Small space phase change heat transfer experimental device

Abstract

The invention discloses a small space phase change heat transfer experimental device. The experimental device comprises an experimental liquid pool assembly, a liquid injection assembly and an experimental data acquisition assembly which are arranged in a support frame, the supporting frame forms a multi-layer structure in the vertical direction, a plurality of experimental liquid pools of the experimental liquid pool assembly are horizontally arranged in the supporting frame from top to bottom, the experimental liquid pools on every two adjacent horizontal planes are not overlapped on the projection plane, and a space is reserved between the lowest experimental liquid pool and the bottom of the supporting frame; the liquid injection assembly is used for injecting the experimental working medium in the liquid storage device into the evaporation table, and part of structural parts of the liquid injection assembly are arranged in the bottom space of the supporting frame; observation windows are arranged above and on the side of the experiment liquid pool, and optical observation equipment arranged outside the supporting frame obtains image data in the experiment liquid pool through the observation windows. The structural layout design of the multi-layer space experimental device is compact in structure, high in strength, high in load structural mass ratio, modularized in partition, beneficial to debugging and low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of space experimental devices, and in particular to a small-scale space phase change heat transfer experimental device. Background Art

[0002] With the development of my country's aerospace technology, a large number of space science payload development tasks have followed. The biggest difference between space science experiments and ground science experiments is that the two are in different environments. Under microgravity conditions, the buoyancy convection, gravity sedimentation, liquid pressure gradient and other phenomena in the fluid caused by the original ground gravity effect basically disappear, and some secondary effects masked by the ground gravity effect become prominent. The fluid morphology and physical and chemical processes undergo significant changes, which will affect the flow and heat transfer mechanisms, related material processing and preparation processes. At the same time, since some basic physics experimental conditions 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 is a ubiquitous phenomenon in nature, and its phase change heat transfer (heat transfer during liquid boiling and steam condensation) process is also a classic problem that has been studied in physics for a long time. This cyclic process is greatly affected by the natural (buoyancy) convection caused by gravity at all times. On Earth, such evaporation and convection affect human production and life. For example, thermal equipment such as air conditioners and heat pipes are heat exchangers designed using the principle of phase change heat transfer. The microgravity environment in spacecraft (such as manned space stations and satellites) has no natural convection, which will greatly affect the evaporation phase change process. 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 use the space microgravity environment to carry out space evaporation phase change heat transfer scientific experiments. Through this experiment, the special phenomenon of space phase change heat transfer can be studied, its special laws can be understood, and then new methods and technologies can be mastered to overcome the adverse effects of space phase change heat transfer, so as to develop thermal equipment that can be well applied to the space environment.

[0004] Moreover, space experiments require more and more complexity, engineering and standardization, with less and less margin for power consumption, mechanics, etc., and shorter and shorter development cycles. Under the mission requirements of high safety, high reliability and rapid iteration, modular design is needed. Each module is physically and functionally independent, and standard mechanical, electrical, thermal and data interfaces are used to connect the modules to realize the overall function of the experimental device.

[0005] Therefore, under current technical conditions, how to maximize the volume ratio of the entire experimental payload device within the space of the standard experimental cabinet in the space station cabin to improve the utilization efficiency of the entire space experimental cabinet is the focus of the experimental device layout design. Summary of the Invention

[0006] The purpose of the present invention is to provide a small-scale spatial phase change heat transfer experimental device, which improves the volume ratio of the overall equipment through a multi-layer layout design to solve the technical problems existing in the prior art.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] A small-scale spatial phase change heat transfer experimental device comprises an experimental liquid pool assembly and a liquid injection assembly built into a support frame; the experimental liquid pool assembly comprises a plurality of experimental liquid pools, each of which has at least one evaporation table; the plurality of experimental liquid pools are horizontally arranged from top to bottom inside the support frame, and at least one experimental liquid pool is arranged on each horizontal plane; the experimental liquid pools on two adjacent horizontal planes do not overlap each other on a projection plane, and a space is reserved between the experimental liquid pool located at the bottom and the bottom of the support frame; observation windows are provided above and on the sides of the experimental liquid pools, and the support frame is unobstructed in the horizontal or vertical direction corresponding to the observation windows, so that an optical observation device arranged outside the support frame can obtain image data of changes in droplets or liquid layers on the evaporation table through the observation windows; the liquid injection assembly comprises at least one liquid reservoir and at least one set of liquid injection pumps, the liquid injection pumps being used to inject the experimental working fluid in the liquid reservoir into the evaporation table, the liquid injection pumps being connected to the plurality of evaporation tables via at least one set of one-inlet and multiple-outlet solenoid valves; the liquid reservoir and part of the liquid injection assembly are arranged in the bottom space of the support frame.

[0009] Furthermore, the experimental liquid pool located on the same horizontal plane and the one-inlet-multiple-outlet solenoid valve corresponding to the experimental liquid pool located on the same horizontal plane are all arranged on the same mounting plate, and the mounting plate is detachably connected to the support frame.

[0010] Furthermore, each of the experimental liquid pools provided on the mounting plate is provided with a corresponding set of injection pumps, and the injection pumps are provided on the corresponding mounting plate or in the bottom space of the support frame.

[0011] Furthermore, the plurality of experimental liquid pools are distributed on the two support plates, and the observation windows located above the experimental liquid pools on the two support plates in the vertical direction are not blocked.

[0012] Furthermore, a sealing joint is provided on the side wall of the experimental liquid pool, and the sealing joint is used to connect the power supply line, data transmission line and control line in the experimental liquid pool with the external module.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The small-scale spatial phase change heat transfer experimental device provided by the present invention adopts a multi-layer layout design, occupies a small space, has a high volume ratio, and has a reasonable layout design. It is a small-scale spatial phase change heat transfer experimental device that can be applied to standard experimental cabinets in space station cabins. It is a multi-layer space experimental device structural design that realizes a compact structure with high strength, high load-to-structure mass ratio, modular partitioning, easy debugging, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0016] Figure 1 This is a schematic diagram of the structure of a small-scale spatial phase change heat transfer experimental device;

[0017] Figure 2 This is a structural schematic diagram of a specific embodiment of a small-scale spatial phase change heat transfer experimental device;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure of the upper layer inside the support frame shown;

[0019] Figure 4 for Figure 2 A schematic diagram of the structure of the middle and lower layers inside the support frame is shown;

[0020] Figure 5 for Figure 2 Schematic diagram of the structure of the support frame shown.

[0021] The numbers in the figure represent the following:

[0022] 1-support frame, 2-experimental liquid pool, 21-independent experimental liquid pool, 22-combined experimental liquid pool, 3-liquid reservoir, 4-liquid injection pump, 5-sealing joint, 6-observation window, 7-mounting plate, 71-first mounting plate, 72-second mounting plate.

[0023] 11 - first support member, 12 - second support member, 13 - third support member, 14 - fourth support member, 15 - first support rod, 16 - second support rod, 17 - connecting rod, 18 - bottom plate. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The spatial phase change heat transfer experimental device provided by the present invention mainly provides a carrier for spatial evaporation heat transfer experiments, but is not limited to spatial evaporation heat transfer experiments and can also be used for spatial condensation heat transfer experiments.

[0026] The space evaporation or condensation phase change heat transfer scientific experiment takes droplets or liquid layers as the research objects. In a microgravity environment, a variety of experimental instruments are used to observe the evaporation or condensation process of droplets or liquid layers on the evaporation table, and various heat exchange experimental data and images are obtained, in order to obtain new cognition and new results in theoretical research on the basic laws of heat and mass transfer at the gas-liquid interface and the stability of the evaporation interface, and provide a basis for the development of space phase change heat transfer equipment.

[0027] like Figure 1 As shown, the present invention provides a specific embodiment of a small-scale spatial phase change heat transfer experimental device, including an experimental liquid pool component and a liquid injection component built into a support frame 1.

[0028] In this embodiment, the support frame 1 is mainly used to install and fix the experimental liquid pool component and the liquid injection component, wherein the support frame 1 can be replaced by any structure with an accommodating space.

[0029] Furthermore, the support frame 1 is a frame structure, which can reduce the weight of the entire experimental device and facilitate the installation of the experimental liquid pool component, the liquid injection component and the experimental data acquisition component.

[0030] In this embodiment, the experimental liquid pool assembly includes multiple experimental liquid pools 2, each experimental liquid pool 2 has at least one evaporation table; in principle, the evaporation table in each experimental liquid pool 2 corresponds to one experiment. When an experiment requires multiple evaporation tables, multiple evaporation tables can be set in one experimental liquid pool 2 to form a combined experimental liquid pool.

[0031] In order to improve the volumetric ratio of the entire experimental device, in this embodiment, multiple experimental liquid pools 2 are horizontally arranged from top to bottom inside the support frame 1 to form a multi-layer structure; and the experimental liquid pools 2 on two adjacent horizontal planes do not overlap with each other on the projection surface, and space is reserved between the lowest experimental liquid pool 2 and the bottom of the support frame 1.

[0032] At least one experimental liquid pool 2 is set on each horizontal plane. Preferably, the experimental liquid pools 2 required for space experiments are combined according to the specifications of the individual experimental liquid pools 2 and the actual size of the support frame 1 to integrate more experimental liquid pools 2 in a single horizontal plane.

[0033] In this embodiment, observation windows 6 are provided above and on the sides of the experimental liquid pool 2, and there is no obstruction on the support frame 1 in the horizontal or vertical direction corresponding to the observation windows 6, so that the optical observation equipment arranged outside the support frame 1 can obtain image data of the changes in the droplets or liquid layer on the evaporation table through the observation windows 6.

[0034] In this embodiment, the injection assembly includes at least one liquid reservoir 3 and at least one group of injection pumps 4. The injection pump 4 is used to inject the experimental working fluid in the liquid reservoir 3 into the evaporation table. The injection pump 4 is connected to multiple evaporation tables through at least one group of one-inlet and multiple-outlet solenoid valves. Since the liquid storage chamber and the injection pump 4 occupy a large space, in order to improve the overall volume ratio of the experimental device, a minimum number of infusion pumps and injection pumps 4 are used to achieve simultaneous or time-sharing injection into multiple evaporation tables.

[0035] Among them, since the space reserved at the bottom of the support frame 1 is the largest, the liquid reservoir 3 and the injection pump 4 are preferably arranged in the bottom space of the support frame 1.

[0036] Furthermore, from the perspective of modular design, the experimental liquid pools 2 on the same horizontal plane are arranged on the same mounting plate 7, and the mounting plate 7 is detachably connected to the support frame 1; when the internal space of the experimental device permits, the one-inlet and multiple-outlet solenoid valves corresponding to the experimental liquid pools 2 located on the same horizontal plane are preferably arranged on the corresponding mounting plate 7; the experimental liquid pools 2 set on each mounting plate 7 on the horizontal plane are respectively provided with a group of injection pumps 4, and the injection pumps 4 are preferably arranged on the corresponding mounting plate 7 to realize modular partitioning of the entire experimental liquid pool 2 for easy installation and debugging.

[0037] In combination with the above-mentioned implementation methods of the experimental liquid pool component, the liquid injection component, and the experimental data acquisition component, the present application provides the following embodiments for a small-scale spatial phase change heat transfer experimental device.

[0038] like Figure 2 As shown, the small-scale spatial phase change heat transfer experimental device provided in this application has a three-layer structural design, including nine evaporation tables, two of which are respectively arranged in two experimental liquid pools, which are independent experimental liquid pools 21, and the other seven evaporation tables are arranged in one experimental liquid pool, which is a combined experimental liquid pool 22.

[0039] The combined experimental liquid pool 22 is set on the first mounting plate 71, located on the top layer; the two independent experimental liquid pools 21 are set on the second mounting plate 72, located on the middle layer, and the combined experimental liquid pool 22 on the first mounting plate 71 and the independent experimental liquid pools 21 on the second mounting plate 72 are staggered with each other.

[0040] The first mounting plate 71 has through holes on the two independent experimental liquid pools 21, so that the first mounting plate 71 will not block the observation window 6 located above the two independent experimental liquid pools 21 in the vertical direction; the second mounting plate 72 does not cover the space below the combined experimental liquid pool 22 to provide the maximum space for the bottom of the support frame 1.

[0041] The two independent experimental liquid pools 21 and one combined experimental liquid pool 22 are used independently of each other and do not interfere with each other. By setting up two independent experimental liquid pools 21 and one combined experimental liquid pool 22, a variety of experiments can be completed, including but not limited to: the coupling effect of large-scale droplet evaporation and phase change heat transfer under different working conditions, the evaporation of thin liquid layers in space and the Marangoni effect, also known as the Marangoni effect, which is a physical phenomenon, referring to the coupling mechanism of the phenomenon of mass movement due to the presence of a tension gradient between the interfaces of two liquids with different surface tensions, the convection and phase change heat transfer enhancement effect of small-scale droplet evaporation in space under different evaporation base plate materials and different working conditions, the study of gas phase diffusion and density field distribution laws in the phase change process of evaporation of droplets and liquid layers of different spatial scales, and the study of non-equilibrium thermal effects of gas-liquid interface in the phase change process of evaporation of droplets of different spatial scales.

[0042] Combine Figure 3-Figure 5 As shown, the support frame 1 is a three-dimensional rectangular approximately cuboid frame structure, and a bottom plate 18 is provided at the bottom of the support frame 1 for installing structural members located in the bottom space of the support frame 1.

[0043] The first support frame 1 and the second support member 12 are provided upward on the bottom plate 18. The tops of the first support member 11 and the second support member 12 are in contact with the bottom of the first mounting plate 71. The first mounting plate 71 is fixed to the first support member 11 and the second support member 12 by bolts.

[0044] A third support member 13 and a fourth support member 14 are provided upward on the bottom plate 18. The side of the third support member 13 contacts the side of the second mounting plate 72, and the top of the second support member 12 contacts the bottom of the second mounting plate 72. The second mounting plate 72 is installed and fixed on the third support member 13 and the fourth support member 14 by bolts.

[0045] The third support member 13 further extends upward so that the top of the third support member 13 contacts the bottom of the first mounting plate 71 , and the third support member 13 and the first mounting plate 71 are connected by bolts.

[0046] In order to further improve the stability of the entire experimental device, the support frame 1 has first support rods 15 horizontally arranged on the parallel sides that are in contact with the edges of the first mounting plate 71, and the first support rods 15 are used to connect with the first mounting plate 71; the support frame 1 has second support rods 16 horizontally arranged on the sides that are in contact with the edges of the second mounting plate 72, and the second support rods 16 are used to connect with the second mounting plate 72. Furthermore, the first support rods 15 and the second support rods 16 located on the same side are connected by a connecting rod 17 to form a whole.

[0047] The top of the support frame 1 is an open structure to avoid obstruction of the observation windows 6 located vertically above the two independent experimental liquid pools 21 and a combined experimental liquid pool 22, making it convenient for the observation equipment located above the entire device to observe and record the interior of the experimental liquid pool; the observation equipment here is an infrared thermal imager, which is used for infrared observation to obtain heat change data of droplets and liquid layers during the evaporation experiment.

[0048] Furthermore, when installing the two independent experimental liquid pools 21 and the combined experimental liquid pool 22, it is necessary to ensure that the observation window 6 on the side of the experimental liquid pool is facing the observation equipment located outside the support frame 1 (the observation window 6 on the side of the combined experimental liquid pool 22 is not marked in the figure) so that the observation equipment can observe and record the interior of the experimental liquid pool from the side. The observation equipment here selects a high-definition camera CCD or an optical densitometer to obtain the morphological change data of the droplets and liquid layers during the evaporation experiment.

[0049] It should be noted that in this embodiment, there is an independent experimental liquid pool 21 for conducting research on the non-equilibrium effect of the phase change interface of the evaporating droplet / liquid layer. In this experimental state, the entire experimental plane is perpendicular to the horizontal plane. Therefore, the temperature changes of the droplets and the liquid layer are preferably obtained by temperature sensors on the side. Due to the placement of the evaporation table, it is impossible to set up observation equipment on the side to obtain the morphological changes of the droplets and the liquid layer. The morphological changes of the droplets and the liquid layer can only be obtained by using the high-definition camera CC set above the entire device through the observation window 6 located above.

[0050] A reflector is provided inside the experimental liquid pool to reflect the morphological changes of the droplets and liquid layer on the evaporation table to the lens of the observation equipment above the experimental liquid pool to meet the observation requirements.

[0051] The evaporation tables in the two independent experimental liquid pools 21 and the one combined experimental liquid pool 22 are respectively provided with heating plates and multiple sensors. The heating plates are used to heat the droplets or liquid layers on the evaporation tables so that the droplets or liquid layers evaporate. The multiple sensors are respectively used to obtain the temperature change data of the droplets or liquid layers during the evaporation process, and to obtain the temperature data of the heating plates to control the heating plates; multiple power supply lines, data transmission lines and control lines are involved.

[0052] In order to facilitate the modular installation of the experimental liquid pool and avoid interference of related lines with the observation field of view; in this embodiment, sealing joints are provided on the side walls of two independent experimental liquid pools 21 and a combined experimental liquid pool 22. The sealing joints are used to integrate the power supply lines, data transmission lines and control lines in the experimental liquid pools, which are convenient for connection with external modules; at the same time, the space occupied by the phase lines is also constrained to avoid interference with the observation field of view.

[0053] Among them, the heating plate and sensor are conventional designs for evaporation experiments on an evaporation table, and have no impact on the overall structural design of the experimental device of this application. Therefore, they are not marked in the figure, and this application does not limit the structure and installation position of the heating plate and sensor.

[0054] In this embodiment, the main structure of the entire experimental device, including the support frame 1, the first mounting plate 71, the second mounting plate 72, the first support member 11, the second support member 12, the third support member 13, the fourth support member 14, the first support rod 15 and the second support rod 16 are made of metal; the metal material can be aluminum or magnesium-aluminum alloy. Aluminum has the advantages of light weight, high strength, good corrosion resistance, good processing performance, and easy regeneration. Magnesium-aluminum alloy has the advantages of light weight, high tensile strength, good load-bearing capacity, and high dimensional stability. The metal materials that can be selected include but are not limited to these and are not limited here.

[0055] Furthermore, in order to reduce weight, the first support member 11, the second support member 12, the third support member 13 and the fourth support member 14 all adopt a frame structure, which also makes it convenient for the lines and pipes inside the experimental device to pass through the first support member 11, the second support member 12, the third support member 13 or the fourth support member 14.

[0056] The selection of the above materials makes the main structure of the entire experimental device have certain mechanical properties, among which mechanical properties refer to the mechanical characteristics exhibited by materials when subjected to various external loads such as tension, compression, bending, torsion, impact, alternating stress, etc. under different ambient temperatures, media, and humidity; the mechanical properties of metals include the property of brittle materials not undergoing plastic deformation before damage, the ability of strong metal materials to resist permanent deformation or fracture under static loads, the ability of plastic metal materials to produce permanent deformation without damage under load, the ability of hard metal materials to resist the penetration of objects harder than them on the surface, the ability of ductile metal materials to resist impact loads without being damaged, fatigue strength material parts and structural parts to fatigue damage, elastic metal materials that can restore their original size when the external force disappears, the property of ductile materials to undergo a certain amount of plastic deformation before fracture under the action of tensile stress or compressive stress, the property of rigid metal materials to withstand higher stress without large strain, and the yield point or yield stress metal stress level, measured in MPa.

[0057] In order to achieve the above performance, the main structure of the entire experimental device needs to be subjected to a variety of tests, including but not limited to sinusoidal vibration tests, random vibration tests, impact tests, thermal cycle tests, aging tests and quality characteristic tests. The above tests are all tests that must be done before the space device is brought into space. Only after the space device has withstood various tests can it be brought into space for formal use. Parameters such as test conditions for each test need to be adaptively adjusted according to actual conditions.

[0058] The small-scale space phase change heat transfer experimental device provided in this embodiment has been successfully applied to the design of the space evaporation and condensation scientific experimental device of the first cargo spacecraft of my country's manned space program. Under the premise of meeting the lightweight requirements of the structure, the design of high structural stiffness and strength has withstood the mechanical environment of the spacecraft launch into orbit and successfully completed various on-orbit scientific experiments in space.

[0059] In this embodiment, the liquid injection assembly includes a liquid reservoir 3, a first liquid injection pump 4 and a second liquid injection pump 4. The two liquid injection pumps 4 respectively control the injection of the experimental liquid pools located on the two mounting plates 7, and inject the experimental working fluid in the liquid reservoir 3 into the evaporation table.

[0060] Among the seven evaporation tables in the combined experimental liquid pool 22, five evaporation tables form a group and the other two evaporation tables form a group. Therefore, the first injection pump 4 is connected to a one-inlet-two-outlet solenoid valve and a one-inlet-five-outlet solenoid valve through a three-way joint, respectively, to control the injection of one group of two evaporation tables and the other group of five evaporation tables; the second injection pump 4 controls the injection of the evaporation tables in the two independent experimental liquid pools 21 through a one-inlet-two-outlet solenoid valve.

[0061] The first injection pump 4 is mounted on the first mounting plate 71 , and the second injection pump 4 is mounted on the bottom plate 18 due to the limited area of ​​the second mounting plate 72 ; the liquid reservoir 3 is also mounted on the bottom plate 18 .

[0062] Multiple sets of solenoid valves (not shown in the figure) are preferably installed on the mounting plate where the corresponding experimental liquid pool is located. Taking the space of the entire experimental device under the experimental state as a reference, the solenoid valves can be set on the upper or lower surface of the mounting plate. The specific arrangement is not limited here.

[0063] In this embodiment, in addition to two independent experimental liquid pools 21, one combined experimental liquid pool 22 and a liquid injection component, it also includes a gas circulation system (not shown in the figure) and a temperature control system (not shown in the figure), etc. The gas circulation system and the temperature control system are used to respectively assist the independent experimental liquid pool 21 and the combined experimental liquid pool 22 in establishing temperature, pressure, ventilation and other test conditions. The structures corresponding to the gas circulation system and the temperature control system are all arranged in the main body of the device. Each structure not only needs to be completely stored in the main body of the device, but also needs to be connected to the independent experimental liquid pool 21 and the combined experimental liquid pool 22. At the same time, each structure is required not to block the line of sight of the monitoring device.

[0064] Since the space for the structural components related to the gas circulation system and the temperature control system is relatively small, the structural components are reasonably arranged in the device body on the premise of meeting the above conditions, so the specific arrangement method is not limited here.

[0065] The main body size of the small spatial phase change heat transfer experimental device provided in this embodiment is 545 mm×444.6 mm×257.6 mm. The effective volume ratio of this layout design is 59%, of which the proportion of pipelines and cables is about 3%.

[0066] The small-scale spatial phase change heat transfer experimental device provided in this embodiment achieves compactness of experimental units and functional components within a limited space through optimized layout and modular partitioning, and integrates a large number of structural components required for the experiment, as follows:

[0067] (1) A total of 512 cables (388 cables outside the liquid pool and 124 cables inside the liquid pool) and 10 connectors;

[0068] (2) There are 37 pipes and 53 connectors in total; there are 15 4mm hoses outside the liquid pool, 9 4mm hoses inside the liquid pool, 7 1 / 8-inch hard pipes outside the liquid pool, 6 6mm hard pipes outside the liquid pool, 18 4mm hose connectors inside the liquid pool, 4 1 / 8-inch compression fittings inside the liquid pool, 2 6mm compression fittings inside the liquid pool, 14 4mm hose connectors outside the liquid pool, 7 1 / 8-inch compression fittings outside the liquid pool, 4 6mm compression fittings outside the liquid pool, and 4 front panel plunger connectors;

[0069] (3) There are 19 solenoid valves, 7 gas phase solenoid valves, and 12 liquid phase solenoid valves;

[0070] (4) There are 40 thermocouples, 9 thermal flow sensors, 11 heating plates (including TEC), and 4 pressure sensors.

[0071] Therefore, the small-scale space phase change heat transfer experimental device provided in this application takes into account multiple aspects such as comprehensive technical feasibility, reliability, scientific research output, time nodes and economy, and especially combines the experimental space in the standard experimental cabinet in the space station cabin to realize a multi-layer space experimental device structure design with high structural strength, high load-to-structure mass ratio, modular partitioning, easy debugging and low cost.

[0072] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A small-scale spatial phase change heat transfer experimental device, comprising an experimental liquid pool component and a liquid injection component built into a support frame (1), characterized in that: The experimental liquid pool assembly comprises a plurality of experimental liquid pools (2), each of the experimental liquid pools (2) having at least one evaporation table; the plurality of experimental liquid pools (2) are horizontally arranged from top to bottom inside the support frame (1), and at least one experimental liquid pool (2) is arranged on each horizontal plane; the experimental liquid pools (2) on two adjacent horizontal planes do not overlap each other on a projection plane, and a space is reserved between the experimental liquid pool (2) located at the bottom and the bottom of the support frame (1); Observation windows (6) are provided above and on the sides of the experimental liquid pool (2), and the support frame (1) is unobstructed in the horizontal direction or vertical direction corresponding to the observation windows (6), so that an optical observation device arranged outside the support frame (1) can obtain image data of changes in droplets or liquid layers on the evaporation table through the observation windows (6); The liquid injection assembly comprises at least one liquid reservoir (3) and at least one group of liquid injection pumps (4); the liquid injection pumps (4) are used to inject the experimental working fluid in the liquid reservoir (3) into the evaporation table; the liquid injection pumps (4) are connected to the plurality of evaporation tables via at least one group of one-inlet and multiple-outlet solenoid valves; the liquid reservoir (3) and part of the structure of the liquid injection assembly are arranged in the bottom space of the support frame (1).

2. The method according to claim 1, wherein: The experimental liquid pool (2) located on the same horizontal plane and the one-inlet-multiple-outlet solenoid valve corresponding to the experimental liquid pool (2) located on the same horizontal plane are both arranged on the same mounting plate (7), and the mounting plate (7) is detachably connected to the support frame (1).

3. The method according to claim 2, wherein: Each of the experimental liquid pools (2) arranged on the mounting plate (7) is respectively provided with a corresponding set of injection pumps (4), and the injection pumps (4) are arranged on the corresponding mounting plate (7) or in the bottom space of the support frame (1).

4. The method according to claim 1, wherein: The plurality of experimental liquid pools (2) are distributed on the two support plates, and the observation windows (6) located above in the vertical direction in the experimental liquid pools (2) on the two support plates are not blocked.

5. The method according to claim 1, wherein: A sealing joint is provided on the side wall of the experimental liquid pool (2), and the sealing joint is used to connect the power supply line, data transmission line and control line in the experimental liquid pool (2) with an external module.

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