Modularized micro-channel and gas-liquid dual-purpose multi-parameter observation experiment platform

Abstract

The invention discloses a modularized micro-channel and a gas-liquid dual-purpose multi-parameter observation experiment platform. The modularized micro-channel comprises a base provided with a first groove body and a flow channel unit provided with an overflowing hole; and an experimental channel is formed by the base and the flow channel unit. The gas-liquid dual-purpose multi-parameter observation experiment platform comprises the modularized micro-channel. For a modularized micro-channel, a plurality of bases and a plurality of flow channel units are designed and manufactured by taking a modularized design idea as guidance, and the bases and the flow channel units are selected and assembled to form a required experimental channel according to specific experimental requirements, so that more accurate fluid characteristic data can be obtained; and strong and powerful support is provided for the design of the micro-channel heat exchanger. For the gas-liquid dual-purpose multi-parameter observation experiment platform, the gas experiment module is utilized to realize the cleaning, purging and drying functions of the liquid loop, so that the gas experiment module and the liquid experiment module share one set of micro-channel module, the gas-liquid dual-purpose is realized, and the economical efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid property experimental platforms, and in particular to a modular microchannel and gas-liquid dual-purpose multi-parameter observation experimental platform. Background Art

[0002] A PCHE (Printed Circuit Heat Exchanger), also known as a microchannel heat exchanger, is a new, highly efficient, high-temperature, and high-pressure resistant compact heat exchanger. In the early stages of microchannel heat exchanger design, due to the diverse heat transfer media, including liquids, gases, and even gas-liquid mixtures, using empirical formulas to calculate the Reynolds number often results in values ​​between 2000 and 4000. This means that the fluid in the narrow channel experiences both laminar and turbulent flow. Furthermore, to ensure adequate heat transfer, the flow channels of microchannel heat exchangers often have numerous bends, corners, and other directional changes. As the fluid passes through these structures, it undergoes sudden changes in direction and speed, further complicating the internal fluid state. Furthermore, in a fractal-designed microchannel heat exchanger, the flow channel is not a simple, narrow channel with a constant cross-section, but rather a fluid cavity with a specific array geometry. The Reynolds number for such a flow channel is difficult to calculate using empirical formulas.

[0003] Therefore, in the existing technology, the Reynolds number obtained according to the empirical formula is difficult to use for subsequent design, and it is impossible to obtain the accurate fluid state and the values ​​of velocity, pressure resistance, heat transfer, etc. required for the design, and it is even more impossible to obtain the spatial evolution process of the three-dimensional flow field structure.

[0004] In addition, during the Reynolds number measurement process, since gas and liquid experimental platforms are not universal, two sets of platforms are usually manufactured, which has a great impact on the experimental progress and quality, and the economic cost remains high. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing technology uses empirical formulas to obtain the Reynolds number of a microchannel heat exchanger and the experimental cost is high. The purpose is to provide a modular microchannel and gas-liquid dual-purpose multi-parameter observation experimental platform to solve the above problems.

[0006] The present invention is achieved through the following technical solutions: In a first aspect, the present invention provides a modular microchannel, comprising a base provided with a first trough body and a flow channel unit provided with a flow hole; The multiple bases are connected to form a channel base, and correspondingly, the multiple first troughs are connected to form an experimental trough; A plurality of flow channel units are connected to form a channel body that can be placed in a test tank, and correspondingly, a plurality of flow holes are connected to form a flow channel; The length of the channel body is greater than that of the experimental tank. Accordingly, when the channel body is inserted into the experimental tank to form an experimental channel, two adjacent flow channel units are pressed against each other.

[0007] In one possible design, a base at the end of the channel base is provided with a clamping plate extending into the first tank body, so that the length of the channel body is 3-5 mm longer than the length of the experimental tank; The flow channel unit is at least partially transparent to form a transparent observation area for parameter observation; Assemble the experimental channel as follows: S10: The base is loosely connected so that the temporary length of the experimental tank is greater than the channel body; S20: The flow channel units are placed into the experimental tank one by one, connected and formed into the channel body; S30: Connecting the bases again so that adjacent bases are tightly connected, and the length of the experimental tank is greater than the channel body so that adjacent flow channel units are pressed against each other; S40: Knock the runner unit so that its bottom is tightly attached to the corresponding base.

[0008] In a possible design, the flow channel unit includes a choke channel and multiple choke channels. The length of a choke channel is a fraction of the distance between two adjacent bases, and the length of the multiple choke channels is an integer multiple of the length of the choke channel.

[0009] In one possible design, the flow channel unit includes a diversion flow channel and a fractal flow channel. The flow holes of the diversion flow channel are provided with light grooves, broken line grooves, corrugated grooves or direct current grooves, and the flow holes of the fractal flow channel are constructed as several elliptical fractal holes, several leaf-shaped fractal holes or several honeycomb-shaped fractal holes.

[0010] In one possible design, the base has an abutment surface, and the base is provided with two second groove bodies adjacent to and respectively located at both ends of the abutment surface. Accordingly, one end and the bottom surface of the second groove body are connected to the outside world, and the side of the second groove body facing the abutment surface is constructed to be used to connect the legs of the adjacent bases, and the legs are provided with connecting holes.

[0011] In a possible design, a bolt and a nut for connection are provided on the first connection hole, the length of the bolt is y, the thickness of the nut is z, and the width of the supporting legs is x. Accordingly, 2x≤yz; Along the fluid flow direction, the cross-sectional length of the second slot body is greater than y; The height of the second slot body is smaller than the height of the corresponding base, so that the first connecting hole is close to the top surface of the base.

[0012] In one possible design, sub-grooves are provided at the ends of the first groove body. When two adjacent bases abut against each other, the two adjacent sub-grooves are connected to form an inner groove for applying sealant to the flow channel unit. Both sides of the base are provided with communication holes, which connect the outside with the inner groove.

[0013] In a possible design, when two adjacent flow channel units abut against each other, a sealant is coated on the abutting surfaces for sealing.

[0014] In one possible design, the sealant is a washable transparent silicone.

[0015] In one possible design, one of the flow channel units is plugged into the first slot of one of the bases to connect the two. Accordingly, the connected base and flow channel unit form a module. The flow holes of the flow channel unit are made by 3D printing, chemical etching or machining, and the roughness of the flow holes is controlled by spraying transparent silicone.

[0016] In one possible design, when chemically etching or machining, a 1mm-2mm thick upper sealing plate is provided on the embryonic block, and adhesive and a pull-out piece are filled between the upper sealing plate and the embryonic block, and the length of the pull-out piece is greater than the length of the embryonic block; when the adhesive is completely solidified to connect the embryonic block and the upper sealing plate to form a module, the pull-out piece is pulled out and the excess adhesive is taken away.

[0017] In a second aspect, the present invention provides a gas-liquid dual-purpose multi-parameter observation experimental platform based on the modular microchannel, comprising a gas experiment module, a liquid experiment module, a microchannel module and a data acquisition module connected in parallel, wherein the gas experiment module and the microchannel module constitute a gas experiment circuit, the liquid experiment module and the microchannel module constitute a liquid experiment circuit, the microchannel module includes the modular microchannel, and the data acquisition module is used to observe the modular microchannel and collect data; The gas experiment module includes a fan, a compressor and a heater connected in series. The fan, the compressor and the heater are used for experiments on the gas experiment circuit and for cleaning and drying the liquid experiment circuit.

[0018] In one possible design, the gas experiment module also includes: An air storage tank, a first switch valve and a filter are located upstream of the fan and connected in series; The compressor has two outlets, which are respectively connected to the microchannel module through pipes, one of which is provided with a second switch valve, and the other is connected in series with a third switch valve and the heater; And, the heater is an electric heater.

[0019] In one possible design, an aerosol module is further included in parallel with the gas experiment module. The aerosol module includes a fifteenth switch valve, an aerosol generator, a storage tank and a fourth switch valve connected in series. The aerosol module is connected to the microchannel module through the fourth switch valve.

[0020] In one possible design, the microchannel module includes a first mixing unit, a second mixing unit, and the modular microchannel connected in series; The first mixing unit includes a first DC circuit and a mixing circuit connected in parallel, the first DC circuit is provided with a sixth switch valve, and the first mixing circuit is connected in series with a fifth switch valve and a mixer; The second mixing unit includes a second DC circuit and a flow stabilization circuit connected in parallel. The second DC circuit is provided with a seventh switch valve. The flow stabilization circuit is connected in series with an eighth switch valve and a flow stabilizer.

[0021] In one possible design, the liquid experiment module includes a tenth switch valve, a pump body, a water tank and a ninth switch valve connected in series, and the connection between the liquid experiment module and the microchannel module is located between the first mixing unit and the second mixing unit.

[0022] In one possible design, a twelfth on-off valve and a fourteenth on-off valve are sequentially connected in series downstream of the modular microchannel, and the twelfth on-off valve is located downstream of the connection between the tenth on-off valve and the modular microchannel; The twelfth switch valve is connected in parallel with a filter circuit, the filter circuit is connected in series with the eleventh switch valve and the filter separator, the fourteenth switch valve is connected in parallel with a cooling circuit, the cooling circuit is connected in series with the thirteenth switch valve and the cooler.

[0023] In one possible design, a recovery loop connected to the aerosol module is provided on the filter separator, the connection between the recovery loop and the aerosol module is located between the storage tank and the fourth switch valve, and the recovery loop is connected in series with the recovery tank and the sixteenth switch valve.

[0024] In one possible design, the data acquisition module includes a data acquisition device and a data processing system. The data acquisition device includes a high-speed camera, a laser Doppler velocimeter, a laser generator and a sensor. The sensor is set outside the modular microchannel, and the data processing system is used to process the collected data.

[0025] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. For modular microchannels, guided by the modular design concept, several bases and several flow channel units are designed and manufactured. According to the specific experimental requirements, the bases and flow channel units are selected and assembled to form the required experimental channels. This can obtain more accurate fluid characteristic data and provide strong support for the design of microchannel heat exchangers.

[0026] 2. For the gas-liquid dual-purpose multi-parameter observation experimental platform, the gas experiment module is used to realize the cleaning, purging and drying functions of the liquid circuit, so that the gas experiment module and the liquid experiment module share a set of microchannel modules, which improves the utilization rate of the gas experiment module equipment, improves the economy, reduces the economic burden of the experiment, and reduces the cost of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the examples. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort. In the drawings: Figure 1 A schematic diagram of the base structure.

[0028] Figure 2 It is a structural diagram of the base located at the end of the channel base.

[0029] Figure 3 It is a structural diagram of the base located at the corner of the channel base.

[0030] Figure 4 Schematic diagram of the structure of the base equipped with the flow channel unit.

[0031] Figure 5 Schematic diagram of the structure of a fractal flow channel with an elliptical fractal hole.

[0032] Figure 6 Schematic diagram of the structure of a fractal flow channel with leaf-shaped fractal holes.

[0033] Figure 7 Schematic diagram of the structure of a fractal flow channel with honeycomb-shaped fractal holes.

[0034] Figure 8 Schematic diagram of the structure of a modular microchannel that is L-shaped when the flow channel unit is viewed from perspective.

[0035] Figure 9 for Figure 8 Schematic diagram of the perspective structure.

[0036] Figure 10 A schematic diagram of the structure of a modular microchannel with five sections of flow channels in a straight line when the flow channel unit is viewed from perspective.

[0037] Figure 11 This is a structural diagram of the gas-liquid dual-purpose multi-parameter observation experimental platform.

[0038] Markings and corresponding parts names in the accompanying drawings: 1. Module; 2. Base; 21. First trough; 22. Second trough; 23. Leg; 24. Card; 25. Flow channel; 3. Flow channel unit; 31. Flow hole; 41. Inner groove; 42. Connecting hole; 101. Fan; 102. Compressor; 103. Heater; 104. Gas tank; 105. First on-off valve; 106. Filter; 107. Second on-off valve; 108. Third on-off valve; 201. Tenth on-off valve; 202. Pump body; 203. Water tank; 204. Ninth on-off valve; 301. Sixth on-off valve; 302. Fifth on-off valve; 303. Mixing 15. On-off valve; 304. Seventh on-off valve; 305. Eighth on-off valve; 306. Flow stabilizer; 307. Twelfth on-off valve; 308. Fourteenth on-off valve; 401. Data processing system; 402. High-speed camera; 403. Laser Doppler velocimeter; 404. Laser generator; 405. Sensor; 501. Fifteenth on-off valve; 502. Aerosol generator; 503. Storage tank; 504. Fourth on-off valve; 601. Eleventh on-off valve; 602. Filter separator; 701. Thirteenth on-off valve; 702. Cooler; 801. Recovery tank; 802. Sixteenth on-off valve. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples and drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0040] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that these specific details are not necessarily required to practice the present invention. In other embodiments, well-known structures, circuits, materials, or methods are not described in detail to avoid obscuring the present invention.

[0041] Throughout this specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Therefore, appearances of the phrases "one embodiment," "an embodiment," "an example," or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combinations and / or subcombinations. Furthermore, it will be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes only and are not necessarily drawn to scale. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0042] In the description of the present invention, the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0043] Example 1: In addition to using empirical formulas, in microchannel heat exchanger design, since the flow channels often have numerous directional structures such as bends and corners, the flow channels also form fluid cavities with a certain array geometry. Based on this, it is feasible to obtain the fluid properties of a certain flow channel structure through experimental methods. However, if the flow channel structure is changed, the relevant experimental flow channels must also be redesigned and replaced, which makes the experimental acquisition of fluid properties costly.

[0044] In view of this, a modular microchannel is provided, specifically: Figures 1-10 As shown, a modular microchannel includes a base 2 provided with a first trough 21 and a flow channel unit 3 provided with a flow hole 31; The multiple bases 2 are connected to form a channel base, and correspondingly, the multiple first tanks 21 are connected to form an experimental tank; The plurality of flow channel units 3 are connected to form a channel body that can be placed in the experimental tank. Accordingly, the plurality of flow holes 31 are connected to form a flow channel. The length of the channel body is greater than that of the experimental tank. Accordingly, when the channel body is inserted into the experimental tank to form an experimental channel, two adjacent flow channel units 3 are pressed against each other.

[0045] Among them, guided by the modular design concept, several bases 2 and several flow channel units 3 are designed and manufactured. According to the specific experimental requirements, the base 2 and the flow channel unit 3 are selected to assemble to form the required experimental channel, and the experimental channel is used to complete the experiment. Specifically, the experimental channel has a flow channel, and the fluid flows along the flow channel. At the same time, the data of relevant fluid characteristics are observed and recorded, thereby providing data support for subsequent design work. Based on this, the modular microchannel can obtain more accurate fluid characteristic data, provide strong support for the design of the microchannel heat exchanger, and greatly improve the heat dissipation effect of the microchannel heat exchanger.

[0046] After the experiment is complete, the experimental channel is disassembled and the components are separated. When the experiment is needed again, the components are selected and assembled according to the specific experimental requirements to meet the individual needs of the corresponding experiment and improve the accuracy of the data. Based on this, the modular microchannel is not only reusable but also can meet the personalized needs of a single experiment, effectively reducing experimental costs while ensuring experimental quality.

[0047] It is worth noting that for the experimental channel assembled by the base 2 and the flow channel unit 3, its sealing is a prerequisite for ensuring the normal use of the experimental channel. In this regard, in the modular microchannel, the length of the channel body is greater than the length of the experimental tank. When the channel body is plugged into the experimental tank, the two adjacent flow channel units are pressed against each other to form a primary seal and prevent fluid leakage. Based on this, the modular microchannel achieves sealing through structural improvements, without the need for additional sealing components or sealing structures, and the cost of design and manufacturing is lower; sealing can be achieved through assembly, reducing intermediate processes and making it more convenient to use.

[0048] As will be readily understood, if the modular microchannel is used in a microchannel heat exchanger, and the microchannel radiator is relatively small, the experimental channel will also be relatively small. In this case, the equipment used for fluid property testing will be difficult to fit within the flow channel. Therefore, the flow channel unit 3 is at least partially transparent to form a transparent observation area for parameter observation, facilitating observation and data recording from outside the experimental channel. Alternatively, both the base 2 and the flow channel unit 3 can be made of transparent materials to render the experimental channel transparent, facilitating observation and data recording from any suitable angle.

[0049] The flow holes 31, which form a flow channel within the experimental channel, vary in parameters such as groove type and surface roughness to meet different experimental requirements, facilitating observation of corresponding fluid characteristics such as flow state, wall morphology, vortex level, instantaneous velocity, and local pressure differential. Furthermore, based on the above results, a data processing system 401 is used to determine the degree of fluid turbulence and piezoresistance under varying roughness and channel configurations, as well as the degree to which the channel configuration enhances or suppresses turbulent vortices.

[0050] In one possible implementation, a retaining plate 24 extending into the first tank body is provided on the base 2 at the end of the channel base, thereby making the channel body 3-5 mm longer than the length of the experimental tank. Therefore, the retaining plate 24 is used to shorten the length of the first tank body, ensuring that two adjacent flow channel units 3 can abut against each other.

[0051] Alternatively, as Figure 1 As shown, the clamping plate 24 is constructed as a frame-shaped plate and forms a flow channel opening 25 at the end of the base 2. It is easy to understand that the clamping plate 24 can also be constructed in any other suitable shape.

[0052] Preferably, the experimental channel is assembled by the following method: S10: The base 2 is loosely connected so that the temporary length of the experimental tank is greater than the channel body; S20: The flow channel units 3 are placed into the experimental tank one by one, connected and formed into a channel body; S30: reconnecting the bases 2 so that adjacent bases 2 are tightly connected, and the length of the experimental tank is greater than the channel body so that adjacent flow channel units 3 are pressed against each other; S40 : knocking the flow channel unit 3 so that its bottom is in close contact with the corresponding base 2 .

[0053] Based on this, compared to the assembly method of assembling the channel base and the channel body separately and then inserting the channel body into the experimental tank, this helps reduce the wear of the flow channel unit 3 at the end of the channel body, and the shape of the flow channel unit 3 is more complete, which helps to improve the sealing and service life. It is easy to understand that in S40, it is preferred to strike with a rubber hammer to minimize damage to the flow channel unit 3.

[0054] In one possible implementation, the flow channel unit 3 is at least partially transparent to form a transparent observation area for parameter observation, thereby facilitating observation and data recording from outside the experimental channel.

[0055] In a possible implementation, the flow channel unit 3 includes a choke channel and multiple choke channels. The length of a choke channel is a fraction of the distance between two adjacent bases 2 , and the length of the multiple choke channels is an integer multiple of the length of a choke channel.

[0056] Based on the above design scheme, multi-section runners are designed and manufactured with the length of one section as the benchmark, and the multi-section runners are used to quickly fill the length to speed up the splicing speed and improve the assembly speed.

[0057] Generally, multi-section flow channels include a two-section flow channel (twice as long as a single-section flow channel), a three-section flow channel (three times as long as a single-section flow channel), and a four-section flow channel (four times as long as a single-section flow channel). A number of two-section flow channels, three-section flow channels, and four-section flow channels are provided for selection. If necessary, flow channel units 3 with longer lengths, such as five-section flow channels and six-section flow channels, can also be manufactured.

[0058] Regarding the groove type of the flow channel unit 3, in a possible implementation, the flow channel unit 3 includes a diversion flow channel and a fractal flow channel, and the flow hole 31 of the diversion flow channel is provided with a light groove, a broken line groove, a corrugated groove or a direct current groove, and the flow hole 31 of the fractal flow channel is constructed as a plurality of elliptical fractal holes, a plurality of leaf-shaped fractal holes or a plurality of honeycomb-shaped fractal holes.

[0059] Based on the above design, any appropriate number of diversion channels and / or fractal channels can be selected according to specific experimental requirements to complete the corresponding experiment. That is, the modular microchannel provides a variety of flow channel units 3 for selection to meet more experimental requirements and broaden the scope of application.

[0060] It is easy to understand that the groove types of the diversion channel include but are not limited to the light groove, broken line groove, corrugated groove and direct current groove, and the fractal holes of the fractal channel include but are not limited to the elliptical fractal hole, leaf-shaped fractal hole and honeycomb-shaped fractal hole, and both can also be constructed into any other suitable shape.

[0061] It is worth noting that the lengths and flow channel types of the flow channel units 3 can be combined with each other, so that there are more styles of the flow channel units 3 and the range of choices for the staff is larger.

[0062] Further, if Figure 4-Figure 7 As shown, the flow hole 31 is configured as a square groove. Alternatively, the flow hole 31 can also be configured in any other suitable shape. Accordingly, the groove of the diversion flow channel is set in the middle of the bottom surface of the flow hole 31. Optionally, the groove can also be set at any suitable position of the flow hole 31.

[0063] In one possible implementation, the base 2 has an abutment surface, and the base 2 is provided with two second groove bodies 22 adjacent to and respectively located at both ends of the abutment surface. Accordingly, one end and the bottom surface of the second groove body 22 are connected to the outside world, and the side of the second groove body 22 facing the abutment surface is constructed as a support leg 23 for connecting the adjacent base, and a connecting hole is provided on the support leg 23.

[0064] Based on the above design, if Figures 1-4 As shown, the design of the second slot 22 provides an open slot on the base 2 with both bottom and side openings, which reduces weight. During assembly and disassembly of the channel base, the second slot 22 can also serve as a fulcrum for applying force, making assembly and disassembly of the experimental channel more convenient.

[0065] In order to achieve a sealing method in which two adjacent flow channel units 3 are pressed against each other, a connecting hole is provided on the support leg 23 in combination with the structure of the base 2. A connecting rod is provided through the connecting hole to provide a force. When the channel body is inserted into the experimental tank, and the length of the channel body is greater than the length of the experimental tank, the force provided by the connecting rod acts on the flow channel unit 3, so that the two adjacent flow channel units 3 are pressed against each other, thereby improving the sealing of the experimental channel. Specifically, in one possible implementation, a bolt and nut for connection are provided on the first connecting hole, the length of the bolt is y, the thickness of the nut is z, and the width of the support leg 23 is x. Accordingly, 2x≤yz; Along the fluid flow direction, the cross-sectional length of the second slot body 22 is greater than y; The height of the second slot 22 is smaller than the height of the corresponding base 2 , so that the first connecting hole is close to the top surface of the base 2 .

[0066] Based on the above design, when two adjacent bases 2 are connected, the two adjacent legs 23 are pressed against each other, with bolts and nuts as connecting rods, and 2x≤yz, ensuring the connection strength while ensuring that the legs 23 will not be deformed or damaged.

[0067] Furthermore, the cross-sectional length of the opening slot is required to be greater than y to ensure that the bolts have sufficient space for assembly and disassembly, improving the convenience and flexibility of assembly and disassembly. At the same time, the height of the opening slot is limited to ensure that the bolts are inserted as much as possible, ensuring that the flow channel unit 3 is subjected to a greater tightening force and a better sealing effect.

[0068] For experimental channels, the tight contact between two adjacent flow channel units 3 can achieve a certain degree of sealing, but there is always a gap between the two adjacent flow channel units 3. To address this gap, in one possible implementation, each end of the first groove body 21 is provided with a sub-groove body. When two adjacent bases 2 abut against each other, the two adjacent sub-grooves are connected to form an inner groove 41 for applying sealant to the flow channel units 3. Both sides of the base 2 are provided with communication holes 42 , which connect the outside with the inner groove 41 .

[0069] Based on the above design, the structure of the first trough 21 is improved by machining a proportionally enlarged sub-trough at the end of the first trough 21, forming a stepped structure between the sub-trough and the main portion of the first trough 21. When the bases 2 are pressed together, the sub-troughs of two adjacent bases 2 connect to form an inner groove 41. Sealant is applied through the inner groove 41 to the seams of the side and bottom abutting surfaces of the flow channel unit 3, forming a secondary seal and sealing the gap.

[0070] Based on this, the amount of glue injected between two adjacent flow channel units 3 is increased to form a sealing layer covering the gap. Furthermore, the primary seal and the secondary seal cooperate with each other to keep the experimental channel in a leak-free static sealing state.

[0071] Alternatively, in general, such as Figure 1 As shown, sub-troughs are provided on both sides of the base 2. In special cases, such as Figure 2 As shown, a sub-trough body is provided on one side of the base 2 at the end of the channel base; Figure 3 As shown, a plurality of sub-grooves are provided on the base 2 at the corner of the channel base, wherein some of the sub-grooves form inner grooves 41 to facilitate the application of sealant to the plurality of flow channel units 3 located at the corner.

[0072] Optionally, after tightening the nuts and fixing two adjacent bases 2, a flat long plate with a width of 4mm-6mm is selected to apply sealant.

[0073] If you are not sure about the coordination between the primary seal and the secondary seal, further sealing can be performed. Specifically, in one possible implementation, when two adjacent flow channel units 3 abut against each other, a sealant for sealing is coated on the abutting surfaces.

[0074] Based on the above design, before the base 2 is abutted, a sealant is applied to the abutting surface. After the nut is tightened, the sealant is squeezed to form a sealing film, achieving a triple seal for the experimental channel. Thus, under the action of the triple seal, the experimental channel is in a leak-free static sealing state.

[0075] It is worth noting that if sealant is used for secondary and tertiary sealing, in order to ensure that the components can be reused, in one possible implementation, the sealant is made of washable transparent organic silicone.

[0076] Based on this, the transparent organic silicone can be soaked or wiped with an ethanol solvent, causing the transparent organic silicone to dissolve and fall off, allowing adjacent components to be separated from each other. After further cleaning, the components can be reused multiple times. Moreover, the transparent organic silicone will not affect the observation effect.

[0077] It is easy to understand that, on the basis of ensuring the normal progress of the experiment and the sealing performance, the sealant can also be selected from any other suitable existing models.

[0078] During the use of the base 2 and the flow channel unit 3, some common combinations may appear. In this case, in order to improve the convenience of use, in a possible implementation, as shown in FIG. Figure 4 As shown, one of the flow channel units 3 is plugged into the first slot 21 of one of the bases 2 so that the two are connected. Accordingly, the connected base 2 and flow channel unit 3 form a module 1 .

[0079] Based on the above design scheme, the staff selects the corresponding module 1 and then connects it through the connecting rod, which helps to improve the efficiency of the experiment.

[0080] In one possible implementation, the flow hole 31 of the flow channel unit 3 is manufactured by 3D printing, chemical etching, or machining, and the roughness of the flow hole 31 is controlled by spraying transparent silicone. Based on this, the flow channel unit 3 can be manufactured using any suitable processing method, and the present invention does not impose any restrictions on this.

[0081] Optionally, when 3D printing is used, the flow channel unit 3 is made of a transparent hard resin material.

[0082] Alternatively, when using transparent silicone spraying, the desired flow path roughness can be achieved by adjusting spraying parameters such as pressure, distance, and speed to control the distribution and grain size of the silicone material within the module 1. Using this method, the silicone-sprayed module 1 can be soaked or wiped with ethanol to remove the silicone grains, then rinsed with clean water. The rinsed module 1 can then be repeatedly sprayed to produce different roughness levels, thus reducing experimental costs.

[0083] Optionally, when chemically etching or machining is performed, a 1mm-2mm thick upper cover plate is placed over the block. Adhesive and a puller are placed between the upper cover plate and the block, with the puller being longer than the block. Once the adhesive has completely solidified, connecting the block to the upper cover plate to form module 1, the puller is removed, removing any excess adhesive. Furthermore, the thinness of the upper cover plate allows for the installation of a temperature sensor to measure the flow field temperature.

[0084] Based on this, when module 1 is manufactured, the processing parameters are controlled to obtain groove structures with different groove types and roughness. When multiple modules 1 are assembled to form an experimental channel, the flow channel can have a variety of layout styles through the combination of groove types and roughness to meet different experimental requirements.

[0085] Example 2: This embodiment introduces a gas-liquid dual-purpose multi-parameter observation experimental platform based on the modular microchannel described in Example 1. Specifically: like Figure 11 As shown, a gas-liquid dual-purpose multi-parameter observation experimental platform includes a gas experiment module, a liquid experiment module, a microchannel module and a data acquisition module connected in parallel. The gas experiment module and the microchannel module form a gas experiment circuit, the liquid experiment module and the microchannel module form a liquid experiment circuit, the microchannel module includes the modular microchannel, and the data acquisition module is used to observe the modular microchannel and collect data; The gas experiment module includes a fan 101, a compressor 102 and a heater 103 connected in series. The fan 101, the compressor 102 and the heater 103 are used for experiments in the gas experiment loop and for cleaning and drying the liquid experiment loop.

[0086] Among them, by applying the modular microchannel described in Example 1 in the microchannel module, the gas-liquid dual-purpose multi-parameter observation experimental platform can complete the measurement of fluid properties under different experimental requirements, provide accurate data for subsequent work, and help improve the quality of subsequent work.

[0087] In addition, the relevant experimental platforms used in the existing technology are dedicated to gas experiments or liquid experiments, that is, gas and liquid experimental platforms are not universal, and two sets of experimental platforms often need to be prepared. The above difficulties have resulted in long experimental procurement and manufacturing cycles and high economic costs.

[0088] The gas-liquid dual-use multi-parameter observation experimental platform not only expands the scope of experimental objects through the modular microchannel, but also realizes the universality of gas and liquid, reduces the economic burden of the experiment, and lowers the cost of the experiment. The structure shares a set of microchannel modules. For different experiments, such as the gas experiment platform, it must be kept clean and dry; the liquid experiment platform must also be connected to an external heat source for processing and drying, and an external gas source for cleaning and purging before the experiment. To this end, the gas-liquid dual-purpose multi-parameter observation experiment platform is equipped with a fan 101, a compressor 102 and a heater 103 on the gas experiment module, which can drive the gas flow in the gas experiment and can also be cleaned, purged and dried before the liquid experiment to meet the requirements of the liquid experiment for the pipeline. Furthermore, when switching between gas experiments and liquid experiments, a clean and dry pipeline environment is created by cleaning, purging and drying to facilitate subsequent experiments.

[0089] Based on this, the gas-liquid dual-purpose multi-parameter observation experimental platform makes multiple uses of the heat and gas supply of the gas experimental module, improves the equipment utilization rate of the gas experimental module, and enables gas experiments and liquid experiments to share the same set of microchannel modules, effectively reducing equipment costs and saving experimental funds.

[0090] In addition, during the experiment, the heater 103 can also be used to heat the fluid so that the observed fluid has room temperature and different high temperatures. The functions of the gas-liquid dual-purpose multi-parameter observation experimental platform are more abundant, providing more diverse data for subsequent design.

[0091] The dual-use gas-liquid multi-parameter observation experimental platform also includes an aerosol module connected in parallel to the gas experiment module. The difficulty in gas observation experiments lies in colorless gas tracing, and fluorescent materials are one of the few options. However, the fluorescent particles used for gas tracing are used in very small quantities. After being recovered into the gas storage tank 104, they easily adhere to the tank wall. Solid-state adsorption by the tank material gradually degrades the fluorescent effect, making them difficult to reuse and unable to support long-term cyclic gas experiments.

[0092] Based on this, the required fluorescent aerosol is prepared through the aerosol module, and the experimental platform is supplied with fluorescent aerosol for a long time to ensure that the circulating gas experiment can be carried out smoothly.

[0093] In a possible implementation, the gas experiment module further includes: An air storage tank 104, a first switch valve 105 and a filter 106 are located upstream of the fan 101 and connected in series; The compressor 102 has two outlets, which are connected to the microchannel module through pipes. One of the pipes is provided with a second switch valve 107, and the other pipe is connected in series with a third switch valve 108 and the heater 103. Furthermore, the heater 103 is an electric heater.

[0094] Based on the above design scheme, the gas experiment module is equipped with multiple measuring devices, including but not limited to pressure meters and flow meters, to respectively detect the pressure, flow and other data of the fan 101, compressor 102, heater 103 and pipeline to ensure the accuracy of the gas flow during the experiment.

[0095] The first on-off valve 105, the second on-off valve 107 and the third on-off valve 108 cooperate with each other to control the on-off status of the gas experiment module to achieve the required function. In response to the change in the power of the fan 101, the gas flow rate is adjusted to the required value for the experiment in a timely manner.

[0096] The compressor 102 is not only used to provide the required experimental pressure for the gas experiment, but also can provide a high-pressure jet gas flow of 0.5 MPa-2.5 MPa when the aerosol module prepares the aerosol.

[0097] Heater 103 can not only heat the fluid and dry the pipe, but also provide heat for aerosol preparation. Preferably, heater 103 is equipped with a temperature feedback processing system to make timely adjustments to temperature changes detected in the circuit, ensuring that the experimental circuit maintains a specific temperature above room temperature.

[0098] In a possible implementation, the aerosol module includes a fifteenth switch valve 501 , an aerosol generator 502 , a storage tank 503 , and a fourth switch valve 504 connected in series. The aerosol module is connected to the microchannel module via the fourth switch valve 504 .

[0099] Based on this design, the fluorescent aerosol produced by aerosol generator 502 is temporarily stored in storage tank 503. When needed for gas experiments, the aerosol module connects to the microchannel module and releases the fluorescent aerosol. Furthermore, storage tank 503 works in conjunction with recovery tank 801 in the recovery loop to provide overpressure protection, enhancing experimental safety.

[0100] For gas experiments, the tracer can be either fluorescent aerosol or fluorescent microparticles. Specifically, fluorescent microparticles are used for short-term experiments, while fluorescent aerosols are used for long-term experiments. Furthermore, when fluorescent microparticles are used as tracers, they include but are not limited to organic fluorescent dyes, quantum dots, and rare earth fluorescent materials. The aerosol includes a load material and the fluorescent microparticles. The load material can be fumed silica, sodium sulfate, potassium phosphate, sodium chloride, potassium chloride, or a polymer. The polymer can include at least one of polyurethane, polyvinyl alcohol, gelatin, polyamide, and polystyrene.

[0101] When preparing the aerosol, a high-pressure jet airflow is provided by the compressor 102. After passing through the aerosol generator 502, the high-pressure jet airflow brings the aerosol material into the storage tank 503, and causes the fluorescent particles to be adsorbed on the load material, and then fully contact with the aerosol to mix into a fluorescent aerosol, and then enter and be stored in the storage tank 503.

[0102] When the gas to be traced and the tracer are mixed by the mixer 303 , the tracer needs to be added to the gas to be traced slowly and evenly. At this time, the amount and speed of the tracer added are controlled by the fourth switch valve 504 .

[0103] The storage tank 503 is preferably a high-pressure tank. If a sudden failure causes the compressor 102 to eject airflow for a long time, causing the storage tank 503 to be overpressured, overpressure protection can be achieved by releasing the pressure into the recovery loop.

[0104] In one possible implementation, the microchannel module includes a first mixing unit, a second mixing unit, and the modular microchannel connected in series; The first mixing unit includes a first DC circuit and a mixing circuit connected in parallel, the first DC circuit is provided with a sixth switch valve 301, and the first mixing circuit is connected in series with a fifth switch valve 302 and a mixer 303; The second mixing unit includes a second DC circuit and a flow stabilization circuit connected in parallel. The second DC circuit is provided with a seventh switch valve 304 , and the flow stabilization circuit is connected in series with an eighth switch valve 305 and a flow stabilizer 306 .

[0105] Based on the above design, the first mixing unit heats the fluid through the mixing circuit to keep the fluid at the desired temperature. The second mixing unit is used to obtain a stable flow or turbulent flow to observe the stabilization effect of the modular microchannel on turbulent gas and liquid flows.

[0106] Optionally, the flow stabilizer 306 may be a honeycomb flow stabilizer 306 to stabilize the pulsation and turbulence in the incoming flow, so that the fluid enters the modular microchannel stably and evenly.

[0107] In one possible implementation, the liquid experiment module includes a tenth switch valve 201, a pump body 202, a water tank 203 and a ninth switch valve 204 connected in series, and the connection between the liquid experiment module and the microchannel module is located between the first mixing unit and the second mixing unit.

[0108] Based on the above design, the pump body 202 is used to drive the flow of liquid, and the liquid is stored in the water tank 203. According to the experimental purpose, the liquid can be mixed with a dye medium or fluorescent tracer particles.

[0109] In one possible implementation, a twelfth switch valve 307 and a fourteenth switch valve 308 are sequentially connected in series downstream of the modular microchannel, and the twelfth switch valve 307 is located downstream of the connection between the tenth switch valve 201 and the modular microchannel; The twelfth switch valve 307 is connected in parallel with a filter circuit, the filter circuit is connected in series with the eleventh switch valve 601 and the filter separator 602 ; the fourteenth switch valve 308 is connected in parallel with a cooling circuit, the cooling circuit is connected in series with the thirteenth switch valve 701 and the cooler 702 .

[0110] Based on the above design, the filtration circuit separates fluorescent aerosols or fluorescent particles from the gas through the filter separator 602. The cooling circuit cools the fluid in time to protect downstream equipment.

[0111] In one possible implementation, a recovery loop connected to the aerosol module is provided on the filter separator 602, and the connection between the recovery loop and the aerosol module is located between the storage tank 503 and the fourth switch valve 504, and the recovery loop is connected in series with a recovery tank 801 and a sixteenth switch valve 802.

[0112] Based on the above design scheme, the fluorescent aerosol or fluorescent particles separated by the filter separator 602 are recovered through the recovery loop and stored in the recovery tank 801. If necessary, the fluorescent particles or fluorescent aerosol collected in the recovery tank 801 can be taken out and poured into the storage tank 503 for repeated use.

[0113] In one possible implementation, the data acquisition module includes a data acquisition device and a data processing system 401. The data acquisition device includes a high-speed camera 402, a laser Doppler velocimeter 403, a laser generator 404 and a sensor 405. The sensor 405 is set outside the modular microchannel, and the data processing system 401 is used to process the collected data.

[0114] Based on the above design, a high-speed camera 402, a laser Doppler velocimeter 403, and a laser generator 404 observe and collect data from the fluid within the modular microchannel through the transparent observation area. The sensor 405 can be any suitable existing model. The data processing system 401 can also be any suitable existing model.

[0115] Now, in combination with the structure of the gas-liquid dual-purpose multi-parameter observation experimental platform, the functions of the gas-liquid dual-purpose multi-parameter observation experimental platform are described. Specifically, they include but are not limited to the following functions: Function 1: Open the eighth on-off valve 305, the ninth on-off valve 204, and the tenth on-off valve 201, and close the remaining valves. This will create a tracer liquid experimental circuit with a stable flow.

[0116] Function 2: Open the seventh on-off valve 304, the ninth on-off valve 204, and the tenth on-off valve 201, and close the remaining valves. This can create a tracer liquid experimental circuit with a turbulent flow.

[0117] Function 3: Open the first on-off valve 105, the second on-off valve 107, the sixth on-off valve 301, the seventh on-off valve 304, the twelfth on-off valve 307, and the fourteenth on-off valve 308, and close the remaining valves. This creates a gas circuit at room temperature with a purge cleaning function.

[0118] Function 4: Open the first on-off valve 105, the third on-off valve 108, the sixth on-off valve 301, the seventh on-off valve 304, the twelfth on-off valve 307, and the thirteenth on-off valve 701, and close the remaining valves. This creates a high-temperature gas circuit with purge, cleaning, and drying functions.

[0119] Function 5: Open the first on-off valve 105, the third on-off valve 108, the fourth on-off valve 504, the fifth on-off valve 302, the eighth on-off valve 305, the eleventh on-off valve 601, and the thirteenth on-off valve 701. Close the remaining valves. This creates a tracer gas experimental circuit with a specific high temperature and a stable flow.

[0120] Function 6: Open the first on-off valve 105, the third on-off valve 108, the fourth on-off valve 504, the fifth on-off valve 302, the seventh on-off valve 304, the eleventh on-off valve 601, and the thirteenth on-off valve 701. Close the remaining valves. This creates a tracer gas experimental circuit with a specific high temperature and turbulent flow.

[0121] Function 7: Briefly open the first on-off valve 105 , the second on-off valve 107 , and the fifteenth on-off valve 501 , and close the remaining valves. This function enables the fluorescent aerosol preparation, produces fluorescent aerosol, and stores it in the storage tank 503 .

[0122] Function 8: Open the sixteenth on-off valve 802 and close the remaining valves. This provides circuit overpressure protection. That is, when preparing fluorescent aerosol using Function 7, if storage tank 503 becomes overpressured, opening the sixteenth on-off valve 802 releases the pressure and releases some of the fluorescent aerosol into recovery tank 801. Recovery tank 801 not only stores the recovered fluorescent material and fluorescent aerosol, but also provides pressure relief and overpressure protection.

[0123] Example 3: This embodiment, based on Examples 1 and 2, illustrates the use of the gas-liquid dual-purpose multi-parameter observation experimental platform, as follows: Example 1: S10: For the modular microchannel, see Figure 3 , assembling to form an experimental channel with five single-section flow channels; opening and closing each on-off valve according to Function 4 in Example 2 to obtain a tracer gas experimental circuit with a specific high temperature and stable flow. A high-speed camera 402, a laser Doppler velocimeter 403, and a pressure meter were used as data acquisition equipment to obtain images and data such as the flow channel inlet and outlet pressures, the overall pressure drop, the flow velocity at key locations, and the fluid morphology and vortex formation within the flow channel.

[0124] S20: For the modular microchannel, select a flow channel in S10, see Figure 4 , assembled to form an experimental channel with four single-section flow channels; opening and closing each on-off valve according to function 5 in Example 2, a tracer gas experimental circuit with a specific high temperature and stable flow was obtained. A high-speed camera 402, a laser Doppler velocimeter 403, and a pressure meter were used as data acquisition equipment to obtain images and data such as the flow channel inlet and outlet pressures, the overall pressure drop, the flow velocity at key locations, and the fluid morphology and vortex formation within the flow channel.

[0125] S30: The pressure drop data obtained in S10 is subtracted from the pressure drop data obtained in S20 to obtain the pressure drop data of one section of the flow channel.

[0126] S40: The pressure drop data obtained in S10, the pressure drop data obtained in S20, and the pressure drop data obtained in S30 are respectively divided by the corresponding total length of the flow channel to obtain pressure drop data per unit length based on a specific roughness and a specific groove type.

[0127] It is worth noting that, if necessary, the above steps can be repeated to form an experimental channel using different numbers of flow channel sections to obtain the overall trend of pressure drop as the flow channel length changes and a more accurate pressure drop value per unit length.

[0128] Furthermore, the above trends and unit pressure drop can serve as a basis for the design of module 1 with this type of groove at this roughness. Furthermore, the images and data of the observed overall pressure drop of the flow channel, flow velocity at key locations, and the fluid morphology and vortex morphology within the flow channel can serve as a basis for research on the turbulence, mimicry, and vorticity of this module 1.

[0129] Example 2: S10: For the modular microchannel, see Figure 1, assembled to form an L-shaped experimental channel; the on-off valves were opened and closed according to Function 1 in Example 2 to obtain a tracer liquid experimental circuit with a stable inflow. A high-speed camera 402, a laser Doppler velocimeter 403, and a pressure meter were used as data acquisition equipment to obtain images and data such as the inlet and outlet pressures of the flow channel, the overall pressure drop of the flow channel, the flow velocity at key locations, and the fluid morphology and vortex formation within the flow channel.

[0130] S20: For the modular microchannel, see Figure 3 , assembled to form a linear experimental channel; opening and closing each on-off valve according to Function 1 in Example 2 to obtain a tracer gas experimental circuit with a specific high temperature and stable flow. A high-speed camera 402, a laser Doppler velocimeter 403, and a pressure meter were used as data acquisition equipment to obtain images and data such as the inlet and outlet pressures, the overall pressure drop, the flow velocity at key locations, and the fluid morphology and vortex formation within the channel.

[0131] S30: The pressure drop data obtained in S10 is subtracted from the pressure drop data obtained in S20 to obtain the pressure drop data of the corner.

[0132] It is worth noting that, based on the specific roughness and groove shape, the pressure drop data of S30 can serve as the design basis for this type of corner flow channel. Furthermore, the images and data of the overall pressure drop of the flow channel, the flow velocity at key locations, and the flow morphology and vortex form within the flow channel can serve as the basis for research on the turbulence, mimicry, and vorticity of this module 1.

[0133] Example 3: For the modular microchannel, a base 2 and a diversion channel are used to form an experimental channel. At least one fractal channel, such as multiple channels with elliptical fractal holes, is placed within the experimental channel. The on-off valves are opened and closed according to function 6 in Example 2 to obtain a tracer gas experimental circuit with a specific high temperature and turbulent flow. A high-speed camera 402, a laser Doppler velocimeter 403, and a pressure meter are used as data acquisition equipment to obtain the design and research basis for the corresponding fractal channel, including the pressure drop per unit length, the degree of turbulence, and the flow stabilization effect.

[0134] Example 4: The various on-off valves are opened and closed based on function 7 of embodiment 2 to prepare an appropriate amount of fluorescent aerosol. During the preparation, if there is an overpressure phenomenon, the various on-off valves are opened and closed based on function 8 of embodiment 2 to protect the experimental equipment.

[0135] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A modular microchannel, characterized in that: It comprises a base (2) provided with a first trough (21) and a flow channel unit (3) provided with a flow hole (31); A plurality of bases (2) are connected to form a channel base, and correspondingly, a plurality of first tank bodies (21) are connected to form an experimental tank; A plurality of flow channel units (3) are connected to form a channel body that can be placed in a test tank, and correspondingly, a plurality of flow holes (31) are connected to form a flow channel; The length of the channel body is greater than the length of the experimental tank. Accordingly, when the channel body is inserted into the experimental tank and forms an experimental channel, two adjacent flow channel units (3) are pressed against each other.

2. The modular microchannel according to claim 1, characterized in that A base (2) located at the end of the channel base is provided with a clamping plate (24) extending into the first tank body, so that the length of the channel body is 3-5 mm longer than the length of the experimental tank; The flow channel unit (3) is at least partially transparent to form a transparent observation area for parameter observation; The experimental channel was assembled by the following method: S10: The base (2) is loosely connected so that the temporary length of the experimental tank is greater than the channel body; S20: The flow channel units (3) are placed into the experimental tank one by one, connected and formed into the channel body; S30: reconnecting the bases (2) so that adjacent bases (2) are tightly connected, and the length of the experimental tank is greater than the channel body so that adjacent flow channel units (3) are pressed against each other; S40: Knock the flow channel unit (3) so that its bottom is in close contact with the corresponding base (2).

3. The modular microchannel according to claim 2, characterized in that The flow channel unit (3) comprises a single-section flow channel and multiple-section flow channels. The length of a single-section flow channel is a fraction of the distance between two adjacent bases (2), and the length of the multiple-section flow channel is an integer multiple of the length of the single-section flow channel.

4. The modular microchannel according to claim 3, characterized in that The flow channel unit (3) includes a diverter flow channel and a fractal flow channel. The flow hole (31) of the diverter flow channel is provided with a light groove, a broken line groove, a corrugated groove or a direct current groove. The flow hole (31) of the fractal flow channel is constructed as a plurality of elliptical fractal holes, a plurality of leaf-shaped fractal holes or a plurality of honeycomb-shaped fractal holes.

5. The modular microchannel according to claim 1, characterized in that The base (2) has an abutting surface. The base (2) is provided with two second grooves (22) adjacent to and respectively located at both ends of the abutting surface. Accordingly, one end and the bottom surface of the second groove (22) are both connected to the outside world. The side of the second groove (22) facing the abutting surface is configured to be used for connecting a support leg (23) of an adjacent base (2). The support leg (23) is provided with a connecting hole.

6. The modular microchannel according to claim 5, characterized in that The first connecting hole is provided with a bolt and nut for connection, the length of the bolt is y, the thickness of the nut is z, and the width of the supporting legs (23) is x, and accordingly, 2x≤yz; Along the fluid flow direction, the cross-sectional length of the second groove body (22) is greater than y; The height of the second trough (22) is smaller than the height of the corresponding base (2), so that the first connecting hole is close to the top surface of the base (2).

7. The modular microchannel according to claim 2, characterized in that The ends of the first trough body (21) are each provided with a sub-trough body, and when two adjacent bases (2) abut against each other, the two adjacent sub-trough bodies are connected to form an inner groove (41) for applying sealant to the flow channel unit (3); Both side surfaces of the base (2) are provided with communication holes (42), and the communication holes (42) communicate with the outside and the inner groove (41).

8. The modular microchannel according to claim 7, characterized in that When two adjacent flow channel units (3) abut against each other, a sealant for sealing is coated on the abutting surfaces.

9. The modular microchannel according to claim 8, characterized in that The sealant should be washable transparent silicone.

10. The modular microchannel according to any one of claims 1 to 9, characterized in that One of the flow channel units (3) is plugged into the first slot (21) of one of the bases (2) so that the two are connected. Accordingly, the connected base (2) and flow channel unit (3) form a module (1); The flow hole (31) of the flow channel unit (3) is made by 3D printing, chemical etching or machining, and the roughness of the flow hole (31) is controlled by spraying transparent silicone.

11. The modular microchannel according to claim 10, characterized in that: When chemical etching or machining is performed, a 1mm-2mm thick upper sealing plate is provided on the embryo block, and adhesive and a drawer are filled between the upper sealing plate and the embryo block, and the length of the drawer is greater than the length of the embryo block; when the adhesive is completely solidified so that the embryo block and the upper sealing plate are connected to form a module (1), the drawer is pulled out and excess adhesive is taken away.

12. A gas-liquid dual-purpose multi-parameter observation experimental platform based on a modular microchannel according to any one of claims 1 to 11, characterized in that: It includes a gas experiment module, a liquid experiment module, a microchannel module and a data acquisition module connected in parallel. The gas experiment module and the microchannel module form a gas experiment circuit, the liquid experiment module and the microchannel module form a liquid experiment circuit, the microchannel module includes the modular microchannel, and the data acquisition module is used to observe the modular microchannel and collect data; The gas experiment module includes a fan (101), a compressor (102) and a heater (103) which are connected in series. The fan (101), the compressor (102) and the heater (103) are used for experiments of the gas experiment circuit and for cleaning and drying of the liquid experiment circuit.

13. The gas-liquid dual-purpose multi-parameter observation experimental platform according to claim 12 is characterized in that: The gas experiment module also includes: An air storage tank (104), a first switch valve (105), and a filter (106) are located upstream of the fan (101) and are sequentially connected in series; The compressor (102) has two outlets, and the two outlets are connected to the microchannel module through pipelines, wherein a second switch valve (107) is provided on one of the pipelines, and a third switch valve (108) and the heater (103) are connected in series on the other pipeline; Furthermore, the heater (103) is an electric heater.

14. The gas-liquid dual-purpose multi-parameter observation experimental platform according to claim 12, characterized in that: It also includes an aerosol module connected in parallel to the gas experiment module, the aerosol module includes a fifteenth switch valve (501), an aerosol generator (502), a storage tank (503) and a fourth switch valve (504) connected in series in sequence, and the aerosol module is connected to the microchannel module via the fourth switch valve (504).

15. The gas-liquid dual-purpose multi-parameter observation experimental platform according to claim 14 is characterized in that: The microchannel module comprises a first mixing unit, a second mixing unit and the modular microchannel connected in series; The first mixing unit comprises a first DC circuit and a mixing circuit connected in parallel, the first DC circuit is provided with a sixth switch valve (301), and the first mixing circuit is connected in series with a fifth switch valve (302) and a mixer (303); The second mixing unit comprises a second DC circuit and a flow stabilization circuit connected in parallel with each other, a seventh switch valve (304) is provided on the second DC circuit, and an eighth switch valve (305) and a flow stabilizer (306) are connected in series on the flow stabilization circuit.

16. The gas-liquid dual-purpose multi-parameter observation experimental platform according to claim 15, characterized in that: The liquid experiment module comprises a tenth switch valve (201), a pump body (202), a water tank (203) and a ninth switch valve (204) which are sequentially connected in series, and the connection between the liquid experiment module and the microchannel module is located between the first mixing unit and the second mixing unit.

17. The gas-liquid dual-purpose multi-parameter observation experimental platform according to claim 16, characterized in that: A twelfth switch valve (307) and a fourteenth switch valve (308) are sequentially connected in series downstream of the modular microchannel, and the twelfth switch valve (307) is located downstream of the connection between the tenth switch valve (201) and the modular microchannel; The twelfth switch valve (307) is connected in parallel with a filter circuit, and the eleventh switch valve (601) and the filter separator (602) are connected in series to the filter circuit. The fourteenth switch valve (308) is connected in parallel with a cooling circuit, and the thirteenth switch valve (701) and the cooler (702) are connected in series to the cooling circuit.

18. The gas-liquid dual-purpose multi-parameter observation experimental platform according to claim 17, characterized in that: A recovery circuit connected to the aerosol module is provided on the filter separator (602). The connection between the recovery circuit and the aerosol module is located between the storage tank (503) and the fourth switch valve (504). The recovery circuit is connected in series with a recovery tank (801) and a sixteenth switch valve (802).

19. The gas-liquid dual-purpose multi-parameter observation experimental platform according to any one of claims 12 to 18, characterized in that: The data acquisition module includes a data acquisition device and a data processing system (401). The data acquisition device includes a high-speed camera (402), a laser Doppler velocimeter (403), a laser generator (404) and a sensor (405). The sensor (405) is arranged outside the modular microchannel. The data processing system (401) is used to process the acquired data.

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