Essential oil extraction process

Abstract

The invention belongs to the technical field of essential oil extraction, and particularly discloses an essential oil extraction process which comprises the following steps: S1, cleaning collected mint, cutting the cleaned mint into sections, and airing the mint sections; s2, a mixed solution of ethyl acetate and ethyl alcohol is added into a distiller, the mint sections prepared in the step S1 are placed into the distiller, the solid-to-liquid ratio reaches 1: 2, the distiller is heated, ethyl acetate is removed firstly, volatile matter in the distiller flows into a separating funnel to be extracted after being cooled through a condensation pipe, and the volatile matter in the distiller flows into a vacuum pump to be separated; separating the ethanol from the peppermint essential oil in the separating funnel to obtain crude peppermint essential oil; s3, distilling and extracting the crude extraction peppermint essential oil prepared in the step S2 for multiple times to obtain the peppermint essential oil. The extrusion part moves downwards through pulling of the elastic part, at the moment, the twisting force of the torsional spring enables the pressing plate and the connecting frame to extrude the mint section, and the mint section is completely located in the mixed liquid.

Description

Technical Field

[0001] The invention belongs to the technical field of essential oil extraction, and particularly relates to an essential oil extraction process. Background Art

[0002] Essential oils are substances with high concentrations of aroma and volatility that are extracted from the leaves, flowers, seeds, fruits, roots, bark, resin, wood core and other parts of plants by steam distillation, cold pressing, fat absorption and solvent extraction.

[0003] After the plants are placed inside the distiller, they will float on the water surface during the distillation process, preventing the plants from fully contacting the water, and thus making it impossible to extract all of the essential oils in the plants.

[0004] Therefore, it is necessary to invent a kind of essential oil extraction process to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides an essential oil extraction process to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A process for extracting essential oils comprises the following steps:

[0008] S1, washing the collected mint, cutting the washed mint into sections, and drying the cut mint;

[0009] S2, adding a mixed solution of ethyl acetate and ethanol into a distiller, placing the mint segment prepared in step S1 in a distiller so that the solid-liquid ratio reaches 1:2, heating the distiller, first removing the ethyl acetate, and cooling the volatiles in the distiller through a condenser tube and then flowing into a separating funnel for extraction, separating ethanol and mint essential oil inside the separating funnel to obtain a crude mint essential oil;

[0010] S3, subjecting the crude peppermint essential oil prepared in step S2 to multiple distillation extractions to obtain peppermint essential oil.

[0011] Furthermore, the distiller includes a shell and a cover plate at the top opening of the shell, an exhaust pipe is arranged at the center of the top surface of the cover plate, and the top end of the exhaust pipe is connected to the input end of the condenser, a limiting component for limiting the cover plate is arranged on the outer side surface of the circumference of the shell, an inner ring strip is arranged inside the shell, a filter plate is placed on the top of the inner ring strip, and a mint segment is placed on the top of the filter plate, a plurality of protruding rods penetrating the inner ring strip are fixed to the bottom surface of the filter plate, a plurality of through holes are arranged on the surface of the inner ring strip, and the plurality of protruding rods correspond to the plurality of through holes one by one, a plurality of brackets are fixed to the top surface of the filter plate, an extrusion component for pressing the mint segment is arranged on the surface of the bracket, and the extrusion component cooperates with the filter plate to pressurize the mint segment.

[0012] Furthermore, a plurality of side panels are fixed to the outer circumferential surface of the shell, and the limiting component includes a plurality of rotating frames, the bottom end of the rotating frame is rotatably clamped on the top end of the side panel, the top end of the rotating frame is sleeved with an elastic sleeve, the top surface of the cover plate is provided with an annular groove, and the elastic sleeve on the top of the rotating frame is fitted and buckled inside the annular groove of the cover plate.

[0013] Furthermore, two opposite arc-shaped plates are arranged at the bottom of the through hole of the inner ring strip, the outer side surface of the circumference of the convex rod is fitted with the inner concave surface of the arc-shaped plate, and a bottom plate passing through the two arc-shaped plates is arranged at the bottom of the convex rod, an outer rod is arranged on the outer side of the arc-shaped plate, and the bottom end of the outer rod passes through the bottom end of the bottom plate, a nut is spirally sleeved on the bottom end of the outer rod, and a spring is sleeved on the surface of the outer rod, the top end of the spring is connected to the bottom surface of the inner ring strip, and the bottom end of the spring is connected to the top surface of the bottom plate.

[0014] Furthermore, the extrusion component includes a movable plate, the outer end of the movable plate is embedded in the inner side of the bracket, a vertical rod is embedded in the inside of the bracket, the outer end of the movable plate is sleeved on the surface of the vertical rod, an elastic member is sleeved on the surface of the vertical rod, the top end of the elastic member is connected to the bottom surface of the movable plate, and the bottom end of the elastic member is connected to the top surface of the filter plate. The elastic force of the elastic member enables the movable plate to drive the extrusion component to squeeze the mint segment on the top surface of the filter plate.

[0015] Furthermore, cross bars are fixed on both sides of the movable plate, a rotating frame is sleeved on the outer end of the cross bar, a circular plate is fixed on the outer end of the cross bar, a torsion spring is sleeved on the surface of the cross bar, the inner side of the rotating rotating frame is connected to the circular plate by the torsion spring, a pressure plate is fixed on the outer side of the rotating frame, and the twisting force of the torsion spring enables the rotating frame to squeeze the mint segment by the pressure plate.

[0016] Furthermore, the extrusion component also includes a plurality of connecting frames, two adjacent pressure plates are connected by means of the connecting frames, and the pressure plates extrude the mint segments by means of the connecting frames, the connecting frames include two side frames, the side frames include a first pressure strip and a second pressure strip, the first pressure strip and the second pressure strip are fixedly connected by means of a connecting rod, and a sliding groove corresponding to the connecting rod is provided on the surface of the pressure plate.

[0017] Furthermore, a pull rod passing through the second pressure strip is fixed to the end surface of the first pressure strip, a sliding rod is fixed to the end of the pull rod, a limiting groove corresponding to the sliding rod is provided on the surface of the second pressure strip, and the surface of the sliding rod is connected to the inner end of the limiting groove by a spring sheet.

[0018] Technical effects and advantages of the present invention:

[0019] 1. The present invention causes the extrusion component to move downward by pulling the elastic member, and at this time the twisting force of the torsion spring causes the pressing plate and the connecting frame to squeeze the mint segment, so that the mint segment is completely immersed in the mixed liquid.

[0020] 2. The present invention pushes the connecting frame to move horizontally. The horizontally moving connecting frame slides inside the slide groove using the connecting rod to move the connecting frame to the raised part of the mint segment. At this time, the elastic force of the spring sheet squeezes the pressure of the connecting frame to squeeze the raised part of the mint segment, so that part of the mint segment floats on the top of the mixed liquid.

[0021] 3. The present invention enables the filter plate to move downward by the accumulation of mint segments, and the filter plate utilizes the convex rod to make the bottom plate pull the spring, and utilizes the elastic force of the spring to absorb the impact force of the mint segments on the filter plate, thereby preventing the impact force from causing collision damage between the bottom surface of the filter plate and the inner ring strip; and a plurality of through holes cooperate with a plurality of convex rods to limit the filter plate, and the elastic force of the spring supports the convex rod through the bottom plate, so that the filter plate is horizontally located inside the shell, thereby preventing the mint segments from entering the bottom of the inner ring strip due to the tilt of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 1 is an overall schematic diagram of a distiller used in an essential oil extraction process according to an embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of a filter plate inside a housing according to an embodiment of the present invention placed on top of an inner ring strip;

[0024] Figure 3 is an overall schematic diagram of a housing according to an embodiment of the present invention;

[0025] Figure 4 The embodiment of the present invention Figure 2 A magnified view of the structure of part A;

[0026] Figure 5 is a schematic diagram of internal components of a housing according to an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of an extrusion component on a bracket according to an embodiment of the present invention;

[0028] Figure 7 It is a schematic diagram of a rotating frame sleeved on the surface of a crossbar according to an embodiment of the present invention;

[0029] Figure 8 is an overall schematic diagram of a connecting frame according to an embodiment of the present invention;

[0030] In the figure: 1, shell; 2, cover plate; 3, exhaust pipe; 4, inner ring strip; 5, filter plate; 6, convex rod; 7, through hole; 8, bracket; 9, side plate; 10, rotating frame; 11, elastic sleeve; 12, arc plate; 13, bottom plate; 14, outer rod; 15, nut; 16, spring; 17, movable plate; 18, vertical rod; 19, elastic member; 20, cross bar; 21, rotating frame; 22, torsion spring; 23, pressure plate; 24, first pressure strip; 25, second pressure strip; 26, slide groove; 27, pull rod; 28, slide rod; 29, spring piece. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0032] Example 1: The present invention provides an essential oil extraction process, comprising the following steps: S1. Wash the collected mint, cut the washed mint into segments, and dry the segmented mint. S2. Add a mixed solution of ethyl acetate and ethanol into a distiller, place the mint segments prepared in step S1 in the distiller so that the solid-liquid ratio reaches 1:2, heat the distiller, remove ethyl acetate first, cool the volatiles in the distiller through a condenser and then flow into a separating funnel for extraction, separate ethanol and mint essential oil inside the separating funnel to obtain crude mint essential oil. S3. Extract the crude mint essential oil prepared in step S2 through multiple distillations to obtain mint essential oil.

[0033] Embodiment 2:

[0034] exist Figures 1 to 5The distiller comprises a shell 1, a heating device for heating the mixed liquid is arranged on the surface of the shell 1, and a cover plate 2 is located at the top opening of the shell 1, an exhaust pipe 3 is arranged at the center of the top surface of the cover plate 2, and the top end of the exhaust pipe 3 is connected to the input end of the condenser, a limiting component for limiting the cover plate 2 is arranged on the outer side of the circumference of the shell 1, an inner ring strip 4 is arranged inside the shell 1, a filter plate 5 is placed on the top of the inner ring strip 4, and the mint segment is placed on the top of the filter plate 5, a plurality of protruding rods 6 penetrating the inner ring strip 4 are fixed to the bottom surface of the filter plate 5, a plurality of through holes 7 are arranged on the surface of the inner ring strip 4, and the plurality of protruding rods 6 correspond to the plurality of through holes 7 one by one, a plurality of brackets 8 are fixed to the top surface of the filter plate 5, a pressing component for pressing the mint segment is arranged on the surface of the bracket 8, and the pressing component cooperates with the filter plate 5 to pressurize the mint segment. Add the mixture of ethyl acetate and ethanol into the shell 1, place the filter plate 5 on the top of the inner ring strip 4, pull open the extrusion component, put the mint segment into the shell 1, and the mint segment gradually accumulates on the top of the filter plate 5. Loosen the extrusion component, and the extrusion components on the multiple brackets 8 cooperate with each other to squeeze the mint segment on the top of the filter plate 5. The mint segment is fully in the mixed liquid by extrusion, ensuring that the mint segment is fully in contact with the mixed liquid. Cover plate 2 is placed on the top opening of the shell 1, and the cover plate 2 is defined by the limiting component. At this time, the opening at the top of the shell 1 is in a sealed state, and the heating device inside the shell 1 is working to heat the mixed liquid inside the shell 1. At this time, the volatiles carrying the mint essential oil enter the condenser through the exhaust pipe 3 to complete the preliminary extraction of the essential oil.

[0035] exist Figure 1 In the embodiment, a plurality of side plates 9 are fixed to the outer circumferential side of the shell 1, and the limiting component includes a plurality of rotating frames 10, the bottom end of the rotating frame 10 is rotated and clamped on the top of the side plate 9, and the top end of the rotating frame 10 is sleeved with an elastic sleeve 11, and the top surface of the cover plate 2 is provided with an annular groove, and the elastic sleeve 11 on the top of the rotating frame 10 is matched and buckled inside the annular groove of the cover plate 2. The cover plate 2 is placed at the top opening of the shell 1, and the rotating frame 10 is rotated, and the bottom end of the rotating frame 10 rotates on the top of the side plate 9, and the rotating rotating frame 10 drives the elastic sleeve 11 to approach the cover plate 2 until the outer circumferential side of the elastic sleeve 11 contacts, and the rotating frame 10 is continuously rotated, and the elastic sleeve 11 presses the cover plate 2 during the rotation of the rotating frame 10 until the deformed elastic sleeve 11 is buckled inside the annular groove on the top surface of the cover plate 2, and the cover plate 2 is annularly limited by using a plurality of rotating frames 10, and the sealing process between the cover plate 2 and the shell 1 is completed, so as to prevent the volatiles inside the shell 1 from being discharged into the outside air through the gap between the shell 1 and the cover plate 2.

[0036] exist Figures 2 to 4In the embodiment, two opposite arc plates 12 are arranged at the bottom of the through hole 7 of the inner ring strip 4, the outer side surface of the circumference of the convex rod 6 is fitted with the inner concave surface of the arc plate 12, and a bottom plate 13 penetrating the two arc plates 12 is arranged at the bottom of the convex rod 6, an outer rod 14 is arranged on the outer side of the arc plate 12, and the bottom end of the outer rod 14 penetrates the bottom end of the bottom plate 13, a nut 15 is spirally sleeved on the bottom end of the outer rod 14, and a spring 16 is sleeved on the surface of the outer rod 14, the top end of the spring 16 is connected to the bottom surface of the inner ring strip 4, and the bottom end of the spring 16 is connected to the top surface of the bottom plate 13. After the protruding rods 6 of the filter plate 5 are aligned with the through holes 7, the filter plate 5 is placed on the top of the inner ring strip 4. At this time, the protruding rods 6 are correspondingly inserted into the surfaces of the through holes 7, and the bottom ends of the protruding rods 6 are attached to the top surface of the bottom plate 13. The multiple through holes 7 and the multiple protruding rods 6 cooperate to limit the filter plate 5, and the elastic force of the springs 16 supports the protruding rods 6 through the bottom plate 13, so that the filter plate 5 is horizontally located inside the shell 1, thereby preventing the filter plate 5 from tilting and causing the mint segments to enter the bottom of the inner ring strip 4.

[0037] After the filter plate 5 is placed, the mint segments are poured into the shell 1. After the mint segments are gradually accumulated on the top of the filter plate 5, the weight of the mint segments causes the filter plate 5 to move downward. The downwardly moved filter plate 5 uses the convex rod 6 to make the bottom plate 13 move downward on the surface of the outer rod 14. The two outer rods 14 respectively limit the two ends of the bottom plate 13, so that the bottom plate 13 moves downward smoothly, and the downwardly moved bottom plate 13 cooperates with the spring 16 pulling the surface of the outer rod 14, and uses the elastic force of the spring 16 to absorb the impact force of the mint segments on the filter plate 5, thereby avoiding the impact force causing collision damage between the bottom surface of the filter plate 5 and the inner ring strip 4.

[0038] By twisting the nut 15, the nut 15 moves up and down on the surface of the outer rod 14. At this time, the distance between the nut 15 and the inner ring strip 4 gradually decreases or increases. After the downwardly moved nut 15 gradually moves away from the inner ring strip 4, the filter plate 5 makes the bottom plate 13 move downward on the surface of the outer rod 14 through the protruding rod 6. At this time, the distance between the nut 15 and the inner ring strip 4 is the distance that the bottom plate 13 moves downward, which makes it convenient to place an appropriate amount of mint segments on the top of the filter plate 5 according to the elastic force of the spring 16 to avoid too many mint segments.

[0039] exist Figures 5 to 7In the embodiment, the extrusion component includes a movable plate 17, the outer end of the movable plate 17 is embedded in the inner side of the bracket 8, a vertical rod 18 is embedded inside the bracket 8, the outer end of the movable plate 17 is sleeved on the surface of the vertical rod 18, an elastic member 19 is sleeved on the surface of the vertical rod 18, the top of the elastic member 19 is connected to the bottom surface of the movable plate 17, and the bottom of the elastic member 19 is connected to the top surface of the filter plate 5. The elastic force of the elastic member 19 enables the movable plate 17 to drive the extrusion component to squeeze the mint segment on the top surface of the filter plate 5. Pull the movable plate 17 upward, the upward movable plate 17 moves upward on the surface of the vertical rod 18 of the bracket 8, and the upward movable plate 17 cooperates with the elastic member 19 inside the bracket 8 to pull until the movable plate 17 is at the top of the vertical rod 18. After the mint segment is accumulated on the top of the filter plate 5, the movable plate 17 is released, and the elastic force of the elastic member 19 pulls the movable plate 17 downward, and the downward movable plate 17 drives the extrusion component to squeeze on the top of the mint segment. By using the pressing of the extrusion component, the mint segment is fully in the mixed liquid.

[0040] exist Figure 6 and Figure 7 In the figure, cross bars 20 are fixed on both sides of the movable plate 17, a rotating frame 21 is sleeved on the outer end of the cross bar 20, a circular plate is fixed on the outer end of the cross bar 20, a torsion spring 22 is sleeved on the surface of the cross bar 20, the inner side of the rotating rotating frame 21 is connected to the circular plate by the torsion spring 22, a pressure plate 23 is fixed on the outer side of the circumference of the rotating frame 21, and the twisting force of the torsion spring 22 enables the rotating frame 21 to squeeze the mint segment by the pressure plate 23. After the movable plate 17 is pulled to the top of the vertical rod 18, the inner end of the pressing plate 23 is pulled upward. Since the movable plate 17 uses the cross bar 20 to limit the rotating frame 21 at the outer end of the pressing plate 23, the pressing plate 23 rotates on the surface of the cross bar 20 using the rotating frame 21 during the pulling process. The rotating rotating frame 21 twists the torsion spring 22 on the surface of the cross bar 20 until the pressing plate 23 is in a vertical state, and the mint segments are piled on the top surface of the filter plate 5. The movable plate 17 is released, and the elastic force of the elastic member 19 causes the movable plate 17 to move downward to squeeze the mint segments. The pressing plate 23 is released, and the twisting force of the torsion spring 22 causes the pressing plate 23 to rotate in the opposite direction through the rotating frame 21. The pressing plate 23 rotating in the opposite direction cooperates to press on the top of the mint segments. Multiple pressing plates 23 are used to press to prevent the mint segments from floating on the top surface of the mixed liquid.

[0041] exist Figures 5 to 8In the embodiment, the extrusion component further includes a plurality of connecting frames, two adjacent pressing plates 23 are connected by the connecting frames, and the pressing plates 23 use the connecting frames to extrude the mint segments, the connecting frames include two side frames, the side frames include a first pressure strip 24 and a second pressure strip 25, the first pressure strip 24 and the second pressure strip 25 are fixedly connected by a connecting rod, and a sliding groove 26 corresponding to the connecting rod is provided on the surface of the pressing plate 23. A pull rod 27 penetrating the second pressure strip 25 is fixed on the end surface of the first pressure strip 24, a sliding rod 28 is fixed on the end of the pull rod 27, a limiting groove corresponding to the sliding rod 28 is provided on the surface of the second pressure strip 25, and the surface of the sliding rod 28 is connected to the inner side end of the limiting groove by a spring sheet 29. When the inner end of the pressure plate 23 is pulled up by the connecting frame, the connecting frame pulls the pressure plate 23 to rotate through the connecting rod. Since the two adjacent pressure plates 23 are connected by the connecting frame, the rotating pressure plate 23 pulls the side frame by the connecting rod. At this time, the two side frames of the connecting frame move away from each other. At this time, the first pressure strip 24 uses the pull rod 27 to pull the slide bar 28 to slide inside the limiting groove of the second pressure strip 25, and the moving slide bar 28 cooperates to squeeze the spring piece 29 inside the limiting groove. Through the sliding of the slide bar 28 and the elastic force of the spring piece 29, the two adjacent pressure plates 23 rotate at the same time, and the distance between the two adjacent pressure plates 23 gradually increases. After the mint segment is placed on the top of the filter plate 5, the connecting frame is released, and the elastic force of the spring piece 29 makes the first pressure strip 24 and the second pressure strip 25 approach each other, and the twisting force of the torsion spring 22 makes the pressure plate 23 drive the connecting frame to pressurize the mint part. Multiple pressure plates 23 cooperate with multiple connecting frames to limit the mint part to prevent the mint part from floating on the top of the mixed liquid.

[0042] After the pressing plate 23 is set horizontally, it pushes the connecting frame to move horizontally. The horizontally moving connecting frame slides inside the slide groove 26 using the connecting rod to move the connecting frame to the raised part of the mint segment. At this time, the elastic force of the spring 29 squeezes the pressure of the connecting frame to squeeze the raised part of the mint segment, so that part of the mint segment floats on the top of the mixed liquid.

[0043] Working principle of the present invention:

[0044] Reference Figures 1 to 8 As shown, after the protruding rods 6 of the filter plate 5 are aligned with the through holes 7, the filter plate 5 is placed on the top of the inner ring strip 4. At this time, the protruding rods 6 are correspondingly inserted into the surface of the through holes 7, and the bottom ends of the protruding rods 6 are attached to the top surface of the bottom plate 13. The multiple through holes 7 and the multiple protruding rods 6 cooperate to define the filter plate 5, and the elastic force of the spring 16 supports the protruding rods 6 through the bottom plate 13, so that the filter plate 5 is horizontally located inside the shell 1.

[0045] The movable plate 17 is pulled upward, and the movable plate 17 moves upward on the surface of the vertical rod 18 of the bracket 8. The movable plate 17 cooperates with the elastic member 19 on the inner side of the bracket 8 to pull until the movable plate 17 is at the top of the vertical rod 18. The inner side end of the pressing plate 23 is pulled upward. Since the movable plate 17 uses the cross bar 20 to limit the rotating frame 21 at the outer side end of the pressing plate 23, the pressing plate 23 rotates on the surface of the cross bar 20 using the rotating frame 21 during the pulling process, and the rotating rotating frame 21 twists the torsion spring 22 on the surface of the cross bar 20. The rotating pressing plate 23 uses the connecting rod to pull the side frame. At this time, the two side frames of the connecting frame are separated from each other. At this time, the first pressing strip 24 uses the pulling rod 27 to pull the sliding rod 28 to slide inside the limiting groove of the second pressing strip 25, and the moving sliding rod 28 cooperates to squeeze the spring 29 inside the limiting groove. Through the sliding of the sliding rod 28 and the elastic force of the spring 29, the two adjacent pressing plates 23 rotate at the same time, and the distance between the two adjacent pressing plates 23 gradually increases.

[0046] After the pressing plate 23 is in a vertical state, the mint segments are piled on the top surface of the filter plate 5, the movable plate 17 is loosened, and the elastic force of the elastic member 19 causes the movable plate 17 to move downward to squeeze the mint segments. The pressing plate 23 is loosened, and the twisting force of the torsion spring 22 causes the pressing plate 23 to rotate in the opposite direction through the rotating frame 21. The pressing plate 23 that rotates in the opposite direction cooperates to press on the top of the mint segments. The connecting frame is loosened, and the elastic force of the spring 29 causes the first pressure strip 24 and the second pressure strip 25 to approach each other, and the twisting force of the torsion spring 22 causes the pressing plate 23 to drive the connecting frame to press the mint portion. Multiple pressing plates 23 cooperate with multiple connecting frames to limit the mint portion to prevent the mint portion from floating on the top of the mixed liquid. After the pressing plate 23 is set horizontally, it pushes the connecting frame to move horizontally. The horizontally moving connecting frame uses the connecting rod to slide inside the slide 26 to move the connecting frame to the raised part of the mint segment. At this time, the elastic force of the spring 29 squeezes the pressure of the connecting frame to squeeze the raised part of the mint segment, so that part of the mint segment floats on the top of the mixed liquid.

[0047] After the mint segments gradually accumulate on the top of the filter plate 5, the weight of the mint segments causes the filter plate 5 to move downward, and the downwardly moved filter plate 5 uses the convex rod 6 to make the bottom plate 13 move downward on the surface of the outer rod 14. The two outer rods 14 respectively limit the two ends of the bottom plate 13, so that the bottom plate 13 moves downward smoothly, and the downwardly moved bottom plate 13 cooperates with the spring 16 pulling the surface of the outer rod 14, and uses the elastic force of the spring 16 to absorb the impact force of the mint segments on the filter plate 5, thereby avoiding the impact force causing collision damage between the bottom surface of the filter plate 5 and the inner ring strip 4.

[0048] The cover plate 2 is placed at the top opening of the shell 1, and the rotating frame 10 is rotated. The bottom end of the rotating frame 10 rotates at the top of the side plate 9. The rotating rotating frame 10 drives the elastic sleeve 11 close to the cover plate 2 until the outer circumferential side of the elastic sleeve 11 contacts. The rotating frame 10 is continued to be rotated. The elastic sleeve 11 squeezes the cover plate 2 during the rotation of the rotating frame 10 until the deformed elastic sleeve 11 is snapped into the annular groove on the top surface of the cover plate 2. The cover plate 2 is annularly limited by multiple rotating frames 10 to complete the sealing process between the cover plate 2 and the shell 1. The internal heating device of the shell 1 works to heat the mixed liquid inside the shell 1. At this time, the volatiles carrying the peppermint essential oil enter the condenser through the exhaust pipe 3 to complete the preliminary extraction of the essential oil.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A process for extracting essential oils, characterized in that: The following steps are involved: S1, washing the collected mint, cutting the washed mint into sections, and drying the cut mint; S2, adding a mixed solution of ethyl acetate and ethanol into a distiller, placing the mint segment prepared in step S1 in a distiller so that the solid-liquid ratio reaches 1:2, heating the distiller, first removing the ethyl acetate, and cooling the volatiles in the distiller through a condenser tube and then flowing into a separating funnel for extraction, separating ethanol and mint essential oil inside the separating funnel to obtain a crude mint essential oil; S3, subjecting the crude peppermint essential oil prepared in step S2 to multiple distillation extractions to obtain peppermint essential oil.

2. The essential oil extraction process according to claim 1, wherein: The distiller comprises a shell (1), and a cover plate (2) located at the top opening of the shell (1), an exhaust pipe (3) is arranged at the center of the top surface of the cover plate (2), and the top end of the exhaust pipe (3) is connected to the input end of the condenser, a limiting component for limiting the cover plate (2) is arranged on the outer circumferential side surface of the shell (1), an inner ring strip (4) is arranged inside the shell (1), a filter plate (5) is placed on the top of the inner ring strip (4), and a mint segment is placed on the top of the filter plate (5), a plurality of protruding rods (6) penetrating the inner ring strip (4) are fixed to the bottom surface of the filter plate (5), a plurality of through holes (7) are arranged on the surface of the inner ring strip (4), and the plurality of protruding rods (6) correspond to the plurality of through holes (7) one by one, a plurality of brackets (8) are fixed to the top surface of the filter plate (5), and an extruding component for pressing the mint segment is arranged on the surface of the bracket (8), and the extruding component cooperates with the filter plate (5) to press the mint segment.

3. The essential oil extraction process according to claim 2, characterized in that: A plurality of side plates (9) are fixed to the circumferential outer side surface of the shell (1); the limiting component comprises a plurality of rotating frames (10); the bottom end of the rotating frame (10) is rotatably clamped on the top end of the side plate (9); the top end of the rotating frame (10) is sleeved with an elastic sleeve (11); the top surface of the cover plate (2) is provided with an annular groove, and the elastic sleeve (11) on the top of the rotating frame (10) is fitted and clamped inside the annular groove of the cover plate (2).

4. The essential oil extraction process according to claim 2, characterized in that: Two opposite arc-shaped plates (12) are arranged at the bottom of the through hole (7) of the inner ring strip (4); the outer circumferential side surface of the convex rod (6) is in contact with the inner concave surface of the arc-shaped plates (12); a bottom plate (13) penetrating the two arc-shaped plates (12) is arranged at the bottom of the convex rod (6); an outer rod (14) is arranged on the outer side of the arc-shaped plates (12); the bottom end of the outer rod (14) penetrates the bottom end of the bottom plate (13); a nut (15) is spirally sleeved on the bottom end of the outer rod (14); a spring (16) is sleeved on the surface of the outer rod (14); the top end of the spring (16) is connected to the bottom surface of the inner ring strip (4); and the bottom end of the spring (16) is connected to the top surface of the bottom plate (13).

5. The essential oil extraction process according to claim 2, characterized in that: The extrusion component comprises a movable plate (17), the outer end of the movable plate (17) is embedded in the inner side of the bracket (8), a vertical rod (18) is embedded in the bracket (8), the outer end of the movable plate (17) is sleeved on the surface of the vertical rod (18), an elastic member (19) is sleeved on the surface of the vertical rod (18), the top end of the elastic member (19) is connected to the bottom surface of the movable plate (17), and the bottom end of the elastic member (19) is connected to the top surface of the filter plate (5), and the elastic force of the elastic member (19) enables the movable plate (17) to drive the extrusion component to squeeze the mint segment on the top surface of the filter plate (5).

6. The essential oil extraction process according to claim 5, characterized in that: Cross bars (20) are fixed to both sides of the movable plate (17), and a rotating frame (21) is sleeved on the outer end of the cross bar (20). A circular plate is fixed to the outer end of the cross bar (20), and a torsion spring (22) is sleeved on the surface of the cross bar (20). The inner side of the rotating rotating frame (21) is connected to the circular plate by means of the torsion spring (22), and a pressing plate (23) is fixed to the outer side of the circumference of the rotating frame (21). The twisting force of the torsion spring (22) enables the rotating frame (21) to squeeze the mint segment by means of the pressing plate (23).

7. The essential oil extraction process according to claim 6, characterized in that: The extrusion component also includes a plurality of connecting frames, two adjacent pressing plates (23) are connected by means of the connecting frames, and the pressing plates (23) use the connecting frames to extrude the mint segments, the connecting frames include two side frames, the side frames include a first pressure strip (24) and a second pressure strip (25), the first pressure strip (24) and the second pressure strip (25) are fixedly connected by means of a connecting rod, and a sliding groove (26) corresponding to the connecting rod is provided on the surface of the pressing plate (23).

8. The essential oil extraction process according to claim 7, characterized in that: A pull rod (27) penetrating the second pressure strip (25) is fixed to the end surface of the first pressure strip (24), a slide rod (28) is fixed to the end of the pull rod (27), a limiting groove corresponding to the slide rod (28) is provided on the surface of the second pressure strip (25), and the surface of the slide rod (28) is connected to the inner end of the limiting groove by a spring sheet (29).

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