Miniature mixer
By designing a micro mixer with upper and lower modules, vortices are generated using the first and second straight channels to enhance the mixing effect of the reagents. Furthermore, by simplifying the structure and reducing the pressure drop, the problems of complex structure and large pressure drop in existing micro mixers are solved, thus achieving a mixer with high efficiency and low cost.
Patent Information
- Application Number
- CN202520415948.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing micro mixers have complex structures, are difficult to manufacture, have mediocre mixing effects, and experience increased pressure drop.
Design a micro mixer with an upper and lower module structure, and set up a first straight channel, a second straight channel and an arc-shaped mixing channel. The reagent generates vortices in the mixing channel, and the mixing effect is enhanced by centrifugal force. At the same time, the structure is simplified to reduce pressure drop.
It achieves good mixing effect and low pressure drop, simplifies the structure, reduces production costs, and facilitates user assembly and use.
Smart Images
Figure CN223995931U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of micro-continuous chemical pharmaceuticals, and in particular to a micro mixer. Background Technology
[0002] With the development of fine chemical and pharmaceutical intermediate research and development, the demand for mixers is increasing. Currently, in emerging chemical and pharmaceutical research and development fields, small-sized and easy-to-use micro-mixers are becoming increasingly widely used. However, most micro-mixers on the market are T-type mixers, which introduce the reagent to be mixed through two cross channels at the end of the mixer. This type of T-type mixer has a simple structure but generally poor mixing effect. There is also a three-dimensional micro-mixer, which improves the mixing effect by setting multiple tortuous mixing channels. However, this type of three-dimensional micro-mixer has a complex structure and is difficult to manufacture. It not only has a high cost, but the complex internal structure also increases the pressure drop of the mixer. Utility Model Content
[0003] The purpose of this invention is to provide a micro mixer with a simple structure, which can achieve good mixing effect and has a small pressure drop.
[0004] To achieve this objective, the present invention adopts the following technical solution: a micro mixer, comprising an upper module and a lower module. The upper module has two inlet channels, which vertically penetrate the upper module. The bottom surface of the upper module has a first straight channel and a first bend. One end of the first straight channel is connected to one of the inlet channels, and the other end is connected to one end of the first bend. The lower module is detachably connected to the upper module. The lower module has an outlet channel, which vertically penetrates the lower module. The top surface of the lower module has a second straight channel and a second bend. One end of the second straight channel is connected to the other inlet channel, and the other end is connected to one end of the second bend. The second bend and the first bend are joined together to form an arc-shaped mixing channel. The first straight channel and the second straight channel are connected at one end of the mixing channel, and the outlet channel is connected to the other end of the mixing channel.
[0005] Preferably, a first cross passage is provided between the first straight section and the first curve, and a second cross passage is provided between the second straight section and the second curve, with the first cross passage and the second cross passage being joined together to form a transition channel.
[0006] Preferably, the entrance passage and the corresponding first straight road, the first straight road and the first cross road, and the first cross road and the first curve are all connected by rounded corners.
[0007] Preferably, the length of the first straight section is equal to the length of the second straight section.
[0008] Preferably, the first straight section and the second straight section are parallel.
[0009] Preferably, the cross-section of the mixing channel is circular.
[0010] Preferably, the cross-sectional area of the transition channel is smaller than the cross-sectional area of the mixing channel.
[0011] Preferably, the central angle of the arc-shaped mixing channel is 180°.
[0012] Preferably, the micro mixer further includes a sealing assembly that abuts between the upper module and the lower module.
[0013] Preferably, the sealing assembly includes a first sealing ring arranged along the edge of the upper module and surrounding the inlet channel, the first straight channel, the second straight channel and the mixing channel.
[0014] The beneficial effects of this invention are as follows: By setting up a first straight channel, a second straight channel, and a mixing channel, the two agents flowing through the two inlet channels first flow in the first and second straight channels respectively. Then, they collide at the end of the mixing channel away from the outlet channel, generating eddies, thus rapidly mixing to obtain a mixed agent. After the mixed agent enters the arc-shaped mixing channel, the collision frequency between the two agent particles increases under the action of centrifugal force, thereby improving mixing efficiency and enhancing the mixing effect. Simultaneously, the first straight channel, the second straight channel, and the mixing channel have a simple structure and a short path, which not only simplifies the structure of the micro-mixer and facilitates user assembly and use, but also optimizes the flow channel layout and effectively reduces pressure drop. Attached Figure Description
[0015] Figure 1 This is a perspective view of a micro mixer according to an embodiment of the present invention;
[0016] Figure 2 yes Figure 1 Sectional view from point A;
[0017] Figure 3 This is a bottom view of the upper module of an embodiment of this utility model;
[0018] Figure 4 This is a top view of the lower module of this utility model embodiment.
[0019] In the diagram: 100, upper module; 110, inlet channel; 120, first straight section; 130, first bend; 140, first cross section; 200, lower module; 210, outlet channel; 220, second straight section; 230, second bend; 240, second cross section; 300, mixing channel; 310, transition channel; 400, sealing assembly; 410, first sealing ring. Detailed Implementation
[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0024] Reference Figures 1 to 4As shown, a micro mixer according to an embodiment of this application includes an upper module 100 and a lower module 200. The upper module 100 is a rectangular block, and the upper module 100 and the lower module 200 are identical in shape and size. The upper module 100 has two inlet channels 110, which are arranged at intervals along the length of the upper module 100 and vertically penetrate the upper module 100. The bottom surface of the upper module 100 has a first straight channel 120 and a first bend 130. The first straight channel 120 is arranged along the length of the upper module 100, with one end connected to one of the inlet channels 110 and the other end connected to one end of the first bend 130. The other end of the first bend 130 is located on the side of the first straight channel 120 away from the inlet channel 110.
[0025] The lower module 200 is detachably connected to the upper module 100. The lower module 200 is provided with an outlet channel 210, which runs vertically through the lower module 200. The top surface of the lower module 200 (i.e., the side wall of the lower module 200 facing the upper module 100) is provided with a second straight channel 220 and a second curved channel 230. The second straight channel 220 is arranged along the length of the second module. One end of the second straight channel 220 is connected to another inlet channel 110, and the other end is connected to one end of the second curved channel 230. The second curved channel 230 and the first curved channel 130 are joined together to form an arc-shaped mixed channel 300. The first straight channel 120 and the second straight channel 220 are connected at one end of the mixed channel 300, and the outlet channel 210 is connected to the other end of the mixed channel 300.
[0026] Understandably, by setting up the first straight channel 120, the second straight channel 220, and the mixing channel 300, the two agents flowing through the two inlet channels 110 will first flow in the first straight channel 120 and the second straight channel 220 respectively. Since the first straight channel 120 and the second straight channel 220 are not on the same horizontal plane, the agents in the first straight channel 120 and the second straight channel 220 will collide and generate eddies at the end of the mixing channel 300 away from the outlet channel 210, thereby quickly mixing to obtain a mixed agent. After the mixed agent enters the arc-shaped mixing channel 300, it not only increases the base time of the two agents, but also increases the collision frequency between the two agent particles under the action of centrifugal force, thereby improving the mixing efficiency and enhancing the mixing effect. At the same time, the upper module 100 and the lower module 200 are set with the same specifications. The first straight channel 120, the second straight channel 220, and the mixing channel 300 have a simple structure and a short path, which not only simplifies the structure of the micro mixer, reduces production costs, and facilitates user assembly and use, but also optimizes the flow channel layout and effectively reduces pressure drop.
[0027] Optionally, the upper module 100 and the lower module 200 can be connected by a locking structure or a snap-fit structure, or corresponding countersunk holes can be provided on the upper module 100 and the lower module 200, and fasteners passing through the countersunk holes can be connected. Further details will not be elaborated here.
[0028] Furthermore, a first cross passage 140 is provided between the first straight passage 120 and the first curve 130, and the first cross passage 140 is perpendicular to the first straight passage 120. A second cross passage 240 is provided between the second straight passage 220 and the second curve 230, and the second cross passage 240 is perpendicular to the second straight passage 220. The first cross passage 140 and the second cross passage 240 are respectively joined together to form a transition channel 310. One end of the transition channel 310 is connected to the first straight passage 120 and the second straight passage 220, and the other end is connected to the end of the mixing channel 300 away from the exit channel 210.
[0029] By setting a first horizontal channel 140 and a second horizontal channel 240, the first horizontal channel 140 and the second horizontal channel 240 cooperate to form a transition channel 310. When the two agents form a vortex at one end of the transition channel 310 to accelerate mixing, the first horizontal channel 140 can temporarily store and guide the mixed agent into the mixing channel 300, avoiding the vortex at the connection between the first straight channel 120 and the second straight channel 220 from directly entering the mixing channel 300 and hindering the subsequent flow of agents, thus affecting the mixing efficiency of the micro mixer.
[0030] Reference Figure 1 , Figure 3 and Figure 4 As shown, it can be understood that the central angle of the arc-shaped mixing channel 300 is 180°.
[0031] Setting the central angle of the mixing channel 300 to 180°, i.e., making the mixing channel 300 semi-circular, can, on the one hand, increase the flow path length of the fluid, further extend the mixing time, and ensure that the agent generates a secondary flow (Dean flow) under the action of centrifugal force, so that the mixed agent forms a vortex in the mixing channel 300, promoting the mixing of the agent in the lateral and longitudinal directions, and further improving the mixing effect; on the other hand, the local resistance coefficient (K) of the 180° curved mixing channel 300 is about 0.3 to 0.5. Using a single 180° bend instead of multiple small-angle bends can further reduce the pressure drop and control the pressure drop within a reasonable range.
[0032] Furthermore, the entrance passage 110 and the corresponding first straight passage 120, the first straight passage 120 and the first cross passage 140, and the first cross passage 140 and the first curve 130 are all connected by rounded corners; the entrance passage 110 and the corresponding second straight passage 220, the second straight passage 220 and the second cross passage 240, and the second cross passage 240 and the second curve 230 are also connected by rounded corners.
[0033] By setting rounded corners at the connection points of different channels, the flow resistance encountered by the agent when flowing between different channels can be reduced, further reducing the pressure drop.
[0034] Reference Figure 1 and Figure 2 As shown, it can be understood that the length of the first straight section 120 is equal to the length of the second straight section 220.
[0035] The lengths of the first straight channel 120 and the second straight channel 220 are set to be equal to ensure that the two agents flowing into the first straight channel 120 and the second straight channel 220 from the two inlet channels 110 follow the same path before they meet and collide. This prevents a single agent from entering the mixing channel 300 first and flowing into the outlet channel 210, which would affect the purity of the mixed agent product.
[0036] Furthermore, the first straight track 120 and the second straight track 220 are parallel, that is, the projection of the first straight track 120 and the second straight track 220 onto the horizontal plane is a continuous straight line.
[0037] By arranging the first straight channel 120 and the second straight channel 220 in parallel, the width dimensions of the upper module 100 and the lower module 200 can be reduced, further reducing the volume of the micro mixer.
[0038] Reference Figure 2 As shown, it can be understood that the first bend 130 is a semi-circular channel on the bottom surface of the upper module 100, and the second bend 230 is a semi-circular channel on the top surface of the lower module 200. The cross-sectional radius of the first bend 130 and the cross-sectional radius of the second bend 230 are equal, so that the cross-section of the hybrid channel 300 formed by the first bend 130 and the second bend 230 is circular.
[0039] Setting the cross-section of the mixing channel 300 to be circular can reduce the flow resistance of the mixing channel 300, reduce the frictional resistance and local resistance during the flow of the agent, and further reduce the pressure drop.
[0040] Furthermore, the cross-sectional area of the transition channel 310 is smaller than the cross-sectional area of the mixing channel 300.
[0041] By setting the cross-sectional area of the transition channel 310 to be smaller than that of the mixing channel 300, when the high-speed agent enters the large-section mixing channel 300 from the transition channel 310, the kinetic energy of the agent is converted into turbulent kinetic energy, which further enhances the micro-mixing performance of the agent.
[0042] Optionally, the cross-section of the mixing channel 300 and the cross-section of the outlet channel 210 have the same shape and size, which facilitates the user's design and processing of the first bend 130, the second bend 230 and the mixing channel 300.
[0043] Reference Figure 1As shown, it can be understood that the micro mixer also includes a sealing assembly 400, which abuts between the upper module 100 and the lower module 200.
[0044] Specifically, the sealing assembly 400 includes a first sealing ring 410, which is a rounded rectangle that matches the upper module 100. The first sealing ring 410 is arranged along the edge of the upper module 100 and surrounds the inlet channel 110, the first straight channel 120, the second straight channel 220, and the mixing channel 300. The upper module 100 and the lower module 200 each have annular positioning grooves on opposite sides that match the first sealing ring 410. After the upper module 100 and the lower module 200 are connected, the first sealing ring 410 abuts against the positioning groove.
[0045] By setting the first sealing ring 410, the sealing performance of the micro mixer can be effectively improved, preventing the agent from flowing out from the joint between the upper module 100 and the lower module 200, which could cause pollution or material loss.
[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A micro-mixer, characterized by, The micro-mixer comprises: an upper module (100) provided with two inlet channels (110) vertically penetrating the upper module (100), the bottom surface of the upper module (100) being provided with a first straight channel (120) and a first curved channel (130), one end of the first straight channel (120) being in communication with one of the inlet channels (110) and the other end being in communication with one end of the first curved channel (130); a lower module (200) detachably connected with the upper module (100), the lower module (200) being provided with an outlet channel (210) vertically penetrating the lower module (200), the top surface of the lower module (200) being provided with a second straight channel (220) and a second curved channel (230), one end of the second straight channel (220) being in communication with the other of the inlet channels (110) and the other end being in communication with one end of the second curved channel (230), the second curved channel (230) and the first curved channel (130) corresponding to each other to form a circular-arc-shaped mixing channel (300), the first straight channel (120) and the second straight channel (220) being in communication at one end of the mixing channel (300), and the outlet channel (210) being in communication with the other end of the mixing channel (300).
2. The micro mixer of claim 1, wherein A first horizontal channel (140) is arranged between the first straight channel (120) and the first curved channel (130), and a second horizontal channel (240) is arranged between the second straight channel (220) and the second curved channel (230), the first horizontal channel (140) and the second horizontal channel (240) corresponding to each other to form a transition channel (310).
3. The micro mixer of claim 2, wherein, The inlet channel (110), the corresponding first straight channel (120), the first straight channel (120) and the first horizontal channel (140), and the first horizontal channel (140) and the first curved channel (130) are all connected through a round corner.
4. The micro mixer of claim 2, wherein The length of the first straight channel (120) is equal to the length of the second straight channel (220).
5. The micro mixer of claim 4, wherein The first straight channel (120) and the second straight channel (220) are parallel.
6. The micro mixer of claim 2, wherein The cross section of the mixing channel (300) is circular.
7. The micro mixer of claim 2, wherein The cross-sectional area of the transition channel (310) is smaller than the cross-sectional area of the mixing channel (300).
8. The micro mixer of claim 2, wherein, The central angle of the circular-arc-shaped mixing channel (300) is 180°.
9. The micromixer according to any one of claims 1 to 8, wherein The micro-mixer further comprises a sealing assembly (400) abutting between the upper module (100) and the lower module (200).
10. The micro mixer of claim 9, wherein The sealing assembly (400) comprises a first sealing ring (410) arranged along the edge of the upper module (100) and surrounding the inlet channel (110), the first straight channel (120), the second straight channel (220) and the mixing channel (300).