A method of ventilation control for a cargo hold of a ship, a system and a ship

Abstract

The application discloses a kind of ventilation control method, system and ship of ship cargo hold.Method includes: obtaining the working condition mode of ship cargo hold, working condition mode includes full load mode, empty load mode and detection mode;Based on the working condition mode of ship, the ventilation step corresponding to current working condition mode is executed;Ventilation step includes: if full load mode, then execute first ventilation step, and generate first fan adjustment instruction;If empty load mode, then execute second ventilation step, generate second fan adjustment instruction;If detection mode, then execute third ventilation step, generate third fan adjustment instruction;Based on first or second or third fan adjustment instruction, the working condition state of corresponding fan equipment is regulated.The present application can effectively improve the ventilation efficiency of ship cargo hold in the process of ventilation, and can also be adjusted according to the actual situation in ship cargo hold, so as to improve the ventilation effect and reduce energy consumption.

Description

Technical Field

[0001] This application relates to the field of marine ventilation system technology, and in particular to a ventilation control method, system and ship for a ship's cargo hold. Background Technology

[0002] Currently, vehicle exhaust fumes on passenger or cargo ro-ro ships are discharged via cargo hold fans. The ventilation volume is determined by the classification society's requirements for ventilation frequency, and the capacity and number of fans are configured accordingly. Furthermore, the fans are typically activated at maximum capacity or based on manual judgment, without considering loading conditions or having a dedicated exhaust gas detection system.

[0003] Currently, when loading vehicles, the air exchange rate in the cargo hold of ro-ro (Ro-Ro) cargo ships or passenger Ro-Ro ships is configured based on the number of passengers. The number and capacity of ventilation fans are also configured accordingly, without considering the number of vehicles loaded or exhaust fumes leaking during voyage. The number of vehicles loaded on passenger Ro-Ro ships varies depending on the route or port, and the ventilation fan configuration is generally based on the maximum load capacity. A large number of cargo hold ventilation fans are usually powered by the ship's generators, resulting in high energy consumption.

[0004] It is evident that if all the fans are turned on during the loading and unloading process of vehicles without considering the vehicle's loading status, or if they are simply turned on by manual judgment, it will inevitably lead to a large waste of the electrical energy consumed by the fans. Summary of the Invention

[0005] The purpose of this invention is to provide a ventilation control method, system, and vessel for ship cargo holds, which can solve the aforementioned problems existing in the prior art.

[0006] To achieve the above objectives, this application adopts the following technical solution: On the one hand, a ventilation control method for a ship's cargo hold is provided, which includes: The operating conditions of the ship's cargo hold are obtained, including full load mode, empty load mode and detection mode; Based on the ship's operating mode, execute the ventilation steps corresponding to the current operating mode and generate a first, second, or third fan adjustment command; The ventilation steps include: If it is the full-load mode, then the first ventilation step is executed and the first fan adjustment command is generated; If it is in no-load mode, the second ventilation step is executed, and the second fan adjustment command is generated; If the detection mode is active, a third ventilation step is performed, which includes: Acquire exhaust gas detection data from multiple detection points within the ship's cargo hold; Based on the exhaust gas detection data and the preset threshold data, if the exhaust gas detection data is higher than the threshold data, a ventilation adjustment instruction is generated. Obtain the ventilation adjustment instruction information, and generate a third fan adjustment instruction by querying the preset ventilation adjustment instruction information-fan status lookup table; Based on the first, second, or third fan adjustment command, the operating status of the corresponding fan equipment is adjusted.

[0007] Preferably, the first fan adjustment command under the first ventilation step includes: adjusting the operating status of all fan equipment in the ship's cargo hold to full power operation.

[0008] Preferably, the second fan adjustment command under the second ventilation step includes: adjusting the operating status of some of the fan equipment in the ship's cargo hold to a low-power on-state.

[0009] Preferably, multiple detection points are provided on any deck of the ship's cargo hold, and each detection point is equipped with a gas detector that can be used to detect carbon monoxide, nitrogen oxides and hydrocarbons.

[0010] Preferably, the exhaust gas detection data includes first detection data regarding carbon monoxide, second detection data regarding nitrogen oxides, and third detection data regarding hydrocarbons; and The threshold data includes a first threshold for comparing the first detection data, a second threshold for comparing the second detection data, and a third threshold for comparing the third detection data; In the three sets of comparison data mentioned above, when the detection data of any set is higher than its corresponding threshold, a third wind turbine adjustment command is generated.

[0011] Preferably, a first difference between the first detection data and the first threshold, a second difference between the second detection data and the second threshold, and a third difference between the third detection data and the third threshold are obtained; Construct a first threshold gradient table, a second threshold gradient table, and a third threshold gradient table, and obtain the position of the first difference in the first threshold gradient table, the position of the second difference in the second threshold gradient table, and the position of the third difference in the third threshold gradient table; Based on the preset gradient position-fan adjustment instruction lookup table, the corresponding third fan adjustment instruction is generated.

[0012] Preferably, the first, second, or third fan adjustment command includes information on the location of the fan to be turned on, the number of fans, and the power of the fans.

[0013] On the other hand, a ventilation control system for a ship's cargo hold that can implement any of the methods described above is also provided, comprising: The ship operating condition acquisition unit is used to acquire the actual operating condition modes of the ship's cargo hold, including three operating conditions: full load mode, empty load mode, and detection mode. The ventilation step execution unit can execute the ventilation steps corresponding to the current operating mode based on the ship's operating mode, and generate a first, second, or third fan adjustment command; The ventilation steps include: If it is the full-load mode, then the first ventilation step is executed and the first fan adjustment command is generated; If it is in no-load mode, the second ventilation step is executed, and the second fan adjustment command is generated; If the detection mode is active, a third ventilation step is performed, which includes: Acquire exhaust gas detection data from multiple detection points within the ship's cargo hold; Based on the exhaust gas detection data and the preset threshold data, if the exhaust gas detection data is higher than the threshold data, a ventilation adjustment instruction is generated. The ventilation adjustment instruction information is obtained, and a third fan adjustment instruction is generated by querying a preset detection data-fan status lookup table; The control unit is used to control the operating status of the corresponding fan equipment based on the first, second, or third fan adjustment command.

[0014] Preferably, the ship's cargo hold includes multiple ventilation zones, and at least one fan is provided in each ventilation zone; The fan is electrically connected to a control host.

[0015] On the other hand, a vessel is also provided, which includes a ventilation control system for the cargo hold as described above.

[0016] The beneficial effects of this application are as follows: 1. By deploying multiple gas detectors on each deck, full coverage of the cargo hold and simultaneous monitoring of multiple parameters are achieved, eliminating blind spots in the monitoring of single gases or localized areas. Detector data is transmitted to the control box in real time, providing a comprehensive and accurate data source for ventilation control, ensuring timely detection of exhaust gas exceeding standards, and improving monitoring reliability from the source.

[0017] 2. The modular design allows for three operating modes: full load, no load, and detection, enabling the ventilation strategy to be deeply matched with the actual load state of the ship. That is, when fully loaded, the fan operates at full power to ensure efficient exhaust; when no load, it operates at low power to reduce ineffective energy consumption; and in detection mode, it dynamically responds to changes in exhaust gas to achieve on-demand adjustment, avoiding a "one-size-fits-all" control.

[0018] 3. The quantitative method of "difference analysis + threshold gradient table" in the third ventilation step transforms the degree of exhaust gas exceeding the standard into specific fan location, quantity, and power parameters, achieving a precise correspondence between "degree of exceeding the standard and ventilation intensity", significantly improving the level of control precision, and enabling a substantial reduction in ship energy costs in the long term. Attached Figure Description

[0019] The present application will now be described in further detail with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the control architecture of a ship according to an embodiment of this application; Figure 2 This is a schematic flowchart of a ventilation control method for a ship's cargo hold according to an embodiment of this application; Figure 3 This is a detailed flowchart of step S20 in a ventilation control method for a ship's cargo hold according to an embodiment of this application. Figure 4 This is a schematic diagram of a ventilation control system for a ship's cargo hold according to an embodiment of this application.

[0020] In the picture: 11. Carbon monoxide detector; 12. Nitrogen oxide detector; 13. Hydrocarbon detector; 14. Control box; 15. Control host; 16. Programmable logic controller (PLC); 17. Frequency converter; 18. Fan; 19. Combined control panel; 100. Ship operating condition acquisition unit; 200. Ventilation procedure execution unit; 300. Control unit. Detailed Implementation

[0021] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] like Figure 1 As shown, this embodiment provides a ventilation control method for ship cargo holds. The method provided by this disclosure can effectively improve the ventilation efficiency of ship cargo holds during the ventilation process, and can also make adaptive adjustments according to the actual situation inside the ship cargo holds, thereby improving the ventilation effect and reducing energy consumption.

[0025] Specifically, the ventilation control method for ship cargo holds provided in this disclosure is applied to ships, which may be ro-ro cargo ships or ro-ro passenger ships. The ships to which this method is applied include several decks for loading vehicles, and several detection points may be installed on the decks. Gas detectors are installed at the detection points to detect the gas at the detection points and in the surrounding area.

[0026] Please see Figure 2 In one embodiment, the ship is also equipped with a control box 13 electrically connected to a gas detector, a fan 17 located in the cargo hold for ventilation, and a control host 14. The control host 14 contains a frequency converter 16 for controlling the fan, a programmable logic controller (PLC) 15, and a combined control panel 18. The fan 17 is electrically connected to the frequency converter 16, and the control host 14 is electrically connected to the PLC 15 and the combined control panel 18.

[0027] Because the vehicles being loaded emit large amounts of exhaust fumes when entering and exiting the ship's driveway, and the main components of vehicle exhaust are carbon monoxide, nitrogen oxides, and hydrocarbons, it is permissible to detect vehicle exhaust using gas detectors. For example, carbon monoxide detectors 10, nitrogen oxide detectors 11, and hydrocarbon detectors 12 can be installed at a certain height on the deck of each vehicle. These detectors are grouped together, and a certain number of detector groups are arranged on each vehicle deck according to the working range of each group, ensuring that the detectors cover the entire area of ​​the ship's deck. By installing multiple groups of gas detectors, the entire ship's deck can be covered, improving the detection effectiveness of vehicle exhaust.

[0028] The gas detector is electrically connected to the control box 13 so that the corresponding exhaust gas value detected by the gas detector can be transmitted to the control box for display. Therefore, it is possible to adjust the operating status of the corresponding fan based on the data sensed by the gas detector.

[0029] In one embodiment, the number of cargo hold fans can be configured according to the maximum number of vehicles loaded in the cargo hold, allowing for convenient control based on the required air volume. The fans are controlled by frequency converters; for example, four fans form a zone, with each fan equipped with one frequency converter. The four frequency converters form a combined control panel, uniformly controlled by the programmable logic controller (PLC) of the cargo hold fans. Simultaneously, one exhaust gas detector group corresponds to one or more fans within the combined control panel.

[0030] In actual monitoring, when a detector at a certain location detects any exhaust gas exceeding the standard, the detector issues an alarm signal. The alarm signal is sent through the control box to the controller used to regulate the fans, which then controls the activation of the fans corresponding to the current detector group that are not currently in operation, and controls the number of fans to be activated and the fan volume based on the degree of exhaust gas exceeding the standard.

[0031] For example, if only one detector alarms due to exceeding the limit, one fan can be turned on. If two detectors alarm, then both fans can be turned on.

[0032] Furthermore, based on the aforementioned vessel, the ventilation control method for the vessel's cargo hold provided in this disclosure includes at least the following steps.

[0033] First, execute step S10 to obtain the operating mode of the ship's cargo hold, which includes full load mode, empty load mode and detection mode.

[0034] Understandably, the ventilation requirements of a ship's cargo hold vary depending on its load conditions. Therefore, by acquiring the ship's operating mode, the subsequent operating status of the fans can be determined in advance, thereby improving the efficiency of fan control. By dividing the operating mode into three types—full load, no load, and exhaust gas detection—and pre-setting corresponding ventilation steps, fan control can be made more closely aligned with the actual operating conditions of the ship.

[0035] Next, step S20 is executed, which involves executing the ventilation steps corresponding to the current operating mode based on the ship's operating mode, and generating a first, second, or third fan adjustment command.

[0036] Specifically, the ventilation process includes a first ventilation step, a second ventilation step, and a third ventilation step. In practice, if the ship is in full-load mode, the first ventilation step is executed, and a first fan adjustment command is generated. If the ship is in no-load mode, the second ventilation step is executed, and a second fan adjustment command is generated.

[0037] Furthermore, the first fan adjustment command under the first ventilation step includes: adjusting the operating status of all fan equipment in the ship's cargo hold to full power operation. The second fan adjustment command under the second ventilation step includes: adjusting the operating status of some fan equipment in the ship's cargo hold to low power operation. It can be understood that when the ship is in full-load or empty-load mode, it indicates that the ship is in a controllable state, meaning that the fans can be directly activated according to the set values.

[0038] Furthermore, if the ship's operating mode is detection mode, then the third ventilation step is executed.

[0039] Understandably, when a ship is operating in detection mode, its load is uncontrollable. Simultaneously, the exhaust emissions from vehicles on board are dynamically changing. Therefore, the third ventilation step can provide adaptive ventilation based on the actual load conditions. This ensures effective ventilation while reducing energy consumption, maximizing the ship's energy utilization.

[0040] Understandably, in full-load mode, the fans operate at full power to ensure timely exhaust of exhaust gases under high loads, preventing energy waste in inefficient areas. In no-load mode, only a portion of the fans operate at low power, significantly reducing energy consumption under no-load or light-load conditions. Furthermore, the detection mode dynamically adapts to real-time changes in vehicle exhaust emissions, adjusting fan status as needed to avoid a "one-size-fits-all" approach and maximize energy utilization.

[0041] Meanwhile, the modular design of the operating modes can adapt to the full-scenario operation requirements of ships from empty to fully loaded, while also being compatible with complex operating conditions such as dynamic vehicle entry and exit. By combining preset commands with dynamic adjustments, the system can cope with both controllable states, namely fully loaded and empty states, as well as uncontrollable dynamic changes, thereby improving the ship's ventilation adaptability in diverse scenarios.

[0042] Please see Figure 3 In one embodiment, the third ventilation step includes: Acquire exhaust gas detection data from multiple detection points within the ship's cargo hold. Data from carbon monoxide, nitrogen oxide, and hydrocarbon detectors can be obtained based on gas detectors installed on the ship's deck.

[0043] To improve the actual detection effect of gases, multiple detection points can be set up on any deck of the ship's cargo hold, and each detection point is equipped with a gas detector for detecting carbon monoxide, nitrogen oxides, and hydrocarbons. The exhaust gas detection data includes first detection data for carbon monoxide, second detection data for nitrogen oxides, and third detection data for hydrocarbons. By setting up multiple detection points on each deck, and simultaneously collecting data on carbon monoxide, nitrogen oxides, and hydrocarbons at each point, real-time monitoring of the entire cargo hold and multiple parameters can be achieved, avoiding blind spots in the monitoring of single gases or localized areas.

[0044] Based on exhaust gas detection data and preset threshold data, if the exhaust gas detection data is higher than the threshold data, a ventilation adjustment instruction is generated. Specifically, the threshold data includes a first threshold for comparing with the first detection data, a second threshold for comparing with the second detection data, and a third threshold for comparing with the third detection data.

[0045] Understandably, by comparing the three types of detection data with their corresponding thresholds, it is ensured that any exceedance of any type of pollutant can be detected in a timely manner, significantly reducing the risk of missed detection and providing a comprehensive and reliable data source for ventilation control.

[0046] Furthermore, among the three sets of comparison data mentioned above, when the detection data of any set is higher than its corresponding threshold, ventilation adjustment instruction information is generated.

[0047] Specifically, during the generation of ventilation adjustment command information, it is permissible to acquire a first difference between the first detection data and a first threshold, a second difference between the second detection data and a second threshold, and a third difference between the third detection data and a third threshold. By acquiring the first, second, and third differences, the magnitude of the difference between the actual detection data and the preset threshold data can be determined, and the actual fan operation level or operating power can be determined based on the magnitude of the difference.

[0048] Furthermore, a first threshold gradient table, a second threshold gradient table, and a third threshold gradient table are constructed, and the positions of the first difference, the second difference, and the third difference in the first threshold gradient table, are obtained. Based on a preset gradient position-ventilation adjustment instruction information lookup table, corresponding ventilation adjustment instruction information is generated.

[0049] Understandably, the quantification method based on "difference analysis + threshold gradient table" calculates the difference between the detected data and the threshold, and matches the control strategy corresponding to the gradient position. This transforms the abstract degree of concentration exceeding the standard into specific fan operation and power parameters, effectively avoiding the coarse control of "running at full load as soon as the standard is exceeded," and achieving a precise match between "the degree of exceeding the standard and the ventilation intensity." For example, a small number of fans can be operated at low power when the standard is slightly exceeded, while multiple area fans can be operated at high power when the standard is severely exceeded.

[0050] Meanwhile, the structured design of the gradient table and the lookup table allows ventilation adjustment commands to be directly mapped to the location, quantity, and power information of the fans, reducing human judgment errors and improving command generation efficiency and execution accuracy.

[0051] Obtain ventilation adjustment instruction information, and generate a third fan adjustment instruction by querying the preset ventilation adjustment instruction information-fan status comparison table.

[0052] It should be noted that the first, second, or third fan adjustment command includes information on the location of the fan to be turned on, the number of fans, and the power of the fans.

[0053] Understandably, dynamically adjusting the fan operation status by varying the difference in power levels, rather than uniformly starting and stopping them, can minimize energy consumption while meeting ventilation requirements. For example, only a small number of low-power fans can be turned on when there is a slight exceedance of the limit, while the number or power of fans can be increased in a targeted manner when there is a severe exceedance, thus avoiding ineffective energy consumption and further optimizing the ship's energy allocation.

[0054] Finally, step S30 is executed to adjust the operating status of the corresponding fan equipment based on the adjustment command of the first, second, or third fan.

[0055] Please see Figure 4 Based on the above-described ventilation control method for ship cargo holds, this disclosure also provides a ventilation control system for ship cargo holds. This system can execute the through-hole control method for ship cargo holds as mentioned in the above embodiments.

[0056] Specifically, the ventilation control system for a ship's cargo hold may include a ship operating condition acquisition unit 100, a ventilation procedure execution unit 200, and a control unit 300.

[0057] The ship operating condition acquisition unit 100 is used to acquire the actual operating conditions of the ship's cargo hold, including three modes: full load, empty, and detection. The ventilation procedure execution unit 200 can execute the ventilation procedure corresponding to the current operating condition mode based on the ship's operating condition mode.

[0058] The specific ventilation steps are the same as those in the ventilation control method for ship cargo holds mentioned in the above embodiments, and will not be repeated here.

[0059] Finally, the control unit 300 is used to control the operating status of the corresponding fan equipment based on the first, second, or third fan adjustment command.

[0060] It should be noted that the ship has at least multiple ventilation zones, and each ventilation zone is equipped with at least one fan. Furthermore, these fans are electrically connected to a control unit for easy adjustment.

[0061] Understandably, this disclosure also provides a vessel including a ventilation control system for the vessel's cargo hold as mentioned in the above embodiments.

[0062] In summary, this disclosure provides a ventilation control method, system, and vessel for ship cargo holds. By deploying multiple sets of gas detectors on each deck, it achieves full coverage of the cargo hold and synchronous monitoring of multiple parameters, eliminating blind spots in the monitoring of single gases or localized areas. Detector data is transmitted to the control box in real time, providing a comprehensive and accurate data source for ventilation control, ensuring timely detection of exhaust gas exceeding standards, and improving monitoring reliability from the source.

[0063] Meanwhile, the modular design based on three operating modes—full load, no load, and detection—allows for a deep match between the ventilation strategy and the ship's actual load status. Specifically, under full load, the fans operate at full power to ensure efficient exhaust; under no load, they operate at low power to reduce ineffective energy consumption; and in detection mode, they dynamically respond to changes in exhaust gas to achieve on-demand adjustment, avoiding a "one-size-fits-all" approach to control.

[0064] The quantitative method of "difference analysis + threshold gradient table" in the third ventilation step transforms the degree of exhaust gas exceeding the standard into specific fan location, quantity, and power parameters, achieving a precise correspondence between "degree of exceeding the standard and ventilation intensity," significantly improving the level of control refinement, and enabling a substantial reduction in ship energy costs in the long term.

[0065] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0066] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0068] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A ventilation control method for a ship's cargo hold, characterized in that, include: The operating conditions of the ship's cargo hold are obtained, including full load mode, empty load mode and detection mode; Based on the ship's operating mode, execute the ventilation steps corresponding to the current operating mode and generate a first, second, or third fan adjustment command; The ventilation steps include: if it is a full-load mode, a first ventilation step is executed, and a first fan adjustment command is generated; if it is an empty-load mode, a second ventilation step is executed, and a second fan adjustment command is generated; if it is a detection mode, a third ventilation step is executed, the third ventilation step including: acquiring exhaust gas detection data from multiple detection points in the ship's cargo hold; based on the exhaust gas detection data and preset threshold data, if the exhaust gas detection data is higher than the threshold data, generating ventilation adjustment command information; acquiring the ventilation adjustment command information, and generating a third fan adjustment command by querying a preset ventilation adjustment command information-fan status lookup table; adjusting the operating status of the corresponding fan equipment based on the first, second, or third fan adjustment command; multiple detection points are set on any deck of the ship's cargo hold, and gas detectors for detecting carbon monoxide, nitrogen oxides, and hydrocarbons are set at each detection point; the exhaust gas detection data includes a first detection of carbon monoxide. The system includes: data, second detection data regarding nitrogen oxides, and third detection data regarding hydrocarbons; and threshold data including a first threshold for comparing the first detection data, a second threshold for comparing the second detection data, and a third threshold for comparing the third detection data; in the above three sets of comparison data, when the detection data of any set is higher than its corresponding threshold, a third wind turbine adjustment command is generated; a first difference between the first detection data and the first threshold, a second difference between the second detection data and the second threshold, and a third difference between the third detection data and the third threshold are obtained; a first threshold gradient table, a second threshold gradient table, and a third threshold gradient table are constructed, and the positions of the first difference, the second difference, and the third difference in the first threshold gradient table, are obtained; based on a preset gradient position-wind turbine adjustment command lookup table, a corresponding third wind turbine adjustment command is generated.

2. The ventilation control method for ship cargo holds according to claim 1, characterized in that, The first fan adjustment command under the first ventilation step includes: adjusting the operating status of all fan equipment in the ship's cargo hold to full power operation.

3. The method of claim 1, wherein, The second fan adjustment command under the second ventilation step includes: adjusting the operating status of some of the fan equipment in the ship's cargo hold to a low-power on-state.

4. The ventilation control method for ship cargo holds according to claim 1, characterized in that, The first, second, or third fan adjustment command includes information on the location of the fan to be turned on, the number of fans, and the power of the fans.

5. A ventilation control system for a cargo hold of a ship, which system can implement the method according to any one of claims 1 to 4, characterized in that include: The ship operating condition acquisition unit is used to acquire the actual operating condition modes of the ship's cargo hold, including three operating conditions: full load mode, empty load mode, and detection mode. The ventilation step execution unit can execute the ventilation steps corresponding to the current operating mode based on the ship's operating mode, and generate a first, second, or third fan adjustment command; The ventilation steps include: if it is the full-load mode, then execute the first ventilation step and generate the first fan adjustment command; if it is the no-load mode, then execute the second ventilation step and generate the second fan adjustment command; if it is the detection mode, then execute the third ventilation step, which includes: acquiring exhaust gas detection data from multiple detection points in the ship's cargo hold; based on the exhaust gas detection data and preset threshold data, if the exhaust gas detection data is higher than the threshold data, then generate ventilation adjustment command information; acquiring the ventilation adjustment command information, and generating the third fan adjustment command by querying a preset detection data-fan status lookup table; and a control unit, which is used to control the operating status of the corresponding fan equipment based on the first, second, or third fan adjustment command.

6. A ventilation control system for a cargo hold of a marine vessel according to claim 5, characterized in that, The ship's cargo hold includes multiple ventilation zones, and each ventilation zone is equipped with at least one fan; the fan is electrically connected to a control host.

7. A ship, characterized in that, This includes a ventilation control system for ship cargo holds as described in claim 5 or 6 above.

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