Built-in phase change drainage system and underwater vehicle

Abstract

The application relates to the technical field of underwater vehicles, and discloses an internal phase change drainage system and an underwater vehicle. The internal phase change drainage system comprises a drainage device, a ballast water tank and a control unit. The drainage device comprises a first power unit and a pressure reduction unit. The first power unit is internally provided with a first storage chamber for storing liquid carbon dioxide. The pressure reduction unit is internally provided with a pressure reduction chamber. The ballast water tank has a containing chamber for containing water. The containing chamber is selectively communicated with the pressure reduction chamber. The control unit is in communication connection with the first power unit. The first power unit is suitable for converting liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit. After being pressure-reduced via the pressure reduction chamber, the carbon dioxide enters the containing chamber to drain water in the containing chamber. The drainage system disclosed by the application is safe, efficient and has high drainage capacity.

Description

Built-in phase change drainage system and underwater vehicle Technical Field

[0001] This application relates to the field of underwater vehicle technology, and more particularly to a built-in phase change drainage system and an underwater vehicle. Background Technology

[0002] Currently, when underwater vehicles experience unexpected situations such as rudder jamming, water ingress, or depth loss, it is necessary to quickly expel some of the stored seawater to provide positive buoyancy and enable the underwater vehicle to safely surface. At present, medium and large-sized underwater vehicles mainly employ compressed air drainage systems or high-temperature gas drainage systems. However, as the operating depth of underwater vehicles gradually increases, compressed air drainage systems are significantly affected by back pressure, resulting in a significant decrease in drainage capacity; high-temperature gas drainage systems produce gases such as carbon monoxide and hydrogen, which pose a risk of secondary combustion and are detrimental to safety. Summary of the Invention

[0003] This application provides a built-in phase change drainage system and an underwater vehicle, which is safe, efficient, and has a strong drainage capacity.

[0004] To achieve the above objectives, the main technical solutions adopted in this application include:

[0005] In a first aspect, embodiments of this application provide a built-in phase change drainage system, comprising: a drainage device, a ballast water tank, and a control unit. The drainage device includes a first power unit and a depressurization unit. The first power unit is provided with a first storage chamber for storing liquid carbon dioxide, and the depressurization unit is provided with a depressurization chamber. The ballast water tank has a receiving chamber for containing water, and the receiving chamber is selectively connected to the depressurization chamber. The control unit is communicatively connected to the first power unit, and the first power unit is adapted to convert liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit. The carbon dioxide enters the receiving chamber after being depressurized by the depressurization chamber, so as to discharge the water in the receiving chamber.

[0006] According to the built-in phase change drainage system of this application embodiment, after liquid carbon dioxide is converted into supercritical carbon dioxide, its volume expands greatly. The liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide to achieve expansion and drainage. The drainage capacity is strong and safe and reliable.

[0007] Furthermore, the built-in phase change drainage system of this application embodiment can adjust the drainage capacity of the device by adjusting the working time interval between each first power unit, thereby achieving the goal of adjusting the drainage capacity according to the operating conditions. The liquid carbon dioxide working fluid used in this invention is inherently very low-cost, can be reused after refilling, and has low maintenance and support costs.

[0008] According to some embodiments of this application, there are multiple ballast water tanks, and the multiple ballast water tanks are spaced apart on the body of the underwater vehicle.

[0009] In the above scheme, multiple ballast tanks allow the underwater vehicle to discharge water from the tanks more stably, reducing the impact on the vehicle's attitude after drainage. At the same time, since the water in the multiple ballast tanks can be selectively discharged, the underwater vehicle can ascend at different speeds.

[0010] According to some embodiments of this application, there are multiple drainage devices, each of which corresponds to one of the multiple ballast water tanks, and the decompression chamber of each drainage device is connected to the corresponding containment chamber.

[0011] In the above scheme, each ballast water tank has a dedicated drainage device that can individually inject carbon dioxide into the ballast water tank, thereby draining the water in the ballast water tank and enabling the underwater vehicle to float.

[0012] The built-in phase change drainage system of this application embodiment has an independent drainage device for each ballast water tank to control the amount of water inside, which improves the independence of ballast water tank control.

[0013] According to some embodiments of this application, a connecting pipeline is provided between the pressure reducing unit and the ballast water tank, and a first on / off valve is provided on the connecting pipeline.

[0014] In the above scheme, the amount of gaseous carbon dioxide entering the ballast water tank from the pressure-reducing unit can be selectively controlled by opening and closing the first on / off valve. Optionally, the size of the valve opening of the first on / off valve can be adjusted to adjust the rate at which gaseous carbon dioxide enters the ballast water tank from the pressure-reducing unit. In addition, since the first on / off valve is installed on the connecting pipeline, when the first on / off valve is closed, water in the containment chamber can be prevented from entering the pressure-reducing unit. Furthermore, even if the liquid carbon dioxide in the first power unit is converted into gaseous carbon dioxide and enters the pressure-reducing unit, it will not enter the ballast water tank, thereby improving the stability of the drainage system.

[0015] According to some embodiments of this application, the first power unit further has a first outlet, the first storage chamber is connected to the first outlet, and the pressure reducing unit further has a first inlet and a second outlet, both of which are connected to the pressure reducing chamber.

[0016] The first power unit further includes a first pressure relief unit, which is sealed between the first inlet and the first outlet. The first pressure relief unit is configured to open when the pressure in the first storage chamber is greater than a preset value, so as to connect the first inlet and the first outlet.

[0017] In the above scheme, the first pressure relief unit seals the first inlet and the first outlet in the normal state to prevent liquid carbon dioxide from entering the pressure reducing chamber. When the liquid carbon dioxide in the first power unit is converted into gaseous carbon dioxide, causing the pressure in the first power unit to exceed the preset value, the first pressure relief unit opens, thereby connecting the first inlet and the first outlet, and the gaseous carbon dioxide will enter the pressure reducing unit for pressure reduction.

[0018] According to some embodiments of this application, the pressure reducing unit includes multiple sub-pressure reducing units, which are connected in sequence. Along the arrangement direction of the multiple sub-pressure reducing units, the two sub-pressure reducing units at the beginning and end are respectively provided with a first inlet and a second outlet.

[0019] In the above scheme, multiple sub-decompression chambers are connected in series, so that the high-pressure gaseous carbon dioxide discharged from the first power unit can be decompressed in one sub-decompression chamber and then further decompressed in the next sub-decompression chamber, thereby allowing the gaseous carbon dioxide to expand fully.

[0020] According to some embodiments of this application, the plurality of sub-pressure relief units include a first pressure relief unit and a second pressure relief unit, the pressure relief chamber includes a first pressure relief chamber and a second pressure relief chamber, the first pressure relief chamber is disposed in the first pressure relief unit, the second pressure relief chamber is disposed in the second pressure relief unit, the first pressure relief unit is provided with a first inlet, and the second pressure relief unit is provided with a second outlet; along a first direction, the first power unit and the second pressure relief unit are both located on the same side of the first pressure relief unit.

[0021] In the above solution, the dimensions of the drainage device in the first direction can be reduced, thus decreasing the volume of the drainage device and making it more compact. Furthermore, placing the first power unit and the second pressure-reducing unit on the same side of the first pressure-reducing unit in the first direction facilitates their fixation to the first pressure-reducing unit.

[0022] According to some embodiments of this application, the size of the first pressure-reducing unit in the first direction is smaller than the size of the first pressure-reducing unit in the second direction, and the size of the first pressure-reducing unit in the first direction is smaller than the size of the first pressure-reducing unit in the third direction. Along the first direction, the projection of the second pressure-reducing unit falls into the central region of the first pressure-reducing unit, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0023] In the above scheme, the first pressure-reducing unit is constructed as a flat structure, and the first power unit and the second pressure-reducing unit are located on the same side of the first pressure-reducing unit in the thickness direction. Simultaneously, the flat shape of the first pressure-reducing unit reduces the space occupied in the first direction, facilitating the concealment of the drainage device in that direction.

[0024] In addition, the high-pressure supercritical carbon dioxide discharged from the first power unit can be fully depressurized in the first depressurization unit before entering the second depressurization unit through the first inlet, thereby improving the depressurization efficiency and effect of the high-pressure supercritical carbon dioxide.

[0025] According to some embodiments of this application, there are multiple first power units, and the multiple first power units are arranged around the second pressure relief unit along the circumference of the first pressure relief unit.

[0026] In the above scheme, it is ensured that the high-pressure gaseous carbon dioxide discharged from each first power unit can be fully depressurized in the first depressurization unit, thereby improving the depressurization efficiency.

[0027] According to some embodiments of this application, the drainage device further includes a pressure plate, which is spaced apart from the first pressure-reducing unit along the first direction, and the first power unit and the second pressure-reducing unit are sandwiched between the first pressure-reducing unit and the pressure plate.

[0028] In the above scheme, by setting a pressure plate, the first power unit and the second pressure reducing unit can be clamped and fixed between the pressure plate and the first pressure reducing unit, thereby making the drainage device more robust and stable as a whole.

[0029] According to some embodiments of this application, the drainage device further includes a pull rod, with both ends of the pull rod connected to the first pressure-reducing unit and the pressure plate, respectively, along the first direction.

[0030] In the above scheme, the tie rod can fix the first pressure reducing unit and the pressure plate together, which improves the structural stability of the drainage device.

[0031] According to some embodiments of this application, the first power unit further includes an exciter, which is communicatively connected to the control unit. The exciter is disposed in the first storage chamber and is configured to receive signals from the control unit and generate heat so that liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide.

[0032] In the above scheme, the excitation device may include an excitation agent. The excitation device can communicate with an external control unit. After receiving the excitation signal from the control center, the excitation agent undergoes a chemical reaction, thereby generating heat, causing the liquid carbon dioxide to absorb heat and undergo a phase change to transform into high-pressure supercritical carbon dioxide.

[0033] According to some embodiments of this application, the drainage device further includes a second power unit, the second power unit having a second storage chamber and a third outlet, the second storage chamber communicating with the third outlet, and the second storage chamber storing compressed air;

[0034] The pressure-reducing unit also has a second inlet, and the drainage device further includes a second pressure-relieving unit. The second pressure-relieving unit is sealed between the second inlet and the third outlet. The second pressure-relieving unit is configured to open when the pressure in the second storage chamber is greater than a preset value, so as to connect the second inlet and the third outlet.

[0035] In the above scheme, the storage chamber in the first power unit (first storage chamber) stores liquid carbon dioxide, and the storage chamber in the second power unit (second storage chamber) stores compressed air. Since compressed air is cheaper than liquid carbon dioxide, storing both liquid carbon dioxide and compressed air in the storage chambers of the first and second power units can reduce the manufacturing cost of the drainage device. Furthermore, different media can be selected to drain water from the water tanks depending on the specific application scenario.

[0036] For example, in shallow water, compressed air can be used to drain the water from the tank. The second depressurization unit can be opened, and the compressed air can reach the depressurization unit through the third outlet and the second inlet. The compressed air expands under pressure in the depressurization unit, thus entering the tank and draining the water. This method of drainage is economical. In deep water, liquid carbon dioxide can be used to drain the water from the tank. The first depressurization unit is opened, and the liquid carbon dioxide can enter the depressurization unit through the first outlet and the first inlet. After the liquid carbon dioxide is converted into supercritical carbon dioxide, the density difference between the two is tens of times, resulting in a huge volume expansion. The liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide to achieve expansion and work for drainage, resulting in high drainage efficiency. Of course, compressed air and carbon dioxide can also be used simultaneously to drain the water from the tank, thus balancing economy and efficiency.

[0037] According to some embodiments of this application, a first pressure sensor and a first temperature sensor are disposed in the first storage chamber, and a second pressure sensor and a second temperature sensor are disposed in the second storage chamber.

[0038] In the above scheme, the first pressure sensor can detect the pressure in the first storage chamber in real time. When the pressure in the first storage chamber is abnormal, it can issue a warning to the occupants. The control center can automatically take emergency measures based on the signal from the first pressure sensor. It can also select whether to use the medium in the first storage chamber for drainage based on the pressure. For example, if the pressure in the first storage chamber is insufficient, it needs to be replaced with another first storage chamber, and the hydraulic carbon dioxide in that other first storage chamber needs to be drained to meet the drainage requirements of the water tank. When the device is not in use, if the first pressure sensor detects excessively low pressure, it can issue a warning to the occupants, indicating that a leak may have occurred in the first storage chamber, leading to an abnormal pressure drop.

[0039] The first temperature sensor can monitor the temperature inside the first storage chamber in real time. When an abnormal temperature is detected inside the first storage chamber, it can alert the occupants. The control center can automatically take emergency measures based on the signal from the first pressure sensor. For example, if the temperature inside the first storage chamber is detected to be too high, the cooling system can be activated to cool the overheated first storage chamber and ensure the safety of the first power unit.

[0040] When the pressure in the second storage chamber is abnormal, it can alert the occupants. The control center can automatically take emergency measures based on the signal given by the second pressure sensor. It can also choose whether to use the medium in the second storage chamber for drainage based on the pressure in the second storage chamber. For example, when the pressure in the second storage chamber is insufficient, it is necessary to switch to another second storage chamber and discharge the compressed air in the other second storage chamber to meet the drainage requirements of the water tank.

[0041] The second temperature sensor can monitor the temperature inside the second storage chamber in real time. When an abnormal temperature is detected inside the second storage chamber, it can alert the occupants. The control center can then automatically take emergency measures based on the signal from the second pressure sensor. For example, if the temperature inside the second storage chamber is detected to be too high, the cooling system can be activated to cool the overheated chamber and ensure the safety of the first power unit.

[0042] According to some embodiments of this application, a first energy recovery device is provided at both the first inlet and the second inlet; and / or a second energy recovery device is provided at the first outlet.

[0043] In the above scheme, since the density of liquid carbon dioxide differs by tens of times after it is converted into supercritical carbon dioxide, the volume expands significantly. As a result, carbon dioxide passes through the first inlet and compressed air passes through the second inlet at a relatively high speed. A first energy recovery device is provided at both the first and second inlets, and / or a second energy recovery device is provided at the first outlet. The energy of the high-speed carbon dioxide or air can be recovered, for example, by converting kinetic energy into electrical energy through a motor and storing it in an energy storage device for use by underwater navigation equipment.

[0044] According to some embodiments of this application, the first pressure relief unit is configured as a first valve, which is rotatably disposed on the first power unit or the pressure relief unit, and the rotation angle of the first valve is adjustable; and / or the second pressure relief unit is configured as a second valve, which is rotatably disposed on the first power unit or the pressure relief unit, and the rotation angle of the second valve is adjustable.

[0045] In the above scheme, the amount of carbon dioxide discharged can be adjusted by changing the rotation angle of the first valve. For example, the first valve can be opened only slightly, thereby reducing the amount of carbon dioxide discharged from the first storage chamber per unit time; when the first valve is fully opened, the amount of carbon dioxide discharged from the first storage chamber per unit time is the maximum.

[0046] The amount of compressed air discharged can be adjusted by changing the rotation angle of the second valve. For example, the second valve can be opened only slightly, thereby reducing the amount of air discharged from the second storage chamber per unit time; when the second valve is fully open, the amount of air discharged from the second storage chamber per unit time is the maximum.

[0047] According to some embodiments of this application, at least a portion of the outer peripheral surface of the first power unit is provided with a first anti-corrosion layer, and at least a portion of the outer peripheral surface of the second power unit is provided with a second anti-corrosion layer.

[0048] In the above scheme, the first power unit and the second power unit are located on the outside of the main body of the underwater vehicle. The first power unit and the second power unit are exposed to water. Therefore, the anti-corrosion layer is provided on the outer surface of the first power unit and the second power unit to reduce the rate at which the first power unit and the second power unit are corroded.

[0049] According to some embodiments of this application, at least a portion of the inner circumferential surface of the first storage chamber is provided with a first heat insulation layer.

[0050] In the above scheme, since an excitation element is needed in the first storage chamber to generate heat, the liquid carbon dioxide will be converted into high-pressure supercritical carbon dioxide after absorbing heat. By providing a first heat insulation layer on at least part of the inner circumferential surface of the first storage chamber, heat loss can be reduced, allowing the liquid carbon dioxide to absorb more heat and thus be converted into more high-pressure supercritical carbon dioxide.

[0051] According to some embodiments of this application, the containment chamber includes multiple independent sub-containment chambers, and supercritical carbon dioxide enters at least one of the sub-containment chambers after being depressurized by the depressurization chamber.

[0052] Therefore, supercritical carbon dioxide can be selectively introduced into different sub-containment chambers, thereby changing the attitude of the underwater vehicle and further adjusting its stability by introducing supercritical carbon dioxide into specific sub-containment chambers.

[0053] Secondly, this application also proposes an underwater vehicle, comprising: a main body and the aforementioned built-in phase change drainage system, wherein the built-in phase change drainage system includes a first ballast water tank group and a second ballast water tank group, wherein the first ballast water tank group and the second ballast water tank group are respectively disposed in the left and right regions of the main body, and both the first ballast water tank group and the second ballast water tank group include at least one ballast water tank.

[0054] According to some embodiments of this application, the first ballast water tank group includes two ballast water tanks spaced apart in the longitudinal direction, and the second ballast water tank group includes two ballast water tanks spaced apart in the longitudinal direction.

[0055] In the above scheme, the underwater vehicle can selectively discharge water from one or more ballast tanks according to the operating conditions, thereby improving the underwater vehicle's adaptability to different operating conditions and ensuring the stable operation of the underwater vehicle. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0057] Figure 1 is a schematic diagram of a drainage system according to an embodiment of this application;

[0058] Figure 2 is a schematic diagram of a drainage device according to an embodiment of this application;

[0059] Figure 3 is a schematic diagram of a pressure reduction unit according to an embodiment of this application;

[0060] Figure 4 is a schematic diagram of a drainage device according to another embodiment of this application;

[0061] Figure 5 is a cross-sectional view of the first power unit according to an embodiment of this application;

[0062] Figure 6 is a schematic diagram of the cooperation between the pressure plate and the first pressure reducing unit according to an embodiment of this application;

[0063] Figure 7 is a schematic diagram of a partition plate according to an embodiment of this application;

[0064] Figure 8 is a cross-sectional view of a first power unit according to an embodiment of this application;

[0065] Figure 9 is a cross-sectional view of the second power unit according to an embodiment of this application.

[0066] [Explanation of Labels in the Attached Image]

[0067] 200: Built-in phase change drainage system;

[0068] 210: Ballast water tank;

[0069] 220: Control unit;

[0070] 230: Connecting pipes;

[0071] 240: First on / off valve;

[0072] 100: Drainage device;

[0073] 110: First power unit; 101: First inner wall region; 102: Second inner wall region; 111: First peripheral wall; 112: First top wall; 113: First bottom wall;

[0074] 410: First pressure relief unit; 420: First pressure plate; 430: First driving element; 440: First sealing element; 401: First storage chamber; 402: First outlet;

[0075] 120: Second power unit; 121: Second peripheral wall; 122: Second top wall; 123: Second bottom wall;

[0076] 310: Second pressure relief unit; 320: Second pressure plate; 330: Second driving element; 340: Second sealing element; 301: Second storage chamber; 302: Third outlet;

[0077] 130: Pressure reducing unit; 131: First pressure reducing unit; 133: Second pressure reducing unit; 103: First inlet; 105: Second outlet; 140: Protrusion;

[0078] 150: Pressure plate;

[0079] 160: Barrier plate; 104: Second conductive channel;

[0080] 170: Pull rod; 171: Elastic element;

[0081] 180: Overpressure protection device;

[0082] 190: Pressure sensor;

[0083] First direction X; second direction Y; third direction Z. Detailed Implementation

[0084] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0085] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0086] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0087] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0088] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0089] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0090] Currently, when underwater vehicles encounter unexpected situations such as rudder jamming, water ingress, or depth loss, it is necessary to quickly discharge some of the stored seawater in a short period of time to provide positive buoyancy and enable the underwater vehicle to safely surface.

[0091] Currently, medium and large underwater vehicles mainly employ either compressed air drainage systems or high-temperature gas drainage systems. Compressed air drainage systems pre-compress and store air in high-pressure air cylinders. When needed, the valve on the pipeline connecting the air cylinder and the water tank is opened to introduce high-pressure air into the water tank, thereby discharging the internal seawater. High-temperature gas drainage systems seal solid agents in a gas generator. When needed, an electrical signal ignites the agent, causing a chemical reaction that generates high-temperature gas, which is then injected into the water tank to discharge the internal seawater.

[0092] As the operating depth of underwater vehicles gradually increases, compressed air drainage is greatly affected by back pressure, resulting in a significant decrease in drainage capacity; the carbon monoxide, hydrogen, and other gases produced by high-temperature gas drainage pose a risk of secondary combustion, which is detrimental to safety.

[0093] Therefore, this application proposes a safe, efficient, and high-capacity drainage system that can provide new protection for the navigation safety of underwater vehicles.

[0094] As shown in Figures 1-9, the built-in phase change drainage system 200 according to an embodiment of this application may include a drainage device 100, a ballast water tank 210, and a control unit 220.

[0095] The drainage device 100 includes a first power unit 110 and a pressure reducing unit 130. The first power unit 110 is provided with a first storage chamber 401 for storing liquid carbon dioxide, and the pressure reducing unit 130 is provided with a pressure reducing chamber.

[0096] The pressure-reducing chamber in the pressure-reducing unit 130 can reduce the pressure of the carbon dioxide gas discharged into the pressure-reducing unit 130. The supercritical carbon dioxide discharged from the first storage chamber 401 has a very high pressure, and the volume of the high-pressure carbon dioxide can further expand in the pressure-reducing chamber. Afterwards, the depressurized carbon dioxide can be continuously discharged from the outlet.

[0097] Ballast water tank 210 has a containment compartment for containing water, which may optionally be connected to a decompression chamber.

[0098] When supercritical carbon dioxide enters the ballast water tank 210, it can partially discharge the water inside the ballast water tank 210, thereby reducing the gravity of the underwater vehicle and improving the operational stability of the underwater vehicle.

[0099] The control unit 220 is communicatively connected to the first power unit 110. The first power unit 110 is adapted to convert liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit 220. The supercritical carbon dioxide enters the containment chamber after being depressurized by the depressurization chamber, so as to discharge the water in the containment chamber.

[0100] According to the built-in phase change drainage system 200 of this application embodiment, after liquid carbon dioxide is converted into supercritical carbon dioxide, its volume expands greatly. The liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide to achieve expansion and drainage. It has strong drainage capacity and is safe and reliable.

[0101] Furthermore, the built-in phase change drainage system 200 of this application embodiment can adjust the drainage capacity of the device by adjusting the working time interval between each first power unit 110, thereby achieving the goal of adjusting the drainage capacity according to the working conditions. The liquid carbon dioxide working fluid used in this invention is of extremely low cost, can be reused after refilling, and has low maintenance and support costs.

[0102] According to some embodiments of this application, there are multiple ballast water tanks 210, and the multiple ballast water tanks 210 are spaced apart on the body of the underwater vehicle.

[0103] Therefore, multiple ballast tanks 210 allow the underwater vehicle to discharge water from the tanks more stably. At the same time, since the water in the multiple ballast tanks 210 can be selectively discharged, the underwater vehicle can ascend at different speeds.

[0104] According to some embodiments of this application, there are multiple drainage devices 100, and each of the multiple drainage devices 100 corresponds one-to-one with a multiple of the ballast water tanks 210. The decompression chamber of each drainage device 100 is connected to the corresponding containment chamber.

[0105] Therefore, each ballast water tank 210 has a dedicated drainage device 100, which can individually inject carbon dioxide into the ballast water tank 210 to drain the water in the ballast water tank 210 and enable the underwater vehicle to float.

[0106] In addition, each ballast water tank 210 has an independent drainage device 100 to control the amount of water inside it, which improves the independence of the control of the ballast water tank 210.

[0107] For example, there can be four ballast water tanks 210. The four ballast water tanks 210 can be set at the four corners of the main body of the underwater vehicle, so that the overall attitude of the underwater vehicle can be adjusted by discharging water from different ballast water tanks 210 or drawing water into different ballast water tanks 210.

[0108] According to some embodiments of this application, a connecting pipe 230 is connected between the pressure reducing unit 130 and the ballast water tank 210, and a first on / off valve 240 is provided on the connecting pipe 230.

[0109] Therefore, the amount of supercritical carbon dioxide entering the ballast water tank 210 from the pressure reducing unit 130 can be selectively controlled by opening and closing the first on / off valve 240. Optionally, the size of the valve opening of the first on / off valve 240 can be adjusted to adjust the rate at which carbon dioxide enters the ballast water tank 210 from the pressure reducing unit 130. In addition, since the first on / off valve 240 is provided on the connecting pipe 230, even if the liquid carbon dioxide in the first power unit 110 is converted into supercritical carbon dioxide and enters the pressure reducing unit 130 when the first on / off valve 240 is closed, it will not enter the ballast water tank 210, thereby improving the safety of the built-in phase change drainage system 200.

[0110] According to some embodiments of this application, the first power unit 110 further has a first outlet 402, the first storage chamber 401 is connected to the first outlet 402, and the pressure reducing unit 130 further has a first inlet 103 and a second outlet 105, both of which are connected to the pressure reducing chamber.

[0111] The first power unit 110 also includes a first pressure relief unit 410, which is located between the first inlet 103 and the first outlet 402. The first pressure relief unit 410 is configured to open when the pressure in the first storage chamber 401 is greater than a preset value, so as to connect the first inlet 103 and the first outlet 402.

[0112] In the above scheme, the first pressure relief unit 410 seals the first inlet 103 and the first outlet 402 in the normal state to prevent liquid carbon dioxide from entering the pressure relief chamber. When the liquid carbon dioxide in the first power unit 110 is converted into supercritical carbon dioxide, the pressure in the first power unit 110 exceeds the preset value. The first pressure relief unit 410 then opens, connecting the first inlet 103 and the first outlet 402. The high-pressure supercritical carbon dioxide will then enter the pressure relief unit 130 for pressure reduction.

[0113] The drainage device 100 for an underwater vehicle according to an embodiment of this application may include a first power unit 110, a pressure reduction unit 130, and a first pressure relief unit 410.

[0114] The first power unit 110 has a first storage chamber 401 and a first outlet 402. The first storage chamber 401 is connected to the first outlet 402, and the first storage chamber 401 stores liquid carbon dioxide.

[0115] Understandably, the first power unit 110 can be constructed as a metal container of sufficient strength, which can store liquid or supercritical carbon dioxide at very high pressure.

[0116] The first outlet 402 is connected to the first storage chamber 401. Under certain conditions, liquid carbon dioxide can be converted into gas and discharged from the first outlet 402.

[0117] The pressure reducing unit 130 has a pressure reducing chamber, a first inlet 103 and a second outlet 105, both of which are connected to the pressure reducing chamber.

[0118] As its name suggests, the pressure-reducing chamber in the pressure-reducing unit 130 can reduce the pressure of carbon dioxide discharged into the pressure-reducing unit 130. The gaseous carbon dioxide discharged from the first storage chamber 401 has a very high pressure. The high-pressure carbon dioxide can enter the pressure-reducing chamber through the first inlet 103, where its volume can further expand. Afterward, the depressurized carbon dioxide can be continuously discharged through the second outlet 105.

[0119] The first pressure relief unit 410 is sealed between the first inlet 103 and the first outlet 402. The first pressure relief unit 410 is configured to rupture when the pressure in the first storage chamber 401 is greater than a preset value, so as to connect the first inlet 103 and the first outlet 402.

[0120] Optionally, the first pressure relief unit 410 can be a one-way valve, and the pressure threshold of the one-way valve is determined. When the pressure in the storage chamber is sufficiently high and exceeds the aforementioned pressure threshold, the first pressure relief unit 410 opens, thereby connecting the first inlet 103 with the first outlet 402. Thus, high-pressure supercritical carbon dioxide can enter the pressure reduction unit 130 for pressure reduction, and then be discharged from the second outlet 105.

[0121] According to the drainage device 100 of this application embodiment, after liquid carbon dioxide is converted into supercritical carbon dioxide, its volume expands greatly. The liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide to achieve expansion and work to drain water. It has strong drainage capacity and is safe and reliable.

[0122] The drainage device 100 of this application embodiment can adjust its drainage capacity by adjusting the working time interval between each first power unit 110, thereby achieving the goal of adjusting the drainage capacity according to working conditions. The liquid carbon dioxide working fluid used in this invention is of extremely low cost, can be reused after refilling, and has low maintenance costs.

[0123] According to the embodiment of this application, the drainage device 100 includes a pressure reducing unit 130 comprising a plurality of sub-pressure reducing units, which are connected in sequence. Along the arrangement direction of the plurality of sub-pressure reducing units, the two sub-pressure reducing units at the beginning and end are respectively provided with a first inlet 103 and a second outlet 105.

[0124] It is understandable that each sub-decompression unit is equipped with a sub-decompression chamber, and multiple sub-decompression chambers together form the aforementioned decompression chamber.

[0125] Multiple sub-decompression chambers are connected in series, so that the high-pressure supercritical carbon dioxide discharged from the first power unit 110 can be decompressed in one sub-decompression chamber and then further decompressed in the next sub-decompression chamber, thereby allowing the supercritical carbon dioxide to undergo sufficient decompression and expansion.

[0126] In some embodiments of this application, the multiple sub-pressure relief units include a first pressure relief unit 131 and a second pressure relief unit 133, and the pressure relief chamber includes a first pressure relief chamber and a second pressure relief chamber. The first pressure relief chamber is disposed in the first pressure relief unit 131, and the second pressure relief chamber is disposed in the second pressure relief unit 133. The first pressure relief unit 131 is provided with a first inlet 103, and the second pressure relief unit 133 is provided with a second outlet 105.

[0127] The first and second decompression chambers are connected in series, and along the flow direction of carbon dioxide, the first decompression chamber is closer to the first power unit 110 than the second decompression chamber. After the first decompression unit 410 is opened, the high-pressure supercritical carbon dioxide in the first power unit 110 will first enter the first decompression chamber for decompression, then enter the second decompression chamber for decompression, and finally be discharged from the second exhaust port.

[0128] As shown in Figure 7, the first decompression chamber and the second decompression chamber can be separated by a baffle plate 160. The baffle plate 160 is provided with a second conductive channel 104 that connects the first decompression chamber and the second decompression chamber.

[0129] Along the exhaust direction, the cross-sectional area of ​​the second conduit 104 gradually increases. This allows for pre-decompression of the carbon dioxide before it enters the second decompression chamber, further increasing the volume of the carbon dioxide.

[0130] According to some embodiments of this application, along the first direction X, the first power unit 110 and the second pressure-reducing unit 133 are both located on the same side of the first pressure-reducing unit 131. This reduces the size of the drainage device 100 in the first direction X, decreasing its volume and making it more compact. Furthermore, placing the first power unit 110 and the second pressure-reducing unit 133 on the same side of the first pressure-reducing unit 131 in the first direction X facilitates their fixation to the first pressure-reducing unit 131.

[0131] In some embodiments of this application, the size of the first pressure relief unit 131 in the first direction X is smaller than the size of the first pressure relief unit 131 in the second direction Y, and the size of the first pressure relief unit 131 in the first direction X is smaller than the size of the first pressure relief unit 131 in the third direction Z. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0132] In other words, the first pressure-reducing unit 131 is constructed as a flat structure, and the first power unit 110 and the second pressure-reducing unit 133 are disposed on the same side of the first pressure-reducing unit 131 in the thickness direction. At the same time, the flat shape of the first pressure-reducing unit 131 reduces the space occupied in the first direction X, making it easier for the drainage device 100 to be stored in the first direction X.

[0133] According to some embodiments of this application, along the first direction X, the projection of the second pressure-reducing unit 133 falls into the central region of the first pressure-reducing unit 131. Therefore, the high-pressure gaseous carbon dioxide discharged from the first power unit 110 can be sufficiently depressurized within the first pressure-reducing unit 131 before entering the second pressure-reducing unit 133 through the first inlet 103, thereby improving the pressure-reducing efficiency and effect of the high-pressure gaseous carbon dioxide.

[0134] In some embodiments of this application, there are multiple first power units 110, arranged around the second pressure-reducing unit 133 along the circumference of the first pressure-reducing unit 131. The drainage device 100 may include multiple groups of first power units, each group of first power units including multiple first power units 110, and the multiple first power units 110 are arranged sequentially along the circumference of the first pressure-reducing unit 131, and the multiple groups of first power units are arranged sequentially along the radial direction of the first pressure-reducing unit 131.

[0135] This ensures that the high-pressure supercritical carbon dioxide discharged from each first power unit 110 can be fully depressurized within the first depressurization unit 131, thus improving depressurization efficiency.

[0136] In some embodiments of this application, the drainage device 100 further includes a pressure plate 150, which is spaced apart from the first pressure reducing unit 131 along the first direction X, and the first power unit 110 and the second pressure reducing unit 133 are sandwiched between the first pressure reducing unit 131 and the pressure plate 150.

[0137] The first power unit 110 can be a cylindrical structure extending along the first direction X. Similarly, the second pressure-reducing unit 133 can also be a cylindrical structure extending along the first direction X. To facilitate the simultaneous fixing of the first power unit 110 and the second pressure-reducing unit 133, the dimensions of the first power unit 110 in the first direction X and the dimensions of the second pressure-reducing unit 133 in the first direction X are approximately the same.

[0138] By setting the pressure plate 150, the first power unit 110 and the second pressure reducing unit 133 can be clamped and fixed between the pressure plate 150 and the first pressure reducing unit 131, thereby making the drainage device 100 more robust and stable as a whole.

[0139] According to some embodiments of this application, the drainage device 100 further includes a pull rod 170, with its two ends connected to the first pressure-reducing unit 131 and the pressure plate 150 respectively along the first direction X.

[0140] The pull rod 170 can tighten the pressure plate 150 and the first pressure-reducing unit 131. The pull rod 170 can be constructed as a long bolt, with one end of the bolt head abutting against one of the first pressure-reducing unit 131 and the pressure plate 150. The bolt shank can pass through the other of the first pressure-reducing unit 131 and the pressure plate 150 and be fastened by a nut. By tightening or loosening the nut, the distance between the pressure plate 150 and the first pressure-reducing unit 131 can be changed, thereby fixing the pressure plate 150 and the first pressure-reducing unit 131, or disassembling the pressure plate 150 and the first pressure-reducing unit 131.

[0141] According to some embodiments of this application, as shown in FIG6, the drainage device further includes a plurality of elastic elements 171, each corresponding to a plurality of pull rods 170. Each elastic element 171 is sleeved on the corresponding pull rod 170. The two ends of the elastic element 171 are respectively tightened with the pressure plate 150 and the first pressure-reducing unit 131. Thus, the elastic element 171 can play a buffering role, preventing the pressure plate 150 and the first pressure-reducing unit 131 from getting too close and damaging the first pressure-reducing unit 131 and / or the second pressure-reducing unit 132. Optionally, the elastic element 171 can be a coil spring or a rubber sleeve, which is not limited here.

[0142] According to some embodiments of this application, the drainage device 100 further includes a pressure sensor 190, which is disposed in the first pressure reducing unit 131 for detecting changes in carbon dioxide pressure within the first pressure reducing unit 131.

[0143] Therefore, the carbon dioxide pressure in the first pressure reducing unit 131 can be monitored in real time, and one or more first pressure relief units 410 can be selectively activated to introduce carbon dioxide from one or more first power units 110 into the first pressure reducing unit 131.

[0144] According to some embodiments of this application, the drainage device 100 further includes an overpressure protection device 180, which is disposed in the first pressure reducing unit 131 to protect the first pressure reducing unit 131 and the second pressure reducing unit 133. As the name suggests, the overpressure protection device 180 can play a protective role, reducing the probability of damage to the first pressure reducing unit 131 and the second pressure reducing unit 133 due to excessive pressure in the first pressure reducing unit 131.

[0145] When the carbon dioxide pressure in the first pressure reducing unit 131 exceeds the designed safety value, the overpressure protection device 180 can automatically open and release carbon dioxide to reduce the pressure, thereby protecting the structural safety of the first pressure reducing unit 131 and the second pressure reducing unit 133.

[0146] In some embodiments of this application, a rectifier is provided in the second pressure-reducing chamber. The rectifier can regulate the flow of carbon dioxide in the second pressure-reducing chamber, so that the carbon dioxide can be discharged from the second outlet 105 at a relatively gentle pressure. Of course, the rectifier can also further turbulent the gaseous carbon dioxide, thereby improving the pressure reduction efficiency.

[0147] Optionally, as shown in Figure 5, the rectifier can be disposed on the inner wall of the second pressure-reducing unit 133, and the rectifier can be constructed as a protrusion 140 protruding from the inner wall of the second pressure-reducing unit 133. Along the first direction X, the inner wall of the second pressure-reducing unit 133 can be divided into multiple inner wall regions, including adjacent first inner wall regions 101 and second inner wall regions 102. The first inner wall region 101 is closer to the first pressure-reducing unit 131 than the second inner wall region 102, and the density of the protrusions 140 in the first inner wall region 101 is greater than the density of the protrusions 140 in the second inner wall region 102. That is, the number of protrusions 140 per unit area in the first inner wall region 101 is greater than the number of protrusions 140 per unit area in the second inner wall region 102. This allows for a more uniform pressure distribution of gaseous carbon dioxide.

[0148] According to some embodiments of this application, the first power unit 110 further includes an exciter, which is disposed in the first storage chamber 401. The exciter is communicatively connected to the control unit. The exciter is configured to receive signals from the control center and generate heat so that the liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide.

[0149] The excitation device may include an excitation agent and can communicate with an external control center. After receiving the excitation signal from the control center, the excitation agent undergoes a chemical reaction, thereby generating heat, causing the liquid carbon dioxide to absorb heat and undergo a phase change to transform into high-pressure supercritical carbon dioxide.

[0150] According to some embodiments of this application, as shown in FIG4, the drainage device further includes a second power unit 120, the second power unit 120 having a second storage chamber 301 and a third outlet 302, the second storage chamber 301 communicating with the third outlet 302, the second storage chamber 301 storing compressed air; the pressure reducing unit also has a second inlet, the drainage device further includes a second pressure relief unit 310, the second pressure relief unit 310 sealing between the second inlet and the third outlet 302, the second pressure relief unit 310 being configured to open when the pressure in the second storage chamber 301 is greater than a preset value, so as to connect the second inlet with the third outlet 302.

[0151] In the above scheme, the storage chamber (first storage chamber 401) in the first power unit 110 stores liquid carbon dioxide, and the storage chamber (second storage chamber 301) in the second power unit 120 stores compressed air. Since compressed air is cheaper than liquid carbon dioxide, storing liquid carbon dioxide and compressed air in the storage chambers of the first power unit 110 and the second power unit 120 respectively can reduce the operating cost of the drainage device. Furthermore, different media can be selected to drain water from the water tanks according to different usage scenarios.

[0152] For example, in shallow water, compressed air can be used to drain the water from the tank. The second depressurization unit 310 can be opened, and the compressed air can reach the depressurization unit through the third outlet 302 and the second inlet. The compressed air expands under pressure in the depressurization unit, thus entering the tank and draining the water. This method of drainage is economical. In deep water, liquid carbon dioxide can be used to drain the water from the tank. The first depressurization unit 410 is opened, and the liquid carbon dioxide can enter the depressurization unit through the first outlet 402 and the first inlet 103. After the liquid carbon dioxide is converted into supercritical carbon dioxide, the density difference between the two is tens of times, resulting in a huge volume expansion. The liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide to achieve expansion and work for drainage, resulting in high drainage efficiency. Of course, compressed air and carbon dioxide can also be used simultaneously to drain the water from the tank, thus balancing economy and efficiency.

[0153] In some embodiments of this application, as shown in FIG8, a first pressure plate 420 may be provided in the first power unit 110. The first pressure plate 420 is slidably disposed in the first power unit 110 along the axis of the first power unit 110. The first pressure plate 420 can be driven by the first driving member 430, so that when the carbon dioxide in the first power unit 110 is discharged outward, the carbon dioxide can be squeezed, so that the space where the carbon dioxide is located in the first power unit 110 always maintains a certain pressure, ensuring that the carbon dioxide can be discharged outward smoothly under its own pressure.

[0154] Furthermore, the first power unit 110 includes a first peripheral wall 111, a first top wall 112, and a first bottom wall 113. The first peripheral wall 111 is a rotating body. The first peripheral wall 111 and the first top wall 112 enclose a space for containing carbon dioxide. The first outlet 402 is disposed on the first top wall 112. The first driving member 430 is disposed on the first bottom wall 113, and the driving end of the first driving member 430 is connected to the first pressure plate 420. The first pressure plate 420 and the first peripheral wall 111 are connected by a first sealing member 440.

[0155] In some embodiments of this application, as shown in FIG9, a second pressure plate 320 may be provided inside the second power unit 120. The second pressure plate 320 is slidably disposed inside the second power unit 120 along the axis of the second power unit 120. The second pressure plate 320 can be driven by the second driving member 330, so that when the air in the second power unit 120 is discharged outward, the air can be compressed, so that the space where the air in the second power unit 120 is located always maintains a certain pressure, ensuring that the air can be discharged outward smoothly under its own pressure.

[0156] Furthermore, the second power unit 120 includes a second peripheral wall 121, a second top wall 122, and a second bottom wall 123. The second peripheral wall 121 is a rotating body. The second peripheral wall 121 and the second top wall 122 enclose a space for accommodating air. A third outlet 302 is disposed on the second top wall 122. A second driving member 330 is disposed on the second bottom wall 123, and the driving end of the second driving member 330 is connected to the second pressure plate 320. The second pressure plate 320 and the second peripheral wall 121 are connected by a second sealing member 340.

[0157] It is understood that there can be multiple second power units 120, and multiple second power units 120, multiple first power units 110 and second decompression unit 133 are all located on the same side of the first decompression unit 131.

[0158] Multiple first power units 110 and multiple second power units 120 can be clamped between the first pressure reducing unit 131 and the pressure plate 150.

[0159] Of course, it is understandable that the second power unit 120 can be a cylindrical structure extending along the first direction X, and the dimensions of the second power unit 120 in the first direction X are approximately the same as the dimensions of the first power unit 110 in the first direction X and the dimensions of the second decompression unit 133 in the first direction X.

[0160] By setting the pressure plate 150, the first power unit 110, the second power unit 120 and the second pressure reducing unit 133 can be clamped and fixed between the pressure plate 150 and the first pressure reducing unit 131, thereby making the drainage device 100 more robust and stable as a whole.

[0161] According to some embodiments of this application, a first pressure sensor and a first temperature sensor are provided in the first storage chamber 401, and a second pressure sensor and a second temperature sensor are provided in the second storage chamber 301.

[0162] In the above scheme, the first pressure sensor can detect the pressure in the first storage chamber 401 in real time. When the pressure in the first storage chamber 401 is abnormal, it can issue a warning to the occupants. The control center can automatically take emergency measures based on the signal given by the first pressure sensor. It can also select whether to use the medium in the first storage chamber 401 for drainage based on the pressure. For example, when the pressure in the first storage chamber 401 is insufficient, it needs to be replaced with another first storage chamber 401, and the hydraulic carbon dioxide in the other first storage chamber 401 needs to be drained to meet the drainage requirements of the water tank. When not in use, if the first pressure sensor detects excessively low pressure, it can issue a warning to the occupants, indicating that the first storage chamber 401 may be leaking, leading to an abnormally low pressure.

[0163] The first temperature sensor can detect the temperature inside the first storage chamber 401 in real time. When the temperature inside the first storage chamber 401 becomes abnormal, it can issue a warning to the occupants. The control center can automatically take emergency measures based on the signal given by the first pressure sensor. For example, if the temperature inside the first storage chamber 401 is detected to be too high, the cooling system can be activated to cool the overheated first storage chamber 401 and ensure the safety of the first power unit 110.

[0164] When the pressure in the second storage chamber 301 is abnormal, it can alert the occupants. The control center can automatically take emergency measures based on the signal given by the second pressure sensor. It can also choose whether to use the medium in the storage chamber for drainage based on the pressure in the second storage chamber 301. For example, when the pressure in the second storage chamber 301 is insufficient, it is necessary to switch to another second storage chamber 301 and discharge the compressed air in the other second storage chamber 301 to meet the drainage requirements of the water tank.

[0165] The second temperature sensor can monitor the temperature inside the second storage chamber 301 in real time. When an abnormal temperature is detected inside the second storage chamber 301, it can issue a warning to the occupants. The control center can automatically take emergency measures based on the signal from the second pressure sensor. For example, if the temperature inside the second storage chamber 301 is detected to be too high, the cooling system can be activated to cool the overheated second storage chamber 301 and ensure the safety of the second power unit 120.

[0166] For example, a first cooling water channel can be provided on the first power unit 110, which can surround the first storage chamber 401; or a second cooling water channel can be provided on the second power unit 120, which can surround the second storage chamber 301. Of course, the first power unit 110 and the second power unit 120 can be placed outside the main body of the underwater vehicle, that is, the first power unit 110 and the second power unit 120 are always in contact with water.

[0167] According to some embodiments of this application, a first energy recovery device is provided at both the first inlet 103 and the second inlet; and / or a second energy recovery device is provided at the first outlet 402.

[0168] In the above scheme, since the density of liquid carbon dioxide differs by tens of times after it is converted into supercritical carbon dioxide, the volume expands significantly. As a result, carbon dioxide passes through the first inlet 103 and compressed air passes through the second inlet at a relatively high speed. A first energy recovery device is provided at both the first inlet 103 and the second inlet; and / or a second energy recovery device is provided at the first outlet 402. The energy of the high-speed carbon dioxide or air can be recovered, for example, by converting kinetic energy into electrical energy through a motor and storing it in an energy storage device for use by underwater navigation equipment.

[0169] For example, both the first energy recovery device and the second energy recovery device can be generators. The turbine of the generator can be connected to the first inlet 103, the second inlet, or the first outlet 402. The high-speed moving medium (carbon dioxide or air) can drive the turbine to rotate, thereby moving the rotor of the generator to realize the power generation function.

[0170] According to some embodiments of this application, the first pressure relief unit 410 is configured as a first valve, which is rotatably disposed on the first power unit 110 or the pressure relief unit, and the rotation angle of the first valve is adjustable; and / or the second pressure relief unit 310 is configured as a second valve, which is rotatably disposed on the first power unit 110 or the pressure relief unit, and the rotation angle of the second valve is adjustable.

[0171] In the above scheme, the amount of carbon dioxide discharged can be adjusted by changing the rotation angle of the first valve. For example, the first valve can be opened only slightly, thereby reducing the amount of carbon dioxide discharged from the first storage chamber 401 per unit time; when the first valve is fully opened, the amount of carbon dioxide discharged from the first storage chamber 401 per unit time is the maximum.

[0172] The amount of compressed air discharged can be adjusted by changing the rotation angle of the second valve. For example, the second valve can be opened only slightly, thereby reducing the amount of air discharged from the second storage chamber 301 per unit time; when the second valve is fully open, the amount of air discharged from the second storage chamber 301 per unit time is the maximum.

[0173] According to some embodiments of this application, at least a portion of the outer peripheral surface of the first power unit 110 is provided with a first anti-corrosion layer, and at least a portion of the outer peripheral surface of the second power unit 120 is provided with a second anti-corrosion layer.

[0174] In the above scheme, the first power unit 110 and the second power unit 120 are located on the outside of the main body of the underwater vehicle. The first power unit 110 and the second power unit 120 are exposed to water. Therefore, by setting an anti-corrosion layer on the outer surface of the first power unit 110 and the second power unit 120, the rate at which the first power unit 110 and the second power unit 120 are corroded can be reduced.

[0175] According to some embodiments of this application, at least a portion of the inner circumferential surface of the first storage chamber 401 is provided with a first heat insulation layer.

[0176] In the above scheme, since the first storage chamber 401 needs an excitation element to generate heat, the liquid carbon dioxide will be converted into high-pressure supercritical carbon dioxide after absorbing heat. By providing a first heat insulation layer on at least part of the inner circumferential surface of the first storage chamber 401, heat loss can be reduced, allowing the liquid carbon dioxide to absorb more heat and thus be converted into more high-pressure supercritical carbon dioxide.

[0177] According to some embodiments of this application, the containment chamber includes multiple independent sub-containment chambers, and supercritical carbon dioxide enters at least one of the sub-containment chambers after being depressurized by the depressurization chamber.

[0178] Therefore, supercritical carbon dioxide can be selectively introduced into different sub-containment chambers, thereby changing the attitude of the underwater vehicle and further adjusting its stability by introducing supercritical carbon dioxide into specific sub-containment chambers.

[0179] For example, the accommodating compartment includes multiple sub-accommodating compartment groups, which are arranged sequentially along a first direction X. Each sub-accommodating compartment group includes multiple sub-accommodating compartments arranged sequentially along a second direction Y. The first direction X, the second direction Y, and the vertical direction are perpendicular to each other.

[0180] When the underwater vehicle tilts, supercritical carbon dioxide can be injected into the corner compartments to counteract the tilt and restore the underwater vehicle to a neutral, vertical position. When the underwater vehicle needs to move vertically, supercritical carbon dioxide can be injected into the central compartments.

[0181] Optionally, two adjacent sub-compartments can be selectively connected, for example, by means of on / off valves. This allows for the rapid injection of supercritical carbon dioxide into multiple different sub-compartments when needed, enabling further adjustment of the underwater vehicle's attitude by injecting supercritical carbon dioxide into different sub-compartments.

[0182] Optionally, each sub-accommodation compartment is also provided with at least one deflector plate, which is rotatably mounted on the ballast water tank. When the deflector plate is rotated to a preset angle, it provides the best flow guidance effect so that the water can be discharged at the fastest speed when the supercritical carbon dioxide discharges the water in the sub-accommodation compartment.

[0183] Specifically, the deflector can be constructed in a spiral shape, which can divide the sub-accommodation compartment into a spiral-shaped flow channel, thereby increasing the centrifugal force of the water flow and accelerating the discharge of water from the sub-accommodation compartment to the outside.

[0184] The underwater vehicle according to the embodiments of this application includes a main body and the built-in phase change drainage system 200 described above. The built-in phase change drainage system 200 includes a first ballast water tank group and a second ballast water tank group. The first ballast water tank group and the second ballast water tank group are respectively disposed in the left and right regions of the main body. Both the first ballast water tank group and the second ballast water tank group include at least one ballast water tank 210.

[0185] Since the underwater vehicle according to the embodiments of this application is equipped with the above-mentioned built-in phase change drainage system 200, the drainage capacity can be adjusted as needed to achieve the goal of adjusting the drainage capacity according to the working conditions, thereby enabling the underwater vehicle to adapt to more scenarios.

[0186] According to some embodiments of this application, the first ballast water tank group includes two ballast water tanks 210 spaced apart in the longitudinal direction, and the second ballast water tank group includes two ballast water tanks 210 spaced apart in the longitudinal direction.

[0187] Therefore, the underwater vehicle can selectively discharge water from one or more ballast tanks 210 according to the operating conditions, thereby improving the underwater vehicle's adaptability to different operating conditions and ensuring the stable operation of the underwater vehicle.

[0188] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0189] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0190] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0191] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A built-in phase change drainage system, characterized in that, include: A drainage device includes a first power unit and a pressure reducing unit. The first power unit has a first storage chamber for storing liquid carbon dioxide, and the pressure reducing unit has a pressure reducing chamber. A ballast water tank has a receiving chamber for containing water. A connecting pipe connects the pressure reducing unit to the ballast water tank, and a first on / off valve is provided on the connecting pipe. A control unit is communicatively connected to the first power unit. The first power unit is adapted to convert liquid carbon dioxide into high-pressure supercritical carbon dioxide under the control of the control unit. The supercritical carbon dioxide enters the receiving chamber after being depressurized by the pressure reducing chamber, so as to drain the water in the receiving chamber.

2. The built-in phase change drainage system according to claim 1, characterized in that, There are multiple ballast water tanks, and the multiple ballast water tanks are spaced apart on the main body of the underwater vehicle.

3. The built-in phase change drainage system according to claim 2, characterized in that, There are multiple drainage devices, and each drainage device corresponds to one of the multiple ballast water tanks. The decompression chamber of each drainage device is connected to the corresponding containment chamber.

4. The built-in phase change drainage system according to claim 1, characterized in that, The first power unit also has a first outlet, and the first storage chamber is connected to the first outlet. The pressure reducing unit also has a first inlet and a second outlet, and both the first inlet and the second outlet are connected to the pressure reducing chamber. The first power unit also includes a first pressure relief unit, which is sealed between the first inlet and the first outlet. The first pressure relief unit is configured to open when the pressure in the first storage chamber is greater than a preset value, so as to connect the first inlet and the first outlet.

5. The built-in phase change drainage system according to claim 4, characterized in that, The pressure reduction unit includes multiple sub-pressure reduction units, which are connected in sequence. Along the arrangement direction of the multiple sub-pressure reduction units, the two sub-pressure reduction units at the beginning and end are respectively provided with a first inlet and a second outlet.

6. The built-in phase change drainage system according to claim 5, characterized in that, The plurality of sub-pressure relief units include a first pressure relief unit and a second pressure relief unit, and the pressure relief chamber includes a first pressure relief chamber and a second pressure relief chamber. The first pressure relief chamber is disposed in the first pressure relief unit, and the second pressure relief chamber is disposed in the second pressure relief unit. The first pressure relief unit is provided with a first inlet, and the second pressure relief unit is provided with a second outlet. Along the first direction, the first power unit and the second pressure reduction unit are both located on the same side of the first pressure reduction unit.

7. The built-in phase change drainage system according to claim 6, characterized in that, The size of the first pressure-reducing unit in the first direction is smaller than the size of the first pressure-reducing unit in the second direction, and the size of the first pressure-reducing unit in the first direction is smaller than the size of the first pressure-reducing unit in the third direction. Along the first direction, the projection of the second pressure-reducing unit falls into the central region of the first pressure-reducing unit. The first direction, the second direction, and the third direction are perpendicular to each other.

8. The built-in phase change drainage system according to claim 7, characterized in that, There are multiple first power units, arranged around the second pressure relief unit along the circumference of the first pressure relief unit.

9. The built-in phase change drainage system according to claim 6, characterized in that, The drainage device further includes a pressure plate, which is spaced apart from the first pressure reducing unit along the first direction, and the first power unit and the second pressure reducing unit are sandwiched between the first pressure reducing unit and the pressure plate.

10. The built-in phase change drainage system according to claim 9, characterized in that, The drainage device further includes a pull rod, with both ends of the pull rod connected to the first pressure-reducing unit and the pressure plate, respectively, along the first direction.

11. The built-in phase change drainage system according to claim 4, characterized in that, The first power unit further includes an exciter, which is communicatively connected to the control unit. The exciter is disposed in the first storage chamber and is configured to receive signals from the control unit and generate heat so that liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide.

12. The built-in phase change drainage system according to claim 4, characterized in that, The drainage device further includes a second power unit, which has a second storage chamber and a third outlet. The second storage chamber is connected to the third outlet and stores compressed air. The pressure reducing unit also has a second inlet. The drainage device further includes a second pressure relief unit, which is sealed between the second inlet and the third outlet. The second pressure relief unit is configured to open when the pressure in the second storage chamber is greater than a preset value, so as to connect the second inlet and the third outlet.

13. The built-in phase change drainage system according to claim 12, characterized in that, The first storage chamber is equipped with a first pressure sensor and a first temperature sensor, and the second storage chamber is equipped with a second pressure sensor and a second temperature sensor.

14. The built-in phase change drainage system according to claim 12, characterized in that, A first energy recovery device is provided at both the first inlet and the second inlet; and / or a second energy recovery device is provided at the first outlet.

15. The built-in phase change drainage system according to claim 12, characterized in that, The first pressure relief unit is configured as a first valve, which is rotatably disposed on the first power unit or the pressure reducing unit, and the rotation angle of the first valve is adjustable; and / or the second pressure relief unit is configured as a second valve, which is rotatably disposed on the first power unit or the pressure reducing unit, and the rotation angle of the second valve is adjustable.

16. The built-in phase change drainage system according to claim 12, characterized in that, At least a portion of the outer peripheral surface of the first power unit is provided with a first anti-corrosion layer, and at least a portion of the outer peripheral surface of the second power unit is provided with a second anti-corrosion layer.

17. The built-in phase change drainage system according to claim 1, characterized in that, At least a portion of the inner circumferential surface of the first storage chamber is provided with a first heat insulation layer.

18. The built-in phase change drainage system according to claim 1, characterized in that, The containment chamber includes multiple independent sub-containment chambers, and supercritical carbon dioxide enters at least one of the sub-containment chambers after being depressurized by the depressurization chamber.

19. An underwater vehicle, characterized in that, include: main body; The built-in phase change drainage system according to any one of claims 1-18; wherein the built-in phase change drainage system includes a first ballast water tank group and a second ballast water tank group, the first ballast water tank group and the second ballast water tank group are respectively disposed in the left side region and the right side region of the main body, and both the first ballast water tank group and the second ballast water tank group include at least one ballast water tank.

20. The underwater vehicle according to claim 19, characterized in that, The first ballast water tank group includes two ballast water tanks spaced apart in the longitudinal direction, and the second ballast water tank group includes two ballast water tanks spaced apart in the longitudinal direction.

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