Low-temperature oregano essential oil extraction device

Abstract

The invention discloses a low-temperature oregano essential oil extraction device, which relates to the technical field of essential oil extraction, and comprises a distillation retort, a first-stage condenser, a rack, a control panel, a heater arranged on the rack, a second-stage condenser, a negative pressure device and an essential oil separating and drying device, the negative pressure device comprises a reciprocating driving mechanism, a Y-shaped connector, a three-way pipe, a communicating pipe and two negative pressure tanks, the middles of the two negative pressure tanks are slidably sleeved with pistons, and one piston is in transmission connection with the reciprocating driving mechanism. According to the low-temperature oregano essential oil extraction device, the boiling point of water is reduced through a negative pressure distillation technology, so that steam can carry essential oil components more easily to rise to the top of the distiller, and the extraction efficiency is improved; the damage of high temperature to the biological activity of aromatic phenols and terpenoids in the origanum vulgare essential oil is effectively avoided, and the original fragrance of the essential oil is better reserved.

Description

Technical Field

[0001] The invention relates to the technical field of essential oil extraction, in particular to a low-temperature oregano essential oil extraction device. Background Art

[0002] Oregano essential oil, as a natural plant essential oil, has a wide range of antibacterial, antioxidant and anti-inflammatory effects and is widely used in food, health products, cosmetics, medicine and other fields. Its unique aroma and pharmacological effects make it a popular natural additive and health product in people's daily lives.

[0003] In the prior art, the extraction of oregano essential oil mainly relies on the traditional distillation method, which usually includes mixing crushed oregano with distilled water, heating to boiling, allowing the essential oil components to escape with the steam, and collecting them by condensation. The entire extraction process is relatively simple, which not only has limited control over the quality of the essential oil, but also the water boils under normal pressure. The high temperature environment easily destroys the biological activity of the aromatic phenols and terpenes in the oregano essential oil, resulting in damage to the original aroma and pharmacological effects of the essential oil.

[0004] Therefore, it is necessary to propose a low-temperature oregano essential oil extraction device to solve the above problems. Summary of the invention

[0005] Technical problem to be solved: The purpose of the present invention is to provide a low-temperature oregano essential oil extraction device to solve the problem that the extraction process of the existing distillation extraction device proposed in the above background technology is relatively simple, not only the quality control of the essential oil is limited, but also water boils under normal pressure, and the high temperature environment easily destroys the biological activity of the aromatic phenols and terpenes in the oregano essential oil, resulting in damage to the original aroma and pharmacological effects of the essential oil.

[0006] Technical solution: To achieve the above purpose, the present invention is implemented through the following technical solution: a low-temperature oregano essential oil extraction device, including a distillation tank, a first-level condenser, a frame, a control panel and a heater arranged on the frame, and also including a second-level condenser, a negative pressure device and an essential oil separation and drying device, the negative pressure device includes a reciprocating drive mechanism, a Y-type joint, a three-way pipe, a connecting pipe and two negative pressure tanks, the middle parts of the two negative pressure tanks are slidably sleeved with pistons, and one of the pistons is drivingly connected to the reciprocating drive mechanism; the distillation tank is placed on the heater and connected to the upper parts of the two negative pressure tanks through the Y-type joint, and the two output ends of the Y-type joint are provided with a one-way exhaust valve; one end of the three-way pipe is connected to the input end of the separation and drying device through the first-level condenser and the second-level condenser, and the other two ends of the three-way pipe are respectively connected to the two negative pressure tanks. The upper part of the tank is connected, and a one-way air inlet valve is arranged in the port where the three-way pipe is connected to the negative pressure tank, and the lower parts of the two negative pressure tanks are connected through a connecting pipe; the essential oil separation and drying device comprises a pure dew collector, an essential oil collecting bottle, an essential oil drying bottle, an oil-water separation bottle and an oil-water separation position line monitor arranged on one side of the oil-water separation bottle, the oil-water separation bottle is arranged below the output end of the second-level condenser, and an essential oil discharge pipe is arranged on the upper part of the oil-water separation bottle, and a pure oil discharge pipe is arranged on the lower part; one end of the essential oil discharge pipe extends into the essential oil drying bottle, one end of the pure oil discharge pipe extends into the pure dew collector, and a second valve is arranged on the pure oil discharge pipe, the second valve is controlled and connected to the oil-water separation position line monitor, the essential oil drying bottle is filled with desiccant, an essential oil discharge pipe is arranged at the bottom of the essential oil drying bottle, and one end of the essential oil discharge pipe extends into the essential oil collecting bottle.

[0007] Preferably, the distillation tank includes a distiller, and also includes a sealing cover detachably mounted on the top of the distiller, and a temperature sensor and a pressure sensor mounted on the sealing cover, wherein the temperature sensor and the pressure sensor are both control-connected to a control panel, a waste pipe and a water level observation port are provided at the bottom of the distiller, and a first valve is provided on the waste pipe.

[0008] Preferably, the distiller is provided with a reflux device, which includes an overflow pipe fixedly installed on the upper part of the distiller, and an L-shaped reflux pipe fixedly installed on the bottom of the distiller, a feed hopper is fixedly installed on the upper end of the reflux pipe, the output end of the overflow pipe is located directly above the feed hopper, and a first valve is also provided on the overflow pipe.

[0009] Preferably, a plurality of limiting plates are evenly fixedly installed on the inner wall of the distiller along the circumference, a bendable pressing plate is arranged in the distiller below the limiting plates, and a plurality of circular holes are evenly opened on the pressing plate.

[0010] Preferably, the reciprocating drive mechanism is arranged in the cavity of the frame, and the reciprocating drive mechanism includes a drive ring installed in the cavity along a vertical sliding manner, a drive wheel arranged in the drive ring, and a drive motor fixedly installed in the cavity, a sleeve is fixedly installed at the bottom of the drive ring, and a push rod is fixedly installed at the top, and the other end of the push rod extends into one of the negative pressure tanks and is fixedly connected to the corresponding piston.

[0011] Preferably, two opposite side walls of the cavity are provided with vertically arranged sliding grooves, a sliding block is slidably installed in the sliding groove, and the other end of the sliding block is fixedly connected to the driving ring.

[0012] Preferably, a driving shaft is concentrically fixedly installed at the bottom of the driving wheel, the bottom end of the driving shaft passes through a sleeve and is fixedly connected to the output shaft of the driving motor, a wavy ring groove is provided on the outer ring surface of the driving wheel, and connecting rods are symmetrically fixedly installed on the driving rings on both sides of the driving wheel, and the other ends of the two connecting rods extend into the wavy ring groove and are embedded with balls.

[0013] Preferably, the stage II condenser comprises a stage II condenser shell, in which an upper sealing plate and a lower sealing plate are fixedly installed along the vertical interval inside the stage II condenser shell, and the two sealing plates divide the stage II condenser shell into three chambers: upper, middle and lower. A plurality of spiral tubes are evenly distributed along the circumference inside the middle chamber, and both ends of the spiral tubes are respectively connected with the upper and lower chambers, the output end of the stage I condenser is connected with the upper chamber, and the upper and lower ends of the middle chamber are respectively provided with a water inlet pipe and a water outlet pipe, and an oil-water discharge pipe is fixedly installed at the bottom of the lower chamber, and the other end of the oil-water discharge pipe extends into the oil-water separation bottle.

[0014] Preferably, a plurality of universal wheels are fixedly mounted on the bottom of the frame, and the plurality of universal wheels are symmetrically distributed in a rectangular shape. The valve on the overflow pipe is a solenoid valve. A liquid level gauge is provided in the distiller, and the liquid level gauge is control-connected to the solenoid valve. Electric heating wires are provided in the side walls of the two negative pressure tanks.

[0015] Preferably, an energy storage regulating mechanism is provided on the side wall of the distiller, and the energy storage regulating mechanism includes an energy storage tank and a sealing plug slidably mounted inside the energy storage tank, the bottom of the energy storage tank and the bottom of the sealing plug form a negative pressure balance chamber, a connecting pipe is fixedly installed on one side of the negative pressure balance chamber, the other end of the connecting pipe is connected to the upper part of the distiller, a spring is installed in the negative pressure balance chamber, a screw barrel is concentrically fixedly installed on the top of the energy storage tank, a screw is installed on the inner thread of the screw barrel, the lower end of the screw extends into the energy storage tank and is fixedly installed with a pressure plate, a pressure sensor is installed at the bottom center of the pressure plate, and an adjustment knob is provided at the exposed top end of the screw.

[0016] Beneficial effect: Compared with the prior art, the present invention provides a low-temperature oregano essential oil extraction device, which has a unique structure and is easy to use. After the device is started, the heater heats the distiller to boil the distilled water to generate steam. The steam carries the essential oil components in the oregano to the top of the distiller and enters the two negative pressure tanks through the Y-type joint. The driving motor drives the driving wheel to rotate, and the driving ring is driven to move through the matching arrangement of the wavy ring groove and the ball, thereby pushing the piston in one of the negative pressure tanks to move up and down. The two negative pressure tanks are connected through a connecting pipe, and the Y-type joint and the three-way pipe are respectively provided with a one-way exhaust valve and a one-way intake valve to ensure that the steam can only flow in one direction.

[0017] When the piston moves upward, negative pressure is formed in the vacuum tank, thereby lowering the boiling point of the water in the distiller and protecting the biologically active ingredients in the oregano essential oil.

[0018] The steam first enters the first-stage condenser for preliminary condensation. The condensed steam enters the second-stage condenser and is further condensed by the spiral tube to form an oil-water mixture. The oil-water mixture drips into the oil-water separation bottle through the oil-water discharge pipe. The oil-water mixture is stratified in the oil-water separation bottle. The pure dew of the lower layer flows into the pure dew collector through the pure dew discharge pipe, and the oregano essential oil of the upper layer flows into the essential oil drying bottle through the essential oil discharge pipe. After dehydration by the desiccant, it flows into the essential oil collection bottle. The oil-water separation position line monitor controls the opening and closing of the valve on the pure dew discharge pipe through the image recognition system to ensure that the oil-water separation position line after stratification is controlled below the essential oil discharge pipe to prevent the pure dew from entering the essential oil drying bottle.

[0019] Through the negative pressure distillation technology, the boiling point of water is lowered, making it easier for steam to carry the essential oil components to the top of the distiller, thereby improving the extraction efficiency. In addition, through the combination of negative pressure distillation and multi-stage condensation technology, the destruction of the biological activity of aromatic phenols and terpenes in oregano essential oil by high temperature is effectively avoided, and the original aroma of the essential oil is better preserved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 It is a three-dimensional schematic diagram of the distillation tank structure of the present invention; Figure 3 It is a schematic diagram of the interior of the distillation tank structure of the present invention; Figure 4 It is a three-dimensional schematic diagram of the structure of the second-stage condenser of the present invention; Figure 5 It is an internal schematic diagram of the structure of the second-stage condenser of the present invention; Figure 6 It is a three-dimensional schematic diagram of the oil-water separation bottle structure of the present invention; Figure 7It is a front view schematic diagram of the structure of the essential oil drying bottle of the present invention; Figure 8 It is a cross-sectional schematic diagram of the reciprocating drive mechanism of the present invention; Fig. 9 It is a cross-sectional schematic diagram of the energy storage tank mechanism of the present invention.

[0021] In the figure: 1. distiller; 2. heater; 3. rack; 4. universal wheel; 5. control panel; 6. hydrosol collector; 7. essential oil collection bottle; 8. essential oil drying bottle; 9. oil-water separation bottle; 10. essential oil discharge pipe; 11. Y-type connector; 12. temperature sensor; 13. hydrosol discharge pipe; 14. waste pipe; 15. first valve; 16. water level observation port; 17. reflux pipe; 18. feed hopper; 19. overflow pipe; 20. sealing cover; 21. pressure plate; 22. limit plate; 23. essential oil discharge pipe; 24. negative pressure tank; 25. three-way pipe; 26. first-stage condenser; 27. second-stage condenser shell; 28. second valve ; 29. ​​Oil-water discharge pipe; 30. Water inlet pipe; 31. Water outlet pipe; 32. Upper sealing plate; 33. Spiral tube; 34. Lower sealing plate; 35. Oil-water separation position line monitor; 36. Piston; 37. Connecting pipe; 38. Push rod; 39. Driving wheel; 40. Wave-shaped ring groove; 41. Ball; 42. Slider; 43. Driving ring; 44. Sleeve; 45. Driving shaft; 46. Driving motor; 47. Energy storage adjustment mechanism; 471. Energy storage tank; 472. Sealing plug; 473. Spring; 474. Screw barrel; 475. Screw; 476. Pressure plate; 477. Pressure sensor; 478. Adjustment knob; 479. Connecting pipe. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Example 1: This example 1 provides a low-temperature oregano essential oil extraction device, which is directly improved on the existing distillation extraction device and has a unique structure. Figure 1-9 As shown, it includes a distiller, a first-stage condenser 26, a frame 3, a control panel 5 and a heater 2 arranged on the frame 3, the control panel 5 is control-connected to the heater 2, and a temperature regulating device is arranged on the control panel 5. The temperature regulating device can regulate the heater 2 through the signal fed back by the temperature sensor 12, so that the temperature in the distiller 1 is maintained within a certain range; the distiller includes a distiller 1, and also includes a sealing cover 20 detachably mounted on the top of the distiller 1 and a temperature sensor 12 and a pressure sensor mounted on the sealing cover 20, the temperature sensor 12 and the pressure sensor are both control-connected to the control panel 5, a waste pipe 14 and a water level observation port 16 are arranged at the lower part of the distiller 1, and a first valve 15 is arranged on the waste pipe 14, and there are multiple ways to install the sealing cover 20, for example: threaded connection or snap-fitting on the distiller 1.

[0024] The distiller 1 is provided with a reflux device, which includes an overflow pipe 19 fixedly installed on the upper part of the distiller 1, and also includes an L-shaped reflux pipe 17 fixedly installed on the bottom of the distiller 1, a feed hopper 18 is fixedly installed on the upper end of the reflux pipe 17, the output end of the overflow pipe 19 is located directly above the feed hopper 18, and a first valve 15 is also provided on the overflow pipe 19; a plurality of limit plates 22 are evenly fixedly installed along the circumference on the inner wall of the distiller 1, a bendable pressing plate 21 is provided in the distiller 1 below the limit plate 22, a plurality of circular holes are evenly opened on the pressing plate 21, and the pressing plate 21 is made of elastic material to prevent the material from floating on the water surface during the distillation process, resulting in the inability to fully precipitate the essential oil.

[0025] It also includes a level II condenser, a negative pressure device and an essential oil separation and drying device. The negative pressure device includes a reciprocating drive mechanism, a Y-type joint 11, a three-way pipe 25, a connecting pipe 37 and two negative pressure tanks 24. The middle parts of the two negative pressure tanks 24 are slidably mounted with pistons 36, and one of the pistons 36 is transmission-connected to the reciprocating drive mechanism; the reciprocating drive mechanism is arranged in the cavity of the frame 3, and the reciprocating drive mechanism includes a drive ring 43 vertically slidably mounted in the cavity, a drive wheel 39 arranged in the drive ring 43 and a drive motor 46 fixedly mounted in the cavity, the drive motor 46 is control-connected to the control panel 5, and the control panel 5 can control the rotation speed of the drive motor 46 according to the size of the air pressure in the distiller 1, a sleeve 44 is fixedly mounted at the bottom of the drive ring 43, and a push rod 38 is fixedly mounted at the top, and the other end of the push rod 38 extends into one of the negative pressure tanks 24 and is fixedly connected to the corresponding piston 36.

[0026] Vertically arranged slide grooves are provided on the two opposite side walls of the cavity, and a slider 42 is slidably installed in the slide groove, and the other end of the slider 42 is fixedly connected to the driving ring 43; a driving shaft 45 is concentrically fixedly installed at the bottom of the driving wheel 39, and the bottom end of the driving shaft 45 passes through the sleeve 44 and is fixedly connected to the output shaft of the driving motor 46. A wavy annular groove 40 is provided on the outer ring surface of the driving wheel 39, and connecting rods are symmetrically fixedly installed on the driving rings 43 on both sides of the driving wheel 39, and the other ends of the two connecting rods extend into the wavy annular groove 40 and are embedded with balls 41.

[0027] The distillation tank is placed on the heater 2 and connected to the upper parts of the two negative pressure tanks 24 through the Y-type joint 11. The input end of the Y-type joint 11 is connected to the exhaust port on the sealing cover 20, and both output ends of the Y-type joint 11 are provided with a one-way exhaust valve; one end of the three-way pipe 25 is connected to the input end of the separation and drying device through the first-stage condenser 26 and the second-stage condenser, and the other two ends of the three-way pipe 25 are respectively connected to the upper parts of the two negative pressure tanks 24, and a one-way air inlet valve is provided in the port where the three-way pipe 25 is connected to the negative pressure tank 24, and the lower parts of the two negative pressure tanks 24 are connected through a connecting pipe 37.

[0028] The essential oil separation and drying device comprises a pure dew collector 6, an essential oil collection bottle 7, an essential oil drying bottle 8, an oil-water separation bottle 9, and an oil-water separation level line monitor 35 arranged on one side of the oil-water separation bottle 9. The oil-water separation bottle 9 is arranged below the output end of the second-level condenser, and the upper part of the oil-water separation bottle 9 is provided with an essential oil discharge pipe 10, and the lower part is provided with a pure oil discharge pipe 13; one end of the essential oil discharge pipe 10 extends into the essential oil drying bottle 8, one end of the pure oil discharge pipe 13 extends into the pure dew collector 6, and a second valve 28 is provided on the pure oil discharge pipe 13, and the second valve 28 is connected to the oil-water discharge pipe 13. The separation line monitor 35 controls the connection, and the essential oil drying bottle 8 is filled with a desiccant. There are many choices of desiccant, for example, sodium sulfate, which is used to further absorb a small amount of water in the essential oil. An essential oil discharge pipe 23 is provided at the bottom of the essential oil drying bottle 8, and one end of the essential oil discharge pipe 23 extends into the essential oil collecting bottle 7. The oil-water separation line monitor 35 uses image recognition to identify the oil-water separation line after stratification, thereby controlling the opening and closing size of the second valve 28, so that the oil-water separation line after stratification is controlled below the essential oil discharge pipe 10, thereby preventing pure dew from entering the essential oil drying bottle 8.

[0029] The second-stage condenser includes a second-stage condenser shell 27, in which an upper sealing plate 32 and a lower sealing plate 34 are fixedly installed along the vertical interval. The two sealing plates divide the second-stage condenser shell 27 into three chambers: upper, middle and lower. A plurality of spiral tubes 33 are evenly distributed along the circumference in the middle chamber, and the two ends of the spiral tubes 33 are respectively connected to the upper and lower chambers. The output end of the first-stage condenser 26 is connected to the upper chamber, and the upper and lower ends of the middle chamber are respectively provided with a water inlet pipe 30 and a water outlet pipe 31. An oil-water discharge pipe 29 is fixedly installed at the bottom of the lower chamber, and the other end of the oil-water discharge pipe 29 extends into the oil-water separation bottle 9. There are various condensation modes for the first-stage condenser 26 and the second-stage condenser, for example: the water inlets of the first-stage condenser 26 and the second-stage condenser are both connected to the output end of the chiller, and the water outlets are both connected to the input end of the chiller, so as to condense the high-temperature steam entering the first-stage condenser 26 and the second-stage condenser.

[0030] When we use the essential oil extraction device to extract oregano essential oil, first, both the first-level condenser 26 and the second-level condenser are connected to the chiller to allow cold water to circulate in the two condensers, and then the sealing cover 20 in the distiller 1 is opened, the pressing plate 21 is bent and taken out, and then the crushed oregano is placed in the distiller 1, and the pressing plate 21 is bent again and placed under the limit plate 22, and then distilled water is poured in so that the height of the distilled water exceeds the limit plate 22, so that the oregano is always immersed in the distilled water; at the same time, the heater 2 and the drive motor 46 are started, the heater 2 heats the distiller 1, and the drive motor 46 drives the drive wheel 39 to rotate, and drives the drive ring 43 to move through the matching setting of the wavy ring groove 40 and the ball 41, thereby pushing the piston 36 in one of the negative pressure tanks 24 to move up and down.

[0031] Moreover, since both output ends of the Y-type connector 11 are provided with a one-way exhaust valve, the port where the three-way pipe 25 is connected to the negative pressure tank 24 is provided with a one-way air inlet valve, and the lower parts of the two negative pressure tanks 24 are connected through the connecting pipe 37, when the driving motor 46 is in operation, the steam in the distillation tank can be continuously discharged into the first-stage condenser 26, so that the distillation tank is in a negative pressure state, thereby reducing the boiling point of the water in the distiller, protecting the biological activity of the aromatic phenols and terpenoids in the oregano essential oil, and better retaining the original aroma of the essential oil; oil-water mixing The combined steam is condensed by two condensers and then drips into the oil-water separation bottle 9, and is stratified in the oil-water separation bottle 9. The pure dew in the lower layer of the oil-water separation bottle 9 flows into the pure dew collector 6, and the oregano essential oil in the upper layer drips into the essential oil drying bottle 8, and then flows into the essential oil collecting bottle 7 after being dehydrated by the desiccant in the essential oil drying bottle 8. The oil-water separation line monitor 35 identifies the oil-water separation line after stratification through the image recognition system, so that the oil-water separation line after stratification is controlled below the essential oil discharge pipe 10, thereby preventing the pure dew from entering the essential oil drying bottle 8.

[0032] Embodiment 2: Embodiment 2 is different from Embodiment 1 in that Figure 1 As shown, a plurality of universal wheels 4 are fixedly installed at the bottom of the frame 3, and the plurality of universal wheels 4 are symmetrically distributed in a rectangular shape. The valve on the overflow pipe 19 is a solenoid valve. A liquid level gauge is arranged in the distiller 1. There are many options for the liquid level gauge, for example: a two-color water level gauge, the liquid level gauge is connected to the solenoid valve control, and electric heating wires are arranged in the side walls of the two negative pressure tanks 24. When the water in the distiller 1 boils and causes the water level to rise to the sealing cover 20, the liquid level gauge controls the solenoid valve to open, and the water flow at the top of the distiller 1 flows from the overflow pipe 19 to the feed hopper 18, and after cooling in the feed hopper 18, it flows back to the distiller 1 through the reflux pipe 17. The electric heating wire in the side wall of the negative pressure tank 24 can The temperature in the negative pressure tank 24 is increased to prevent the mixed steam from being cooled and liquefied in the negative pressure tank 24; in addition, in order to better extract the essential oil, the heights of the two output ends of the Y-type connector 11 should be higher than the height of the input end, the height of the port where the three-way pipe 25 is connected to the negative pressure tank 24 should be higher than the height of the input end of the first-level condenser 26, and the height of the input end of the first-level condenser 26 should be higher than the height of the output end, so that the liquid condensed in the Y-type connector 11 can flow back into the distiller 1, and the liquid condensed in the three-way pipe 25 can flow into the first-level condenser, and finally flow into the second-level condenser, so as to avoid the accumulation of liquid in the pipeline and affect the essential oil extraction effect.

[0033] Embodiment 3: Embodiment 3 is different from Embodiment 1 in that Fig. 9As shown, when the driving wheel 39 drives the piston 36 to move up and down reciprocatingly, the direction change process of the piston 36 is a process of first deceleration and then acceleration. This process will cause fluctuations in the negative pressure level in the distiller 1. To solve this problem, an energy storage regulating mechanism 47 can be set on the side wall of the distiller 1. The energy storage regulating mechanism 47 includes an energy storage tank 471 and a sealing plug 472 slidably mounted inside it. The bottom of the energy storage tank 471 and the bottom of the sealing plug 472 form a negative pressure balance chamber. A connecting pipe 479 is fixedly installed on one side of the negative pressure balance chamber. The other end of the connecting pipe 479 is connected to the upper part of the distiller 1. A spring 473 is installed in the negative pressure balance chamber. The top of the spring 473 is fixedly connected to the sealing plug 472. A screw barrel 474 is concentrically fixedly installed on the top of the energy tank 471, and a screw rod 475 is installed on the inner thread of the screw barrel 474. The lower end of the screw rod 475 extends into the energy storage tank 471 and is fixedly installed with a pressure plate 476. A pressure sensor 477 is installed at the bottom center of the pressure plate 476, and an adjusting knob 478 is provided at the exposed top end of the screw rod 475. When the adjusting knob 478 is turned, the depth of the pressure plate 476 can be controlled, thereby changing the initial height of the sealing plug 472. When the above-mentioned equipment is working, the pressure value of the pressure sensor 477 is required to be 0, that is, the sealing plug 472 needs to be separated from the pressure plate 476 during operation. At this time, the negative pressure balance chamber can achieve the purpose of balancing the negative pressure in the distiller 1.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature oregano essential oil extraction device, comprising a distillation tank, a first-stage condenser (26), a frame (3), a control panel (5), and a heater (2) arranged on the frame (3), characterized in that: It also includes a class II condenser, a negative pressure device and an essential oil separation and drying device, wherein the negative pressure device includes a reciprocating drive mechanism, a Y-type joint (11), a three-way pipe (25), a connecting pipe (37) and two negative pressure tanks (24), wherein the middle parts of the two negative pressure tanks (24) are both slidably sleeved with pistons (36), and one of the pistons (36) is drivingly connected to the reciprocating drive mechanism; the distillation tank is placed on the heater (2) and is connected to the upper parts of the two negative pressure tanks (24) through the Y-type joint (11), and both output ends of the Y-type joint (11) are provided with one-way exhaust valves; one end of the three-way pipe (25) is connected to the input end of the separation and drying device through the class I condenser (26) and the class II condenser, and the other two ends of the three-way pipe (25) are respectively connected to the upper parts of the two negative pressure tanks (24), and a one-way air inlet valve is provided in the port where the three-way pipe (25) is connected to the negative pressure tank (24), and the lower parts of the two negative pressure tanks (24) are connected through the connecting pipe. (37) are connected; the essential oil separation and drying device comprises a pure dew collector (6), an essential oil collection bottle (7), an essential oil drying bottle (8), an oil-water separation bottle (9), and an oil-water separation position line monitor (35) arranged on one side of the oil-water separation bottle (9); the oil-water separation bottle (9) is arranged below the output end of the second-level condenser, and the upper part of the oil-water separation bottle (9) is provided with an essential oil discharge pipe (10) and the lower part is provided with a pure dew discharge pipe (13); the essential oil discharge pipe (1 One end of the essential oil drying bottle (8) extends into the essential oil drying bottle (8), one end of the pure dew material pipe (13) extends into the pure dew collector (6), and a second valve (28) is provided on the pure dew material pipe (13), and the second valve (28) is control-connected to the oil-water separation position line monitor (35). The essential oil drying bottle (8) is filled with a desiccant, and an essential oil discharge pipe (23) is provided at the bottom of the essential oil drying bottle (8), and one end of the essential oil discharge pipe (23) extends into the essential oil collection bottle (7).

2. A low-temperature oregano essential oil extraction device according to claim 1, characterized in that: The distillation tank comprises a distiller (1), and also comprises a sealing cover (20) detachably mounted on the top of the distiller (1), and a temperature sensor (12) and a pressure sensor mounted on the sealing cover (20), wherein the temperature sensor (12) and the pressure sensor are both control-connected to a control panel (5), and a waste discharge pipe (14) and a water level observation port (16) are provided at the bottom of the distiller (1), and a first valve (15) is provided on the waste discharge pipe (14).

3. A low-temperature oregano essential oil extraction device according to claim 2, characterized in that: The distiller (1) is provided with a reflux device, which comprises an overflow pipe (19) fixedly mounted on the upper part of the distiller (1), and an L-shaped reflux pipe (17) fixedly mounted on the bottom of the distiller (1), a feed hopper (18) fixedly mounted on the upper end of the reflux pipe (17), an output end of the overflow pipe (19) is located directly above the feed hopper (18), and a first valve (15) is also provided on the overflow pipe (19).

4. A low-temperature oregano essential oil extraction device according to claim 2, characterized in that: A plurality of limiting plates (22) are evenly and fixedly mounted on the inner wall of the distiller (1) along the circumference, and a bendable pressing plate (21) is arranged in the distiller (1) below the limiting plates (22), and a plurality of circular holes are evenly opened on the pressing plate (21).

5. A low-temperature oregano essential oil extraction device according to claim 1, characterized in that: The reciprocating drive mechanism is arranged in a cavity of the frame (3), and comprises a drive ring (43) slidably mounted in the cavity in a vertical direction, a drive wheel (39) arranged in the drive ring (43), and a drive motor (46) fixedly mounted in the cavity; a sleeve (44) is fixedly mounted on the bottom of the drive ring (43), and a push rod (38) is fixedly mounted on the top; the other end of the push rod (38) extends into one of the negative pressure tanks (24) and is fixedly connected to the corresponding piston (36).

6. A low-temperature oregano essential oil extraction device according to claim 5, characterized in that: Two opposite side walls of the cavity are each provided with a vertically arranged slide groove, in which a slider (42) is slidably mounted, and the other end of the slider (42) is fixedly connected to a drive ring (43).

7. A low-temperature oregano essential oil extraction device according to claim 5, characterized in that: A driving shaft (45) is fixedly mounted concentrically on the bottom of the driving wheel (39), the bottom end of the driving shaft (45) passes through a sleeve (44) and is fixedly connected to an output shaft of a driving motor (46), a wavy annular groove (40) is formed on the outer annular surface of the driving wheel (39), connecting rods are symmetrically fixedly mounted on the driving rings (43) on both sides of the driving wheel (39), and the other ends of the two connecting rods extend into the wavy annular groove (40) and are embedded with balls (41).

8. The low-temperature oregano essential oil extraction device according to claim 1, characterized in that: The class II condenser comprises a class II condenser shell (27), an upper sealing plate (32) and a lower sealing plate (34) are fixedly installed in the class II condenser shell (27) along a vertical interval, the two sealing plates divide the class II condenser shell (27) into three chambers, namely, an upper chamber, a middle chamber and a lower chamber, a plurality of spiral tubes (33) are evenly distributed along the circumference in the middle chamber, the two ends of the spiral tubes (33) are respectively connected to the upper and lower chambers, the output end of the class I condenser (26) is connected to the upper chamber, the upper and lower ends of the middle chamber are respectively provided with a water inlet pipe (30) and a water outlet pipe (31), and an oil-water discharge pipe (29) is fixedly installed at the bottom of the lower chamber, and the other end of the oil-water discharge pipe (29) extends into the oil-water separation bottle (9).

9. A low-temperature oregano essential oil extraction device according to claim 3, characterized in that: A plurality of universal wheels (4) are fixedly mounted on the bottom of the frame (3), and the plurality of universal wheels (4) are symmetrically distributed in a rectangular shape. The valve on the overflow pipe (19) is a solenoid valve. A liquid level gauge is provided in the distiller (1), and the liquid level gauge is control-connected to the solenoid valve. Electric heating wires are provided in the side walls of the two negative pressure tanks (24).

10. The low-temperature oregano essential oil extraction device according to claim 3, characterized in that: An energy storage regulating mechanism (47) is provided on the side wall of the distiller (1). The energy storage regulating mechanism (47) comprises an energy storage tank (471) and a sealing plug (472) slidably mounted inside the energy storage tank (471). The bottom of the energy storage tank (471) and the bottom of the sealing plug (472) form a negative pressure balance chamber. A connecting pipe (479) is fixedly mounted on one side of the negative pressure balance chamber. The other end of the connecting pipe (479) is connected to the upper part of the distiller (1). A spring (473) is installed in the negative pressure balance chamber. A screw barrel (474) is fixedly mounted concentrically on the top of the energy storage tank (471). A screw rod (475) is internally threadedly mounted on the screw barrel (474). The lower end of the screw rod (475) extends into the energy storage tank (471) and is fixedly mounted with a pressure plate (476). A pressure sensor (477) is mounted at the center of the bottom of the pressure plate (476). An adjusting knob (478) is arranged at the exposed top end of the screw rod (475).

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