Tea leaf extraction method and system

Abstract

The invention discloses a tea leaf extraction method and system, and relates to the technical field of tea leaf essential oil extraction. The method comprises the following steps: pre-treating tea leaves; adding purified water into an extraction tank, and adding the pretreated tea leaves into the extraction tank through a feeding pipe; hot steam is input into the extraction tank through a steam pipe, and a valve on a connecting pipe between the separator and the extraction tank is opened; according to the method, essential oil is distilled and extracted through the extraction tank, the situation that tea leaves are stacked on the partition plate in the distillation process can be effectively reduced, then the contact area of steam and the tea leaf raw materials on the partition plate can be effectively increased, the steam can effectively heat and extract the essential oil in the tea leaf raw materials, the extraction efficiency is improved, and the production cost is reduced. Meanwhile, the multiple groups of air bags in the device are matched for use, so that the problems of low hot steam discharge rate, low essential oil extraction rate and poor extraction effect caused by tea accumulation in the distillation process are effectively solved, and the extraction rate of the essential oil is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tea essential oil extraction, and in particular relates to a tea extraction method and system. Background Art

[0002] Tea essential oil is a volatile aromatic substance extracted from tea leaves. The extraction process of tea essential oil is extremely complicated. The more commonly used method in the prior art is distillation extraction, which heats the tea leaves with high-temperature steam, collects the water vapor containing the essential oil, and then extracts and purifies the essential oil.

[0003] However, the distillation extraction method in the prior art still has certain shortcomings. During the distillation process, the prior art generally uses an extraction tank to distill the tea leaves. However, after most of the tea leaves are added to the extraction tank, they are generally accumulated on the partition. When the steam below heats the tea leaves on the partition, it may only be able to fully heat the tea leaves on the surface. The tea leaves accumulated inside may not be able to fully contact the hot steam, and the extraction efficiency of the essential oil may not be high. At the same time, the contact effect between the tea leaves accumulated inside and the hot steam may not be good, the heating effect of the internal tea leaves may not be good, the essential oil inside the tea leaves may not be able to fully overflow, and the extraction effect of the essential oil in the tea leaves may need to be further improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a tea extraction method and system that can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a tea extraction method, the steps are as follows:

[0006] Step 1: pre-treat the tea leaves;

[0007] Step 2: Add purified water into the extraction tank, and add the pre-treated tea leaves into the extraction tank through the feed pipe;

[0008] Step 3: Input hot steam into the extraction tank through the steam pipe, and open the valve on the connecting pipe between the separator and the extraction tank;

[0009] Step 4: Start distillation extraction;

[0010] Step 5: condensing through a first condenser to separate the essential oil from the water;

[0011] Step 6, collecting the upper layer of essential oil and filtering to obtain crude essential oil;

[0012] Step 7: passing the collected crude essential oil into a reaction tank, and adding anhydrous sodium sulfate into the reaction tank for dehydration and purification;

[0013] Step 8: Fill the purified essential oil into packaging barrels for storage.

[0014] A tea extraction system, wherein the extraction tank comprises a tank body and a tank cover, wherein the tank cover is detachably connected to the tank body, wherein a partition is connected to the tank body, wherein a first air bag is fixedly connected to the inner wall of the tank body, wherein the top of the first air bag abuts against the partition, wherein a second air bag is fixedly connected to the inner wall of the tank body, wherein a first air pipe is fixedly connected to the tank body, wherein one end of the first air pipe is connected to the second air bag, and the other end of the first air pipe is connected to the first air bag.

[0015] In order to ensure the sealing effect of the partition, further, a sealing rod is slidably connected to the partition, multiple groups of the sealing rods are evenly distributed on the partition, and the sealing rods match the air holes opened on the partition, and a cover plate is fixedly connected to the sealing rod, and the cover plate is attached to the partition.

[0016] Furthermore, a first magnet is fixedly connected to the cover plate, and a second magnet is fixedly connected to the partition plate, and the first magnet and the second magnet attract each other.

[0017] In order to ensure that the cover plate can be quickly reset, further, a placement groove is opened on the partition plate, an elastic rope is fixedly connected in the placement groove, and one end of the elastic rope away from the partition plate is fixedly connected to the cover plate.

[0018] In order to prevent the partition and the cover from excessive sliding, a limit plate is fixedly connected to the inner wall of the tank body, and a third magnet is fixedly connected to the bottom of the limit plate, and the third magnet and the first magnet attract each other.

[0019] Furthermore, a third airbag is fixedly connected to the second airbag, and a plurality of groups of the third airbags are evenly distributed on the second airbag. A second air pipe is fixedly connected to the third airbag, and the second air pipe is communicated with the second airbag.

[0020] Furthermore, a first pressure storage chamber is opened in the tank body, a third air pipe is fixedly connected to the bottom of the second airbag, the third air pipe is connected to the first pressure storage chamber, and a first injection pipe is fixedly connected to the inner wall of the tank body, the first injection pipe is connected to the first pressure storage chamber.

[0021] In order to stack the tea leaves in piles on the cover plate, further, the first air jet pipe is arranged obliquely on the tank body, and the air outlet end of the first air jet pipe faces the partition plate.

[0022] In order to facilitate the sealing rod to be inserted into the partition, further, a curved surface is provided at the bottom of the sealing rod.

[0023] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: through the extraction tank in the method for distilling and extracting essential oils, the situation where tea leaves are accumulated on the partition during the distillation process can be effectively reduced, and then the contact area between the steam and the tea raw materials on the partition can be effectively increased, so that the steam can effectively heat and extract the essential oils in the tea raw materials, thereby improving the extraction efficiency. At the same time, the coordinated use of multiple groups of air bags in the device effectively solves the problem of slow hot steam discharge rate, slow essential oil extraction rate and poor extraction effect caused by tea leaves accumulation during the distillation process, thereby further improving the extraction rate of essential oils. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the attached picture:

[0025] Figure 1 Schematic diagram of the connection structure between the extraction tank and the vaporization tank in the tea extraction method proposed by the present invention Figure 1 ;

[0026] Figure 2 Schematic diagram of the connection structure between the extraction tank and the vaporization tank in the tea extraction method proposed by the present invention Figure 2 ;

[0027] Figure 3 A schematic diagram of the structure of an extraction tank in a tea extraction system proposed by the present invention;

[0028] Figure 4 A cross-sectional view of an extraction tank in a tea extraction system proposed by the present invention Figure 1 ;

[0029] Figure 5 A tea extraction system proposed by the present invention Figure 4 Enlarged view of part A;

[0030] Figure 6 A tea extraction system proposed by the present invention Figure 4 Enlarged view of part B;

[0031] Figure 7 A tea extraction system proposed by the present invention Figure 4 Enlarged view of part C in the middle;

[0032] Figure 8 A schematic diagram of the connection structure of the first air bag and the second air bag in a tea extraction system proposed by the present invention;

[0033] Fig. 9 A cross-sectional view of an extraction tank in a tea extraction method proposed by the present invention Figure 2 .

[0034] In the figure: 1, tank body; 101, tank cover; 102, steam pipe; 103, limit plate; 1031, third magnet; 104, feed pipe; 2, collecting tube; 3, first air bag; 4, partition; 401, second magnet; 402, placement groove; 4021, elastic rope; 5, second air bag; 501, first gas pipe; 6, first pressure storage chamber; 601, first injection pipe; 602, third gas pipe; 7, third air bag; 701, second gas pipe; 8, cover plate; 801, first magnet; 802, sealing rod; 8021, arc surface; 9, second pressure storage chamber; 10, second injection pipe; 11, first condenser; 12, vaporizer; 13, second condenser; 14, separation tank; 15, separator; 16, connecting pipe. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0036] Embodiment 1:

[0037] Reference Figure 1-Figure 8 , a tea extraction method, the steps are as follows:

[0038] Step 1: Pre-treat the tea leaves, use a sieve to sift out the debris and small stones in the tea leaves, and select high-quality tea leaves;

[0039] Step 2: Open the water injection valve on the extraction tank, inject 300-1000 kg of purified water into the extraction tank, so that the water level is ten centimeters higher than the steam pipe 102 at the bottom of the essential oil extraction tank, open the feed pipe 104, add 100-500 kg of tea raw materials into the extraction tank, and close the feed pipe 104;

[0040] Step 3: half-open the cooling water valve, open the air inlet valve of the extraction tank steam pipe 102 to add steam, control the steam pressure at 0.05-0.08MPa, open the water outlet valve between the oil-water separator 15 and the extraction tank, close the valve between the oil-water separator 15 and the storage tank, and start the distillation operation;

[0041] Step 4: start timing when condensed water flows out of the water outlet of the first condenser 11, and let the condensed water enter the extraction tank through the oil-water separator 15 and the extraction tank connecting pipe 16, and perform re-distillation purification, and continue extraction for 1.5-5 hours;

[0042] Step 5, close and adjust the water outlet valve of the oil-water separator 15 storage tank. As the condensed water in the first condenser 11 slowly enters the oil-water separator 15, the essential oil level in the oil-water separator 15 continues to rise and flows out from the oil outlet, and is collected by an essential oil collector. When the essential oil at the oil outlet is completely discharged and a small amount of pure dew or water flows into the collector, open the water outlet valve between the oil-water separator 15 and the pure dew storage tank, and let all the pure dew in the oil-water separator enter the liquid storage tank. Filter the collected upper essential oil with a double barrel filter to obtain crude essential oil.

[0043] Step 6: Collect each batch of crude essential oil, pass it into a 100L reaction tank, add anhydrous sodium sulfate, and let it stand for 8 hours to remove water and purify;

[0044] Step 7: passing the collected crude essential oil into a reaction tank, and adding anhydrous sodium sulfate into the reaction tank for dehydration and purification;

[0045] Step 8: Fill the purified essential oil into packaging barrels for storage;

[0046] Step 9. Drain the tea residue from the extraction tank and clean it thoroughly to facilitate the next distillation.

[0047] It should be noted that, during the process of extracting essential oils by distillation, the vaporizer 12 can also deliver the extraction medium to the first condenser 11, and the extraction medium will follow the water-oil stock solution into the separator 15, thereby effectively extracting and separating the essential oils from the water;

[0048] It should also be noted that purified water is pure water on the market that has been filtered by a purifier.

[0049] Embodiment 2:

[0050] Reference Figure 1-Figure 2 , tea extraction system, during the extraction process, the extraction medium is also separated and recovered through the separation tank 14, and the separated and recovered extraction medium gas will be condensed again through the second condenser 13, and finally refluxed to the vaporization tank 12 for reuse.

[0051] In step 2, the extraction tank includes a tank body 1 and a tank cover 101, the tank cover 101 is detachably connected to the tank body 1 by bolts, a partition 4 is connected to the tank body 1, a first airbag 3 is fixedly connected to the inner wall of the tank body 1, the top of the first airbag 3 is against the partition 4, a second airbag 5 is fixedly connected to the inner wall of the tank body 1, a first air pipe 501 is fixedly connected to the tank body 1, one end of the first air pipe 501 is connected to the second airbag 5, and the other end of the first air pipe 501 is connected to the first airbag 3.

[0052] The partition 4 is slidably connected with sealing rods 802 , and multiple groups of sealing rods 802 are evenly distributed on the partition 4 , and the sealing rods 802 match the air holes opened on the partition 4 , and the sealing rods 802 are fixedly connected with a cover plate 8 , and the cover plate 8 is attached to the partition 4 .

[0053] The cover plate 8 is fixedly connected with a first magnet 801 , and the partition plate 4 is fixedly connected with a second magnet 401 . The first magnet 801 and the second magnet 401 attract each other.

[0054] The partition plate 4 is provided with a placement groove 402 , in which an elastic rope 4021 is fixedly connected. One end of the elastic rope 4021 away from the partition plate 4 is fixedly connected to the cover plate 8 .

[0055] Reference Figure 4 , Figure 6 By means of the elastic rope 4021 arranged on the partition 4, the cover plate 8 can be pulled down and reset quickly.

[0056] A limiting plate 103 is fixedly connected to the inner wall of the tank body 1 , and a third magnet 1031 is fixedly connected to the bottom of the limiting plate 103 . The third magnet 1031 and the first magnet 801 attract each other.

[0057] It should be noted that the third magnet 1031 is an electromagnet available on the market.

[0058] The second airbag 5 is fixedly connected to the third airbag 7 , and multiple groups of third airbags 7 are evenly distributed on the second airbag 5 . The third airbag 7 is fixedly connected to the second air pipe 701 , and the second air pipe 701 is communicated with the second airbag 5 .

[0059] A first pressure storage chamber 6 is opened in the tank body 1, a third air supply pipe 602 is fixedly connected to the bottom of the second airbag 5, the third air supply pipe 602 is communicated with the first pressure storage chamber 6, and a first injection pipe 601 is fixedly connected to the inner wall of the tank body 1, the first injection pipe 601 is communicated with the first pressure storage chamber 6.

[0060] It should be noted that the first airbag 3 , the second airbag 5 and the third airbag 7 are all elastic and wear-resistant airbags available on the market.

[0061] It should also be noted that the elastic deformation of the top of the first airbag 3 is greater than the elastic deformation of the side wall, thereby ensuring that the first airbag 3 can stably push up the partition 4, and the elastic deformation of the third airbag 7 toward the side of the can body 1 is greater than the elastic deformation of the side wall of the third airbag 7, thereby ensuring that the third airbag 7 can stably extend laterally to hit the tea leaves suspended in the air.

[0062] The first air injection pipe 601 is obliquely arranged on the tank body 1 , and the air outlet end of the first air injection pipe 601 faces the partition plate 4 .

[0063] Reference Figure 3-Figure 8During use, hot air is input into the tank body 1 through the steam pipe 102. With the input of hot air, the water below the partition 4 will be heated and heated. After a period of hot air input, the temperature below the partition 4 gradually rises, and the pressure gradually increases. At this time, the first airbag 3 is squeezed by the air pressure in the tank body 1, and the top of the first airbag 3 will be deformed. At this time, the top of the first airbag 3 will bulge and support the partition 4. At this time, the partition 4 will move upward under the thrust of the first airbag 3 and the thrust of the steam below. At this time, the partition 4 will push the tea leaves above to move upward;

[0064] Reference Figure 4 , Figure 6 When the first airbag 3 swells to the maximum limit, the cover plate 8 moves up to the same position as the top of the second airbag 5, and the third magnet 1031 is energized. The third magnet 1031 will generate suction on the first magnet 801. At this time, the suction of the third magnet 1031 on the first magnet 801 is greater than the suction of the second magnet 401 on the first magnet 801. At this time, the third magnet 1031 instantly absorbs and moves the first magnet 801 upward, and the third magnet 1031 will synchronously drive the cover plate 8 to move upward instantly. At this time, the cover plate 8 will drive the sealing rod 802 to be pulled out of the partition 4. At this time, the hot steam under the partition 4 will instantly blow the tea leaves on the cover plate 8 through the air vents, thereby effectively extracting essential oil from the tea leaves on the cover plate 8. The essential oil vapor and hot steam heated by steam pass through the collecting tube 2 together, and enter the first condenser 11 through the connecting pipe 16 for layered extraction.

[0065] It should be noted that, refer to Fig. 9 On the cover plate 8, except for the position of the sealing rod 802, a ventilation hole is opened so that the steam below can blow the tea leaves on the cover plate 8.

[0066] At the moment when the third magnet 1031 and the first magnet 801 collide and attract each other, the tea leaves on the cover plate 8 will be lifted up due to the impact force generated by the collision, thereby effectively changing the position of the tea leaves piled together, thereby ensuring the effect of subsequent distillation and extraction of essential oils.

[0067] Reference Figure 4-Figure 7After the hot steam under the partition 4 is ejected for a period of time, the air pressure and temperature under the partition 4 decrease. At this time, the third magnet 1031 is powered off, and the third magnet 1031 will no longer attract the first magnet 801. At this time, the cover 8 will instantly impact the partition 4 downward under the reset pulling force of the elastic rope 4021 and the suction force between the first magnet 801 and the second magnet 401. At this time, the partition 4 will slide downward under the impact of the cover 8. The sliding partition 4 will squeeze the first airbag 3, and the gas in the first airbag 3 will be instantly pressed into the second airbag 5 and enter the second airbag 5. The gas will inflate the second airbag 5 and the third airbag 7, and the second airbag 5 can initially impact the tea leaves that are momentarily suspended in the air. At the same time, when the third airbag 7 is inflated, the third airbag 7 can extend horizontally for a distance, and thus can hit the tea leaves that are closer to the center of the tank body 1, and thus can more fully hit the tea leaves suspended in the center. By inflating the second airbag 5 and the third airbag 7 to hit the tea leaves suspended in the air, the tea leaves can be dispersed and fall on the cover plate 8 when they fall, so as to ensure that the contact area between the steam and the tea leaves is increased during the next steam extraction of the essential oil, thereby further improving the extraction efficiency and effect of the essential oil.

[0068] After the tea leaves are suspended in the air and fall, they will fall on the cover plate 8, and then they will impact with the cover plate 8, so that the tea leaves can roll and move by themselves, thereby ensuring the dispersion effect after the tea leaves fall.

[0069] During use, the first airbag 3 expands and contracts back and forth, so that the partition 4 can be moved up and down, and the tea leaves on the cover 8 can be turned over multiple times, further ensuring that the steam below can fully contact the tea leaves, further improving the essential oil extraction efficiency and extraction effect.

[0070] It should be noted that a commercially available electromagnetic control valve may be provided on the first gas delivery pipe 501 to ensure that the gas in the first airbag 3 can be delivered to the second airbag 5 stably and quickly.

[0071] It should also be noted that an air intake pipe (not shown) is fixedly connected to the side wall of the first airbag 3 , the air intake pipe is connected to an external air supply pump, and both the air intake pipe and the first air supply pipe 501 are provided with a one-way valve.

[0072] Reference Figure 5 The third gas pipeline 602 is provided with a one-way pressure relief valve, and the first gas injection pipe 601 is provided with a commercially available control valve.

[0073] Reference Figure 4-Figure 7When the tea leaves fall onto the cover plate 8, the pressure relief valve on the third air pipe 602 is opened, and the gas on the second air bag 5 is released into the first pressure storage chamber 6, and the gas entering the first pressure storage chamber 6 is stored in the first pressure storage chamber 6. When the tea leaves fall stably onto the cover plate 8, the control valve on the first injection pipe 601 can be opened, and the gas in the first pressure storage chamber 6 is instantly ejected through the first injection pipe 601, and the gas ejected through the first injection pipe 601 will blow the tea leaves on the cover plate 8, thereby producing a stirring effect on the tea leaves, thereby preventing the tea leaves from accumulating during the falling process, so as to ensure the subsequent distillation effect of the tea leaves.

[0074] The bottom of the sealing rod 802 is provided with an arc surface 8021 .

[0075] Reference Figure 6 Through the arc surface 8021 opened at the bottom of the sealing rod 802, the sealing rod 802 can be quickly inserted into the air vent on the partition 4 when it is pulled to reset by the elastic rope 4021, thereby ensuring that the cover plate 8 can quickly fit and seal with the partition 4.

[0076] The present invention uses the extraction tank in the method to distill and extract essential oils, which can effectively reduce the accumulation of tea leaves on the partition 4 during the distillation process, and can effectively increase the contact area between the steam and the tea raw materials on the partition 4, so that the steam can effectively heat and extract the essential oils in the tea raw materials, thereby improving the extraction efficiency. At the same time, the coordinated use of multiple groups of air bags in the device effectively solves the problem of slow hot steam discharge rate, slow essential oil extraction rate and poor extraction effect caused by tea leaf accumulation during the distillation process.

[0077] Embodiment 3:

[0078] Reference Fig. 9 , a tea extraction system, which is basically the same as Example 2, and further, a second pressure storage chamber 9 is opened on the side wall of the tank body 1, and the second pressure storage chamber 9 is connected to the second air bag 5 through the air supply pipe. A second injection pipe 10 is fixedly connected to the side wall of the tank body 1, and the air outlet end of the second injection pipe 10 faces the partition 4.

[0079] Reference Fig. 9The second jet pipe 10 is provided with a control valve which can be purchased on the market. When the tea leaves fall on the cover plate 8, the pressure relief valve on the air delivery pipe is opened. At this time, the gas on the second airbag 5 will be discharged into the second pressure storage chamber 9, and the gas entering the second pressure storage chamber 9 will be stored in the second pressure storage chamber 9. When the tea leaves fall stably on the cover plate 8, the control valve on the second jet pipe 10 can be opened. At this time, the gas in the second pressure storage chamber 9 will be instantly ejected through the second jet pipe 10. The gas ejected through the second jet pipe 10 will blow the tea leaves in the center of the cover plate 8, thereby producing a stirring effect on the tea leaves, thereby preventing the tea leaves from being accumulated in the center during the falling process, so as to ensure the subsequent distillation effect of the tea leaves, and at the same time solves the problem that the first jet pipe 601 is easy to blow the tea leaves to the center of the cover plate 8 when blowing on the tea leaves.

[0080] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A tea extraction method, characterized in that: Here are the steps: Step 1: pre-treat the tea leaves; Step 2: Add purified water into the extraction tank, and add the pre-treated tea leaves into the extraction tank through the feed pipe (104); Step 3: input hot steam into the extraction tank through the steam pipe (102), and open the valve on the connecting pipe (16) between the separator (15) and the extraction tank; Step 4: Start distillation extraction in the extraction tank; Step 5: condensing the essential oil through the first condenser (11) to separate the essential oil from the water; Step 6, collecting the upper layer of essential oil and filtering to obtain crude essential oil; Step 7: passing the collected crude essential oil into a reaction tank, and adding anhydrous sodium sulfate into the reaction tank for dehydration and purification; Step 8: Fill the purified essential oil into packaging barrels for storage.

2. A tea extraction system using the tea extraction method according to claim 1, characterized in that: The extraction tank comprises a tank body (1) and a tank cover (101), wherein the tank cover (101) is detachably connected to the tank body (1), a partition (4) is connected to the tank body (1), a first air bag (3) is fixedly connected to the inner wall of the tank body (1), the top of the first air bag (3) abuts against the partition (4), a second air bag (5) is fixedly connected to the inner wall of the tank body (1), a first air supply pipe (501) is fixedly connected to the tank body (1), one end of the first air supply pipe (501) is connected to the second air bag (5), and the other end of the first air supply pipe (501) is connected to the first air bag (3).

3. A tea extraction system according to claim 2, characterized in that: The partition (4) is slidably connected to a sealing rod (802), and a plurality of groups of the sealing rods (802) are evenly distributed on the partition (4). The sealing rods (802) match the air holes provided on the partition (4). The sealing rods (802) are fixedly connected to a cover plate (8), and the cover plate (8) is in contact with the partition (4).

4. A tea extraction system according to claim 3, characterized in that: The cover plate (8) is fixedly connected with a first magnet (801), and the partition plate (4) is fixedly connected with a second magnet (401), and the first magnet (801) and the second magnet (401) attract each other.

5. A tea extraction system according to claim 3, characterized in that: The partition plate (4) is provided with a placement groove (402), an elastic rope (4021) is fixedly connected in the placement groove (402), and one end of the elastic rope (4021) away from the partition plate (4) is fixedly connected to the cover plate (8).

6. A tea extraction system according to claim 5, characterized in that: A limiting plate (103) is fixedly connected to the inner wall of the tank body (1), a third magnet (1031) is fixedly connected to the bottom of the limiting plate (103), and the third magnet (1031) and the first magnet (801) attract each other.

7. A tea extraction system according to claim 2, characterized in that: The second airbag (5) is fixedly connected to a third airbag (7), a plurality of groups of the third airbags (7) are evenly distributed on the second airbag (5), the third airbag (7) is fixedly connected to a second air supply pipe (701), and the second air supply pipe (701) is in communication with the second airbag (5).

8. A tea extraction system according to claim 7, characterized in that: A first pressure storage chamber (6) is provided in the tank body (1); a third air supply pipe (602) is fixedly connected to the bottom of the second air bag (5); the third air supply pipe (602) is communicated with the first pressure storage chamber (6); a first air injection pipe (601) is fixedly connected to the inner wall of the tank body (1); the first air injection pipe (601) is communicated with the first pressure storage chamber (6).

9. A tea extraction system according to claim 8, characterized in that: The first air injection pipe (601) is arranged obliquely on the tank body (1), and the air outlet end of the first air injection pipe (601) faces the partition plate (4).

10. The tea extraction system according to claim 3, characterized in that: The bottom of the sealing rod (802) is provided with an arc-shaped surface (8021).

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