Cold extraction instant tea preparation method based on ultrahigh pressure sterilization technology
By introducing pretreatment and segmented extraction technology in the preparation process of instant tea, combined with ultra-high pressure sterilization and concentration and drying, the problems of long processing time and poor flavor retention in the prior art are solved, and high-efficiency and low-energy consumption of high-quality instant tea preparation are achieved.
Patent Information
- Application Number
- CN202510258203.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-06-06
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing cold-brew instant tea preparation method based on ultra-high pressure sterilization technology has the problem of long processing time and inability to effectively retain the tea flavor, resulting in increased energy consumption and unable to meet market demand.
The pretreatment mechanism is used to cold-brush pretreat high-quality tea leaves, and the cold-brushing equipment is used to cold-brushing equipment. The fragrance, umami and mellow taste ingredients in the tea are extracted in segments, and then filled, sterilized and concentrated and dried to form high-quality instant tea powder.
Through segmented extraction and ultra-high pressure sterilization technology, the flavor and nutritional components of tea are effectively retained, energy consumption is reduced, product quality is improved, and the market demand for high-quality instant tea is met.
Smart Images
Figure CN120094242A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of instant tea preparation, and specifically is a method for preparing cold-extracted instant tea based on ultra-high pressure sterilization technology. Background Art
[0002] As the "king of beverages in the 21st century", tea not only has a unique flavor, but also has rich nutritional value and health benefits. In recent years, as people pay more attention to their own health and improve their living standards, high-quality and high-value-added products have increased day by day, and high-end beverages, fruit juices, biopharmaceuticals, etc. have gradually become the main body of people's daily consumption. Instant tea is a solid beverage tea that can be quickly dissolved in water. With finished tea, semi-finished tea, tea by-products or fresh leaves as raw materials, through extraction, filtration, concentration, drying and other processes, it is processed into a new type of granular, powdered or small-piece beverage that is easily soluble in water without tea residues. It has the advantages of being easy to carry and convenient to drink, and does not contain pesticide residues. It is divided into two categories: pure tea and seasoning blended tea. Common pure teas include instant black tea, instant green tea, instant Tieguanyin, instant oolong tea, instant jasmine tea, instant Pu'er tea, etc. Traditional instant tea production is a heat process, so the products produced have problems such as dark color, low aroma, and bitter taste. Its application is greatly limited and it is often only used to process ice tea beverages. High-quality instant tea can be obtained by using "cold" processing technology. For this purpose, exploration is conducted by using ice water circulation percolation extraction, ultra-high pressure sterilization, and freeze-drying. The entire process of instant tea production can be carried out at low temperature, so that high-quality instant tea can be obtained, thereby developing a series of high-end products with obvious commercial value.
[0003] The existing cold-brew instant tea preparation method based on ultra-high pressure sterilization technology has certain disadvantages when used. The existing cold-brew instant tea preparation method based on ultra-high pressure sterilization technology usually directly processes the selected tea leaves through cold-brew equipment and then processes the tea leaves through ultra-high pressure processing equipment for ultra-high pressure sterilization. However, the cold-brew equipment has the problems of long processing time and failure to retain the tea flavor well during use, which may easily lead to increased energy consumption during the use of the cold-brew equipment and fail to meet people's needs. Summary of the invention
[0004] The present invention aims to solve the technical problems existing in the prior art; to this end, the present invention proposes a method for preparing cold-brew instant tea based on ultra-high pressure sterilization technology.
[0005] A method for preparing cold-brew instant tea based on ultra-high pressure sterilization technology, the specific steps comprising the following:
[0006] Step A: Select high-quality tea leaves to remove dust and impurities;
[0007] Step B: using a pretreatment mechanism to pre-treat the high-quality tea leaves by cold extraction;
[0008] Step C: cold-extracting the high-quality tea leaves after cold-extraction pretreatment using cold-extraction equipment to obtain clarified cold-extracted tea liquid;
[0009] Step D: filling the cold brewed tea liquid into sterile bottles through a filling device and sealing the bottles;
[0010] Step E: The sterile bottles filled with cold-brewed tea are subjected to ultra-high pressure sterilization treatment using ultra-high pressure treatment equipment;
[0011] Step F: The ultra-high pressure sterilized cold-brewed tea liquid is concentrated and dried using a concentration and drying device to prepare cold-brewed instant tea powder.
[0012] As a further solution of the present invention: in the step B, the pretreatment mechanism includes a pretreatment box for soaking high-quality tea leaves, several groups of ultrasonic generators movably arranged on the pretreatment box and assisting in the extraction of high-quality tea leaves, a first collecting structure detachably installed inside the pretreatment box and filtering and collecting high-quality tea leaves, and several groups of stirring structures symmetrically arranged below the first collecting structure to accelerate the pretreatment of high-quality tea leaves; wherein, a first transfer structure for transferring the high-quality tea leaves in the first collecting structure to the cold extraction equipment is arranged on one side of the pretreatment box; a lifting assembly for controlling the ultrasonic generator to adjust the position is arranged on the pretreatment box; the first transfer structure includes a first transfer pipe and a first transfer pump detachably installed on the outer wall of the pretreatment box and connected to the first transfer pipe, the inner wall of the first transfer pipe is set as a smooth surface, and the first transfer pump is set as a diaphragm pump, both of which can reduce the damage to the high-quality tea leaves during the transportation process; the stirring structure includes a stirring motor detachably installed on the outer wall of the pretreatment box, a stirring roller rotatably installed inside the pretreatment box and detachably connected to the output shaft of the stirring motor, and several groups of stirring blades arranged in a circular array and in rows on the stirring roller.
[0013] As a further scheme of the present invention: in the step C, the cold extraction equipment includes a first extraction box for performing preliminary cold extraction treatment on high-quality tea leaves, a second extraction box for performing re-cold extraction treatment on the high-quality tea leaves subjected to the preliminary cold extraction, and a filtering box for filtering the cold-extracted tea liquid in the pretreatment box, the first extraction box and the second extraction box; the cold extraction equipment also includes a cold extraction mechanism respectively arranged on the first extraction box and the second extraction box, and a cooling component arranged on the outside of the first extraction box and the second extraction box and cooling the liquid inside the first extraction box and the second extraction box; wherein, the first extraction box and the second extraction box are both provided with a second transfer structure for transferring high-quality tea leaves, and the structure of the first transfer structure is the same as that of the second transfer structure; the high-quality tea leaves in the first extraction box are continuously soaked for 6-8 hours, the cold water temperature is set to 4-6°C, and the fragrance and umami components in the tea leaves are mainly extracted; the high-quality tea leaves in the second extraction box are soaked for 8-12 hours, the cold water temperature is set to 8-10°C, and the weight is point extraction of the mellow taste and other complex flavor substances of the tea leaves; the pretreatment box, the first extraction box and the second extraction box are all provided with a third transfer structure for transferring the cold-brewed tea liquid to the filter box; the interior of the filter box is provided with a plurality of first filter components for filtering the cold-brewed tea liquid; the interiors of the pretreatment box, the first extraction box and the second extraction box are all provided with temperature sensors; the first transfer structure and the second transfer structure are used in combination to transfer high-quality tea leaves; the third transfer structure includes a second transfer pump and a second transfer pipe connected to the second transfer pump, and the first transfer structure, the second transfer structure and the third transfer structure can cooperate to mix the cold-brewed tea liquid in the pretreatment box, the first extraction box and the second extraction box in sections, and can perform separate quality control and monitoring at each stage to ensure that the extract at each stage meets the expected standards, and can better retain and highlight the various flavor substances in the tea leaves, avoid the unstable factors that may be caused by one-time mixing, and improve the product quality of cold-brewed instant tea.
[0014] As a further solution of the present invention: the cold extraction mechanism includes cold extraction tubes respectively arranged on the outer walls of the first extraction box and the second extraction box, a circulation pump connected to the cold extraction tube and allowing the cold extraction tea liquid to flow, and a second filtering component detachably mounted on the circulation pump and connected to the cold extraction tube; the cold extraction mechanism also includes a second collecting structure which is detachably mounted inside the first extraction box and the second extraction box and has the same structure as the first collecting structure; the circulation pump and the cold extraction tube cooperate to enable the cold extraction tea liquid to fully and evenly contact the tea leaves during the entire extraction process; the first extraction box and the second extraction box both control the circulation mixing of the refrigerated extraction tea liquid through the circulation pump and the cold extraction tube, thereby improving the extraction uniformity, avoiding local over-extraction or insufficient extraction, and no stirring equipment is required for stirring and mixing, thereby avoiding damage to the tea leaves.
[0015] As a further solution of the present invention: the second filtering component includes two groups of liquid-conducting square tubes connecting the circulation pump with the cold-brew tube, two groups of first liquid-conducting tubes aligned up and down and installed on the outer wall of the liquid-conducting square tube, a second liquid-conducting tube detachably connected to one end of the first liquid-conducting tube and a filter tube member arranged between the two groups of second liquid-conducting tubes; the second filtering component also includes a valve structure arranged on the first liquid-conducting tube, a first gear detachably installed on the rotating shaft of the valve structure and a driving structure arranged between the two groups of first liquid-conducting tubes and detachably fixed to the liquid-conducting square tube; wherein a second gear respectively meshing with the two groups of first gears is installed on the output shaft of the driving structure; a reinforcing block is arranged between the two groups of the liquid-conducting square tubes, which can improve the stability of the connection between the two groups of liquid-conducting square tubes; the filter tube member can filter impurities in the cold-brewed tea liquid, and the driving structure, the first gear and the second gear can cooperate to control the opening and closing of the filter tube member, so that the filter tube member can be disassembled and cleaned without stopping the circulation pump, thereby improving the cold-brew processing effect of the cold-brew mechanism.
[0016] As a further solution of the present invention: the cooling assembly includes a cold water tank arranged outside the first extraction box and the second extraction box, a cooling device arranged on one side of the cold water tank, a first cooling pipe member arranged inside the first extraction box and the second extraction box and connected to the cooling device, and a second cooling pipe member arranged inside the cold water tank and connected to the cooling device; wherein, both sides of the cold water tank are provided with a cold water pump and a cold water pipe connecting the two groups of cold water pumps with the first extraction box and the second extraction box respectively; the rear side surfaces of the first extraction box and the second extraction box are provided with a plate heat exchanger connected to the first cooling pipe member and recovering the cold energy generated during the cooling process and using the recovered cold energy for cold water in the cold water tank; the water outlet end of the cooling device is provided with a cooling pump for circulating cooling water and a tee member arranged at the water outlet end of the cooling pump and connected to the two groups of first cooling pipe members respectively; one end of the first cooling pipe member is connected to one end of the second cooling pipe member; the cold water tank, the cooling device, the cold water pump, the cooling pump and the plate heat exchanger are used in combination to recover and utilize heat energy during the extraction process, reduce energy consumption, and improve energy utilization.
[0017] As a further solution of the present invention: the first collecting structure and the second collecting structure both include a collecting filter cover, a discharge seat detachably mounted on the lower end of the collecting filter cover, and a discharge assembly movably arranged on the inner side of the discharge seat; wherein, a plurality of filter holes are arranged on the collecting filter cover, and one end of the first transfer structure and the second transfer structure are respectively connected to the lower ends of the two groups of discharge seats; and a discharge trough connected to the lower end of the collecting filter cover is arranged in the discharge seat.
[0018] As a further solution of the present invention: the discharge assembly includes a rotating seat symmetrically installed on the inner wall of the discharge trough, a discharge plate rotatably arranged on the inner side of the rotating seat and a blocking bar detachably installed on the inner wall of the discharge trough and arranged above the rotating seat, the blocking bar can block the two groups of discharge plates from rotating upward so as to guide the tea leaves into the discharge trough; wherein, a rotating rod rotatably connected to the rotating seat is provided on one side of the discharge plate, and the other side of the discharge plate is a semicircular surface, and one end surface of the two groups of discharge plates are fitted together; the discharge plate is made of easy-to-float material; the two groups of the discharge plates cooperate to block the tea leaves inside the collection filter cover.
[0019] As a further solution of the present invention: the first filter assembly includes several groups of support seats that can be detachably installed in the filter box, filter seats that are obliquely symmetrically installed in the filter box and connected to the support seats, and filter membranes that can be detachably installed in the filter seat; the first filter assembly also includes limit strips that are symmetrically arranged on both sides of the outer surface of the filter seat and several groups of limit seats that are symmetrically installed on the inner wall of the filter box and plugged into the limit strips; wherein, one end of the filter seat extends out of the filter box; a fixed plate frame for fixing the filter membrane is detachably installed in the filter seat; both sides of the outer surface of the support seat are support members that are plugged and limited with the filter seat, and the filter membrane can remove tiny particles and impurities in the tea liquid, thereby improving the clarity of the tea liquid; the first filter assembly can disassemble and maintain the filter seat while performing filtering work, thereby improving the filtering effect of the first filter assembly.
[0020] As a further solution of the present invention: the lifting assembly includes a lifting hydraulic cylinder symmetrically arranged on both sides of the outer surface of the pretreatment box and controlling the lifting of the ultrasonic generator, a box cover detachably connected to the output shaft of the lifting hydraulic cylinder and sealing the pretreatment box, a mounting frame arranged inside the pretreatment box and mounting a plurality of groups of ultrasonic generators, and a telescopic rod detachably connecting the mounting frame to the box cover; wherein, the ultrasonic generator extends into the first collection structure through the lifting hydraulic cylinder and the telescopic rod.
[0021] As a further solution of the present invention: both step D and step E are provided with a conveyor belt device, and the conveyor belt device can transport the sterile bottles.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] (1) The present invention uses high-quality tea as raw material and prepares cold-brewed instant tea through cold-brewed pretreatment, cold-brewed segmented dynamic treatment, filling and ultra-high pressure treatment. The tea leaves are placed in a pretreatment mechanism for mixing and cold-brewed pretreatment to soften the tea leaves and promote the release of flavor substances. The fragrance and umami components in the tea leaves and the mellow taste and other complex flavor substances of the tea leaves are extracted through cold-brewed segmented dynamic treatment. The microorganisms in the tea liquid are effectively killed through ultra-high pressure treatment, while the color, flavor and nutritional components of the tea liquid are maintained. The concentrated tea liquid is converted into instant tea powder under low temperature conditions by using vacuum concentration technology combined with spray drying and freeze drying technology, thereby retaining the natural aroma and nutritional components of the tea leaves.
[0024] (2) The present invention performs cold extraction pretreatment on tea leaves by setting up a pretreatment mechanism, a pretreatment box and a first collecting structure. The stirring motor, stirring roller, stirring blades, lifting hydraulic cylinder, box cover, mounting frame, telescopic rod and ultrasonic generator are used in combination to improve the effect of cold extraction pretreatment of tea leaves.
[0025] (3) The present invention provides a cold extraction mechanism and a cooling component. The first transfer pump and the first transfer pipe transfer the tea leaves that have been pre-treated by cold extraction. The cooling pump, the first cooling pipe, the second cooling pipe, the plate heat exchanger, the cooling equipment, the cold water pump, the cold water pipe and the cold water tank can provide the first extraction box and the second extraction box with the cold water required for cold extraction. In addition, heat energy can be recovered and utilized during the extraction process, thereby reducing energy consumption and improving energy utilization. The circulation pump, the cold extraction pipe, the liquid guiding square pipe, the first liquid guiding pipe, the valve structure, the second liquid guiding pipe and the filter pipe cooperate to ensure that the cold-extracted tea liquid is cooled in the whole process. The tea leaves are fully and evenly contacted during the extraction process, the circulation and mixing of the cold-brewed tea liquid is controlled, and the extraction uniformity is improved. The driving structure, the second gear, the first gear and the valve structure cooperate to disassemble and clean the filter pipe fittings without stopping the cold-brew mechanism, thereby improving the cold-brew processing effect of the cold-brew mechanism. The filter box, the filter seat and the filter membrane cooperate to filter the cold-brewed tea liquid. The filter seat, the support, the limit strip and the limit seat cooperate to remove the filter seat from the filter box and disassemble and replace the filter membrane while performing the filtering work, thereby improving the filtering effect of the first filter component.
[0026] (4) The present invention filters and collects tea leaves through the set discharge assembly, the first collecting structure and the second collecting structure. The first transfer pump, the first transfer pipe, the discharge plate, the rotating rod and the rotating seat cooperate to discharge the tea leaves. The blocking bar can block and limit the discharge plate, thereby improving the reliability of the discharge assembly and avoiding blockage, thereby reducing the number of times the discharge assembly is maintained. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0028] Figure 2 It is a partial structural diagram of the heat treatment box and the conveying assembly in the present invention.
[0029] Figure 3 It is a partial structural diagram of the solution heat treatment in the present invention.
[0030] Figure 4 It is a partial structural diagram of the sealing plate and the electric telescopic rod in the present invention.
[0031] Figure 5 It is a partial structural diagram of the clamping mechanism in the present invention.
[0032] Figure 6 It is a partial structural diagram of the clamping base and the guide slide in the present invention.
[0033] Figure 7 It is a partial structural diagram of the clamping structure and the first adjustment structure in the present invention.
[0034] Figure 8 It is a partial structural diagram of the second regulating structure in the present invention.
[0035] Fig. 9 It is a partial structural diagram of the second clamping member and the first lifting structure in the present invention.
[0036] Fig.10 It is a partial structural diagram of the transmission component in the present invention.
[0037] Fig.11 It is a partial structural diagram of the transfer mechanism in the present invention.
[0038] Fig.12 It is a partial structural diagram of the limiting component in the present invention.
[0039] Fig.13 It is a partial structural diagram of the filter box and the connecting piece in the present invention.
[0040] In the figure: 1. cold extraction equipment; 2. filling equipment; 3. ultra-high pressure treatment equipment; 4. pretreatment box; 5. ultrasonic generator; 6. first collection structure; 7. stirring structure; 8. first transfer structure; 9. first extraction box; 10. second extraction box; 11. filter box; 12. second transfer structure; 13. third transfer structure; 14. cold extraction tube; 15. circulation pump; 16. second collection structure; 17. liquid guide square tube; 18. first liquid guide tube; 19. second liquid guide tube; 20. filter pipe; 21. valve structure; 22. first gear; 23. drive structure; 24. second gear; 25. reinforcement block; 26. cold water tank; 27. cooling equipment; 28. first cooling pipe; 29. second cooling pipe; 30 , cold water pump; 31. cold water pipe; 32. plate heat exchanger; 33. cooling pump; 34. tee; 35. collecting filter cover; 36. discharge seat; 37. rotating seat; 38. discharge plate; 39. blocking bar; 40. supporting seat; 41. filter seat; 42. filter membrane; 43. limiting bar; 44. limiting seat; 45. fixed plate frame; 46. supporting member; 47. lifting hydraulic cylinder; 48. box cover; 49. mounting frame; 50. telescopic rod; 51. first transfer pipe; 52. first transfer pump; 53. stirring motor; 54. stirring roller; 55. stirring blade; 56. temperature sensor; 57. second transfer pump; 58. second transfer pipe; 59. conveyor belt device; 60. discharge pump; 61. concentration and drying equipment. DETAILED DESCRIPTION
[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. 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 creative work are within the scope of protection of the present invention.
[0042] Embodiment 1
[0043] See also Figure 1 - Figure 4 The present application provides a method for preparing cold-brew instant tea based on ultra-high pressure sterilization technology, and the specific steps include the following:
[0044] Step A: Select high-quality tea leaves to remove dust and impurities;
[0045] Step B: using a pretreatment mechanism to pre-treat the high-quality tea leaves by cold extraction;
[0046] Step C: cold-extracting the high-quality tea leaves after cold-extraction pretreatment using the cold-extraction device 1 to obtain a clear cold-extracted tea liquid;
[0047] Step D: filling the cold-brewed tea liquid into a sterile bottle through the filling device 2 and sealing the bottle;
[0048] Step E: The sterile bottles filled with cold-brewed tea are subjected to ultra-high pressure sterilization treatment using ultra-high pressure treatment equipment 3;
[0049] Step F: The ultra-high pressure sterilized cold-brewed tea liquid is concentrated and dried by a concentration and drying device 61 to prepare cold-brewed instant tea powder.
[0050] In the present invention, both step D and step E are provided with a conveyor belt device 59, and the conveyor belt device 59 can transport the sterile bottles.
[0051] Step F uses vacuum concentration technology combined with spray drying and freeze drying technology to convert concentrated tea liquid into instant tea powder under low temperature conditions, retaining the natural aroma and nutrients of the tea.
[0052] In summary, high-quality tea leaves are selected to ensure that the tea leaves are fresh, the tea leaves are screened and cleaned to remove dust and impurities, the tea leaves are placed in a pretreatment mechanism for mixing and cold extraction pretreatment to soften the tea leaves and promote the release of flavor substances, and after soaking for 1-2 hours, the high-quality tea leaves after cold extraction pretreatment are transferred to the cold extraction equipment 1 to obtain clarified cold-extracted tea liquid, and the clarified cold-extracted tea liquid is introduced into the filling equipment 2, filled into sterile bottles by the filling equipment 2 and sealed, and the conveyor belt device 59 transports the sealed sterile bottles to the ultra-high pressure treatment equipment 3 for treatment for 1-5 minutes. The ultra-high pressure treatment equipment 3 can effectively kill the microorganisms in the tea liquid while maintaining the color, flavor and nutritional components of the tea liquid, affix product labels to the bodies of the sterile bottles, and perform outer packaging to ensure that the product information is complete.
[0053] Embodiment 2
[0054] Reference Figure 2 - Figure 4 and Fig.12 - Fig.13, which is the second embodiment of the present invention, wherein in step B of the present invention, the pretreatment mechanism includes a pretreatment box 4 for soaking high-quality tea leaves, a plurality of groups of ultrasonic generators 5 movably arranged on the pretreatment box 4 and assisting in the extraction of the high-quality tea leaves, a first collecting structure 6 detachably installed inside the pretreatment box 4 and filtering and collecting the high-quality tea leaves, and a plurality of groups of stirring structures 7 symmetrically arranged below the first collecting structure 6 to accelerate the pretreatment of the high-quality tea leaves; wherein a first transfer structure 8 for transferring the high-quality tea leaves in the first collecting structure 6 to the cold extraction device 1 is arranged on one side of the pretreatment box 4; a control mechanism for controlling the ultrasonic generator 5 is arranged on the pretreatment box 4. The sound wave generator 5 is used to adjust the position of the lifting component; the first transfer structure 8 includes a first transfer pipe 51 and a first transfer pump 52 which is detachably mounted on the outer wall of the pretreatment box 4 and connected to the first transfer pipe 51. The inner wall of the first transfer pipe 51 is set as a smooth surface, and the first transfer pump 52 is set as a diaphragm pump, both of which can reduce the damage to high-quality tea during the transportation process; the stirring structure 7 includes a stirring motor 53 which is detachably mounted on the outer wall of the pretreatment box 4, a stirring roller 54 which is rotatably mounted inside the pretreatment box 4 and detachably connected to the output shaft of the stirring motor 53, and a plurality of groups of stirring blades 55 which are arranged in a circular array and in rows on the stirring roller 54.
[0055] The lifting assembly in the present invention includes a lifting hydraulic cylinder 47 symmetrically arranged on both sides of the outer surface of the pretreatment box 4 and controlling the lifting of the ultrasonic generator 5, a box cover 48 detachably connected to the output shaft of the lifting hydraulic cylinder 47 and sealing the pretreatment box 4, a mounting frame 49 arranged inside the pretreatment box 4 and mounting a plurality of groups of ultrasonic generators 5, and a telescopic rod 50 detachably connecting the mounting frame 49 to the box cover 48; wherein the ultrasonic generator 5 is extended into the first collecting structure 6 through the lifting hydraulic cylinder 47 and the telescopic rod 50, and the output shaft of the lifting hydraulic cylinder 47 is provided with a reinforcement connected to the box cover 48.
[0056] In summary, the tea leaves are placed in the pretreatment box 4 and soaked for 1-2 hours, the lifting hydraulic cylinder 47 is started to drive the box cover 48 to move downward, and the box cover 48 controls the mounting frame 49 and the ultrasonic generator 5 to move downward through the telescopic rod 50, and the ultrasonic generator 5 is started to use the cavitation effect of ultrasound to accelerate the rupture of the tea cell wall and improve the extraction efficiency, and the stirring motor 53 is started to drive the stirring blade 55 to rotate through the stirring roller 54, and the stirring blade 55 drives the cold water to flow, so that the cold water passes through the first collecting structure 6 to accelerate the contact and mixing of the cold water and the tea leaves, thereby improving the effect of the cold extraction pretreatment, and the first transfer pump 52 is started, and the tea leaves pretreated with cold extraction are transferred to the cold extraction equipment 1 through the first transfer pipe 51.
[0057] Embodiment 3
[0058] Reference Figure 2 - Fig. 9, which is the third embodiment of the present invention, wherein in step C of the present invention, the cold extraction equipment 1 includes a first extraction box 9 for preliminary cold extraction of high-quality tea leaves, a second extraction box 10 for re-cold extraction of the high-quality tea leaves subjected to the preliminary cold extraction, and a filtering box 11 for filtering the cold-extracted tea liquid in the pretreatment box 4, the first extraction box 9 and the second extraction box 10; the cold extraction equipment 1 also includes a cold extraction mechanism respectively arranged on the first extraction box 9 and the second extraction box 10, and a cooling component arranged on the outside of the first extraction box 9 and the second extraction box 10 and cooling the liquid inside the first extraction box 9 and the second extraction box 10; wherein the first extraction box 9 and the second extraction box 10 are both provided with a second transfer structure 12 for transferring high-quality tea leaves, and the structure of the first transfer structure 8 is the same as that of the second transfer structure 12; the high-quality tea leaves in the first extraction box 9 are continuously soaked for 6-8 hours, the cold water temperature is set to 4-6°C, and the fragrance and umami components in the tea leaves are mainly extracted; the high-quality tea leaves in the second extraction box 10 are soaked for 8-12 hours, the cold water temperature is set to 8-10°C, and the weight The mellow taste and other complex flavor substances of the tea leaves can be extracted; the pretreatment box 4, the first extraction box 9 and the second extraction box 10 are all provided with a third transfer structure 13 for transferring the cold-brewed tea liquid to the filter box 11; the filter box 11 is provided with a plurality of first filter components for filtering the cold-brewed tea liquid; the pretreatment box 4, the first extraction box 9 and the second extraction box 10 are all provided with a temperature sensor 56; the first transfer structure 8 and the second transfer structure 12 are used in combination to transfer high-quality tea leaves; the third transfer structure 13 includes a second transfer pump 57 and a second transfer pipe 58 connected to the second transfer pump 57, and the first transfer structure 8, the second transfer structure 12 and the third transfer structure 13 can cooperate to mix the cold-brewed tea liquid in the pretreatment box 4, the first extraction box 9 and the second extraction box 10 in sections, and can perform separate quality control and monitoring at each stage to ensure that the extract at each stage meets the expected standards, and can better retain and highlight the various flavor substances in the tea leaves, avoid the unstable factors that may be caused by one-time mixing, and improve the product quality of cold-brewed instant tea.
[0059] The cold-brewing mechanism in the present invention comprises a cold-brewing tube 14 respectively arranged on the outer wall of the first extraction box 9 and the second extraction box 10, a circulating pump 15 connected to the cold-brewing tube 14 and causing the cold-brewing tea liquid to flow, and a second filtering component detachably mounted on the circulating pump 15 and connected to the cold-brewing tube 14; the cold-brewing mechanism also comprises a second collecting structure 16 detachably mounted inside the first extraction box 9 and the second extraction box 10 and having the same structure as the first collecting structure 6; the circulating pump 15 cooperates with the cold-brewing tube 14 to enable the cold-brewing tea liquid to fully and evenly contact the tea leaves during the entire extraction process; the first extraction box 9 and the second extraction box 10 both control the circulation and mixing of the cold-brewing tea liquid through the circulating pump 15 and the cold-brewing tube 14, thereby improving the uniformity of extraction, avoiding local over-extraction or insufficient extraction, and not requiring the use of a stirring device for stirring and mixing, thereby avoiding damage to the tea leaves. The circulating pump 15 cooperates with the cold-brewing tube 14 to prevent the tea leaves from adhering to the first collecting structure 6 and the second collecting structure 16 during transportation.
[0060] The second filter assembly in the present invention includes two groups of liquid guiding square tubes 17 connecting the circulation pump 15 with the cold extraction tube 14, two groups of first liquid guiding tubes 18 aligned up and down and installed on the outer wall of the liquid guiding square tube 17, a second liquid guiding tube 19 detachably connected to one end of the first liquid guiding tube 18, and a filter pipe 20 arranged between the two groups of second liquid guiding tubes 19, and one end of the second liquid guiding tube 19 is provided with a connector detachably fixed to the first liquid guiding tube 18; the second filter assembly also includes a valve structure 21 arranged on the first liquid guiding tube 18, a first gear 22 detachably installed on the rotating shaft of the valve structure 21, and a driving structure 23 arranged between the two groups of first liquid guiding tubes 18 and detachably fixed to the liquid guiding square tube 17. In the initial state, one of the two groups of valve structures 21 has a valve structure 21 The first gear 22 and the second gear 24 are controlled by the driving structure 23 to open and close the valve structure 21; wherein, the output shaft of the driving structure 23 is provided with a second gear 24 which is respectively meshed with the two groups of first gears 22; a reinforcing block 25 is provided between the two groups of liquid-conducting square tubes 17, which can improve the stability of the connection between the two groups of liquid-conducting square tubes 17; the filter tube 20 can filter impurities in the cold-brewed tea liquid, and the driving structure 23, the first gear 22 and the second gear 24 can cooperate to control the opening and closing of the filter tube 20, so that the filter tube 20 can be disassembled and cleaned without stopping the circulating pump 15, thereby improving the cold brewing treatment effect of the cold brewing mechanism.
[0061] The cooling assembly of the present invention comprises a cold water tank 26 arranged outside the first extraction box 9 and the second extraction box 10, a cooling device 27 arranged on one side of the cold water tank 26, a first cooling pipe 28 respectively arranged inside the first extraction box 9 and the second extraction box 10 and connected to the cooling device 27, and a second cooling pipe 29 arranged inside the cold water tank 26 and connected to the cooling device 27; wherein, both sides of the cold water tank 26 are provided with cold water pumps 30 and cold water pipes 31 connecting the two groups of cold water pumps 30 to the first extraction box 9 and the second extraction box 10 respectively; the rear sides of the first extraction box 9 and the second extraction box 10 are provided with a first cooling pipe 28 and connected to the first extraction box 9 and the second extraction box 10. A plate heat exchanger 32 is provided for recovering the cold energy generated during the cooling process and using the recovered cold energy for the cold water in the cold water tank 26; a cooling pump 33 for circulating the cooling water is provided at the water outlet of the cooling device 27, and a three-way piece 34 is provided at the water outlet of the cooling pump 33 and is respectively connected to the two groups of first cooling pipes 28, and a control valve is provided on the first cooling pipe 28; one end of the first cooling pipe 28 is connected to one end of the second cooling pipe 29; the cold water tank 26, the cooling device 27, the cold water pump 30, the cooling pump 33 and the plate heat exchanger 32 are used in combination to recover and utilize heat energy during the extraction process, reduce energy consumption and improve energy utilization.
[0062] The first filter assembly in the present invention includes several groups of support seats 40 detachably mounted in the filter box 11, filter seats 41 obliquely and symmetrically mounted in the filter box 11 and connected to the support seats 40, and filter membranes 42 detachably mounted in the filter seat 41; a discharge pump 60 and a discharge pipe for introducing tea liquid into the filling device 2 are arranged on the filter box 11, and the first filter assembly also includes limit bars 43 symmetrically arranged on both sides of the outer surface of the filter seat 41 and several groups of limit seats 44 symmetrically mounted on the inner wall of the filter box 11 and plugged into the limit bars 43; wherein, one end of the filter seat 41 extends out of the filter box 11; a fixed plate frame 45 for fixing the filter membrane 42 is detachably mounted in the filter seat 41; support members 46 are plugged and limited with the filter seat 41 on both sides of the outer surface of the support seat 40, and the filter membrane 42 can remove tiny particles and impurities in the tea liquid and improve the clarity of the tea liquid; the first filter assembly can disassemble and maintain the filter seat 41 while performing filtering work, thereby improving the filtering effect of the first filter assembly.
[0063] In summary, when the first extraction box 9 and the second extraction box 10 respectively perform cold extraction on the high-quality tea leaves, the circulation pump 15 is started, and the cold-extracted tea liquid below the second collecting structure 16 in the first extraction box 9 and the second extraction box 10 is extracted through the cold extraction pipe 14, and the liquid square pipe 17, the first liquid guide pipe 18, the valve structure 21, the second liquid guide pipe 19 and the filter pipe 20 are sequentially introduced into the circulation pump 15, and the circulation pump 15 guides the cold-extracted tea liquid to the top of the second collecting structure 16 through the cold extraction pipe 14, so that the cold-extracted tea liquid fully and evenly contacts the tea leaves during the entire extraction process, controls the circulation and mixing of the cold-extracted tea liquid, and improves the extraction uniformity;
[0064] When the filter tube 20 needs to be disassembled for maintenance, the driving structure 23 is started to drive the second gear 24 to rotate, and the second gear 24 drives the two sets of first gears 22 to rotate, thereby controlling the two sets of valve structures 21 to open and close, and the second liquid guide tube 19 is removed from the first liquid guide tube 18, so that the filter tube 20 is disassembled and cleaned;
[0065] The cooling pump 33 is started, and the cooling water is circulated in the plate heat exchanger 32, the first extraction box 9, the second extraction box 10, the cold water tank 26 and the cooling device 27 through the tee 34, the first cooling pipe 28 and the second cooling pipe 29, and the cold energy generated in the cooling process is recovered and used for the cold water in the cold water tank 26 to cool the cold water, and the cold water pump 30 is started, and the cold water in the cold water tank 26 is added to the first extraction box 9 and the second extraction box 10 through the cold water pipe 31, thereby improving the energy utilization rate;
[0066] When the first transfer structure 8, the second transfer structure 12 and the third transfer structure 13 are started, the cold-brewed tea liquid in the pretreatment box 4, the first extraction box 9 and the second extraction box 10 is mixed in sections and introduced into the filter box 11, so that the filter seat 41 and the filter membrane 42 cooperate to filter the cold-brewed tea liquid, and the filtered tea liquid is introduced into the filling equipment 2 through the discharge pump 60 and the discharge pipe. When it is necessary to disassemble and maintain a certain filter seat 41, the filter seat 41 is moved upward to drive the limit bar 43 to move in the limit seat 44, and the filter seat 41 is moved out of the support 46, and the filter seat 41 is moved out of the filter box 11, and the fixed plate frame 45 is removed from the filter seat 41, and the filter membrane 42 is disassembled and replaced.
[0067] Embodiment 4
[0068] Reference Figure 2 and Fig.10 - Fig.11, which is the fourth embodiment of the present invention, wherein the first collecting structure 6 and the second collecting structure 16 in the present invention both include a collecting filter cover 35, a discharge seat 36 detachably mounted on the lower end of the collecting filter cover 35, and a discharge assembly movably arranged on the inner side of the discharge seat 36; wherein a plurality of groups of filter holes are arranged on the collecting filter cover 35, one end of the first transfer structure 8 and the second transfer structure 12 are respectively connected to the lower ends of the two groups of discharge seats 36; and a discharge trough connected to the lower end of the collecting filter cover 35 is arranged in the discharge seat 36.
[0069] The discharge assembly in the present invention includes a rotating seat 37 symmetrically installed on the inner wall of the discharge trough, a discharge plate 38 rotatably arranged on the inner side of the rotating seat 37, and a blocking bar 39 detachably installed on the inner wall of the discharge trough and arranged above the rotating seat 37. The blocking bar 39 can block the two groups of discharge plates 38 from rotating upward so as to guide the tea leaves into the discharge trough; wherein, a rotating rod rotatably connected to the rotating seat 37 is provided on one side of the discharge plate 38, and the other side of the discharge plate 38 is a semicircular surface, and one end surface of the two groups of discharge plates 38 are fitted together; the discharge plate 38 is made of easy-to-float material; the two groups of discharge plates 38 cooperate to block the tea leaves inside the collection filter cover 35.
[0070] In summary, during the cold extraction process, the first collecting structure 6 and the second collecting structure 16 filter and collect the tea leaves. When the first transfer structure 8 and the second transfer structure 12 are started, the first transfer pump 52 works to draw water downward. Under the action of the water flow, the discharge plate 38 is rotated downward through the rotating rod, so that the collection filter cover 35 is connected with the discharge groove on the discharge seat 36, thereby introducing the tea leaves in the first collecting structure 6 and the second collecting structure 16 into the first transfer pipe 51 through the discharge groove. After the first transfer pump 52 is turned off, the discharge plate 38 is rotated upward under the action of the buoyancy of the water and the discharge groove is blocked. When the lower end of the blocking bar 39 is in contact with the upper end surface of the discharge plate 38, the discharge plate 38 is blocked and limited.
[0071] Embodiment 5
[0072] Reference Figure 1 - Fig.13 , this embodiment is obtained by combining embodiment 1, embodiment 2, embodiment 3 and embodiment 4.
[0073] The pretreatment box 4 and the first collecting structure 6 perform cold extraction pretreatment on the tea leaves. The stirring motor 53, stirring roller 54, stirring blade 55, lifting hydraulic cylinder 47, box cover 48, mounting frame 49, telescopic rod 50 and ultrasonic generator 5 are used together to improve the effect of cold extraction pretreatment of the tea leaves.
[0074] The first transfer pump 52 and the first transfer pipe 51 transfer the tea leaves pre-treated by cold extraction. The cooling pump 33, the first cooling pipe 28, the second cooling pipe 29, the plate heat exchanger 32, the cooling device 27, the cold water pump 30, the cold water pipe 31 and the cold water tank 26 can provide the cold water required for cold extraction to the first extraction box 9 and the second extraction box 10, and recover and utilize heat energy during the extraction process, reduce energy consumption, and improve energy utilization. The circulation pump 15, the cold extraction pipe 14, the liquid guiding square pipe 17, the first liquid guiding pipe 18, the valve structure 21, the second liquid guiding pipe 19 and the filter pipe 20 cooperate to make the cold extraction tea liquid fully cooled during the entire extraction process. The driving structure 23, the second gear 24, the first gear 22 and the valve structure 21 cooperate to disassemble and clean the filter tube 20 without stopping the cold extraction mechanism, thereby improving the cold extraction treatment effect of the cold extraction mechanism. The filter box 11, the filter seat 41 and the filter membrane 42 cooperate to filter the cold extraction tea liquid. The filter seat 41, the support member 46, the limit bar 43 and the limit seat 44 cooperate to remove the filter seat 41 from the filter box 11 and disassemble and replace the filter membrane 42 while performing the filtering work, thereby improving the filtering effect of the first filter component.
[0075] The first collecting structure 6 and the second collecting structure 16 filter and collect the tea leaves. The first transfer pump 52, the first transfer pipe 51, the discharge plate 38, the rotating rod and the rotating seat 37 cooperate to discharge the tea leaves. The blocking bar 39 can block and limit the discharge plate 38, thereby improving the reliability of the discharge component and avoiding blockage, and reducing the number of times the discharge component is maintained.
[0076] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.
Claims
1. A method for preparing cold-brew instant tea based on ultra-high pressure sterilization technology, characterized in that: The specific steps include the following: Step A: Select high-quality tea leaves to remove dust and impurities; Step B: using a pretreatment mechanism to pre-treat the high-quality tea leaves by cold extraction; Step C: cold-extracting the high-quality tea leaves after the cold-extraction pretreatment using the cold-extraction equipment (1) to obtain a clear cold-extracted tea liquid; Step D: filling the cold-brewed tea liquid into sterile bottles through the filling equipment (2) and sealing the bottles; Step E: The sterile bottles filled with cold-brewed tea are subjected to ultra-high pressure sterilization treatment using ultra-high pressure treatment equipment (3); Step F: The ultra-high pressure sterilized cold-brewed tea liquid is concentrated and dried using a concentration and drying device (61) to prepare cold-brewed instant tea powder.
2. The method for preparing cold-brew instant tea based on ultra-high pressure sterilization technology according to claim 1, characterized in that: In the step B, the pretreatment mechanism comprises a pretreatment box (4) for soaking high-quality tea leaves, a plurality of groups of ultrasonic generators (5) movably arranged on the pretreatment box (4) and assisting in extracting the high-quality tea leaves, a first collecting structure (6) detachably installed inside the pretreatment box (4) and filtering and collecting the high-quality tea leaves, and a plurality of groups of stirring structures (7) symmetrically arranged below the first collecting structure (6) and accelerating the pretreatment of the high-quality tea leaves; Wherein, a first transfer structure (8) for transferring the high-quality tea leaves in the first collection structure (6) to the cold extraction device (1) is provided on one side of the pretreatment box (4); The pretreatment box (4) is provided with a lifting component for controlling the ultrasonic generator (5) to adjust the position.
3. The method for preparing cold-brew instant tea based on ultra-high pressure sterilization technology according to claim 2, characterized in that: In the step C, the cold extraction equipment (1) comprises a first extraction box (9) for performing preliminary cold extraction treatment on the high-quality tea leaves, a second extraction box (10) for performing secondary cold extraction treatment on the high-quality tea leaves subjected to the preliminary cold extraction treatment, and a filtering box (11) for filtering the cold-extracted tea liquid in the pretreatment box (4), the first extraction box (9) and the second extraction box (10); The cold extraction device (1) further comprises a cold extraction mechanism respectively arranged on the first extraction box (9) and the second extraction box (10), and a cooling component arranged outside the first extraction box (9) and the second extraction box (10) and cooling the liquid inside the first extraction box (9) and the second extraction box (10); Wherein, the first extraction box (9) and the second extraction box (10) are both provided with a second transfer structure (12) for transferring high-quality tea leaves, and the structure of the first transfer structure (8) is the same as that of the second transfer structure (12); The pretreatment box (4), the first extraction box (9) and the second extraction box (10) are all provided with a third transfer structure (13) for transferring the cold-extracted tea liquid to the filtering box (11); A plurality of first filter components for filtering the cold-brewed tea liquid are arranged inside the filter box (11).
4. The method for preparing cold-brewed instant tea based on ultra-high pressure sterilization technology according to claim 3, characterized in that: The cold extraction mechanism comprises cold extraction tubes (14) respectively arranged on the outer walls of the first extraction box (9) and the second extraction box (10), a circulation pump (15) connected to the cold extraction tubes (14) and configured to flow the cold extraction tea liquid, and a second filtering component detachably mounted on the circulation pump (15) and connected to the cold extraction tubes (14); The cold extraction mechanism further comprises a second collection structure (16) which is detachably mounted inside the first extraction box (9) and the second extraction box (10) and has the same structure as the first collection structure (6); The circulation pump (15) cooperates with the cold extraction tube (14) to allow the cold extraction tea liquid to fully and evenly contact the tea leaves during the entire extraction process.
5. The method for preparing cold-brewed instant tea based on ultra-high pressure sterilization technology according to claim 4, characterized in that: The second filtering assembly comprises two groups of liquid guiding square tubes (17) connecting the circulation pump (15) and the cold extraction tube (14), two groups of first liquid guiding tubes (18) installed on the outer wall of the liquid guiding square tubes (17) in an aligned manner up and down, a second liquid guiding tube (19) detachably connected to one end of the first liquid guiding tube (18), and a filtering tube member (20) arranged between the two groups of second liquid guiding tubes (19); The second filter assembly further comprises a valve structure (21) arranged on the first liquid guiding tube (18), a first gear (22) detachably mounted on the rotating shaft of the valve structure (21), and a driving structure (23) arranged between the two groups of first liquid guiding tubes (18) and detachably fixed to the liquid guiding square tube (17); Wherein, a second gear (24) is mounted on the output shaft of the driving structure (23) and is respectively meshed with the two sets of first gears (22); A reinforcing block (25) is provided between the two groups of liquid-conducting square tubes (17).
6. The method for preparing cold-brewed instant tea based on ultra-high pressure sterilization technology according to claim 4, characterized in that: The cooling assembly comprises a cold water tank (26) arranged outside the first extraction box (9) and the second extraction box (10), a cooling device (27) arranged on one side of the cold water tank (26), a first cooling pipe (28) arranged inside the first extraction box (9) and the second extraction box (10) and connected to the cooling device (27), and a second cooling pipe (29) arranged inside the cold water tank (26) and connected to the cooling device (27); Wherein, both sides of the cold water tank (26) are provided with cold water pumps (30) and cold water pipes (31) connecting the two groups of cold water pumps (30) with the first extraction tank (9) and the second extraction tank (10) respectively; The rear sides of the first extraction box (9) and the second extraction box (10) are both provided with a plate heat exchanger (32) which is connected to the first cooling pipe (28) and recovers the cold energy generated during the cooling process and uses the recovered cold energy for cold water in the cold water tank (26); The water outlet of the cooling device (27) is provided with a cooling pump (33) for circulating cooling water, and a tee (34) provided at the water outlet of the cooling pump (33) and connected to the two groups of first cooling pipes (28) respectively; One end of the first cooling pipe (28) is connected to one end of the second cooling pipe (29).
7. The method for preparing cold-brewed instant tea based on ultra-high pressure sterilization technology according to claim 4, characterized in that: The first collecting structure (6) and the second collecting structure (16) both comprise a collecting filter cover (35), a discharge seat (36) detachably mounted at the lower end of the collecting filter cover (35), and a discharge assembly movably arranged inside the discharge seat (36); Wherein, one end of the first transfer structure (8) and the second transfer structure (12) are respectively connected to the lower ends of the two groups of discharge seats (36); The discharge seat (36) is provided with a discharge groove which is in communication with the lower end of the collecting filter cover (35).
8. The method for preparing cold-brewed instant tea based on ultra-high pressure sterilization technology according to claim 7, characterized in that: The discharge assembly comprises a rotating seat (37) symmetrically mounted on the inner wall of the discharge trough, a discharge plate (38) rotatably mounted on the inner side of the rotating seat (37), and a blocking bar (39) detachably mounted on the inner wall of the discharge trough and disposed above the rotating seat (37); Wherein, a rotating rod rotatably connected to the rotating seat (37) is disposed on one side of the discharge plate (38), and the other side of the discharge plate (38) is a semicircular surface; The discharge plate (38) is made of a buoyant material; The two groups of discharge plates (38) cooperate to block the tea leaves inside the collection filter cover (35).
9. The method for preparing cold-brewed instant tea based on ultra-high pressure sterilization technology according to claim 3, characterized in that: The first filter assembly comprises a plurality of groups of support seats (40) detachably mounted in the filter box (11), a filter seat (41) obliquely symmetrically mounted in the filter box (11) and connected to the support seats (40), and a filter membrane (42) detachably mounted in the filter seat (41); The first filter assembly further comprises limit strips (43) symmetrically arranged on both sides of the outer surface of the filter seat (41) and a plurality of limit seats (44) symmetrically installed on the inner wall of the filter box (11) and plugged into the limit strips (43); Wherein, one end of the filter seat (41) extends out of the filter box (11); A fixing plate frame (45) for fixing the filter membrane (42) is detachably installed in the filter seat (41); Both sides of the outer surface of the support seat (40) are provided with support members (46) that are inserted and limited in position with the filter seat (41).
10. The method for preparing cold-brewed instant tea based on ultra-high pressure sterilization technology according to claim 2, characterized in that: The lifting assembly comprises a lifting hydraulic cylinder (47) symmetrically arranged on both sides of the outer surface of the pretreatment box (4) and controlling the ultrasonic generator (5) to be lifted and lowered, a box cover (48) detachably connected to the output shaft of the lifting hydraulic cylinder (47) and sealing the pretreatment box (4), a mounting frame (49) arranged inside the pretreatment box (4) and mounting a plurality of groups of ultrasonic generators (5), and a telescopic rod (50) detachably connecting the mounting frame (49) and the box cover (48); The ultrasonic generator (5) extends into the first collecting structure (6) through a lifting hydraulic cylinder (47) and a telescopic rod (50).