Supercritical carbon dioxide phase change drainage device and underwater vehicle

Abstract

This application relates to the field of underwater vehicle technology, and discloses a supercritical carbon dioxide phase change drainage device and an underwater vehicle, comprising: a first power unit, a decompression unit, and a first decompression unit; the first power unit has a first storage chamber and a first outlet, the first storage chamber being connected to the first outlet, and the first storage chamber storing liquid carbon dioxide; the decompression unit has a decompression chamber, a first inlet, and a second outlet, both the first inlet and the second outlet being connected to the decompression chamber; the first decompression unit is sealed between the first inlet and the first outlet, and the first decompression unit is configured to open when the pressure in the first storage chamber exceeds a preset value, thereby connecting the first inlet and the first outlet. The drainage device according to this application is safe, efficient, and has a strong drainage capacity.

Description

Technical Field

[0001] This application relates to the field of underwater vehicle technology, and in particular to a supercritical carbon dioxide phase change drainage device 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 use compressed air drainage systems or high-temperature gas drainage systems. However, as the operating depth of underwater vehicles gradually increases, compressed air drainage is significantly affected by back pressure, resulting in a significant decrease in drainage capacity; high-temperature gas drainage produces gases such as carbon monoxide and hydrogen, which pose a risk of secondary combustion and are also detrimental to safety. Summary of the Invention

[0003] This application provides a supercritical carbon dioxide phase change drainage device, 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 supercritical carbon dioxide phase change drainage device, comprising: a first power unit, a pressure reducing unit, a first pressure releasing unit, a second power unit, and a second pressure releasing unit; the first power unit has a first storage chamber and a first outlet, the first storage chamber being connected to the first outlet, and the first storage chamber storing liquid carbon dioxide; the pressure reducing unit has a pressure reducing chamber, a first inlet, and a second outlet, the first inlet and the second outlet both being connected to the pressure reducing chamber; the first pressure releasing unit is sealed between the first inlet and the first outlet, and the first pressure releasing 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; the second power unit has a second storage chamber and a third outlet, the second storage chamber being connected to the third outlet, the second storage chamber storing compressed air, and the pressure reducing unit also has a second inlet; the second pressure releasing unit is sealed between the second inlet and the third outlet, and the second pressure releasing 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.

[0006] According to the supercritical carbon dioxide phase change drainage device of this application embodiment, after 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 to convert into high-pressure supercritical carbon dioxide, achieving expansion and work to drain the water. This method has strong drainage capacity, and the carbon dioxide itself is safe and reliable. The supercritical carbon dioxide phase change drainage device of this application embodiment can adjust the drainage capacity by adjusting the working time interval between each first power unit, achieving the goal of adjusting the drainage capacity according to operating conditions. The liquid carbon dioxide working fluid used in this invention has extremely low cost, can be reused after refilling, and has low maintenance and support costs.

[0007] The first power unit's storage chamber (first storage chamber) stores liquid carbon dioxide, while the second power unit's storage chamber (second storage chamber) stores compressed air. Since compressed air is less expensive than liquid carbon dioxide, storing liquid carbon dioxide in the first power unit's storage chamber and compressed air in the second power unit's storage chamber reduces the operating cost of the drainage system compared to storing liquid carbon dioxide entirely in the power unit. Furthermore, different media can be selected to drain water from the water tanks depending on the specific application scenario.

[0008] For example, in shallow water areas, 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 areas, 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0014] 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.

[0015] According to some embodiments of this application, along the first direction, the projection of the second pressure-reducing unit falls into the central region of the first pressure-reducing unit.

[0016] In the above scheme, 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.

[0017] 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.

[0018] In the above scheme, it is ensured that the high-pressure supercritical carbon dioxide discharged from each first power unit can be fully depressurized in the first depressurization unit, thereby improving the depressurization efficiency.

[0019] According to some embodiments of this application, the supercritical carbon dioxide phase change 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.

[0020] 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.

[0021] According to some embodiments of this application, the supercritical carbon dioxide phase change 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.

[0022] 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.

[0023] According to some embodiments of this application, the supercritical carbon dioxide phase change drainage device further includes a pressure sensor disposed in the first pressure reduction unit for detecting gas pressure changes within the first pressure reduction unit.

[0024] In the above scheme, the gas pressure in the first pressure reducing unit can be monitored in real time, thereby selectively activating one or more first pressure relief units to introduce gaseous carbon dioxide from one or more first power units into the first pressure reducing unit.

[0025] According to some embodiments of this application, the supercritical carbon dioxide phase change drainage device further includes an overpressure protection device, which is disposed in the first pressure reducing unit to protect the first pressure reducing unit and the second pressure reducing unit.

[0026] In the above scheme, when the carbon dioxide pressure in the first pressure reducing unit exceeds the design safety value, the overpressure protection device can automatically open and release carbon dioxide to reduce the pressure, thereby protecting the structural safety of the first and second pressure reducing units.

[0027] According to some embodiments of this application, a rectifier is provided inside the second pressure-reducing chamber.

[0028] In the above scheme, 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 with a more uniform and gentle pressure. Of course, the rectifier can also further turbulent the gaseous carbon dioxide, thereby improving the pressure reducing efficiency.

[0029] According to some embodiments of this application, the first power unit further includes an excitation element disposed in the first storage chamber. The excitation element is configured to receive external signals and generate heat so that liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide.

[0030] In the above scheme, the excitation device may include an excitation agent. The excitation device 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.

[0031] 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.

[0032] 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 the 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.

[0033] 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.

[0034] 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 needs of the water tank.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Secondly, embodiments of this application provide an underwater vehicle including the aforementioned supercritical carbon dioxide phase change drainage device. Because the underwater vehicle is equipped with the aforementioned supercritical carbon dioxide phase change drainage device, its drainage capacity is significantly improved. Attached Figure Description

[0042] 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.

[0043] Figure 1 This is a schematic diagram of a supercritical carbon dioxide phase change drainage device according to an embodiment of this application;

[0044] Figure 2 This is a schematic diagram of a pressure reduction unit according to an embodiment of this application;

[0045] Figure 3 This is a schematic diagram of a supercritical carbon dioxide phase change drainage device according to another embodiment of this application;

[0046] Figure 4 This is a cross-sectional view of the first power unit according to an embodiment of this application;

[0047] Figure 5 This is a schematic diagram of a partition plate according to an embodiment of this application;

[0048] Figure 6 This is a cross-sectional view of the first power unit according to an embodiment of this application;

[0049] Figure 7 This is a cross-sectional view of the second power unit according to an embodiment of this application.

[0050] [Explanation of Labels in the Attached Image]

[0051] 100: Supercritical carbon dioxide phase change drainage device;

[0052] 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;

[0053] 210: First pressure relief unit; 220: First pressure plate; 230: First driving element; 240: First sealing element; 201: First storage chamber; 202: First outlet;

[0054] 120: Second power unit; 121: Second peripheral wall; 122: Second top wall; 123: Second bottom wall;

[0055] 310: Second pressure relief unit; 320: Second pressure plate; 330: Second driving element; 340: Second sealing element; 301: Second storage chamber; 302: Third outlet;

[0056] 130: Pressure reducing unit; 131: First pressure reducing unit; 133: Second pressure reducing unit; 103: First inlet; 105: Second outlet; 140: Protrusion;

[0057] 150: Pressure plate;

[0058] 160: Barrier plate; 104: Second conductive channel;

[0059] 170: Pull rod;

[0060] 180: Overpressure protection device;

[0061] 190: Pressure sensor;

[0062] First direction X; second direction Y; third direction Z. Detailed Implementation

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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).

[0069] 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.

[0070] 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 draining 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 drain the internal seawater.

[0071] 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 and are also detrimental to safety.

[0072] Therefore, this application proposes a safe, efficient, and high-capacity supercritical carbon dioxide phase change drainage device 100, which can provide new protection for the navigation safety of underwater vehicles.

[0073] like Figures 1-7 As shown, the supercritical carbon dioxide phase change drainage device 100 according to an embodiment of this application may include a first power unit 110, a pressure reducing unit 130 and a first pressure releasing unit 210.

[0074] The first power unit 110 has a first storage chamber 201 and a first outlet 202. The first storage chamber 201 is connected to the first outlet 202, and the first storage chamber 201 stores liquid carbon dioxide.

[0075] 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.

[0076] The first outlet 202 is connected to the first storage chamber 201. Under certain conditions, liquid carbon dioxide can be converted into a supercritical state and discharged from the first outlet 202.

[0077] 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.

[0078] As its name suggests, the depressurization chamber in the depressurization unit 130 can depressurize the carbon dioxide discharged into the depressurization unit 130. The supercritical carbon dioxide discharged from the first storage chamber 201 has a very high pressure. The high-pressure carbon dioxide can enter the depressurization chamber through the first inlet 103, where its volume can further expand. After depressurization, the carbon dioxide can be discharged through the second outlet 105.

[0079] The first pressure relief unit 210 is sealed between the first inlet 103 and the first outlet 202. The first pressure relief unit 210 is configured to rupture when the pressure in the first storage chamber 201 is greater than a preset value, so as to connect the first inlet 103 and the first outlet 202.

[0080] Optionally, the first pressure relief unit 210 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 210 opens, thereby connecting the first inlet 103 with the first outlet 202. 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.

[0081] According to some embodiments of this application, the first pressure relief unit 210 includes a first conductive channel. When the pressure in the first storage chamber 201 is greater than a preset value, the first pressure relief unit 210 is opened, and at this time the first conductive channel connects the first inlet 103 and the first outlet 202.

[0082] As carbon dioxide is discharged from the first storage chamber 201 into the depressurization chamber, the cross-sectional area of ​​the first conductive channel gradually increases along the exhaust direction. This allows the carbon dioxide to be depressurized before entering the depressurization chamber, thus increasing its volume.

[0083] According to the supercritical carbon dioxide phase change 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.

[0084] The supercritical carbon dioxide phase change drainage device 100 of this application embodiment can adjust the 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 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 costs.

[0085] According to some embodiments of this application, such as Figure 3 As shown, the supercritical carbon dioxide phase change drainage device 100 further includes a second power unit 120, which has a second storage chamber 301 and a third outlet 302. The second storage chamber 301 is connected to the third outlet 302, and the second storage chamber 301 stores compressed air. The pressure reducing unit also has a second inlet. The supercritical carbon dioxide phase change drainage device 100 further includes a second pressure relief unit 310, which is sealed between the second inlet and the third outlet 302. The second pressure relief unit 310 is 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 and the third outlet 302.

[0086] In the above scheme, the storage chamber (first storage chamber 201) of the first power unit 110 stores liquid carbon dioxide, and the storage chamber (second storage chamber 301) of the second power unit 120 stores compressed air. Since compressed air is cheaper than liquid carbon dioxide, storing liquid carbon dioxide in the storage chamber of the first power unit 110 and compressed air in the storage chamber of the second power unit reduces the operating cost of the supercritical carbon dioxide phase change drainage device 100 compared to storing all power units in liquid carbon dioxide. Furthermore, different media can be selected to drain water from the water tank according to different application scenarios.

[0087] For example, in shallow water areas, 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 areas, liquid carbon dioxide can be used to drain the water from the tank. The first depressurization unit 210 is opened, and the liquid carbon dioxide can enter the depressurization unit through the first outlet 202 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.

[0088] In some embodiments of this application, such as Figure 6 As shown, a first pressure plate 220 may be provided inside the first power unit 110. The first pressure plate 220 is slidably disposed inside the first power unit 110 along the axis of the first power unit 110. The first pressure plate 220 can be driven by the first driving member 230, 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.

[0089] 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 202 is disposed on the first top wall 112. The first driving member 230 is disposed on the first bottom wall 113, and the driving end of the first driving member 230 is connected to the first pressure plate 220. The first pressure plate 220 and the first peripheral wall 111 are connected by a first sealing member 240.

[0090] In some embodiments of this application, such as Figure 7 As shown, 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 is located in the second power unit 120 always maintains a certain pressure, ensuring that the air can be discharged outward smoothly under its own pressure.

[0091] 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.

[0092] According to the supercritical carbon dioxide phase change drainage device 100 of the present application embodiment, the pressure reducing unit 130 includes 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.

[0093] 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.

[0094] 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 expand fully.

[0095] 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.

[0096] 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 210 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.

[0097] like Figure 5 As shown, the first decompression chamber and the second decompression chamber can be separated by a baffle plate 160, and the baffle plate 160 is provided with a second conductive channel 104 that connects the first decompression chamber and the second decompression chamber.

[0098] 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.

[0099] 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 supercritical carbon dioxide phase change 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.

[0100] 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.

[0101] 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 supercritical carbon dioxide phase change drainage device 100 to be housed in the first direction X.

[0102] 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 supercritical 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 reduction efficiency and effect of the supercritical carbon dioxide. Furthermore, it has a certain volume to allow for continuous release of carbon dioxide for a period of time, forming continuous drainage.

[0103] In some embodiments of this application, there are multiple first power units 110, arranged around a second pressure-reducing unit 133 along the circumference of the first pressure-reducing unit 131. The supercritical carbon dioxide phase change 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.

[0104] 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, thereby improving depressurization efficiency.

[0105] In some embodiments of this application, the supercritical carbon dioxide phase change 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.

[0106] 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.

[0107] 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 supercritical carbon dioxide phase change drainage device 100 more robust and stable as a whole.

[0108] 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.

[0109] 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 supercritical carbon dioxide phase change drainage device 100 more robust and stable as a whole.

[0110] According to some embodiments of this application, the supercritical carbon dioxide phase change 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.

[0111] 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.

[0112] According to some embodiments of this application, the supercritical carbon dioxide phase change drainage device 100 further includes a pressure sensor 190, which is disposed in the first pressure reduction unit 131 to detect gas pressure changes within the first pressure reduction unit 131.

[0113] Therefore, the gas pressure inside the first pressure reducing unit 131 can be monitored in real time, thereby selectively activating one or more first pressure relief units 210 to introduce gaseous carbon dioxide from one or more first power units 110 into the first pressure reducing unit 131.

[0114] According to some embodiments of this application, the supercritical carbon dioxide phase change 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.

[0115] 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.

[0116] 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 agitate the carbon dioxide, thereby improving the pressure reduction efficiency.

[0117] Choose a location, such as Figure 4As shown, a 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.

[0118] According to some embodiments of this application, the first power unit 110 further includes an excitation element disposed in the first storage chamber 201. The excitation element is configured to receive external signals and generate heat so that liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] According to some embodiments of this application, a first pressure sensor and a first temperature sensor are provided in the first storage chamber 201, and a second pressure sensor and a second temperature sensor are provided in the second storage chamber 301.

[0123] In the above scheme, the first pressure sensor can detect the pressure in the first storage chamber 201 in real time. When the pressure in the first storage chamber 201 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 201 for drainage based on the pressure. For example, when the pressure in the first storage chamber 201 is insufficient, it needs to be replaced with another first storage chamber 201, and the hydraulic carbon dioxide in the other first storage chamber 201 needs to be discharged to meet the drainage needs 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 the first storage chamber 201 may be leaking, leading to an abnormally low pressure.

[0124] The first temperature sensor can detect the temperature inside the first storage chamber 201 in real time. When the temperature inside the first storage chamber 201 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 201 is detected to be too high, the cooling system can be activated to cool the overheated first storage chamber 201 and ensure the safety of the first power unit 110.

[0125] When the pressure in the second storage chamber 301 is abnormal, it can give a warning to the driver and passengers. The control center can take emergency measures automatically based on the signal given by the second pressure sensor. Of course, 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.

[0126] 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.

[0127] For example, a first cooling water channel can be provided on the first power unit 110, which can surround the first storage chamber 201; 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 on the outside of the underwater vehicle body, that is, the first power unit 110 and the second power unit 120 are always in contact with water.

[0128] 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 202.

[0129] 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 202. 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.

[0130] For example, both the first energy recovery device and the second energy recovery device can be generators. The turbine of the generator can be located at the first inlet 103, the second inlet, or the first outlet 202. The high-speed moving medium (carbon dioxide or air) can drive the turbine to rotate, thereby moving the rotor of the generator to achieve the power generation function.

[0131] According to some embodiments of this application, the first pressure relief unit 210 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.

[0132] 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 201 per unit time; when the first valve is fully opened, the amount of carbon dioxide discharged from the first storage chamber 201 per unit time is the maximum.

[0133] 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.

[0134] This application provides an underwater vehicle including the aforementioned supercritical carbon dioxide phase change drainage device 100. Because the underwater vehicle is equipped with the supercritical carbon dioxide phase change drainage device 100, its drainage capacity is significantly improved.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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 supercritical carbon dioxide phase change drainage device, characterized in that, include: The first power unit has a first storage chamber and a first outlet, the first storage chamber being connected to the first outlet, and the first storage chamber storing liquid carbon dioxide; The pressure reduction unit has a pressure reduction chamber, a first inlet and a second outlet, both of which are connected to the pressure reduction chamber. A first pressure relief unit 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. The second power unit has a second storage chamber and a third outlet. The second storage chamber is connected to the third outlet. The second storage chamber stores compressed air. The pressure reduction unit also has a second inlet. The second pressure relief unit 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.

2. The supercritical carbon dioxide phase change drainage device according to claim 1, 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.

3. The supercritical carbon dioxide phase change drainage device according to claim 2, 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.

4. The supercritical carbon dioxide phase change drainage device according to claim 3, 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. The first direction, the second direction, and the third direction are perpendicular to each other.

5. The supercritical carbon dioxide phase change drainage device according to claim 4, characterized in that, Along the first direction, the projection of the second pressure-reducing unit falls into the central region of the first pressure-reducing unit.

6. The supercritical carbon dioxide phase change drainage device according to claim 5, 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.

7. The supercritical carbon dioxide phase change drainage device according to claim 3, characterized in that, The supercritical carbon dioxide phase change drainage device also includes a pressure plate. Along the first direction, the pressure plate is spaced apart from the first pressure reducing unit, and the first power unit and the second pressure reducing unit are sandwiched between the first pressure reducing unit and the pressure plate.

8. The supercritical carbon dioxide phase change drainage device according to claim 7, characterized in that, The supercritical carbon dioxide phase change drainage device also 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.

9. The supercritical carbon dioxide phase change drainage device according to claim 3, characterized in that, The supercritical carbon dioxide phase change drainage device also includes a pressure sensor, which is installed in the first pressure reduction unit to detect changes in gas pressure within the first pressure reduction unit.

10. The supercritical carbon dioxide phase change drainage device according to claim 3, characterized in that, The supercritical carbon dioxide phase change drainage device also includes an overpressure protection device, which is installed in the first pressure reducing unit to protect the first pressure reducing unit and the second pressure reducing unit.

11. The supercritical carbon dioxide phase change drainage device according to claim 3, characterized in that, A rectifier is installed inside the second pressure reducing chamber.

12. The supercritical carbon dioxide phase change drainage device according to claim 1, characterized in that, The first power unit further includes an excitation element disposed in the first storage chamber. The excitation element is configured to receive external signals and generate heat so that liquid carbon dioxide absorbs heat and is converted into high-pressure supercritical carbon dioxide.

13. The supercritical carbon dioxide phase change drainage device according to claim 1, 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 supercritical carbon dioxide phase change drainage device according to claim 1, 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 installed at the first outlet.

15. The supercritical carbon dioxide phase change drainage device according to claim 1, 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 relief unit, and the rotation angle of the second valve is adjustable.

16. An underwater vehicle, characterized in that, The supercritical carbon dioxide phase change drainage device includes any one of claims 1-15.

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