Freeze-dried facial mask anti-deposition suction circulating device
By installing a suction component with negative pressure suction function at the extrusion and discharge station of the freeze-dried facial mask production line, the problem of liquid sedimentation is solved, the liquid is recycled, the filling volume of the freeze-dried facial mask is stabilized and the product quality is consistent, and the production cost is reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-04-03
AI Technical Summary
During the production of freeze-dried facial masks, the liquid material is prone to evaporation during the penetration and wetting process, which leads to increased viscosity, uneven flow and sedimentation, affecting the stability of the filling volume and the consistency of product quality, and increasing production costs.
A suction component with negative pressure suction function is installed at the extrusion discharge station. The liquid extruded from the extrusion discharge station is sucked back into the circulating storage tank through an array of suction rods. The liquid is recycled through a vacuum generator and a solenoid valve, which prevents the liquid from depositing on the surface of the anti-pouring device.
It effectively avoids liquid sedimentation, ensures the stability of freeze-dried mask dosage and product quality consistency, reduces liquid waste, lowers production costs, and improves the stability and efficiency of the soaking process.
Smart Images
Figure CN121781376A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of freeze-dried facial mask processing equipment, specifically relating to a freeze-dried facial mask anti-deposition suction and circulation device. Background Technology
[0002] When producing face masks on a freeze-dried mask production line, the process involves the following steps: immersion of nonwoven fabric in liquid on an immersion device (immersion station) → discharge of excess freeze-dried fabric (extrusion discharge station) → drying of the fabric (drying station) → cutting of the wide fabric (cutting station) → winding of the fabric (winding station). After winding, the fabric is re-sprayed with active ingredients at the cutting line and then cut into individual pieces to resemble the contours of a face. The fabrics are then stacked in groups of 20-40 pieces manually or using a stacking device before being placed in a freeze dryer for low-temperature freeze-drying to maintain the stability of the active ingredients and the three-dimensional structure of the fabric.
[0003] During the nonwoven fabric impregnation process (impregnation station) → residual material discharge process (extrusion discharge station), the impregnation solution is in a relatively open environment, making it prone to evaporation. This leads to localized increases in concentration and viscosity, resulting in uneven flow and sedimentation. Especially in long-term continuous production, excessively viscous impregnation solutions cannot quickly penetrate the freeze-dried fabric. At the anti-slip device, some components of the solution pass through, while others evaporate and crystallize, adhering to the surface of the device structure, forming solid particles or further increasing viscosity. This causes the freeze-dried mask quantity to gradually increase over time, affecting the stability of the quantity and causing significant variations in each mask. It also negatively impacts product quality consistency, leading to inconsistent quality between different batches or even within the same batch. Moreover, these dried residues are difficult to clean, increasing cleaning and time costs during production. Additionally, uneven flow and sedimentation of the liquid prevent its full utilization, leading to waste and increased liquid usage costs, thus raising overall production costs.
[0004] Currently, existing freeze-dried facial mask production equipment is significantly inadequate in addressing this problem, lacking effective anti-deposition and liquid recycling mechanisms, making it difficult to meet the demands of large-scale, high-quality production. Therefore, developing a device that can effectively solve the problem of liquid deposition during freeze-dried facial mask production is of significant practical importance. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a freeze-dried facial mask anti-deposition suction and circulation device. By setting a suction component with negative pressure suction function at the extrusion discharge station, the liquid material squeezed from the upper surface of the extrusion discharge station is sucked back into the circulation storage tank in real time. Then, the liquid material is transported to the immersion tank through the circulation storage tank. This effectively avoids the liquid material from depositing on the surface of the anti-deposition device, ensures the stability of the freeze-dried facial mask filling volume and the consistency of product quality, and at the same time reduces liquid material waste and lowers production costs.
[0006] The technical solution to achieve the above objective is: a freeze-dried facial mask anti-deposition suction and circulation device, installed at the extrusion discharge station of a freeze-dried facial mask production line, wherein the extrusion discharge station includes a frame and an anti-sucking device installed therein, and the suction and circulation device includes a suction component and a liquid return system, wherein: The suction assembly includes an array of suction rods, which are mounted on the frame via an adjustment mechanism and are located above the membrane fabric at the extrusion discharge station. The liquid return system includes a first liquid storage tank, a second liquid storage tank, a vacuum generator, a negative pressure pipeline, a compressed air pipeline, a suction pipeline, and a discharge pipeline. The two ends of the negative pressure pipeline are connected to the first and second liquid storage tanks, respectively. The negative pressure pipeline is equipped with a vacuum generator connection port, a solenoid valve 1, and a solenoid valve 2, with the solenoid valves 1 and 2 located on opposite sides of the vacuum generator connection port. The vacuum generator is connected to the vacuum generator connection port. The two ends of the compressed air pipeline are connected to the negative pressure pipeline. The compressed air pipeline is equipped with a clean compressed air port, a solenoid valve 3, and a solenoid valve 4, with the solenoid valves 3 and 4 located on opposite sides of the vacuum generator connection port. The clean compressed air inlet is connected to two sides for external compressed air. The two ends of the suction pipe are connected to the first and second storage tanks, respectively. The suction pipe is equipped with a suction port, a solenoid valve five, and a solenoid valve six, which are located on either side of the suction port. The suction port is connected to the array suction rod via a connecting pipe. The two ends of the discharge pipe are connected to the bottom of the first and second storage tanks, respectively. The discharge pipe is equipped with a discharge port, a solenoid valve seven, and a solenoid valve eight, which are located on either side of the discharge port. The discharge port is connected to the wetting liquid tank via a return pipe. Solenoid valve 1, solenoid valve 3, solenoid valve 5 and solenoid valve 7 are used to control the passage between the corresponding pipeline and storage tank 1; solenoid valve 2, solenoid valve 4, solenoid valve 6 and solenoid valve 8 are used to control the passage between the corresponding pipeline and storage tank 2. Liquid level sensors are respectively installed in the first and second liquid storage tanks; The vacuum generator, liquid level sensor, and solenoid valves one through eight are respectively connected to the controller.
[0007] The above-mentioned freeze-dried facial mask anti-deposition suction and circulation device includes an installation and adjustment mechanism comprising an installation rod and two connecting rods. The two ends of the installation rod are respectively mounted on both sides of the top of the frame via shaft mounting seats. One end of each of the two connecting rods is movably connected to the installation rod via a cross shaft clamp, and the other end of each of the two connecting rods is connected to the array suction rod via a shaft clamp.
[0008] The above-mentioned freeze-dried facial mask anti-deposition suction and circulation device includes an array of liquid suction rods comprising a hollow rod body and a plurality of liquid suction holes arranged in an array thereon.
[0009] The above-mentioned freeze-dried facial mask anti-deposition suction and circulation device includes a vacuum generator for generating negative pressure. The controller adjusts the opening and closing of solenoid valves 1, 2, 3, 4, 7, and 8 to achieve negative pressure in storage tank 1 or storage tank 2. When the storage tank 1 or storage tank 2 is under negative pressure, the controller adjusts the opening and closing of solenoid valves 5 and 6 to allow the liquid on the surface of the membrane to enter the corresponding storage tank through the array of suction rods, suction port, and suction pipe. During material discharge, the controller controls the opening and closing of solenoid valves three and four, allowing compressed air from the clean compressed air inlet to enter storage tank one or storage tank two. It also controls the opening and closing of solenoid valves seven and eight to discharge the material in the corresponding storage tank through the discharge port and return pipeline to the impregnation tank.
[0010] The above-mentioned freeze-dried facial mask anti-deposition suction and circulation device includes a controller that controls a vacuum generator to operate in a negative pressure pipeline to generate negative pressure; the controller controls solenoid valve one to open, solenoid valves two and three to close, and solenoid valve seven to close, so that the negative pressure is transmitted to the liquid storage tank one, forming a negative pressure environment in the liquid storage tank one; the controller controls solenoid valve six to close and solenoid valve five to open, so that the negative pressure in the liquid storage tank one is transmitted to the suction port through the suction pipeline, and under the action of negative pressure, the liquid is sucked in through the array suction rods and enters the liquid storage tank one for temporary storage through the suction port and solenoid valve five; The liquid level sensor in the first storage tank monitors the liquid level in the first storage tank in real time and feeds it back to the controller. When the liquid level in the first storage tank reaches the set value, the controller controls the solenoid valve 1 to close, the solenoid valve 2 to open, the solenoid valve 4 to close, and the solenoid valve 8 to close, so that negative pressure is transmitted to the second storage tank, and a negative pressure environment is formed in the second storage tank. The controller controls the solenoid valve 5 to close and the solenoid valve 6 to open. The negative pressure in the second storage tank is transmitted to the suction port through the suction pipe, so that the liquid continues to be sucked in and enters the second storage tank for temporary storage through the solenoid valve 6. At the same time, the controller controls the opening of solenoid valves three and seven, and the compressed air entering from the clean compressed air port enters the liquid storage tank one through solenoid valve three, and the liquid accumulated in the liquid storage tank one is pushed out through the discharge port and returned to the impregnation liquid tank for recycling through the return pipeline; The liquid level sensor in the second storage tank monitors the liquid level in the second storage tank in real time and feeds it back to the controller. When the liquid level in the second storage tank reaches the set value, the controller automatically switches the opening and closing of each solenoid valve, reconnects the first storage tank to negative pressure, and at the same time controls the opening of solenoid valves four and eight. Compressed air entering from the clean air port enters the second storage tank through solenoid valve four, and the liquid accumulated in the second storage tank is forced out through the discharge port and returned to the impregnation tank for recycling through the return pipeline. This alternation is repeated to achieve continuous liquid return and recycling.
[0011] In the above-mentioned freeze-dried facial mask anti-deposition suction and circulation device, liquid level observation tubes are respectively provided on the first liquid storage tank and the second liquid storage tank.
[0012] In the above-mentioned freeze-dried facial mask anti-deposition suction and circulation device, the first liquid storage tank and the second liquid storage tank are respectively mounted on the liquid storage tank support, and the bottom end of the liquid storage tank support is provided with casters.
[0013] The freeze-dried facial mask anti-deposition suction and circulation device of the present invention has the following beneficial effects: (1) By setting up a suction component with negative pressure suction function at the extrusion discharge station, the liquid material squeezed from the upper surface of the extrusion discharge station is sucked back into the circulating storage tank in real time, and then the liquid material is transported to the immersion tank through the circulating storage tank. This effectively avoids the liquid material from depositing on the surface of the anti-pouring device, ensures the stability of the filling amount of the freeze-dried mask and the consistency of product quality, and at the same time reduces liquid material waste and lowers production costs. (2) The liquid is always in a relatively closed environment during the transmission process, which effectively avoids external pollution and volatilization loss and ensures the stability of the liquid composition; (3) By alternating the use of two storage tanks, continuous operation of material intake and discharge is achieved, avoiding the problem of liquid supply fluctuation caused by traditional single-tank intermittent operation, and significantly improving the stability and efficiency of the soaking process; (4) The vacuum generator generates negative pressure, eliminating the need for an additional vacuum pump. It has a compact structure and is energy-saving and energy-efficient. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the freeze-dried facial mask anti-deposition suction and circulation device of the present invention; Figure 2 This is a schematic diagram of the material suction assembly. Figure 3 This is a schematic diagram of the array of suction rods; Figure 4 This is a three-dimensional structural diagram of the liquid return system (viewed from the right). Figure 5 This is a three-dimensional structural diagram of the liquid return system (left view). Figure 6 This is a right view of the liquid return system; Figure 7 Left view of the return system; Figure 8 This is an electrical schematic diagram of the freeze-dried facial mask anti-deposition suction and circulation device of the present invention. Detailed Implementation
[0015] To enable those skilled in the art to better understand the technical solution of the present invention, its specific embodiments will be described in detail below with reference to the accompanying drawings.
[0016] Please see Figures 1 to 8 The extrusion discharge station of the freeze-dried facial mask production line includes a frame 30 and an anti-slip device 7 installed therein. A pair of conveyor rollers 5 and 6 are installed on the front side of the frame 30, and a pair of extrusion discharge rollers 3 and 4 are installed on the rear side of the frame. The anti-slip device is installed between the conveyor rollers and the extrusion discharge rollers. An impregnation tank 9 is installed in front of the frame 7, and a return tank 29 is installed below the extrusion discharge rollers. The return tank 29 is connected to the impregnation tank 9 through a return pipeline.
[0017] The freeze-dried facial mask anti-deposition suction and circulation device of the present invention is installed at the extrusion and discharge station, and includes a suction component and a liquid return system. See also... Figure 2 The suction assembly includes an array of suction rods 8, which are mounted on the frame 30 via an adjustment mechanism and positioned above the extrusion and discharge station of the membrane fabric. The adjustment mechanism includes a mounting rod 10 and two connecting rods 13. The two ends of the mounting rod 10 are respectively mounted on the left and right sides of the top of the frame 30 via shaft mounting seats 12. One end of each of the two connecting rods 13 is movably connected to the mounting rod 10 via a cross shaft clamp 11, and the other ends of each connecting rod 13 are connected to the array of suction rods 8 via shaft clamps 14. The adjustment mechanism allows for flexible adjustment of the array of suction rods 8 in three-dimensional space to adapt to the production needs of membrane fabrics of different specifications.
[0018] Please see again Figure 3 The array suction rod 8 includes a hollow rod body 81 and multiple suction holes 82 arranged in an array on it. The rod body 81 of the array suction rod 8 can be a telescopic rod, which can be extended or retracted according to the width of the membrane cloth. The return liquid system is connected to the array suction rod 8 and is used to provide negative pressure and collect excess liquid on the upper surface of the membrane cloth and return it to the wetting liquid tank 9.
[0019] After the nonwoven freeze-dried membrane fabric 60 is impregnated in the impregnation tank 8, it passes between the conveyor rollers 5 and 6 and is conveyed to the anti-slipping device 7. After being deeply penetrated by the anti-slipping device 7, it passes between the squeezing and draining rollers 3 and 4. The liquid content of the membrane fabric is controlled by adjusting the gap between the squeezing and draining rollers 3 and 4. The excess liquid squeezed out by the freeze-dried membrane fabric located on the lower side of the freeze-dried membrane fabric flows directly to the return tank 29 by gravity and returns to the impregnation tank 9 for recycling through the return pipeline. The liquid located on the upper side of the freeze-dried membrane fabric flows to the array suction rod 8 by gravity. Under the negative pressure provided by the return system, it is sucked in through the array suction holes 82 on the array suction rod 8 and enters the return system.
[0020] Please see again Figures 4 to 7 The return system includes a storage tank 1, a storage tank 2, a vacuum generator 15, a negative pressure pipeline 31, a compressed air pipeline 32, a suction pipeline 33, and a discharge pipeline 34. The two ends of the negative pressure pipeline 31 are connected to the storage tank 1 and the storage tank 2, respectively. The negative pressure pipeline 31 is equipped with a vacuum generator connection port, a solenoid valve 16, and a solenoid valve 27, with the solenoid valves 16 and 27 located on opposite sides of the vacuum generator connection port. The vacuum generator 15 is connected to the vacuum generator connection port. The two ends of the compressed air pipeline 32 are connected to the negative pressure pipeline 31, and the compressed air pipeline 31 is equipped with a clean compressed air port 27, a solenoid valve 38, and a solenoid valve 49, with the solenoid valves 38 and 49 located on opposite sides of the vacuum generator connection port. Clean compressed air inlet 27 is connected to both sides of clean compressed air. Clean compressed air inlet 27 is used to connect to external compressed air. The two ends of suction pipe 33 are connected to liquid storage tank 1 and liquid storage tank 2 respectively. Suction pipe 33 is equipped with suction port 24, solenoid valve 5 20 and solenoid valve 6 21. Solenoid valve 5 20 and solenoid valve 6 21 are respectively located on both sides of suction port 24. Suction port 24 is connected to both ends of array suction rod 8 through connecting pipe. The two ends of discharge pipe 34 are connected to the bottom of liquid storage tank 1 and liquid storage tank 2 respectively. Discharge pipe 34 is equipped with discharge port 26, solenoid valve 7 22 and solenoid valve 8 23. Solenoid valve 7 22 and solenoid valve 8 23 are respectively located on both sides of discharge port 26. Discharge port 26 is connected to impregnation tank 9 through return pipe.
[0021] The connection ends between the negative pressure pipeline 31 and each storage tank, and between the suction pipeline 33 and each storage tank, are not shared, thus separating the gas pipeline and the liquid pipeline. Specifically, storage tank 1 and storage tank 2 are respectively equipped with a negative pressure pipeline connection port and a suction pipeline connection port. These are separate, allowing the liquid entering through the suction port 24 to enter the storage tank via the suction pipeline 33, while air is transmitted via the negative pressure pipeline 31 and the compressed air pipeline 32, achieving gas and liquid separation.
[0022] Solenoid valve 16, solenoid valve 318, solenoid valve 520 and solenoid valve 722 are used to control the passage between the corresponding pipeline and storage tank 11; solenoid valve 217, solenoid valve 419, solenoid valve 621 and solenoid valve 823 are used to control the passage between the corresponding pipeline and storage tank 22.
[0023] Liquid level sensors 35 are installed in liquid storage tank 1 and liquid storage tank 2 respectively; vacuum generator 15, liquid level sensors 35 and solenoid valves 1 to 8 are respectively connected to controller 40.
[0024] Vacuum generator 15 is used to generate negative pressure. Controller 40 achieves negative pressure in storage tank 1 or storage tank 2 by adjusting the opening and closing of solenoid valve 16, solenoid valve 27, solenoid valve 38, solenoid valve 49, solenoid valve 72, and solenoid valve 823. When there is negative pressure in storage tank 1 or storage tank 2, controller 40 adjusts the opening and closing of solenoid valve 520 and solenoid valve 621 so that the liquid on the surface of the membrane cloth enters the corresponding storage tank through the array suction rod 8, suction port 24, and suction pipe 33.
[0025] During discharge, the controller 40 controls the opening and closing of solenoid valves 3 18 and 4 19, so that the compressed air connected to the clean compressed air port 27 enters the storage tank 1 or storage tank 2, and controls the opening and closing of solenoid valves 7 22 and 8 23, so that the material in the corresponding storage tank is discharged to the impregnation tank 9 through the discharge port 26 and the return pipeline.
[0026] Specifically, the freeze-dried facial mask anti-deposition suction and circulation device of the present invention operates as follows: (1) The controller 40 controls the vacuum generator 15 to work in the negative pressure pipeline 31 to generate negative pressure; the controller 40 controls the solenoid valve 16 to open, the solenoid valve 27 and the solenoid valve 38 to close, and the solenoid valve 722 to close. The negative pressure is transmitted to the storage tank 1, and a negative pressure environment is formed in the storage tank 1. The controller 40 controls the solenoid valve 621 to close and the solenoid valve 520 to open. The negative pressure in the storage tank 1 is transmitted to the suction port 24 through the suction pipeline 33. Under the action of the negative pressure, the liquid on the surface of the membrane is sucked in by the array suction rod 8 and enters the storage tank 1 for temporary storage through the suction port 24 and the solenoid valve 520.
[0027] (2) The liquid level sensor 35 in the liquid storage tank 1 monitors the liquid level in the liquid storage tank 1 in real time and feeds it back to the controller 40. When the liquid level in the liquid storage tank 1 reaches the set value, the controller 40 controls the solenoid valve 16 to close, the solenoid valve 27 to open, the solenoid valve 49 to close, and the solenoid valve 823 to close, so that the negative pressure is transmitted to the liquid storage tank 2, and a negative pressure environment is formed in the liquid storage tank 2. The controller 40 controls the solenoid valve 520 to close and the solenoid valve 621 to open. The negative pressure inside storage tank 2 is transmitted to suction port 24 through suction pipe 33, causing the liquid on the surface of the membrane to continue to be sucked in and enter storage tank 2 for temporary storage via solenoid valve 6 21. At the same time, controller 40 controls solenoid valves 3 18 and 7 22 to open, and compressed air entering from clean compressed air port 27 enters storage tank 1 through solenoid valve 3 18, forcing the liquid accumulated in storage tank 1 out through discharge port 26 and returning to the wetting liquid tank 9 for recycling via return pipeline. In this way, the temporary storage of liquid in storage tank 22 and the discharge of liquid in storage tank 1 can be carried out simultaneously.
[0028] (3) The liquid level sensor 35 in the storage tank 2 monitors the liquid level in the storage tank 2 in real time and feeds it back to the controller 40. When the liquid level in the storage tank 2 reaches the set value, the controller 40 automatically switches the opening and closing of each solenoid valve, reconnects the storage tank 1 to the negative pressure, and at the same time, the controller 40 controls the solenoid valve 4 19 and solenoid valve 8 23 to open. The compressed air entering from the clean air port 27 enters the storage tank 2 through the solenoid valve 4 19, and pushes out the liquid accumulated in the storage tank 2 through the discharge port 23, and returns it to the wetting liquid tank 9 through the return pipeline for recycling. This alternating process realizes continuous liquid return and recycling.
[0029] As an improvement, the freeze-dried facial mask anti-deposition suction and circulation device of the present invention is equipped with liquid level observation tubes 28 on both the first liquid storage tank 1 and the second liquid storage tank 2, facilitating manual visual inspection. The first liquid storage tank 2 and the second liquid storage tank 3 are respectively mounted on a liquid storage tank support 36, and the bottom of the support 36 is equipped with casters 25 to facilitate the movement and positioning of the entire liquid return system (this structure is not required for some highly permeable liquids). For special process requirements, a filtration device (e.g., installed at the discharge port) and a temperature control module can be optionally added to further improve the purity and viscosity stability of the liquid.
[0030] The freeze-dried facial mask anti-deposition suction and circulation device of this invention ensures that the liquid is always in a relatively closed environment during the transmission process, effectively avoiding external contamination and evaporation loss, and ensuring the stability of the liquid composition. Two storage tanks form a circulating storage tank; by alternating the use of the two tanks, continuous operation of liquid intake and discharge is achieved, avoiding the supply fluctuation problem caused by the intermittent operation of traditional single tanks, and significantly improving the stability and efficiency of the wetting process. The vacuum generator uses compressed air to generate negative pressure, eliminating the need for an additional vacuum pump, resulting in a compact structure and energy saving.
[0031] In summary, the freeze-dried facial mask anti-deposition suction and circulation device of the present invention, by setting a suction component with negative pressure suction function at the extrusion discharge station, draws the liquid material on the surface of the extruded membrane back into the circulation storage tank in real time, and then transports the liquid material to the immersion tank through the circulation storage tank. This effectively avoids the liquid material from depositing on the surface of the anti-deposition device, ensures the stability of the freeze-dried facial mask filling volume and the consistency of product quality, while reducing liquid material waste and lowering production costs.
[0032] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.
Claims
1. A freeze-dried facial mask anti-deposition suction and circulation device, installed at the extrusion and discharge station of a freeze-dried facial mask production line, wherein the extrusion and discharge station includes a frame and an anti-sag device disposed therein, characterized in that, The material suction and circulation device includes a material suction assembly and a liquid return system, wherein: The suction assembly includes an array of suction rods, which are mounted on the frame via an adjustment mechanism and are located above the membrane fabric at the extrusion discharge station. The liquid return system includes a first liquid storage tank, a second liquid storage tank, a vacuum generator, a negative pressure pipeline, a compressed air pipeline, a suction pipeline, and a discharge pipeline. The two ends of the negative pressure pipeline are connected to the first and second liquid storage tanks, respectively. The negative pressure pipeline is equipped with a vacuum generator connection port, a solenoid valve 1, and a solenoid valve 2, with the solenoid valves 1 and 2 located on opposite sides of the vacuum generator connection port. The vacuum generator is connected to the vacuum generator connection port. The two ends of the compressed air pipeline are connected to the negative pressure pipeline. The compressed air pipeline is equipped with a clean compressed air port, a solenoid valve 3, and a solenoid valve 4, with the solenoid valves 3 and 4 located on opposite sides of the vacuum generator connection port. The clean compressed air inlet is connected to two sides for external compressed air. The two ends of the suction pipe are connected to the first and second storage tanks, respectively. The suction pipe is equipped with a suction port, a solenoid valve five, and a solenoid valve six, which are located on either side of the suction port. The suction port is connected to the array suction rod via a connecting pipe. The two ends of the discharge pipe are connected to the bottom of the first and second storage tanks, respectively. The discharge pipe is equipped with a discharge port, a solenoid valve seven, and a solenoid valve eight, which are located on either side of the discharge port. The discharge port is connected to the wetting liquid tank via a return pipe. Solenoid valve 1, solenoid valve 3, solenoid valve 5 and solenoid valve 7 are used to control the passage between the corresponding pipeline and storage tank 1; solenoid valve 2, solenoid valve 4, solenoid valve 6 and solenoid valve 8 are used to control the passage between the corresponding pipeline and storage tank 2. Liquid level sensors are respectively installed in the first and second liquid storage tanks; The vacuum generator, liquid level sensor, and solenoid valves one through eight are respectively connected to the controller.
2. The freeze-dried facial mask anti-deposition suction and circulation device according to claim 1, characterized in that, The installation and adjustment mechanism includes a mounting rod and two connecting rods. The two ends of the mounting rod are respectively mounted on the top two sides of the frame via shaft mounting seats. One end of each of the two connecting rods is movably connected to the mounting rod via a cross shaft clamp, and the other end of each of the two connecting rods is connected to the array suction rod via a shaft clamp.
3. The freeze-dried facial mask anti-deposition suction and circulation device according to claim 1, characterized in that, The array suction rod includes a hollow rod body and multiple suction holes arranged in an array thereon.
4. The freeze-dried facial mask anti-deposition suction and circulation device according to claim 1, characterized in that, The vacuum generator is used to generate negative pressure. The controller achieves negative pressure in storage tank 1 or storage tank 2 by adjusting the opening and closing of solenoid valve 1, solenoid valve 2, solenoid valve 3, solenoid valve 4, solenoid valve 7 and solenoid valve 8. When the storage tank 1 or storage tank 2 is under negative pressure, the controller adjusts the opening and closing of solenoid valve 5 and solenoid valve 6 so that the liquid on the surface of the membrane cloth enters the corresponding storage tank through the array of suction rods, suction port and suction pipe. During material discharge, the controller controls the opening and closing of solenoid valves three and four, allowing compressed air from the clean compressed air inlet to enter storage tank one or storage tank two. It also controls the opening and closing of solenoid valves seven and eight to discharge the material in the corresponding storage tank through the discharge port and return pipeline to the impregnation tank.
5. The freeze-dried facial mask anti-deposition suction and circulation device according to claim 4, characterized in that, The controller controls the vacuum generator to operate in the negative pressure pipeline to generate negative pressure; the controller controls solenoid valve one to open, solenoid valves two and three to close, and solenoid valve seven to close, the negative pressure is transmitted to the liquid storage tank one, a negative pressure environment is formed in the liquid storage tank one, the controller controls solenoid valve six to close and solenoid valve five to open, the negative pressure in the liquid storage tank one is transmitted to the suction port through the suction pipeline, under the action of negative pressure, the liquid is sucked in by the array suction rod, and enters the liquid storage tank one for temporary storage through the suction port and solenoid valve five; The liquid level sensor in the first storage tank monitors the liquid level in the first storage tank in real time and feeds it back to the controller. When the liquid level in the first storage tank reaches the set value, the controller controls the solenoid valve 1 to close, the solenoid valve 2 to open, the solenoid valve 4 to close, and the solenoid valve 8 to close, so that negative pressure is transmitted to the second storage tank, and a negative pressure environment is formed in the second storage tank. The controller controls the solenoid valve 5 to close and the solenoid valve 6 to open. The negative pressure in the second storage tank is transmitted to the suction port through the suction pipe, so that the liquid continues to be sucked in and enters the second storage tank for temporary storage through the solenoid valve 6. At the same time, the controller controls the opening of solenoid valves three and seven, and the compressed air entering from the clean compressed air port enters the liquid storage tank one through solenoid valve three, and the liquid accumulated in the liquid storage tank one is pushed out through the discharge port and returned to the impregnation liquid tank for recycling through the return pipeline; The liquid level sensor in the second storage tank monitors the liquid level in the second storage tank in real time and feeds it back to the controller. When the liquid level in the second storage tank reaches the set value, the controller automatically switches the opening and closing of each solenoid valve, reconnects the first storage tank to negative pressure, and at the same time controls the opening of solenoid valves four and eight. Compressed air entering from the clean air port enters the second storage tank through solenoid valve four, and the liquid accumulated in the second storage tank is forced out through the discharge port and returned to the impregnation tank for recycling through the return pipeline. This alternation is repeated to achieve continuous liquid return and recycling.
6. The freeze-dried facial mask anti-deposition suction and circulation device according to claim 1, characterized in that, Liquid level observation tubes are respectively installed on liquid storage tank one and liquid storage tank two.
7. The freeze-dried facial mask anti-deposition suction and circulation device according to claim 1, characterized in that, The first and second liquid storage tanks are respectively mounted on the liquid storage tank support, and the bottom of the liquid storage tank support is equipped with casters.
8. The freeze-dried facial mask anti-deposition suction and circulation device according to claim 1, characterized in that, A pair of conveying fabric rollers are provided on the front side of the frame, and a pair of squeezing and draining rollers are provided on the rear side of the frame; the anti-slipping device is provided between the conveying fabric rollers and the squeezing and draining rollers. The wetting solution tank is located at the front of the frame; A return liquid tank is provided below the extrusion discharge roller, and the return liquid tank is connected to the impregnation liquid tank through a return pipeline.