Energy recovery and buoyancy adjusting device based on ocean temperature difference energy

Abstract

The invention discloses an energy recycling and buoyancy adjusting device based on ocean temperature difference energy, and belongs to the technical field of ocean detection equipment. Comprising a phase change cavity with a phase change material; the energy accumulator is communicated with the phase change cavity; the pressure reduction oil cylinder is communicated with the energy accumulator, and a piston of the pressure reduction oil cylinder reciprocates up and down through high-pressure oil of the energy accumulator; the inner oil bag and the outer oil bag are communicated through the pressure reduction oil cylinder, and in the process that a piston of the pressure reduction oil cylinder reciprocates up and down, oil flow is generated between the inner oil bag and the outer oil bag, and buoyancy adjustment is achieved. Through the design of the phase change material, the energy accumulator and the pressure reduction oil cylinder, temperature difference energy between the surface layer and the deep layer of the ocean can be captured and converted into mechanical motion, and dependence on an external power source is reduced; a power generation system is further arranged in the device, the rotor moves along with the piston, magnetic field lines of the wire winding are cut, induced current is generated and charged into the energy storage battery, and the self-power-supply capacity of the device is enhanced through the dual-energy utilization mode.

Description

Technical Field

[0001] The invention belongs to the technical field of ocean detection equipment, and in particular relates to an energy recovery and buoyancy regulating device based on ocean temperature difference energy. Background Art

[0002] The ocean is a huge resource bank that has not been fully explored on Earth, containing rich energy and mineral resources. With the increasing demand for marine resource development and environmental exploration, marine exploration technology has developed significantly. Among them, ocean profile monitoring robots, as key tools, play an important role in understanding marine ecosystems and environmental changes. Such robots can collect a large amount of biological data and environmental information, providing valuable data for scientific research.

[0003] However, the operation of ocean profile monitoring robots is severely restricted by energy supply. Since traditional equipment relies on a single energy source, its service life, profile monitoring frequency and observation range are limited. In order to overcome these problems, in recent years, researchers have begun to focus on using marine renewable energy to extend the working life of underwater vehicles, especially the application of ocean thermal energy conversion (OTEC) in deep-sea observations.

[0004] Ocean temperature difference energy refers to the heat energy stored due to the temperature difference between deep seawater and surface seawater. The surface seawater is affected by the sun and has a higher temperature, while the deep seawater remains at a lower temperature. This temperature difference contains huge energy potential. Based on this, we design devices that can obtain heat energy from seawater and convert it into mechanical motion or electrical energy, so that the ocean profile monitoring robots equipped with these devices do not need to frequently replace batteries, can achieve long-term operation, and can monitor the ocean profile through their own up and down movements.

[0005] Traditional ocean observers rely on a single energy source, which results in a limited service life. For observers that use power generation units, the common practice is to increase the size of the heat engine capture to increase the amount of temperature difference energy obtained. However, this method has many shortcomings: the heat exchange material used is inefficient, resulting in increased equipment weight and prolonged heat exchange time; the energy conversion process is not efficient, making it difficult to achieve efficient energy recovery.

[0006] In addition, the buoyancy adjustment system and the energy recovery and power generation system are usually designed as two independent systems, each with independent components and structures. For example, the energy recovery system includes components such as heat exchangers and generators, while the buoyancy adjustment system requires air bags or hydraulic systems. This separate design increases the size and weight of the device. Summary of the invention

[0007] The present invention aims at the above-mentioned problems existing in the prior art and proposes an energy recovery and buoyancy regulation device based on ocean temperature difference energy with energy recovery and buoyancy regulation functions.

[0008] The present invention can be achieved through the following technical solutions: An energy recovery and buoyancy regulating device based on ocean temperature difference energy, comprising: a phase change cavity having a phase change material therein; an accumulator, which is in communication with the phase change chamber; A pressure reducing oil cylinder is connected to the accumulator, and the high-pressure oil of the accumulator causes the piston of the pressure reducing oil cylinder to reciprocate up and down; The inner oil bag and the outer oil bag are connected through the pressure reducing oil cylinder. When the piston of the pressure reducing oil cylinder reciprocates up and down, oil flows between the inner oil bag and the outer oil bag to achieve buoyancy adjustment.

[0009] As a further improvement of the present invention, a power generation system is also included, which includes: A mover, which is arranged on the piston; An electric wire winding is arranged outside the pressure reducing oil cylinder, and as the piston reciprocates up and down, the mover cuts the electric wire winding and generates electric current; The energy storage battery is connected to the wire winding via a rectifier. The current generated by the mover cutting the wire winding passes through the rectifier and is then charged into the energy storage battery.

[0010] As a further improvement of the present invention, the pressure reducing oil cylinder has a small oil chamber and a large oil chamber, and the piston located in the small oil chamber has an annular groove on its circumferential surface.

[0011] As a further improvement of the present invention, a first reversing valve is provided between the accumulator and the pressure reducing cylinder, the accumulator and the annular groove are communicated through a first pipeline, and the annular groove and the first reversing valve are communicated through a second pipeline.

[0012] As a further improvement of the present invention, a third pipeline is provided between the first reversing valve and the bottom of the small oil chamber, and the third pipeline is communicated with the inner oil bag.

[0013] As a further improvement of the present invention, during the process in which the high-pressure oil of the accumulator is injected into the pressure reducing cylinder and causes the piston to reciprocate up and down, the piston has a top position and a bottom position, wherein: When the piston is at the top position, the high-pressure oil of the accumulator flows into the top of the small oil chamber after passing through the first reversing valve and pushes the piston downward, and at the same time, part of the high-pressure oil of the accumulator flows into the first reversing valve after passing through the first pipeline, the annular groove, and the second pipeline in sequence and pushes it to reversal; When the piston moves to the bottom position, the first reversing valve completes the reversal, and the high-pressure oil of the accumulator flows into the bottom of the small oil chamber through the first reversing valve and pushes the piston to move upward. At this time, the oil at the top of the small oil chamber passes through the first reversing valve, and then passes through the third pipeline, the annular groove, and the second pipeline in sequence, and then flows into the first reversing valve and pushes it to reversal.

[0014] As a further improvement of the present invention, it further comprises a second reversing valve, and the inner oil bag, the outer oil bag and the bottom of the large oil chamber are connected through the second reversing valve.

[0015] As a further improvement of the present invention, an oil inlet pipeline and an oil outlet pipeline are provided between the second reversing valve and the bottom of the large oil chamber, and a first one-way valve and a second one-way valve are provided on the oil inlet pipeline and the oil outlet pipeline respectively.

[0016] As a further improvement of the present invention, during the sinking process, as the piston reciprocates up and down, the oil in the outer oil bag is sucked into the large oil chamber through the second reversing valve and the oil inlet pipeline, and the oil in the large oil chamber is injected into the inner oil bag through the oil outlet pipeline and the second reversing valve in turn.

[0017] As a further improvement of the present invention, during the floating process, as the piston reciprocates up and down, the oil in the inner oil bag is sucked into the large oil chamber through the second reversing valve and the oil inlet pipeline in turn, and the oil in the large oil chamber is injected into the outer oil bag through the oil outlet pipeline and the second reversing valve in turn.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. Efficient energy recovery and utilization: Through the design of phase change materials, accumulators and pressure relief cylinders, the device can efficiently capture the temperature difference energy between the ocean surface and deep water and convert it into mechanical movement, reducing dependence on external power sources, allowing the device to operate for a long time without replacing batteries; 2. Self-powered capability: The addition of the power generation system enables the device to not only obtain mechanical energy from the ocean temperature difference for buoyancy adjustment, but also further convert this mechanical energy into electrical energy for storage. This dual energy utilization method greatly enhances the device's self-powered capability and reduces dependence on external power sources; 3. Energy-saving buoyancy adjustment: The high-pressure oil generated by the accumulator can be pumped into the external oil bag through the pressure reducing cylinder to pump multiple times the low-pressure oil flow, and store the excess energy into the energy storage battery, which plays a role in energy saving; 4. Extended working time and coverage: Due to the realization of efficient energy recovery, the working time of the equipment is significantly extended, and it can perform tasks for longer periods of time without frequent maintenance. At the same time, the larger range of activities allows the equipment to cover a wider monitoring area and obtain richer and more diverse data, providing strong support for scientific research; 5. Improve system reliability and safety: Through the rational design of small and large oil chamber structures and the use of reversing valves, the device performs well in pressure control, reduces the risk of mechanical damage caused by extreme pressure changes, and improves the operational safety and reliability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the device of the present invention when it is on the sea surface; Figure 2 is a schematic diagram of the device of the present invention during the sinking process; Figure 3 is a schematic diagram of the device of the present invention when it is on the seabed; Figure 4 It is a schematic diagram of the device of the present invention during the floating process; Figure 5 It is a schematic diagram of the piston in the pressure reducing oil cylinder of the present invention when it reciprocates up and down.

[0020] In the figure, 100, phase change chamber; 101, fourth one-way valve; 110, accumulator; 111, first pipeline; 112, safety valve; 113, third reversing valve; 114, first pressure sensor; 120, pressure reducing cylinder; 121, piston; 1211, annular groove; 122, small oil chamber; 123, large oil chamber; 130, inner oil bag; 131, third one-way valve; 132, fifth reversing valve; 140, external oil bag; 141, fourth reversing valve; 142, second pressure sensor; 150, mover; 151, wire winding; 152, energy storage battery; 153, rectifier; 154, control module; 160, first reversing valve; 161, second pipeline; 162, third pipeline; 170, second reversing valve; 171, oil inlet pipeline; 1711, first one-way valve; 172, oil outlet pipeline; 1721, second one-way valve. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figure 1-Figure 5 As shown, the present invention provides an energy recovery and buoyancy adjustment device based on ocean temperature difference energy, comprising: The phase change cavity 100 has a phase change material therein, which can absorb or release heat within a specific temperature range to undergo a phase change; An accumulator 110 , which is in communication with the phase change chamber 100 and is used to store hydraulic energy converted from the phase change material; The pressure reducing oil cylinder 120 is connected to the accumulator 110, and the high-pressure oil in the accumulator 110 causes the piston 121 of the pressure reducing oil cylinder 120 to reciprocate up and down; The inner oil bag 130 and the outer oil bag 140 are connected via the pressure reducing oil cylinder 120. When the piston 121 of the pressure reducing oil cylinder 120 reciprocates up and down, oil flows between the inner oil bag 130 and the outer oil bag 140 to achieve buoyancy adjustment.

[0023] That is, the device achieves buoyancy adjustment through the oil transfer mechanism between the inner oil bag and the outer oil bag. When the equipment needs to sink, the pressure reducing cylinder presses the oil in the outer oil bag into the inner oil bag, reducing the overall volume of the equipment and thus reducing the buoyancy; conversely, during the floating process, the oil in the inner oil bag is pressed into the outer oil bag, increasing the volume of the equipment and improving the buoyancy.

[0024] Through the design of buoyancy adjustment, the buoyancy state of the equipment can be accurately adjusted, so that the equipment can work stably at different depths and adapt to the needs of various monitoring tasks. It also uses the natural temperature difference of the ocean as a power source, thereby saving precious battery resources and extending the working time of the equipment.

[0025] Longer working time and larger activity range allow the equipment to cover a wider monitoring area and obtain richer and more diverse data, providing strong support for scientific research.

[0026] Specifically, the device has the following stages: 1. Located on the sea surface: Due to the influence of high temperature, the phase change material in the phase change cavity 100 absorbs heat and expands, squeezing the oil into the accumulator 110 to complete the energy storage process; 2. Sinking process: When the equipment starts to sink, the accumulator 110 works, the pressure reducing oil cylinder 120 starts, and the oil in the outer oil bag 140 is pressed into the inner oil bag 130 by continuous action. This process reduces the overall volume of the equipment and reduces the buoyancy, ensuring that the equipment can sink smoothly; 3. After sinking to the seabed: Due to the low seabed water temperature, the phase change material in the phase change cavity 100 cools and contracts, generating a negative pressure effect, automatically sucking the oil in the inner oil bag 130 into the phase change cavity 100, preparing for the next round of energy recovery; 4. Floating process: When preparing to float, the accumulator 110 is opened again, and the decompression cylinder 120 continues to operate, this time to press the oil in the inner oil bag 130 into the outer oil bag 140. The increased volume of the outer oil bag 140 increases the buoyancy, helping the equipment to float back to the water surface smoothly.

[0027] That is to say, the buoyancy adjustment mechanism in this embodiment adjusts the buoyancy state of the equipment by transferring oil between the inner oil bag 130 and the outer oil bag 140. It is worth mentioning here that there is only one inner oil bag 130 and one outer oil bag 140, and the sinking and floating of the equipment can be achieved only by transferring oil between the two oil bags. This simple design scheme not only greatly simplifies the complexity of the hydraulic system, but also effectively reduces the weight and volume of the overall equipment, reduces unnecessary energy consumption, and indirectly extends the service life of the equipment.

[0028] In addition, the pressure of the inner oil bag 130 is lower, and the lower pressure helps to reduce the resistance of the oil during the transfer process, allowing the oil to flow more smoothly between the inner oil bag 130 and the outer oil bag 140. This ensures that the equipment can quickly adjust the buoyancy state as needed, and can respond quickly whether it is sinking or floating.

[0029] When the device is located on the sea surface, in order to ensure that the accumulator 110 can be filled with oil, a first pressure sensor 114 is also provided, and the first pressure sensor 114 is used to detect the pressure of the accumulator 110 in real time; Specifically, when the phase change material in the phase change chamber 100 expands due to high temperature, the oil is squeezed into the accumulator 110. When the internal pressure increases to a preset threshold, the third reversing valve 113 is energized and triggered, the oil circuit is opened, and the pressure reducing cylinder 120 starts to work. By accurately monitoring the pressure in the accumulator 110, it is ensured that the accumulator 110 is always in the best working state.

[0030] In order to prevent the oil pressure in the oil circuit from being too high, a safety valve 112 is provided to protect the oil circuit. The threshold of the safety valve 112 is higher than the threshold of the accumulator 110, and the oil overflows to the inner oil bag 130 through the safety valve 112, thereby ensuring the safety of the hydraulic system.

[0031] In addition, when the device sinks to the seabed, in order to accurately obtain the current depth of the device, a second pressure sensor 142 is provided in the system, which is used to monitor the pressure change of the outer oil bag 140 in real time; Based on the principle of ocean hydrostatic pressure, as the diving depth of the device increases, the external water pressure acting on the external oil bag will also increase accordingly. Therefore, by measuring the pressure value of the external oil bag 140 and applying the built-in function algorithm of the system, the algorithm uses salinity, pressure, and temperature as variables to accurately calculate the current depth of the device. When the detection depth is a given depth, the controller can be used to control it to float up; In general, the provision of the second pressure sensor 142 provides a simple and effective method for determining the specific location of the device underwater, which is essential for accurate marine environment monitoring. The device can automatically adjust buoyancy or perform specific tasks as needed, and ensure that the device will not face risks due to loss of depth control, thereby enhancing reliability and safety.

[0032] Preferably, a power generation system is also included, which includes: A mover 150 is disposed on the piston 121 and moves with the up and down reciprocating motion of the piston 121; The wire winding 151 is arranged around the outside of the pressure reducing oil cylinder 120 to form a part of the electromagnetic induction circuit. When the mover 150 moves up and down with the piston 121, it cuts the magnetic field lines generated by the wire winding 151, and this process generates an induced current; The energy storage battery 152 is connected to the wire winding 151 through a rectifier 153. A control module 154 is provided between the rectifier 153 and the energy storage battery 152. The function of the rectifier 153 is to convert the generated alternating current into direct current to ensure that the current can be stably charged into the energy storage battery 152 for subsequent use or standby of the device.

[0033] That is to say, during the operation of the pressure reducing cylinder 120 , the magnetic flux lines generated by the power supply of the wire winding 151 are cut by the passive element 150 , and the generated electric energy is rectified by the rectifier 153 to charge the energy storage battery 152 .

[0034] The setting of the power generation system has at least the following advantages: 1. Enhanced self-power supply capability: The addition of the power generation system enables the device to not only obtain mechanical energy from the ocean temperature difference for buoyancy adjustment, but also further convert this mechanical energy into electrical energy for storage, so that it can generate electricity while not delaying buoyancy adjustment. This dual energy utilization method greatly enhances the device's self-power supply capability and reduces dependence on external power sources. 2. Extend working hours: Through continuous energy recovery and storage, the equipment can operate for a long time without replacing batteries, significantly extending its underwater working time and improving mission execution efficiency; 3. Improve reliability: The built-in power generation system provides a reliable source of power, ensuring the normal operation of key functions (such as communication, data logging, etc.) even under extreme conditions, increasing the reliability and adaptability of the equipment; 4. Environmental protection and energy saving: Using the natural ocean temperature difference to generate electricity is in line with the concept of green energy, avoiding the environmental burden brought by traditional batteries and helping to protect the marine ecosystem; 5. Multifunctional integrated design: The organic combination of the power generation mechanism and the buoyancy adjustment system achieves structural compactness and functional diversity, which not only simplifies the design of the equipment but also improves the overall performance.

[0035] In addition, it should be noted that existing ocean observers cannot combine the two functions of buoyancy regulation and energy recovery and power generation well, or after combining the two functions, there are problems of bulky size and excessive load. For example, traditional design schemes usually design the buoyancy regulation system and the energy recovery and power generation system as two independent parts, which means that each system has its own components and structure. For example, the energy recovery system may include components such as heat exchangers and generators, while the buoyancy regulation system may require air bags or hydraulic systems. This separate design leads to an increase in the size and weight of the entire device.

[0036] In comparison, the device provided in this embodiment adopts an integrated design approach, integrating the buoyancy regulation and energy recovery power generation system into a compact unit, and reduces the number of independent components through the organic combination of the phase change chamber, accumulator, pressure relief cylinder, inner oil bag, outer oil bag and power generation system, thereby avoiding the space waste and weight increase caused by the two independent systems in the traditional design; Secondly, by designing an efficient energy conversion mechanism, the phase change caused by the absorption or release of heat by the phase change material is used to drive the hydraulic system to work, and the mechanical energy is generated by the up and down reciprocating motion of the piston and then converted into electrical energy. This design does not require large heat engines or other bulky energy conversion equipment, thereby reducing the size and weight of the overall system.

[0037] As a result, the device provided in this embodiment can achieve both buoyancy regulation and energy recovery power generation while ensuring that the device volume and load are small, thereby achieving miniaturization and lightweight of the device.

[0038] In addition, the design of the generator mechanism not only realizes the recovery and conversion of energy during the action of the pressure reducing cylinder 120, but also plays a damping role, which can effectively slow down the speed of oil inflow and outflow. This smooth oil flow helps to avoid pressure shocks and system vibrations caused by excessive flow rate, thereby protecting various components of the hydraulic system from potential damage.

[0039] In addition, the smooth oil transfer process makes the control of buoyancy adjustment more precise. When the buoyancy state of the equipment needs to be adjusted to adapt to the mission requirements at different depths, the slow and steady flow of oil can ensure that the volume change between the inner oil bag 130 and the outer oil bag 140 is more controllable, thereby improving the stability and operating accuracy of the equipment in the water.

[0040] Preferably, the pressure reducing cylinder 120 has a small oil chamber 122 and a large oil chamber 123, and the piston 121 located in the small oil chamber 122 has an annular groove 1211 on its circumferential surface. The design of the small oil chamber 122 and the large oil chamber 123 allows a larger volume of oil to flow under control through a smaller pressure change. In the process of the piston 121 reciprocating up and down, the pressure reducing cylinder 120 can achieve the purpose of pressure reduction. In actual applications, for example, the high-pressure accumulator 110 outputs 2Mpa of high-pressure oil, and the pressure reducing cylinder 120 can output 0.1Mpa of oil pressure, but the pressure reducing cylinder 120 can output 20 times of oil, and the transportation efficiency is higher.

[0041] That is to say, as the high-pressure oil in the accumulator 110 pushes the piston 121 of the pressure reducing cylinder 120 to move up and down, on the one hand, the up and down movement of the mover 150 can be converted into electrical energy and replenished to the energy storage battery 152; on the other hand, the pressure reducing cylinder 120 can inhale or push out oil several times the volume of the high-pressure oil into the outer oil bag 140 or the inner oil bag 130.

[0042] Preferably, a first reversing valve 160 is provided between the accumulator 110 and the pressure reducing cylinder 120, the accumulator 110 and the annular groove 1211 are connected via a first pipeline 111, and the annular groove 1211 and the first reversing valve 160 are connected via a second pipeline 161. The oil in the accumulator 110 passes through the first pipeline 111 and the annular groove 1211 once and then flows along the second pipeline 161 to the first reversing valve 160, thereby pushing the first reversing valve 160 to reverse.

[0043] Preferably, a third pipeline 162 is provided between the first reversing valve 160 and the bottom of the small oil chamber 122, and the third pipeline 162 is connected to the inner oil bag 130. When the piston 121 of the pressure reducing cylinder 120 reciprocates up and down, the third pipeline 162 is used for injecting and discharging oil from the small oil chamber 122 and injecting the first reversing valve 160 to promote its reversing. The third pipeline 162 is also unidirectionally connected to the inner oil bag 130. When the oil in the small oil chamber 122 is discharged, this part of the oil will flow into the inner oil bag 130 along the third pipeline 162.

[0044] Specifically, the following is a principle description of how the piston 121 of the pressure reducing oil cylinder 120 performs up and down reciprocating motion: First, the piston 121 has a top position and a bottom position; When the piston 121 is at the top position, the high-pressure oil of the accumulator 110 flows into the top of the small oil chamber 122 after passing through the first reversing valve 160 and pushes the piston 121 downward. At this time, the piston 121 discharges the oil in the large oil chamber 123 outward to the outer oil bag 140 or the inner oil bag 130, and the oil in the small oil chamber 122 is discharged to the inner oil bag 130 through the third pipeline 162. At the same time, part of the high-pressure oil of the accumulator 110 flows into the first reversing valve 160 through the first pipeline 111, the annular groove 1211, and the second pipeline 161 in sequence and pushes it to change direction; When the piston 121 moves to the bottom position, the first reversing valve 160 has completed the reversing. After the high-pressure oil of the accumulator 110 passes through the first reversing valve 160, it flows into the bottom of the small oil chamber 122 along the third pipeline 162 and pushes the piston 121 to move upward. At this time, the large oil chamber 123 absorbs oil from the outer oil bag 140 or the inner oil bag 130. At the same time, the oil at the top of the small oil chamber 122 is discharged outward, and after passing through the first reversing valve 160, it flows outward along the third pipeline 162 and flows into the annular groove 1211, and finally flows along the second pipeline 161 to the first reversing valve 160 to push it to reverse again.

[0045] That is to say, as long as the accumulator 110 continues to inject high-pressure oil into the decompression cylinder 120 , the piston 121 of the decompression cylinder 120 can continue to reciprocate up and down to achieve the purpose of oil transfer between the outer oil bag 140 and the inner oil bag 130 .

[0046] The following is a description of the principle of how oil transfer is achieved between the outer oil bladder 140 and the inner oil bladder 130: Preferably, a second reversing valve 170 is further included, and the inner oil bag 130, the outer oil bag 140 and the bottom of the large oil chamber 123 are connected through the second reversing valve 170. Among them, an oil inlet pipeline 171 and an oil outlet pipeline 172 are provided between the second reversing valve 170 and the bottom of the large oil chamber 123, and a first check valve 1711 and a second check valve 1721 are respectively provided on the oil inlet pipeline 171 and the oil outlet pipeline 172. The oil inlet pipeline 171 is in one-way communication with the pressure reducing oil cylinder 120 through the first check valve 1711, and the oil can only enter the large oil chamber 123 along the oil inlet pipeline 171, and the oil outlet pipeline 172 is in one-way communication with the pressure reducing oil cylinder 120 through the second check valve 1721, and the oil in the large oil chamber 123 can only be discharged outward along the oil outlet pipeline 172.

[0047] Specifically, during the sinking process of the equipment, as the piston 121 reciprocates up and down, the oil in the outer oil bag 140 is sucked into the large oil chamber 123 through the fourth reversing valve 141, the second reversing valve 170, and the oil inlet pipeline 171, and the oil in the large oil chamber 123 is injected into the inner oil bag 130 through the oil outlet pipeline 172, the second reversing valve 170, and the fifth reversing valve 132 in sequence. The volume of the outer oil bag 140 is reduced, which can reduce the overall volume of the equipment and reduce the buoyancy, ensuring that the equipment can sink smoothly. During the floating process, the second reversing valve 170 is reversed. As the piston 121 reciprocates up and down, the oil in the inner oil bag 130 is sucked into the large oil chamber 123 through the fifth reversing valve 132, the second reversing valve 170, and the oil inlet pipe 171 in turn. The oil in the large oil chamber 123 is injected into the outer oil bag 140 through the oil outlet pipe 172 and the second reversing valve 170 in turn. At this time, the volume of the outer oil bag 140 increases, which increases the buoyancy of the equipment and enables it to float smoothly.

[0048] In addition, in order to more accurately control the flow direction of the entire hydraulic system, the following is a supplementary description of the hydraulic system: A fourth reversing valve 141 is provided on the pipeline between the outer oil bladder 140 and the second reversing valve 170, and a fifth reversing valve 132 is provided on the pipeline between the inner oil bladder 130 and the second reversing valve 170. A third one-way valve 131 is provided between the inner oil bladder 130 and the phase change chamber 100, and a fourth one-way valve 101 is provided between the phase change chamber 100 and the accumulator 110, to ensure that the oil can only flow from the inner oil bladder 130 to the phase change chamber 100, and the phase change chamber 100 to the accumulator 110.

[0049] A third reversing valve 113 is provided between the accumulator 110 and the pressure reducing oil cylinder 120. The third reversing valve 113 has only a one-way conduction or closing function. When the third reversing valve 113 is opened, the oil in the accumulator 110 can flow to the oil cylinder.

[0050] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical schemes composed of any combination of the above technical features. The above is a specific implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0053] The technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0054] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An energy recovery and buoyancy adjustment device based on ocean temperature difference energy, characterized in that: include: a phase change cavity having a phase change material therein; an accumulator, which is in communication with the phase change chamber; A pressure reducing oil cylinder is connected to the accumulator, and the high-pressure oil of the accumulator causes the piston of the pressure reducing oil cylinder to reciprocate up and down; The inner oil bag and the outer oil bag are connected through the pressure reducing oil cylinder. When the piston of the pressure reducing oil cylinder reciprocates up and down, oil flows between the inner oil bag and the outer oil bag to achieve buoyancy adjustment. A power generation system comprising: A mover, which is arranged on the piston; An electric wire winding is arranged outside the pressure reducing oil cylinder, and as the piston reciprocates up and down, the mover cuts the electric wire winding and generates electric current; The energy storage battery is connected to the wire winding via a rectifier. The current generated by the mover cutting the wire winding passes through the rectifier and is then charged into the energy storage battery.

2. The energy recovery and buoyancy adjustment device based on ocean temperature difference energy according to claim 1, characterized in that: The pressure reducing oil cylinder comprises a small oil chamber and a large oil chamber, and the piston located in the small oil chamber has an annular groove on its circumferential surface.

3. The energy recovery and buoyancy adjustment device based on ocean temperature difference energy according to claim 2, characterized in that: A first reversing valve is provided between the accumulator and the pressure reducing oil cylinder, the accumulator is communicated with the annular groove via a first pipeline, and the annular groove is communicated with the first reversing valve via a second pipeline.

4. The energy recovery and buoyancy adjustment device based on ocean temperature difference energy according to claim 3, characterized in that: A third pipeline is provided between the first reversing valve and the bottom of the small oil chamber, and the third pipeline is communicated with the inner oil bag.

5. The energy recovery and buoyancy adjustment device based on ocean temperature difference energy according to claim 4, characterized in that: When the high-pressure oil of the accumulator is injected into the pressure reducing oil cylinder and causes the piston to reciprocate up and down, the piston has a top position and a bottom position, wherein: When the piston is at the top position, the high-pressure oil of the accumulator flows into the top of the small oil chamber after passing through the first reversing valve and pushes the piston downward, and at the same time, part of the high-pressure oil of the accumulator flows into the first reversing valve after passing through the first pipeline, the annular groove, and the second pipeline in sequence and pushes it to reversal; When the piston moves to the bottom position, the first reversing valve completes the reversal, and the high-pressure oil of the accumulator flows into the bottom of the small oil chamber through the first reversing valve and pushes the piston to move upward. At this time, the oil at the top of the small oil chamber passes through the first reversing valve, and then passes through the third pipeline, the annular groove, and the second pipeline in sequence, and then flows into the first reversing valve and pushes it to reversal.

6. The energy recovery and buoyancy adjustment device based on ocean temperature difference energy according to claim 2, characterized in that: It also includes a second reversing valve, through which the inner oil bag, the outer oil bag and the bottom of the large oil chamber are connected.

7. The energy recovery and buoyancy adjustment device based on ocean temperature difference energy according to claim 6, characterized in that: An oil inlet pipeline and an oil outlet pipeline are provided between the second reversing valve and the bottom of the large oil chamber, and a first one-way valve and a second one-way valve are provided on the oil inlet pipeline and the oil outlet pipeline, respectively.

8. The energy recovery and buoyancy adjustment device based on ocean temperature difference energy according to claim 7, characterized in that: During the sinking process, as the piston reciprocates up and down, the oil in the outer oil bag is sucked into the large oil chamber through the second reversing valve and the oil inlet pipeline, and the oil in the large oil chamber is injected into the inner oil bag through the oil outlet pipeline and the second reversing valve in turn.

9. The energy recovery and buoyancy adjustment device based on ocean temperature difference energy according to claim 7, characterized in that: During the floating process, as the piston reciprocates up and down, the oil in the inner oil bag is sucked into the large oil chamber through the second reversing valve and the oil inlet pipeline in turn, and the oil in the large oil chamber is injected into the outer oil bag through the oil outlet pipeline and the second reversing valve in turn.

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