Three-stage thermal insulation system of deep sea sampler and control method thereof

Abstract

The invention discloses a three-stage heat preservation system of a deep sea sampler and a control method of the three-stage heat preservation system. The heat preservation system comprises a first-stage subsystem, a second-stage subsystem, a third-stage subsystem and a main control module. The primary subsystem comprises a heat preservation cylinder and a semiconductor chilling plate I, the semiconductor chilling plate I is arranged on the inner wall of the heat preservation cylinder, and a fan is installed at the cold end of the semiconductor chilling plate I; a temperature sensor I is arranged in the heat preservation cylinder; the secondary subsystem comprises a cold liquid cylinder and a semiconductor chilling plate II; the cold liquid cylinder is mounted in the heat preservation cylinder; the third-stage subsystem comprises a circulating pump and a condensation pipe; a water inlet of the cold liquid cylinder, a condensation pipe in the sampler, the circulating pump and a water outlet of the cold liquid cylinder are sequentially connected in series; and the first-stage subsystem, the second-stage subsystem and the third-stage subsystem are respectively connected with the main control module. The device is simple in structure, realizes rapid and accurate temperature control of the sampler, has stronger capability of resisting external temperature change interference, can ensure biological activity as much as possible, and ensures authenticity and credibility of biological detection data.

Description

Technical Field

[0001] The invention belongs to the technical field of heat preservation devices, and in particular relates to a three-level heat preservation system for a deep-sea sampler and a control method thereof. Background Art

[0002] Seabed biological sampling tools are essential technical means for conducting seabed environmental research, sampling and exploration of seabed biological resources. However, due to the special low-temperature environmental conditions of the seabed and the vertical distribution of ocean water temperature, generally within 100 meters of the ocean surface, due to the strong mixing of seawater caused by convection and wind and waves, the average surface water temperature is 17.4°C. In the water layer of 100 to 2000 meters, the water temperature drops sharply with increasing depth, and the vertical gradient of water temperature is large. Below 2000 meters until the seabed, the water temperature generally changes very little, often between 2 and 6°C, especially in the 2000-6000 meter depth zone, the water temperature is about 2°C.

[0003] The deep-sea samplers currently used cannot control the temperature of the organisms' original living environment well from sampling to experiment, resulting in the death of the collected seabed organisms during the process of returning from the seabed to the mother ship on the surface. This is very unfavorable for studying the species characteristics of seabed organisms. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a three-level insulation system and control method for a deep-sea sampler with a simple structure, easy operation, and the ability to ensure biological activity as much as possible, which is of great significance for maintaining the original structure and properties of organisms and ensures the authenticity and reliability of biological detection data.

[0005] The technical solution adopted by the present invention is: a three-level thermal insulation system for a deep-sea sampler, comprising a primary subsystem, a secondary subsystem, a tertiary subsystem and a main control module; The primary subsystem includes a heat preservation tube and a semiconductor cooling sheet I. The inner wall of the heat preservation tube is provided with a semiconductor cooling sheet I. The hot end of the semiconductor cooling sheet I is attached to the inner wall of the top of the heat preservation tube. A fan is installed at the cold end of the semiconductor cooling sheet I to quickly diffuse the cold air into the heat preservation tube. A temperature sensor I is provided in the heat preservation tube. The secondary subsystem includes a cold liquid cylinder and a semiconductor refrigeration sheet II; the cold liquid cylinder is installed in the heat preservation cylinder, the cold liquid cylinder is filled with cold liquid, the hot end of the semiconductor refrigeration sheet II is attached to the inner wall of the heat preservation cylinder, and the cold end of the semiconductor refrigeration sheet II is attached to the outer wall of the cold liquid cylinder; a temperature sensor II is arranged in the cold liquid cylinder; The three - level subsystem includes a circulation pump and a condenser tube; the water inlet of the cold liquid cylinder is connected to one end of the condenser tube in the sampler through a pipeline, and a temperature sensor III is installed in the sampler; the other end of the condenser tube is connected to the outlet of the circulation pump through a pipeline, and the inlet of the circulation pump is connected to the water outlet of the cold liquid cylinder through a pipeline; the semiconductor refrigeration sheet I, temperature sensor I, semiconductor refrigeration sheet II, temperature sensor II, temperature sensor III, fan and circulation pump are respectively connected to the main control module.

[0006] In the above - mentioned three - level heat - preservation system of the deep - sea sampler, the water outlet is arranged at the upper part of the cold liquid cylinder, and the water inlet is arranged at the lower part of the cold liquid cylinder.

[0007] In the above - mentioned three - level heat - preservation system of the deep - sea sampler, the main control module is installed in the heat - preservation cylinder.

[0008] The control method of the above - mentioned three - level heat - preservation system of the deep - sea sampler includes the following steps: Step 1: When the deep - sea sampler finishes sampling at the seabed, the main control module reads the value of the temperature sensor III, that is, the in - situ temperature of sampling at the seabed T w ; Step 2: During the recovery process of the sampler, the main control module reads the data of the temperature sensor III T c , the data of the temperature sensor I T a , the data of the temperature sensor II T b . When the temperature in the heat - preservation cylinder is higher than the in - situ temperature at the seabed, that is T a > T w , turn on the semiconductor refrigeration sheet I and the fan to keep the temperature of the air in the heat - preservation cylinder constant at T w ; When the temperature in the cold liquid cylinder is higher than the in - situ temperature at the seabed, that is T b > T w , turn on the semiconductor refrigeration sheet II to keep the temperature of the cold liquid in the cold liquid cylinder constant at T w ; When the temperature in the sampler is higher than the temperature of the cold liquid in the cold liquid cylinder, that is T c > T b ≥ T w , turn on the circulation pump, and the cold liquid conducts heat through the condenser tube to keep the temperature inside the sampler constant at T w .

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: The three - stage heat preservation system of the deep - sea sampler of the present invention has a simple structure. The air in the heat - preservation cylinder can not only prevent the temperature loss in the cold - liquid cylinder, realizing rapid and accurate temperature control of the sampler, but also has a stronger ability to resist the interference of external temperature changes during the process of recovering the deep - sea sampler from the seabed to the mother - ship deck; it can ensure the biological activity as much as possible, which is of great significance for maintaining the original structure and properties of organisms and ensuring the authenticity and reliability of biological detection data. The control method of the three - stage heat preservation system of the deep - sea sampler of the present invention is convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of the present invention.

[0011] Figure 2 is a structural block diagram of the main control module of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] As Figure 1 shown, the three - stage heat preservation system of the deep - sea sampler of the present invention includes a first - stage subsystem, a second - stage subsystem, a third - stage subsystem and a main control module 4.

[0014] The first - stage subsystem includes a heat - preservation cylinder 1 and a thermoelectric cooler I 12. The thermoelectric cooler I 12 is arranged on the inner wall of the heat - preservation cylinder 1. The hot end of the thermoelectric cooler I 12 is attached to the inner wall of the top of the heat - preservation cylinder 1, and the cold end of the thermoelectric cooler I 12 is installed with a fan 11 to quickly spread the cold air into the heat - preservation cylinder 1, realizing the temperature control of the air in the heat - preservation cylinder 1. A temperature sensor I 13 is arranged in the heat - preservation cylinder 1 for collecting the temperature of the air in the heat - preservation cylinder 1 in real time.

[0015] The second - stage subsystem includes a cold - liquid cylinder 2 and a thermoelectric cooler II 21; the cold - liquid cylinder 2 is installed in the heat - preservation cylinder 1, the cold - liquid cylinder 2 is filled with cold liquid, the hot end of the thermoelectric cooler II 21 is attached to the inner wall of the heat - preservation cylinder 1, and the cold end of the thermoelectric cooler II 21 is closely attached to the outer wall of the cold - liquid cylinder 2. A temperature sensor II 22 is arranged in the cold - liquid cylinder 2 for collecting the temperature of the cold liquid in the cold - liquid cylinder 2 in real time.

[0016] The described three - level subsystem includes a circulation pump 5 and a condenser tube 31; the water inlet of the cold liquid cylinder 2 is connected to one end of the condenser tube 31 in the sampler 3 through a pipeline, and a temperature sensor III 32 is installed in the sampler 3; the other end of the condenser tube 31 is connected to the outlet of the circulation pump 5, and the inlet of the circulation pump 5 is connected to the water outlet of the cold liquid cylinder 2 through a pipeline; the pipeline is made of high - pressure resistant pipe. The water outlet is arranged at the upper part of the cold liquid cylinder 2, and the water inlet is arranged at the lower part of the cold liquid cylinder 2. The semiconductor refrigeration sheet I 12, the temperature sensor I 13, the semiconductor refrigeration sheet II 21, the temperature sensor II 22, the temperature sensor III 32, the fan 11 and the circulation pump 5 are respectively connected to the main control module 4.

[0017] When designing the present invention, first, the volume of the cold liquid cylinder 2 is determined by the volume of the sampler 3, then the number of semiconductor refrigeration sheets II 21 and the power of the circulation pump 5 are determined according to the volume of the cold liquid cylinder 2. Secondly, the number of semiconductor refrigeration sheets I 12 is determined according to the volume of the heat preservation cylinder 1. Finally, the main control module 4 is designed according to the number of semiconductor refrigeration sheets II 21, the number of semiconductor refrigeration sheets I 12 and the total power, and a power supply with a suitable capacity is selected according to the working duration of the system.

[0018] As Figure 2 shown, the main control module is installed in the heat preservation cylinder. The main control module includes a power supply, a voltage conversion circuit, a fault protection circuit, a main controller, a drive circuit I, a drive circuit II and a drive circuit III. The power supply enables the system to work independently without relying on other devices, which is convenient to be carried on equipment that needs temperature control; the voltage conversion circuit converts the power supply voltage into the normal working voltage of each circuit of the module; the fault protection circuit monitors in real - time whether the working voltage and current of the main control module are abnormal, and disconnects the power supply when an abnormal situation occurs to protect the hardware device; the drive circuit I, the drive circuit II and the drive circuit III adjust the working states of the semiconductor refrigeration sheet I, the semiconductor refrigeration sheet II and the circulation pump according to the control signals of the main controller.

[0019] Since the deep - sea sampler generally works at a depth of several thousand meters, the time taken for lowering and sampling is relatively long. After the main control module 4 is powered on, the main controller is set to enter the low - power mode and wait for waking up to reduce the system power consumption and save the power supply.

[0020] The control method of the three - level heat preservation system of the deep - sea sampler of the present invention includes the following steps: Step 1: When the deep - sea sampler completes sampling at the seabed, after the main control module 4 receives the sealed action signal of the sampler closing, it wakes up the main controller and enters the normal working mode. At the same time, the main control module 4 reads the value of the temperature sensor III 32, that is, the in - situ temperature of seabed sampling T w ; Step 2: During the recovery process of the sampler 3, the main control module 4 reads the data of the temperature sensor III 32 in real - timeT c and the data of temperature sensor I13 T a and the data of temperature sensor II22 T b , when the temperature inside the heat preservation cylinder 1 is higher than the in-situ seabed temperature, that is T a > T w , turn on the semiconductor refrigerating sheet I12 and the fan 11 to keep the temperature of the air inside the heat preservation cylinder 1 constant at T w ; When the temperature inside the cold liquid cylinder 2 is higher than the in-situ seabed temperature, that is T b > T w , turn on the semiconductor refrigerating sheet II21 to keep the temperature of the cold liquid inside the cold liquid cylinder 2 constant at T w ; When the temperature inside the sampler 3 is higher than the temperature of the cold liquid inside the cold liquid cylinder 2, that is T c > T b ≥ T w , turn on the circulation pump 5, and the cold liquid conducts heat through the condenser tube 31 to keep the temperature inside the sampler 3 constant at T w .

Claims

1. A three-level insulation system for a deep-sea sampler, comprising a primary subsystem, a secondary subsystem, a tertiary subsystem and a main control module; characterized in that: The primary subsystem includes a heat preservation tube and a semiconductor cooling sheet I. The inner wall of the heat preservation tube is provided with a semiconductor cooling sheet I. The hot end of the semiconductor cooling sheet I is attached to the inner wall of the top of the heat preservation tube, and a fan is installed at the cold end of the semiconductor cooling sheet I to quickly diffuse the cold air into the heat preservation tube. A temperature sensor I is provided in the heat preservation cylinder; The secondary subsystem includes a cold liquid cylinder and a semiconductor refrigeration sheet II; the cold liquid cylinder is installed in the heat preservation cylinder, the cold liquid cylinder is filled with cold liquid, the hot end of the semiconductor refrigeration sheet II is attached to the inner wall of the heat preservation cylinder, and the cold end of the semiconductor refrigeration sheet II is attached to the outer wall of the cold liquid cylinder; a temperature sensor II is arranged in the cold liquid cylinder; The tertiary subsystem includes a circulation pump and a condenser; the water inlet of the cold liquid cylinder is connected to one end of the condenser in the sampler through a pipeline, and a temperature sensor III is installed in the sampler; the other end of the condenser is connected to the outlet of the circulation pump through a pipeline, and the inlet of the circulation pump is connected to the water outlet of the cold liquid cylinder through a pipeline; The semiconductor refrigeration piece I, the temperature sensor I, the semiconductor refrigeration piece II, the temperature sensor II, the temperature sensor III, the fan and the circulation pump are respectively connected to the main control module.

2. The three-stage thermal insulation system for deep-sea samplers according to claim 1 is characterized by: The water outlet is arranged at the upper part of the cooling liquid cylinder, and the water inlet is arranged at the lower part of the cooling liquid cylinder.

3. The three-stage thermal insulation system for deep-sea samplers according to claim 1 is characterized by: The main control module is installed in the heat preservation cylinder.

4. A method for controlling the three-stage insulation system of a deep-sea sampler according to any one of claims 1 to 3, comprising the following steps: Step 1: When the deep-sea sampler completes the seabed sampling, the main control module reads the value of the temperature sensor III, that is, the seabed sampling in-situ temperature T w ; Step 2: During the sampler recovery process, the main control module reads the data of temperature sensor III in real time T c , data from temperature sensor I T a , Temperature sensor II data T b , when the temperature inside the insulation tube is higher than the original temperature on the seabed, T a > T w When the semiconductor refrigeration plate I and the fan are turned on, the temperature of the air in the heat preservation cylinder is kept constant at T w ; When the temperature in the cold liquid cylinder is higher than the original temperature on the seabed, T b > T w When the semiconductor refrigeration plate II is turned on, the temperature of the cooling liquid in the cooling liquid cylinder is kept constant at T w ; When the temperature inside the sampler is higher than the temperature of the coolant in the coolant cylinder, T c > T b ≥ T w When the circulation pump is turned on, the cold liquid is conducted through the condenser to achieve a constant temperature inside the sampler. T w .

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