Combined liquid pool, liquid pool assembly and space evaporation phase change heat transfer scientific load system

Abstract

The application discloses a space evaporation phase change heat transfer scientific load system in the technical field of space evaporation heat transfer, and a liquid pool cavity of a combined liquid pool is sealed, wherein the combined liquid pool comprises a plurality of small droplet evaporation platforms, large droplet evaporation platforms and liquid layer evaporation platforms which are sequentially arranged along the length direction of the liquid pool and are fixedly installed at the bottom of the liquid pool cavity and are used for evaporation experiments; an evaporation observation assembly is installed in the liquid pool cavity of the combined liquid pool and is used for observing the evaporation process; the evaporation platform surfaces of the plurality of small droplet evaporation platforms are different in material and are used for small droplet evaporation experiments on different surfaces. The system comprises a pressure regulation and gas circulation system, a liquid injection and storage system and a liquid pool assembly, the pressure regulation and gas circulation system is used for supplying gas working medium to each liquid pool of the experiment, removing the working medium and impurities after the evaporation experiment and regulating the air pressure in the experimental liquid pool, and the liquid injection and storage system is used for injecting liquid into the plurality of liquid pools in the liquid pool assembly to form droplets or liquid layers.

Description

Technical Field

[0001] This invention relates to the field of space evaporation heat transfer technology, specifically to a combined liquid pool, a liquid pool assembly, and a space evaporation phase change heat transfer scientific payload system. Background Technology

[0002] The biggest difference between space science experiments and ground science experiments lies in the different environments they take place in. Under microgravity conditions, phenomena such as buoyancy convection, gravity settling, and liquid pressure gradients in fluids caused by the original ground gravity effect basically disappear. Some secondary effects masked by the ground gravity effect become prominent, and fluid morphology and physicochemical processes undergo significant changes, which will affect flow and heat transfer mechanisms, as well as the processing and preparation of related materials. At the same time, since some basic physics experiments are no longer affected by gravity, experiments can be carried out with higher indicators and precision, and important basic physics theories can be verified.

[0003] Evaporation and condensation are ubiquitous phenomena in nature, and their phase change heat transfer (heat transfer during liquid boiling and steam condensation) process is a classic problem that physics has long studied. For example, water evaporation and precipitation (condensation) are the basic guarantees for maintaining the human living environment on Earth. This cycle is greatly affected by natural (buoyancy) convection caused by gravity at every moment. On Earth, such evaporation and convection affect human production and life. For example, heat exchangers such as air conditioners and heat pipes are designed using the principle of phase change heat transfer.

[0004] The microgravity environment in spacecraft (such as manned space stations and satellites) lacks natural convection, which greatly affects the evaporation and condensation phase change processes. The working environment of thermal equipment will also be completely different from that on Earth. In order to study this difference, it is necessary to conduct scientific experiments on space evaporation and condensation phase change heat transfer in the microgravity environment. Through these experiments, we can study the special phenomena of space phase change heat transfer, understand its special laws, and then master new methods and technologies to overcome the adverse effects of space phase change heat transfer, so as to develop thermal equipment that can be well adapted to the space environment.

[0005] Because of the limited volume of space experimental devices, each experimental liquid pool needs to be equipped with a gas circuit and a liquid circuit. Therefore, the number of experimental liquid pools in existing space experimental devices is relatively small. Furthermore, due to the large number of experimental projects, multiple experiments are often carried out in a single experimental liquid pool. When changing experimental projects, the experimental observation device also needs to be adjusted, which delays the experimental process. Summary of the Invention

[0006] The purpose of this invention is to provide a combined liquid pool, a liquid pool assembly, and a space evaporation phase change heat transfer scientific payload system to solve the technical problems in the prior art where, due to the limited volume of space experimental devices, each experimental liquid pool needs to be equipped with a gas circuit and a liquid circuit, resulting in a small number of experimental liquid pools in existing space experimental devices; and due to the large number of experimental projects, often multiple experiments need to be carried out in one experimental liquid pool, and the experimental observation device needs to be adjusted when changing experimental projects, which delays the experimental process.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides a combined liquid pool, wherein the liquid pool cavity of the combined liquid pool is sealed, and the combined liquid pool includes multiple small droplet evaporation platforms, large droplet evaporation platforms and liquid layer evaporation platforms that are fixedly installed at the bottom of the liquid pool cavity and arranged sequentially along the length of the liquid pool for conducting evaporation experiments;

[0008] The combined liquid pool has an evaporation observation component installed inside its liquid pool cavity to observe the evaporation process.

[0009] The various droplet evaporation platforms have different evaporation platform materials, which are used to conduct evaporation experiments of small droplets on different platforms.

[0010] As a preferred embodiment of the present invention, the evaporation observation assembly includes an infrared observer and a laser interferometric topography measuring instrument installed on the top of the liquid pool cavity, and a high-definition CCD installed on the side of the liquid pool cavity.

[0011] As a preferred embodiment of the present invention, the plurality of small droplet evaporation stages are all mounted on a small stage base, and the small droplet evaporation stage includes a small stage heating device, a small stage base, a small stage heat flow sensor and a small stage evaporation substrate arranged sequentially along the direction away from the small stage base;

[0012] The small platform heat flow sensor, the small platform evaporation substrate, and the upper end of the small platform base are all provided with concentric droplet holes. The small platform base is also provided with a small platform base connection hole that communicates with the droplet holes. The small platform base connection hole is connected to the liquid injection mechanism through the small platform connector to form droplets on the small platform evaporation substrate.

[0013] The small stage base is also provided with a small stage base test hole, and a small stage temperature sensor is installed in the small stage base test hole to measure the surface temperature of the vapor generated during the droplet evaporation process, thereby reflecting the influence of evaporation effect and thermocapillary convection on the internal heat transfer characteristics of the droplet; the small stage heat flow sensor is used to accurately measure the heat flow change at the bottom of the droplet to reflect the influence of evaporation effect and thermocapillary convection on the internal heat transfer characteristics of the droplet; the small stage heating device is used to provide heat to the evaporation stage to ensure that the droplet in evaporation is at a fixed temperature or within a predetermined temperature variation range.

[0014] The small platform base is also fixedly installed with a small platform support for supporting the small platform heat flow sensor.

[0015] As a preferred embodiment of the present invention, the small platform base and the small platform heat flow sensor are covered with a small platform heat insulation layer, which is used to isolate the temperature of the small platform base to avoid interfering with the evaporation of droplets.

[0016] The small platform insulation layer has a notch in the middle for placing the small platform evaporation base, and the upper surface of the small platform insulation layer is flush with the upper surface of the small platform evaporation base.

[0017] As a preferred embodiment of the present invention, the large droplet evaporation stage is mounted on a large stage base, and the large droplet evaporation stage includes a large stage base, a large stage internal sensor and a large stage evaporation substrate arranged sequentially along the direction away from the large stage base;

[0018] Concentric droplet holes are provided on the upper end of the large platform base, the sensor inside the large platform, and the evaporation substrate of the large platform. The large platform base is also provided with a large platform base connection hole that communicates with the droplet holes. The large platform base connection hole is connected to the liquid injection mechanism through the large platform connector to form droplets on the evaporation substrate of the large platform.

[0019] The diameter of the droplet holes on the large-platform evaporation substrate is larger than that on the small-platform evaporation substrate, and the upper surface of the large-platform evaporation substrate is provided with an annular droplet groove concentric with the droplet holes to limit the size and position of the droplets.

[0020] The large platform base and the sensor inside the large platform are covered with a large platform heat insulation layer, which is used to isolate the temperature of the large platform base to avoid interfering with the evaporation of droplets.

[0021] The heat insulation layer of the large platform has a notch in the middle for placing the evaporation base of the large platform, and the upper surface of the heat insulation layer of the large platform is flush with the upper surface of the evaporation base of the large platform.

[0022] The large platform base is also equipped with a large platform support, the upper surface of which abuts against the lower surface of the sensor inside the large platform.

[0023] As a preferred embodiment of the present invention, a temperature control device is provided on the side of the large platform base away from the large platform base. The temperature control device is used to make the large droplet evaporation platform reach a predetermined temperature or a predetermined heating / cooling rate during the droplet evaporation process.

[0024] As a preferred embodiment of the present invention, the large platform insulation layer is further provided with a large platform test upper hole and a large platform test lower hole that penetrate the large platform insulation layer laterally. Both the large platform test upper hole and the large platform test lower hole are provided with a large platform external sensor. The large platform external sensor is used to measure the steam temperature, the cooling or heating temperature of the temperature control device, and the steam heat flow.

[0025] As a preferred embodiment of the present invention, the liquid layer evaporation stage is mounted on a liquid layer stage base, and the liquid layer evaporation stage includes a liquid layer stage base, a liquid layer stage internal sensor and a liquid layer stage evaporation substrate arranged sequentially along the direction away from the liquid layer stage base.

[0026] The upper end of the liquid stage base, the sensor inside the liquid stage, and the evaporation substrate of the liquid stage are all provided with concentric droplet holes. The liquid stage base is also provided with a liquid stage base connection hole that communicates with the droplet holes. The liquid stage base connection hole is connected to the liquid injection mechanism through the liquid stage connector to form droplets on the evaporation substrate of the liquid stage.

[0027] The upper surface of the liquid layer evaporation substrate is provided with an annular droplet ring concentric with the droplet orifice to prevent the liquid layer from flowing out.

[0028] The present invention further provides a liquid pool assembly, including a second experimental liquid pool, a third experimental liquid pool and the above-mentioned combined liquid pool installed in a space experimental chamber, and the liquid pool cavity of each liquid pool is sealed.

[0029] The second experimental liquid pool includes a second evaporation stage fixedly installed inside the liquid pool cavity and a gas phase density observation component for observing the gas phase density during the droplet evaporation process.

[0030] The third experimental liquid pool includes a third evaporation platform fixedly installed in the liquid pool cavity and a temperature measuring component for measuring the temperature of the gas-liquid interface during the evaporation process.

[0031] The second and third evaporation stages have the same structure as the large droplet evaporation stage.

[0032] As a preferred embodiment of the present invention, the gas phase density observation component includes an infrared observer installed on the top of the liquid pool cavity and a density optical measuring instrument installed on the side.

[0033] The temperature measuring component includes a high-definition CCD and a thermocouple array installed inside the liquid pool cavity.

[0034] The present invention further provides a space evaporation phase change heat transfer scientific payload system, including a pressure regulation and gas circulation system, a liquid injection and storage system, and the above-mentioned liquid pool assembly. The pressure regulation and gas circulation system is used to supply gaseous working fluid to each liquid pool in the experiment, remove working fluid and impurities after the evaporation experiment, and regulate the gas pressure in the experimental liquid pool. The liquid injection and storage system is used to inject liquid into multiple liquid pools in the liquid pool assembly to form droplets or liquid layers.

[0035] As a preferred embodiment of the present invention, the pressure regulation and gas circulation system includes a gas management module, a first disconnector, a first solenoid valve, a liquid pool assembly, a second solenoid valve, and a second disconnector, which are sequentially connected and form a closed loop.

[0036] The first solenoid valve is a one-inlet, multiple-outlet solenoid valve, and is connected to the three liquid pools in the liquid pool assembly through a main air inlet pipe and three branch air inlet pipes respectively. The second solenoid valve is a multiple-inlet, one-outlet solenoid valve, and is connected to the three liquid pools in the liquid pool assembly through a main air outlet pipe and three branch air outlet pipes respectively.

[0037] The gas management module is used to input the working gas required for the evaporation experiment into the three liquid pools, and to remove the working gas and impurities generated during the experiment after the evaporation experiment.

[0038] The first solenoid valve can control the three branch inlet pipes to open simultaneously or individually, so as to supply gaseous working fluid to the three experimental liquid pools simultaneously or at different times. The second solenoid valve can control the three outlet pipes to open simultaneously or individually, so as to discharge impurities and working fluid from the three experimental liquid pools simultaneously or at different times.

[0039] As a preferred embodiment of the present invention, the main intake pipe includes two sections of pipe, the end of the bypass pipe is connected to the two sections of pipe by a T-joint, the other end of the bypass pipe is connected to a third solenoid valve, and the third solenoid valve is connected to the gas management module.

[0040] Pressure sensors for detecting the pressure inside the liquid tank cavity are installed in the combined liquid tank, the second experimental liquid tank, and the third experimental liquid tank.

[0041] In a preferred embodiment of the present invention, the liquid injection and storage system includes a liquid accumulator and a front dispensing valve. The liquid accumulator and the front dispensing valve are connected by a supply pipe. A supply pipe valve and a supply pipe pressure sensor are installed on the supply pipe. The front dispensing valve is connected to a combined liquid injection mechanism and an experimental liquid injection mechanism through a combined front injection pipe and an experimental pre-injection pipe, respectively. The combined liquid injection mechanism is connected to a combined rear dispensing valve through a combined middle injection pipe. The combined rear dispensing valve is connected to each evaporation platform in the combined liquid pool through multiple combined rear injection pipes. The experimental liquid injection mechanism is connected to an experimental rear dispensing valve through an experimental middle injection pipe. The experimental rear dispensing valve is connected to the evaporation platforms in the second and third experimental liquid pools through two experimental rear injection pipes, respectively.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] Through the coordination of the liquid injection and storage system, pressure regulation and gas circulation system, and liquid pool components, a liquid reservoir in the liquid injection and storage system supplies liquid to two injection mechanisms through a pre-dispensing valve with one inlet and two outlets. The two injection mechanisms supply liquid to multiple evaporation platforms through a combined post-dispensing valve with one inlet and multiple outlets and an experimental post-dispensing valve with one inlet and multiple outlets, forming droplets / liquid layers for evaporation experiments. In the pressure regulation and gas circulation system, through the coordination of a first solenoid valve with one inlet and multiple outlets and a second solenoid valve with multiple inlets and one outlet, a gas management module supplies gaseous working fluid to multiple experimental liquid pools. The entire space evaporation phase change heat transfer scientific payload system has a simplified structure, which can meet the space requirements of the space experimental device while setting up more evaporation platforms, enabling more experiments to be carried out simultaneously, and achieving high experimental efficiency. Attached Figure Description

[0044] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the internal structure of the combined liquid tank in an embodiment of the present invention;

[0046] Figure 2 This is an exploded view of the small droplet evaporation platform in an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the structure of the large droplet evaporation platform in an embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of the temperature control device in an embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of the structure of the liquid layer evaporation stage in an embodiment of the present invention;

[0050] Figure 6 This is a schematic diagram of the space evaporation phase change heat transfer scientific payload system in an embodiment of the present invention. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] This embodiment provides a combined liquid pool 1, which can be a scientific experimental device for space evaporation and condensation phase change heat transfer. The scientific experiment on space evaporation and condensation phase change heat transfer takes droplets or liquid layers as the research object. Under microgravity, various experimental instruments are used to observe the evaporation process of droplets or liquid layers on the evaporation platform, and various evaporation heat transfer experimental data and images are obtained. It is hoped that new knowledge and results can be obtained in the theoretical research on the basic laws of heat and mass transfer at the gas-liquid interface and the stability of the evaporation interface, so as to provide a basis for the development of space phase change heat transfer equipment.

[0053] The combined liquid tank 1 provided in this embodiment includes a liquid tank body, which includes a top plate (not shown in the figure) and a bottom plate 002 arranged opposite to each other. A side plate 003 is connected between the top plate and the bottom plate 002. The side plate 003 includes a front side plate 0031, a left side plate 0032, a rear side plate 0033, and a right side plate 0034 connected end to end in sequence. The top plate and the bottom plate 002 are parallel to each other. The front side plate 0031 and the rear side plate 0033 are arranged opposite to each other and are parallel to each other. The left side plate 0032 and the right side plate 0034 are arranged opposite to each other and are parallel to each other. The liquid pool body is formed by the enclosure between plate 002, front side plate 0031, left side plate 0032, rear side plate 0033 and right side plate 0034. The liquid pool body can be approximately a cuboid structure. The material of the liquid pool body can be metal, including but not limited to aluminum-magnesium alloy or aluminum alloy. Aluminum-magnesium alloy has the advantages of being lightweight, having high tensile strength, good load-bearing capacity and high dimensional stability. Aluminum alloy has the advantages of being lightweight, having high strength, good corrosion resistance, good processing performance and easy regeneration. The materials that can be selected for the liquid pool body are not limited to these, and are not limited here.

[0054] The envelope size of the combined liquid tank 1 does not exceed 359mm × 150mm × 92mm, and the inner cavity size is not less than 302mm × 102mm × 62mm. This design ensures that the main body of the liquid tank has sufficient inner cavity space while allowing the entire liquid tank to occupy a smaller space, thereby improving the space utilization rate of the liquid tank main body. The wall thickness of the top plate, bottom plate 002, front side plate 0031, left side plate 0032, rear side plate 0033, and right side plate 0034 is not less than 3mm. If the wall thickness is too small, the structural strength of the liquid tank main body will be insufficient, and it will be easily damaged when the combined liquid tank 1 is taken into space or when it is subjected to vacuuming, pressurization, or other operations. The faulty combined liquid pool 1 makes it impossible to conduct scientific experiments on spatial evaporation and condensation phase change heat transfer smoothly. If the wall thickness is too large, the internal cavity size of the combined liquid pool 1 will decrease when the envelope size remains unchanged, resulting in insufficient internal space for the combined liquid pool 1 to accommodate various equipment used in evaporation experiments. Specifically, the wall thicknesses of the top plate, bottom plate 002, front side plate 0031, left side plate 0032, rear side plate 0033, and right side plate 0034 can be 3mm, 3.5mm, 4mm, 4.5mm, or 5mm. It should be noted that the envelope size refers to the maximum external dimensions of the item, that is, the size of the box required to place the item in the smallest possible box.

[0055] The top plate, bottom plate 002, front side plate 0031, left side plate 0032, rear side plate 0033, and right side plate 0034 form a receiving cavity 000. The receiving cavity 000 is used to accommodate various equipment for evaporation experiments. It can be understood that the main body of the liquid pool is a hollow structure. The arrangement of the main body of the liquid pool allows the combined liquid pool 1 to be assembled into a whole structure. An evaporation platform 1 is arranged inside the main body of the liquid pool. The evaporation platform 1 includes a small droplet evaporation platform 11, a large droplet evaporation platform 12, and a liquid layer evaporation platform arranged sequentially along the length X of the main body of the liquid pool. Evaporation platform 13, small droplet evaporation platform 11 is located on the side of large droplet evaporation platform 12 near the left side plate 0032, liquid layer evaporation platform 13 is located on the side of large droplet evaporation platform 12 near the right side plate 0034, small droplet evaporation platform 11, large droplet evaporation platform 12 and liquid layer evaporation platform 13 are all located on the bottom plate 002 near the top plate, the number of small droplet evaporation platforms 11 is at least two, small droplet evaporation platforms 11 can be used to study the evaporation process of droplets with diameter of 2mm-5mm, large droplet evaporation platform 12 can be used to study the evaporation process of droplets with diameter of 5mm-1... The evaporation process of 0mm droplets, the liquid layer evaporation stage 13 can be used to study the evaporation process of liquid layers with a thickness of no more than 2mm; it should be noted that: (1) the diameter of the droplets studied by the small droplet evaporation stage 11, the diameter of the droplets studied by the large droplet evaporation stage 12, and the thickness of the liquid layer studied by the liquid layer evaporation stage 13 can all be set according to the requirements of subsequent space evaporation and condensation phase change heat transfer scientific experiments. Therefore, they can all be adjusted according to the actual situation. This does not constitute a limitation on the size of the droplets and liquid layers; (2) during the experiment, if the diameter of the droplets and the thickness of the liquid layers are too small, the evaporation rate of the droplets and liquid layers is too fast, and the morphological changes of the droplets and liquid layers cannot be observed in time, and experimental data cannot be obtained. If the diameter of the droplets and the thickness of the liquid layers are too large, the evaporation rate of the droplets and liquid layers is too slow, and the thermocapillary convection (when there is a temperature gradient on the gas-liquid interface, the surface tension distribution on the gas-liquid interface will be uneven, thereby causing the liquid around the interface to undergo surface tension driven flow) phenomenon is not obvious. The morphological changes of the droplets and liquid layers cannot be observed, and the reaction time will be wasted.

[0056] Along the height Y direction of the liquid pool body, the small droplet evaporation stage 11 includes a small stage evaporation base 111, a small stage heat flow sensor 112, a small stage base 113, and a small stage heating device 114 connected in sequence. The side of the small stage heating device 114 away from the small stage base 113 is connected to the small stage base 110, and the side of the small stage base 110 away from the small stage heating device 114 is connected to the base plate 002. The small droplet evaporation stage 11 can be fixedly connected to the base plate 002 through the small stage base 110. The small stage evaporation base 111 has a small stage evaporation device 111 connected to the base plate 002. A base hole 1110 is provided, which penetrates the evaporation base 111 along the height Y direction of the liquid pool body. A sensing hole 1120 is provided on the heat flow sensor 112, which penetrates the heat flow sensor 112 along the height Y direction of the liquid pool body. A base hole 113 is provided on the base 113, which includes a base hole 1131, a base test hole 1132, and a base connection hole 1133. The base hole 1131 penetrates part of the base 113 along the height Y direction of the liquid pool body. 13. The test hole 1132 of the small platform base extends through part of the small platform base 113 along the length X direction of the liquid pool body. The connecting hole 1133 of the small platform base extends through part of the small platform base 113 along the thickness Z direction of the front side plate 0031. The small platform base hole 1131 and the connecting hole 1133 of the small platform base are connected, but the small platform base hole 1131 and the test hole 1132 of the small platform base are not connected. The small platform connector 115 is inserted into the connecting hole 1133 of the small platform base. The small platform connector 115 is located on the side of the small platform base 113 closer to the front side plate 0031. The head 115 is used to connect to the liquid injection mechanism (not shown in the figure) outside the combined liquid pool 1. When the liquid injection mechanism provides liquid to the small droplet evaporation platform 11, the liquid passes through the small platform connector 115, the small platform base connection hole 1133, the small platform base hole 1131, the small platform sensing hole 1120 and the small platform evaporation base hole 1110 in sequence, and finally forms a droplet on the small platform evaporation base 111. The small platform heat flow sensor 112 is used to accurately measure the change of heat flow at the bottom of the droplet, reflecting the influence of evaporation effect and thermocapillary convection on the heat transfer characteristics inside the droplet.

[0057] The small stage heating device 114 provides heat to the small droplet evaporation stage 11, ensuring that the evaporation process of the droplets is within a fixed temperature or a certain temperature variation range. The small stage insulation layer 116 is fastened to the small stage evaporation base 111, part of the small stage heat flow sensor 112, and the small stage base 113. Part of the small stage evaporation base 111 is exposed outside the small stage insulation layer 116. Along the height direction Y of the liquid pool body, the upper surface of the small stage evaporation base 111 is flush with the upper surface of the small stage insulation layer 116. The small stage insulation layer 116 is used to insulate the temperature of the small stage base 113, preventing the droplets from being affected. The evaporation process generates temperature interference, but it also serves as a heat preservation function. A small platform insulation layer 116 has a connecting hole 1161, which extends along the height Y direction of the liquid pool body through the insulation layer 116. The connecting hole 1161 is connected to the test hole 1132 on the platform base. Some small platform temperature sensors (not shown in the figure) pass through the connecting hole 1161 and the connecting hole 1132 in sequence, while others are located outside the connecting hole 1161. The small platform temperature sensors are used to measure the droplet temperature. The surface temperature of the steam generated during evaporation reflects the influence of evaporation and thermocapillary convection on the internal heat transfer characteristics of the droplets. A small stage support 1101 is provided on the small stage base 110 to support part of the small stage heat flow sensor 112, preventing it from falling off the small droplet evaporation stage 11. The small stage heat flow sensor 112 can be of model HS-20C-0.7, and the small stage temperature sensor can be of model HS-10C-0.7. The small stage heating device 114 can be a thin-film heating element. The model number can be M168-1-43. To ensure the structural strength of the small droplet evaporation platform 11 and its ability to transfer temperature, the main body material of the small droplet evaporation platform 11 can be a metal material, including but not limited to copper or aluminum. Metal materials have certain strength and thermal conductivity. In order to avoid heat loss, the material of the small platform insulation layer 116 can be polytetrafluoroethylene (PTFE), which has excellent chemical stability, corrosion resistance, sealing performance, high lubricity and non-stickiness, electrical insulation and good anti-aging resistance. The material of each structure on the small droplet evaporation platform 11 is not limited here.

[0058] In this embodiment, the number of small droplet evaporation platforms 11 can be five. These five platforms are arranged sequentially along the length (X) of the liquid pool body. The difference between the five platforms lies in the material of their evaporation substrates 111. This arrangement allows for droplet evaporation experiments on different material surfaces within a single combined liquid pool 1. The materials of the evaporation substrates 111 include, but are not limited to, silver, polytetrafluoroethylene (PTFE), polymethyl methacrylate (PMMA), silicon, or graphite. During the experiment, the five platforms 11 can be used simultaneously or sequentially. Regarding the small droplets... The number of evaporation platforms 11 and the material of the small platform evaporation substrate 111 can be adjusted according to the actual situation, and are not limited here. In addition, in this embodiment, the number of small platform heating devices 114 is the same as the number of small droplet evaporation platforms 11. In other embodiments, the number of small platform heating devices can be reduced. For example, at least two small droplet evaporation platforms 11 can share a small platform heating device 114. As long as it can be ensured that each small droplet evaporation platform 11 has a small platform heating device 114 to heat it, the number of small platform heating devices 114 can be adjusted according to the actual situation, and are not limited here.

[0059] Along the height Y direction of the liquid pool body, the large droplet evaporation platform 12 includes a large platform evaporation base 121, a large platform insulation layer 122, a large platform base 123, and a large platform base 124 connected in sequence. The large platform base 124 is located on the side of the large platform base 123 near the bottom plate 002. A droplet hole 1211 is formed on the large platform evaporation base 121, penetrating the large platform evaporation base 121 along the height Y direction of the liquid pool body. The droplet hole 1211 is used to form droplets. The diameter of the droplet hole 1211 can be in the range of 0.3mm-0.7mm. If the diameter of the droplet hole 1211 is too small, the droplet hole 1211 will not be able to hold the droplets. The clogging makes it impossible to conduct the droplet evaporation experiment. If the diameter of the droplet orifice 1211 is too large, it will affect the contact between the droplet and the evaporation base 121 of the large platform, causing interference in the evaporation experiment and affecting the accuracy of the experimental results. At least one droplet groove 1212 is provided around the periphery of the droplet orifice 1211. The droplet orifice 1211 and the droplet groove 1212 are not connected. The droplet groove 1212 penetrates part of the evaporation base 121 of the large platform along the height direction Y of the liquid pool body. The droplet groove 1212 is an annular groove. The droplet orifice 1211 and the droplet groove 1212 are concentric. By setting the droplet groove 1212, the size and position of the droplet can be limited.

[0060] The large platform insulation layer 122 is fastened to the large platform evaporation base 121. The large platform insulation layer 122 has a large platform insulation connection hole 1221, which penetrates the large platform insulation layer 122 along the height direction Y of the liquid pool body. The large platform insulation layer 122 also has a large platform test hole 1222, which penetrates the large platform insulation layer 122 along the thickness direction of the large platform insulation layer 122. The large platform insulation layer 122 can prevent heat loss and play a heat preservation role. Its material can be PTFE.

[0061] Along the height Y direction of the liquid pool body, a large platform internal sensor 125 is installed between the large platform evaporation base 121 and the large platform insulation layer 122. The large platform internal sensor 125 has a thin sheet structure, and part of the large platform internal sensor 125 is snapped between the large platform evaporation base 121 and the large platform insulation layer 122. The large platform internal sensor 125 has a large platform sensor hole (not shown in the figure), which passes through the large platform internal sensor 125 along the height Y direction of the liquid pool body. The large platform sensor hole is connected to the droplet hole 1211. The large platform internal sensor 125 can be a heat flow sensor. The large platform internal sensor 125 is used to accurately measure the change of heat flow at the bottom of the droplet, reflecting the influence of evaporation effect and thermocapillary convection on the heat transfer characteristics inside the droplet. Part of the large platform internal sensor 125 is used to connect to the control device and power supply outside the combined liquid pool 1.

[0062] The platform base 123 includes an upper platform base 1231 and a lower platform base 1232 connected to the upper platform base 1231. The upper platform base 1231 is located on the side of the lower platform base 1232 closer to the platform insulation layer 122. Both the upper platform base 1231 and the lower platform base 1232 are cylindrical structures. The bottom radius of the upper platform base 1231 is smaller than the bottom radius of the lower platform base 1232. The side of the upper platform base 1231 away from the lower platform base 1232 is connected to the platform insulation layer 122. The upper platform base 1231 and the platform insulation layer 122 form a platform test lower hole 1200.

[0063] The large platform connector 126 passes through the large platform base 1231. The large platform connector 126 is connected to the large platform sensor hole and the droplet hole 1211. The extension direction of the large platform connector 126 forms an angle with the thickness direction Z of the front side plate 0031, and the angle is less than 90°. The large platform connector 126 is used to connect with the liquid injection mechanism. When the liquid injection mechanism provides liquid to the large droplet evaporation platform 12, the liquid passes through the large platform connector 126, the large platform sensor hole and the droplet hole 1211 in sequence, and finally forms a droplet on the large platform evaporation base 121.

[0064] The large droplet evaporation stage 12 also includes a large stage support 127, which includes an upper support base 1271 and a lower support base 1272 connected to the upper support base 1271. Both the upper support base 1271 and the lower support base 1272 are cubic structures. The upper surface of the upper support base 1271 away from the lower support base 1272 abuts against the lower surface of the sensor 125 inside the stage away from the evaporation substrate 121. The large stage support 127 can support the sensor 125 inside the stage, thereby preventing the sensor 125 inside the stage from falling off the large droplet evaporation stage 12.

[0065] A temperature control device 128 is installed on the side of the large platform base 124 away from the large platform base 123. The temperature control device 128 is located outside the main body of the liquid pool. The temperature control device 128 includes a temperature regulating device 1281 and a heat dissipation device 1282 connected to the temperature regulating device 1281. The temperature regulating device 1281 is located on the side of the heat dissipation device 1282 closer to the large platform base 124, along the height direction Y of the main body of the liquid pool. The orthographic projection of the temperature regulating device 1281 and the orthographic projection of the heat dissipation device 1282 at least partially overlap. The temperature regulating device 1281 abuts against the large platform base 124 and is snapped or glued to the heat dissipation device 1282. The heat dissipation device 1282 has a heat dissipation device mounting hole 12821, which is located along the main body of the liquid pool. A heat dissipation device 1282 extends along the height Y direction and passes through the mounting hole 12821 of the heat dissipation device with screws (not shown in the figure), allowing the heat dissipation device 1282 to be fixedly connected to the base plate 002. The temperature control device 1281 is used to change the temperature of the large droplet evaporation platform 12 during droplet evaporation, ensuring that the large droplet evaporation platform 12 reaches a predetermined temperature or a predetermined heating / cooling rate. This guarantees that the droplets on the large droplet evaporation platform 12 can evaporate within a fixed temperature range, a certain heating range, or a certain cooling range. When conducting experiments where the evaporation temperature is lower than the internal ambient temperature of the combined liquid pool 1 (typically 21.5℃-22℃), the temperature control device 1281 can be a semiconductor cooler (TEC), with models II-VI. The MARLOW XLT12-6-01LS TEC can both heat and cool, and has a wider temperature control range. When conducting evaporation experiments where the temperature is not lower than the internal ambient temperature of the combined liquid tank 1, the temperature control device 1281 can be a heating element, which can perform the heating function. The volume of the TEC is usually larger than that of the heating element. The choice of which type of temperature control device 1281 to use needs to be adapted according to the experimental requirements and the actual situation such as the internal ambient temperature of the combined liquid tank 1, and is not limited here. The heat dissipation device 1282 is used to connect to the flow working medium module (not shown in the figure) outside the combined liquid tank 1. The flow working medium module is used to provide flowing working medium to the interior of the heat dissipation device 1282. The flow working medium module and the temperature control device 1281 exchange heat through the heat dissipation device 1282, so the heat dissipation device 1282 can dissipate heat from the temperature control device 1281. The heat dissipation device 1282 can be a microchannel heat exchanger, and its model is not limited.

[0066] Combination Figure 1 , Figure 4As shown, in this embodiment, there can be two temperature control devices 1281 and one heat dissipation device 1282. The two temperature control devices 1281 are arranged along the length direction X of the liquid pool body. One temperature control device 1281 corresponds to the large droplet evaporation platform 12 and is used to adjust the temperature of the large droplet evaporation platform 12. The other temperature control device 1281 corresponds to the liquid layer evaporation platform 13 and is used to adjust the temperature of the liquid layer evaporation platform 13.

[0067] Several external sensors (not shown in the figure) are also installed on the large droplet evaporation stage 12. One external sensor can be installed in the upper test hole 1222 of the stage, and another external sensor can be installed in the lower test hole 1200 of the stage. The positions of the other external sensors are not limited here. By setting multiple external sensors, multiple physical parameters related to the droplet evaporation process, such as steam temperature, cooling or heating temperature of the temperature control device 1281, and steam heat flow, can be measured. This provides a basis for controlling the large droplet evaporation stage 12 to conduct experiments and provides various reaction data for recording the experimental process and results. The external sensors can be thermocouples, with a model of 5TC-TT-T-36-36. The external sensors can accurately measure the temperature at different positions of the droplet and can reflect the influence of evaporation effect and thermocapillary convection on the internal heat transfer characteristics of the droplet. The temperature data measured by the external sensors can be used to invert the change of heat transfer coefficient during the evaporation experiment.

[0068] The structure of the liquid layer evaporation stage 13 is basically the same as that of the large droplet evaporation stage 12. The liquid layer evaporation stage 13 includes a liquid layer evaporation base 131, a liquid layer insulation layer 132, a liquid layer base 133, and a liquid layer seat 134 connected sequentially along the height direction Y of the liquid pool body. A liquid layer sensor 135 is provided between the liquid layer evaporation base 131 and the liquid layer insulation layer 132. The liquid layer connector 136 is inserted into the liquid layer base 133. The liquid layer support 137 supports the liquid layer sensor 135. The small structures within each structure, the connection methods between various structures, and the working principle of the liquid layer evaporation stage 13 are also basically the same as those in the large droplet evaporation stage 12, and will not be described in detail here.

[0069] The differences between the liquid layer evaporation stage 13 and the large droplet evaporation stage 12 are as follows: (1) The liquid layer evaporation stage 13 is used for liquid layer evaporation experiments, while the large droplet evaporation stage 12 is used for droplet evaporation experiments; (2) The structure of the liquid layer evaporation base 131 is different from that of the large droplet evaporation base 121. The liquid layer evaporation base 131 includes a liquid layer evaporation base plane 131a, which is a circular plane. A liquid layer evaporation base side 131b (i.e., droplet ring) is provided around part of the periphery of the liquid layer evaporation base plane 131a. The liquid layer evaporation base side 131b is located on the side of the liquid layer evaporation base plane 131a away from the liquid layer base 133. A liquid layer hole 1311 is opened on the liquid layer evaporation base plane 131a. 11. A liquid layer hole 1311 penetrates the evaporation substrate plane 131a along the height direction Y of the liquid pool body. The liquid layer hole 1311 is used to form a liquid layer. If the diameter of the liquid layer hole 1311 is too small, the liquid layer hole 1311 is easily blocked, making it impossible to carry out the liquid layer evaporation experiment. If the diameter of the liquid layer hole 1311 is too large, it will affect the contact between the liquid layer and the liquid layer evaporation substrate 131, causing interference in the evaporation experiment and affecting the accuracy of the experimental results. Optionally, the diameter range of the liquid layer hole 1311 is 0.1mm-0.8mm. The side surface 131b of the liquid layer evaporation substrate is a ring structure. The liquid layer hole 1311 and the side surface 131b of the liquid layer evaporation substrate are concentric. By setting the side surface 131b of the liquid layer evaporation substrate, the liquid layer can be prevented from flowing out of the liquid layer evaporation substrate plane 131a.

[0070] The combined liquid pool 1 provided in this embodiment can support various observation methods, including but not limited to laser interferometric topography observation. When the combined liquid pool 1 provided in this embodiment is carried out in space for experiments, ground personnel can control the operation of the monitoring device and adjust its position through the monitoring station. The monitoring device includes, but is not limited to, an infrared thermal imager and a high-definition camera (CCD). The infrared thermal imager and the high-definition camera can collect images, temperature data, and heat flow data inside the combined liquid pool 1 through the top and side windows. Both the infrared thermal imager and the high-definition camera can be electrically connected to the data acquisition system (not shown in the figure) outside the combined liquid pool 1. The data acquisition system transmits all the collected data to the ground for subsequent analysis and processing by the experimental personnel. Whether the monitoring device is working and the position adjustment of the monitoring device during the experiment can be controlled by ground personnel, which will not be elaborated here.

[0071] A rear hole (not shown in the figure) is provided on the rear side plate 0033. The rear hole passes through the rear side plate 0033 along the thickness direction Z of the front side plate 0031. The rear socket (not shown in the figure) is inserted into the rear hole and fixedly connected to the rear side plate 0033. Along the thickness direction Z of the front side plate 0031, the orthographic projection of the rear socket does not overlap with the orthographic projections of the small droplet evaporation stage 11, the large droplet evaporation stage 12, and the liquid layer evaporation stage 13. The rear socket is far away from the receiving cavity 00. A rear plug (not shown in the figure) is connected to one side of the base plate 002. A bottom hole 0021 is provided on the base plate 002, which penetrates the base plate 002 along the height direction Y of the liquid pool body. A bottom socket (not shown in the figure) is embedded in the bottom hole 002 and fixedly connected to the base plate 002. Along the height direction Y of the liquid pool body, the orthographic projection of the bottom socket does not overlap with the orthographic projection of the small droplet evaporation stage 11, the large droplet evaporation stage 12, or the liquid layer evaporation stage 13. A bottom plug (not shown in the figure) is connected to the side of the socket away from the receiving cavity 000. The ends of the rear plug and the bottom plug away from the combined liquid tank 100 are used to connect to the power supply and control device. The rear socket and the bottom socket are connected to all the devices in the combined liquid tank 1 that require power supply and signal acquisition through wires (not shown in the figure). The devices that require power supply and signal acquisition include, but are not limited to, the small platform heat flow sensor 112, the small platform heating device 114, the large platform internal sensor 125, the large platform external sensor, and the liquid layer platform internal sensor 135. The rear socket and the rear plug cooperate with each other, and the bottom socket and the bottom plug cooperate with each other, all of which serve to provide power supply, signal acquisition, and control the electrical structure inside the combined liquid tank 1. Both the rear socket and the bottom socket can be vacuum sockets, and the selectable model includes Y27-2255ZJB1H. Both the rear plug and the bottom plug can be vacuum plugs, and the selectable model includes Y27-2255TK1L.

[0072] A background light source is provided on the rear side plate 0033 near the front side plate 0031. The background light source can be fixedly connected to the rear side plate 0033 by screws or welding, which is not limited here. Along the length direction X of the liquid pool body, the background light source includes a left background light source 61 and a right background light source 62 arranged in sequence. The left background light source 61 is located on the side of the right background light source 62 near the left side plate 0032. The rear hole is located between the left background light source 61 and the right background light source 62. Along the thickness direction Z of the front side plate 0031, the orthographic projection of the left background light source 61 overlaps at least partially with the orthographic projection of all the small droplet evaporation platforms 11, and the orthographic projection of the right background light source 62 overlaps with the orthographic projection of the large droplet evaporation platform 12 and the liquid layer evaporation platform. The orthographic projections of 13 overlap at least partially. The background light source 6 can be electrically connected to the control device and the power supply. The left background light source 61 is used to illuminate all the small droplet evaporation stages 11 to assist in observing the morphological changes and temperature distribution of the droplet evaporation process on each small droplet evaporation stage 11. The right background light source 62 is used to illuminate the large droplet evaporation stage 12 and the liquid layer evaporation stage 13 to assist in observing the morphological changes and temperature distribution of the droplet evaporation process on the large droplet evaporation stage 12 and the liquid layer evaporation stage 13. The left background light source 61 and the right background light source 62 can be selected as KW-B2337-W and KW-B50100-W, respectively.

[0073] A left thermocouple (not shown in the figure) is provided on the side of the left plate 0032 near the receiving cavity 000. The left thermocouple is close to the left vent. A right thermocouple (not shown in the figure) is provided on the side of the right plate 0034 near the receiving cavity 000. The right thermocouple is close to the right vent. By setting the left and right thermocouples, the gas temperature of the inlet and outlet can be monitored, and the ambient temperature inside the combined liquid pool 1 can also be monitored.

[0074] The combined liquid pool 1 provided in this embodiment can be used for experiments including but not limited to: evaporation experiments of droplets, evaporation experiments of liquid layers, and evaporation experiments of droplets on different surfaces under microgravity conditions and various working conditions. At the same time, the combined liquid pool 1 provided in this embodiment can also be applied to the ground (which can be understood as the Earth environment). The difference between space and the ground is the difference in the gravitational field, which makes the morphology of droplets different during the experiment. Experiments conducted in space can obtain a more ideal physical model.

[0075] Example 2

[0076] Example 2 provides a liquid pool assembly, including a second experimental liquid pool 6, a third experimental liquid pool 7 and the above-mentioned combined liquid pool 1 installed in a space experiment chamber, and the liquid pool cavity of each liquid pool is sealed.

[0077] The second experimental liquid pool 6 includes a second evaporation stage fixedly installed inside the liquid pool cavity and a gas phase density observation component for observing the gas phase density during the droplet evaporation process.

[0078] The third experimental liquid pool 7 includes a third evaporation platform fixedly installed in the liquid pool cavity and a temperature measuring component for measuring the temperature of the gas-liquid interface during the evaporation process.

[0079] The second and third evaporation stages have the same structure as the large droplet evaporation stage 12.

[0080] Example 3

[0081] Example 3 provides a space evaporation phase change heat transfer scientific payload system

[0082] The space evaporation phase change heat transfer scientific payload system provided in this embodiment includes the liquid pool assembly, pressure regulation and gas circulation system 2, liquid injection and storage system 3, temperature control system 4, and pre-control system 5 as described in Embodiment 2. The liquid pool assembly is connected to the pressure regulation and gas circulation system 2, liquid injection and storage system 3, temperature control system 4, and pre-control system 5. The pre-control system 5 is also connected to the liquid pool assembly, pressure regulation and gas circulation system 2, liquid injection and storage system 3, and temperature control system 4. The pressure regulation and gas circulation system 2, liquid injection and storage system 3, and temperature control system 4 are independent of each other. Among them, the liquid pool assembly is the core area for space evaporation and heat transfer enhancement experimental research. The pre-control system 5 provides power supply, communication, and signal transmission services for the entire system. The pressure regulation and gas circulation system 2, liquid injection and storage system 3, and temperature control system 4 assist in the establishment of the liquid pool assembly. The experimental conditions include temperature, pressure, and ventilation. The space evaporation phase change heat transfer scientific payload system provided in this embodiment supports the research on the coupling effect of large-scale liquid droplet evaporation and phase change heat transfer under different working conditions, the coupling mechanism of space thin liquid layer evaporation and Marangoni effect (also known as the Marangoni effect, a physical phenomenon referring to the phenomenon of mass movement due to the tension gradient between two liquid interfaces with different surface tensions), the enhanced effect of convection and phase change heat transfer of small-scale liquid droplet evaporation under different evaporation substrate materials and different working conditions, the study of gas phase diffusion and density field distribution law in the phase change process of liquid droplets and liquid layers of different scales in space, and the study of non-equilibrium thermal effects of gas-liquid interface in the phase change process of liquid droplet evaporation of different scales in space.

[0083] The pressure regulation and gas circulation system 2 includes a gas management module 28, a first disconnector 261, a second disconnector 29, a combined liquid tank 1, a second experimental liquid tank 6, and a third experimental liquid tank 7. The gas management module 28 is used to supply working fluid to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7. The first disconnector 261 and the second disconnector 29 are used to quickly connect or disconnect the working fluid in the gas management module. The combined liquid tank 1 is used to study evaporation experiments of multiple droplets and / or liquid layers on different material substrates. The second experimental liquid tank 6 is used to study droplet / liquid layer vapor. Cloud phenomenon; the third experimental liquid pool 7 is used to study the non-equilibrium effect of the evaporating droplet / liquid layer phase change interface; the first disconnector 261 has a first quick-break male connector and a first quick-break female connector connected to the first quick-break male connector, the second disconnector 29 has a second quick-break female connector and a second quick-break male connector connected to the second quick-break female connector, the first quick-break male connector and the second quick-break male connector are respectively connected to the gas management module 28 through the air inlet 21 and the air outlet 24; the first air inlet pipe 2521 and the first air outlet pipe 2531 are respectively connected to the combined liquid pool 1, the second air inlet pipe 2522 and the second air outlet pipe 2532 is connected to the second experimental liquid tank 6, and the third inlet pipe 2523 and the third outlet pipe 2533 are connected to the third experimental liquid tank 7, respectively. The first quick-break female connector is connected to the main inlet pipe 251. The first inlet pipe 2521, the second inlet pipe 2522, and the third inlet pipe 2523 are connected to the main inlet pipe 251 through the first solenoid valve 22, thereby supplying the working fluid to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7. The second quick-break female connector is connected to the main outlet pipe 254. The first outlet pipe 2531, the second outlet pipe 2532, and the third outlet pipe 2533 are connected to the main outlet pipe 254, and the first outlet pipe 2532, the second outlet pipe 2532, and the third outlet pipe 2533 are connected to the third experimental liquid tank 7, respectively. 32 and the third vent pipe 2533 are respectively connected to the main vent pipe 254 through the second solenoid valve 23 to realize the cleaning of the combined liquid tank 1, the second experimental liquid tank 6 and the third experimental liquid tank 7; a first pressure sensor is installed on the combined liquid tank 1 to detect the gas pressure in the combined liquid tank 1; a second pressure sensor is installed on the second experimental liquid tank 6 to detect the gas pressure in the second experimental liquid tank 6; a third pressure sensor is installed on the third experimental liquid tank 7 to detect the gas pressure in the third experimental liquid tank 7.

[0084] The working medium supplied by the gas management module 28 can be nitrogen, which is an extremely inert gas with a preset purity of 99.999%. This means that the purity of the nitrogen supplied by the gas management module 28 to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7 must be no less than 99.999%, which is beneficial for cleaning the working medium or impurities (such as vapor after evaporation experiments) in the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7 later.

[0085] Both the first disconnector 261 and the second disconnector 29 are connection and separation mechanisms. Their main function is to quickly connect or disconnect the working gas medium on the space station in their respective pipelines according to work needs.

[0086] After the first quick-break male connector and the first quick-break female connector are engaged, the working fluid discharged from the gas management module 28 is in a flowing state, and the working fluid in the gas management module 28 flows smoothly at a specified rate and flow rate; when the first quick-break male connector and the first quick-break female connector are separated, the first disconnector 261 immediately closes. The second disconnector 29 operates on the same principle as the first disconnector 261.

[0087] It should be noted that the first and second quick-break male connectors can be directly installed on the gas management module 28. Subsequently, astronauts can plug the first quick-break female connector into the first quick-break male connector and the second quick-break female connector into the second quick-break male connector, so that a circuit is formed between the gas management module 28, the combined liquid pool 1, the second experimental liquid pool 6 and / or the third experimental liquid pool 7, which is beneficial for conducting evaporation experiments in the combined liquid pool 1, the second experimental liquid pool 6 and / or the third experimental liquid pool 7.

[0088] The first solenoid valve 22 is a "one-in, three-out" solenoid valve assembly. The model of this assembly can be W-SV-1-3W-ODF-4. The first solenoid valve 22 can control the simultaneous supply of working fluid to the first inlet pipe 2521, the second inlet pipe 2522, and the third inlet pipe 2523. Subsequently, the working fluid simultaneously enters the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7. Alternatively, the first solenoid valve 22 can also individually control the supply of working fluid to the first inlet pipe 2521, the second inlet pipe 2522, or the third inlet pipe 2523. The working fluid is supplied via pipeline 2523, and subsequently, the working fluid simultaneously enters the combined liquid tank 1, the second experimental liquid tank 6, or the third experimental liquid tank 7. The first solenoid valve 22 can also control the supply of a portion of the working fluid to the first intake pipeline 2521 and the second intake pipeline 2522, the first intake pipeline 2521 and the third intake pipeline 2523, or the second intake pipeline 2522 and the third intake pipeline 2523, so that the working fluid simultaneously enters the combined liquid tank 1 and the second experimental liquid tank 6, the combined liquid tank 1 and the third experimental liquid tank 7, or the second experimental liquid tank 6 and the third experimental liquid tank 7. The first solenoid valve 22 can also be any other valve assembly, as long as it can control the simultaneous or time-sharing supply of the working fluid to the first intake pipeline 2521, the second intake pipeline 2522, and the third intake pipeline 2523. This embodiment does not specifically limit this.

[0089] It should be noted that before supplying working fluid to combined liquid tank 1, second experimental liquid tank 6, and / or third experimental liquid tank 7, the astronauts connect the first quick-connect female connector to the first quick-connect male connector and the second quick-connect female connector to the second quick-connect male connector, thus forming a loop between the gas management module 28, the first disconnector 261, combined liquid tank 1, second experimental liquid tank 6, and / or third experimental liquid tank 7, the second disconnector 29, and all pipelines. When it is necessary to supply working fluid to combined liquid tank 1, second experimental liquid tank 6, and / or third experimental liquid tank 7, the astronauts will then be able to complete the process. When the working fluid is supplied to the third experimental liquid tank 7, the gas management module 28, the first disconnector 261, and the first solenoid valve 22 are activated, and the second solenoid valve 23 is closed. This allows the working fluid in the gas management module 28 to be supplied to the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7 simultaneously or sequentially through the first disconnector 261, the main air inlet pipe 251, and the first solenoid valve 22, so that the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7 can perform evaporation experiments. Specifically, the first solenoid valve 22 supplies the working fluid to the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7 simultaneously or sequentially through the first air inlet pipe 41, the second air inlet pipe 51, and the third air inlet pipe 61.

[0090] When the combined liquid tank 1, the second experimental liquid tank 6 and / or the third experimental liquid tank 7 have completed the evaporation experiment, the second solenoid valve 23 and the second disconnector 29 are opened, and the gas management module 28, the first disconnector 261 and the first solenoid valve 22 are closed, so that the working fluid and vapor in the combined liquid tank 1, the second experimental liquid tank 6 and / or the third experimental liquid tank 7 are discharged simultaneously or at different times through the second solenoid valve 23 and the second disconnector 29, so as to facilitate the simultaneous or at different times cleaning of the combined liquid tank 1, the second experimental liquid tank 6 and / or the third experimental liquid tank 7.

[0091] The working fluid is supplied to the combined liquid pool 1 via the first quick-break male connector and the first quick-break female connector, through the main air inlet pipe 251, the first solenoid valve 22, and the first air inlet pipe 2521 in sequence; or, the working fluid is supplied to the second experimental liquid pool 6 via the first quick-break male connector and the first quick-break female connector, through the main air inlet pipe 251, the first solenoid valve 22, and the second air inlet pipe 2522 in sequence; or, the working fluid is supplied to the third experimental liquid pool 7 via the first quick-break male connector and the first quick-break female connector, through the main air inlet pipe 251, the first solenoid valve 22, and the third air inlet pipe 2523 in sequence.

[0092] The working fluid is supplied to the combined liquid pool 1 via the first quick-break male connector and the first quick-break female connector, through the main air inlet pipe 251, the first solenoid valve 22, and the first air inlet pipe 2521 in sequence. The working fluid is also supplied to the second experimental liquid pool 6 via the first quick-break male connector and the first quick-break female connector, through the main air inlet pipe 251, the first solenoid valve 22, and the second air inlet pipe 2522 in sequence. Furthermore, the working fluid is supplied to the third experimental liquid pool 7 via the first quick-break male connector and the first quick-break female connector, through the main air inlet pipe 251, the first solenoid valve 22, and the third air inlet pipe 2523 in sequence.

[0093] The second quick-connect female connector is connected to the main vent pipe 254. The first vent pipe 2531, the second vent pipe 2532, and the third vent pipe 2533 are respectively connected to the main vent pipe 254 through the second solenoid valve 23, realizing the cleaning of the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7. The second solenoid valve 23 can be a "three-in-one-out" solenoid valve group, and the model of the "three-in-one-out" solenoid valve group can be W-SV-3-1W-ODF-4. After the evaporation experiment, the first solenoid valve 22 is closed, and the second solenoid valve 23 and the second disconnector 29 are opened. The second solenoid valve 23 can simultaneously control the working fluid in the first vent pipe 2531, the second vent pipe 2532, and the third vent pipe 2533 to be discharged through the main vent pipe 254, which is beneficial for cleaning the waste gas (including working fluid or impurities, including vapor after the evaporation experiment) in the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7. After the evaporation experiment, the second solenoid valve 23 can also independently control the working fluid in the first outlet pipe 2531, the second outlet pipe 2532, or the third outlet pipe 2533 to be discharged through the total outlet pipe 254, which is beneficial for cleaning the waste gas (including working fluid or impurities, including vapor after the evaporation experiment) in the combined liquid pool 1, the second experimental liquid pool 6, or the third experimental liquid pool 7. After the evaporation experiment, the second solenoid valve 23 can also control the working fluid in the first outlet pipe 2531 and the second outlet pipe 2532, the first outlet pipe 2531 and the third outlet pipe 2533, or the first outlet pipe 2531 and the third outlet pipe 2533 to be discharged through the total outlet pipe 254, which is beneficial for cleaning the waste gas (including working fluid or impurities, including vapor after the evaporation experiment) in the combined liquid pool 1 and the second experimental liquid pool 6, the combined liquid pool 1 and the third experimental liquid pool 7, or the second experimental liquid pool 6 and the third experimental liquid pool 7. The second solenoid valve 23 can also be other valve groups, as long as they can simultaneously or sequentially control the working fluid in the first outlet pipeline 2531, the second outlet pipeline 2532 and / or the third outlet pipeline 2533 to be discharged through the main outlet pipeline 254. This embodiment does not make specific limitations.

[0094] When the working fluid in the gas management module 28 enters the combined liquid tank 1 through the first disconnector 261, the first solenoid valve 22, and the first inlet pipe 2521, the waste gas in the combined liquid tank 1 after the evaporation experiment is discharged through the gas management module 28 via the first outlet pipe 2531, the second solenoid valve 23, and the second disconnector 29, thus realizing gas circulation in the combined liquid tank 1; when the working fluid in the gas management module 28 enters the second experimental liquid tank 6 through the first disconnector 261, the first solenoid valve 22, and the second inlet pipe 2522, the waste gas in the second experimental liquid tank 6 after the evaporation experiment... The exhaust gas is then discharged through the second outlet pipe 2532, the second solenoid valve 23, and the second disconnector 29 via the gas management module 28, realizing gas circulation within the second experimental liquid pool 6. When the working fluid in the gas management module 28 enters the third experimental liquid pool 7 through the first disconnector 261, the first solenoid valve 22, and the third inlet pipe 2523, the exhaust gas in the third experimental liquid pool 7 after the evaporation experiment is discharged through the third outlet pipe 2533, the second solenoid valve 23, and the second disconnector 29 via the gas management module 28, realizing gas circulation within the third experimental liquid pool 7.

[0095] It should be noted that, depending on the actual situation, the gas management module 28 mentioned above can be a gas pump. This gas pump has a gas-liquid separation function, which can quickly and effectively separate the moisture from the gas, ensuring the gas quality and normal operation of the equipment. There is no need to discharge the waste gas afterward. After the gas and liquid are separated by the gas pump, the gas can be reused. This gas can be nitrogen.

[0096] It should be noted that both the "one-in-three-out" solenoid valve group and the "three-in-one-out" solenoid valve group can be composed of multiple two-position two-way energized valves from the 621300 series. Each single valve in the "one-in-three-out" solenoid valve group and the "three-in-one-out" solenoid valve group flows in one direction and works independently. Its parameters are as follows: (1) Working medium: test working medium; (2) Maximum working pressure: 5 bar; (3) Power supply: 24Vdc; (4) Power consumption: 5-6W; (5) Sealing material: EPDM (ethylene propylene diene monomer rubber).

[0097] It should be noted that: the gas management module 28 provides the working fluid. When it is necessary to supply the working fluid to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7, the first disconnector 261 and the first solenoid valve 22 are opened, and the second solenoid valve 23 is closed. The gas management module 28 supplies the working fluid to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7 sequentially through the first disconnector 261, the first solenoid valve 22, the first air inlet pipe 2521, the second air inlet pipe 2522, and the third air inlet pipe 2523, creating a shear flow during the evaporation experiment. After the evaporation experiment of the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7 is completed, the second solenoid valve 23 and the second disconnector 29 are opened, and the first disconnector 261 and the first solenoid valve 22 are closed, combining... The waste gas in liquid pool 1, the second experimental liquid pool 6, and the third experimental liquid pool 7 is discharged through the first outlet pipe 2531, the second outlet pipe 2532, and the third outlet pipe 2533, respectively, and then through the second solenoid valve 23 and the gas management module 28. When it is not necessary to supply medium to the combined liquid pool 1, the second experimental liquid pool 6, and the third experimental liquid pool 7, the supply of medium to the combined liquid pool 1, the second experimental liquid pool 6, and the third experimental liquid pool 7 can be stopped by separating the first quick-break male head and the first quick-break female head in the first disconnector 261. When it is not necessary to clean the combined liquid pool 1, the second experimental liquid pool 6, and the third experimental liquid pool 7, the cleaning of the waste gas in the combined liquid pool 1, the second experimental liquid pool 6, and the third experimental liquid pool 7 can be stopped by separating the second quick-break female head and the second quick-break male head in the second disconnector 29.

[0098] A first pressure sensor is installed on the combined liquid tank 1. This first pressure sensor detects the gas pressure inside the combined liquid tank 1. Specifically, it detects the ambient pressure inside the combined liquid tank 1 and the ambient pressure during the evaporation experiment. The data from the first pressure sensor can also be fed back to the gas management module 28, which adjusts relevant parameters of the working fluid in the combined liquid tank 1, such as the working fluid flow rate and volume, based on the data from the first pressure sensor. A second pressure sensor is installed on the second experimental liquid tank 6. This second pressure sensor detects the gas pressure inside the second experimental liquid tank 6. Specifically, it detects the ambient pressure inside the second experimental liquid tank 6 and the ambient pressure during the evaporation experiment. The first pressure sensor can also feed back data to the gas management module 28, which adjusts relevant parameters of the working fluid in the second experimental liquid tank 6, such as the working fluid flow rate and volume, based on the data from the first pressure sensor. A third pressure sensor is installed on the third experimental liquid tank 7 to detect the gas pressure inside the third experimental liquid tank 7, as well as the ambient pressure during the evaporation experiment. The data from the first pressure sensor can also be fed back to the gas management module 28, which adjusts relevant parameters of the working fluid in the third experimental liquid tank 7, such as the working fluid flow rate and volume, based on the data from the first pressure sensor.

[0099] The first pressure sensor, the second pressure sensor, and / or the third pressure sensor can all be PAA-33X, which can accurately measure the pressure in the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7 and feed the data back to the gas pipeline module 1. Subsequently, the gas pipeline module 1 adjusts the gas supply in the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7 according to the pressure values ​​fed back by the first pressure sensor, the second pressure sensor, and / or the third pressure sensor.

[0100] Compared with the prior art, the pressure regulation and gas circulation system for multiple evaporator pools provided in this embodiment achieves at least the following beneficial effects:

[0101] This embodiment provides a pressure control and gas circulation system for multiple evaporation tanks, including a gas management module 28, a first disconnector 261, a second disconnector 29, a combined liquid tank 1, a second experimental liquid tank 6, and a third experimental liquid tank 7. The gas management module 28 supplies working fluid to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7; the first disconnector 261 and the second disconnector 29 enable rapid connection or disconnection of the working fluid in the gas pipeline; the combined liquid tank 1 is used to study evaporation experiments of multiple droplets and / or liquid layers on different material substrates; the second experimental liquid tank 6 is used to study droplet / liquid layer vapor cloud phenomena; and the third experimental liquid tank 7 is used to study evaporation droplets. / Non-equilibrium effect at the liquid phase change interface; the first disconnector 261 has a first quick-break male connector and a first quick-break female connector connected to the first quick-break male connector, the second disconnector 29 has a second quick-break female connector and a second quick-break male connector connected to the second quick-break female connector, the first quick-break male connector and the second quick-break male connector are respectively connected to the gas management module 28; the first inlet pipe 2521 and the first outlet pipe 2531 are respectively connected to the combined liquid pool 1, the second inlet pipe 2522 and the second outlet pipe 2532 are respectively connected to the second experimental liquid pool 6, the third inlet pipe 2523 and the third outlet pipe 2533 are respectively connected to the third experimental liquid pool 7; the first quick-break female connector is connected to the main inlet pipe 25 1. The first air inlet pipe 2521, the second air inlet pipe 2522, and the third air inlet pipe 2523 are respectively connected to the main air inlet pipe 251 through the first solenoid valve 22 to supply the working fluid to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7; the second quick-cut female connector is connected to the main air outlet pipe 254, and the first air outlet pipe 2531, the second air outlet pipe 2532, and the third air outlet pipe 2533 are respectively connected to the main air outlet pipe 254 through the second solenoid valve 23 to clean the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7; a first pressure sensor is installed on the combined liquid tank 1, and the first pressure sensor is used to detect the pressure in the combined liquid tank 1. The internal gas pressure; a second pressure sensor is installed on the second experimental liquid tank 6, and a first pressure sensor is used to detect the gas pressure inside the second experimental liquid tank 6; a third pressure sensor is installed on the third experimental liquid tank 7, and the third pressure sensor is used to detect the gas pressure inside the third experimental liquid tank 7. By adopting the above scheme, through the mutual coordination between the gas management module 28, the first disconnector 261, the combined liquid tank 1, the second experimental liquid tank 6, the third experimental liquid tank 7 and the second disconnector 29, it is beneficial to realize the gas circulation, gas supply and cleaning of the combined liquid tank 1, the second experimental liquid tank 6 and / or the third experimental liquid tank 7.The first, second, and third pressure sensors can detect the internal environmental pressure of the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7, as well as the environmental pressure during the evaporation experiment. The data from the first pressure sensor can then be fed back to the gas management module 28, which adjusts the relevant parameters of the working fluids in the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7 based on the data from the first pressure sensor.

[0102] In some optional embodiments, the main air intake pipe 251 includes a first branch pipe and a second branch pipe connected to the first branch pipe. A bypass pipe 255 connects the first and second branch pipes. A third solenoid valve 263 is installed at the end of the bypass pipe 255. The third solenoid valve is connected to the gas management module 28 through the suction port 27. The third solenoid valve 263 is used to provide a negative pressure environment to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7. That is, when there is overcharge of the working fluid in the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7, the third solenoid valve 263 can be turned on to create a negative pressure environment in the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7, thereby sucking out the medium in the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7 and avoiding overcharge.

[0103] It should be noted that when there is no overcharge of working fluid in the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7, the third solenoid valve 263 can be disconnected.

[0104] Positive pressure refers to a state where the pressure inside a system is higher than the external pressure. In practical applications, positive pressure is usually achieved by injecting gas into the system. Negative pressure refers to a state where the pressure inside a system is lower than the external pressure. Negative pressure is achieved by allowing gas to flow out of the system.

[0105] The first air intake pipe 2521, the second air intake pipe 2522, the third air intake pipe 2523, the first air outlet pipe 2531, the second air outlet pipe 2532, the third air outlet pipe 2533, the main air intake pipe 251, the main air outlet pipe 254, and the bypass pipe 255 can all be made of flexible hoses. Flexible hoses are highly flexible, reduce installation and maintenance costs, and reduce internal resistance.

[0106] The first air intake pipe 2521, the second air intake pipe 2522, the third air intake pipe 2523, the first air outlet pipe 2531, the second air outlet pipe 2532, the third air outlet pipe 2533, the main air intake pipe 251, the main air outlet pipe 254, and the bypass pipe 255 can all be made of acrylic material. Acrylic has a light transmittance of over 92%, clear vision, good weather resistance, stability, and flame retardancy.

[0107] The first air inlet pipe 2521, the second air inlet pipe 2522, the third air inlet pipe 2523, the first air outlet pipe 2531, the second air outlet pipe 2532, the third air outlet pipe 2533, the main air inlet pipe 251, the main air outlet pipe 254, and the bypass pipe 255 can all adopt a closed structure to ensure the safety and reliability of the pressure regulation and gas circulation system used for multiple sets of evaporator pools, which meets the safety requirements of aerospace payload structures.

[0108] In some alternative embodiments, combined with Figure 1 As shown, a vent connector 262 connects the first branch gas line, the second branch gas line, and the bypass gas line 255. The vent connector 262 is used to divert the working fluid in the main intake gas line 251 into multiple flow directions. The vent connector 262 can be a T-junction. The vent connector 262 facilitates the diversion of the working fluid in the main intake gas line 251 into two flow directions. When the third solenoid valve 263 is open, it facilitates the supply of the working fluid to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7 through the first branch gas line, the second branch gas line, the first solenoid valve 22, and the first intake gas line 2521. When the third solenoid valve 263 is open, it facilitates the provision of a negative pressure environment to the combined liquid tank 1, the second experimental liquid tank 6, and the third experimental liquid tank 7.

[0109] In some optional embodiments, when the gas management module 28 provides an excessively low gas working fluid circulation flow rate, the working fluid cannot enter the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7; when the gas management module 28 provides an excessively high gas working fluid circulation flow rate, the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7 will be overcharged. In this embodiment, the gas management module 28 provides a gas working fluid circulation flow rate of 0.5 L / min to 9 L / min, which not only ensures that the working fluid effectively enters the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7, but also avoids the overcharge of gas in the combined liquid tank 1, the second experimental liquid tank 6, and / or the third experimental liquid tank 7.

[0110] The liquid injection and storage system 3 includes a liquid accumulator 31, a front liquid distribution valve 32, a liquid injection mechanism 33, and a rear liquid distribution valve 34. Along the direction of liquid flow, the liquid accumulator 31 and the front liquid distribution valve 32 are connected by a liquid supply pipe 351, the front liquid distribution valve 32 and the liquid injection mechanism 33 are connected by a front liquid injection pipe 352, the liquid injection mechanism 33 and the rear liquid distribution valve 34 are connected by a middle liquid injection pipe 353, and the rear liquid distribution valve 34 and the liquid pool assembly are connected by a rear liquid injection pipe 354.

[0111] Reference Figure 1As shown, a supply pipe valve 361 and a supply pipe pressure sensor 362 are installed on the supply pipe 351. The supply pipe valve 361 is used to control the connection and disconnection between the accumulator 31 and the front dispensing valve 32. The supply pipe pressure sensor 362 is used to monitor the water pressure on the supply pipe 351. There can be two injection mechanisms 33, which include a combined injection mechanism 331 and an experimental injection mechanism 332. The combined injection mechanism 331 is used to supply liquid to the combined liquid tank 1, and the experimental injection mechanism 332 is used to supply liquid to the second experimental liquid tank 6 and the third experimental liquid tank 7. The front dispensing valve 32 can be a one-inlet, two-outlet valve, through which the liquid in the accumulator 31 can be distributed. The liquid is delivered to different injection mechanisms 33. A front dispensing valve 32 is provided to enable simultaneous liquid supply to the combined injection mechanism 331 and the experimental injection mechanism 332 at the same time, or sequential liquid supply to the combined injection mechanism 331 and the experimental injection mechanism 332 at different times. This ensures that the combined injection mechanism 331 and the experimental injection mechanism 332 are independent of each other and do not interfere with each other during the liquid supply process. The front injection pipe 352 includes a combined front injection pipe 3521 and an experimental front injection pipe 3522. The combined front injection pipe 3521 is connected to the front dispensing valve 32 and the combined injection mechanism 331, and the experimental front injection pipe 352 is connected to the front dispensing valve 32 and the experimental injection mechanism 332.

[0112] Reference Figure 1 As shown, the injection mechanism 33 is connected to the rear dispensing valve 34 via a central injection pipe 353, and the rear dispensing valve 34 is connected to the liquid pool assembly via a rear injection pipe 354. The rear dispensing valve 34 includes a combined rear dispensing valve 341 and an experimental rear dispensing valve 342. The central injection pipe 353 includes a combined central injection pipe 3531 and an experimental central injection pipe 3532. The rear injection pipe 354 includes a combined rear injection pipe 3541, a second liquid pool rear injection pipe 3542, and a third liquid pool rear injection pipe 3543. The combined injection mechanism 331 supplies liquid to the combined liquid pool 1 sequentially through the combined central injection pipe 3531, the combined rear dispensing valve 341, and the combined rear injection pipe 3541, continuing the combination... Figure 3 As shown, the number of combined injection pipes 3541 can be matched with the number of combined injection ports. The combined injection pipes 3541 can be connected to the combined injection ports. The combined dispensing valve 341 can control whether each combined injection pipe 3541 is in the liquid supply state. This configuration ensures that the operation of a combined evaporation platform 111 can be controlled independently in the combined liquid tank 1. The experimental injection mechanism 332 sequentially supplies liquid to the second experimental liquid tank 6 through the experimental injection pipe 3532, the experimental dispensing valve 342, and the second liquid tank injection pipe 3542, continuing the combination... Figure 4 As shown, the second liquid tank's downstream injection pipe 3542 can be connected to the second liquid tank's injection port; the experimental injection mechanism 332 sequentially supplies liquid to the third experimental liquid tank 7 through the experimental injection pipe 3532, the post-experimental liquid distribution valve 342, and the third liquid tank's downstream injection pipe 3543, continuing to combineFigure 5 As shown, the injection pipe 3543 after the third liquid tank can be connected to the injection port of the third liquid tank.

[0113] By setting up a liquid injection and storage system 3, the liquid injection and storage system 3 can inject a certain volume of liquid into different evaporation platforms in different experimental liquid pools before the experiment to form initial droplets / liquid layers. These liquids can be used in the evaporation experiment and are finally discharged in the form of waste gas through the gas circulation system 2.

[0114] The temperature control system 4 includes temperature control units for each evaporation stage, such as the small stage heating device 114 and the temperature control device 128. The temperature control units can be heating elements or semiconductor coolers (TECs). By setting up the temperature control system 4, the auxiliary liquid pool assembly establishes the temperature experimental conditions.

[0115] The pre-control system 5 is electrically connected to the liquid pool assembly, gas circulation system 2, liquid injection and storage system 3, and temperature control system 4 respectively. The pre-control system 5 includes functions such as power supply and distribution, communication management, message processing, instruction processing, data management, and time code management. It can collect analog and signal quantities in the experimental area and provide power and communication with the experimental main control unit and the basic cabinet controller.

[0116] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A space evaporation phase change heat transfer scientific payload system, characterized in that, It includes a pressure regulation and gas circulation system (2), a liquid injection and storage system (3), and a liquid pool assembly. The pressure regulation and gas circulation system (2) is used to supply gaseous working fluid to each liquid pool in the experiment, remove working fluid and impurities after the evaporation experiment, and regulate the gas pressure in the experimental liquid pool. The liquid injection and storage system (3) is used to inject liquid into multiple liquid pools in the liquid pool assembly to form droplets or liquid layers. The pressure regulation and gas circulation system (2) includes a gas management module (28), a first disconnector (261), a first solenoid valve (22), a liquid pool assembly, a second solenoid valve (23), and a second disconnector (29) that are connected in sequence to form a closed loop. The first solenoid valve (22) is a one-in-multiple-out solenoid valve, and is connected to the three liquid pools in the liquid pool assembly through a main air inlet pipe (251) and three branch air inlet pipes respectively. The second solenoid valve (23) is a multi-in-one-out solenoid valve, and is connected to the three liquid pools in the liquid pool assembly through a main air outlet pipe (254) and three branch air outlet pipes respectively. The gas management module (28) is used to input the working gas required for the evaporation experiment into the three liquid pools, and to remove the working gas and impurities generated in the experiment after the evaporation experiment. The first solenoid valve (22) can control the three branch inlet pipes to open simultaneously or individually, so as to supply gaseous working fluid to the three experimental liquid pools simultaneously or at different times. The second solenoid valve (23) can control the three outlet pipes to open simultaneously or individually, so as to discharge impurities and working fluid in the three experimental liquid pools simultaneously or at different times.

2. The space evaporation phase change heat transfer scientific payload system according to claim 1, characterized in that, The liquid pool assembly includes a second experimental liquid pool (6), a third experimental liquid pool (7), and a combined liquid pool (1) installed in the space experimental chamber, and the liquid pool cavity of each liquid pool is sealed. The second experimental liquid pool (6) includes a second evaporation stage fixedly installed in the liquid pool cavity and a gas phase density observation component for observing the gas phase density during the droplet evaporation process; The third experimental liquid pool (7) includes a third evaporation platform fixedly installed in the liquid pool cavity and a temperature measuring component for measuring the temperature of the gas-liquid interface during the evaporation process. The combined liquid pool (1) is sealed in the liquid pool cavity. The combined liquid pool (1) includes multiple small droplet evaporation platforms (11), large droplet evaporation platforms (12) and liquid layer evaporation platforms (13) that are fixedly installed at the bottom of the liquid pool cavity and arranged sequentially along the length of the liquid pool for evaporation experiments. The combined liquid pool (1) has an evaporation observation component installed in its liquid pool cavity for observing the evaporation process; The evaporation platforms (11) of the multiple small droplets are made of different materials and are used to conduct evaporation experiments of small droplets on different platforms; The second and third evaporation stages have the same structure as the large droplet evaporation stage (12).

3. The space evaporation phase change heat transfer scientific payload system according to claim 2, characterized in that, The main intake pipe (251) includes two sections of pipe. The end of the bypass pipe (255) is connected to the two sections of pipe via a three-way connector (262). The other end of the bypass pipe (255) is connected to the third solenoid valve (263). The third solenoid valve (263) is connected to the gas management module (28). Pressure sensors for detecting the pressure inside the liquid pool cavity are installed in the combined liquid pool (1), the second experimental liquid pool (6), and the third experimental liquid pool (7).

4. The space evaporation phase change heat transfer scientific payload system according to claim 2, characterized in that, The liquid injection and storage system (3) includes a liquid accumulator (31) and a front dispensing valve (32). The liquid accumulator (31) and the front dispensing valve (32) are connected by a liquid supply pipe (351). A liquid supply pipe valve (361) and a liquid supply pipe pressure sensor (362) are installed on the liquid supply pipe (351). The front dispensing valve (32) is connected to a combined liquid injection mechanism (331) and an experimental liquid injection mechanism (332) through a combined front liquid injection pipe (3521) and an experimental front liquid injection pipe (3522), respectively. The combined liquid injection mechanism... The structure (331) is connected to the combined liquid dispensing valve (341) via the combined liquid injection pipe (3531). The combined liquid dispensing valve (341) is connected to each evaporation platform in the combined liquid pool (1) via multiple combined liquid injection pipes (3541). The experimental liquid injection mechanism (332) is connected to the experimental liquid dispensing valve (342) via the experimental liquid injection pipe (3532). The experimental liquid dispensing valve (342) is connected to the evaporation platform in the second experimental liquid pool (6) and the third experimental liquid pool (7) via two experimental liquid injection pipes respectively.

5. A space evaporation phase change heat transfer scientific payload system according to claim 4, characterized in that, The gas phase density observation assembly includes an infrared observer installed on the top of the liquid pool cavity and a density optical measuring instrument installed on the side. The temperature measuring component includes a high-definition CCD and a thermocouple array installed inside the liquid pool cavity.

6. The space evaporation phase change heat transfer scientific payload system according to claim 5, characterized in that, The evaporation observation assembly includes an infrared observer and a laser interferometer mounted on the top of the liquid pool cavity, and a high-definition CCD mounted on the side of the liquid pool cavity.

7. A space evaporation phase change heat transfer scientific payload system according to claim 6, characterized in that, Multiple small droplet evaporation stages (11) are mounted on a small stage base (110). Each small droplet evaporation stage (11) includes a small stage heating device (114), a small stage base (113), a small stage heat flow sensor (112), and a small stage evaporation substrate (111) arranged sequentially in a direction away from the small stage base (110). The small platform heat flow sensor (112), the small platform evaporation substrate (111), and the small platform base (113) are all provided with concentric droplet holes at their upper ends. The small platform base (113) is also provided with a small platform base connection hole (1133) that communicates with the droplet holes thereon. The small platform base connection hole (1133) is connected to the liquid injection mechanism through the small platform connector (115) to form droplets on the small platform evaporation substrate (111). The small platform base (113) is also provided with a small platform base test hole (1132), and a small platform temperature sensor is provided in the small platform base test hole (1132) to measure the surface temperature of the vapor generated during the droplet evaporation process, thereby reflecting the influence of evaporation effect and thermocapillary convection on the internal heat transfer characteristics of the droplet; the small platform heat flow sensor (112) is used to accurately measure the change of heat flow at the bottom of the droplet to reflect the influence of evaporation effect and thermocapillary convection on the internal heat transfer characteristics of the droplet; the small platform heating device (114) is used to provide heat to the evaporation platform to ensure that the droplet in evaporation is at a fixed temperature or within a predetermined temperature change range; The small platform base (113) is also fixedly installed with a small platform support (1101) for carrying the small platform heat flow sensor (112).

8. A space evaporation phase change heat transfer scientific payload system according to claim 7, characterized in that, The small platform base (113) and the small platform heat flow sensor (112) are covered with a small platform heat insulation layer (116), which is used to isolate the temperature of the small platform base (113) to avoid interfering with the evaporation of droplets; The small platform insulation layer (116) has a notch in the middle for placing the small platform evaporation base (111), and the upper surface of the small platform insulation layer (116) is flush with the upper surface of the small platform evaporation base (111).

9. A space evaporation phase change heat transfer scientific payload system according to claim 5, characterized in that, The large droplet evaporation stage (12) is mounted on a large stage base (124). The large droplet evaporation stage (12) includes a large stage base (123), a large stage internal sensor (125), and a large stage evaporation substrate (121) arranged sequentially in a direction away from the large stage base (124). The upper end of the large platform base (123), the sensor (125) inside the large platform, and the evaporation base (121) of the large platform are all provided with concentric droplet holes. The large platform base (123) is also provided with a large platform base connection hole that communicates with the droplet holes on it. The large platform base connection hole is connected to the liquid injection mechanism through the large platform connector (126) to form droplets on the evaporation base (121) of the large platform. The diameter of the droplet hole on the large platform evaporation substrate (121) is larger than the diameter of the droplet hole on the small platform evaporation substrate (111), and the upper surface of the large platform evaporation substrate (121) is provided with an annular droplet groove (1212) concentric with the droplet hole to limit the size and position of the droplet. The large platform base (123) and the large platform internal sensor (125) are covered with a large platform heat insulation layer (122). The large platform heat insulation layer (122) is used to isolate the temperature of the large platform base (123) to avoid interfering with the evaporation of droplets. The large platform insulation layer (122) has a notch in the middle for placing the large platform evaporation base (121), and the upper surface of the large platform insulation layer (122) is flush with the upper surface of the large platform evaporation base (121). The platform base (124) is also equipped with a platform support (127), the upper surface of which abuts against the lower surface of the sensor (125) inside the platform.

10. A space evaporation phase change heat transfer scientific payload system according to claim 9, characterized in that, A temperature control device (128) is provided on the side of the large platform base (124) away from the large platform base (123). The temperature control device (128) is used to make the large droplet evaporation platform (12) reach a predetermined temperature or a predetermined heating / cooling rate during the droplet evaporation process.

11. A space evaporation phase change heat transfer scientific payload system according to claim 10, characterized in that, The large platform insulation layer (122) is also provided with a large platform test upper hole (1222) and a large platform test lower hole (1200) that are transversely penetrating the large platform insulation layer (122). Both the large platform test upper hole (1222) and the large platform test lower hole (1200) are provided with large platform external sensors. The large platform external sensors are used to measure the steam temperature, the cooling or heating temperature of the temperature control device (128), and the steam heat flow.

12. A space evaporation phase change heat transfer scientific payload system according to claim 5, characterized in that, The liquid layer evaporation stage (13) is mounted on the liquid layer stage base (134). The liquid layer evaporation stage (13) includes a liquid layer stage base (133), a liquid layer stage sensor (135), and a liquid layer stage evaporation substrate (131) arranged sequentially in a direction away from the liquid layer stage base (134). The upper end of the liquid stage base (133), the sensor (135) inside the liquid stage, and the liquid stage evaporation substrate (131) are all provided with concentric droplet holes. The liquid stage base (133) is also provided with a liquid stage base connection hole that communicates with the droplet holes thereon. The liquid stage base connection hole is connected to the liquid injection mechanism through the liquid stage connector (136) to form droplets on the liquid stage evaporation substrate (131). The upper surface of the liquid layer evaporation substrate (131) is provided with an annular droplet ring concentric with the droplet orifice to prevent the liquid layer from flowing out.

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