A low-temperature extraction device for rosemary leaves with high extraction efficiency and its preparation method

Abstract

The present invention discloses a low-temperature extraction device and preparation method for rosemary leaves with high extraction efficiency, which relates to the technical field of low-temperature extraction of rosemary leaves, and includes a low-temperature vacuum drying chamber, a crushing chamber, an extraction chamber and an extraction box body. The top of the inner wall of the extraction box body is provided with a low-temperature vacuum drying chamber. Through the settings of the temperature and humidity acquisition module and the pressure acquisition module, the temperature, humidity and pressure conditions in the low-temperature vacuum drying chamber can be monitored in real time. Through the central control module, the programmable PLC controller, the actuator and the touch display screen, the temperature, humidity and pressure in the low-temperature vacuum drying chamber can be adjusted. Through the setting of the refrigeration compressor, the temperature of the low-temperature vacuum drying chamber is kept below 0°C, which can reduce the growth of microorganisms and the loss of volatile components. Through the setting of the vacuum pump, the effect of reducing oxidation can be achieved, thereby retaining the internal extract components of the rosemary leaves and improving the subsequent extraction efficiency and extraction effect.

Description

Technical Field

[0001] The present invention relates to the technical field of low-temperature extraction of rosemary leaves, and specifically provides a low-temperature extraction device for rosemary leaves with high extraction efficiency and a preparation method thereof. Background Art

[0002] Rosemary leaves are the leaves of rosemary, with a tea fragrance, spicy and slightly bitter taste. Extracts with excellent antioxidant properties can be extracted from rosemary leaves, and these extracts can be widely used in the preservation of medicines, fried foods, oil-rich foods, and various oils. However, when traditional devices extract the extracts of rosemary leaves, they usually use normal-temperature extraction, which has the problems of long time and low extraction efficiency. A low-temperature extraction device for rosemary leaves with high extraction efficiency can solve the above problems.

[0003] The defects of existing low-temperature extraction devices for rosemary leaves are as follows:

[0004] 1. Patent document JP2001335419A discloses the use of its volatile extracts and cosmetics. However, in the above document, it is necessary to keep the rosemary leaves dry before extraction. However, during the drying process, the internal extract components of the rosemary leaves are easily oxidized or the extract components volatilize, resulting in the technical problem of reduced extraction efficiency.

[0005] 2. Patent document JP2002338991A discloses an extraction method for plant extracts and its extraction device. However, in the above document, the method of obtaining extracts is to directly extract the whole plant, which not only easily causes a decrease in extraction efficiency but also easily causes a decrease in extraction amount.

[0006] 3. Patent document JP2008055246A discloses an extraction distillation device. However, in the above document, extracts are obtained by distillation, but there is a technical problem that it is difficult to extract extract components that are not easily volatile.

[0007] 4. Patent document CN106701316B discloses a preparation device dedicated to rosemary compound extracts. However, in the above document, during the extraction process, it is necessary to manually transport the rosemary leaves, which easily causes the technical problem of reduced extraction efficiency. Summary of the Invention

[0008] The purpose of the present invention is to provide a low-temperature extraction device for rosemary leaves with high extraction efficiency and a preparation method thereof, so as to solve the technical problems proposed in the above background art.

[0009] To achieve the above object, the present invention provides the following technical solution: A low-temperature extraction device for rosemary leaves with high extraction efficiency, comprising a low-temperature vacuum drying chamber, a pulverizing chamber, an extraction chamber and an extraction box body. The top of the inner wall of the extraction box body is provided with a low-temperature vacuum drying chamber, the middle of the inner wall of the extraction box body is provided with a pulverizing chamber, and the bottom of the inner wall of the extraction box body is provided with an extraction chamber;

[0010] A central control housing is fitted and installed at the top of the front surface of the extraction box body. A central control module is installed on the inner wall of the central control housing. The central control module is respectively connected to a touch display screen, a temperature and humidity acquisition module and a pressure acquisition module through two-way electrical connection. The touch display screen is fitted and installed at the top of the front surface of the central control housing. The temperature and humidity acquisition module and the pressure acquisition module are fitted and installed on the inner wall of the low-temperature vacuum drying chamber. The central control module is connected to a programmable PLC controller through two-way electrical connection. The programmable PLC controller is electrically connected to an actuator;

[0011] The actuator includes a refrigeration compressor, a vacuum pump, a microwave generator and an electromagnetic air release valve. The refrigeration compressor and the vacuum pump are both installed on one side of the low-temperature vacuum drying chamber. The microwave generator is fitted and installed on the inner wall of the low-temperature vacuum drying chamber. An exhaust pipe is installed on the inner wall of the electromagnetic air release valve, and the bottom of the outer wall of the exhaust pipe penetrates and is installed on one side of the top of the low-temperature vacuum drying chamber.

[0012] Preferably, a feed pipe penetrates and is installed in the middle of the top of the low-temperature vacuum drying chamber. A sealing cover is threadedly installed at the top of the feed pipe. A support frame is installed on the inner bottom wall of the low-temperature vacuum drying chamber. A material rack is installed on the top of the support frame. A discharge pipe is arranged at the bottom of the support frame. A material sealing solenoid valve is installed at one end of the discharge pipe. An observation window is fitted and installed on one side of the low-temperature vacuum drying chamber.

[0013] Preferably, arc-shaped holes are opened at the front ends and the tail ends on both sides of the support frame. Arc-shaped rods are movably connected to the inner walls of the arc-shaped holes. One end of the arc-shaped rod is installed with a partition filter plate, and one end of the partition filter plate is installed at the bottom of the material rack through a hinge. The other end of the arc-shaped rod is installed with a rope. A pressure spring is installed on the outer wall of the arc-shaped rod. One end of the rope is installed with a second telescopic cylinder, and the bottoms of the second telescopic cylinders are installed on the inner bottom wall of the low-temperature vacuum drying chamber.

[0014] Preferably, a transmission chamber is installed on the front surface of the pulverizing chamber. A fixing plate is installed at the top of the front surface of the transmission chamber. A servo motor is installed at the bottom of the fixing plate. The servo motor is connected to the programmable PLC controller through two-way electrical connection. The output end of the servo motor is installed with a first transmission roller. One end of the first transmission roller penetrates through one side of the transmission chamber and is installed with a first gear. A second gear is installed on the outer wall of the first gear. Pulverizing rollers are installed at one ends of the first gear and the second gear.

[0015] Preferably, transfer chambers are installed on both sides of the crushing chamber. A set of through slots are provided on one side of each of the transfer chamber and the crushing chamber. Conveyor rollers are installed at the top and bottom of the inner wall of the transfer chamber. A conveyor belt is installed on the outer wall of the conveyor rollers. A number of conveying plates are installed on the outer wall of the conveyor belt. Second drive rollers are installed on the front of the conveyor rollers. First drive belts are installed at the front ends of the outer walls of the second drive rollers. Second drive belts are installed at the rear ends of the outer walls of the second drive rollers. And the other end of the inner wall of the second drive belt is installed on the outer wall of the first drive roller. A T-shaped plate is installed at the bottom of the inner wall of the crushing chamber.

[0016] Preferably, support plates are installed on both sides of the T-shaped plate through hinges. A third telescopic cylinder is installed in the middle of the bottom of the T-shaped plate. A chute is provided in the middle of the outer wall of the support plate. A slider is installed on the inner wall of the chute. And the bottom of the slider is installed on the output end of the third telescopic cylinder. First rotating shafts are installed on both sides of the slider. Support rods are installed on the outer walls of the first rotating shafts. The other ends of the support rods are installed with second rotating shafts. And one end of the second rotating shaft is installed at the bottom of the support plate.

[0017] Preferably, a weighing plate is installed on the inner bottom wall of the extraction chamber. A weighing sensor is installed at the bottom of the weighing plate. And the weighing sensor is electrically connected to the central control module bidirectionally. An ultrasonic generator is installed on the front of the extraction chamber. An ethanol aqueous solution inlet pipe is installed at the top of the outer wall of the extraction chamber. A drain pipe penetrates and is installed at the bottom of the inner wall of the extraction chamber.

[0018] Preferably, one end of the drain pipe is installed with a water pump. The output end of the water pump is connected to a filtration chamber through a pipeline. And the filtration chamber is installed on one side of the extraction chamber. An activated carbon filter screen is installed at the top of the inner wall of the filtration chamber.

[0019] Preferably, the working steps of the rosemary leaf low-temperature extraction device with high extraction efficiency are as follows:

[0020] S1. Put rosemary leaves into the material rack in the low-temperature vacuum drying chamber through the feed pipe. Control the refrigeration compressor to refrigerate through the central control module controlling the programmable PLC controller until the rosemary leaves are completely frozen through.

[0021] S2. After being frozen through, start the vacuum pump to pump air through the central control module. Through the temperature and humidity acquisition module and the pressure acquisition module, the collected data is displayed on the touch display screen in real time for easy viewing. After the pressure in the low-temperature vacuum drying chamber reaches the requirement, the microwave generator provides heat to sublimate the ice to achieve the drying purpose. And the steam generated during the sublimation process can be discharged through the exhaust pipe by opening the electromagnetic air release valve, thereby obtaining dried rosemary leaves.

[0022] S3. Drive the rope to move through the second telescopic cylinder, thereby adjusting the angle of the partition filter plate, so that the dried rosemary leaves fall into the discharge pipe. Then, open the material sealing solenoid valve through the central control module, so that the dried rosemary leaves can fall into the crushing chamber. Crush the dried rosemary leaves through a set of crushing rollers. Through the setting of the transfer chamber, transport the crushed rosemary leaves repeatedly to the position of the crushing rollers, and crush the dried rosemary leaves multiple times to improve the crushing effect;

[0023] S4. Obtain the weight of the crushed rosemary leaves through the weighing sensor. Then, calculate the ethanol aqueous solution to be added according to the weight of the rosemary leaves. Use the ultrasonic generator to obtain the rosemary leaf ethanol extraction solution. Transport the rosemary leaf ethanol extraction solution to the filtration chamber through a water pump for filtration and drying, and finally obtain the rosemary leaf extract.

[0024] Preferably, the following steps are further included in the step S3:

[0025] S31. The rotation of the servo motor can drive the first transmission roller and the first gear to rotate. The rotation of the first gear can drive the second gear to rotate, and then can drive the two crushing rollers to rotate. Through the setting of the second transmission belt, the second transmission roller and the first transmission belt, the rotation of the servo motor can drive the first transmission roller and the second transmission roller to rotate at the same time, and then drive the conveyor belt and the conveyor plate to move to complete the transportation of the rosemary leaves;

[0026] The following steps are further included in the step S4:

[0027] S41. Through the setting of the first rotating shaft, the support rod and the second rotating shaft, the movement of the third telescopic cylinder can drive the slider and the first rotating shaft to move, thereby being able to adjust the angle of the support plate, and then make the crushed rosemary leaves fall into the extraction chamber.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. Through the setting of the temperature and humidity acquisition module and the pressure acquisition module, the present invention can monitor the temperature, humidity and pressure conditions in the low-temperature vacuum drying chamber in real time. Through the central control module, the programmable PLC controller, the actuator and the touch display screen, the temperature, humidity and pressure in the low-temperature vacuum drying chamber can be adjusted. Through the setting of the refrigeration compressor, the temperature of the low-temperature vacuum drying chamber is kept below 0°C, which can reduce the growth of microorganisms and the loss of volatile components. Through the setting of the vacuum pump, the effect of reducing oxidation can be achieved, and then the internal extract components of the rosemary leaves can be retained, improving the subsequent extraction efficiency and extraction effect;

[0030] 2. In the present invention, a servo motor drives the first drive roller and the first gear to rotate. The rotation of the first gear can drive the second gear to rotate, and further drive the two crushing rollers to rotate, completing the crushing process of rosemary leaves. At the same time, through the settings of the second conveyor belt, the second drive roller and the first conveyor belt, the rotation of the first drive roller can drive the two second drive rollers to rotate, and further drive the conveyor belt in the conveying chamber to move. Through the conveyor belt and the conveying plate, the crushed rosemary leaves can be transported to the top of the crushing rollers again for re-crushing. There is no need for manual transportation, which can improve the crushing effect and efficiency of rosemary leaves, and further improve the extraction efficiency and effect during extraction;

[0031] 3. Through the settings of the weighing plate and the weighing sensor in the present invention, the crushed rosemary leaves can be weighed. Then, according to the weight of the crushed rosemary leaves, the content of the ethanol aqueous solution to be added can be accurately obtained. Coupled with the setting of the ultrasonic generator, the emitted ultrasonic waves can cause the rupture of plant cell walls and the entire organism, and the entire rupture process is completed instantaneously. Therefore, it is beneficial to improve the extraction effect and efficiency of rosemary leaves;

[0032] 4. In the present invention, the second telescopic cylinder can pull the rope to move, and the rope can pull the arc-shaped rod to move along the arc-shaped hole. Further, the angle of the partition filter plate can be adjusted, enabling the dried rosemary leaves to fall into the discharge pipe. By controlling the switch of the material sealing solenoid valve, the rosemary leaves can fall from the discharge pipe into the crushing chamber. The third telescopic cylinder can drive the slider to move in the chute. Through the settings of the first rotating shaft, the support rod and the second rotating shaft, the movement of the slider can adjust the angle of the support plate, and further adjust the crushed rosemary leaves to fall into the extraction chamber or the conveying chamber. The conveying process can be automatically completed by the central control module and the programmable PLC controller, without manual transportation of rosemary leaves, which can improve the transportation efficiency and further improve the extraction efficiency of rosemary leaves. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of the system of the present invention;

[0034] Figure 2 is a schematic overall structural diagram of the present invention;

[0035] Figure 3 is a schematic structural diagram of the low-temperature vacuum drying chamber of the present invention;

[0036] Figure 4 is a schematic structural diagram of the crushing chamber of the present invention;

[0037] Figure 5 is a schematic structural diagram of the extraction chamber of the present invention;

[0038] Figure 6 is a schematic structural diagram of the crushing roller of the present invention;

[0039] Figure 7 This is a schematic flow diagram of the present invention.

[0040] In the figure: 1. Low-temperature vacuum drying chamber; 2. Crushing chamber; 3. Extraction chamber; 4. Extraction box body; 5. Central control housing; 6. Central control module; 7. Touch display screen; 8. Temperature and humidity acquisition module; 9. Pressure acquisition module; 10. Programmable PLC controller; 11. Actuator; 12. Refrigeration compressor; 13. Vacuum pump; 14. Microwave generator; 15. Electromagnetic air release valve; 16. Exhaust pipe; 17. Feed pipe; 18. Sealing cover; 19. Support frame; 20. Material rack; 21. Discharge pipe; 22. Material sealing solenoid valve; 23. Observation window; 24. Pressure spring; 25. Arc-shaped hole; 26. Arc-shaped rod; 27. Partition filter plate; 28. Rope; 29. Second telescopic cylinder; 32. Transmission chamber; 33. Fixed plate; 34. Servo motor; 35. First transmission roller; 36. First gear; 37. Second gear; 38. Crushing roller; 39. Transmission chamber; 40. Conveyor roller; 41. Conveyor belt; 42. Conveyor plate; 43. Through groove; 44. Second transmission roller; 45. First transmission belt; 46. Second transmission belt; 47. T-shaped plate; 48. Support plate; 49. Third telescopic cylinder; 50. Chute; 51. Slide block; 53. First rotating shaft; 54. Support rod; 55. Second rotating shaft; 56. Weighing plate; 57. Weighing sensor; 58. Ultrasonic generator; 59. Ethanol aqueous solution inlet pipe; 60. Drain pipe; 61. Water pump; 62. Filtration chamber; 63. Activated carbon filter screen. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] Embodiment 1: Please refer to Figure 1 、 Figure 2 and Figure 3 , an embodiment provided by the present invention: a low-temperature extraction device for rosemary leaves with high extraction efficiency, including a low-temperature vacuum drying chamber 1, a crushing chamber 2, an extraction chamber 3 and an extraction box body 4. The top of the inner wall of the extraction box body 4 is provided with a low-temperature vacuum drying chamber 1, the middle of the inner wall of the extraction box body 4 is provided with a crushing chamber 2, and the bottom of the inner wall of the extraction box body 4 is provided with an extraction chamber 3;

[0045] The top of the front of the extraction box body 4 is fitted and installed with a central control shell 5. The inner wall of the central control shell 5 is installed with a central control module 6. The central control module 6 is respectively connected to a touch display screen 7, a temperature and humidity acquisition module 8 and a pressure acquisition module 9 through bidirectional electrical connection. The touch display screen 7 is fitted and installed on the top of the front of the central control shell 5, and the temperature and humidity acquisition module 8 and the pressure acquisition module 9 are fitted and installed on the inner wall of the low-temperature vacuum drying chamber 1. The central control module 6 is connected to a programmable PLC controller 10 through bidirectional electrical connection, and the programmable PLC controller 10 is electrically connected to an actuator 11;

[0046] The actuator 11 includes a refrigeration compressor 12, a vacuum pump 13, a microwave generator 14 and an electromagnetic air release valve 15. The refrigeration compressor 12 and the vacuum pump 13 are both installed on one side of the low-temperature vacuum drying chamber 1, the microwave generator 14 is fitted and installed on the inner wall of the low-temperature vacuum drying chamber 1, the inner wall of the electromagnetic air release valve 15 is installed with an exhaust pipe 16, and the bottom of the outer wall of the exhaust pipe 16 penetrates and is installed on one side of the top of the low-temperature vacuum drying chamber 1;

[0047] Furthermore, through the settings of the temperature and humidity acquisition module 8 and the pressure acquisition module 9, the temperature, humidity and pressure conditions in the low-temperature vacuum drying chamber 1 can be monitored in real time. Through the central control module 6, the programmable PLC controller 10, the actuator 11 and the touch display screen 7, the temperature, humidity and pressure in the low-temperature vacuum drying chamber 1 can be adjusted. Through the setting of the refrigeration compressor 12, the temperature of the low-temperature vacuum drying chamber 1 is maintained below 0 °C, which can reduce the growth of microorganisms and the loss of volatile components. Through the setting of the vacuum pump 13, the effect of reducing oxidation can be achieved, and thus the internal extract components of the rosemary leaves can be retained, improving the subsequent extraction efficiency and extraction effect.

[0048] Example 2: Please refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 6 , an embodiment provided by the present invention: a low-temperature extraction device for rosemary leaves with high extraction efficiency. A transmission chamber 32 is installed on the front of the crushing chamber 2. A fixing plate 33 is installed at the top of the front of the transmission chamber 32. A servo motor 34 is installed at the bottom of the fixing plate 33, and the servo motor 34 is electrically connected to the programmable PLC controller 10 in a two-way manner. The output end of the servo motor 34 is installed with a first transmission roller 35. One end of the first transmission roller 35 penetrates through one side of the transmission chamber 32 and is installed with a first gear 36. A second gear 37 is installed on the outer wall of the first gear 36. Crushing rollers 38 are installed at one ends of the first gear 36 and the second gear 37 respectively;

[0049] Transfer chambers 39 are installed on both sides of the crushing chamber 2. A set of through grooves 43 are opened on one side of each of the transfer chamber 39 and the crushing chamber 2. Conveyor rollers 40 are installed at the top and bottom of the inner wall of the transfer chamber 39. A conveyor belt 41 is installed on the outer wall of the conveyor roller 40. A number of conveying plates 42 are installed on the outer wall of the conveyor belt 41. Second transmission rollers 44 are installed on the front of the conveyor rollers 40. First transmission belts 45 are installed at the front ends of the outer walls of the second transmission rollers 44. Second transmission belts 46 are installed at the rear ends of the outer walls of the second transmission rollers 44, and the other end of the inner wall of the second transmission belt 46 is installed on the outer wall of the first transmission roller 35. A T-shaped plate 47 is installed at the bottom of the inner wall of the crushing chamber 2;

[0050] Further, the servo motor 34 drives the first transmission roller 35 and the first gear 36 to rotate. The rotation of the first gear 36 can drive the second gear 37 to rotate, and then can drive the two crushing rollers 38 to rotate, completing the crushing process of the rosemary leaves. At the same time, through the settings of the second transmission belt 46, the second transmission roller 44 and the first transmission belt 45, the rotation of the first transmission roller 35 can drive the two second transmission rollers 44 to rotate, and then can drive the conveyor belt 41 in the transfer chamber 39 to move. Through the conveyor belt 41 and the conveying plates 42, the crushed rosemary leaves can be transported to the top of the crushing rollers 38 again for re-crushing. There is no need for manual transportation, which can improve the crushing effect and efficiency of the rosemary leaves, and thus improve the extraction efficiency and effect during extraction.

[0051] Example 3: Please refer to Figure 1 、 Figure 2 and Figure 5, An embodiment provided by the present invention: A low-temperature extraction device for rosemary leaves with high extraction efficiency. A weighing plate 56 is installed on the inner bottom wall of the extraction chamber 3. A weighing sensor 57 is installed at the bottom of the weighing plate 56, and the weighing sensor 57 is electrically connected to the central control module 6 in a two-way manner. An ultrasonic generator 58 is installed on the front of the extraction chamber 3. An ethanol aqueous solution inlet pipe 59 is installed at the top of the outer wall of the extraction chamber 3. A drain pipe 60 is installed through the bottom of the inner wall of the extraction chamber 3;

[0052] One end of the drain pipe 60 is installed with a water pump 61. The output end of the water pump 61 is connected to a filtration chamber 62 through a pipeline, and the filtration chamber 62 is installed on one side of the extraction chamber 3. An activated carbon filter screen 63 is installed at the top of the inner wall of the filtration chamber 62;

[0053] Furthermore, through the settings of the weighing plate 56 and the weighing sensor 57, it is possible to weigh the crushed rosemary leaves, and then accurately obtain the content of the ethanol aqueous solution to be added according to the weight of the crushed rosemary leaves. Coupled with the setting of the ultrasonic generator 58, the extraction effect and extraction efficiency of the rosemary leaves are improved, and an ethanol extraction solution of rosemary leaves is obtained. Then, the obtained solution is transported into the filtration chamber 62 by the water pump 61, and the impurities in the solution are filtered through the activated carbon filter screen 63. Finally, the filtered solution is dried to obtain the extract of rosemary leaves.

[0054] Example 4: Please refer to Figure 2 , Figure 3 and Figure 4 , An embodiment provided by the present invention: A low-temperature extraction device for rosemary leaves with high extraction efficiency. A feed pipe 17 is installed through the middle of the top of the low-temperature vacuum drying chamber 1. A sealing cover 18 is installed on the top of the feed pipe 17 in a threaded manner. A support frame 19 is installed on the inner bottom wall of the low-temperature vacuum drying chamber 1. A material rack 20 is installed on the top of the support frame 19. A discharge pipe 21 is arranged at the bottom of the support frame 19. A material sealing electromagnetic valve 22 is installed at one end of the discharge pipe 21. An observation window 23 is installed in a fitted manner on one side of the low-temperature vacuum drying chamber 1;

[0055] Arc-shaped holes 25 are opened at the front and rear ends on both sides of the support frame 19. An arc-shaped rod 26 is movably connected to the inner wall of the arc-shaped hole 25. One end of the arc-shaped rod 26 is installed with a partition filter plate 27, and one end of the partition filter plate 27 is installed at the bottom of the material rack 20 through a hinge. The other end of the arc-shaped rod 26 is installed with a rope 28. A pressure spring 24 is installed on the outer wall of the arc-shaped rod 26. One end of the rope 28 is installed with a second telescopic cylinder 29, and the bottom of the second telescopic cylinder 29 is installed on the inner bottom wall of the low-temperature vacuum drying chamber 1;

[0056] On both sides of the T-shaped plate 47, support plates 48 are installed through hinges. In the middle of the bottom of the T-shaped plate 47, a third telescopic cylinder 49 is installed. In the middle of the outer wall of the support plate 48, a chute 50 is opened. Inside the inner wall of the chute 50, a slider 51 is installed, and the bottom of the slider 51 is installed at the output end of the third telescopic cylinder 49. On both sides of the slider 51, a first rotating shaft 53 is installed. On the outer wall of the first rotating shaft 53, a support rod 54 is installed. The other end of the support rod 54 is installed with a second rotating shaft 55, and one end of the second rotating shaft 55 is installed at the bottom of the support plate 48;

[0057] Furthermore, the second telescopic cylinder 29 can pull the rope 28 to move. The rope 28 can pull the arc-shaped rod 26 to move along the arc-shaped hole 25, thereby being able to adjust the angle of the partition filter plate 27, enabling the dried rosemary leaves to fall into the discharge pipe 21. By controlling the switch of the material sealing electromagnetic valve 22, the rosemary leaves can fall from the discharge pipe 21 into the crushing chamber 2. The third telescopic cylinder 49 can drive the slider 51 to move in the chute 50. Through the setting of the first rotating shaft 53, the support rod 54, and the second rotating shaft 55, the movement of the slider 51 can adjust the angle of the support plate 48, thereby being able to adjust the crushed rosemary leaves to fall into the extraction chamber 3 or the transfer chamber 39. The conveying process can be automatically completed by the central control module 6 and the programmable PLC controller 10, without manual transportation of the rosemary leaves, which can improve the transportation efficiency and thus improve the extraction efficiency of the rosemary leaves.

[0058] Example 5: Please refer to Figure 7 , an embodiment provided by the present invention: A low-temperature extraction device for rosemary leaves with high extraction efficiency. The working steps of the low-temperature extraction device for rosemary leaves with high extraction efficiency are as follows:

[0059] S1. Put the rosemary leaves into the material rack 20 in the low-temperature vacuum drying chamber 1 through the feed pipe 17. The central control module 6 controls the programmable PLC controller 10 to control the refrigeration compressor 12 for refrigeration until the rosemary leaves are completely frozen through;

[0060] S2. After being frozen through, the central control module 6 starts the vacuum pump 13 to start pumping air. Through the temperature and humidity acquisition module 8 and the pressure acquisition module 9, the collected data is displayed on the touch display screen 7 in real time for easy viewing. After the pressure in the low-temperature vacuum drying chamber 1 reaches the requirement, the microwave generator 14 provides heat to sublime the ice to achieve the drying purpose, and the steam generated during the sublimation process can be discharged through the exhaust pipe 16 by opening the electromagnetic air release valve 15, thereby obtaining the dried rosemary leaves;

[0061] S3. Drive the rope 28 to move through the second telescopic cylinder 29, thereby adjusting the angle of the partition filter plate 27, causing the dried rosemary leaves to fall into the discharge pipe 21. Then, open the material sealing solenoid valve 22 through the central control module 6, enabling the dried rosemary leaves to fall into the pulverizing chamber 2. Pulverize the dried rosemary leaves through a set of pulverizing rollers 38. Through the arrangement of the transfer chamber 39, transport the pulverized rosemary leaves repeatedly to the position of the pulverizing rollers 38 to pulverize the dried rosemary leaves multiple times, improving the pulverizing effect.

[0062] S4. Obtain the weight of the pulverized rosemary leaves through the weighing sensor 57. Then, calculate the ethanol aqueous solution to be added according to the weight of the rosemary leaves. Next, use the ultrasonic generator 58 to obtain the rosemary leaf ethanol extraction solution. Transport the rosemary leaf ethanol extraction solution to the filtration chamber 62 through the water pump 61 for filtration and drying, finally obtaining the rosemary leaf extract.

[0063] The following steps are also included in step S3:

[0064] S31. The rotation of the servo motor 34 can drive the first transmission roller 35 and the first gear 36 to rotate. The rotation of the first gear 36 can drive the second gear 37 to rotate, thereby driving the two pulverizing rollers 38 to rotate. Through the arrangement of the second transmission belt 46, the second transmission roller 44, and the first transmission belt 45, the rotation of the servo motor 34 can drive the first transmission roller 35 and the second transmission roller 44 to rotate simultaneously, thereby driving the conveyor belt 41 and the conveyor plate 42 to move, completing the transportation of the rosemary leaves.

[0065] The following steps are also included in step S4:

[0066] S41. Through the arrangement of the first rotating shaft 53, the support rod 54, and the second rotating shaft 55, the movement of the third telescopic cylinder 49 can drive the slider 51 and the first rotating shaft 53 to move, thereby adjusting the angle of the support plate 48, causing the pulverized rosemary leaves to fall into the extraction chamber 3.

[0067] Working principle: Through the settings of the temperature and humidity acquisition module 8 and the pressure acquisition module 9, the temperature, humidity and pressure conditions in the low-temperature vacuum drying chamber 1 can be monitored in real time. Through the central control module 6, the programmable PLC controller 10, the actuator 11 and the touch display screen 7, the temperature, humidity and pressure in the low-temperature vacuum drying chamber 1 can be adjusted. Through the setting of the refrigeration compressor 12, the temperature of the low-temperature vacuum drying chamber 1 is maintained below 0 °C, which can reduce the growth of microorganisms and the loss of volatile components. Through the setting of the vacuum pump 13, the effect of reducing oxidation can be achieved, thereby retaining the internal extract components of rosemary leaves and improving the subsequent extraction efficiency and extraction effect. The servo motor 34 drives the first transmission roller 35 and the first gear 36 to rotate. The rotation of the first gear 36 can drive the second gear 37 to rotate, and then drive the two crushing rollers 38 to rotate, completing the crushing process of rosemary leaves. At the same time, through the settings of the second transmission belt 46, the second transmission roller 44 and the first transmission belt 45, the rotation of the first transmission roller 35 can drive the two second transmission rollers 44 to rotate, and then drive the conveyor belt 41 in the conveying chamber 39 to move. Through the conveyor belt 41 and the conveying plate 42, the crushed rosemary leaves can be transported to the top of the crushing roller 38 again for re-crushing, eliminating the need for manual transportation, improving the crushing effect and efficiency of rosemary leaves, and further improving the extraction efficiency and effect during extraction. Through the settings of the weighing plate 56 and the weighing sensor 57, the crushed rosemary leaves can be weighed, and then the content of the ethanol aqueous solution to be added can be accurately obtained according to the weight of the crushed rosemary leaves. Combined with the setting of the ultrasonic generator 58, the extraction effect and efficiency of rosemary leaves can be improved to obtain the ethanol extraction solution of rosemary leaves. Then, the obtained solution is transported to the filtration chamber 62 by the water pump 61, and the impurities in the solution are filtered by the activated carbon filter screen 63. Finally, the filtered solution is dried to obtain the extract of rosemary leaves. The second telescopic cylinder 29 can pull the rope 28 to move, and the rope 28 can pull the arc rod 26 to move along the arc hole 25, thereby adjusting the angle of the partition filter plate 27, enabling the dried rosemary leaves to fall into the discharge pipe 21. By controlling the switch of the material sealing electromagnetic valve 22, the rosemary leaves can fall from the discharge pipe 21 into the crushing chamber 2. The third telescopic cylinder 49 can drive the slider 51 to move in the chute 50. Through the settings of the first rotating shaft 53, the support rod 54 and the second rotating shaft 55, the movement of the slider 51 can adjust the angle of the support plate 48, and then adjust the crushed rosemary leaves to fall into the extraction chamber 3 or the conveying chamber 39. The conveying process can be automatically completed by the central control module 6 and the programmable PLC controller 10, eliminating the need for manual transportation of rosemary leaves, improving the transportation efficiency, and further improving the extraction efficiency of rosemary leaves.

[0068] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in all respects, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Thus, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A rosemary leaf low-temperature extraction device with high extraction efficiency, comprising a low-temperature vacuum drying chamber (1), a crushing chamber (2), an extraction chamber (3) and an extraction box (4), characterized in that: A low-temperature vacuum drying chamber (1) is provided at the top of the inner wall of the extraction box (4), a crushing chamber (2) is provided at the middle of the inner wall of the extraction box (4), and an extraction chamber (3) is provided at the bottom of the inner wall of the extraction box (4); A central control shell (5) is mounted on the top of the front of the extraction box (4), a central control module (6) is mounted on the inner wall of the central control shell (5), the central control module (6) is respectively connected to a touch screen (7), a temperature and humidity acquisition module (8) and a pressure acquisition module (9) via bidirectional electrical connections, and the touch screen (7) is mounted on the top of the front of the central control shell (5), the temperature and humidity acquisition module (8) and the pressure acquisition module (9) are mounted on the inner wall of the low-temperature vacuum drying chamber (1), the central control module (6) is bidirectionally electrically connected to a programmable PLC controller (10), and the programmable PLC controller (10) is electrically connected to an actuator (11); The actuator (11) comprises a refrigeration compressor (12), a vacuum air pump (13), a microwave generator (14) and an electromagnetic air release valve (15), wherein the refrigeration compressor (12) and the vacuum air pump (13) are both installed on one side of the low-temperature vacuum drying chamber (1), and the microwave generator (14) is embedded in the inner wall of the low-temperature vacuum drying chamber (1), and an exhaust pipe (16) is installed on the inner wall of the electromagnetic air release valve (15), and the bottom of the outer wall of the exhaust pipe (16) is installed through one side of the top of the low-temperature vacuum drying chamber (1); A support frame (19) is installed on the inner bottom wall of the low-temperature vacuum drying chamber (1), and a material rack (20) is installed on the top of the support frame (19). The front end and the rear end of both sides of the support frame (19) are provided with arc-shaped holes (25). The inner wall of the arc-shaped hole (25) is movably connected with an arc-shaped rod (26). A partition filter plate (27) is installed on one end of the arc-shaped rod (26), and one end of the partition filter plate (27) is installed on the bottom of the material rack (20) through a hinge. A rope (28) is installed on the other end of the arc-shaped rod (26). A pressure spring (24) is installed on the outer wall of the arc-shaped rod (26). A second telescopic cylinder (29) is installed on one end of the rope (28), and the bottom of the second telescopic cylinder (29) is installed on the inner bottom wall of the low-temperature vacuum drying chamber (1); The crushing chamber (2) is provided with a conveying chamber (39) on both sides, and a group of through grooves (43) are provided on one side of the conveying chamber (39) and the crushing chamber (2). Conveying rollers (40) are provided on the top and bottom of the inner wall of the conveying chamber (39). A conveying belt (41) is provided on the outer wall of the conveying roller (40). A plurality of conveying plates (42) are provided on the outer wall of the conveying belt (41). A second transmission roller (44) is provided on the front side of the conveying roller (40). A first transmission belt (45) is provided on the front end of the outer wall of the second transmission roller (44). A second transmission belt (46) is provided on the rear end of the outer wall of the second transmission roller (44), and the other end of the inner wall of the second transmission belt (46) is provided on the outer wall of the first transmission roller (35). A T-shaped plate (47) is provided on the bottom of the inner wall of the crushing chamber (2); Support plates (48) are mounted on both sides of the T-shaped plate (47) via hinges, a third telescopic cylinder (49) is mounted in the middle of the bottom of the T-shaped plate (47), a slide groove (50) is provided in the middle of the outer wall of the support plate (48), a slider (51) is mounted on the inner wall of the slide groove (50), and the bottom of the slider (51) is mounted on the output end of the third telescopic cylinder (49), a first rotating shaft (53) is mounted on both sides of the slider (51), a support rod (54) is mounted on the outer wall of the first rotating shaft (53), a second rotating shaft (55) is mounted on the other end of the support rod (54), and one end of the second rotating shaft (55) is mounted on the bottom of the support plate (48).

2. The rosemary leaf low temperature extraction device with high extraction efficiency according to claim 1, characterized in that: A feed pipe (17) is installed through the middle of the top of the low-temperature vacuum drying chamber (1), a sealing cover (18) is threadedly installed on the top of the feed pipe (17), a discharge pipe (21) is arranged at the bottom of the support frame (19), a material sealing solenoid valve (22) is installed at one end of the discharge pipe (21), and an observation window (23) is embedded and installed on one side of the low-temperature vacuum drying chamber (1).

3. The rosemary leaf low temperature extraction device with high extraction efficiency according to claim 2, characterized in that: A transmission chamber (32) is installed on the front of the pulverizing chamber (2), a fixing plate (33) is installed on the top of the front of the transmission chamber (32), a servo motor (34) is installed on the bottom of the fixing plate (33), and the servo motor (34) is connected to the programmable PLC controller (10) in a bidirectional electrical manner, a first transmission roller (35) is installed on the output end of the servo motor (34), one end of the first transmission roller (35) passes through a side of the transmission chamber (32) and is installed with a first gear (36), an outer wall of the first gear (36) is installed with a second gear (37), and one end of each of the first gear (36) and the second gear (37) is installed with a pulverizing roller (38).

4. The rosemary leaf low temperature extraction device with high extraction efficiency according to claim 3, characterized in that: A weighing plate (56) is installed on the inner bottom wall of the extraction chamber (3), a weighing sensor (57) is installed on the bottom of the weighing plate (56), and the weighing sensor (57) is connected to the central control module (6) via a bidirectional electrical connection. An ultrasonic generator (58) is installed on the front of the extraction chamber (3), an ethanol aqueous solution water inlet pipe (59) is installed on the top of the outer wall of the extraction chamber (3), and a drainage pipe (60) is installed through the bottom of the inner wall of the extraction chamber (3).

5. The rosemary leaf low temperature extraction device with high extraction efficiency according to claim 4, characterized in that: A water pump (61) is installed at one end of the liquid discharge pipe (60); the output end of the water pump (61) is connected to a filter chamber (62) via a pipeline; the filter chamber (62) is installed on one side of the extraction chamber (3); and an activated carbon filter screen (63) is installed on the top of the inner wall of the filter chamber (62).

6. The method for preparing a rosemary leaf low-temperature extraction device with high extraction efficiency according to claim 5, characterized in that: The preparation method is as follows: S1, placing rosemary leaves into a material rack (20) in a low-temperature vacuum drying chamber (1) through a feed pipe (17), and controlling a programmable PLC controller (10) to control a refrigeration compressor (12) through a central control module (6) to perform refrigeration until the rosemary leaves are completely frozen; S2, after being completely frozen, the vacuum air pump (13) is started through the central control module (6) to start exhausting air, and the collected data is displayed in real time on the touch screen (7) through the temperature and humidity collection module (8) and the pressure collection module (9) for easy viewing. After the pressure in the low-temperature vacuum drying chamber (1) reaches the required pressure, the microwave generator (14) provides heat to sublime the ice to achieve the purpose of drying, and the steam generated during the sublimation process can be discharged through the exhaust pipe (16) by opening the electromagnetic air release valve (15), thereby obtaining dried rosemary leaves; S3, driving the rope (28) to move by the second telescopic cylinder (29), thereby adjusting the angle of the partition filter plate (27), so that the dried rosemary leaves fall into the discharge pipe (21), and then opening the material sealing solenoid valve (22) by the central control module (6), so that the dried rosemary leaves can fall into the grinding chamber (2), and the dried rosemary leaves are ground by a group of grinding rollers (38). The ground rosemary leaves are repeatedly transported to the position of the grinding rollers (38) by the setting of the conveying chamber (39), and the dried rosemary leaves are ground multiple times to improve the grinding effect; S4. The weight of the crushed rosemary leaves is obtained by a weighing sensor (57), and the ethanol aqueous solution to be added is calculated according to the weight of the rosemary leaves. The rosemary leaf ethanol extract solution is obtained by using an ultrasonic generator (58), and the rosemary leaf ethanol extract solution is transported to a filter chamber (62) by a water pump (61) for filtration and drying, thereby finally obtaining a rosemary leaf extract.

7. The method for preparing a rosemary leaf low-temperature extraction device with high extraction efficiency according to claim 6, characterized in that: The step S3 also includes the following steps: S31, the rotation of the servo motor (34) can drive the first transmission roller (35) and the first gear (36) to rotate, the rotation of the first gear (36) can drive the second gear (37) to rotate, and further drive the two crushing rollers (38) to rotate, the first transmission roller (35) rotates through the second transmission belt (46), the second transmission roller (44) and the first transmission belt (45), the rotation of the servo motor (34) can simultaneously drive the first transmission roller (35) and the second transmission roller (44) to rotate, and further drive the conveyor belt (41) and the conveyor plate (42) to move, thereby completing the transportation of rosemary leaves; The step S4 also includes the following steps: S41. By arranging the first rotating shaft (53), the support rod (54) and the second rotating shaft (55), the movement of the third telescopic cylinder (49) can drive the sliding block (51) and the first rotating shaft (53) to move, thereby adjusting the angle of the support plate (48), so that the crushed rosemary leaves fall into the extraction chamber (3).

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