Pressurized brewing tea capsule

Abstract

The present invention discloses a pressure-brewing tea capsule, comprising: a capsule body having a brewing chamber for accommodating the object to be brewed, the capsule body being provided with a water outlet structure, the water outlet structure being provided with a first channel and a second channel, the second channel being connected to the brewing chamber through the first channel; a movable valve core, the movable valve core being in sealing sliding fit with the first channel to form a pressure-boosting brewing state in the brewing chamber, the movable valve core being squeezed and slid into the second channel when the pressure in the brewing chamber reaches the pressure-boosting brewing pressure, and the movable valve core being in clearance fit with the second channel to form a pressure-maintaining brewing state in the brewing chamber. The present invention can achieve pressure-boosting brewing first and then pressure-maintaining brewing during the first brewing, and the pressure-maintaining brewing pressure is less than the pressure-boosting brewing pressure, as well as multiple subsequent pressure-brewings, and the first extraction pressure is greater than the subsequent extraction pressures, which is more in line with the extraction characteristics of tea leaves, and has a simple structure, is easy to control the brewing pressure, has better stability, has low requirements for processing, and has a low manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of food packaging, and particularly to a pressurized brewing tea capsule. Background Art

[0002] The emergence of capsules has greatly facilitated the brewing of coffee and tea. However, most of the existing capsules on the market are designed specifically for coffee, and there are fewer capsules designed specifically for tea. Since tea and coffee are very different in both form and content, the extraction processes are also different. Therefore, directly applying coffee capsules to tea is not the best choice.

[0003] Currently, the capsules on the market are nothing more than two types. One is that the capsule itself cannot form pressure during brewing, and the other is that even if it can form pressure during brewing, the pressure cannot last throughout the brewing process, that is, pressurized brewing in the first half and the pressure disappearing in the second half. The existence of pressure is an important factor in promoting the rapid extraction of tea. Inability to perform pressurized extraction throughout the process is not conducive to the rapid brewing of tea. In addition, although there are tea capsules in the prior art that can maintain pressure during the second half of brewing, their structures are relatively complex, with high processing requirements and high manufacturing costs. Summary of the Invention

[0004] The purpose of the present invention is to provide a pressurized brewing tea capsule to solve the technical problems that the current capsule products cannot perform pressurized extraction throughout the process, which cannot ensure the full extraction of the effective substances in the tea and the lack of tea soup fragrance, and the precipitation of bitter substances in the tea caused by continuous high pressure.

[0005] The above object of the present invention can be achieved by the following technical solutions:

[0006] The present invention provides a pressurized brewing tea capsule, including: a capsule body having a brewing cavity for accommodating the object to be brewed, the capsule body being provided with a water outlet structure, the water outlet structure being provided with a first channel and a second channel, and the second channel being connected to the brewing cavity through the first channel; a moving valve core, the moving valve core being in sealed sliding fit with the first channel to form a pressure-boosting brewing state in the brewing cavity, the moving valve core being squeezed and slid into the second channel when the pressure in the brewing cavity reaches the pressure-boosting brewing pressure, and the moving valve core being in clearance fit with the second channel to form a pressure-maintaining brewing state in the brewing cavity.

[0007] In an embodiment of the present invention, a convex ring structure is provided in the first channel, the moving valve core includes a deformation part, and in the pressure-boosting brewing state, the deformation part abuts against one end of the convex ring structure close to the brewing cavity.

[0008] In an embodiment of the present invention, a pressure-bearing groove is provided at one end of the movable valve core close to the brewing chamber, and a wall body around the notch of the pressure-bearing groove forms the deformation part.

[0009] In an embodiment of the present invention, the inner diameter of the pressure-bearing groove is gradually increased from the end far away from the brewing chamber to the end close to the brewing chamber, and the thickness of the deformation part is gradually decreased from the end far away from the brewing chamber to the end close to the brewing chamber.

[0010] In an embodiment of the present invention, the movable valve core includes a valve body, and the valve body extends in a tapered shape from the end close to the brewing chamber to the end far away from the brewing chamber, and one end of the valve body close to the brewing chamber is connected to the deformation part.

[0011] In an embodiment of the present invention, an annular groove is provided in the second channel, the groove wall surface of the annular groove is in transitional connection with the convex ring structure, and the deformation part can slide along the convex ring structure into the annular groove under the action of the boosting brewing pressure.

[0012] In an embodiment of the present invention, the water outlet structure includes a water outlet pipe, the water outlet pipe is arranged at the bottom of the capsule body, the first channel and the second channel are arranged in the water outlet pipe, a support part is arranged at the water outlet end of the water outlet pipe, and at least one drainage hole is formed in the support part; in the holding pressure brewing state, the movable valve core is supported on the support part.

[0013] In an embodiment of the present invention, the number of the drainage holes is multiple, and the multiple drainage holes are arranged at intervals along the circumferential direction of the second channel and are arranged close to the inner side surface of the water outlet pipe.

[0014] In an embodiment of the present invention, the drainage hole includes a water inlet hole and a water outlet hole, the water outlet hole is communicated with the second channel through the water inlet hole, and the aperture of the water inlet hole is larger than the aperture of the water outlet hole.

[0015] In an embodiment of the present invention, a filter membrane covers the water inlet end of the water outlet pipe.

[0016] In an embodiment of the present invention, the pressure-brewing tea capsule further includes a shower head plate, the top of the capsule body has an opening, a step surface is provided below the opening, the shower head plate is installed on the step surface, and a plurality of spray holes communicated with the brewing chamber are arranged at intervals on the shower head plate.

[0017] In an embodiment of the present invention, the pressure-brewing tea capsule further includes a sealing film, and the sealing film covers the opening.

[0018] The features and advantages of the present invention are:

[0019] The pressure - assisted brewing tea capsule of the present invention can not only achieve the whole - process pressure - assisted brewing of the tea leaves in the brewing chamber, but also first form a pressure - increasing brewing state in the brewing chamber by the movable valve core sealingly slidingly cooperating with the first channel. When the pressure in the brewing chamber reaches the pressure - increasing brewing pressure, the movable valve core can be extruded and slide into the second channel under the action of the pressure - increasing brewing pressure. Since the movable valve core has a clearance fit with the second channel, the liquid can flow out from the clearance between the movable valve core and the second channel and the water inlet flow rate is greater than the water outlet flow rate, so that the pressure in the brewing chamber rapidly decreases but still maintains a certain pressure, thus forming a pressure - maintaining brewing state in the brewing chamber. Therefore, the present invention can achieve pressure - increasing brewing in the first half - stage and pressure - maintaining brewing in the second half - stage, and the pressure - maintaining brewing pressure is less than the pressure - increasing brewing pressure, which is more in line with the extraction characteristics of tea leaves. In the initial stage, the dry tea is not easy to soak open, and rapid soaking and waking - up of the tea are carried out through the pressure - increasing brewing pressure; after soaking open, rapid extraction is carried out through a slightly lower pressure - maintaining brewing pressure, so as to prevent the precipitation of bitter substances caused by continuous high pressure. Moreover, the structure of the present invention is simple, and only through the cooperation between the movable valve core and the capsule body can it achieve staged brewing in the first brewing and subsequent multiple pressure - assisted brews, and the first extraction pressure is greater than the subsequent extraction pressures. Thus, it is easy to control the brewing pressure by the movable valve core and / or the capsule body according to the different requirements of brewing parameters for different tea varieties, with better stability, lower processing requirements and lower manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the pressure - assisted brewing tea capsule of the present invention in the pressure - increasing brewing state.

[0022] Figure 2 It is a schematic structural diagram of the pressure - assisted brewing tea capsule of the present invention in the pressure - maintaining brewing state.

[0023] Figure 3 It is a curve graph of the first brewing of the high - pressure pressure - assisted brewing tea capsule of the present invention.

[0024] Figure 4 It is a curve graph of the first brewing of the medium - pressure pressure - assisted brewing tea capsule of the present invention.

[0025] Figure 5 It is a curve graph of the first brewing of the low - pressure pressure - assisted brewing tea capsule of the present invention.

[0026] Figure 6Curvature graph of the second brewing of the high-pressure pressure-brewing tea capsule of the present invention.

[0027] Figure 7 Curvature graph of the second brewing of the medium-pressure pressure-brewing tea capsule of the present invention.

[0028] Figure 8 Curvature graph of the second brewing of the low-pressure pressure-brewing tea capsule of the present invention.

[0029] Figure 9 Comparison graph of the evaluation scores of the brewing of the pressure-brewing tea capsule of the present invention and manual brewing.

[0030] Figure 10 Partial enlarged view of the pressure-brewing tea capsule of the present invention in the state of holding pressure for brewing.

[0031] Figure 11 Cross-sectional view of the moving valve core in the present invention.

[0032] Figure 12 Perspective view of the moving valve core in one perspective of the present invention.

[0033] Figure 13 Perspective view of the moving valve core in another perspective of the present invention.

[0034] Figure 14 Cross-sectional view of the capsule body in the present invention.

[0035] Figure 15 Perspective view of the capsule body in one perspective of the present invention.

[0036] Figure 16 Perspective view of the capsule body in another perspective of the present invention.

[0037] Figure 17 Top view of the shower head plate in the present invention.

[0038] Figure 18 Cross-sectional view of the shower head plate in the present invention.

[0039] In the figure:

[0040] 100, capsule body; 11, water outlet structure; 12, brewing chamber; 13, first channel; 14, second channel; 15, gap; 16, water outlet pipe; 17, convex ring structure; 18, annular groove; 19, support portion; 110, drain hole; 111, open end face; 112, stepped surface; 113, tea outlet nozzle; 200, moving valve core; 21, deformation portion; 22, pressure-bearing groove; 23, valve body; 300, filter membrane; 400, shower head plate; 41, spray hole; 500, sealing film. Detailed implementation mode

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

[0042] As Figure 1 and Figure 2 shown, the present invention provides a pressurized tea brewing capsule, including: a capsule body 100 having a brewing chamber 12 for accommodating the object to be brewed. The capsule body 100 is provided with a water outlet structure 11, and the water outlet structure 11 is provided with a first channel 13 and a second channel 14. The second channel 14 is connected to the brewing chamber 12 through the first channel 13; a movable valve core 200, which is in sealed sliding fit with the first channel 13 to form a pressurized brewing state in the brewing chamber 12. When the pressure in the brewing chamber 12 reaches the pressurized brewing pressure, the movable valve core 200 is squeezed and slides into the second channel 14, and the movable valve core 200 is in clearance fit with the second channel 14 to form a pressure-maintaining brewing state in the brewing chamber 12.

[0043] The pressurized tea brewing capsule of the present invention can not only realize the whole-process pressurized brewing of the tea leaves in the brewing chamber 12, but also first form a pressurized brewing state in the brewing chamber 12 by the sealed sliding fit of the movable valve core 200 with the first channel 13. When the pressure in the brewing chamber 12 reaches the pressurized brewing pressure, the movable valve core 200 can be squeezed and slide into the second channel 14 under the action of the pressurized brewing pressure. Since the movable valve core 200 is in clearance fit with the second channel 14, the liquid can flow out from the gap 15 between the movable valve core 200 and the second channel 14 and the water inlet flow rate is greater than the water outlet flow rate, so that the pressure in the brewing chamber 12 can still maintain a certain pressure after rapidly decreasing, thereby forming a pressure-maintaining brewing state in the brewing chamber 12. Therefore, when the pressurized tea brewing capsule of the present invention is brewed for the first time, it can realize pressurized brewing in the first half and pressure-maintaining brewing in the second half, and the pressure-maintaining brewing pressure is less than the pressurized brewing pressure, which conforms to the extraction characteristics of tea leaves. In the initial stage, the dry tea is not easy to be brewed, and rapid soaking and waking up of the tea are carried out through the pressurized brewing pressure; after being brewed, rapid extraction is carried out through a slightly lower pressure-maintaining brewing pressure to prevent the precipitation of bitter substances caused by continuous high pressure; and subsequent brewing can still be carried out under pressure, and the first extraction pressure is greater than the subsequent extraction pressures; and the structure is simple, and only through the cooperation between the movable valve core 200 and the capsule body 100, the first-stage brewing of the tea capsule and subsequent multiple pressurized brews can be realized, and it is easy to control the brewing pressure according to the different requirements of different tea varieties for brewing parameters, which is more stable, and has low requirements for processing and low manufacturing cost.

[0044] The materials of the movable valve core 200 include but are not limited to silica gel and TPU, and can also be other elastic plastic materials or the materials for manufacturing sealing rings in the prior art. By adjusting the hardness of the movable valve core 200, the outer diameter of the movable valve core 200, and / or the inner diameter of the first channel 13, the adjustment of the boosting brewing pressure can be achieved. That is, the greater the hardness of the movable valve core 200, the larger the outer diameter of the movable valve core 200, and / or the smaller the inner diameter of the first channel 13, the closer the fit between the movable valve core 200 and the first channel 13, the more difficult it is to be pushed, and the less likely the sealed state is to be broken, and the greater the boosting brewing pressure. On the contrary, the boosting brewing pressure is smaller. By adjusting the outer diameter of the movable valve core 200 and / or the inner diameter of the second channel 14, that is, adjusting the size of the gap 15 between the movable valve core 200 and the second channel 14, the adjustment of the holding brewing pressure can be achieved. That is, the smaller the gap 15 between the movable valve core 200 and the second channel 14, the smaller the water outlet flow rate in the holding brewing state, and the greater the holding brewing pressure. On the contrary, the holding brewing pressure is smaller.

[0045] As Figure 3 , Figure 4 and Figure 5 shown, in the embodiments of the present invention, the boosting brewing pressure is adjusted by the movable valve core 200 with different hardnesses. According to the magnitude of the boosting brewing pressure, the pressure - assisted brewing tea capsules are divided into high - pressure pressure - assisted brewing tea capsules, medium - pressure pressure - assisted brewing tea capsules, and low - pressure pressure - assisted brewing tea capsules. Specifically, the hardness of the movable valve core 200 of the high - pressure pressure - assisted brewing tea capsule is 60 degrees, which can make the boosting brewing pressure in the brewing chamber 12 about 5.5 bar; the hardness of the movable valve core 200 in the medium - pressure pressure - assisted brewing tea capsule is 50 degrees, which can make the boosting brewing pressure in the brewing chamber 12 about 4.5 bar; the hardness of the movable valve core 200 in the low - pressure pressure - assisted brewing tea capsule is 45 degrees, which can make the boosting brewing pressure in the brewing chamber 12 about 4 bar.

[0046] As Figure 3 , Figure 4 and Figure 5 shown, during the first brewing, the stage when the brewing chamber 12 rises from zero to the boosting brewing pressure is the boosting brewing stage, the stage when the brewing chamber 12 rapidly drops from the boosting brewing pressure to the holding brewing pressure is the breaking - through and pressure - reducing stage. After stopping the water supply to the brewing chamber 12, the brewing chamber 12 drops from the holding brewing pressure to zero. The total duration of the boosting brewing stage, the breaking - through and pressure - reducing stage, and the holding brewing stage is equal to the duration of the water supply to the capsule body 100. After stopping the water supply, the pressure in the brewing chamber 12 drops rapidly. Therefore, when the boosting brewing pressure is constant, the duration of the boosting brewing stage can be adjusted by adjusting the pressure and / or flow rate of the water supply to the capsule body 100, and further, the duration of the holding brewing stage can be adjusted by adjusting the total duration of the water supply to the tea capsule.

[0047] As Figure 6, Figure 7 and Figure 8 As shown in Figure 8 , when the pressure - assisted brewing tea capsule of the present invention is brewed for the second time, since the movable valve core 200 is still located in the second channel 14, and due to the existence of the gap 15 between the movable valve core 200 and the second channel 14, the water inlet flow rate is still greater than the water outlet flow rate. Therefore, the pressure in the brewing chamber 12 can still rapidly increase to form a brewing pressure, so that pressure - assisted brewing can still be achieved during the second brewing, thereby improving the extraction efficiency during the second brewing. Similarly, if the pressure - assisted brewing tea capsule of the present invention is brewed for the third time or more times, the pressure in the brewing chamber 12 can still rapidly increase to form a brewing pressure. Therefore, the pressure - assisted brewing tea capsule of the present invention not only forms a pressure - increasing brewing stage for rapid soaking and waking up the tea during the first brewing, and a pressure - maintaining brewing stage for rapid extraction and preventing the precipitation of bitter substances caused by continuous high pressure, but also can achieve multiple pressure - assisted brews, thereby improving the extraction efficiency of multiple brews.

[0048] Water - soluble substances in tea leaves leached by brewing are called water - extractable substances. The extraction rate can be compared by comparing the mass percentage of water - extractable substances within the same time, and the extraction efficiency of effective taste - presenting substances in the tea soup can be evaluated by evaluating the extraction rate of water - extractable substances.

[0049] In order to prove that the pressure - assisted brewing tea capsule of the present invention can improve the extraction rate of water - extractable substances from tea leaves, three brewing methods, namely, brewing with the high - pressure pressure - assisted brewing tea capsule of the present invention, brewing with the low - pressure pressure - assisted brewing tea capsule of the present invention, and manual brewing, are tested. Among them:

[0050] Test purpose: Under the same brewing conditions (uniform brewing time, tea variety and quality, brewing temperature and water volume), compare the mass fraction of water - extractable substances after two - stage pressure extraction and manual brewing to obtain the influence of pressure extraction and manual brewing on the extraction rate; compare the mass fraction of water - extractable substances of two - stage pressure extraction with high pressure and low pressure to obtain the influence of pressure magnitude on the extraction rate.

[0051] Test conditions: Green tea is selected for testing, the brewing time is 55 s, the brewing water temperature is 95 °C, and the brewing water volume is 200 ml.

[0052] Testing method: Select 3.5 g of green tea, weigh and record the exact mass of the green tea. Brew the green tea in three ways: low-pressure two-stage, high-pressure two-stage, and manual brewing. Take three parallel samples for each brewing method. Dry and weigh the tea residues after brewing each sample, and record the exact mass of the tea residues. Subtract the mass of the dry tea before brewing from the mass of the dried tea residues after brewing to obtain the mass of the water extract, and then calculate the mass percentage of the water extract in the dry tea before brewing. At this time, the mass percentages of the water extract under the same brewing conditions for the three brewing methods are obtained. By comparing the mass percentages of the water extract under the same brewing conditions, the leaching rates of water-soluble substances can be compared. The calculation formula can refer to "GB / T8305-2013 Testing of Tea Water Extract".

[0053] The test results are shown in the following table:

[0054]

[0055] Based on the above table, the test conclusion can be drawn: For high-pressure extraction with a pressure-brewing tea capsule under high pressure and low-pressure extraction with a pressure-brewing tea capsule under low pressure, the extraction rates of both are significantly higher than that of manual brewing. Among them, the mass percentage of the extract obtained by high-pressure extraction is 18.4%, and the extraction rate is 76.2% higher than that of manual brewing; from the comparison between the pressure-brewing tea capsule under high pressure and the pressure-brewing tea capsule under low pressure, it can be seen that the extraction efficiency of the former is significantly higher than that of the latter. Among them, the mass percentage of the extract obtained by high-pressure extraction is 18.4%, and the mass percentage of the extract obtained by low-pressure extraction is 16.1%; thus, it can be seen that using the pressure-brewing tea capsule of the present invention to extract tea can greatly improve the extraction rate compared with manual brewing, and can achieve rapid extraction of tea, improving the problem of long time-consuming manual brewing.

[0056] In addition, in order to prove that the pressure-brewing tea capsule of the present invention can improve the taste of the tea soup, the following six kinds of tea are brewed by using the pressure-brewing tea capsule of the present invention and manual brewing respectively to obtain the brewed tea soup. Conduct sensory evaluation and scoring on each tea soup, and compare the quality of the tea soup extracted by the two brewing methods to judge which method is better. When brewing the same tea by the two brewing methods, keep the brewing conditions the same (the same brewing temperature, brewing time, tea weight, brewing water volume) to make the sensory evaluation of the tea soup comparable. The evaluation criteria are based on the standards of tea soup color, aroma, and taste in "GB / T23776-2018 Method for Sensory Evaluation of Tea".

[0057] Among them, different types of pressure-brewing tea capsules are selected for brewing according to the requirements of different tea varieties, as shown in the following table:

[0058]

[0059] The test results are shown in the following table:

[0060]

[0061] Combined with the above table and Figure 9 the columnar comparison chart of the evaluation scores shown, it can be seen that the pressure-brewed tea capsules of the present invention have better sensory evaluation scores for the tea soups brewed from various types of tea leaves than manual brewing.

[0062] As Figure 10 shown, in the embodiment of the present invention, the water outlet structure 11 includes a water outlet pipe 16, the water outlet pipe 16 is provided at the bottom of the capsule body 100, and the first channel 13 and the second channel 14 are provided in the water outlet pipe 16. A filter membrane 300 covers the water inlet end of the water outlet pipe 16. A support portion 19 is provided at the water outlet end of the water outlet pipe 16 for supporting the moving valve core 200 in the pressure-holding brewing state. A drain hole 110 for discharging the tea liquid in the water outlet pipe 16 is provided on the support portion 19. The water outlet structure 11 further includes a tea outlet nozzle 113, and the water flowing out from the drain hole 110 converges through the tea outlet nozzle 113 and then flows into the tea set below. Specifically, the water outlet pipe 16 is generally a hollow cylindrical structure with an open top end. The filter membrane 300 is made of filter paper or non-woven fabric, and the tea soup in the brewing cavity 12 flows into the water outlet pipe 16 after being filtered by the filter membrane 300. The filter membrane 300 is fixed on the end face of the water inlet end of the water outlet pipe 16 by ultrasonic welding or thermal welding.

[0063] As Figure 10 shown, the drain hole 110 includes a communicating water inlet hole and a water outlet hole. The water inlet hole is communicated with the second channel 14, and the aperture of the water inlet hole is larger than that of the water outlet hole. By setting a water inlet hole with a larger aperture and a water outlet hole with a smaller aperture, it not only ensures that the tea soup in the second channel 14 can flow in from the water inlet hole, but also controls a smaller water outlet flow rate so that the water outlet flow rate is less than the water inlet flow rate, and at the same time, it can also prevent the tea soup from splashing.

[0064] As Figure 10 shown, in the embodiment of the present invention, a convex ring structure 17 is provided in the first channel 13, and the moving valve core 200 includes a deformation portion 21. In the pressure-boosting brewing state, the deformation portion 21 abuts against one end of the convex ring structure 17 close to the brewing cavity 12, that is Figure 10Above the convex ring structure 17 shown. By providing the convex ring structure 17, on the one hand, the convex ring structure 17 functions as a sealing ring. The hard material of the convex ring structure 17 cooperates with the soft material such as the moving valve core 200, one hard and one soft, so as to ensure the reliability of the seal between the moving valve core 200 and the first channel 13 in the boost brewing state. On the other hand, the convex ring structure 17 cooperates with the deformation part 21, which is beneficial for the deformation part 21 of the moving valve core 200 to slide along the surface of the convex ring structure 17 and move into the lower second channel 14 when the pressure in the brewing chamber 12 reaches the boost brewing pressure. In addition, the surface of the convex ring structure 17 is an arc surface. On the one hand, it is more beneficial for the deformation part 21 of the moving valve core 200 to slide along the smooth arc surface. On the other hand, since the convex ring structure 17 is located on the inner side of the water outlet pipe 16, the strong ejection method is adopted in production and manufacturing to realize demolding. The smooth arc surface shape of the convex ring structure 17 is beneficial for the part of the mold used for the formation of the water outlet pipe 16 to be ejected from the water outlet pipe 16. Optionally, the end face of the convex ring structure near the brewing chamber can also be a tapered surface with a gradually shrinking setting. Optionally, the convex ring structure is not provided, and the seal is achieved only through the interference fit between the deformation part and the first channel.

[0065] As Figure 10 and Figure 11 shown, in the embodiment of the present invention, a pressure-bearing groove 22 is provided at one end of the moving valve core 200 close to the brewing chamber 12, and the wall body around the notch of the pressure-bearing groove 22 forms a deformation part 21. By providing the pressure-bearing groove 22, on the one hand, the deformation ability of the deformation part 21 can be improved, so that the deformation part 21 can contract and deform into the pressure-bearing groove 22, and then can slide smoothly into the lower second channel 14 under the push of the water flow. On the other hand, the water flow can be accumulated in the pressure-bearing groove 22, so as to better use the liquid in the pressure-bearing groove 22 to push the moving valve core 200 to move.

[0066] As Figure 10 and Figure 11 shown, the inner diameter of the pressure-bearing groove 22 is gradually increased from the end far from the brewing chamber 12 to the end close to the brewing chamber 12, and the thickness of the deformation part 21 is gradually decreased from the end far from the brewing chamber 12 to the end close to the brewing chamber 12, so that the edge part of the deformation part 21 is thinner, thus having better deformation ability. Specifically, the deformation part 21 is generally in a horn shape.

[0067] As Figure 10 , Figure 12 and Figure 13As shown, the movable valve core 200 includes a valve body 23, which extends in a tapered shape from the end close to the brewing chamber 12 to the end far from the brewing chamber 12. The end of the valve body 23 close to the brewing chamber 12 is connected to the deformation part 21. After the movable valve core 200 slides into the second channel 14, even if it is offset, there is a gap 15 between the end far from the brewing chamber 12, that is, the end supported on the support part 19, and the second channel 14 in the circumferential direction, without blocking the drain hole 110, ensuring that the liquid can be discharged from the drain hole 110. Specifically, the valve body 23 is generally in the shape of a frustum of a cone with a taper. In the state of boosting and brewing, the end of the valve body 23 far from the brewing chamber 12 can abut against the inner side of the convex ring structure 17.

[0068] As Figure 10 shown, in an embodiment of the present invention, an annular groove 18 is provided in the second channel 14. The groove wall surface of the annular groove 18 is connected to the convex ring structure 17 in a transitional manner. The deformation part 21 can slide along the convex ring structure 17 into the annular groove 18 under the action of the boosting and brewing pressure. By providing the annular groove 18 to accommodate the deformation part 21, there is a gap between the deformation part 21 and the annular groove 18.

[0069] As Figure 14 、 Figure 15 and Figure 16 shown, the material of the capsule body 100 includes but is not limited to plastic and is integrally formed by injection molding. The capsule body 100 is generally in the shape of a circular cup body with a circular tube structure in the center of the inner bottom surface. This circular tube structure constitutes the water outlet pipe 16. A frustum of a cone structure vertically extends from the center of the inner bottom surface of the capsule body 100 to form the support part 19. A circular groove structure is provided at the position of the outer bottom surface of the capsule body 100 corresponding to the frustum of a cone structure. This circular groove constitutes the tea outlet 113. By providing the frustum of a cone structure, the wall thickness at this circular groove is close to the overall wall thickness of the bottom of the capsule body 100, and the structure is more stable. A circular tube structure vertically extends from the center of the frustum of a cone structure to form the water outlet pipe 16. An inner convex ring structure 17 is formed by inward protrusion at the inner side surface of the water outlet pipe 16 near the water inlet end of the water outlet pipe 16. The annular convex arc surface of the convex ring structure 17 is closely attached to the outer side surface of the deformation part 21, thus playing a role in sealing the water outlet structure 11. The central axis of the convex ring structure 17 is collinear with the central axis of the water outlet pipe 16.

[0070] As Figure 15 and Figure 16 shown, the number of the drain holes 110 is multiple. The multiple drain holes 110 are arranged at intervals along the circumferential direction of the second channel 14 and are close to the edge of the second channel 14, so that the drain holes 110 correspond to the gap 15 between the second channel 14 and the movable valve core 200, avoiding the drain holes 110 being blocked by the movable valve core 200 and causing the tea soup in the second channel 14 to not be smoothly discharged from the drain holes 110.

[0071] As Figure 1 , Figure 17 and Figure 18 shown, in an embodiment of the present invention, the pressurized tea brewing capsule further includes a shower tray 400. A plurality of spray holes 41 are arranged at intervals on the shower tray 400. An opening is provided at the top of the capsule body 100, and a stepped surface 112 is provided below the opening. The shower tray 400 is installed on the stepped surface 112. As Figure 1 shown, the pressurized tea brewing capsule further includes a sealing film 500. The sealing film 500 covers the opening at the top of the capsule body 100. Specifically, the sealing film 500 is made of an aluminum foil composite material. After the shower tray 400 is installed on the stepped surface 112, it is directly heat-sealed on the opening end surface 111 around the opening at the top of the capsule body 100, so as to form a sealed space inside the capsule body 100. The shower tray 400 is generally in the structure of a disc with a plurality of conical holes and is integrally formed by injection molding. The conical holes constitute the spray holes 41. After the puncturing needle of the brewing machine punctures the sealing film 500, drinking water is injected above the shower tray 400, and then the drinking water is sprayed onto the tea leaves in the brewing chamber 12 through the spray holes 41 on the shower tray 400. By designing the spray holes 41 to be conical, on the one hand, it is convenient for production demolding; on the other hand, it is easier to spray the water in a diffused state into the brewing chamber 12, so that the tea leaves in the brewing chamber 12 can be quickly and comprehensively sprayed, improving the extraction efficiency.

[0072] The specific process of brewing is as follows: After the water outlet pipe 16 of the brewing machine punctures the sealing film 500, the water flows into the capsule body 100 and is sprayed out from the spray holes 41 on the shower tray 400, and is sprayed onto the tea leaves in the brewing chamber 12 to soak the tea leaves comprehensively and quickly. As the water inflow increases, the pressure in the brewing chamber 12 gradually increases, and the pressure received by the moving valve core 200 also increases accordingly. When the pressure increases to the set critical value, that is, the boosting brewing pressure, the boosting brewing stage ends. At the same time, under the pressure of the water flow continuously entering the first channel 13, the moving valve core 200 quickly slides over the convex ring structure 17 and enters the lower second channel 14. Since there is a gap 15 between the moving valve core 200 and the second channel 14, the sealing state of the water outlet structure 11 is broken, and the water inflow is greater than the water outflow. The rapid decrease in the water flow rate causes the pressure in the brewing chamber 12 to quickly decrease to the holding pressure brewing pressure, thus entering the holding pressure brewing stage. At this time, the brewed tea soup in the brewing chamber 12 passes through the filter membrane 300 above the moving valve core 200 and enters the first channel 13, and then sequentially flows out from the drain hole 110 along the first channel 13 and the gap 15 between the moving valve core 200 and the second channel 14, and finally flows into the tea set placed below under the gathering action of the tea outlet nozzle 113.

[0073] The above are only several embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention based on the content disclosed in the application documents.

Claims

1. A pressurized brewing tea capsule, characterized in that, Comprising: A capsule body having a brewing chamber for accommodating the substance to be brewed. The capsule body is provided with a water outlet structure, and the water outlet structure is provided with a first channel and a second channel. The second channel is communicated with the brewing chamber through the first channel. Wherein, a convex ring structure is provided in the first channel, and an annular groove is provided in the second channel; A movable valve core, one end thereof close to the brewing chamber is provided with a pressure-bearing groove, and the wall body around the notch of the pressure-bearing groove forms a deformation part. The movable valve core is in sealing sliding fit with the first channel to form a pressure-boosting brewing state in the brewing chamber. The deformation part slides from the convex ring structure to the annular groove under the state that the pressure in the brewing chamber reaches the pressure-boosting brewing pressure. The movable valve core is in clearance fit with the second channel to form a pressure-maintaining brewing state in the brewing chamber.

2. The pressure-brewing tea capsule according to claim 1, wherein In the pressure-boosting brewing state, the deformation part abuts against one end of the convex ring structure close to the brewing chamber.

3. The pressure-brewing tea capsule according to claim 1, wherein The inner diameter of the pressure-bearing groove is gradually increased from the end far from the brewing chamber to the end close to the brewing chamber, and the thickness of the deformation part is gradually decreased from the end far from the brewing chamber to the end close to the brewing chamber.

4. The pressure-brewing tea capsule according to claim 2, wherein The movable valve core comprises a valve body, and the valve body extends in a tapered shape from the end close to the brewing chamber to the end far from the brewing chamber, and one end of the valve body close to the brewing chamber is connected to the deformation part.

5. The pressure-brewing tea capsule according to claim 1, wherein The groove wall surface of the annular groove is in transitional connection with the convex ring structure.

6. The pressure-brewing tea capsule according to claim 1, wherein The water outlet structure comprises a water outlet pipe, the water outlet pipe is arranged at the bottom of the capsule body, the first channel and the second channel are arranged in the water outlet pipe, a support part is arranged at the water outlet end of the water outlet pipe, and at least one drain hole is formed in the support part; In the pressure-maintaining brewing state, the movable valve core is supported on the support part.

7. The pressure-brewing tea capsule according to claim 6, wherein The number of the drain holes is multiple, and the multiple drain holes are arranged at intervals along the circumferential direction of the second channel and are arranged close to the inner side surface of the water outlet pipe.

8. The pressure-brewing tea capsule according to claim 6, wherein The drain hole comprises a water inlet hole and a water outlet hole, the water outlet hole is communicated with the second channel through the water inlet hole, and the aperture of the water inlet hole is larger than the aperture of the water outlet hole.

9. The pressure-brewing tea capsule according to claim 6, wherein The water inlet end of the water outlet pipe is covered with a filter membrane.

10. The pressure-brewing tea capsule according to claim 1, wherein The pressure-brewing tea capsule further includes a shower head plate. The top of the capsule body has an opening, and a stepped surface is provided below the opening. The shower head plate is mounted on the stepped surface, and a plurality of spray holes communicating with the brewing chamber are arranged at intervals on the shower head plate.

11. The pressure-brewing tea capsule according to claim 10, wherein the pressure-brewing tea capsule further includes a sealing film, and the sealing film covers the opening.

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