Ventilation system and method serving ship air lubrication system

Abstract

The invention relates to the technical field of ship air lubrication systems, in particular to a ventilation system and method serving a ship air lubrication system. The system comprises a ventilation system located between an upper deck and a lower deck of a ship, and comprises the following components: a mechanical air supply device used for heat dissipation of an ALS air compressor and ensuring that the ALS air compressor sucks air; the mechanical exhaust device is used for exhausting hot air of the ALS air compressor as soon as possible; and the air quantity balancing device is used for balancing air supply and air exhaust of the ship so as to maintain micro-positive pressure of the ship. The air supply mode and the air exhaust mode are flexibly switched according to seasons, full-speed operation in summer ensures sufficient air supply amount to remove heat, and air is exhausted in time to maintain air circulation; the energy consumption is reduced and the heat dissipation requirement of the equipment is ensured by speed-reducing operation in winter; an air supply outlet is provided with enhanced cooling, a balance ventilator is used for adjusting and maintaining micro-positive pressure, and stable operation of the ALS air compressor is guaranteed in all directions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship air lubrication system, in particular to a ventilation system and method for serving a ship air lubrication system. BACKGROUND

[0002] The ship air lubrication system (ALS) is a key energy-saving and emission-reducing device for modern green shipping. It reduces the sailing resistance by releasing high-pressure bubbles or gas films to the bottom of the ship, thereby reducing fuel consumption, improving energy efficiency, and reducing greenhouse gas emissions. The system mainly consists of four parts: first, an air supply device, which generally provides high-pressure gas by a compressor; second, a distribution network, which covers pipelines, valves, and air release units, responsible for uniformly delivering air to specific areas on the ship bottom; third, an auxiliary system, i.e., a ventilation system; fourth, a control module that monitors parameters such as sailing speed, draft depth, and room pressure using sensors to dynamically adjust gas flow for optimal drag reduction effect.

[0003] To solve the related technical problems, the industry has been continuously exploring. For example, the ventilation device structure disclosed in Chinese Patent No. CN116985986A is simple and easy to maintain. However, this solution still has shortcomings: insufficient exhaust in summer affects equipment cooling, excessive exhaust in winter increases energy consumption and makes it difficult to maintain indoor micro-positive pressure, external dust and moisture easily enter, increasing equipment wear and failure risk, affecting normal operation and service life. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a ventilation system and method for serving a ship air lubrication system. The ventilation system is adjusted according to outdoor seasonal changes, helping to save energy and reduce emissions, without complex electrical control structure, simple and practical, and reliable effect.

[0005] The technical solution adopted by the present application is as follows: A ventilation system for serving a ship air lubrication system, comprising a ventilation system located between the upper deck and the lower deck of the ship, comprising the following components: A mechanical air supply device for cooling the ALS air compressor and ensuring air intake; it includes a supply air duct, a supply air pipe, a supply air fan, and a supply air outlet connected in sequence, air enters from the supply air duct, is transported by the supply air fan through the supply air pipe, and is finally sent out from the supply air outlet; A mechanical exhaust device for quickly exhausting hot air from the ALS air compressor; it includes an exhaust air duct, an exhaust air pipe, an exhaust air fan, and an exhaust air outlet connected in sequence, hot air from the ALS air compressor enters from the exhaust air outlet, is extracted by the exhaust air fan through the exhaust air pipe, and is finally exhausted from the exhaust air duct; The air volume balancing device is used for balancing the air supply and air exhaust of a ship to maintain the slight positive pressure of the ship, and comprises a balancing air duct and a balancing air outlet connected in sequence, the size of the balancing air duct is matched according to the difference between the air supply volume of the air supply outlet and the air exhaust volume of the air exhaust outlet, and the room positive pressure is maintained by adjusting the balancing air duct in the low-temperature season, and the air supply / exhaust is carried out through the balancing air outlet.

[0006] The present technical solution is graded according to the seasonal change of the outdoor environment; in summer, the ALS air compressor has a large heat dissipation demand, the air supply fan and the air exhaust fan are operated at full speed to ensure sufficient air supply volume to remove the heat generated by the air compressor and equipment, and the air exhaust is reasonably carried out to maintain the air circulation; in the low-temperature season, the heat dissipation demand is reduced, the air supply fan and the air exhaust fan are operated at a reduced speed to reduce the energy consumption, which conforms to the energy saving and emission reduction concept; the mechanical air supply device and the air exhaust device cooperate with each other to form complete air circulation; the air supply device provides cooling air for the air compressor, and the air exhaust device timely exhausts hot air to ensure the normal operation of the equipment; the air volume balancing device matches the size of the balancing air duct to adjust the air volume, so that the air supply volume and the air exhaust volume are balanced. In the low-temperature season, the opening degree of the balancing air duct is manually adjusted to accurately control the room positive pressure, prevent excessive entry of external air, reduce heat loss, and further reduce energy consumption. The whole system has no complex electric control structure, and reliable effects are achieved in a simple and practical mechanical mode.

[0007] In addition, the ventilation system serving the air lubrication system of the ship according to the above-mentioned present application further has the following additional technical features: According to one embodiment of the present application, the mechanical air supply device comprises two air supply air ducts, two air supply fans and fourteen air supply outlets; the air supply outlets are arranged above the cooling air inlets of the ALS air compressor and avoid being directly above the electrical elements, and the room positive pressure serves as the external power for the air suction of the air compressor.

[0008] In the present technical solution, two air supply air ducts and two air supply fans are arranged, if a single device fails, the other set can still maintain a certain air supply capacity to avoid damage to the air compressor due to the interruption of air intake; the fourteen air supply outlets are dispersedly arranged to expand the air supply range and make the cooling air uniformly cover the air compressor to improve the heat dissipation effect. The air supply outlets are arranged above the cooling air inlets of the ALS air compressor to make the cooling air more accurately and efficiently enter the air compressor to strengthen the cooling effect; avoiding being directly above the electrical elements prevents the electrical elements from being damp and short-circuited due to the falling of condensed water drops or the direct blowing of air flow, and ensures the safety of the electrical system; the room positive pressure serves as the external power for the air suction of the air compressor, which ingeniously utilizes the pressure difference formed by the larger air supply volume than the air exhaust volume, does not need additional complex power devices, simplifies the system structure and reduces the cost, and can prevent the entry of external dust and moisture into the room and the air compressor by means of the positive pressure to reduce the equipment wear and failure.

[0009] According to one embodiment of the present application, the air supply fan is a double-speed fan, including a full-speed air supply mode and a reduced-speed air supply mode, wherein: The full-speed air supply mode calculates the air supply amount according to the heat removal amount of the ALS air compressor, the heat transfer amount of the maintenance structure, the heat removal amount of other electrical equipment and the air consumption amount of the ALS air compressor under the condition of maintaining the room temperature at 45 DEG C in summer; The reduced-speed air supply mode calculates the air supply amount according to the temperature rise of 32 DEG C of the upper deck under the sun irradiation, without considering the heat transfer amount of the maintenance structure, the heat removal amount of the ALS air compressor and the heat removal amount of other electrical equipment under the condition of maintaining the room temperature at 45 DEG C.

[0010] In the technical solution, the full-speed air supply mode calculates the air supply amount according to the heat removal amount of the ALS air compressor, the heat transfer amount of the maintenance structure, the heat removal amount of other electrical equipment and the air consumption amount of the ALS air compressor, which can quickly remove the excess heat, maintain the room temperature at 45 DEG C, ensure the ALS air compressor to operate in good conditions and avoid performance degradation or damage caused by high temperature; the reduced-speed air supply mode calculates the air supply amount according to the heat removal amount of the ALS air compressor and other electrical equipment and the air consumption amount of the ALS air compressor, which can ensure the normal operation of the equipment, reduce the fan speed, reduce the power consumption and achieve the energy-saving purpose.

[0011] According to one embodiment of the present application, the air exhaust fan is a double-speed fan, including a full-speed air exhaust mode and a reduced-speed air exhaust mode, wherein: the full-speed air exhaust mode is 80% of the air supply amount; and the reduced-speed air exhaust amount is 80% of the air exhaust amount, so as to realize the reasonable matching with the air supply amount and ensure the effective operation of the ventilation system.

[0012] In the technical solution, the 80% air supply amount is suitable for the high-temperature season, which can avoid the high-temperature gas into the room, maintain the indoor air quality and temperature stability and ensure the normal operation of the ALS air compressor and other equipment; and the 80% air exhaust amount is suitable for the low-temperature season, which can ensure the indoor micro-positive pressure environment, prevent the outside dust and moisture from entering, avoid the excessive air exhaust leading to the indoor heat loss too fast, reduce the energy waste and achieve the energy-saving effect.

[0013] According to one embodiment of the present application, the air supply ventilation duct and the air exhaust ventilation duct adopt the mushroom-shaped ventilation duct used by the ship.

[0014] According to one embodiment of the present application, the cross section of the air supply pipe and the air exhaust pipe is rectangular, and the cross section of the balance ventilation duct is circular, so as to meet the installation and arrangement requirements.

[0015] According to one embodiment of the present application, the balance ventilation duct is provided with an adjustable device, the opening of the balance ventilation duct is changed by manually adjusting the adjustable device when the outdoor temperature is lower in the low-temperature season, so as to adjust the ventilation amount and maintain the micro-positive pressure state of the ship room; and the indicating rod of the balance ventilation duct is provided with a scale mark.

[0016] According to one embodiment of the present application, the air supply pipe and the air exhaust pipe are made of high-quality steel material, and the pipe wall is provided with a corrosion-resistant layer; and the air supply pipe and the air exhaust pipe are connected by flange sealing.

[0017] To achieve the above object, the present application further provides a ventilation method for serving an air lubrication system of a ship.

[0018] A ventilation method for serving an air lubrication system of a ship, comprising the following steps: S1: air supply mode selection: according to the change of ambient temperature, two air supply fans are switched between full-speed air supply mode and reduced-speed air supply mode; S11, full-speed air supply mode: the air supply amount is calculated according to the heat removal amount of the ALS air compressor, the heat transfer amount of the maintenance structure, the heat removal amount of other electrical equipment and the air consumption amount of the ALS air compressor under the condition that the room temperature is maintained at 45 DEG C in summer; external air enters from two air supply ventilation cylinders, sequentially passes through the air supply pipe, is pressurized by the air supply fan, and is sent out through fourteen air supply ports; the air supply ports are arranged above the cooling air inlet of the ALS air compressor and avoid being directly above the electrical elements, so as to provide cooling air for the ALS air compressor and ensure the suction of air, and the room is under positive pressure as the external power for the suction of the air compressor; S12, reduced-speed air supply mode: the air supply amount is calculated according to the temperature rise of 32 DEG C of the upper deck under the sun irradiation in low-temperature seasons, without considering the heat transfer amount of the maintenance structure, the heat removal amount of the ALS air compressor and the heat removal amount of other electrical equipment under the condition that the room temperature is maintained at 45 DEG C; external air still enters from two air supply ventilation cylinders, is transported by the air supply fan in the reduced-speed mode through the air supply pipe, and is provided for the ALS air compressor through fourteen air supply ports; S2: air exhaust mode selection: two air exhaust fans are switched between full-speed air exhaust mode and reduced-speed air exhaust mode; S21, full-speed air supply mode: the air exhaust amount is 80% of the air supply amount; hot air generated by the ALS air compressor enters from twelve air exhaust ports, is extracted by the air exhaust fan through the air supply pipe, and is finally exhausted from two air exhaust ventilation cylinders, so as to quickly exhaust the hot air out of the ship room; S22, reduced-speed air supply mode: the reduced-speed air exhaust amount is 80% of the air exhaust amount; hot air of the ALS air compressor enters from twelve air exhaust ports, is extracted by the air exhaust fan in the reduced-speed mode through the air supply pipe, and is exhausted from two air exhaust ventilation cylinders; S3: balance ventilation cylinder adjustment: the balance ventilation cylinder and the balance air port in the air volume balance device play an auxiliary adjustment role; the size of the balance ventilation cylinder is matched according to the difference between the air supply amount and the air exhaust amount, so as to ensure that the room pressure is stably maintained in a proper range of micro-positive pressure.

[0019] This technical solution achieves a balance between precise air supply and energy saving by flexibly switching the air supply mode according to changes in ambient temperature. In high temperatures such as summer, the full-speed air supply mode is adopted, and the air supply volume is calculated based on the removal of various types of heat and the air consumption of the air compressor to ensure heat dissipation and normal operation of the equipment. In low-temperature seasons, the air supply mode is switched to the reduced-speed air supply mode to reduce the air supply volume and thus reduce energy consumption. At the same time, by switching the exhaust mode to match the air supply mode, the exhaust volume is 80% of the supply volume when the air is supplied at full speed, and the hot air is discharged in time. The exhaust volume is adjusted when the air is supplied at reduced speed to avoid excessive exhaust. In addition, the room pressure is adjusted by using a balancing ventilator, and its size is matched according to the difference between the supply and exhaust volumes to maintain a suitable micro-positive pressure. In this way, the air supply and exhaust modes cooperate with each other, and the auxiliary adjustment of the balancing ventilator can not only meet the ventilation needs of the ship's air lubrication system in different environments, ensure the stable operation of equipment such as the ALS air compressor, but also achieve the goal of energy conservation and emission reduction, and improve the overall efficiency and adaptability of the ventilation system.

[0020] Compared with the prior art, the present invention has the following beneficial effects: By flexibly switching the air supply and exhaust modes according to the season, the ALS air compressor can be operated at full speed in summer to ensure sufficient air supply to remove heat and exhaust air in time to maintain air circulation; in winter, the air supply can be operated at reduced speed to reduce energy consumption while ensuring the heat dissipation needs of the equipment; the air supply vents are arranged to enhance cooling, and the balanced ventilation duct is adjusted to maintain a slight positive pressure, thus ensuring the stable operation of the ALS air compressor in all aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a top view of the present invention.

[0022] Figure 2 yes Figure 1 AA cross-sectional view.

[0023] Figure 3 yes Figure 1 BB cross-sectional view.

[0024] In the figure: 1. Upper deck; 11. Supply ventilator; 12. Supply fan; 13. Supply air outlet; 14. Exhaust air outlet; 15. Exhaust fan; 16. Exhaust ventilator; 17. Balancing ventilator; 18. Balancing air outlet; 19. ALS air compressor; 2. Lower deck. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Example 1 likeFigures 1 to 3 As shown in the drawings, the embodiment provides a ventilation system for serving the air lubrication system of a ship, which comprises a ventilation system between the upper deck 1 and the lower deck 2 of the ship, and comprises the following components: The mechanical air supply device is used for heat dissipation of the ALS air compressor 19 and air suction of the ALS air compressor 19, and comprises a supply ventilation cylinder 11, a supply pipe, a supply fan 12 and a supply port 13 connected in sequence, air enters from the supply ventilation cylinder 11, is transported by the supply fan 12 through the supply pipe, and is finally sent out from the supply port 13; The mechanical air exhaust device is used for quickly exhausting hot air of the ALS air compressor 19, and comprises an exhaust ventilation cylinder 16, an exhaust pipe, an exhaust fan 15 and an exhaust port 14 connected in sequence, hot air of the ALS air compressor 19 enters from the exhaust port 14, is extracted by the exhaust fan 15 through the exhaust pipe, and is finally exhausted from the exhaust ventilation cylinder 16; The air volume balancing device is used for balancing the air supply and the air exhaust of the ship to maintain the slight positive pressure of the ship, and comprises a balancing ventilation cylinder 17 and a balancing air port 18 connected in sequence, the size of the balancing ventilation cylinder 17 is matched according to the difference between the air supply volume of the supply port 13 and the air exhaust volume of the exhaust port 14, and the room positive pressure is maintained by adjusting the balancing ventilation cylinder 17 in the low-temperature season, and the air supply / exhaust is performed through the balancing air port 18.

[0027] As shown in the drawings, the embodiment provides a ventilation system for serving the air lubrication system of a ship, which comprises a ventilation system between the upper deck 1 and the lower deck 2 of the ship, and comprises the following components: Figures 1 to 3 As shown in the drawings, the embodiment provides a ventilation system for serving the air lubrication system of a ship, which comprises a ventilation system between the upper deck 1 and the lower deck 2 of the ship, and comprises the following components:

[0028] In addition, the ventilation system for serving the air lubrication system of a ship according to the above embodiment of the present application has the following additional technical features: According to one embodiment of the present application, the mechanical air supply device comprises two supply ventilation cylinders 11, two supply fans 12 and fourteen supply ports 13; the supply ports 13 are arranged above the cooling air inlets of the ALS air compressor 19 and avoid being directly above the electrical elements, and the room positive pressure serves as the external power for air suction of the air compressor.

[0029] In the technical solution, two air supply ducts 11 and two air supply fans 12 are arranged, if a single device fails, the other set can still maintain a certain air supply capacity, avoiding damage to the air compressor due to air intake interruption; fourteen air supply openings 13 are arranged in a dispersed manner, which can expand the air supply range, make the cooling air uniformly cover the air compressor, and improve the heat dissipation effect. The air supply opening 13 is arranged above the cooling air inlet of the ALS air compressor 19, and the cooling air is more accurately and efficiently introduced into the air compressor by using the natural sinking and diffusion characteristics of air, thereby strengthening the cooling effect; avoiding directly above the electrical elements, which is to prevent the electrical elements from being damp and short-circuited due to condensate water dripping or airflow direct blowing, thereby ensuring the safety of the electrical system; using the pressure difference formed by the fact that the air supply amount is greater than the air exhaust amount as the external power for air suction of the air compressor, without additional complex power devices, which simplifies the system structure and reduces the cost, and also prevents external dust and moisture from entering the room and the air compressor by means of the positive pressure, thereby reducing equipment wear and failure.

[0030] According to one embodiment of the present application, the air supply fan 12 is a double-speed fan, including a full-speed air supply mode and a reduced-speed air supply mode, wherein: In the full-speed air supply mode, the air supply amount is calculated according to the heat dissipation amount of the ALS air compressor 19, the heat transfer amount of the maintenance structure, the heat dissipation amount of other electrical equipment, and the air consumption amount of the ALS air compressor 19 under the condition that the room temperature is 45℃ in summer; In the reduced-speed air supply mode, the air supply amount is calculated according to the temperature rise 32℃ of the upper deck 1 under the sun irradiation, without considering the heat transfer amount of the maintenance structure, the heat dissipation amount of the ALS air compressor 19, the heat dissipation amount of other electrical equipment, and the air consumption amount of the ALS air compressor 19 under the condition that the room temperature is 45℃.

[0031] In the full-speed air supply mode, the air supply amount is calculated according to the heat dissipation amount of the ALS air compressor 19, the heat transfer amount of the maintenance structure, the heat dissipation amount of other electrical equipment, and the air consumption amount of the ALS air compressor 19 under the condition that the room temperature is 45℃ in summer;

[0032] According to one embodiment of the present application, the air supply fan 12 is a double-speed fan, including a full-speed air supply mode and a reduced-speed air supply mode, wherein: the full-speed air supply mode is 80% of the air supply amount; and the reduced-speed air supply amount is 80% of the air exhaust amount, so as to realize reasonable matching with the air supply amount and ensure effective operation of the ventilation system.

[0033] In this technical solution, 80% of the air supply volume is suitable for high temperature seasons, which can prevent high temperature gas from entering, maintain indoor air quality and temperature stability, and ensure the normal operation of equipment such as the ALS air compressor 19; 80% of the exhaust volume is suitable for low temperature seasons, which can ensure a slightly positive pressure environment indoors, prevent external dust and moisture from entering, and avoid excessive exhaust that causes excessive heat loss indoors, thereby reducing energy waste and achieving energy-saving effects.

[0034] According to one embodiment of the present invention, the air supply ventilator 11 and the air exhaust ventilator 16 are both mushroom-shaped ventilators used in ships.

[0035] According to one embodiment of the present invention, the cross-sections of the air supply duct and the air exhaust duct are rectangular, and the cross-section of the balancing ventilation duct is circular, so as to meet the installation and layout requirements.

[0036] According to one embodiment of the present invention, an adjustable device is provided on the balancing ventilator 17. In low temperature seasons and when the outdoor temperature is even lower, the opening of the balancing ventilator 17 is changed by manually adjusting the adjustable device, thereby adjusting the ventilation volume to maintain a slightly positive pressure state in the ship's room; and scale marks are provided on the indicator rod of the balancing ventilator 17.

[0037] According to one embodiment of the present invention, the air supply pipe and the exhaust pipe are both made of high-quality steel, and the pipe walls are provided with an anti-corrosion layer; and the connection between the air supply pipe and the exhaust pipe is sealed by a flange.

[0038] To achieve the above objectives, the present invention also provides a ventilation method serving a ship's air lubrication system.

[0039] Example 2 Based on Example 1, Figures 1 to 3 As shown, this embodiment provides a ventilation method for serving a ship air lubrication system, comprising the following steps: S1: Air supply mode selection: according to the change of ambient temperature, the two air supply fans 12 are switched between full speed air supply mode and reduced speed air supply mode; S11. Full-speed air supply mode. The air supply volume is calculated based on the heat dissipation required to remove the ALS air compressor 19, heat input from the maintenance structure, heat dissipation from other electrical equipment, and the air consumption required to supply the ALS air compressor 19 while maintaining a room temperature of 45°C in summer. Outside air enters through two air supply ventilators 11, passes through the air supply ducts, is pressurized by the air supply fan 12, and is then delivered through fourteen air supply vents 13. The air supply vents 13 are arranged above the cooling air inlet of the ALS air compressor 19 and avoid being directly above electrical components. This provides cooling air for the ALS air compressor 19 and ensures that it can absorb air. At the same time, the positive room pressure acts as an external driving force for the air compressor to absorb air. S12, the air supply amount is calculated according to the heat removal amount of the ALS air compressor 19, the heat removal amount of other electrical equipment and the air consumption for providing the ALS air compressor 19 under the condition that the temperature in the room is 45 DEG C and the temperature rise of the upper deck 1 under the sun is 32 DEG C, without considering the heat transfer from the maintenance structure, and the outside air still enters from the two air supply and ventilation chimneys 11, is transported by the air supply pipe and is transported by the air supply fan 12 in the speed reduction mode, and the required air for the ALS air compressor 19 is provided through the fourteen air supply ports 13; S2: the exhaust mode selection: the two exhaust fans 15 are switched between the full-speed exhaust mode and the speed reduction exhaust mode; S21, the full-speed air supply mode, the exhaust amount is 80% of the air supply amount, the hot air generated by the ALS air compressor 19 enters from the twelve exhaust ports 14, sequentially passes through the air supply pipe, is extracted by the exhaust fan 15 and is finally exhausted from the two exhaust ventilation chimneys 16, so that the hot air is quickly exhausted from the ship room; S22, the speed reduction air supply mode, the speed reduction exhaust amount is 80% of the exhaust amount; the hot air of the ALS air compressor 19 enters from the twelve exhaust ports 14, is extracted by the exhaust fan 15 in the speed reduction mode and is exhausted from the two exhaust ventilation chimneys 16; S3: the balance ventilation chimney 17 adjustment: the balance ventilation chimney 17 and the balance air port 18 in the air volume balance device play an auxiliary adjustment role, the size of the balance ventilation chimney 17 is matched according to the difference between the air supply amount and the exhaust amount, so that the pressure in the room is stably maintained in a suitable micro-positive pressure range.

[0040] The technical scheme flexibly switches the air supply mode according to the change of the environmental temperature, realizes the balance between precise air supply and energy saving, adopts the full-speed air supply mode in summer and the like, calculates the air supply amount according to the removal of various heat and the air consumption for satisfying the air compressor, ensures the heat dissipation of the equipment and the normal operation, switches to the speed reduction air supply mode in the low-temperature season, reduces the air supply amount to reduce the energy consumption, simultaneously, the exhaust mode is switched to be matched with the air supply mode, the exhaust amount is 80% of the air supply amount in the full-speed air supply mode, the hot air is timely exhausted, the exhaust amount is adjusted in the speed reduction air supply mode, and the excessive exhaust is avoided, in addition, the balance ventilation chimney 17 is used to adjust the pressure in the room, the size of the balance ventilation chimney 17 is matched according to the difference between the air supply amount and the exhaust amount, and the suitable micro-positive pressure is maintained, so that the air supply mode and the exhaust mode are matched with each other, and the auxiliary adjustment of the balance ventilation chimney 17, the ventilation demand of the air lubrication system of the ship in different environments is met, the stable operation of the ALS air compressor and the like is ensured, the energy saving and emission reduction are realized, and the overall efficiency and adaptability of the ventilation system are improved.

[0041] The air lubrication system of the ship can be classified and adjusted according to the seasonal change of the outdoor environment, and the energy saving and emission reduction are assisted, the system does not have a complex electric control system, and is simple and practical.

[0042] Although the present application is described in detail through the preferred embodiments with reference to the attached drawings, the present application is not limited thereto. Various equivalent modifications or replacements made by those skilled in the art to the embodiments of the present application without departing from the spirit and essence of the present application shall be included in the scope of the present application. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or replacements, which shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A ventilation system serving a ship's air lubrication system, characterized in that: A ventilation system located between an upper deck (1) and a lower deck (2) of a ship comprises the following components: A mechanical air supply device is used for heat dissipation of the ALS air compressor (19) and for ensuring that the ALS air compressor (19) inhales air; the device comprises an air supply ventilator (11), an air supply pipe, an air supply fan (12), and an air supply port (13) connected in sequence; air enters from the air supply ventilator (11), passes through the air supply pipe, is transported by the air supply fan (12), and is finally delivered from the air supply port (13); A mechanical exhaust device is used to exhaust the hot air from the ALS air compressor (19) as quickly as possible; the device comprises an exhaust ventilator (16), an exhaust pipe, an exhaust fan (15), and an exhaust port (14) connected in sequence; the hot air from the ALS air compressor (19) enters from the exhaust port (14), passes through the air supply pipe, is drawn out by the exhaust fan (15), and finally is exhausted from the exhaust ventilator (16); An air volume balancing device is used for balancing the air supply and exhaust of a ship to maintain a slight positive pressure on the ship. The device comprises a balancing ventilator (17) and a balancing air outlet (18) connected in sequence. The size of the balancing ventilator (17) is matched according to the difference between the air supply volume of the air supply outlet (13) and the air exhaust volume of the air outlet (14). In low temperature seasons, the balancing ventilator (17) is adjusted to maintain a positive pressure in the room, and air supply / exhaust is performed through the balancing air outlet (18).

2. The ventilation system serving the ship's air lubrication system according to claim 1, characterized in that: The mechanical air supply device comprises two air supply ventilators (11), two air supply fans (12), and fourteen air supply ports (13); the air supply ports (13) are arranged above the cooling air inlet of the ALS air compressor (19) and avoid being directly above the electrical components, and the positive pressure of the room serves as the external power for the air suction of the air compressor.

3. The ventilation system serving the ship's air lubrication system according to claim 2, characterized in that: The air blower (12) is a dual-speed blower, including a full-speed air supply mode and a reduced-speed air supply mode, wherein: In full-speed air supply mode, the air supply volume is calculated based on the heat dissipation of the ALS air compressor (19) to maintain a room temperature of 45°C in summer, the heat input from the maintenance structure, the heat dissipation of other electrical equipment, and the air consumption of the ALS air compressor (19); In the reduced speed air supply mode, the air supply volume is calculated based on the temperature rise of 32°C caused by the upper deck (1) under the sun in the low temperature season, without considering the heat input from the maintenance structure, and the heat dissipation of the ALS air compressor (19) and other electrical equipment while maintaining the room temperature at 45°C, and the air consumption of the ALS air compressor (19).

4. The ventilation system serving the ship's air lubrication system according to claim 1, characterized in that: The exhaust fan (15) is a dual-speed fan, including a full-speed exhaust mode and a reduced-speed exhaust mode, wherein: the full-speed exhaust mode is 80% of the air supply volume; the reduced-speed exhaust volume is 80% of the exhaust volume, so as to achieve a reasonable match with the air supply volume and ensure the effective operation of the ventilation system.

5. The ventilation system serving the air lubrication system of a ship according to claim 1, characterized in that: The air supply ventilator (11) and the air exhaust ventilator (16) are both mushroom-shaped ventilators used in ships.

6. The ventilation system serving the ship's air lubrication system according to claim 1 or 5, characterized in that: The cross-sections of the air supply pipe and the air exhaust pipe are rectangular, and the cross-section of the balance ventilation duct is circular, so as to meet the installation and layout requirements.

7. The ventilation system serving the air lubrication system of a ship according to claim 1, characterized in that: The balancing ventilator (17) is provided with an adjustable device. In low-temperature seasons and when the outdoor temperature is even lower, the opening of the balancing ventilator (17) is changed by manually adjusting the adjustable device, thereby adjusting the ventilation volume to maintain a slightly positive pressure state in the ship room. A scale mark is provided on the indicator rod of the balancing ventilator (17).

8. The ventilation system serving a ship's air lubrication system according to claim 6, characterized in that: The air supply pipe and the exhaust pipe are both made of high-quality steel, and the pipe walls are provided with an anti-corrosion layer; and the connection between the air supply pipe and the exhaust pipe is sealed by a flange.

9. A ventilation method for a ship's air lubrication system, using the ventilation system for a ship's air lubrication system according to any one of claims 1 to 8, characterized in that: The steps include: S1: Air supply mode selection: according to the change of ambient temperature, the two air supply fans (12) are switched between full speed air supply mode and reduced speed air supply mode; S11, full-speed air supply mode, the air supply volume is calculated based on the heat dissipation of the ALS air compressor (19) removed, the heat input from the maintenance structure, the heat dissipation of other electrical equipment, and the air consumption provided to the ALS air compressor (19) while maintaining the room temperature at 45°C in summer; the outside air enters from the two air supply ventilators (11), passes through the air supply pipes in sequence, is pressurized by the air supply fan (12), and is then sent out through fourteen air supply ports (13); the air supply ports (13) are arranged above the cooling air inlet of the ALS air compressor (19) and avoid being directly above the electrical components, providing cooling air for the ALS air compressor (19) and ensuring that it inhales air, while the positive pressure of the room serves as the external power for the air compressor to inhale air; S12, reduced speed air supply mode, the air supply volume is calculated based on the temperature rise of 32°C caused by the upper deck (1) under the sun in the low temperature season, without considering the heat input from the maintenance structure, and maintaining the room temperature at 45°C to remove the heat dissipation of the ALS air compressor (19), the heat dissipation of other electrical equipment, and the air consumption of the ALS air compressor (19); the outside air still enters from the two air supply ventilators (11), passes through the air supply duct, and is transported by the air supply fan (12) in the reduced speed mode, and provides the required air for the ALS air compressor (19) through the fourteen air supply ports (13); S2: exhaust mode selection: switching the two exhaust fans (15) between full-speed exhaust mode and reduced-speed exhaust mode; S21, full-speed air supply mode, the exhaust volume is 80% of the supply volume, the hot air generated by the ALS air compressor (19) enters from the twelve exhaust ports (14), passes through the air supply pipe in sequence, is extracted by the exhaust fan (15), and finally discharged from the two exhaust ventilators (16), so that the hot air is discharged from the ship room as quickly as possible; S22, reduced speed air supply mode, reduced speed exhaust volume is 80% of the exhaust volume; hot air from the ALS air compressor (19) enters from the twelve exhaust ports (14), passes through the air supply duct, is extracted by the exhaust fan (15) in reduced speed mode, and is discharged from the two exhaust ventilators (16); S3: Balancing ventilator (17) adjustment: The balancing ventilator (17) and balancing air outlet (18) in the air volume balancing device play an auxiliary adjustment role. The size of the balancing ventilator (17) is matched according to the difference between the supply air volume and the exhaust air volume to ensure that the room pressure is stable in an appropriate micro-positive pressure range.

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