Micro-channel fluid treatment device and fluid mixing method

Abstract

The invention provides a micro-channel fluid treatment device and a fluid mixing method.The micro-channel fluid treatment device comprises a mixing chamber, a feeding channel, a discharging channel and a radiator, the mixing chamber has the length direction x, the width direction y and the height direction z, the maximum section of the plane formed by the mixing chamber in the length direction x and the width direction y is oval, and the maximum section of the plane formed by the mixing chamber in the height direction z is oval. The eccentricity e of the ellipse is 0.30-0.95, the feeding channel and the discharging channel are arranged at the two ends of the mixing chamber in the length direction respectively, and the radiation axis of the radiator is parallel to the plane formed by the length direction x and the width direction y and points to the interior of the mixing chamber. According to the device provided by the invention, different fluids, especially fluids with relatively large viscosity difference, can be fully mixed, and the fluctuation of fluid feeding can be effectively compensated, so that the fluids flowing out of the discharging channel are uniformly mixed and distributed in the flowing direction, and the fluctuation of product performance is reduced, so that better rapid uniform mixing is realized.

Description

Technical Field

[0001] The present application relates to the field of fluid mixing, and in particular to a microchannel fluid processing device and a fluid mixing method. Background Art

[0002] Mixing different fluids is common in the cosmetics, food, coatings, electronic slurries, rubber plastics, fine chemicals and other industries. Compared with the mixing of fluids with similar viscosities, the mixing of fluids with large viscosity differences faces greater difficulties. This is because fluids with large viscosity differences have large surface tension and rheological properties, making it difficult to achieve rapid mixing in a low-pressure resistance manner at the microscopic level. Studies have shown that combining ultrasound with microchannels is a method for achieving continuous mixing of fluids with different viscosities. For example, patent CN201410102972.1 combines an ultrasonic transducer with a fluid pipeline, uniformly introduces ultrasonic energy into the fluid pipeline, and uses the ultrasonic cavitation effect to generate a large number of micron-sized cavitation bubbles in the fluid macro, thereby effectively enhancing the mixing of liquids.

[0003] However, in industrial production, fluid pumping often fluctuates, such as the fluctuation of the pumping flow of a peristaltic pump over time, or the fluctuation of the material density over time caused by the presence of discontinuous phases such as bubbles in the material. Traditional ultrasonic microchannel mixers are mainly based on plug flow, which can achieve rapid and uniform mixing of materials in the radial direction (perpendicular to the flow direction), but cannot achieve effective back mixing in the axial direction, and thus cannot effectively compensate for the fluctuation of the fluid feed, resulting in fluctuations in the performance of the export product. Summary of the invention

[0004] In view of the above problems, the present application provides a microchannel fluid processing device and a method for continuously mixing fluids using the microchannel fluid processing device. The technical solution of the present application is as follows:

[0005] 1. A microchannel fluid processing device, comprising: a mixing chamber, a feed channel, a discharge channel and a radiator,

[0006] The mixing chamber has a length direction x, a width direction y, and a height direction z.

[0007] The maximum cross-section of the plane formed by the mixing chamber in the length direction x and the width direction y is an ellipse.

[0008] The eccentricity e of the ellipse is 0.30 to 0.95,

[0009] The feed channel and the discharge channel are respectively arranged at two ends of the mixing chamber in the length direction.

[0010] The radiation axis of the radiator is parallel to a plane formed by the length direction x and the width direction y, and points to the mixing chamber.

[0011] 2. The microchannel fluid processing device according to item 1, wherein:

[0012] The length of the major semi-axis of the ellipse is 20 to 90 mm.

[0013] 3. The microchannel fluid processing device according to item 1, wherein:

[0014] The ratio of the length of the major semi-axis of the ellipse to the diameter of the area equivalent circle of the radiation surface of the radiator is 5-20.

[0015] 4. The microchannel fluid processing device according to item 1, wherein:

[0016] The radiation axis of the radiator is located in the plane where the ellipse is located and points to the center of the ellipse. The angle between the radiation axis and the major axis of the ellipse is 20° to 90°.

[0017] 5. The microchannel fluid processing device according to item 1, wherein:

[0018] The radiator includes irradiating the mixing chamber with acoustic energy.

[0019] 6. The microchannel fluid processing device according to item 1, wherein:

[0020] The mixing chamber has an upper main surface, a lower main surface, and a side wall. The upper main surface and the lower main surface are parallel to a plane formed by the length direction x and the width direction y. The upper main surface and the lower main surface define the height of the mixing chamber.

[0021] 7. The microchannel fluid processing device according to item 6, wherein:

[0022] The radiator is located on the side wall and close to one side of the discharge channel.

[0023] 8. A method for fluid mixing, comprising:

[0024] Different fluids are mixed through the microchannel fluid processing device described in any one of items 1 to 7 above.

[0025] 9. The method according to claim 8, wherein:

[0026] The different fluids include low-viscosity fluids and high-viscosity fluids;

[0027] Preferably,

[0028] The viscosity of the high-viscosity fluid is greater than 100 cp, and the viscosity of the low-viscosity fluid is less than 100 cp.

[0029] 10. The product prepared by the microchannel fluid processing device described in any one of items 1 to 7 or the method described in item 8 or 9.

[0030] The microchannel fluid processing device provided in the present application can fully mix different fluids, especially fluids with large viscosity differences, and can effectively compensate for fluctuations in fluid feed, so that the fluid flowing out of the discharge channel is evenly mixed and distributed in the flow direction, reducing product performance fluctuations, thereby achieving better rapid mixing.

[0031] The above description is only an overview of the technical solution of the present application. In order to make the technical means of the present application clearer and to enable those skilled in the art to implement it according to the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are exemplified below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 : A schematic diagram of the side view of a microchannel fluid processing device in one embodiment of the present application;

[0033] Figure 2 : A schematic diagram of the front cross-sectional structure of a microchannel fluid processing device in one embodiment of the present application;

[0034] Figure 3 : A schematic diagram of the top cross-sectional structure of a microchannel fluid processing device in one embodiment of the present application.

[0035] Description of reference numerals:

[0036] 10. Mixing chamber shell; 11. Upper main surface; 12. Lower main surface; 13. Side wall;

[0037] 20. Feed channel;

[0038] 30. Discharging channel;

[0039] 40. Radiator;

[0040] 50. Mixing chamber. DETAILED DESCRIPTION

[0041] The following embodiments of the present application are only used to illustrate the specific embodiments of the present application, and these embodiments cannot be understood as limiting the present application. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present application are deemed to be equivalent replacement methods and fall within the scope of protection of the present application.

[0042] Those skilled in the art should understand that, in the disclosure of the present application, the terms "first", "second", "third", "fourth", "fifth", etc. are only used to distinguish different structures, but do not limit the number, connection relationship, etc. of specific structures; in addition, the directions or positional relationships indicated by "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limitations on the present application.

[0043] Regarding the "length", "width" and "height" of the present application, the present application defines them through the minimum bounding box method, that is, constructing a minimum bounding box (rectangular block) that can completely surround the space occupied by the mixing chamber. At this time, "length" refers to the longest side of the bounding box, and "width" and "height" refer to the other two sides of the bounding box. It should be noted that the sizes of "width" and "height" may be equal or either one may be larger than the other.

[0044] Correspondingly, the direction of "long" is the "length direction" (such as Figure 1 to Figure 3 The x direction in the figure), the direction where the width is located is the "width direction" (such as Figure 1 to Figure 3 The y direction in the figure), and the direction of "height" is the "height direction" (such as Figure 1 to Figure 3 in the z direction).

[0045] In the present application, the dimensions of the mixing chamber in terms of “length”, “width” and “height” are referred to as the length, width and height of the mixing chamber, respectively.

[0046] In the present application, a radiator refers to a component that can radiate energy outward to mix different fluids, such as radiating acoustic energy, electrical energy, magnetic energy, electromagnetic energy or other energy.

[0047] In this application, the "radiation surface" of a radiator refers to the part of the radiator where the radiating unit radiates energy through energy conversion, etc. For example, for an ultrasonic transducer (a radiator that radiates sound energy), the radiation surface is the area in the ultrasonic transducer that can generate mechanical vibrations, and its structure includes, for example, piezoelectric materials, vibrating diaphragms, or other transducer elements.

[0048] In this application, the "radiation axis" of a radiator refers to the axis of the "radiation surface" of the radiator, which is an imaginary straight line extending vertically outward from the center of the radiation surface, and can reflect the radiation direction of the radiator. For example, for an ultrasonic transducer, its "radiation axis" (also called "acoustic axis") refers to the axis of the "radiation surface" of the ultrasonic transducer, which is an imaginary straight line extending vertically outward from the center of the radiation surface of the ultrasonic transducer.

[0049] In the present application, the major axis, minor axis, semi-major axis, semi-minor axis, eccentricity e, etc. of the ellipse are all common parameters of the ellipse in geometry and will not be described in detail in the present application.

[0050] In the present application, the “diameter of an area equivalent circle” refers to the diameter of a circle when the area of ​​a shape is equal to the area of ​​the circle.

[0051] The present application provides a microchannel fluid processing device, such as Figures 1 to 3 As shown, it includes: a mixing chamber 50, a feed channel 20, a discharge channel 30 and a radiator 40,

[0052] The mixing chamber has a length direction x, a width direction y, and a height direction z.

[0053] The ratio of the length to the width of the mixing chamber is 2 to 30, for example, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, or any value and range therebetween.

[0054] In some specific embodiments, the maximum cross-section of the plane formed by the mixing chamber in the length direction x and the width direction y is an ellipse, and the eccentricity e of the ellipse is 0.30 to 0.95, for example, it can be 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, or any value and range therebetween.

[0055] In some specific embodiments, the mixing chamber 50 can be surrounded by a mixing chamber housing 10, that is, the microchannel fluid processing device of the present application can include a mixing chamber housing 10, and the mixing chamber 50 is formed in the mixing chamber housing 10. Regarding the material of the mixing chamber housing 10, metal materials and / or polymer materials can be used.

[0056] In some specific embodiments, regarding the specific structure of the mixing chamber 50, such as Figure 1 to Figure 3 As shown, in this embodiment, it has an upper main surface 11, a lower main surface 12, and a side wall 13. The upper main surface 11 and the lower main surface 12 are parallel to the plane formed by the length direction x and the width direction y, and the upper main surface and the lower main surface define the height of the mixing chamber.

[0057] In some specific embodiments, the feed channel and the discharge channel are respectively arranged at two ends of the mixing chamber in the length direction.

[0058] In some more specific embodiments, the feed channel and the discharge channel are respectively arranged at two ends of the long axis of the ellipse.

[0059] In some specific embodiments, the radiation axis of the radiator is parallel to the plane formed by the length direction x and the width direction y, and points to the mixing chamber.

[0060] In some more specific embodiments, the radiation axis of the radiator is located in the plane where the ellipse is located and points to the center of the ellipse.

[0061] In some more specific embodiments, the angle between the radiation axis and the major axis of the ellipse is 20° to 90°, for example, it can be 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, or any value and range therebetween, so as to improve the mixing efficiency of the fluid, further make the mixing distribution of the fluid flowing out of the discharge channel 30 more uniform in the axial direction (flow direction), and further reduce product performance fluctuations.

[0062] In some more specific embodiments, the radiator is located on the side wall and close to one side of the discharge channel.

[0063] Regarding the length a of the major semi-axis of the ellipse, in the present embodiment, it is specifically 20 to 90 mm, for example, it can be 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, 80 mm, 85 mm, 90 mm, or any value and range therebetween.

[0064] In some specific embodiments, the ratio (a / d) of the length a of the major semi-axis of the ellipse to the diameter d of the area equivalent circle of the radiation surface of the radiator is 5 to 20, for example, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, or any value and range therebetween. This can improve the mixing efficiency of the fluid, further make the mixing distribution of the fluid flowing out of the discharge channel 30 more uniform in the axial direction (flow direction), and further reduce the fluctuation of product performance.

[0065] In addition, regarding the size of the feed channel and the discharge channel, the diameter of the circle equivalent to the cross-sectional area of ​​the feed channel and / or the discharge channel is 3 mm to 7 mm, for example, it can be 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, or any value and range therebetween.

[0066] In some specific embodiments, the ratio of the height of the mixing chamber to the diameter of the cross-sectional area equivalent circle of the feed channel and / or the discharge channel is 0.8-3.0, for example, 0.8, 0.9,

[0067] 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, or any value or range therebetween.

[0068] In some specific embodiments, the ratio of "the area of ​​the maximum cross-section of the plane formed by the mixing chamber in the width direction y and the height direction z" to "the cross-sectional area of ​​the feed channel or the discharge channel perpendicular to the flow direction" is 2 to 20, for example, it can be 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, or any value and range therebetween.

[0069] In the present application, the radiator includes radiating the mixing chamber with sound energy. For parameters such as the power of radiation, those skilled in the art can make appropriate selections according to the combination of fluids to be mixed. More specifically, the radiator used in the present embodiment is an ultrasonic transducer. Preferably, the ultrasonic transducer has an operating frequency of 10 to 50 Hz, such as 10 Hz, 15 Hz, 20 Hz, 25 Hz, 30 Hz, 35 Hz, 40 Hz, 45 Hz, 50 Hz, or any value and range therebetween, and a power of 100 to 300 W, such as 100 W, 150 W, 200 W, 250 W, 300 W, or any value and range therebetween.

[0070] The present application also provides a method for fluid mixing, which uses the above-mentioned microchannel fluid processing device to mix different fluids.

[0071] In some specific embodiments, the different fluids include low-viscosity fluids and high-viscosity fluids. More specifically, they can be multiple low-viscosity fluids, multiple high-viscosity fluids, or low-viscosity fluids and high-viscosity fluids.

[0072] The high viscosity fluid refers to a fluid with a viscosity greater than 100 cp, for example, 101 cp, 500 cp, 1000 cp, 2000 cp, 3000 cp, 4000 cp, 5000 cp, 6000 cp, 7000 cp, 8000 cp, 9000 cp, 10000 cp, 20000 cp, 30000 cp, 40000 cp, 50000 cp, 60000 cp, 70000 cp, 80000 cp, 90 ...0 cp, 200000 cp, 300000 cp, 400000 cp, 500000 cp, 600000 cp, 700000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, 800000 cp, The present invention relates to a material having a molecular weight of 0.001 ~ 0.002 cp, or any value and range therebetween, preferably 200~200000 cp.

[0073] The viscosity of the low viscosity fluid refers to a fluid below 100 cp, for example, it can be 1 cp, 10 cp, 20 cp, 30 cp, 40 cp, 50 cp, 60 cp, 70 cp, 80 cp, 90 cp, 100 cp, or any value and range therebetween, preferably 0.1 to 100 cp.

[0074] In some specific embodiments, the viscosity difference between the high viscosity fluid and the low viscosity fluid is at least 100 cp.

[0075] Fluids with large viscosity differences have large surface tension and rheological property differences, making it more difficult to achieve rapid mixing at the microscopic level. Therefore, this application uses fluids with large viscosity differences as an example to verify the mixing performance of the above-mentioned microchannel fluid processing device, but the above-mentioned microchannel fluid processing device is not limited to mixing fluids with large viscosity differences, and fluids with similar or identical viscosities can achieve better mixing effects.

[0076] The feed rates of different fluids may be the same or different, and specifically may be 1 to 200 ml / min, for example, 1 ml / min, 5 ml / min, 10 ml / min, 15 ml / min, 20 ml / min, 25 ml / min, 30 ml / min, 35 ml / min, 40 ml / min, 45 ml / min, 50 ml / min, 55 ml / min, 60 ml / min, 65 ml / min, 70 ml / min, 75 ml / min, 80 ml / min, 85 ml / min, 90 ml / min, 95 ml / min, 100 ml / min, 110 ml / min, 120 ml / min, 130 ml / min, 140 ml / min, 150 ml / min, 160 ml / min, 170 ml / min, 180 ml / min, 190 ml / min, 200 ml / min, or any value and range therebetween.

[0077] When the fluid has different viscosities, the fluid can enter the mixing chamber at different flow rates. The flow rate of the fluid with higher viscosity (such as high viscosity fluid) can be 1-50 ml / min, and the flow rate of the fluid with lower viscosity (such as low viscosity fluid) can be 1-200 ml / min.

[0078] During mixing, different fluids can be combined through a T-type tee or a Y-type tee and then enter the mixing chamber 10 from the feed channel 20 , and then flow out from the discharge channel 30 after mixing.

[0079] The present application also provides a microchannel fluid processing device as described above or a product prepared by the method as described above.

[0080] In some specific embodiments, the product has low performance fluctuation.

[0081] In some specific embodiments, the coefficient of variation (C·V value) of the product is less than 10%, for example, it can be 9.9%, 9.5%, 9.0%, 8.5%, 8.0%, 7.5%, 7.0%, 6.5%, 6.0%, 5.5%, 5.0%, 4.5%, 4.0%, 3.5%, 3.0%, 2.5%, 2.0%, 1.5%, 1.0%, 0.5%, 0.1%, or any value and range therebetween, preferably less than 5%.

[0082] In some specific embodiments, the dosage form of the product can be, for example, a cream, a lotion, a gel, etc.

[0083] Through the above-mentioned microchannel fluid processing device provided by the present application, as shown in the results of the following Examples 1 to 19 and Comparative Examples 1 to 2, the coefficient of variation (C·V value) of Examples 1 to 19 is less than 10%, preferably less than 5%, which indicates that the above-mentioned microchannel fluid processing device provided by the present application is capable of fully mixing different fluids, especially high-viscosity fluids and low-viscosity fluids with large viscosity differences, effectively compensating for fluctuations in fluid feed, and reducing performance fluctuations of the fluid flowing out of the discharge channel 30.

[0084] Example

[0085] Table 1 shows the specifications of the microchannel fluid processing device used in the following Examples 1 to 19 and Comparative Examples 1 to 2. Among them, the mixing chambers of Examples 1 to 19 and Comparative Example 1 all include parallel upper and lower main surfaces, and side walls, the height of which (the distance between the upper and lower main surfaces) is 8 mm. The side walls of Examples 1 to 19 are surrounded to form an ellipse, and the structure is shown in FIG. Figure 1 to Figure 3 , parameters are detailed in Table 1. The side walls of Comparative Example 1 are surrounded to form a square with no eccentricity. Comparative Example 2 is a straight tube with no eccentricity. The diameter of the feed channel and the discharge channel in the microchannel fluid processing device used in Examples 1 to 19 and Comparative Examples 1 to 2 is 5 mm. In Comparative Example 1, the ultrasonic transducer is arranged on the side wall of the square and is perpendicular to the inlet and outlet connection line. In Comparative Example 2, the ultrasonic transducer is arranged on the channel wall and is perpendicular to the length direction of the channel.

[0086] The following experiments were conducted using the microchannel fluid processing devices of Examples 1 to 19 and Comparative Examples 1 to 2.

[0087] A constant flow plunger pump (model: JJRZ-10004F, manufactured by Hangzhou Jingjin Technology Co., Ltd.) is used to transport high-viscosity fluid (10% concentration of PVA (polyvinyl alcohol, model P105124-2.5kg, manufactured by Aladdin Company) aqueous solution, viscosity of 1080cp), and the flow rate is set to 9ml / min; a peristaltic pump (model: dPOFLEX GPH01, manufactured by Lange Constant Flow Pump Co., Ltd.) is used to transport low-viscosity fluid (deionized water, viscosity of 1cp), the peristaltic pump speed is 6rpm (accompanied by a flow fluctuation of 0.1Hz), and the average flow rate is 9ml / min. The two fluids are contacted through a T-type three-way and enter the mixing chamber through the feed channel. The mixing chamber shell is made of stainless steel (for Comparative Example 2, there is only one pipeline). The ultrasonic transducer is arranged on the mixing chamber as shown in the figure. The shell of the ultrasonic transducer is made of titanium alloy, the radiation unit is piezoelectric ceramic, the operating frequency is 20kHz, and the power is 150W.

[0088] After the experimental device has been running for 5 minutes, samples are taken from the discharge channel to test the mixing effect. Samples are taken every 18 seconds, each sample is 5 seconds, about 1.5 mL, and a total of 6 samples are taken. Each sample is weighed to obtain the weight Mi. The sample is then placed in an oven at 105°C to dry, remove moisture, and obtain the mass Ni of PVA in each sample. In this way, the mass fraction of PVA in each sample can be obtained Ci = Ni / Mi. According to the standard deviation σ and the average value of the mass fraction Ci of PVA in the 6 samples Calculate its coefficient of variation (C·V value):

[0089]

[0090] The C·V value reflects the fluctuation of PVA concentration in each sample, and the smaller the C·V, the smaller the fluctuation.

[0091] The C·V values ​​of Examples 1 to 19 and Comparative Examples 1 to 2 are shown in Table 1.

[0092] Table 1: Mixing chamber parameters and detection C·V values

[0093]

[0094]

[0095] Note:

[0096] In Examples 1 to 19, a is the length of the major semi-axis of the ellipse, and in Comparative Example 1, a is half the length of the side of the square;

[0097] d is the diameter of the area equivalent circle of the radiating surface of the ultrasonic transducer;

[0098] e is the eccentricity of the ellipse;

[0099] “-” means there is no such data.

[0100] From the detected C·V values ​​of the above Examples 1 to 19 and Comparative Examples 1 to 2 shown in Table 1, it can be clearly seen that the microchannel fluid processing device provided by the present application can fully mix different fluids (especially fluids with large viscosity differences, such as high-viscosity fluids and low-viscosity fluids), compared with microchannel fluid processing devices with other structures (such as the mixing chamber in Comparative Example 1 having a square structure) or a solution without a mixing chamber (Comparative Example 2), and can effectively compensate for the fluctuation of the fluid feed, so that the performance fluctuation of the fluid flowing out of the discharge channel is smaller.

Claims

1. A microchannel fluid processing device, wherein: include: Mixing chamber, feed channel, discharge channel and radiator, The mixing chamber has a length direction x, a width direction y, and a height direction z. The maximum cross-section of the plane formed by the mixing chamber in the length direction x and the width direction y is an ellipse. The eccentricity e of the ellipse is 0.30 to 0.95, The feed channel and the discharge channel are respectively arranged at two ends of the mixing chamber in the length direction. The radiation axis of the radiator is parallel to a plane formed by the length direction x and the width direction y, and points to the mixing chamber.

2. The microchannel fluid processing device according to claim 1, wherein: The length of the major semi-axis of the ellipse is 20 to 90 mm.

3. The microchannel fluid processing device according to claim 1, wherein: The ratio of the length of the major semi-axis of the ellipse to the diameter of the area equivalent circle of the radiation surface of the radiator is 5-20.

4. The microchannel fluid processing device according to claim 1, wherein: The radiation axis of the radiator is located in the plane where the ellipse is located and points to the center of the ellipse. The angle between the radiation axis and the major axis of the ellipse is 20° to 90°.

5. The microchannel fluid processing device according to claim 1, wherein: The radiator includes irradiating the mixing chamber with acoustic energy.

6. The microchannel fluid processing device according to claim 1, wherein: The mixing chamber has an upper main surface, a lower main surface, and a side wall. The upper main surface and the lower main surface are parallel to a plane formed by the length direction x and the width direction y. The upper main surface and the lower main surface define the height of the mixing chamber.

7. The microchannel fluid processing device according to claim 6, wherein: The radiator is located on the side wall and close to one side of the discharge channel.

8. A method for fluid mixing, comprising: Different fluids are mixed through the microchannel fluid processing device according to any one of claims 1 to 7.

9. The method of claim 8, wherein: The different fluids include low-viscosity fluids and high-viscosity fluids; Preferably, the viscosity of the high-viscosity fluid is greater than 100 cp, and the viscosity of the low-viscosity fluid is less than 100 cp.

10. The microchannel fluid processing device according to any one of claims 1 to 7 or a product prepared by the method according to claim 8 or 9.

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