport ship. The ventilation and smoke exhaust system is composed of a cargo hold blower, a cargo hold reversible fan, a cargo hold ventilation device, a cargo hold exhaust outlet, a foam fire extinguishing device, a temperature sensor and a fire alarm device. The smoke exhaust method is achieved through the smoke exhaust system, and the cargo hold air feeder and the cargo hold reversible fan arranged on the system meet the ventilation frequency of the cargo hold loading and unloading working condition required by specifications; when the cargo hold reversible fan is in the reversible exhaust state, the cargo hold blower can meet the ventilation frequency of the cargo hold navigation working condition. The system is controlled by signals of the fire alarm device, when a fire occurs in the cargo hold, fire extinguishing is conducted on the cargo hold through the foam fire extinguishing device, the cargo hold reversible draught fan serves as a smoke exhaust draught fan to conduct smoke exhaust, and smoke exhaust control is conducted through a temperature sensor on an air supply and exhaust pipeline. The fire extinguishing and smoke discharging functions are integrated while the number of ventilation times of the cargo hold specified by the specification is met, the specification requirements of the cargo hold for loading the new energy vehicle are met, and the environmental safety of the cargo hold is ensured.

Description

Technical Field

[0001] The invention relates to a ventilation and smoke exhaust system and a ventilation and smoke exhaust method for a cargo hold of a car transport ship, belonging to the technical field of shipbuilding. Background Art

[0002] In recent years, my country's electric vehicle industry has developed rapidly. However, the safety of electric vehicles has always been one of the biggest challenges in the development of electric vehicles. As the main power source of electric vehicles, power batteries play a vital role in the safety of electric vehicles. Therefore, when loading and transporting new energy vehicles on car carriers, the thermal runaway problem of power batteries needs to be given enough attention by ventilation system designers. The gas production during the use of power batteries of new energy vehicles will increase the internal pressure of the battery, and the flammable gas in the gas production components will increase the risk of thermal runaway. The process usually releases a large amount of smoke containing toxic, harmful, flammable and explosive gases. Therefore, the design of the ventilation, fire extinguishing and smoke exhaust system of the cargo hold of car carriers is very important.

[0003] At present, there are few relevant specifications and requirements from foreign classification societies for cargo hold ventilation of car carriers carrying new energy vehicles. Only CCS-"Technical Guidelines for Safety of Ro-Ro Transport of New Energy Vehicles" 2022 mentions the design requirements for cargo hold ventilation systems of PCTC ships carrying new energy vehicles: (1) Mechanical ventilation systems of closed cargo holds, ro-ro spaces and special spaces. The design of the ventilation system should fully consider the diffusion characteristics of flammable gases that may leak or release from vehicle power batteries or fuel to prevent air stratification and the formation of air pockets; when there are new energy vehicles in the space, the fan should work continuously. (2) Closed cargo holds, ro-ro spaces and special spaces should be equipped with mechanical smoke exhaust systems. The exhaust fan capacity should meet at least 6 air changes per hour to exhaust the smoke in the space; when the exhaust duct inlet temperature reaches 280°C, all smoke exhaust fans in the space should be automatically shut down.

[0004] However, conventional cargo hold ventilation of automobile carriers only has ventilation systems to meet the air change frequency requirements under different working conditions. If another set of smoke exhaust system is set up to meet the smoke exhaust requirements of the regulations, it will not only increase the construction cost, but also make it difficult to arrange another smoke exhaust duct in the cargo hold due to the limited layout space. Therefore, there is an urgent need for a ventilation and smoke exhaust system that can take into account both ventilation requirements and fire smoke exhaust requirements. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the cargo hold ventilation of existing automobile carriers is only provided with a ventilation system to meet the ventilation frequency requirements under different working conditions. If a smoke exhaust system is provided separately, it will not only increase the construction cost but also cause the problem of insufficient layout space.

[0006] In order to solve the above technical problems, the present invention provides a ventilation and smoke exhaust system and a ventilation and smoke exhaust method for the cargo hold of a car transport ship. The design of the system meets a variety of operating conditions, which can not only meet the conventional cargo hold ventilation needs, but also meet the needs of fire extinguishing and smoke exhaust when a fire occurs, without increasing additional equipment costs and air duct layout.

[0007] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0008] In a first aspect, the present invention provides a ventilation and smoke exhaust system for a cargo hold of a car transport ship, comprising:

[0009] The cargo hold blower has an air supply pipe extending into the cargo hold of the car carrier to supply external air into the cargo hold of the car carrier for ventilation, and serves as auxiliary air supply in the accident smoke exhaust condition;

[0010] The cargo hold reversible fan has a supply and exhaust air pipeline extending into the cargo hold of the car carrier to realize the conversion operation of ventilation and exhaust in the cargo hold of the car carrier;

[0011] A cargo hold ventilation device is connected to the cargo hold blower and the cargo hold reversible blower respectively as the air inlet and outlet of the cargo hold blower. The air supply pipe of the cargo hold blower and the air supply and exhaust pipe of the cargo hold reversible blower are both provided with at least one vent at the end of the pipe extending into the cargo hold, so as to evenly supply outdoor air to or discharge it from the cargo hold;

[0012] The cargo hold exhaust vent is installed on the outer wall of the cargo hold of the car carrier as a natural exhaust vent for cargo hold air during loading and unloading conditions and navigation conditions;

[0013] A foam fire extinguishing device is arranged on the air supply pipeline of the cargo hold blower and is respectively connected to the high-power foam fire extinguishing system and the compressed air pipeline on the ship. The foam fire extinguishing device has a foam outlet connected to the air supply pipeline of the cargo hold blower. A check damper is arranged in the air supply pipeline between the air supply port of the cargo hold blower and the foam outlet. An electric stop valve is arranged between the compressed air pipeline and the foam fire extinguishing device.

[0014] a temperature sensor, arranged in the supply and exhaust air duct of the cargo hold reversible fan for monitoring the exhaust air temperature;

[0015] Fire alarm device, installed in the cargo hold, used for fire alarm and output alarm signal;

[0016] A PLC control box is arranged in the cargo hold and is electrically connected to the cargo hold blower, the cargo hold reversible blower, the electric stop valve, the temperature sensor and the fire alarm device, and is used for controlling the opening and closing of each electrical component.

[0017] Preferably, at least one cargo hold blower and at least one cargo hold reversible blower are provided, and the number of cargo hold blowers and cargo hold reversible blowers is determined according to the cabin volume and ventilation frequency of the cargo hold of the automobile transport ship.

[0018] Preferably, the cargo hold ventilation device includes but is not limited to a fan room, a ventilator or a shutter type; the cargo hold exhaust vent includes but is not limited to a shutter or other opening type window.

[0019] Preferably, the cargo hold reversible fan is a high temperature resistant fan and can operate normally below 280°C.

[0020] In a second aspect, the present invention provides a method for ventilation and smoke exhaust in a cargo hold of a car carrier, which uses the above-mentioned ventilation and smoke exhaust system for the cargo hold of a car carrier to perform ventilation and smoke exhaust operations, comprising the following steps:

[0021] During loading and unloading, the cargo hold blower and the cargo hold reversible blower simultaneously supply air to the cargo hold, and exhaust the air naturally through the cargo hold exhaust port, and the ventilation frequency is at least 20 times / hour;

[0022] During navigation, the cargo hold is supplied with air by the cargo hold blower, and the reversible blower in the cargo hold is switched to exhaust operation to assist the natural exhaust of the cargo hold, and the ventilation frequency is at least 10 times / hour;

[0023] During the accident smoke exhaust condition, the cargo hold supply fan stops operating, and the cargo hold reversible fan switches to exhaust operation. The fire alarm device monitors whether there is a fire. If there is a fire, the foam fire extinguishing device performs fire extinguishing operation, and the ventilation frequency is at least 6 times / hour.

[0024] Preferably, the accidental smoke exhaust condition is monitored by the temperature sensor and the fire alarm device, and the monitoring signal is fed back to the PLC control box, which switches the operation of the cargo hold fan and the cargo hold reversible fan and the action of the electric stop valve.

[0025] Furthermore, during the accident smoke exhaust condition, if the fire alarm device sends out a fire alarm signal, the electric stop valve opens, and the foam fire extinguishing device connected to the high-multiple foam fire extinguishing system on the ship produces fire extinguishing foam, and then the compressed air pipeline is filled with compressed air to blow the foam produced by the foam fire extinguishing device into the cargo hold through the air supply pipeline and the vent to extinguish the fire; under loading and unloading conditions and navigation conditions, the electric stop valve of the compressed air pipeline is closed to carry out normal air supply.

[0026] Furthermore, in the accident smoke exhaust condition, if the foam fire extinguishing device performs a fire extinguishing operation, the check damper is used to prevent backflow in the air supply pipeline when compressed air blows the foam.

[0027] Furthermore, in the accident smoke exhaust condition, if the temperature detected by the temperature sensor reaches 280°C, the reversible fan of the cargo hold stops operating.

[0028] Preferably, the supply and exhaust air ducts of the reversible fan in the cargo hold serve as supply air ducts during loading and unloading conditions; serve as exhaust air ducts during navigation conditions; and serve as smoke exhaust ducts during accident smoke exhaust conditions.

[0029] The ventilation and smoke exhaust system and ventilation and smoke exhaust method for a cargo hold of a car transport ship provided by the present invention have the following advantages:

[0030] 1. The ventilation and smoke exhaust system and ventilation and smoke exhaust method for the cargo hold of a car carrier provided by the present invention can be used in the cargo hold of a car carrier. On the basis of meeting the ventilation frequency, ventilation volume and smoke exhaust requirements required by the specifications, a set of systems can be used to realize the mutual switching of three working conditions, perfectly combining the ventilation, fire prevention and smoke exhaust functions, reducing the construction cost of the cargo hold ventilation system, and achieving the purpose of optimizing the cargo hold ventilation system of a car carrier.

[0031] 2. The ventilation and smoke exhaust system for the cargo hold of a car carrier provided by the present invention is composed of a cargo hold blower, a reversible cargo hold blower (also serving as a high-temperature smoke exhaust fan), a cargo hold ventilation device, a cargo hold exhaust port, an electric stop valve, a foam fire extinguishing device, a check air damper; a vent, a temperature sensor, a PLC control box and a fire alarm device. It is used in the cargo hold of a car carrier and can achieve mutual switching among three working conditions on the basis of meeting the requirements of the specifications for ventilation times, ventilation volume and smoke exhaust, perfectly combining the functions of ventilation, fire prevention and smoke exhaust, reducing the construction cost of the cargo hold ventilation system and achieving the purpose of optimizing the cargo hold ventilation system of a car carrier.

[0032] 3. The present invention can use a blower to supply air to the cargo hold during loading and unloading conditions, and exhaust air naturally to meet the ventilation frequency requirement of 20 times / hour; during navigation conditions, a blower is used to supply air, and another blower is reversible to exhaust air to assist natural exhaust to meet the ventilation frequency requirement of 10 times / hour; during accident smoke exhaust conditions, a compressed air foam fire extinguishing device is used, and the reversible exhaust fan also serves as a smoke exhaust fan to extinguish fire and exhaust smoke in the cargo hold, while meeting the ventilation frequency requirement of 6 times / hour, meeting the regulatory requirements, and ensuring the safety of vehicles and equipment in the cargo hold of automobile transport ships.

[0033] 4. The electric stop valve of the present invention is connected to the ship's compressed air system and is opened in an accident smoke exhaust condition. The compressed air blows the foam generated by the foam fire extinguishing device into the cargo hold through the air supply pipeline and the vent to extinguish the fire. The electric stop valve of the compressed air pipeline is closed in loading and unloading conditions and navigation conditions to carry out normal air supply.

[0034] 5. The cargo hold reversible fan used in the present invention also serves as a high-temperature smoke exhaust fan and can operate normally below 280°C. It serves as a blower during loading and unloading, an exhaust fan during navigation, and a smoke exhaust fan during accident smoke exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A system structure diagram of a ventilation and smoke exhaust system for a cargo hold of a car transport ship provided by the present invention.

[0036] In the figure:

[0037] 1-Cargo hold air supply fan; 11-air supply duct; 2-Cargo hold reversible fan; 21-supply and exhaust air duct; 3-Cargo hold ventilation device; 4-Cargo hold exhaust vent; 5-Ventilation vent; 6-Foam fire extinguishing device; 7-Electric stop valve; 8-Check air damper; 9-Temperature sensor; 10-Fire alarm device; 12-PLC control box. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0039] Reference Figure 1 , the present application provides a ventilation and smoke exhaust system for a cargo hold of a car transport ship, comprising a cargo hold blower 1, a cargo hold reversible blower 2, a cargo hold ventilation device 3 and a cargo hold exhaust port 4;

[0040] The cargo hold blower 1 and the cargo hold reversible blower 2 are both installed in the cargo hold and at least one of them is installed. The number of the cargo hold blower 1 and the cargo hold reversible blower 2 is determined according to the volume of the cargo hold of the car carrier and the number of ventilation times. The cargo hold blower 1 has an air supply pipeline 11 extending into the cargo hold of the car carrier to supply external air into the cargo hold of the car carrier for ventilation, and serves as auxiliary air supply in the accident smoke exhaust condition. The cargo hold reversible blower 2 has an air supply and exhaust pipeline 21 extending into the cargo hold of the car carrier to realize the conversion operation of ventilation and exhaust in the cargo hold of the car carrier. The cargo hold ventilation device 3 is respectively connected to the cargo hold blower 1 and the cargo hold reversible blower 2 as the air inlet and outlet of the cargo hold fan. The air supply pipeline 11 of the cargo hold blower 1 and the cargo hold reversible blower The ends of the supply and exhaust air ducts 21 of 2 extending into the cargo hold are each equipped with at least one vent 5 for evenly delivering outdoor air to or discharging it from the cargo hold; the cargo hold exhaust vent 4 is installed on the outer wall of the cargo hold of the automobile carrier as a natural exhaust vent for the cargo hold air during loading and unloading conditions and navigation conditions. In this embodiment, due to the high exhaust smoke temperature during a fire, the cargo hold reversible fan 2 is preferably a high-temperature resistant fan and can also serve as a high-temperature smoke exhaust fan, which can operate normally below 280°C. The use of the cargo hold supply fan 1 and the cargo hold reversible fan 2 are both prior arts and will not be elaborated on. The cargo hold ventilation device 3 includes but is not limited to a fan room, a ventilator or a shutter type; the cargo hold exhaust vent 4 includes but is not limited to a shutter or other opening type window.

[0041] Reference Figure 1 , a ventilation and smoke exhaust system for a cargo hold of a car transport ship, further comprising a foam fire extinguishing device 6, a temperature sensor 9, a fire alarm device 10 and a PLC control box 12;

[0042] The foam fire extinguishing device 6 is installed on the air supply pipeline 11 of the cargo hold fan 1 and is respectively connected to the high-multiple foam fire extinguishing system and the compressed air pipeline on the ship. The foam fire extinguishing device 6 has a foam outlet connected to the air supply pipeline 11 of the cargo hold fan 1. A check damper 8 is installed in the air supply pipeline 11 between the air supply port of the cargo hold fan 1 and the foam outlet, and an electric stop valve 7 is installed between the compressed air pipeline and the foam fire extinguishing device 6. In this embodiment, the foam fire extinguishing device 6 is a fire extinguishing device composed of a foam liquid storage tank, a foam fire pump, a foam proportioning mixer, a foam generator, a control valve and a pipeline. The settings of the high-multiple foam fire extinguishing system and the compressed air pipeline on the ship are all existing technologies and will not be elaborated in detail.

[0043] When a fire accident occurs, the foam fire extinguishing device 6 cooperates with the high-multiple foam fire extinguishing system to produce fire extinguishing foam, and then produces compressed air through the compressed air pipeline on the ship. The fire extinguishing foam is delivered to the cargo hold through the air supply pipeline 11 and the vent 5 by the compressed air, thereby achieving fire extinguishing; the setting of the electric stop valve 7 makes the compressed air pipeline closed during loading and unloading conditions and navigation conditions, and opened during accident smoke exhaust conditions; the check damper 8 is installed on the air supply pipeline 11 to prevent backflow when compressed air blows foam.

[0044] Furthermore, a temperature sensor 9 is installed in the supply and exhaust air duct 21 of the cargo hold reversible fan 2 for monitoring the exhaust air temperature, so that the cargo hold reversible fan 2 can be coordinated to be shut down when the temperature in the cargo hold is higher than 280°C; a fire alarm device 10 is installed in the cargo hold for fire alarm and output alarm signals; a PLC control box 12 is installed in the cargo hold and is electrically connected to the cargo hold fan 1, the cargo hold reversible fan 2, the electric stop valve 7, the temperature sensor 9 and the fire alarm device 10, for controlling the opening and closing of each electrical component, and is mainly used to receive the temperature signal of the temperature sensor 9 and the alarm signal of the fire alarm device 10, and to feedback control the operating conditions to switch the operation of the cargo hold fan 1, the cargo hold reversible fan 2 and the action of the electric stop valve 7. In this embodiment, the control and application of the PLC control box 12 and the installation and application of the temperature sensor 9 and the fire alarm device 10 are all prior arts and will not be elaborated on.

[0045] The present invention also provides a method for ventilation and smoke exhaust in a cargo hold of a car transport ship, which uses the above-mentioned ventilation and smoke exhaust system for the cargo hold of a car transport ship to perform ventilation and smoke exhaust operations, comprising the following steps:

[0046] Step 1: During loading and unloading, the cargo hold blower 1 and the cargo hold reversible blower 2 simultaneously supply air to the cargo hold. At this time, the supply and exhaust air pipeline 21 of the cargo hold reversible blower 2 serves as an air supply pipe, and exhausts air naturally through the cargo hold exhaust port 4. The ventilation frequency is at least 20 times / hour. The on / off control of the cargo hold blower 1 and the cargo hold reversible blower 2 is preferably achieved by the operator controlling the PLC control box 12, and can also be achieved by installing more sensors in conjunction with the PLC control box 12.

[0047] Step 2: During navigation, the cargo hold is supplied with air by the cargo hold blower 1, and the cargo hold reversible blower 2 is switched to exhaust operation to assist the natural exhaust of the cargo hold. At this time, the supply and exhaust air duct 21 of the cargo hold reversible blower 2 is used as an exhaust duct, and the ventilation frequency is at least 10 times / hour. The on-off control of the cargo hold blower 1 and the cargo hold reversible blower 2, as well as the supply and exhaust air switching of the cargo hold reversible blower 2 are preferably realized by the operator controlling the PLC control box 12, and can also be realized by installing more sensors in conjunction with the PLC control box 12;

[0048] Step 3: In the accident smoke exhaust condition, the cargo hold air supply fan 1 stops operating, and the cargo hold reversible fan 2 switches to exhaust operation. The fire alarm device 10 monitors whether there is a fire. If there is no fire, the cargo hold reversible fan 2 performs air supply or exhaust operation according to the loading and unloading condition or the navigation condition; if there is a fire, the foam fire extinguishing device 6 performs fire extinguishing operation. At this time, the air supply and exhaust pipeline 21 of the cargo hold reversible fan 2 is used as a smoke exhaust duct, and the ventilation frequency is at least 6 times / hour. Specifically:

[0049] The accident smoke exhaust condition is monitored by the temperature sensor 9 and the fire alarm device 10, and the monitoring signal is fed back to the PLC control box 12. The PLC control box 12 switches the operation of the cargo hold air supply fan 1 and the cargo hold reversible fan 2 and the action of the electric stop valve 7. If the fire alarm device 10 detects a fire, it will send out a fire alarm signal and feed back the fire alarm signal to the PLC control box 12. The PLC control box 12 sends out a control signal to open the electric stop valve 7, and the foam fire extinguishing device 6 connected to the high-multiple foam fire extinguishing system on the ship produces fire extinguishing foam, and then the compressed air pipeline is filled with compressed air to blow the foam produced by the foam fire extinguishing device 6 into the cargo hold through the air supply pipeline 11 and the ventilation port 5 for fire extinguishing; if the temperature detected by the temperature sensor 9 reaches 280°C, the temperature signal is transmitted to the PLC control box 12, and the PLC control box 12 sends out a control signal to stop the cargo hold reversible fan 2; under loading and unloading conditions and navigation conditions, the electric stop valve 7 of the compressed air pipeline is closed for normal air supply.

[0050] Furthermore, in the accident smoke exhaust condition, if the foam fire extinguishing device 6 performs a fire extinguishing operation, the check damper 8 prevents the compressed air from flowing back in the air supply pipeline 11 when blowing the foam.

[0051] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A ventilation and smoke exhaust system for a cargo hold of a car carrier, characterized in that: include: The cargo hold blower has an air supply pipe extending into the cargo hold of the car carrier to supply external air into the cargo hold of the car carrier for ventilation, and serves as auxiliary air supply in the accident smoke exhaust condition; The cargo hold reversible fan has a supply and exhaust air pipeline extending into the cargo hold of the car carrier to realize the conversion operation of ventilation and exhaust in the cargo hold of the car carrier; The cargo hold ventilation device is connected to the cargo hold blower and the cargo hold reversible blower respectively as the air inlet and outlet of the cargo hold blower. The air supply pipe of the cargo hold blower and the air supply and exhaust pipe of the cargo hold reversible blower extending into the cargo hold are both provided with at least one ventilating port at the end of the pipe, which is used to evenly deliver outdoor air to the cargo hold or discharge it from the cargo hold; the cargo hold exhaust port is arranged on the outer wall of the cargo hold of the automobile transport ship as a natural exhaust port for cargo hold air during loading and unloading conditions and navigation conditions; A foam fire extinguishing device is arranged on the air supply pipeline of the cargo hold blower and is respectively connected to the high-power foam fire extinguishing system and the compressed air pipeline on the ship. The foam fire extinguishing device has a foam outlet connected to the air supply pipeline of the cargo hold blower. A check damper is arranged in the air supply pipeline between the air supply port of the cargo hold blower and the foam outlet. An electric stop valve is arranged between the compressed air pipeline and the foam fire extinguishing device. a temperature sensor, arranged in the supply and exhaust air duct of the reversible fan in the cargo hold, for monitoring the exhaust air temperature; a fire alarm device, arranged in the cargo hold, for fire alarm and outputting an alarm signal; A PLC control box is arranged in the cargo hold and is electrically connected to the cargo hold blower, the cargo hold reversible blower, the electric stop valve, the temperature sensor and the fire alarm device, and is used for controlling the opening and closing of each electrical component.

2. The ventilation and smoke exhaust system for the cargo hold of a car carrier according to claim 1, characterized in that: At least one cargo hold blower and at least one cargo hold reversible blower are provided, and the number of cargo hold blowers and cargo hold reversible blowers is determined according to the volume of the cargo hold of the automobile transport ship and the number of ventilation times.

3. The ventilation and smoke exhaust system for the cargo hold of a car carrier according to claim 1, characterized in that: The cargo hold ventilation device includes but is not limited to a fan room, a ventilator or a shutter type; the cargo hold exhaust vent includes but is not limited to a shutter or other opening type window.

4. The ventilation and smoke exhaust system for the cargo hold of a car carrier according to claim 1, characterized in that: The cargo hold reversible fan is a high temperature resistant fan and can operate normally below 280°C.

5. A method for ventilation and smoke exhaust in a cargo hold of a car transport ship, characterized in that: The ventilation and smoke exhaust operation is performed by using the ventilation and smoke exhaust system for the cargo hold of a car carrier as described in any one of claims 1 to 4, comprising the following steps: During loading and unloading, the cargo hold blower and the cargo hold reversible blower simultaneously supply air to the cargo hold, and exhaust the air naturally through the cargo hold exhaust port, and the ventilation frequency is at least 20 times / hour; During navigation, the cargo hold is supplied with air by the cargo hold blower, and the reversible blower in the cargo hold is switched to exhaust operation to assist the natural exhaust of the cargo hold, and the ventilation frequency is at least 10 times / hour; During the accident smoke exhaust condition, the cargo hold supply fan stops operating, and the cargo hold reversible fan switches to exhaust operation. The fire alarm device monitors whether there is a fire. If there is a fire, the foam fire extinguishing device performs fire extinguishing operation, and the ventilation frequency is at least 6 times / hour.

6. The method for ventilation and smoke exhaust in a cargo hold of a car carrier as claimed in claim 5, characterized in that: The accident smoke exhaust condition is monitored by the temperature sensor and the fire alarm device, and the monitoring signal is fed back to the PLC control box, which switches the operation of the cargo hold fan and the cargo hold reversible fan and the action of the electric stop valve.

7. The method for ventilation and smoke exhaust in a cargo hold of a car carrier as claimed in claim 6, characterized in that: During the accident smoke exhaust condition, if the fire alarm device sends out a fire alarm signal, the electric stop valve opens, and the foam fire extinguishing device connected to the high-multiple foam fire extinguishing system on the ship produces fire extinguishing foam, and then the compressed air pipeline is filled with compressed air to blow the foam produced by the foam fire extinguishing device into the cargo hold through the air supply pipeline and the vent to extinguish the fire; under loading and unloading conditions and navigation conditions, the electric stop valve of the compressed air pipeline is closed to carry out normal air supply.

8. The method for ventilation and smoke exhaust in a cargo hold of a car carrier as claimed in claim 7, characterized in that: During the accident smoke exhaust condition, if the foam fire extinguishing device performs a fire extinguishing operation, the check damper is used to prevent backflow in the air supply pipeline when compressed air blows the foam.

9. The method for ventilation and smoke exhaust in a cargo hold of a car carrier as claimed in claim 6, characterized in that: In the accident smoke exhaust condition, if the temperature detected by the temperature sensor reaches 280°C, the reversible fan of the cargo hold stops operating.

10. The method for ventilation and smoke exhaust in a cargo hold of a car carrier according to claim 5, characterized in that: The supply and exhaust air ducts of the reversible blower in the cargo hold serve as supply air ducts during loading and unloading conditions; serve as exhaust air ducts during navigation conditions; and serve as smoke exhaust air ducts during accident smoke exhaust conditions.

Images