CN108826802B - Cooling water system for deep sea manned platform - Google Patents
Cooling water system for deep sea manned platform Download PDFInfo
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- CN108826802B CN108826802B CN201810835015.8A CN201810835015A CN108826802B CN 108826802 B CN108826802 B CN 108826802B CN 201810835015 A CN201810835015 A CN 201810835015A CN 108826802 B CN108826802 B CN 108826802B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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Abstract
The invention discloses a cooling water system for a deep sea manned platform, and belongs to the field of deep sea equipment. The cooling water system comprises an outboard cooling circuit and an inboard cooling circuit; the outboard cooling loop comprises an intermediate heat exchanger, an outboard seawater pipeline and an outboard fresh water pipeline, the outboard seawater pipeline and the outboard fresh water pipeline pass through the interior of the intermediate heat exchanger, and the outboard fresh water pipeline is connected with an electric stop valve and a pressure balancing device; the cabin cooling loop comprises a heat exchange water cabin, a water outlet pipeline and a water inlet pipeline, wherein the water outlet end of the water cooling equipment is connected with the water outlet pipeline, the water inlet end of the water cooling equipment is connected with the water inlet pipeline, the bow side and the stern side of the heat exchange water cabin are respectively connected with a three-way change-over valve, a driving motor of the three-way change-over valve is controlled by a controller, and an outboard fresh water pipeline is connected with the cabin cooling loop; the pressure-resistant design pressure of the heat exchange tube of the intermediate heat exchanger and the outboard fresh water pipeline is reduced, the potential safety hazard caused by the fresh water entering and exiting the pressure-resistant shell during the deep sea work is avoided, and the safety of the system is improved.
Description
Technical Field
The embodiment of the invention relates to the field of deep sea equipment, in particular to a cooling water system for a deep sea manned platform.
Background
The deep sea manned platform is one kind of underwater equipment carrying scientists or engineering technicians and carrying detection and operation devices for engineering operation, resource detection and development and marine scientific research in deep water or under sea, and is one complicated system comprising one series of parts, equipment and subsystems for executing corresponding functions. Heavy-duty deep sea manned platforms are usually equipped with cooling water systems for cooling power, propulsion and other heat dissipation equipment of the total station system in the cabin, so that the working temperature of each equipment is kept in a proper range, and the normal and stable work of each equipment is ensured. In order to avoid that the high-pressure seawater outside the ship enters the cabin, reduce the design pressure of water cooling equipment and a cooling pipeline in the cabin, reduce the corrosion of the seawater and improve the reliability and the service life of the system, for an underwater manned platform with sufficient space between ships, a multi-stage cooling mode is usually adopted, an intermediate heat exchanger is arranged outside the ship, the seawater outside the ship and the high-temperature fresh water in the cabin are respectively introduced into the cold/hot sides of the intermediate heat exchanger, and the seawater and the fresh water are respectively returned to the outside of the ship and the cabin after heat exchange.
Although the design pressure of the water cooling equipment and the fresh water pipeline in the cabin can be reduced by the cooling scheme, the problem that a large number of heat exchange pipes and outboard fresh water pipelines in the intermediate heat exchanger need to resist seawater external pressure is brought along with the design depth of the deep sea manned platform, the processing difficulty of the intermediate heat exchanger is obviously increased, the risk of damage and leakage of the heat exchange pipes and the outboard fresh water pipelines is very high in the deep sea state, and once outboard high-pressure seawater enters the cabin through the damaged heat exchange pipes or the outboard fresh water cooling pipelines, the caused consequence is disastrous to the underwater platform.
Disclosure of Invention
In order to solve the problems in the prior art, embodiments of the present invention provide a cooling water system that has a pressure balancing function for an outboard fresh water pipeline, and that can exchange heat with outboard seawater through an in-tank heat exchange water tank, and that has high safety. The technical scheme is as follows:
in a first aspect, there is provided a cooling water system for a deep sea manned platform, the cooling water system comprising an outboard cooling circuit and an inboard cooling circuit;
the outboard cooling circuit is arranged outboard of the deep sea manned platform, and the in-cabin cooling circuit is arranged in the cabin of the deep sea manned platform;
the outboard cooling loop comprises an intermediate heat exchanger, an outboard seawater pipeline, an outboard fresh water pipeline, an electric stop valve and a pressure balancing device, wherein a seawater pump is arranged on the outboard seawater pipeline, and the outboard seawater pipeline and the outboard fresh water pipeline respectively pass through the interior of the intermediate heat exchanger;
the pressure balancing device comprises a fresh water cavity and a seawater cavity, and the outboard fresh water pipeline is connected with the fresh water cavity of the pressure balancing device through the electric stop valve;
the cabin cooling loop comprises a controller, water cooling equipment, a heat exchange water cabin, a water outlet pipeline and a water inlet pipeline, wherein a temperature sensor, a fresh water pump, a first three-way conversion valve and a first side valve are sequentially arranged on the water outlet pipeline, and a second side valve and a second three-way conversion valve are sequentially arranged on the water inlet pipeline;
the water outlet end of the water cooling equipment is connected with the water outlet pipeline, and the water inlet end of the water cooling equipment is connected with the water inlet pipeline;
the bow side of the heat exchange water tank is connected with a second three-way change-over valve, the stern side of the heat exchange water tank is connected with a first three-way change-over valve, and the bottom of the heat exchange water tank is a pressure-resistant shell of the deep sea manned platform;
the controller is connected with the temperature sensor, the servo motor of the first three-way conversion valve and the servo motor of the second three-way conversion valve;
the water inlet end of the outboard fresh water pipeline of the outboard cooling loop is connected with the water outlet pipeline of the cabin cooling loop, and the water outlet end of the outboard fresh water pipeline is connected with the water inlet pipeline of the cabin cooling loop.
Optionally, the interior of the pressure equalisation device is divided by a sealing piston into a fresh water chamber and a seawater chamber.
Optionally, a first end of the first three-way change-over valve is connected with a water outlet end of the water cooling equipment, a second end of the first three-way change-over valve is connected with the first side valve, and a third end of the first three-way change-over valve is connected with a stern side of the heat exchange water tank;
the first end of the second three-way change-over valve is connected with the water inlet end of the water cooling equipment, the second end of the second three-way change-over valve is connected with the second side valve, and the third end of the second three-way change-over valve is connected with the bow side of the heat exchange water tank.
Optionally, when the temperature collected by the temperature sensor is higher than the first temperature,
the electric stop valve in the outboard cooling loop is closed, the sea water pump and the fresh water pump are opened, the first side valve and the second side valve are opened, the opening degree between the first end and the second end of the first three-way change-over valve and the second three-way change-over valve is maximum, and the opening degree between the first end and the third end of the first three-way change-over valve and the second three-way change-over valve is zero.
Optionally, when the temperature of the effluent collected by the temperature sensor is equal to the first temperature and the temperature of the effluent equal to the first temperature is the first occurrence,
the controller controls the driving motors of the first three-way switching valve and the second three-way switching valve to rotate, under the action of the driving motors, the opening degrees between the first ends and the second ends of the first three-way switching valve and the second three-way switching valve are reduced, and the opening degrees between the first ends and the third ends are increased;
when the opening degree between the first end and the third end of the first three-way switching valve and the second three-way switching valve is maximum and the opening degree between the first end and the second end is zero, the first side valve and the second side valve are closed, and the electric stop valve is opened.
Optionally, if the temperature of the effluent collected by the temperature sensor is increased to a second temperature, the driving motors of the first three-way conversion valve and the second three-way conversion valve stop rotating;
the first temperature is lower than the second temperature.
Optionally, the intermediate heat exchanger is a shell-and-tube type.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
(1) through the arrangement of the pressure balancing device and the electric stop valve, the effect that the intermediate heat exchanger heat exchange tube and the outboard fresh water pipeline do not bear the internal and external pressure difference in the deep sea state is realized, the design pressure requirements of the intermediate heat exchanger heat exchange tube and the outboard fresh water pipeline are reduced, the processing difficulty is reduced, and the system safety is improved.
(2) Through the arrangement of the heat exchange water tank and the three-way change-over valve, the function of utilizing the bottom surface of the heat exchange water tank to transfer heat with the outboard seawater is realized, potential safety hazards caused by the fact that fresh water enters and exits the pressure-resistant shell are thoroughly avoided in a deep sea state, the system safety is further improved, and the pressure balance design of the outboard fresh water pipeline is made possible.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic illustration of a cooling water system for a deep sea manned platform, according to an exemplary embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a schematic diagram of a cooling water system for a deep sea manned platform according to an embodiment of the present invention is shown. As shown in fig. 1, the cooling water system for a deep sea manned platform includes an outboard cooling circuit and an inboard cooling circuit.
The outboard cooling circuit is disposed outboard of the deep sea manned platform and the inboard cooling circuit is disposed inboard 101 of the deep sea manned platform.
The outboard cooling circuit includes an intermediate heat exchanger 2, an outboard fresh water pipe, an outboard sea water pipe, an electric shutoff valve 3, and a pressure balancing device 4.
A seawater pump 1 is arranged on the outboard seawater pipeline and is used for pumping the outboard seawater of the deep sea manned platform.
The pressure balancing device 4 comprises a fresh water cavity and a seawater cavity, and the outboard fresh water pipeline is connected with the fresh water cavity of the pressure balancing device 4 through the electric stop valve 3.
Optionally, the interior of the pressure equalisation device is divided by a sealing piston into a fresh water chamber and a seawater chamber.
The outboard seawater pipe and the outboard freshwater pipe pass through the inside of the intermediate heat exchanger 2, respectively. The seawater in the outboard seawater pipe and the fresh water in the outboard fresh water pipe exchange heat in the intermediate heat exchanger 2, after the heat exchange is completed, the seawater in the outboard seawater pipe returns to the outboard, and the fresh water in the outboard fresh water pipe returns to the water cooling device 13 in the cabin.
Optionally, intermediate heat exchanger 2 is shell-and-tube.
The value of the design pressure of the intermediate heat exchanger 2 and the outboard fresh water pipeline can be far smaller than the pressure value of the maximum working depth of the deep sea manned platform.
The shell 100 of the deep sea manned platform is provided with a cabin penetrating welding piece 15 and a cabin penetrating welding piece 14, and the outboard cooling loop is communicated with the inboard cooling loop through the cabin penetrating welding piece 15 and the cabin penetrating welding piece 14.
Specifically, the water inlet end of the outboard fresh water pipe is connected to the water outlet pipe of the in-tank cooling circuit through the cross-tank weldment 15, and the water outlet end of the outboard fresh water pipe is communicated with the water inlet pipe of the in-tank cooling circuit through the cross-tank weldment 14.
The working state of the electric shutoff valve 3 is controlled by a drive motor of the electric shutoff valve 3.
Optionally, the motor at the driving end of the electric stop valve 3 and the seawater pump 1 adopt a mode suitable for a seawater pressure environment such as pressure resistance or oil charge.
The cabin cooling loop comprises a controller 12, a water cooling device 13, a heat exchange water cabin 5, a water outlet pipeline and a water inlet pipeline.
The water outlet pipeline is sequentially provided with a temperature sensor 11, a fresh water pump 10, a first three-way conversion valve 8 and a first side valve 6.
Optionally, the fresh water pump is configured to provide return water power for fresh water in the intake pipeline and the outboard fresh water pipeline of the cabin interior cooling circuit.
The bottom of the heat exchange water tank 5 is a pressure-resistant shell of the deep sea manned platform.
A second side valve 7 and a second three-way change-over valve 9 are sequentially arranged on the water inlet pipeline.
The controller 12 is connected to the temperature sensor 11, the servo motor of the first three-way switching valve 8, and the servo motor of the second three-way switching valve 9, respectively.
The temperature collector 11 collects the temperature of the water outlet end of the water cooling device 13, namely the outlet water temperature, and sends the collected outlet water temperature to the controller 12.
The controller 12 controls the working states of the servo motor of the first three-way switching valve 8 and the servo motor of the second three-way switching valve 9 according to the outlet water temperature collected by the temperature sensor 11.
The water outlet end of the water cooling device 13 is connected with the water outlet pipeline, and the water inlet end of the water cooling device 13 is connected with the water inlet pipeline.
The fore side of the heat exchange water tank 5 is connected with a second three-way change-over valve 9, and the stern side of the heat exchange water tank 5 is connected with a first three-way change-over valve 8. The fore side of the heat exchange water tank 5 is discharged, and the stern side of the heat exchange water tank 5 is fed with water.
Specifically, the bow side of the heat exchange water tank 5 is connected with the third end c of the second three-way switching valve 9, and the stern side of the heat exchange water tank 5 is connected with the third end c of the first three-way switching valve 8.
A first end a of the first three-way change-over valve 8 is connected with a water outlet end of the water cooling equipment 13, and a second end b of the first three-way change-over valve 8 is connected with the first side valve 6;
the first end a of the second three-way change-over valve 9 is connected with the water inlet end of the water cooling equipment 13, and the second end b of the second three-way change-over valve 9 is connected with the second side valve 7.
The size of the pressure-resistant shell to be used is determined according to the size of the heat exchange water tank 14. The pressure shell of the deep sea manned platform is used as the bottom of the heat exchange water tank 14, so that the heat exchange water tank 14 has a larger bottom surface area and a smaller water tank height.
And determining the working state of the cooling water system according to the water outlet temperature of the water cooling equipment acquired by the temperature sensor. When the cooling water system works, the temperature sensor 11 continuously detects the outlet water temperature of the water cooling device 13 and sends the collected outlet water temperature to the controller 12.
When the deep sea manned platform is in a water surface sailing state, the temperature of outboard seawater is high, the temperature sensor 11 collects the outlet water temperature of the water cooling equipment 13, if the outlet water temperature collected by the temperature sensor 11 is higher than a first temperature, the electric stop valve 3 in the outboard cooling loop is closed, the seawater pump 1 and the freshwater pump 10 are opened, the first side valve 6 and the second side valve 7 are opened, the opening degree between the first end a and the second end b of the first three-way change-over valve 8 and the second three-way change-over valve 9 is maximum, and the opening degree between the first end a and the second end c of the first three-way change-over valve 8 and the second three-way change-over valve 9 is zero.
At this time, the outboard seawater and the fresh water flowing out of the water cooling equipment 13 in the cabin are sent to the intermediate heat exchanger 2 outside the cabin for heat exchange, the seawater returns to the ocean after absorbing heat, and the fresh water returns to the water cooling equipment 13 in the cabin, and the cycle is repeated.
When the deep sea manned platform submerges, the temperature of outboard seawater begins to gradually decrease, the temperature of the effluent water of the water cooling equipment 13 begins to decrease, when the temperature of the effluent water collected by the temperature sensor 11 is equal to a first temperature, and the temperature of the effluent water equal to the first temperature is the first temperature, the controller 12 controls the driving motors of the first three-way switching valve 8 and the second three-way switching valve 9 to rotate, so that the opening degree from the first end a to the second end b of the first three-way switching valve 8 and the opening degree from the first end a to the third end c of the second three-way switching valve 9 are reduced, the opening degree from the first end a to the third end c is increased, the fresh water flowing out of the water cooling equipment 13 begins to be shunted at the first three-way switching valve 8, one part continues to be circulated originally, the other part enters the heat exchange water tank 5, the fresh water flowing out of the heat exchange water tank 5 is collected with the, and (5) realizing circulation. Because the temperature difference exists between the fresh water in the heat exchange water tank 5 and the outboard seawater, the fresh water in the heat exchange water tank 5 can transfer heat to the outboard seawater through the tank bottom surface of the heat exchange water tank 5, but because the heat transfer capacity of the bottom surface of the heat exchange water tank 5 is smaller than that of the intermediate heat exchanger 2, the temperature of the fresh water flowing out of the water cooling equipment 13 gradually rises back until the temperature of the fresh water flowing out of the water cooling equipment 13 is recovered to the second temperature, and the driving motors of the first three-way conversion valve 8 and the second three-way conversion valve 9 stop acting; it should be noted that, during the process of the temperature rising of the fresh water flowing out of the water cooling equipment 13, the first three-way switching valve 8 and the second three-way switching valve 9 still increase the opening degree between the first end a and the third end c and decrease the opening degree between the first end a and the second end b under the action of the driving motor.
The temperature of the seawater continues to drop along with the increase of the submergence depth of the deep sea manned platform, the process is repeated until the first three-way switching valve 8 and the second three-way switching valve 9 are completely switched to be the maximum opening degree from the first end a to the third end c, and the opening degree from the first end a to the second end b is zero, the driving motors of the first three-way switching valve 8 and the second three-way switching valve 9 stop acting, meanwhile, the first side valve 6 and the second side valve 7 are closed, and the electric stop valve 3 is opened. At this time, the piston in the pressure balancing device 4 slides from the seawater cavity to the freshwater cavity under the seawater pressure, so that the pressures of the freshwater cavity and the seawater cavity are balanced, the pressure in the heat exchange tube of the intermediate heat exchanger 2 and the pressure in the outboard freshwater pipeline are equal to that of the outboard seawater, and the heat exchange tube of the intermediate heat exchanger and the outboard freshwater pipeline do not bear the internal and external pressure difference.
Optionally, the first temperature and the second temperature are determined according to actual conditions, and the first temperature is lower than the second temperature.
It should be noted that, when the deep sea manned platform floats upwards, according to the temperature of the effluent water of the water cooling equipment 13 collected by the temperature sensor 11, the working process of the cooling water system of the deep sea manned platform is the reverse process of submergence, that is, in the floating process, along with the rise of the temperature of the sea water, the opening degree between the first end and the second end of the first three-way switching valve and the second three-way switching valve is increased, the opening degree between the first end and the third end is decreased until the opening degree between the first end and the second end is maximum, and the opening degree between the first end and the third end is zero.
It should be noted that: the above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A cooling water system for a deep sea manned platform, characterized in that the cooling water system comprises an outboard cooling circuit and an inboard cooling circuit;
the outboard cooling circuit is arranged outboard of the deep sea manned platform, and the inboard cooling circuit is arranged in the deep sea manned platform;
the outboard cooling loop comprises an intermediate heat exchanger, an outboard seawater pipeline, an outboard fresh water pipeline, an electric stop valve and a pressure balancing device, wherein a seawater pump is arranged on the outboard seawater pipeline, and the outboard seawater pipeline and the outboard fresh water pipeline respectively pass through the interior of the intermediate heat exchanger;
the pressure balancing device comprises a fresh water cavity and a seawater cavity which are separated by a sealing piston, and the outboard fresh water pipeline is connected with the fresh water cavity of the pressure balancing device through an electric stop valve;
the cabin cooling loop comprises a controller, water cooling equipment, a heat exchange water cabin, a water outlet pipeline and a water inlet pipeline, wherein the water outlet pipeline is sequentially provided with a temperature sensor, a fresh water pump, a first three-way conversion valve and a first side valve, and the water inlet pipeline is sequentially provided with a second side valve and a second three-way conversion valve; the first end of the first three-way change-over valve is connected with the water outlet end of the water cooling equipment, the second end of the first three-way change-over valve is connected with the first side valve, and the third end of the first three-way change-over valve is connected with the stern side of the heat exchange water tank; the first end of the second three-way change-over valve is connected with the water inlet end of the water cooling equipment, the second end of the second three-way change-over valve is connected with the second side valve, and the third end of the second three-way change-over valve is connected with the bow side of the heat exchange water tank;
the water outlet end of the water cooling equipment is connected with the water outlet pipeline, and the water inlet end of the water cooling equipment is connected with the water inlet pipeline;
the bow side of the heat exchange water tank is connected with a second three-way change-over valve, the stern side of the heat exchange water tank is connected with the first three-way change-over valve, and the bottom of the heat exchange water tank is a pressure-resistant shell of the deep sea manned platform;
the controller is connected with the temperature sensor, the servo motor of the first three-way conversion valve and the servo motor of the second three-way conversion valve;
the water inlet end of the outboard fresh water pipeline of the outboard cooling circuit is connected with the water outlet pipeline of the cabin cooling circuit, and the water outlet end of the outboard fresh water pipeline is connected with the water inlet pipeline of the cabin cooling circuit;
when the deep sea manned platform submerges, the controller controls the driving motors of the first three-way switching valve and the second three-way switching valve to rotate, so that the opening degrees from the first end to the second end of the first three-way switching valve and the second three-way switching valve are reduced, the opening degrees from the first end to the third end of the second three-way switching valve are increased, the driving motors of the first three-way switching valve and the second three-way switching valve stop working until the first three-way switching valve and the second three-way switching valve are completely switched to be the maximum opening degrees from the first end to the third end and the zero opening degrees from the first end to the second end, meanwhile, the first side valve and the second side valve are closed, the electric stop valve is opened, and a piston in the pressure balancing device slides from a seawater cavity to a freshwater cavity under the seawater pressure, so that the pressures of the freshwater cavity and the seawater cavity are balanced.
2. The cooling water system as claimed in claim 1, wherein when the temperature of the outlet water collected by the temperature sensor is higher than a first temperature,
the electric stop valve in the outboard cooling circuit is closed, the sea water pump and the fresh water pump are opened, the first side valve and the second side valve are opened, the opening degree between the first end and the second end of the first three-way switching valve and the second three-way switching valve is maximum, and the opening degree between the first end and the third end of the first three-way switching valve and the second three-way switching valve is zero.
3. The cooling water system as claimed in claim 1, wherein when the temperature of the outlet water collected by the temperature sensor is equal to a first temperature and the temperature of the outlet water equal to the first temperature is the first occurrence,
the controller controls the driving motors of the first three-way switching valve and the second three-way switching valve to rotate, and under the action of the driving motors, the opening degrees between the first ends and the second ends of the first three-way switching valve and the second three-way switching valve are reduced, and the opening degrees between the first ends and the third ends are increased;
when the opening degree between the first end and the third end of the first three-way switching valve and the second three-way switching valve is maximum and the opening degree between the first end and the second end is zero, the first side valve and the second side valve are closed, and the electric stop valve is opened.
4. The cooling water system as claimed in claim 3, wherein if the temperature of the outlet water collected by the temperature sensor is increased to a second temperature, the driving motors of the first and second three-way switching valves are stopped;
the first temperature is lower than the second temperature.
5. A cooling water system according to any one of claims 1 to 4, wherein the intermediate heat exchanger is a shell and tube type.
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CN109987206B (en) * | 2019-04-02 | 2020-03-27 | 中国船舶科学研究中心(中国船舶重工集团公司第七0二研究所) | Large-depth natural circulation normal pressure type seawater exchange system |
CN111516832B (en) * | 2020-04-20 | 2021-03-09 | 中国船舶科学研究中心 | Heat accumulating type cooling system for underwater platform and use method thereof |
CN111591419B (en) * | 2020-05-22 | 2021-07-06 | 中国船舶科学研究中心 | Hot cabinet cooling system for deep sea manned platform |
CN114030580A (en) * | 2021-11-25 | 2022-02-11 | 中国船舶科学研究中心 | Inter-board cooling system of multi-shell underwater unmanned aircraft |
CN116331465B (en) * | 2023-03-15 | 2024-01-26 | 深海技术科学太湖实验室 | In-situ manned platform temperature and humidity control system |
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