Vacuum emulsification equipment for skin care product preparation and emulsification method

Abstract

The invention relates to the technical field of skin care product production, in particular to vacuum emulsification equipment for skin care product preparation and an emulsification method.The vacuum emulsification equipment comprises a vacuum tank, a built-in barrel is arranged in the vacuum tank, and an annular cavity is formed by the vacuum tank and the built-in barrel; the backflow pieces are circumferentially arranged on the vacuum tank at equal intervals, and the backflow pieces can guide the backflow skin care product to enter the annular cavity; the ultrasonic emulsification devices are connected with the backflow part and are arranged in the axis direction of the vacuum tank, the end of each ultrasonic emulsification device is a cylinder, and an annular gap is formed between each cylinder and the backflow part so as to improve the emulsification effect.

Description

Technical Field

[0001] This invention relates to the field of skincare product manufacturing technology, specifically a vacuum emulsification device and emulsification method for skincare product preparation. Background Technology

[0002] Vacuum emulsification technology, when applied to skincare product manufacturing, can significantly improve product quality and stability. By emulsifying under negative pressure, this technology effectively reduces bubble formation, ensuring the uniformity and fineness of emulsion particles, thereby improving the texture uniformity and permeability of skincare products. Simultaneously, the aseptic operation under vacuum reduces the risk of microbial contamination, extending the product's shelf life.

[0003] During vacuum emulsification, stirring is often carried out. By changing the flow path of the skin care product, the opposing impact between the skin care product and the stirring device can be generated, thereby improving the emulsification effect. However, when the skin care product interacts with the stirring device, the stirring device will change the movement direction of the skin care product. At this time, the skin care product that enters the vacuum tank later will slow down before interacting with the stirring device, thus reducing the interaction between the two and affecting the emulsification effect. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum emulsification device and emulsification method for preparing skin care products, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a vacuum emulsification device for preparing skincare products, comprising: a vacuum tank, wherein an inner barrel is disposed inside the vacuum tank, the two forming an annular cavity; a reflux member, equidistantly disposed on the vacuum tank in a circular pattern, the reflux member being able to guide the refluxed skincare product into the annular cavity; a reflux hole, disposed on the inner barrel, the reflux hole being used to connect the inside and outside of the inner barrel, allowing the skincare product to enter the inner barrel through the reflux hole when circulating into the annular cavity; and an ultrasonic emulsification device connected to the reflux member, the ultrasonic emulsification device being able to generate ultrasound and act on the skincare product.

[0006] As a further aspect of the present invention: multiple sets of ultrasonic emulsification devices are arranged along the axial direction of the vacuum tank, and the end of the ultrasonic emulsification device is a cylinder, which forms an annular gap with the reflux component.

[0007] As a further aspect of the present invention: a driving device is provided on the top of the vacuum tank, the output shaft of the driving device is connected to a central tube rotatably mounted on the vacuum tank and extending into its interior, the central tube is coaxially and fixedly connected to the inner barrel, and multiple sets of first through slots are opened on the central tube, so that the skin care products in the inner barrel can enter the central tube through the first through slots.

[0008] As a further embodiment of the present invention: the upper part of the central tube is provided with a plurality of second through grooves in a circular shape, and a sleeve is slidably installed on the central tube in a sealed manner. An annular cavity is formed between the sleeve and the central tube, and the sleeve is connected to a circulation component disposed outside the vacuum tank; the skin care product that enters the interior can enter the annular cavity through the second through grooves.

[0009] As a further embodiment of the present invention: the circulation assembly includes a circulation pump body structure fixedly installed on the vacuum tank, the inlet of the circulation pump body structure is connected to the sleeve pipe, and the outlet of the circulation pump body structure is connected to the return component.

[0010] As a further embodiment of the present invention: the reflux component includes multiple diversion channels equidistantly arranged along the axis of the vacuum tank, the central axis of the diversion channels being tangent to the concentric circles of the vacuum tank, and intermediate connecting pipes connected to the multiple diversion channels, the intermediate connecting pipes being connected to the liquid outlet of the circulating pump body structure; the diversion channels and the ultrasonic emulsification device form the annular gap.

[0011] As a further aspect of the present invention: multiple sets of shearing rods are provided on the circumferential sidewall of the inner barrel, and the shearing rods are capable of shearing the skin care products that enter the annular cavity; multiple sets of stirring rods are also installed circumferentially and equidistantly inside the inner barrel, arranged along its axial direction.

[0012] As a further embodiment of the present invention: the reflux hole is located at one end outside the inner barrel, which is in front of the inner barrel in the direction of movement compared to the other end.

[0013] A method for emulsifying skincare products using the aforementioned vacuum emulsification equipment includes the following steps: Step 1: Pour the skincare product to be emulsified into a vacuum container; Step 2: Start the drive unit and circulation pump structure. When the drive unit is working, it can drive the central tube and the inner barrel to make circular motion. During this process, the stirring rod and shearing rod can stir and shear the skin care products inside and outside the inner barrel. Step 3: When the circulating pump body structure is in operation, it can circulate the skin care products and generate a liquid flow that is opposite to the rotation direction of the skin care products inside the inner barrel when they enter the annular cavity. Step 4: Repeat steps 2 and 3 above for the predetermined time to complete emulsification, then remove the skincare product.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: By setting an annular gap, the skincare product, when circulating to the end of the diversion channel, can be ultrasonically emulsified, thus improving the uniformity and fineness of the emulsion particles. Furthermore, based on the Venturi effect, the skincare product can achieve greater speed, preventing changes in its direction of movement and allowing it to obtain greater shear force when interacting with the shearing rod. Moreover, the combination of ultrasound and the Venturi effect further improves the emulsification rate of the skincare product; the vibration caused by ultrasound further accelerates the instantaneous flow rate of the skincare product, further increasing the shear force. Through the spatial separation of the internal barrel, the optimized design of the annular cavity, and the setting of the shearing rod, the skincare product enters the annular cavity and... The opposing motion generated during container placement further intensifies the shearing effect of the shearing rod on the fluid, enhancing the shear strength of the fluid and optimizing the uniformity of shear force distribution. This results in more uniform refinement of the emulsion particles at the microscopic level. Furthermore, the increased contact between the skincare product and the shearing rod as it enters the annular cavity further improves the emulsification effect. The reflux holes not only enhance the turbulence of the fluid but also significantly improve emulsification efficiency through fluid dynamics optimization. The counter-flowing skincare product forms localized eddies and concentrated shear force areas during impact, causing more frequent collisions and shearing between the oil and water phases at the microscopic level. This dynamic shearing effect effectively refines the emulsion particles, significantly improving the permeability and stability of the skincare product. Attached Figure Description

[0015] Figure 1 A schematic diagram of one embodiment of a vacuum emulsification apparatus for preparing skincare products; Figure 2 A schematic diagram of a partial cross-section of a vacuum emulsification device for preparing skincare products, as shown in one embodiment. Figure 3 A front view of an embodiment of a vacuum emulsification apparatus for preparing skincare products; Figure 4 for Figure 3 Structural cross-section at point AA; Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 A top view of a vacuum tank in one embodiment of a vacuum emulsification apparatus for preparing a skin care product; Figure 7 A schematic diagram of the structure of the built-in barrel in one embodiment of a vacuum emulsification device for preparing skin care products; Figure 8 An exploded view of the structure of the central tube and the sleeve tube in one embodiment of a vacuum emulsification device for preparing skin care products; Figure 9A front view of the built-in barrel in one embodiment of a vacuum emulsification apparatus for preparing skincare products; Figure 10 for Figure 9 Cross-sectional view of the structure at point BB; Figure 11 for Figure 10 Enlarged view of the structure at point B in the middle.

[0016] In the diagram: 1. Vacuum tank; 2. Internal tank; 3. Drive unit; 4. Central tube; 401. First through groove; 402. Second through groove; 5. Annular sealing plate; 6. Sleeve; 7. Circulating pump body structure; 8. Intermediate connecting pipe; 9. Diversion channel; 10. Ultrasonic emulsification device; 11. Annular gap; 12. Shearing rod; 13. Return hole; 14. Stirring rod. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0019] Please see Figures 1-11 In this embodiment of the invention, a vacuum emulsification device for preparing skin care products includes: a vacuum tank 1, a reflux component, and an ultrasonic emulsification device 10.

[0020] The vacuum tank 1 is equipped with a driving device 3 at its top. The output shaft of the driving device 3 is connected to a central tube 4 that is rotatably mounted on the vacuum tank 1 and extends into it. The central tube 4 is coaxially and fixedly connected to the inner tank 2. The central tube 4 has multiple sets of first through slots 401. The skin care products in the inner tank 2 can enter the central tube 4 through the first through slots 401. The inner tank 2 is also equipped with multiple sets of stirring rods 14 that are circumferentially and equidistantly arranged along its axial direction.

[0021] In this embodiment, when the skincare product is placed inside the inner tank 2, the central tube 4 and the output shaft of the drive device 3 are linked by the start of the control drive device 3, thereby driving the inner tank 2 to perform circular motion. Since the central tube 4 and the inner tank 2 are coaxially fixedly connected, the inner tank 2 can maintain a high degree of balance during rotation, effectively avoiding vibration caused by eccentric rotation. This design not only significantly improves the stability of equipment operation, but also effectively reduces the mechanical damage to the seal of the vacuum tank 1 caused by long-term vibration, thereby extending the service life of the seal and ensuring the stability of the material conveying process. At the same time, it maintains the stability of the negative pressure environment inside the vacuum tank 1, providing better process conditions for the emulsification process of the skincare product.

[0022] Furthermore, during the rotation of the built-in tank 2, the stirring rod 14 inside it simultaneously performs circular motion. This ensures that the various components of the skincare product are more evenly distributed during mixing, significantly improving mixing efficiency and uniformity. Uniform mixing not only helps improve the emulsification effect of the skincare product but also ensures that the product maintains stable texture and performance during storage and use. In addition, the dynamic stirring action of the stirring rod 14 can effectively prevent the raw materials from separating or settling, further optimizing the production quality of the product and providing a reliable guarantee for the performance and user experience of the final product. Through the above design, this device not only improves production efficiency but also lays a solid technical foundation for the high-quality production of skincare products.

[0023] It should be noted that by agitating the skin care products with the stirring rod 14, the skin care products placed in the inner tank 2 can also generate a directional flow direction. This direction of movement is opposite to the flow direction of the skin care products circulating into the inner tank 2, thereby enabling the skin care products to generate a certain convective impact effect and further improve the emulsification effect of the skin care products.

[0024] Please see Figures 1-5 The interior of the central tube 4 is hollow, and the upper part of the central tube 4 is also provided with multiple sets of second through grooves 402 in a circular shape. A sleeve tube 6 is slidably installed on the central tube 4, and an annular chamber is formed between the sleeve tube 6 and the central tube 4. The sleeve tube 6 is connected to a circulation assembly located outside the vacuum tank 1. Skin care products entering the interior can enter the annular chamber through the second through grooves 402. Specifically, the circulation assembly includes a circulation pump structure 7 fixedly installed on the vacuum tank 1. The inlet of the circulation pump structure 7 is connected to the sleeve tube 6, and the outlet of the circulation pump structure 7 is connected to the return component.

[0025] In this embodiment, the circulating pump body structure 7 generates a suction force field, which is transmitted to the central tube 4 through the annular chamber to form a continuous fluid circulation path. When the skin care product in the inner barrel 2 is sucked in, its movement trajectory presents a spiral centripetal flow. That is, when the skin care product enters the interior of the central tube 4 along the first through groove 401, it generates a radial displacement trend from the outer periphery to the central axis, which significantly enhances the uniformity of fluid shear force distribution.

[0026] Furthermore, when the stirring rod 14 operates at a constant speed, a dynamic shear difference is formed with the asynchronous movement of the material. As the skincare product converges radially towards the center, the material flow makes tangential contact with the surface of the stirring rod 14. The laminar shear force generated by the speed difference promotes the three-dimensional reconstruction of the material micro-clusters. This dynamic process of "shear-convergence-redispersion" enables the oil phase and water phase to form a more stable emulsion network at the microscopic level. Specifically, when the linear velocity of the stirring rod 14 and the material flow rate meet a specific ratio, the average particle size of the emulsion particles can be reduced to the range of 10-20 μm, significantly improving the permeability and stability of the skincare product.

[0027] Through this collaborative design, the combination of the circulating pump structure 7 and the agitation system not only improves emulsification efficiency but also significantly optimizes the final performance of the product. The fluid undergoes multiple shear dispersions during circulation, resulting in an active ingredient distribution uniformity of over 98%, thus ensuring the product maintains stable texture and efficacy during storage and use. Simultaneously, continuous circulation and agitation increase the absolute value of the zeta potential of the emulsion system, extending the product's shelf life. Furthermore, for anti-wrinkle formulations of different viscosities, this system can adaptively match process parameters by adjusting the circulation flow rate, ensuring effective prevention of mechanical damage to active ingredients (such as retinol microcapsules and peptide complexes) when processing them, thereby maximizing product efficacy.

[0028] This multi-dimensional synergistic mixing system not only improves energy utilization but also achieves a qualitative leap from "simple mixing" to "precise emulsification" by optimizing fluid circulation paths and shear force distribution. It provides a solution for the industrial production of skincare products that combines high efficiency and stability, while significantly enhancing the market competitiveness and user experience of the products while ensuring production efficiency.

[0029] Please see Figure 2 , Figure 6 , Figure 7 , Figures 9-11The vacuum tank 1 is equipped with an inner barrel 2, which together form an annular cavity. Specifically, the vacuum tank 1 is equipped with two sets of parallel annular sealing plates 5, which are respectively slidably connected to both ends of the inner barrel 2, thereby making the annular cavity more airtight. When the skin care product enters the annular cavity, it will not enter the upper or lower part of the inner barrel 2 and the vacuum tank 1, thus preventing that part of the skin care product from participating in the circulation. The inner barrel 2 is equipped with multiple sets of shearing rods 12 on its circumferential sidewall, which can shear the skin care product entering the annular cavity.

[0030] In this embodiment, the presence of the built-in barrel 2 functionally divides the internal space of the vacuum tank 1 into two independent areas: the columnar space inside the built-in barrel 2 and the annular cavity formed between the built-in barrel 2 and the vacuum tank 1. This spatial layout not only optimizes the fluid dynamics path but also provides a more efficient shear environment for the circulation and emulsification process of skin care products.

[0031] During the circulation process of the skin care product, the material is first guided into the annular cavity and circulates in this area. Since the cross-sectional area of ​​the annular cavity is smaller than that of the columnar space, the flow rate of the fluid in this area is significantly increased, thereby enhancing the concentration effect of shear force. When the skin care product circulates in the annular cavity, it collides with the shear rod 12 at high frequency. The dynamic shear force generated by this collision can reconstruct the material micro-clusters at the microscopic level, further refining the size of the emulsion particles.

[0032] Through this design, the circulation path of skincare products within the annular cavity is optimized into a high-shear-efficiency fluid shear path. The dynamic shearing action of the shear bar 12 not only significantly reduces the interfacial tension between the oil phase and the water phase but also promotes the uniform distribution of active ingredients. Specifically, the average particle size of the emulsion particles can be reduced to the range of 10-20 μm, significantly improving the permeability and stability of the skincare products. At the same time, this uniform shearing effect can effectively prevent the stratification of the emulsion system, ensuring that the product maintains stable texture and performance during storage and use.

[0033] Furthermore, the annular cavity design also brings significant energy optimization benefits. Because the fluid velocity distribution within the annular cavity is more uniform and the shear force distribution is more balanced, ineffective energy dissipation is reduced. This design not only improves emulsification efficiency but also reduces equipment energy consumption, providing a more cost-effective solution for industrial production.

[0034] In summary, through the optimized design of the spatial separation of the built-in barrel 2 and the annular cavity, skincare products can achieve a more uniform and finer shearing effect during circulation. This multi-dimensional synergistic emulsification system not only improves the emulsification uniformity and stability of the product, but also significantly extends the product's shelf life, providing a technical guarantee for the production of high-end skincare products that combines high efficiency and stability.

[0035] Please see Figure 5 The return components are arranged circumferentially and equidistantly on the vacuum tank 1. The return components can guide the returned skin care products into the annular cavity. The ultrasonic emulsification device 10 is connected to the return components and multiple sets are arranged along the axial direction of the vacuum tank 1. The end of the ultrasonic emulsification device 10 is a cylinder, and an annular gap 11 is formed between the cylinder and the return components.

[0036] In this embodiment, when the skincare product enters the reflux member, the annular gap 11 formed between the ultrasonic emulsification device 10 and the reflux member significantly optimizes the fluid motion characteristics. By designing the geometric parameters of the annular gap 11, the cross-sectional area of ​​the fluid channel gradually decreases, thereby generating a pressurization and acceleration mechanism similar to the Venturi effect during fluid flow. When the skincare product passes through this area, the flow velocity is significantly increased, forming a high-speed jet, which causes it to be ejected toward the annular cavity with higher kinetic energy. This design not only improves the ejection speed of the fluid, but also further increases the velocity difference between the skincare product and the shear bar 12 through fluid dynamics optimization. The dynamic change of this velocity difference makes the shear force more evenly distributed in the fluid, thereby significantly improving the shearing effect and ensuring that the size of the emulsified particles is more uniform and fine.

[0037] Furthermore, the end of the ultrasonic emulsification device 10 generates an ultrasonic effect through high-frequency vibration. When the skin care product enters the annular gap 11, the distance between it and the end of the ultrasonic emulsification device 10 is designed to be extremely small, thereby ensuring that the fluid can fully contact the ultrasonic action when passing through this area. The high-frequency vibration of the ultrasonic wave generates a cavitation effect in the fluid, causing a large number of tiny bubbles to form inside the fluid and break down rapidly, releasing powerful shock waves and a local high temperature and high pressure environment. This physical action can further refine the emulsified particles, break the interfacial tension between the oil phase and the water phase, and enable the active ingredients to achieve more uniform dispersion at the microscopic level.

[0038] Through this multi-dimensional synergistic design, the skincare product undergoes not only the enhanced mechanical shearing force within the annular gap 11 but also the physical emulsification effect of ultrasound. This dual mechanism significantly improves emulsification efficiency and enhances the stability of the emulsion system. Specifically, ultrasound can effectively prevent the aggregation of emulsion particles, ensuring the uniform distribution of active ingredients in the fluid, thereby improving the product's permeability and efficacy. In addition, the high-frequency vibration of the ultrasonic emulsification device 10 can reduce the mechanical shearing force required during the emulsification process, reduce equipment energy consumption, and extend the equipment's service life.

[0039] In summary, through the optimized hydrodynamic design of the annular gap 11 and the synergistic effect of the ultrasonic emulsification device 10, skincare products can achieve more efficient shearing and emulsification during circulation. This design not only improves the uniformity and fineness of the emulsion particles, but also significantly enhances the stability of the emulsion system, providing an efficient, stable, and energy-saving solution for the industrial production of skincare products.

[0040] Please see Figures 4-6 The reflux component includes multiple diversion channels 9 equidistantly arranged along the axis of the vacuum tank 1. The central axis of each diversion channel 9 is tangent to the concentric circle of the vacuum tank 1, and an intermediate connecting pipe 8 is connected to each of the multiple diversion channels 9. The intermediate connecting pipe 8 is connected to the liquid outlet of the circulating pump body structure 7. The diversion channel 9 and the ultrasonic emulsification device 10 form the annular gap 11.

[0041] In this embodiment, when the skin care product enters the annular cavity through the diversion channel 9, the geometric design of the diversion channel 9 significantly optimizes the motion characteristics of the fluid through the tangential flow mechanism. Since the central axis of the diversion channel 9 is tangential to the concentric circle of the vacuum tank 1, the skin care product will naturally form a tangential flow tendency when entering the annular cavity. This tangential flow direction is opposite to the rotation direction of the inner barrel 2, thereby generating a significant relative velocity difference at the moment the fluid enters the annular cavity.

[0042] This relative velocity difference not only enhances the shearing force between the skincare product and the shear rod 12, but also significantly improves the emulsification efficiency through fluid dynamics optimization. Specifically, the tangential flow causes the fluid to form local vortices in the annular cavity, while the reverse rotation of the shear rod 12 further intensifies the shearing effect of the fluid. This dual shearing mechanism not only enhances the shear strength of the fluid, but also optimizes the uniformity of the shear force distribution, enabling the emulsion particles to achieve more uniform refinement at the microscopic level.

[0043] Through this design, the flow path of skincare products within the annular cavity is optimized into a high-shear-efficiency fluid shear path; the average particle size of the emulsified particles can be reduced to the range of 10-20μm, significantly improving the permeability and stability of the skincare products; at the same time, the concentration effect of shear force increases emulsification efficiency by about 20%-30%, shortens emulsification time, and reduces energy consumption; in addition, the combination of tangential flow and shear force ensures the uniform distribution of active ingredients in the fluid, preventing excessively high or low local concentrations, thereby improving the product's effectiveness.

[0044] Please see Figure 11 The built-in barrel 2 is also provided with a return hole 13 that connects its inside and outside. The skin care products circulating in the annular cavity can enter the interior of the built-in barrel 2 through the return hole 13. Specifically, the return hole 13 is located at the front of the built-in barrel 2 in the direction of movement of the built-in barrel 2 at one end compared to the other end.

[0045] In this embodiment, the skin care product forms a unique counter-flow system within the annular cavity and the inner barrel 2. When the inner barrel 2 rotates, its outer return hole 13 is cleverly designed to face forward, that is, in the same direction as the rotation of the inner barrel 2. This design, combined with the negative pressure extraction mechanism, allows the skin care product in the annular cavity to be efficiently guided through the return hole 13 and re-enter the inner barrel 2. At this time, the newly entered skin care product strongly impacts the material in the inner barrel 2 that originally flowed in the opposite direction.

[0046] This impact effect not only enhances the turbulence of the fluid, but also significantly improves emulsification efficiency through fluid dynamics optimization. Specifically, the skincare product flowing in the opposite direction forms local eddies and shear force concentration areas during the impact process, causing the oil phase and water phase to collide and shear more frequently at the microscopic level. This dynamic shearing effect can effectively refine the emulsion particles and significantly improve the permeability and stability of the skincare product.

[0047] As an embodiment of the present invention, a method for emulsifying a skin care product using the aforementioned vacuum emulsification equipment for skin care product preparation is also provided, comprising the following steps: Step 1: Pour the skincare product to be emulsified into vacuum jar 1; Step 2: Start the drive device 3 and the circulation pump structure 7. When the drive device 3 is working, it can drive the central tube 4 and the inner barrel 2 to make circular motion. During this process, the stirring rod 14 and the shearing rod 12 can stir and shear the skin care products inside and outside the inner barrel 2. Step 3: When the circulating pump structure 7 is activated, it can circulate the skin care product and generate a liquid flow that is opposite to the rotation direction of the skin care product inside the built-in tank 2 when it enters the annular cavity. Step 4: Repeat steps 2 and 3 above for the predetermined time to complete emulsification, then remove the skincare product.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vacuum emulsification device for preparing skincare products, characterized in that, include: A vacuum container, wherein an internal barrel is provided inside the vacuum container, and the two form an annular cavity; A return component is equidistantly arranged on the vacuum canister, which guides the returned skincare product into the annular cavity; a return hole is provided on the inner barrel, which is used to connect the inside and outside of the inner barrel, so that the skincare product can enter the inner barrel through the return hole when it circulates into the annular cavity. An ultrasonic emulsification device, connected to the return element, is capable of generating ultrasound and acting on skincare products.

2. The vacuum emulsification equipment for preparing skincare products according to claim 1, characterized in that, Multiple sets of ultrasonic emulsification devices are arranged along the axial direction of the vacuum tank, and the end of the ultrasonic emulsification device is a cylinder, which forms an annular gap with the reflux component.

3. The vacuum emulsification equipment for preparing skincare products according to claim 2, characterized in that, The vacuum tank is equipped with a driving device at the top. The output shaft of the driving device is connected to a central tube that is rotatably mounted on the vacuum tank and extends into it. The central tube is coaxially and fixedly connected to the inner barrel. Multiple sets of first through slots are opened on the central tube, and the skin care products in the inner barrel can enter the central tube through the first through slots.

4. The vacuum emulsification equipment for preparing skincare products according to claim 3, characterized in that, The upper part of the central tube is also provided with multiple sets of second through grooves in a circular shape, and a sleeve is slidably installed on the central tube in a sealed manner. An annular cavity is formed between the sleeve and the central tube, and the sleeve is connected to a circulation component located outside the vacuum tank. Skin care products that enter the interior can enter the annular cavity through the second through grooves.

5. The vacuum emulsification equipment for preparing skincare products according to claim 4, characterized in that, The circulation assembly includes a circulation pump body structure fixedly installed on the vacuum tank. The inlet of the circulation pump body structure is connected to the sleeve pipe, and the outlet of the circulation pump body structure is connected to the reflux component.

6. The vacuum emulsification equipment for preparing skincare products according to claim 5, characterized in that, The reflux component includes multiple diversion channels equidistantly arranged along the axis of the vacuum tank. The central axis of each diversion channel is tangent to the concentric circle of the vacuum tank, and an intermediate connecting pipe is connected to each of the multiple diversion channels. The intermediate connecting pipe is connected to the liquid outlet of the circulating pump body structure. The diversion channels form the annular gap with the ultrasonic emulsification device.

7. The vacuum emulsification equipment for preparing skincare products according to claim 1, characterized in that, Multiple sets of shearing rods are provided on the circumferential sidewall of the inner barrel, which can cut the skin care products that enter the annular cavity; multiple sets of stirring rods are also installed circumferentially and at equal intervals along the axial direction inside the inner barrel.

8. The vacuum emulsification equipment for preparing skincare products according to claim 7, characterized in that, The reflux hole is located at one end outside the inner barrel, which is in front of the inner barrel in the direction of movement compared to the other end.

9. A method for emulsifying a skincare product using a vacuum emulsification apparatus for skincare product preparation as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Step 1: Pour the skincare product to be emulsified into a vacuum container; Step 2: Start the drive unit and circulation pump structure. When the drive unit is working, it can drive the central tube and the inner barrel to make circular motion. During this process, the stirring rod and shearing rod can stir and shear the skin care products inside and outside the inner barrel. Step 3: When the circulating pump body structure is in operation, it can circulate the skin care products and generate a liquid flow that is opposite to the rotation direction of the skin care products inside the inner barrel when they enter the annular cavity. Step 4: Repeat steps 2 and 3 above for the predetermined time to complete emulsification, then remove the skincare product.

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