Automatic tea brewing can

Abstract

The present invention discloses an automatic tea brewing canister, which includes a canister body and a brewing structure, wherein the canister body has a accommodating cavity for holding tea leaves, and the canister body is provided with a water inlet puncture area and a tea outlet puncture area; the brewing structure is located in the accommodating cavity, and the brewing structure divides the accommodating cavity into a brewing cavity and a tea discharge cavity, and the tea discharge cavity is located within the brewing structure, and the brewing structure includes a brewing bracket and a pressure valve core located within the tea discharge cavity, and the brewing bracket has a plurality of tea filtering holes, and the brewing cavity is connected to the tea discharge cavity through the plurality of tea filtering holes; wherein the water inlet puncture area is opposite to the brewing cavity, and the tea discharge puncture area is opposite to the tea discharge cavity. The automatic tea brewing canister can not only achieve high-barrier fresh-keeping storage of tea leaves, but also can complete pressure brewing of tea leaves in a small aluminum canister, without the need to open the small aluminum canister to pour the tea leaves into the tea set, and is easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of tea brewing equipment, in particular to an automatic tea brewing can. Background Art

[0002] Tea canned in small aluminum cans is not only aesthetically pleasing, but also extends its shelf life due to the cans' excellent barrier properties. Currently, a wide variety of small aluminum cans are commonplace on the market. However, these cans serve only as containers for the tea, requiring the can to be opened and poured into the teapot for brewing, a cumbersome process. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic tea brewing can, which can not only realize high-barrier preservation and storage of tea, but also can complete pressure brewing of tea in a small aluminum can, without opening the small aluminum can to pour the tea into a tea set, and is easy to operate.

[0004] The above-mentioned implementation objectives of the present invention are mainly achieved by the following technical solutions:

[0005] An automatic tea brewing can comprising:

[0006] The can body has a receiving cavity for holding tea leaves, and is provided with a water inlet puncture area and a tea outlet puncture area;

[0007] The brewing structure is located in the accommodating cavity, and the brewing structure divides the accommodating cavity into a brewing cavity and a tea discharge cavity. The tea discharge cavity is located in the brewing structure. The brewing structure includes a brewing bracket and a pressure valve core located in the tea discharge cavity. The brewing bracket has multiple tea filtering holes, and the brewing cavity is connected to the tea discharge cavity through the multiple tea filtering holes; wherein, the water inlet puncture area is opposite to the brewing cavity, and the tea outlet puncture area is opposite to the tea discharge cavity.

[0008] In a preferred embodiment of the present invention, when the water inlet puncture area is punctured, boiling water can be injected into the brewing chamber through the water inlet puncture area; when the tea outlet puncture area is punctured, the tea in the tea discharge chamber can be discharged from the tank body through the tea outlet puncture area.

[0009] In a preferred embodiment of the present invention, the pressure valve core has a valve core body and a valve ball movably arranged in the valve core body, wherein the valve ball has a tea discharge state that moves from a first position in the valve core body to a second position in the valve core body under at least one level of brewing pressure.

[0010] In a preferred embodiment of the present invention, the valve core body has a first cavity and a second cavity that are connected to each other, the second cavity is connected to the plurality of tea filtering holes through the first cavity, and a necking section is formed at the connection between the first cavity and the second cavity. When the liquid inlet pressure in the tea discharge cavity is greater than or equal to the first-level brewing pressure, the valve ball is in the first position against the necking section, and can be in the second position of breaking through the necking section and entering the second cavity under the continuous action of the first-level brewing pressure.

[0011] In a preferred embodiment of the present invention, when the liquid inlet height in the brewing chamber is greater than the liquid inlet height in the tea discharge chamber, the valve ball has a sealing state at the liquid inlet end of the valve core body.

[0012] In a preferred embodiment of the present invention, the valve core body has a first cavity and a second cavity that are connected to each other, and the second cavity is connected to the multiple tea filtering holes through the first cavity; the first cavity includes a trumpet-shaped through hole and a spherical through hole that are connected to each other, the trumpet-shaped through hole is connected to the multiple tea filtering holes and its inner diameter is smaller than the diameter of the valve ball, the spherical through hole is connected to the second cavity and its inner diameter is larger than the diameter of the valve ball, and when the valve ball is in the sealed state, the valve ball is sealed and abutted against the trumpet-shaped through hole.

[0013] In a preferred embodiment of the present invention, the can body is a hollow structure with an opening at the top, a sealing membrane is provided at the top opening, and the water inlet puncture area and the tea outlet puncture area are both located on the sealing membrane.

[0014] In a preferred embodiment of the present invention, the brewing bracket divides the tea discharge chamber into an upper chamber and a lower chamber through an internal boss, a plurality of tea filtering holes are connected to the lower chamber, the pressure valve core is located in the upper chamber, and the internal boss has a tea inlet connecting the lower chamber and the upper chamber, and the tea inlet is connected to the liquid inlet of the pressure valve core.

[0015] In a preferred embodiment of the present invention, the brewing structure also includes a tea dispensing tray, which can extend into the brewing bracket and press against the pressure valve core. The tea dispensing tray is provided with a tea discharge hole, which is connected to the liquid outlet of the pressure valve core.

[0016] In a preferred embodiment of the present invention, the total flow area of ​​the tea inlet is larger than the total flow area of ​​the tea discharge holes.

[0017] In a preferred embodiment of the present invention, a filter membrane is provided at the tea inlet, and the filter membrane is connected to the side of the internal boss close to the lower chamber.

[0018] In a preferred embodiment of the present invention, a base is provided at the bottom end of the brewing support, and the base is connected to the bottom wall of the accommodating cavity of the tank body.

[0019] In a preferred embodiment of the present invention, a sealing ring is provided between the pressure valve core and the brewing support.

[0020] In a preferred embodiment of the present invention, the pressure valve core and / or the necking section are made of elastic plastic material.

[0021] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0022] 1. The present invention forms a water inlet puncture area and a tea outlet puncture area on the sealing film through the sealing of the sealing film, the can body and the tea discharging tray. Boiling water enters the tea can through the water inlet puncture area, and pressure brewing is achieved inside the tea can. The brewed tea is poured out through the tea outlet puncture area. This method of brewing directly inside the tea can avoids the trouble of opening the small aluminum can and pouring the tea into the tea set when brewing tea, and the operation is simple.

[0023] 2. The present invention realizes high-barrier fresh-keeping storage of tea leaves through the sealing of the can body and the sealing film, thereby ensuring that the tea leaves have high quality.

[0024] 3. The present invention can realize pressurized brewing of tea leaves inside the tank body by arranging a pressure valve core inside the tank body, so that the brewed tea has a better taste.

[0025] 4. The brewing pressure of the present invention is adjustable; by adjusting the diameter of the valve ball or the hardness of the valve core body, the brewing pressure inside the tank can be adjusted to meet the different requirements of different tea categories for brewing parameters, and the present invention can realize multiple pressure brewing of tea. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0027] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the tea can of the present invention;

[0028] Figure 2 A top view of the tea caddy of the present invention;

[0029] Figure 3It is a structural schematic diagram of the tank body of the present invention;

[0030] Figure 4 Schematic diagram of the cross-sectional structure of the tank body of the present invention;

[0031] Figure 5 This is a schematic structural diagram of the brewing support of the present invention;

[0032] Figure 6 This is a schematic diagram of the cross-sectional structure of the brewing support of the present invention;

[0033] Figure 7 This is a structural diagram of the pressure valve core of the present invention;

[0034] Figure 8 This is a schematic diagram of the first state of the valve ball according to the present invention;

[0035] Figure 9 This is a schematic diagram of the second state of the valve ball according to the present invention;

[0036] Figure 10 This is a schematic diagram of the valve ball in the third state of the present invention;

[0037] Figure 11 This is a structural schematic diagram of the tea tray of the present invention;

[0038] Figure 12 The figure is a schematic cross-sectional view of the tea dispensing tray of the present invention.

[0039] Description of Figure Numbers:

[0040] 10. Tank body; 11. Accommodating cavity; 12. Brewing cavity; 13. Tea discharge cavity; 14. Water inlet puncture area; 15. Tea discharge puncture area; 20. Brewing structure; 21. Brewing bracket; 211. Tea filter hole; 212. Internal boss; 213. Upper chamber; 214. Lower chamber; 215. Tea inlet; 216. Base; 22. Pressure valve core; 221. Valve core body; 222. Valve ball; 223. First cavity; 2231. Trumpet-shaped through hole; 2232. Spherical through hole; 224. Second cavity; 225. Narrowing section; 23. Liquid inlet; 24. Liquid outlet; 30. Tea discharge tray; 31. Tea discharge hole; 32. Upper seat; 40. Filter membrane; 50. Sealing ring; 60. Sealing membrane. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0042] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] like Figures 1 to 4 As shown, the present invention provides an automatic tea brewing can, which includes a can body 10 and a brewing structure 20, wherein:

[0045] The can body 10 has a receiving cavity 11 for holding tea leaves, and is provided with a water inlet puncture area 14 and a tea outlet puncture area 15;

[0046] The brewing structure 20 is located in the accommodating chamber 11, and the brewing structure 20 divides the accommodating chamber 11 into a brewing chamber 12 and a tea discharge chamber 13. The tea discharge chamber 13 is located in the brewing structure 20. The brewing structure 20 includes a brewing bracket 21 and a pressure valve core 22 located in the tea discharge chamber 13. The brewing bracket 21 has multiple tea filtering holes 211, and the brewing chamber 12 is connected to the tea discharge chamber 13 through the multiple tea filtering holes 211; wherein, the water inlet puncture area 14 is opposite to the brewing chamber 12, and the tea outlet puncture area 15 is opposite to the tea discharge chamber 13.

[0047] When the present invention is in use, when the water inlet puncture area 14 is punctured, the water can be injected into the brewing chamber 12 through the water inlet puncture area 14; when the tea outlet puncture area 15 is punctured, the tea in the tea discharge chamber 13 can be discharged from the tank body 10 through the tea outlet puncture area 15.

[0048] By arranging a water inlet puncture area 14 and a tea outlet puncture area 15 on the tank body 10, water is injected into the tank body 10 through the water inlet puncture area 14, and the tea leaves are brewed under pressure inside the tank body 10. The brewed tea flows out through the tea outlet puncture area 15. This method of brewing tea directly inside the tank body 10 avoids the trouble of opening the tea can and pouring the tea into the tea set when brewing tea, thereby simplifying the tea brewing process.

[0049] Specifically, such as Figure 3 and Figure 4 As shown, in this embodiment, the can body 10 is a hollow cylindrical structure with an open top. The can body 10 is a common aluminum can. The inner and outer surfaces of the can body 10 are oxidized. The interior of the can body 10 is coated with a food-grade PP film. A receiving cavity 11 is formed therein. A brewing structure 20 is provided inside the receiving cavity 11, and tea leaves for brewing are placed therein. Figure 2 As shown, the water inlet puncture area 14 and the tea outlet puncture area are located on the upper end surface of the tank body 10. In this embodiment, a sealing film 60 is provided at the top opening of the tank body 10, and the water inlet puncture area 14 and the tea outlet puncture area 15 are both located on the sealing film 60. When brewing tea, the sealing films 60 corresponding to the water inlet puncture area 14 and the tea outlet puncture area 15 are punctured respectively, and the water is injected from the sealing film 60 corresponding to the water inlet puncture area 14, passes through the brewing structure 20 inside the tank body 10, and then flows out from the sealing film 60 corresponding to the tea outlet puncture area 15.

[0050] like Figure 1 As shown, the brewing structure 20 is fixedly connected to the inner bottom surface of the tank body 10. The brewing structure 20 is an overall columnar structure, which includes a brewing bracket 21 connected to the bottom surface of the tank body 10 and a pressure valve core 22 located inside the brewing bracket 21. In this embodiment, the brewing structure 20 is located in the center of the tank body 10. A circular columnar brewing chamber 12 is formed between the brewing structure 20 and the tank body 10. Tea leaves can be placed in the brewing chamber 12. Of course, in other embodiments, other substances to be brewed, such as coffee particles, can be placed in the brewing chamber 12, which is not limited here.

[0051] like Figure 1 、 Figure 5 and Figure 6As shown, the brewing bracket 21 is made of plastic and is formed in one piece through an injection molding process. A columnar tea discharge chamber 13 is formed inside the brewing bracket 21. A plurality of tea filtering holes 211 are provided on the side wall of the brewing bracket 21. The plurality of tea filtering holes 211 connect the brewing chamber 12 and the tea discharge chamber 13. Tea soaked in tea leaves can flow from the brewing chamber 12 into the tea discharge chamber 13 through the tea filtering holes 211. In this embodiment, an annular base 216 is formed at the bottom of the brewing bracket 21. The base 216 can be fixed to the bottom end surface of the tank body 10 by ultrasonic welding. The base 216 increases the stability of the connection between the brewing bracket 21 and the tank body 10.

[0052] In a preferred embodiment of the present invention, Figure 1 As shown, the brewing structure 20 also includes a tea dispensing tray 30, which can extend into the brewing bracket 21 and press against the pressure valve core 22. The tea dispensing tray 30 is provided with a tea discharge hole 31, which is connected to the liquid outlet 24 of the pressure valve core 22.

[0053] The tea dispensing tray 30 is located at the upper part of the brewing bracket 21 and is connected to the brewing bracket 21. The tea dispensing tray 30 can serve as a support for the filter membrane 40 and is fixedly connected to the filter membrane 40 to form a tea dispensing puncture area 15. The tea passing through the inside of the brewing bracket 21 flows out through the tea dispensing puncture area 15 formed by the filter membrane 40 on the upper part of the tea dispensing tray 30.

[0054] Specifically, such as Figure 11 and Figure 12 As shown, the tea discharging tray 30 is a columnar structure with an open top, which is formed by injection molding. The main structure of the tea discharging tray 30 is located at the upper part of the tea discharging cavity 13 inside the brewing bracket 21. A tea discharging hole 31 is provided at the bottom of the tea discharging tray 30, which is connected with the tea discharging cavity 13. The tea entering the tea discharging cavity 13 can flow out through the tea discharging hole 31. An annular upper seat 32 is formed at the upper edge of the tea discharging tray 30. When the tea discharging tray 30 is placed in the brewing bracket 21, the upper seat 32 abuts against the top of the brewing bracket 21. The tea discharging tray 30 can be fixed to the top of the brewing bracket 21 by ultrasonic welding, and the setting of the upper seat 32 is also convenient for abutting against the sealing film 60, which is beneficial to separate the water inlet puncture area 14 and the tea discharging puncture area 15.

[0055] Further, such as Figure 1 As shown, in this embodiment, the upper plane of the upper seat 32 of the tea tray 30 connected to the top of the brewing bracket 21 is flush with the top edge plane of the can body 10, and the sealing film 60 is heat-sealed on the can body 10 and the tea tray 30 at the same time. Figure 2 As shown, the sealing film 60 forms a tea-discharging puncture area 15 in the inner circular area of ​​the tea-discharging tray 30 , and the sealing film 60 forms a water-inlet puncture area 14 in the annular area between the can body 10 and the tea-discharging tray 30 .

[0056] In a preferred embodiment of the present invention, Figure 1 and Figure 6 As shown, the brewing bracket 21 divides the tea discharge chamber 13 into an upper chamber 213 and a lower chamber 214 through an internal boss 212, and multiple tea filtering holes 211 are connected to the lower chamber 214. The pressure valve core 22 is located in the upper chamber 213, and the internal boss 212 has a tea inlet 215 connecting the lower chamber 214 and the upper chamber 213. The tea inlet 215 is connected to the liquid inlet 23 of the pressure valve core 22.

[0057] The lower chamber 214 is provided with a plurality of tea filter holes 211 to perform preliminary filtering on the tea flowing from the brewing chamber 12 into the tea discharge chamber 13, preventing soaked tea leaves from entering the tea discharge chamber 13 and thereby clogging it. An internal boss 212 is provided to support and limit the pressure valve core 22. Specifically, the wall surface of the lower chamber 214 is provided with a plurality of tea filter holes 211, which connect the brewing chamber 12 with the lower chamber 214. The tea in the brewing chamber 12 enters the lower chamber 214 through the tea filter holes 211, and then enters the pressure valve core 22 of the upper chamber 213 through the tea inlet 215 on the internal boss 212.

[0058] In a preferred embodiment of the present invention, the total flow area of ​​the tea inlet 215 on the internal boss 212 is greater than the total flow area of ​​the tea discharge hole 31 on the tea outlet tray 30; the difference in flow area between the tea inlet 215 and the tea discharge hole 31 can further increase the brewing pressure inside the brewing chamber 12.

[0059] In a preferred embodiment of the present invention, Figure 1 、 Figures 8 to 10 As shown, the pressure valve core 22 has a valve core body 221 and a valve ball 222 movably arranged in the valve core body 221, the valve core body 221 has a first cavity 223 and a second cavity 224 that are connected to each other, the second cavity 224 is connected to the multiple tea filtering holes 211 through the first cavity 223, and a necking section 225 is formed at the connection between the first cavity 223 and the second cavity 224. When the liquid inlet pressure in the tea discharge chamber 13 is greater than or equal to the first-level brewing pressure, the valve ball 222 is in a first position against the necking section 225, and can be in a second position of breaking through the necking section 225 and entering the second cavity 224 under the continuous action of the first-level brewing pressure.

[0060] A pressure valve core 22 is arranged inside the brewing bracket 21. The multi-section structure of the valve core body 221 of the pressure valve core 22 and the valve ball 222 moving in the valve core body 221 can realize the pressurized brewing of tea inside the tank body 10, so that the brewed tea has a better taste.

[0061] Specifically, when the tea canister of the present invention is brewed for the first time, as the amount of water inside the canister 10 increases, the water level outside the brewing bracket 21 is higher than the water level inside the brewing bracket 21, causing the water level inside the brewing bracket 21 to be pressurized and the valve ball 222 in the pressure valve core 22 to be lifted to a position where it fits the bottom edge of the constricted section 225. Figure 9 As shown, at this time, the liquid inlet pressure in the tea discharge chamber 13 is greater than or equal to the first-level brewing pressure, and the valve ball 222 is in the first position against the constricted section 225, as shown in FIG. Figure 9 As shown; as the amount of water continues to accumulate, the water level in the brewing bracket 21 is increasingly affected by the external water level pressure, and the pressure of the valve ball 222 on the bottom edge of the necking section 225 increases until the valve ball 222 is forcibly squeezed into the second cavity 224 from the necking section 225, as shown Figure 10 As shown, valve ball 222 is now located in the second position of second cavity 224. In the present invention, valve ball 222 is made of a rigid material with a density greater than water, so it will not float when brewed with water or deform under pressure, thereby failing to meet its corresponding functions. In this embodiment, valve ball 222 can be made of stainless steel, glass, or ceramic.

[0062] In a preferred embodiment of the present invention, Figure 1 and Figure 8 As shown, the first cavity 223 includes a trumpet-shaped through hole 2231 and a spherical through hole 2232 that are connected to each other. The trumpet-shaped through hole 2231 is connected to multiple tea filter holes 211 and its inner diameter is smaller than the diameter of the valve ball 222. The spherical through hole 2232 is connected to the second cavity 224 and its inner diameter is larger than the diameter of the valve ball 222. When the valve ball 222 is in a sealed state, the valve ball 222 is sealed and abutted against the trumpet-shaped through hole 2231.

[0063] The cooperation between the trumpet-shaped through hole 2231 and the valve ball 222 can seal the interior of the tea can when no tea is brewed. The spherical through hole 2232 can facilitate the up and down movement of the valve ball 222 in the first cavity 223 .

[0064] Specifically, the trumpet-shaped through hole 2231 is located at the lower part of the spherical through hole 2232, and the two are connected. The trumpet-shaped through hole 2231 is a tapered through hole structure with a small bottom and a large bottom. The valve ball 222 can enter the trumpet-shaped through hole 2231 without falling. When brewing is not in progress, the valve ball 222 is in the trumpet-shaped through hole 2231 of the first cavity 223 due to its own gravity. Figure 8 As shown, at this time, the valve ball 222 is in contact with the surrounding side walls of the trumpet-shaped through hole 2231 to achieve sealing of the entire tea can.

[0065] According to one embodiment of the present invention, Figure 1As shown, a filter membrane 40 is provided at the tea inlet 215 of the brewing support 21. The filter membrane 40 is connected to the side of the internal boss 212 near the lower chamber 214. The provision of the filter membrane 40 can prevent tea fragments that pass through the tea filter hole 211 from entering the pressure valve core 22, thereby blocking the pressure valve core 22 and affecting normal tea dispensing.

[0066] Specifically, the filter membrane 40 is made of non-woven fabric or filter paper, and can be fixed on the side of the internal boss 212 close to the lower chamber 214 by welding.

[0067] According to one embodiment of the present invention, Figure 1 and Figure 7 As shown, a sealing ring 50 is provided between the pressure valve core 22 and the brewing support 21. In this embodiment, the sealing ring 50 can be a convex ring integrally formed on the outer peripheral wall of the valve core body 221 of the pressure valve core 22, which saves the number of parts and can effectively seal the gap between the pressure valve core 22 and the brewing support 21 to prevent liquid leakage.

[0068] According to one embodiment of the present invention, the pressure valve core 22 and / or the constricted section 225 are made of an elastic plastic material. In this embodiment, the pressure valve core 22 is installed into the brewing support 21 through an interference fit, and the valve ball 222 is forcibly installed into the first cavity 223 of the valve core body 221 through elastic deformation of the valve core body 221. The use of an elastic plastic material for the pressure valve core 22 facilitates the above installation process.

[0069] In order to explain the brewing principle of the pressure brewing tea can of the present invention in more detail, the pressure brewing process of the tea can will be described in detail below.

[0070] First, place the tea can vertically into the brewing machine and close the brewing chamber. The machine's needle then pierces the water inlet puncture area 14 of the sealing film 60 at the top of the tea can. Simultaneously, the machine's tea outlet puncture blade simultaneously pierces the tea outlet puncture area 15 of the sealing film 60. At this point, both the water inlet and outlet of the tea can are punctured, allowing normal brewing and tea dispensing.

[0071] After entering the normal brewing state, when brewing the first cup of tea, the valve ball 222 is inside the first cavity 223 of the pressure valve core 22, and the valve ball 222 is in the trumpet-shaped through hole 2231 of the first cavity 223 due to its own gravity (such as Figure 8As shown in FIG2 , the water in the brewing chamber 12 gradually increases, and the water level outside the brewing bracket 21 is higher than the water level inside the brewing bracket 21, causing the water level inside the brewing bracket 21 to be pressurized and the valve ball 222 is lifted up to fit the bottom edge of the constricted section 225 of the valve core body 221 (as shown in FIG2 ). Figure 9 At this time, as the amount of water continues to accumulate, the water level in the brewing bracket 21 is affected by the water level pressure in the brewing chamber 12 and becomes larger and larger, and the pressure of the valve ball 222 on the bottom edge of the necking section 225 becomes larger and larger, until the valve ball 222 is forcibly squeezed into the second cavity 224 from the necking section 225 (as shown in FIG. Figure 10 At this point, the seal between the valve ball 222 and the valve core body 221 is broken, and the brewed tea flows from the first cavity 223 into the second cavity 224, while the valve ball 222 is lifted up by the tea that continues to flow into the second cavity 224. At this point, the narrow gap formed between the valve ball 222 and the sidewall of the second cavity 224 after it enters the second cavity 224 prevents the large outflow of tea. The inflow is large, while the outflow is small. This flow difference creates a certain brewing pressure within the tank body 10. At the same time, because the tea entering the second cavity 224 has to overcome the weight of the valve ball 222 to lift it away from the top edge of the constricted section 225 and flow out, the weight of the valve ball 222 hinders the outflow of tea, further creating a flow difference and thus further creating a certain brewing pressure within the tank body 10. The tea entering the second cavity 224 flows through the liquid outlet 24 of the pressure valve core 22 into the tea discharge hole 31 on the tea tray 30, and finally flows out of the tea discharge hole 31 through the tea discharge puncture area 15 and into the tea set. When the first brewing is completed and the water supply is stopped, the valve ball 222 falls back to the top edge of the constricted section 225.

[0072] During the second and subsequent brewing of tea, the valve ball 222's seal on the entire tea canister is broken. However, the narrow gap formed between the valve ball 222 and the sidewall of the second cavity 224 after it enters the second cavity 224 hinders the large outflow of tea. The large inflow and small outflow result in a flow difference, and the tea must overcome the weight of the valve ball 222 before it can flow out. These two factors cause a certain pressure to remain within the canister 10, thereby enabling multiple pressurized brewing of tea. The brewing pressure for the second and subsequent brewings is lower than that for the first brewing, which is consistent with the brewing principle of tea. During the first brewing, the tea leaves are not yet fully soaked, requiring greater pressure to quickly extract the active ingredients. During the second and subsequent brewings, the tea leaves are already soaked, and the active ingredients are more easily extracted, making it more suitable to use a lower pressure than the first brewing.

[0073] Furthermore, the tea canister of the present invention can adjust the brewing pressure by adjusting the diameter of the valve ball 222 or the hardness of the pressure valve core 22. The larger the diameter of the valve ball 222, the greater the resistance to breaking the seal through the tapered section 225, the greater the pressure that can accumulate within the tea canister, and the higher the brewing pressure. Similarly, the greater the hardness of the pressure valve core 22, the greater the pressure exerted by the valve ball 222 through the tapered section 225, and the correspondingly higher brewing pressure.

[0074] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic tea brewing can, characterized in that: include: The can body has a receiving cavity for holding tea leaves, and is provided with a water inlet puncture area and a tea outlet puncture area; The brewing structure is located in the accommodating chamber, and the brewing structure divides the accommodating chamber into a brewing chamber and a tea discharge chamber. The tea discharge chamber is located in the brewing structure, and the brewing structure includes a brewing support and a pressure valve core located in the tea discharge chamber. The brewing support has a plurality of tea filtering holes, and the brewing chamber is connected to the tea discharge chamber through the plurality of tea filtering holes. The water inlet puncture area is opposite to the brewing chamber, and the tea outlet puncture area is opposite to the tea discharge chamber. The tank body is a hollow structure with an opening at the top, a sealing film is provided at the top opening, and the water inlet puncture area and the tea outlet puncture area are both located on the sealing film; The brewing bracket divides the tea discharge chamber into an upper chamber and a lower chamber through an internal boss, and the plurality of tea filter holes are connected to the lower chamber. The pressure valve core is located in the upper chamber, and the internal boss has a tea inlet connecting the lower chamber and the upper chamber, and the tea inlet is connected to the liquid inlet of the pressure valve core; The brewing structure further includes a tea dispensing tray, which can be inserted into the brewing bracket and abut against the pressure valve core. The tea dispensing tray is provided with a tea discharge hole, which is connected to the liquid outlet of the pressure valve core. The tea dispensing tray is fixedly connected to the sealing film, and the sealing film forms the tea dispensing puncture zone in the inner circular area of ​​the tea dispensing tray, and the sealing film forms the water inlet puncture zone in the annular area between the tank body and the tea dispensing tray.

2. The automatic tea brewing can according to claim 1, characterized in that: When the water inlet puncture area is punctured, water can be injected into the brewing chamber through the water inlet puncture area; when the tea outlet puncture area is punctured, liquid in the tea discharge chamber can be discharged from the tank body through the tea outlet puncture area.

3. The automatic tea brewing can according to claim 1 or 2, characterized in that: The pressure valve core has a valve core body and a valve ball movably arranged in the valve core body, wherein the valve ball has a tea discharge state that moves from a first position in the valve core body to a second position in the valve core body under at least one level of brewing pressure.

4. The automatic tea brewing can according to claim 3, characterized in that: The valve core body has a first cavity and a second cavity that are connected to each other. The second cavity is connected to the multiple tea filtering holes through the first cavity. A necked section is formed at the connection between the first cavity and the second cavity. When the liquid inlet pressure in the tea discharge cavity is greater than or equal to the first-level brewing pressure, the valve ball is in the first position against the necked section, and can be in the second position of breaking through the necked section and entering the second cavity under the continuous action of the first-level brewing pressure.

5. The automatic tea brewing can according to claim 3, characterized in that: When the liquid inlet height in the brewing chamber is greater than the liquid inlet height in the tea discharge chamber, the valve ball is in a sealed state at the liquid inlet end of the valve core body.

6. The automatic tea brewing can according to claim 5, characterized in that: The valve core body has a first cavity and a second cavity that are connected to each other, and the second cavity is connected to the multiple tea filtering holes through the first cavity; the first cavity includes a trumpet-shaped through hole and a spherical through hole that are connected to each other, the trumpet-shaped through hole is connected to the multiple tea filtering holes and its inner diameter is smaller than the diameter of the valve ball, the spherical through hole is connected to the second cavity and its inner diameter is larger than the diameter of the valve ball, and when the valve ball is in the sealed state, the valve ball is sealed and abutted against the trumpet-shaped through hole.

7. The automatic tea brewing can according to claim 1, characterized in that: The total flow area of ​​the tea inlet is greater than the total flow area of ​​the tea discharge hole.

8. The automatic tea brewing can according to claim 1, characterized in that: A filter membrane is provided at the tea inlet, and the filter membrane is connected to the side surface of the internally arranged boss close to the lower chamber.

9. The automatic tea brewing can according to claim 1, characterized in that: The bottom end of the brewing support is provided with a base, and the base is connected to the bottom wall of the accommodating cavity of the tank body.

10. The automatic tea brewing can according to claim 1, characterized in that: A sealing ring is provided between the pressure valve core and the brewing support.

11. The automatic tea brewing can according to claim 4, characterized in that: The pressure valve core and / or the necking section are made of elastic plastic material.

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