Natural plant essential oil low-temperature distillation extraction device and equipment

Abstract

The invention relates to the field of distillation and extraction of plant essential oil, in particular to a low-temperature distillation and extraction device and equipment for natural plant essential oil. The distillation flask is of a spherical structure; the distillation monomer device further comprises a cleaning unit and a first rotary driver; the cleaning unit is arranged right below the distillation flask; the first rotary driver is horizontally arranged on one side of the distillation flask; the cleaning unit comprises a bearing shell, a cleaning pipe and a first linear driver; the receiving shell is vertically arranged under the distillation flask, and a first water through hole is formed in the bottom of the receiving shell; the cleaning pipe vertically penetrates through the bottom of the bearing shell and is in sliding fit with the bearing shell in the vertical direction, and a spray head used for spraying out cleaning liquid is arranged at the upper end of the cleaning pipe; the first linear driver is arranged below the cleaning pipe and used for driving the cleaning pipe to move. According to the invention, automatic cleaning operation of the distillation flask is realized, and manual disassembly, cleaning and reassembly of the distillation flask are not needed in the whole process.

Description

Technical Field

[0001] This invention relates to the field of plant essential oil distillation extraction, specifically to a low-temperature distillation extraction apparatus and equipment for natural plant essential oils. Background Technology

[0002] Existing low-temperature distillation temperatures are typically between 40 and 70 degrees Celsius. Low-temperature distillation of natural plant essential oils can protect heat-sensitive components, reduce oxidative decomposition, and improve the purity and quality of the essential oils.

[0003] Chinese Patent Publication No. CN118978956A discloses a low-temperature distillation extraction process for natural plant essential oils, comprising: S1, washing and soaking the plant raw materials for a period of time, and then draining the washed raw materials; S2, crushing the drained raw materials using a crushing mechanism, and then packaging the crushed raw materials through filter gauze; S3, pressing the raw materials packaged through filter gauze in step S2 to extract liquid using a press; S4, filtering the liquid extracted in step S2 again using a filtration device to remove impurities; S5, performing low-temperature distillation on the filtered liquid, collecting the distilled liquid, condensing and cooling it, and finally separating the oil and water to extract the oil layer.

[0004] The above-mentioned solution provides a low-temperature distillation extraction process. During low-temperature distillation, as the distillation time progresses, inorganic salts, organic polymers, microparticles (plant fibers and cell debris not completely removed by filtration), and azeotropic residues appear at the bottom of the distillation flask. Although some of these residues can be removed through pre-filtration, complete removal is not possible. Therefore, the distillation flask needs to be cleaned after a period of use. In existing technologies, although two distillation flasks can be used alternately via connecting pipes to ensure continuous distillation, cleaning the flasks requires removal and reinstallation, ensuring a good seal during installation—a cumbersome process. Summary of the Invention

[0005] To address the aforementioned issues, a low-temperature distillation extraction apparatus and equipment for natural plant essential oils is provided. This apparatus utilizes a first rotary actuator to automatically rotate the distillation flask between the distillation and cleaning units. Combined with the automatic lifting and lowering of the cleaning tube, the wastewater collection function of the receiving shell, and the alternating operation of the two sets of distillation units, it achieves automated cleaning of the distillation flask without the need for manual disassembly, cleaning, or reassembly. Operators are not required to perform tedious procedures such as shutting down pipelines, venting steam, or performing leak checks; they only need to perform basic start-up, shutdown, and status monitoring of the equipment.

[0006] To address the problems of existing technologies, this invention provides a low-temperature distillation extraction device for natural plant essential oils, comprising two sets of distillation unit devices, each set of distillation unit devices being equipped with a distillation flask with an opening and a distillation unit positioned obliquely above the distillation flask; The distillation flask has a spherical structure, and the distillation unit also includes a cleaning unit and a first rotary drive; The cleaning unit is located directly below the distillation flask; The first rotary actuator is horizontally positioned on one side of the distillation flask and is used to drive the distillation flask to rotate. The opening of the distillation flask can face the distillation unit and be connected to it, or it can face vertically downwards. The cleaning unit includes a receiving housing, a cleaning tube, and a first linear actuator; The receiving shell is vertically positioned directly below the distillation flask, and a first water inlet for discharging wastewater is provided at the bottom of the receiving shell. The cleaning tube extends vertically through the bottom of the receiving shell and slides vertically into the receiving shell. The upper end of the cleaning tube has a nozzle for spraying cleaning liquid. The first linear actuator is positioned below the cleaning tube and is used to drive the cleaning tube to move.

[0007] Preferably, the upper part of the receiving shell is flared.

[0008] Preferably, a second water inlet for inlet and outlet is provided at the bottom of the receiving shell, the receiving shell can store water for water bath heating of the distillation flask, a heating wire for heating the water source is provided on the outside of the receiving shell, and a temperature sensor for detecting the temperature of the water source is provided on the inside of the receiving shell.

[0009] Preferably, a through groove is provided on the receiving shell for the cleaning tube to pass through, and a first sealing ring is provided on the through groove, the inner ring of the first sealing ring being interference-fitted with the outer side of the cleaning tube.

[0010] Preferably, the cleaning unit also includes a collection box and an extension sleeve; The collection box is located below the receiving shell; The extension sleeve is vertically fixed on the collection box. The cleaning pipe passes through the inside of the extension sleeve. The outside of the extension sleeve and the inside of the collection box form a water storage tank. The water storage tank is used to store the water that leaks from the cleaning pipe and the through groove. The vertical projection of the lower end of the cleaning pipe covers the vertical projection of the extension sleeve.

[0011] Preferably, the distillation unit further includes a ring frame and a drive unit; The ring frame is set on the outside of the distillation flask, and the distillation flask and the first rotary drive are both set on the ring frame and can rotate synchronously with the ring frame; The drive unit is located on one side of the ring frame and is used to drive the ring frame to reciprocate.

[0012] Preferably, the distillation unit includes a rotary joint, a sealing sleeve, a second linear actuator, and an exhaust pipe; The rotary joint is tilted and positioned on one side of the distillation flask; The sealing sleeve is fixedly installed at the end of the rotary joint facing the distillation flask along the extension direction of the rotary joint, and the sealing sleeve can be inserted and mated with the opening of the distillation flask. The second linear actuator is located on one side of the rotary joint and is used to drive the rotary joint to move along the extension direction of the rotary joint. The exhaust pipe is located on the side of the rotary joint away from the distillation flask and is connected to the rotary joint.

[0013] Preferably, a limiting protrusion is provided around the opening, and a limiting groove is provided on the sealing sleeve, with the limiting protrusion and the limiting groove engaging in a locking fit.

[0014] Preferably, the distillation unit further includes a replenishment tube, a needle valve, and a third linear actuator; The replenishment tube passes through the rotary joint and the sealing sleeve in sequence along the extension direction of the rotary joint; The needle valve is located at the end of the replenishment tube; The third linear actuator is located at the tail of the replenishment tube and is used to drive the replenishment tube to move within the rotary joint along the extension direction of the sealing sleeve.

[0015] The present invention also relates to a low-temperature distillation extraction device for natural plant essential oils, including a pre-filtration device and a low-temperature distillation extraction device for natural plant essential oils.

[0016] The advantages of this invention compared to the prior art are: 1. This invention achieves automatic cleaning of the distillation flask by automatically rotating and switching between the distillation unit and the cleaning unit through a first rotary driver, combined with the automatic lifting and lowering cleaning action of the cleaning tube, the wastewater collection function of the receiving shell, and the alternating operation design of the two sets of distillation unit devices. The entire process requires no manual disassembly, cleaning, or reassembly of the distillation flask. Operators no longer need to perform tedious steps such as shutting down pipelines, venting steam, and installing leak checks; they only need to complete the basic start-up and shutdown and status monitoring of the equipment. This significantly reduces the workload of manual operation and also avoids problems such as seal failure and distillation malfunction caused by improper installation and operation.

[0017] 2. The reciprocating rotation structure of the distillation flask driven by the ring frame, combined with the constant-temperature water bath heating system and sealing structure of the receiving shell, effectively improves the extraction quality of natural plant essential oils and the stability of the distillation process. The reciprocating oscillation of the distillation flask driven by the ring frame prevents the premature deposition of inorganic salts, plant debris, and other residues inside the flask, reducing the possibility of impurities mixing into the essential oil vapor. The constant-temperature water bath heating system of the receiving shell uses a temperature sensor to precisely control the temperature, keeping the water bath temperature fluctuation within ±2 degrees Celsius, strictly maintaining a low-temperature distillation range of 40-70 degrees Celsius, maximizing the preservation of the heat-sensitive active ingredients of the essential oils. At the same time, the sealing structure of the receiving shell prevents leakage of the heating water source, ensuring the continuous stability of the heating temperature.

[0018] 3. Through the locking and retaining structure of the sealing sleeve and the linkage control design of the replenishment pipe in the distillation unit, combined with the alternating operation mechanism of the two sets of distillation units, the continuous operation efficiency of the equipment and the service life of the core components are effectively improved. The locking and retaining structure between the sealing sleeve and the opening of the distillation flask allows the sealing sleeve to rotate synchronously when the distillation flask swings back and forth, avoiding wear on the seals and extending the service life of the sealing components; the automatic extension and retraction control of the replenishment pipe can automatically replenish plant juice during distillation and automatically retract during cleaning. Combined with the seamless alternation of the two sets of distillation units, it ensures continuous distillation operation without interruption of production due to cleaning, and also avoids leakage of essential oil vapor, thereby improving the extraction and recovery rate of essential oil. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a low-temperature distillation extraction device for natural plant essential oils according to the present invention.

[0020] Figure 2 This is a three-dimensional schematic diagram of the distillation unit in a low-temperature distillation extraction apparatus for natural plant essential oils according to the present invention.

[0021] Figure 3 This is a partial cross-sectional three-dimensional schematic diagram of the distillation unit in a low-temperature distillation extraction apparatus for natural plant essential oils according to the present invention.

[0022] Figure 4 This is a three-dimensional schematic diagram of the distillation unit in a low-temperature distillation extraction apparatus for natural plant essential oils of the present invention, after the upper outer shell has been removed.

[0023] Figure 5 This is a front view of the distillation unit in a low-temperature distillation extraction apparatus for natural plant essential oils of the present invention, after the upper outer shell has been removed.

[0024] Figure 6 This invention relates to a low-temperature distillation extraction apparatus for natural plant essential oils. Figure 5 Schematic diagram of cross-section at point AA.

[0025] Figure 7 This is a cross-sectional three-dimensional schematic diagram of the distillation unit in a low-temperature distillation extraction device for natural plant essential oils of the present invention, after the upper outer shell has been removed.

[0026] Figure 8 This invention relates to a low-temperature distillation extraction apparatus for natural plant essential oils. Figure 7 A magnified view of a portion of point B in the middle.

[0027] Figure 9 This is a three-dimensional schematic diagram of the distillation unit and the distillation flask in a low-temperature distillation extraction device for natural plant essential oils according to the present invention.

[0028] Figure 10 This invention relates to a low-temperature distillation extraction apparatus for natural plant essential oils. Figure 9 A magnified view of a portion of point C.

[0029] Figure 11 This is a cross-sectional three-dimensional schematic diagram of the cleaning unit cleaning the distillation flask in a low-temperature distillation extraction device for natural plant essential oils according to the present invention.

[0030] The diagram is labeled as follows: 1. Distillation flask; 11. Opening; 12. Limiting protrusion; 2. Distillation unit; 21. Rotary joint; 22. Sealing sleeve; 221. Second sealing ring; 222. Limiting groove; 23. Second linear actuator; 24. Exhaust pipe; 25. Liquid replenishment pipe; 26. Needle valve; 27. Third linear actuator; 3. Cleaning unit; 31. Receiving shell; 311. First water inlet; 312. Second water inlet; 313. Heating wire; 314. First sealing ring; 32. Cleaning tube; 33. First linear actuator; 34. Collection box; 35. Extension sleeve; 4. First rotary actuator; 5. Ring frame; 51. Support roller; 6. Drive unit; 61. Second rotary actuator; 62. Rotating roller. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figure 1 - Figure 4 , Figure 6 and Figure 8 A low-temperature distillation extraction device for natural plant essential oils includes two sets of distillation units, each set of distillation units being equipped with a distillation flask 1 with an opening 11 and a distillation unit 2 located obliquely above the distillation flask 1. The distillation flask 1 has a spherical structure. The distillation unit also includes a cleaning unit 3 and a first rotary drive 4. The cleaning unit 3 is located directly below the distillation flask 1; The first rotary driver 4 is horizontally positioned on one side of the distillation flask 1 and is used to drive the distillation flask 1 to rotate. The opening 11 of the distillation flask 1 can face the distillation unit 2 and be connected to it, or face vertically downwards. The cleaning unit 3 includes a receiving housing 31, a cleaning tube 32, and a first linear actuator 33; The receiving shell 31 is vertically positioned directly below the distillation flask 1, and a first water inlet 311 for discharging wastewater is provided at the bottom of the receiving shell 31. The cleaning tube 32 extends vertically through the bottom of the receiving shell 31 and slides in a vertical direction with the receiving shell 31. The upper end of the cleaning tube 32 has a nozzle for spraying cleaning liquid. The first linear actuator 33 is disposed below the cleaning tube 32 and is used to drive the cleaning tube 32 to move.

[0033] During the continuous operation of low-temperature distillation, various complex residues inevitably accumulate at the bottom of distillation flask 1. The formation of these residues is directly related to the raw materials themselves and the characteristics of the distillation process. Among them, inorganic salts come from the mineral nutrients absorbed by the plant raw materials from the soil. During the distillation process, the water in the raw materials is continuously heated and vaporized, and the inorganic salts that cannot be volatilized with the steam will gradually precipitate and slowly settle at the bottom of the flask. Organic polymers are mostly products formed by the mild polymerization reaction of some essential oil components under long-term mild heating. Even after the plant raw materials are pretreated with equipment such as filter screens and filter cloths before distillation, some micron-sized plant fibers and broken cell fragments still pass through the filter medium and enter distillation flask 1 with the raw material liquid, eventually settling during the distillation process. In addition, there is a small amount of azeotropic residue, which is an azeotropic mixture formed by some essential oil components and trace impurities in the raw materials. It cannot be completely separated by conventional distillation and will continue to remain at the bottom of the flask.

[0034] While pre-filtration can intercept most large-volume plant impurities before distillation, it has almost no effect on inorganic salts dissolved in the feed liquid, organic polymers dynamically generated during distillation, and extremely small plant debris. Therefore, these residues accumulate with each distillation batch. If these residues are not cleaned regularly, they will, on the one hand, introduce essential oil products into subsequent distillations, reducing the purity and quality of the essential oils. On the other hand, the deposited residues will adhere to the bottom of the inner wall of distillation flask 1, disrupting the uniformity of heating and potentially causing localized overheating. This contradicts the original purpose of low-temperature distillation: protecting heat-sensitive components. Therefore, regular cleaning of distillation flask 1 is essential for maintaining the stability of the low-temperature distillation process.

[0035] To avoid interrupting the distillation process when cleaning distillation flask 1, existing technology employs a dual-flask alternating operation scheme: through connected pipelines and controllable switching valves, the two distillation flasks 1 can alternately enter the working state. When one distillation flask 1 needs cleaning, the other can immediately take over distillation, thus ensuring production continuity. However, this scheme does not solve the inherent complexity of the distillation flask 1 cleaning operation itself: during cleaning, operators must first close the corresponding pipeline valves of distillation flask 1, drain the residual liquid and vapor inside the flask, and then disassemble the fasteners securing distillation flask 1 one by one to remove it from the entire distillation apparatus; during cleaning, a residue-free special cleaning agent must be used for repeated rinsing to avoid the cleaning agent residue affecting the subsequent essential oil quality; after cleaning and reinstallation, not only must the interfaces of distillation flask 1 and the heating module and condenser pipeline be precisely aligned, but the seals must also be replaced or inspected. Tightening bolts, clips, and other components ensures a tight seal, and in some cases, negative pressure testing and soapy water leak detection are required to confirm the sealing effect. The entire process involves numerous steps and high requirements, which is not only time-consuming but also demands a high level of operator proficiency.

[0036] To avoid the aforementioned issues, this invention optimizes the existing low-temperature distillation apparatus for natural plant essential oils. It still employs two sets of distillation units working alternately to ensure continuous operation. Furthermore, by incorporating a distillation unit 2 and a cleaning unit 3, and allowing the distillation flask 1 to rotate between these units, the distillation flask 1 can automatically switch between distillation and self-cleaning modes as needed, eliminating the need for manual removal and reducing workload. The specific structure and operation of this invention are as follows: When the distillation flask 1 is in distillation mode, the opening 11 of the distillation flask 1 is tilted upwards. At this time, the opening 11 of the distillation flask 1 is connected to the distillation unit 2. The distillation unit 2 can both discharge the vaporized essential oil in the distillation flask 1 and quantitatively replenish the plant juice into the distillation flask 1 to ensure continuous distillation. The specific structure of the distillation unit 2 will be described below. When the distillation reaches the rated time, the distillation unit 2 separates from the distillation flask 1, and then the first rotary driver 4 is activated. The first rotary driver 4 is preferably a servo motor. The first rotary driver 4 drives the distillation flask 1 to rotate, and the opening 11 of the distillation flask 1 gradually rotates from tilted upwards to vertical downwards. At this time, the receiving shell 31 is located directly below the opening 11 of the distillation flask 1. Subsequently, the first linear actuator 33 starts and drives the cleaning tube 32 to rise. The upper end of the cleaning tube 32 is equipped with a nozzle. When the cleaning tube 32 rises to a specified height, the nozzle at the top of the cleaning tube 32 extends into the distillation flask 1 and sprays out the cleaning liquid. The cleaning liquid can be a cleaning agent or water. It is worth noting that if a cleaning agent is used, the nozzle still needs to be rinsed with water at the end. The different liquids sprayed by the nozzle can be achieved through a reversing valve, which is existing technology and will not be described in detail here.

[0037] The sprayed cleaning liquid rinses the inner wall of the distillation flask 1. The rinsed wastewater is discharged through the opening 11 of the distillation flask 1 and falls into the receiving shell 31. At this time, the first water inlet 311 opens, and the wastewater is discharged from the first water inlet 311. After cleaning is completed, the first linear actuator 33 drives the cleaning tube 32 to descend, and the upper end of the cleaning tube 32 is withdrawn from the distillation flask 1. Then, the first rotary actuator 4 drives the distillation flask 1 to rotate back to its original position. When the opening 11 of the distillation flask 1 faces the distillation unit 2 again, the distillation unit 2 is connected to the opening 11 of the distillation flask 1, and the distillation operation begins.

[0038] In addition, compared with the traditional distillation flask 1, the distillation in this invention adopts a spherical structure, which makes the distillation flask 1 require less space to move when rotating, and maximizes the internal capacity of the distillation flask 1.

[0039] Reference Figure 5 and Figure 6 The upper part of the receiving shell 31 is flared.

[0040] By setting the upper part of the receiving shell 31 as a flared structure, it is ensured that when the distillation flask 1 is rotated from the distillation unit 2 to the upper part of the receiving shell 31, the liquid remaining in the distillation flask 1 will not spill onto the outside of the receiving shell 31.

[0041] Reference Figure 6 - Figure 8 A second water inlet 312 for water inlet and outlet is provided at the bottom of the receiving shell 31. The receiving shell 31 can store water for water bath heating of the distillation flask 1. A heating wire 313 for heating the water is provided on the outside of the receiving shell 31. A temperature sensor for detecting the temperature of the water is provided on the inside of the receiving shell 31.

[0042] Because the receiving shell 31 is located below the distillation flask 1, both water heating and flame heating of the distillation flask 1 will be obstructed by the receiving shell 31. The receiving shell 31 itself has the function of collecting water, therefore, the receiving shell 31 in this invention can be used both for collecting wastewater during the cleaning unit 3's cleaning of the distillation flask 1 and for water bath heating of the distillation flask 1. During heating, the first water inlet 311 is always closed, and the second water inlet 312 is open, introducing a fixed amount of external water into the receiving shell 31. Subsequently, the heating wire 313 heats the water stored in the receiving shell 31. Simultaneously, a temperature sensor detects the temperature of the water source. When the water source temperature reaches the preset water bath temperature, the heating wire 313 stops heating. The preset water bath temperature is a range threshold, not a fixed value, therefore the water bath temperature will fluctuate to some extent, with the fluctuation controlled within ±2 degrees Celsius.

[0043] When the distillation flask 1 needs cleaning, no new plant juice is injected into it. After a period of time, the residual liquid in the distillation flask 1 decreases. During this process, the second water inlet 312 opens to drain the water from the receiving shell 31. The drained water can be temporarily stored in a container for subsequent reuse. When all the water stored in the receiving shell 31 is drained, the second water inlet 312 closes and the first water inlet 311 opens. Driven by the first rotary driver 4, the opening 11 of the distillation flask 1 rotates from the distillation unit 2 to above the receiving shell 31. The cleaning unit 3 begins cleaning. Driven by the first linear driver 33, the cleaning tube 32 extends into the distillation flask 1 from the opening 11. Then, the nozzle at the upper end of the cleaning tube 32 sprays out cleaning liquid, which rinses the inner wall of the distillation flask 1. The rinsed wastewater falls from the opening 11 of the distillation flask 1 into the receiving shell 31 and is discharged from the first water inlet 311.

[0044] Reference Figure 8 A through groove is provided on the receiving shell 31 for the cleaning tube 32 to pass through, and a first sealing ring 314 is provided on the through groove. The inner ring of the first sealing ring 314 is interference-fitted with the outer side of the cleaning tube 32.

[0045] Because the receiving shell 31 needs to store water, and the cleaning tube 32 penetrates the bottom of the receiving shell 31, when the receiving shell 31 is used for water bath heating of the distillation flask 1, the water stored in the receiving shell 31 will leak out from the gap between the cleaning tube 32 and the through groove. This means that the receiving shell 31 needs to continuously replenish the heating water when heating the distillation flask 1, resulting in large fluctuations in water temperature. To avoid this situation, a first sealing ring 314 is installed on the through groove. To improve the sealing performance, multiple first sealing rings 314 can be installed on the through groove along its extension direction as needed. Through multi-layer sealing, the leakage rate between the cleaning tube 32 and the through groove is reduced, thereby ensuring that the water temperature fluctuation in the receiving shell 31 is relatively smooth, and ensuring the distillation extraction effect of natural plant essential oils.

[0046] Reference Figure 6 , Figure 7 and Figure 11 The cleaning unit 3 also includes a collection box 34 and an extension sleeve 35; The collection box 34 is located below the receiving shell 31; The extension sleeve 35 is vertically fixed on the collection box 34. The cleaning pipe 32 passes through the inside of the extension sleeve 35. The outside of the extension sleeve 35 and the inside of the collection box 34 form a water storage tank. The water storage tank is used to store the water leaking from the cleaning pipe 32 and the through groove. The vertical projection of the lower end of the cleaning pipe 32 covers the vertical projection of the extension sleeve 35.

[0047] Even with the first sealing ring 314 installed on the through groove, some water will still leak from between the through groove and the cleaning pipe 32. Therefore, a collection box 34 needs to be installed at the bottom of the receiving shell 31, and an extension sleeve 35 needs to be installed at the bottom of the receiving shell 31, so that the vertical projection of the lower end of the cleaning pipe 32 covers the vertical projection of the extension sleeve 35. This ensures that the water leaking from the cleaning pipe 32 and the through groove will be blocked by the lower end of the cleaning pipe 32 and eventually fall into the water storage tank, thus preventing water from leaking to the outside.

[0048] Reference Figure 3 , Figure 4 , Figure 9 and Figure 11 The distillation unit also includes a ring frame 5 and a drive unit 6; The ring frame 5 is set on the outside of the distillation flask 1. The distillation flask 1 and the first rotary driver 4 are both set on the ring frame 5 and can rotate synchronously with the ring frame 5. The drive unit 6 is located on one side of the ring frame 5 and is used to drive the ring frame 5 to reciprocate.

[0049] When the distillation flask 1 is connected to the distillation unit 2, the opening 11 of the distillation flask 1 is tilted upwards. The opening 11 of the distillation flask 1 has a circular structure. At this time, the ring frame 5 is coaxial with the opening 11, and the drive unit 6 drives the ring frame 5 to swing back and forth. Since the distillation flask 1 is located inside the ring frame 5, and a receiving shell 31 is provided below the distillation flask 1, the ring frame 5 cannot rotate 360 ​​degrees, but swings back and forth. Through the back and forth rotation of the distillation flask 1, the impurities precipitated in the distillation flask 1 are prevented from forming at the bottom, thus improving the quality of the plant essential oil.

[0050] The drive unit 6 includes a second rotary driver 61 and a rotating roller 62. The second rotary driver 61 is disposed on one side of the annular frame 5, and the rotating roller 62 is fixedly disposed on the output end of the second rotary driver 61. The rotating roller 62 rolls in engagement with the outer ring of the annular frame 5. Since the annular frame 5 is inclined, multiple support rollers 51 are also disposed on the lower side of the annular frame 5, and all support rollers 51 roll in engagement with the annular frame 5. The second rotary driver 61 drives the annular frame 5 to reciprocate through the rotating roller 62, thereby driving the reciprocating rotation of the distillation flask 1.

[0051] Reference Figure 6 , Figure 7 , Figure 10 and Figure 11 Distillation unit 2 includes a rotary joint 21, a sealing sleeve 22, a second linear actuator 23, and an exhaust pipe 24; The rotary joint 21 is tilted and positioned on one side of the distillation flask 1; The sealing sleeve 22 is fixedly disposed at the end of the rotary joint 21 facing the distillation flask 1 along the extension direction of the rotary joint 21, and the sealing sleeve 22 can be inserted and engaged with the opening 11 of the distillation flask 1. The second linear actuator 23 is disposed on one side of the rotary joint 21, and the second linear actuator 23 is used to drive the rotary joint 21 to move along the extension direction of the rotary joint 21. The exhaust pipe 24 is located on the side of the rotary joint 21 away from the distillation flask 1 and is connected to the rotary joint 21.

[0052] Multiple second sealing rings 221 are provided around the sealing sleeve 22. The multiple second sealing rings 221 are arranged on the outside of the sealing sleeve 22 along the extension direction of the sealing sleeve 22, which improves the sealing performance between the sealing sleeve 22 and the opening 11 after the sealing sleeve 22 is inserted into the opening 11.

[0053] When the distillation flask 1 needs cleaning, the second linear actuator 23 drives the sealing sleeve 22 to retract from the opening 11 via the rotary joint 21, and then the distillation flask 1 rotates normally. After cleaning is completed, when the distillation flask 1 rotates back to its original position under the drive of the first rotary actuator 4, that is, when the opening 11 of the distillation flask 1 faces the sealing sleeve 22, the second linear actuator 23 drives the rotary joint 21 and the sealing sleeve 22 to move synchronously, so that the sealing sleeve 22 is inserted into the opening 11 of the distillation flask 1, and a seal is achieved through the second sealing ring 221.

[0054] Reference Figure 10 A limiting protrusion 12 is provided around the opening 11, and a limiting groove 222 is provided on the sealing sleeve 22. The limiting protrusion 12 and the limiting groove 222 are engaged and matched.

[0055] By engaging the limiting protrusion 12 with the limiting groove 222, when the ring frame 5 drives the distillation flask 1 to rotate, the sealing sleeve 22 can rotate synchronously with the distillation flask 1, and the second sealing ring 221 fitted on the sealing sleeve 22 will not be damaged, thus extending the service life of the second sealing ring 221.

[0056] Reference Figure 6 , Figure 7 and Figure 11 Distillation unit 2 also includes a replenishment tube 25, a needle valve 26, and a third linear actuator 27; The replenishment tube 25 passes through the rotary joint 21 and the sealing sleeve 22 in sequence along the extension direction of the rotary joint 21; The needle valve 26 is located at the tail end of the replenishment tube 25; The third linear actuator 27 is located at the tail of the replenishment tube 25 and is used to drive the replenishment tube 25 to move within the rotary joint 21 along the extension direction of the sealing sleeve 22.

[0057] By setting up a replenishment tube 25 and a needle valve 26 at the end of the replenishment tube 25, a fixed amount of plant juice is continuously added to the distillation flask 1, thereby enabling continuous distillation of the distillation flask 1. When replenishing the distillation flask 1, the replenishment tube 25 extends into the distillation flask 1. When cleaning is required, the third linear actuator 27 drives the replenishment tube 25 to withdraw from the distillation flask 1.

[0058] Reference Figure 1 - Figure 11 The present invention also relates to a low-temperature distillation extraction device for natural plant essential oils, including a pre-filtration device and a low-temperature distillation extraction device for natural plant essential oils.

[0059] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A low-temperature distillation extraction device for natural plant essential oils, comprising two sets of distillation units, each set of distillation units being provided with a distillation flask (1) with an opening (11) and a distillation unit (2) located obliquely above the distillation flask (1). Its features are, The distillation flask (1) has a spherical structure. The distillation unit also includes a cleaning unit (3) and a first rotary drive (4). The cleaning unit (3) is located directly below the distillation flask (1); The first rotary actuator (4) is horizontally positioned on one side of the distillation flask (1) and is used to drive the distillation flask (1) to rotate. The opening (11) of the distillation flask (1) can face the distillation unit (2) and be connected to it or face vertically downward. The cleaning unit (3) includes a receiving shell (31), a cleaning tube (32) and a first linear actuator (33); The receiving shell (31) is vertically positioned directly below the distillation flask (1), and a first water inlet (311) for discharging wastewater is provided at the bottom of the receiving shell (31). The cleaning tube (32) extends vertically through the bottom of the receiving shell (31) and slides in a vertical direction with the receiving shell (31). The upper end of the cleaning tube (32) has a nozzle for spraying cleaning liquid. The first linear actuator (33) is positioned below the cleaning tube (32) and is used to drive the cleaning tube (32) to move.

2. The low-temperature distillation extraction apparatus for natural plant essential oils according to claim 1, characterized in that, The upper part of the receiving shell (31) is flared.

3. The low-temperature distillation extraction apparatus for natural plant essential oils according to claim 1, characterized in that, A second water inlet (312) for water inlet and outlet is provided at the bottom of the receiving shell (31). The receiving shell (31) can store water for water bath heating of the distillation flask (1). A heating wire (313) for heating the water is provided on the outside of the receiving shell (31). A temperature sensor for detecting the temperature of the water is provided on the inside of the receiving shell (31).

4. The low-temperature distillation extraction apparatus for natural plant essential oils according to claim 3, characterized in that, A through groove is provided on the receiving shell (31) for the cleaning tube (32) to pass through, and a first sealing ring (314) is provided on the through groove. The inner ring of the first sealing ring (314) is interference-fitted with the outer side of the cleaning tube (32).

5. The low-temperature distillation extraction apparatus for natural plant essential oils according to claim 4, characterized in that, The cleaning unit (3) also includes a collection box (34) and an extension sleeve (35); The collection box (34) is located below the receiving shell (31); The extension sleeve (35) is vertically fixed on the collection box (34). The cleaning pipe (32) passes through the inside of the extension sleeve (35). The outside of the extension sleeve (35) and the inside of the collection box (34) form a water storage tank. The water storage tank is used to store the water leaking from the cleaning pipe (32) and the through groove. The vertical projection of the lower end of the cleaning pipe (32) covers the vertical projection of the extension sleeve (35).

6. The low-temperature distillation extraction apparatus for natural plant essential oils according to claim 3, characterized in that, The distillation unit also includes a ring frame (5) and a drive unit (6). The ring frame (5) is set on the outside of the distillation flask (1). The distillation flask (1) and the first rotary drive (4) are both set on the ring frame (5) and can rotate synchronously with the ring frame (5). The drive unit (6) is located on one side of the ring frame (5) and is used to drive the ring frame (5) to rotate back and forth.

7. The low-temperature distillation extraction apparatus for natural plant essential oils according to claim 1, characterized in that, The distillation unit (2) includes a rotary joint (21), a sealing sleeve (22), a second linear actuator (23), and an exhaust pipe (24). The rotary joint (21) is tilted and set on one side of the distillation flask (1); The sealing sleeve (22) is fixedly installed at the end of the rotary joint (21) facing the distillation flask (1) along the extension direction of the rotary joint (21), and the sealing sleeve (22) can be inserted and matched with the opening (11) of the distillation flask (1); The second linear actuator (23) is disposed on one side of the rotary joint (21), and the second linear actuator (23) is used to drive the rotary joint (21) to move along the extension direction of the rotary joint (21); The exhaust pipe (24) is located on the side of the rotary joint (21) away from the distillation flask (1) and is connected to the rotary joint (21).

8. The low-temperature distillation extraction apparatus for natural plant essential oils according to claim 7, characterized in that, A limiting protrusion (12) is provided around the opening (11), and a limiting groove (222) is provided on the sealing sleeve (22). The limiting protrusion (12) and the limiting groove (222) are engaged.

9. The low-temperature distillation extraction apparatus for natural plant essential oils according to claim 7, characterized in that, The distillation unit (2) also includes a replenishment tube (25), a needle valve (26), and a third linear actuator (27); The replenishment tube (25) passes through the rotary joint (21) and the sealing sleeve (22) in sequence along the extension direction of the rotary joint (21). A needle valve (26) is located at the end of the replenishment tube (25); The third linear actuator (27) is located at the tail of the replenishment tube (25) and is used to drive the replenishment tube (25) to move within the rotary joint (21) along the extension direction of the sealing sleeve (22).

10. A low-temperature distillation extraction device for natural plant essential oils, characterized in that, It includes a pre-filtration device and a low-temperature distillation extraction device for natural plant essential oils as described in any one of claims 1-9.

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