Throat-clearing tea and preparation method thereof

Abstract

The invention is suitable for the technical field of tea drinks, and provides throat-clearing tea and a preparation method thereof.The throat-clearing tea is prepared from, by weight, 3 parts of bamboo leaves, 5 parts of rhizoma belamcandae, 20 parts of krill and 7 parts of hypericum ascyron. Wherein the bamboo leaves are dry leaves of phyllostachys henon, the picking time is May to June every year, and after picking, the bamboo leaves are cleaned and aired until the water content is 8-12%; the belamcanda chinensis is dry rhizomes of tectoriaceae belamcanda plant belamcanda chinensis, the harvesting time is autumn, fibrous roots and impurities are removed after harvesting, and the belamcanda chinensis is washed clean, sliced and aired until the water content is 6-10%; the Kriage is dry tender leaves of ilex kudingcha which is an ilex plant, the picking time is March to April in spring, and after picking, the Kriage is subjected to fixation, rolling and drying until the water content is 5-8%. According to the throat-clearing tea and the preparation method thereof, the raw materials are scientifically and reasonably matched, the preparation process is advanced, and the throat-clearing tea is remarkable in throat-clearing effect, safe, free of side effects, appropriate in taste and convenient to store and carry and has important application and popularization value.

Description

Technical Field

[0001] This invention relates to the field of tea-drinking technology, and in particular to a throat-soothing tea and its preparation method. Background Technology

[0002] The throat is an important passageway for breathing and swallowing. With the fast pace of life, increased environmental pollution, and unhealthy lifestyle habits (such as staying up late, overusing the voice, smoking, drinking alcohol, and a preference for spicy and irritating foods), throat discomfort is becoming increasingly common. Common symptoms include dry throat, itchy throat, sore throat, hoarseness, and a feeling of something stuck in the throat. These symptoms not only affect daily life, work, and study, but repeated episodes can also lead to chronic pharyngitis, tonsillitis, and other throat diseases, seriously threatening human health.

[0003] To relieve throat discomfort, various throat-soothing products have appeared on the market, mainly including medicinal products and health teas. Medicinal products such as lozenges, sprays, and traditional Chinese medicines, while effective in relieving acute throat discomfort, mostly contain chemical ingredients. Long-term use may cause side effects, such as oral flora imbalance and drug dependence. Furthermore, some medications have poor taste, leading to low patient compliance.

[0004] Health-promoting tea products have gained widespread popularity among consumers due to their natural, safe, and palatable qualities. However, existing throat-soothing teas on the market have several shortcomings. Firstly, some throat-soothing teas use a single ingredient composition, primarily common ingredients such as honeysuckle, malva nut, and monk fruit, resulting in limited throat-soothing effects. They only provide a mild soothing effect and are insufficient to effectively relieve more severe symptoms like dry throat and sore throat. Secondly, some throat-soothing teas have an unreasonable ingredient combination, failing to fully utilize the synergistic effects between ingredients, leading to poor throat-soothing results. Furthermore, some teas use simple brewing or decocting methods during preparation, failing to effectively extract the active ingredients and resulting in waste. Additionally, the products have poor stability and shelf life, making them unsuitable for long-term storage and sales. Moreover, some throat-soothing teas add large amounts of sugar to improve taste, which is detrimental to blood sugar control with long-term consumption and does not meet modern people's demands for healthy eating.

[0005] Therefore, developing a throat-soothing tea with a scientifically balanced combination of raw materials, sufficient extraction of effective components, significant throat-soothing effect, safety without side effects, suitable taste, and easy storage is of great practical significance and has broad market prospects. Summary of the Invention

[0006] This invention provides a throat-clearing tea and its preparation method, aiming to solve the technical problems of existing tea drinks having a single ingredient composition or unreasonable ingredient combination, resulting in poor throat-clearing effect and failing to meet modern people's demand for healthy eating.

[0007] The present invention is achieved as follows: a throat-clearing tea and its preparation method, which is composed of the following raw materials in parts by weight: 3 parts bamboo leaves, 5 parts belamcanda chinensis, 20 parts clematis, and 7 parts forsythia suspensa. The bamboo leaves mentioned are the dried leaves of Phyllostachys edulis, a plant of the Phyllostachys genus. They are harvested in May and June each year, and after harvesting, they are washed and dried until the moisture content is 8-12%. The iris mentioned is the dried rhizome of the iris plant (Iridaceae family, genus Iridum). It is harvested in autumn. After harvesting, the fibrous roots and impurities are removed, the rhizome is washed, sliced, and dried until the moisture content is 6-10%. The aforementioned Keli Lao refers to the dried tender leaves of the Kuding tea plant, which belongs to the genus Ilex of the Aquifoliaceae family. The harvesting time is from March to April in spring. After harvesting, the leaves are subjected to fixation, rolling, and drying until the moisture content is 5-8%. The aforementioned Forsythia suspensa is the dried fruit of Forsythia suspensa, a plant belonging to the genus Hypericum in the family Clusiaceae. It is harvested in autumn when the fruit is ripe. After harvesting, the fruit stalks and impurities are removed, and the fruit is dried until the moisture content is 7-9%.

[0008] Preferably, the bamboo leaves need to be selected before drying to remove yellowed, rotten, or diseased leaves; the thickness of the sliced ​​Belamcanda chinensis is 2-3 mm; the blanching temperature of the Keli Lao (a type of medicinal herb) is 180-200℃, the blanching time is 2-3 min, the rolling time is 15-20 min, and the drying temperature is 80-90℃; the Forsythia suspensa needs to be screened after drying to select plump and undamaged fruits.

[0009] Preferably, the throat-clearing tea is in the form of tea bags, granules, tablets, or powders; when the throat-clearing tea is in the form of tea bags, each tea bag weighs 3-5g; when the throat-clearing tea is in the form of granules, the particle size is 0.5-1mm; when the throat-clearing tea is in the form of tablets, each tablet weighs 0.5-1g; when the throat-clearing tea is in the form of powders, the fineness is 80-100 mesh.

[0010] Preferably, the bamboo leaves contain ≥1.5% flavonoids and ≥3.0% polysaccharides; the belamcanda chinensis contains ≥0.8% isoflavones and ≥0.5% alkaloids; the kelp contains ≥15% tea polyphenols and ≥2.0% amino acids; and the forsythosides contains ≥0.3% forsythosides and ≥1.0% flavonoids.

[0011] This invention also proposes a method for preparing a throat-soothing tea, which includes the following steps: S1. Raw material pretreatment S1.1 Bamboo leaf pretreatment: Select qualified dried bamboo leaves. First, select and remove yellowed, rotten, or diseased leaves. Then, put the selected bamboo leaves into a washing device and rinse them with clean water 2-3 times, each time for 5-10 minutes, to remove dust and impurities from the surface of the bamboo leaves. After washing, put the bamboo leaves into a drying yard for natural drying. Turn them over every 2-3 hours during the drying process to ensure that the bamboo leaves dry evenly. Dry until the moisture content of the bamboo leaves is 8-12% and set aside for later use. S1.2 Iridescent treatment: Select the dried rhizomes of Iridescent that meet the requirements, remove the fibrous roots and impurities, and then put them into the washing pool and rinse them with running water 3-4 times, each time for 8-12 minutes. After washing, put the Iridescent rhizomes into a slicer and cut them into thin slices with a thickness of 2-3 mm. Place the cut Iridescent rhizomes on a drying rack for natural drying until the moisture content of the Iridescent rhizomes is 6-10%. S1.3 Keli Lao Pretreatment: Select qualified dried tender leaves of Kuding tea. First, sort them to remove impurities and old leaves. Then, put the sorted Keli Lao into a fixing machine. Set the fixing temperature to 180-200℃ and the fixing time to 2-3 minutes. Stir constantly during the fixing process to ensure that the Keli Lao is heated evenly. After fixing, put the Keli Lao into a rolling machine for rolling. Roll for 15-20 minutes until the Keli Lao forms strips. Then, put the rolled Keli Lao into a drying equipment. Set the drying temperature to 80-90℃ and the drying time to 2-3 hours until the moisture content of the Keli Lao is 5-8%. Set aside for later use. S1.4 Pretreatment of Forsythia suspensa: Select qualified dried Forsythia suspensa fruits, remove the fruit stalks and impurities, and then put them into the washing equipment and rinse them with clean water 2-3 times, each time for 6-8 minutes. After washing, put the Forsythia suspensa into the drying yard for natural sun drying. Turn them over every 3-4 hours during the drying process. Dry them until the moisture content of the Forsythia suspensa is 7-9%. Then screen the dried Forsythia suspensa and select the plump and undamaged fruits for later use. S2, Raw material crushing The bamboo leaves, iris flakes, keriospermum jasminoides, and forsythia suspensa that have undergone pretreatment in step S1 are placed into a pulverizer for pulverization. The bamboo leaves are pulverized to a fineness of 60-80 mesh, the iris flakes to a fineness of 80-100 mesh, the keriospermum jasminoides to a fineness of 40-60 mesh, and the forsythia suspensa to a fineness of 80-100 mesh, to obtain bamboo leaf powder, iris flake powder, keriospermum jasminoides powder, and forsythia suspensa powder. S3, Raw material mixing According to the weight ratio (3 parts bamboo leaves, 5 parts iris, 20 parts kerosene, 7 parts forsythia), weigh the bamboo leaf powder, iris powder, kerosene powder, and forsythia powder obtained in step S2 respectively. Put the weighed four powders into a mixer, set the speed of the mixer to 150-200 r / min, and the mixing time to 30-40 min, so that the four powders are fully mixed and uniform to obtain a mixed powder. S4. Extracting active ingredients S4.1 First extraction: Place the mixed powder obtained in step S3 into an extraction tank, add 8-10 times the weight of the mixed powder in purified water, stir evenly, heat to 85-95℃, and extract for 2-3 hours while maintaining a gentle boil. Stir once every 30 minutes during the extraction process, and each stirring time is 5-10 minutes. After the extraction is completed, filter the mixture using a filtration device (such as a plate and frame filter) and collect the first extract. The filter residue is reserved for later use. S4.2 Second extraction: Add 6-8 times the weight of purified water to the filter residue after the first extraction, stir evenly, heat to 80-90℃, and extract at a gentle boil for 1.5-2.5 hours. Stir once every 25 minutes during the extraction process, and each stirring time is 5-8 minutes. After the extraction is completed, filter again using a filtration device, collect the second extract, and keep the filter residue for later use. S4.3 Third extraction: Add 4-6 times the weight of purified water to the filter residue after the second extraction, stir evenly, heat to 75-85℃, and extract at a gentle boil for 1-2 hours. Stir once every 20 minutes during the extraction process, and each stirring time is 3-5 minutes. After the extraction is completed, filter using a filtration device, collect the third extract, and discard the filter residue. S4.4 Combine the extracts: Combine the first, second, and third extracts to obtain the total extract; S5, Extract Concentration The total extract obtained in step S4 is placed in a concentration device (such as a vacuum concentration tank), the concentration temperature is set to 60-70℃ and the vacuum degree is 0.06-0.08MPa, and vacuum concentration is carried out. During the concentration process, the mixture is stirred continuously to prevent the extract from sticking to the bottom. The extract is concentrated until the relative density is 1.15-1.25 (measured at 25℃) to obtain the concentrate. S6. Drying treatment The concentrated liquid obtained in step S5 is placed in a drying device for drying. If granules or powders are to be prepared, spray drying is used, with the inlet air temperature set at 180-200℃, the outlet air temperature at 80-90℃, and the atomization pressure at 0.2-0.3MPa, until the moisture content of the material is 3-5%, resulting in dried powder. If tablets are to be prepared, the concentrated liquid is first dried using a vacuum drying method, with the drying temperature set at 50-60℃ and the vacuum degree at 0.07-0.09MPa, until the moisture content of the material is 4-6%, resulting in dried blocks. The dried blocks are then pulverized to a fineness of 80-100 mesh to obtain dried powder. If tea bags are to be prepared, the mixed powder obtained in step S3 can be directly dried using a hot air drying method, with the drying temperature set at 70-80℃ and the drying time at 2-3 hours, until the moisture content of the mixed powder is 3-5%. S7. Molded Packaging S7.1 Preparation of tea bags: Weigh the mixed powder dried in step S6 according to the weight of 3-5g per tea bag, and then use an automatic packaging machine to pack it into filter tea bags, seal the packaging, and obtain throat-clearing tea bags; S7.2 Preparation of granules: The dried powder obtained in step S6 is placed into a granulator, and an appropriate amount of binder (such as hydroxypropyl methylcellulose solution, concentration of 5-8%) is added. The granulator speed is set to 100-150 r / min to make wet granules with a particle size of 0.5-1 mm. Then the wet granules are placed into a fluidized bed dryer, and the drying temperature is set to 60-70℃. The drying time is 1-2 h until the moisture content of the wet granules is 3-5%, and dry granules are obtained. Finally, the dry granules are packaged using an automatic packaging machine, with each bag weighing 5-10 g, and sealed to obtain throat-clearing tea granules. S7.3 Tablet Preparation: The dried powder obtained in step S6 is mixed evenly with an appropriate amount of excipients (including lactose as filler, amounting to 10-15% of the weight of the dried powder; crospovidone as disintegrant, amounting to 3-5% of the weight of the dried powder; and magnesium stearate as lubricant, amounting to 0.5-1% of the weight of the dried powder) to obtain a tablet mixture. The tablet mixture is placed in a tablet press, and the tableting pressure is set to 15-20 MPa to compress tablets with a weight of 0.5-1 g per tablet. Then, the tablets are coated with a film using a coating pan (the coating material is hydroxypropyl methylcellulose, concentration of 8-10%) at a coating temperature of 40-50℃ for 30-40 min. After coating, the tablets are packaged using an aluminum-plastic blister packaging machine to obtain throat-clearing tea tablets. S7.4 Preparation of powder: The dried powder obtained in step S6 is sieved using a sieving device to ensure that the powder fineness is 80-100 mesh. Then, it is weighed according to the weight of 3-5g per bag, and packaged and sealed using an automatic packaging machine to obtain the throat-clearing tea powder.

[0012] Preferably, the cleaning equipment mentioned in step S1 is a bubble cleaning machine, and a sunshade should be set up in the drying area to avoid direct sunlight causing the loss of effective components in the raw materials; the slicing machine is a rotary slicing machine, and the slice thickness can be controlled by adjusting the blade spacing of the slicing machine; the kneading machine is a roller kneading machine, and the kneading pressure can be adjusted according to the texture of the raw materials to ensure the kneading effect.

[0013] Preferably, the pulverizer mentioned in step S2 is a universal pulverizer. During the pulverizing process, the pulverizing speed of the pulverizer needs to be controlled. The pulverizing speed of bamboo leaves is 1200-1500 r / min, the pulverizing speed of Belamcanda chinensis flakes is 1500-1800 r / min, the pulverizing speed of Kelp is 1000-1200 r / min, and the pulverizing speed of Forsythia suspensa is 1500-1800 r / min, to prevent the raw material temperature from being too high due to excessive pulverizing speed, which would damage the effective components.

[0014] Preferably, the extraction tank in step S4 is a multi-functional extraction tank, equipped with a stirring device and a heating device, and the heating method is steam heating; the filter medium of the filtration device is a stainless steel filter screen with a mesh size of 100-120 mesh, and a certain filtration pressure (0.1-0.15MPa) needs to be maintained during the filtration process to improve the filtration efficiency and prevent the filter residue from clogging the filter screen.

[0015] Preferably, the vacuum concentration tank in step S5 is equipped with a stirring device and a temperature and vacuum control system. During the concentration process, the relative density of the extract needs to be checked periodically. When the relative density reaches 1.15-1.25, the concentration is stopped. If foaming occurs in the extract during the concentration process, an appropriate amount of defoamer (such as polydimethylsiloxane, at a dosage of 0.01-0.03% of the total weight of the extract) can be added to ensure the smooth progress of the concentration process.

[0016] Preferably, in step S7, when preparing granules, the hydroxypropyl methylcellulose (HPMC) binder solution is prepared by: slowly adding HPMC to purified water while stirring at a speed of 300-500 r / min for 30-40 min until the HPMC is completely dissolved, resulting in a 5-8% HPMC solution; when preparing tablets, the excipient mixing process is carried out in a mixer at a speed of 150-200 r / min for 20-30 min to ensure that the excipients and dry powder are fully and evenly mixed.

[0017] Compared with related technologies, the throat-clearing tea and its preparation method provided by this invention have the following beneficial effects: 1. Scientific ingredient combination for significant throat-soothing effect: This throat-soothing tea is made from four natural ingredients: bamboo leaves, Belamcanda chinensis, Clematis chinensis, and Forsythia suspensa, with strict control over the proportions of each ingredient (3 parts bamboo leaves, 5 parts Belamcanda chinensis, 20 parts Clematis chinensis, and 7 parts Forsythia suspensa). Bamboo leaves are sweet and bland in taste, and cold in nature, possessing the effects of clearing heat and promoting body fluid production, relieving irritability and thirst, and soothing the throat and reducing swelling. Its flavonoids and polysaccharides enhance the body's antioxidant capacity and reduce inflammation of the throat mucosa. Belamcanda chinensis is bitter and cold in nature, and enters the lung meridian, possessing the effects of detoxifying and soothing the throat, clearing heat and resolving phlegm. Its isoflavones and alkaloids have a good inhibitory effect on bacteria (such as Staphylococcus aureus and Streptococcus) and viruses that cause throat inflammation, and can quickly relieve symptoms such as sore throat and itchy throat. Clematis chinensis (also known as "Clematis chinensis")... "Kuding tea" (specifically referring to a particular variety of Kuding tea raw material) has a sweet and bitter taste and is cool in nature. It has the effects of clearing heat and reducing fire, promoting body fluid and quenching thirst, and soothing the throat. Its tea polyphenols, amino acids, vitamins and other components can moisturize the throat mucosa, improve symptoms such as dry throat and hoarseness, and at the same time enhance the body's immunity and prevent the recurrence of throat diseases. Forsythia has a bitter taste and is cool in nature. It has the effects of clearing heat and detoxifying, reducing swelling and dissipating nodules. Its forsythosides, flavonoids and other components can promote blood circulation in the throat, reduce throat swelling, and accelerate the resolution of inflammation. The four raw materials work together to clear heat, detoxify, soothe the throat, moisturize the throat, reduce inflammation, and fight bacteria. It can quickly and effectively relieve various throat discomfort symptoms and also has a certain auxiliary therapeutic effect on throat diseases such as chronic pharyngitis and tonsillitis. Its throat-clearing effect is far superior to existing throat-clearing tea products with single raw materials or unreasonable combinations.

[0018] 2. Safe and without side effects, suitable for a wide range of people: The bamboo leaves, Belamcanda chinensis, Clematis chinensis, and Forsythia suspensa used in this throat-clearing tea are all medicinal and edible materials or traditional Chinese medicinal herbs. They are naturally sourced, safe, and reliable, and do not contain any artificially synthesized chemical components, preservatives, sweeteners, or other additives. Extensive safety tests have verified that long-term consumption of this throat-clearing tea will not produce any toxic side effects on the human body, nor will it cause problems such as oral flora imbalance or drug dependence. This throat-clearing tea is suitable for people of all ages, including children, adolescents, adults, and the elderly. It is especially suitable for teachers, singers, hosts, and other people who use their voices for long periods, as well as those who frequently smoke and drink alcohol, work overtime late into the night, and live in polluted environments. Its applicability is wide-ranging.

[0019] 3. High Extraction Rate of Effective Components and High Raw Material Utilization: The preparation method of the throat-clearing tea of ​​this invention has been scientifically optimized, employing multiple extraction and concentration processes to fully extract effective components such as flavonoids, polysaccharides, alkaloids, and tea polyphenols from the raw materials. This significantly improves the utilization rate of raw materials and avoids waste. Compared with existing simple brewing or single-stage decoction methods, the preparation method of this invention can significantly increase the content of effective components in the throat-clearing tea, thereby further enhancing its throat-clearing effect. Simultaneously, through specific drying and shaping processes, the effective components can be stably retained in the product, ensuring that the effective components are not easily lost during storage and guaranteeing the product's quality stability.

[0020] 4. Suitable and easy to accept: Some existing throat-soothing teas are too bitter or astringent due to the characteristics of the raw materials or problems with the preparation process, making them difficult for consumers to accept. This invention's throat-soothing tea, through a reasonable ratio of raw materials and specific preparation processes (such as adjusting extraction time and temperature, and adopting appropriate molding methods), improves the product's taste while ensuring its throat-soothing effect. The throat-soothing tea has a light herbal aroma, a mellow and slightly sweet taste, and no obvious bitterness or astringency, making it easily accepted and loved by a wide range of consumers, thus enhancing the product's market competitiveness.

[0021] 5. Easy to store and carry, convenient to use: This throat-clearing tea uses a specific forming process (such as making it into tea bags, granules, tablets, etc.), resulting in good product sealing, making it less prone to moisture absorption and spoilage, and extending its shelf life (12-24 months under normal storage conditions), facilitating long-term storage. Furthermore, this throat-clearing tea is small in size and lightweight, making it easy to carry. Consumers can brew and drink it anytime, anywhere, such as at home, in the office, or while traveling, making it convenient and quick to use. Attached Figure Description

[0022] Figure 1 The flowchart illustrates a method for preparing a throat-soothing tea provided by this invention. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Example 1: Preparation of Throat-Clearing Tea Bags Step 1: Raw material pretreatment (1) Bamboo leaf pretreatment: Select dried leaves of Phyllostachys edulis (harvested in May), remove yellowed, rotten, or diseased leaves, put the selected bamboo leaves into a bubble washing machine, rinse them twice with clean water for 8 minutes each time, and after washing, put the bamboo leaves into a drying field with a shade structure for natural drying. Turn them over every 2.5 hours during the drying process, and dry them until the moisture content of the bamboo leaves is 10% for later use. (2) Treatment of Belamcanda chinensis: Select the dried rhizomes of Belamcanda chinensis (harvested in autumn), remove the fibrous roots and impurities, put them in a washing pool, rinse them three times with running water, each time for 10 minutes, and after washing, put the Belamcanda chinensis into a rotary slicer, adjust the blade spacing, and cut them into thin slices with a thickness of 2.5 mm. Place the cut Belamcanda chinensis thin slices on a drying rack for natural drying until the moisture content of the Belamcanda chinensis thin slices is 8%, and set aside for later use. (3) Pretreatment of Keli Lao: Select the dried tender leaves of Kuding tea plant (picked in March) of the genus Ilex chinensis of the Aquifoliaceae family, remove impurities and old leaves, put the selected Keli Lao into the fixation machine, set the fixation temperature to 190℃, the fixation time to 2.5min, stir continuously during the fixation process, after the fixation is completed, put the Keli Lao into the drum-type rolling machine, adjust the rolling pressure, the rolling time to 18min, roll until the Keli Lao forms strips, then put the rolled Keli Lao into the drying equipment, set the drying temperature to 85℃, the drying time to 2.5h, dry until the moisture content of the Keli Lao is 6.5%, and set aside for later use; (4) Pretreatment of Forsythia suspensa: Select the dried fruit of Forsythia suspensa, a plant of the genus Hypericum in the family Clusiaceae (harvest time is when the fruit is ripe in autumn), remove the fruit stalk and impurities, put it into a bubble washing machine, rinse it with clean water twice, each rinse time is 7 minutes, after washing, put the Forsythia suspensa into the drying yard for natural sun drying, turn it over once every 3.5 hours during the drying process, dry it until the moisture content of Forsythia suspensa is 8%, and then screen the dried Forsythia suspensa, select the plump and undamaged fruit for later use; Step 2: Raw material crushing Pretreated bamboo leaves were placed in a universal pulverizer, and the pulverizing speed was set to 1350 r / min. The pulverizer was pulverized to a fineness of 70 mesh to obtain bamboo leaf powder. Belamcanda chinensis flakes were placed in the universal pulverizer, and the pulverizing speed was set to 1650 r / min. The pulverizer was pulverized to a fineness of 90 mesh to obtain Belamcanda chinensis powder. Keratinum odoratum was placed in the universal pulverizer, and the pulverizing speed was set to 1100 r / min. The pulverizer was pulverized to a fineness of 50 mesh to obtain Keratinum odoratum powder. Forsythia suspensa was placed in the universal pulverizer, and the pulverizing speed was set to 1650 r / min. The pulverizer was pulverized to a fineness of 90 mesh to obtain Forsythia suspensa powder. Step 3: Mixing raw materials Weigh out 3 kg of bamboo leaf powder, 5 kg of Belamcanda chinensis powder, 20 kg of Clematis chinensis powder, and 7 kg of Forsythia suspensa powder according to the weight ratio. Put the four powders into a mixer, set the mixer speed to 175 r / min and the mixing time to 35 min, so that the four powders are fully mixed evenly to obtain a mixed powder. Step 4: Drying treatment The mixed powder was placed in a hot air drying device, the drying temperature was set to 75℃, the drying time was 2.5 hours, and the powder was dried until the moisture content of the mixed powder was 4%. Step 5: Molding and Packaging The dried mixed powder was weighed at a rate of 4g per tea bag, and then packed into filter tea bags using an automatic packaging machine. The bags were then sealed to obtain throat-clearing tea bags.

[0025] The quality of the throat-clearing tea bags prepared in this embodiment was tested, and the results are as follows: The appearance is a brownish-yellow to brownish-brown powder with no obvious impurities; it has a light herbal fragrance and no off-odor; the flavonoid content in bamboo leaves is 1.7%, and the polysaccharide content is 3.2%; the isoflavone content in Belamcanda chinensis is 0.9%, and the alkaloid content is 0.6%; the polyphenol content in Keli Laozhong tea is 16%, and the amino acid content is 2.2%; the forsythoside content in Forsythia suspensa is 0.4%, and the flavonoid content is 1.1%; the moisture content is 4%; the microbial limits meet the national standards (total bacterial count ≤1000 cfu / g, total mold and yeast count ≤100 cfu / g, coliform bacteria not detected, pathogenic bacteria not detected).

[0026] Example 2: Preparation of Throat-Clearing Tea Granules Step 1: Raw material pretreatment (1) Bamboo leaf pretreatment: Select dried leaves of Phyllostachys edulis (harvested in June), remove yellowed, rotten, diseased and pest-infested leaves, put the selected bamboo leaves into a bubble washing machine, rinse with clean water 3 times, each rinse time is 5 minutes, after washing, put the bamboo leaves into a drying field with a shade canopy for natural drying, turn them over once every 2 hours during the drying process, and dry until the moisture content of the bamboo leaves is 8% for later use. (2) Treatment of Belamcanda chinensis: Select the dried rhizomes of Belamcanda chinensis (harvested in autumn), remove the fibrous roots and impurities, put them in a washing pool, rinse them with running water 4 times, each time for 8 minutes, and after washing, put the Belamcanda chinensis into a rotary slicer, adjust the blade spacing, and cut them into thin slices with a thickness of 2 mm. Place the cut Belamcanda chinensis thin slices on a drying rack for natural drying until the moisture content of the Belamcanda chinensis thin slices is 6%, and set aside for later use. (3) Pretreatment of Keli Lao: Select the dried tender leaves of Kuding tea plant (picked in April), remove impurities and old leaves, put the selected Keli Lao into the fixation machine, set the fixation temperature to 180℃ and the fixation time to 3min, stir continuously during the fixation process, after the fixation is completed, put the Keli Lao into the drum rolling machine, adjust the rolling pressure, and roll for 15min until the Keli Lao forms strips, then put the rolled Keli Lao into the drying equipment, set the drying temperature to 80℃ and the drying time to 3h, dry until the moisture content of the Keli Lao is 5%, and set aside for later use; (4) Pretreatment of Forsythia suspensa: Select the dried fruit of Forsythia suspensa, a plant of the genus Hypericum in the family Clusiaceae (harvest time is when the fruit is ripe in autumn), remove the fruit stalk and impurities, put it into a bubble washing machine, rinse it with clean water 3 times, each rinse time is 6 minutes, after washing, put the Forsythia suspensa into the drying yard for natural sun drying, turn it over once every 3 hours during the sun drying process, and dry it until the moisture content of the Forsythia suspensa is 7%, then screen the dried Forsythia suspensa, select the plump and undamaged fruit for later use. Step 2: Raw material crushing Pretreated bamboo leaves were placed in a universal pulverizer, and the pulverizing speed was set to 1200 r / min. The pulverizer was pulverized to a fineness of 60 mesh to obtain bamboo leaf powder. Belamcanda chinensis flakes were placed in the universal pulverizer, and the pulverizing speed was set to 1500 r / min. The pulverizer was pulverized to a fineness of 80 mesh to obtain Belamcanda chinensis powder. Keratinum odoratum was placed in the universal pulverizer, and the pulverizing speed was set to 1000 r / min. The pulverizer was pulverized to a fineness of 40 mesh to obtain Keratinum odoratum powder. Forsythia suspensa was placed in the universal pulverizer, and the pulverizing speed was set to 1500 r / min. The pulverizer was pulverized to a fineness of 80 mesh to obtain Forsythia suspensa powder. Step 3: Mixing raw materials Weigh out 3 kg of bamboo leaf powder, 5 kg of Belamcanda chinensis powder, 20 kg of Kelp powder, and 7 kg of Forsythia suspensa powder according to the weight ratio. Put the four powders into a mixer, set the mixer speed to 150 r / min and the mixing time to 40 min, so that the four powders are fully mixed evenly to obtain a mixed powder. Step 4: Extracting the active ingredients (1) First extraction: Put the mixed powder into a multi-functional extraction tank, add purified water at 8 times the weight of the mixed powder, stir evenly, heat with steam to 85°C, maintain a slight boiling state for 3 hours, stir once every 30 minutes during the extraction process, and each stirring time is 5 minutes. After the extraction is completed, filter with a plate and frame filter (100 mesh filter) at a pressure of 0.1 MPa, collect the first extract, and keep the filter residue for later use. (2) Second extraction: Add purified water at 6 times the weight of the filter residue after the first extraction to the filter residue, stir evenly, heat to 80°C, and extract for 2.5 hours while maintaining a slight boiling state. Stir once every 25 minutes during the extraction process, and each stirring time is 5 minutes. After the extraction is completed, filter again using a plate and frame filter press, collect the second extract, and keep the filter residue for later use. (3) Third extraction: Add purified water at 4 times the weight of the filter residue after the second extraction to the filter residue, stir evenly, heat to 75°C, and extract for 2 hours while maintaining a slight boiling state. Stir once every 20 minutes during the extraction process, and each stirring time is 3 minutes. After the extraction is completed, filter with a plate and frame filter press, collect the third extract, and discard the filter residue. (4) Combining the extracts: Combine the first, second and third extracts to obtain the total extract; Step 5: Concentrate the extract The total extract was placed in a vacuum concentration tank, and the concentration temperature was set to 60℃ and the vacuum degree to 0.06MPa for vacuum concentration. During the concentration process, the mixture was stirred continuously, and the relative density of the extract was checked periodically. When the relative density reached 1.15 (25℃), the concentration was stopped, and the concentrated liquid was obtained. A small amount of foaming occurred during the concentration process. 0.01% of polydimethylsiloxane defoamer by weight of the total extract was added, and the foaming disappeared. Step 6: Drying treatment The concentrate is placed in a spray drying device, the inlet air temperature is set to 180℃, the outlet air temperature is set to 80℃, and the atomization pressure is set to 0.2MPa. Spray drying is carried out until the moisture content of the material is 3%, and dry powder is obtained. Step 7: Molding and Packaging (1) Preparation of adhesive: Hydroxypropyl methylcellulose is slowly added to purified water while stirring at a speed of 300 r / min for 40 min until the hydroxypropyl methylcellulose is completely dissolved to obtain a 5% hydroxypropyl methylcellulose solution. (2) Granulation: Place the dry powder into a granulator, add an appropriate amount of 5% hydroxypropyl methylcellulose solution as a binder, set the granulator speed to 100 r / min, and make wet granules with a particle size of 0.5 mm. (3) Drying: Place the wet granules into a fluidized bed dryer, set the drying temperature to 60℃, and the drying time to 2h, until the moisture content of the wet granules is 3%, and dry granules are obtained. (4) Packaging: The dry granules are packaged using an automatic packaging machine, with each bag weighing 5g and sealed to obtain throat-clearing tea granules.

[0027] The quality of the throat-clearing tea granules prepared in this embodiment was tested, and the results are as follows: The granules are pale yellow to yellow in appearance, uniform in size, and without clumping; they have a herbal aroma and a slightly sweet taste; the flavonoid content in bamboo leaves is 1.6%, and the polysaccharide content is 3.1%; the isoflavone content in Belamcanda chinensis is 0.85%, and the alkaloid content is 0.55%; the polyphenol content in Keli Laozhong tea is 15.5%, and the amino acid content is 2.1%; the forsythoside content in Forsythia suspensa is 0.35%, and the flavonoid content is 1.05%; the moisture content is 3%; and the microbial limits meet national standards.

[0028] Example 3: Preparation of throat-clearing tea tablets Step 1: Raw material pretreatment (1) Bamboo leaf pretreatment: Select dried leaves of Phyllostachys edulis (harvested in May), remove yellowed, rotten, diseased and pest-infested leaves, put the selected bamboo leaves into a bubble washing machine, rinse them twice with clean water, each rinse lasting 10 minutes. After washing, put the bamboo leaves into a drying field with a shade structure for natural drying. Turn them over every 3 hours during the drying process, and dry them until the moisture content of the bamboo leaves is 12% for later use. (2) Treatment of Belamcanda chinensis: Select dried rhizomes of Belamcanda chinensis (harvested in autumn) of plants belonging to the genus Belamcanda of the family Iridaceae. Remove fibrous roots and impurities, place them in a washing pool, and rinse them three times with running water for 12 minutes each time. After washing, place the Belamcanda chinensis in a rotary slicer, adjust the blade spacing, and cut them into thin slices with a thickness of 3 mm. Place the cut Belamcanda chinensis slices on a drying rack for natural drying until the moisture content of the Belamcanda chinensis slices is 10%. (3) Pretreatment of Keli Lao: Select the dried tender leaves of Kuding tea plant (harvested in March) of the genus Ilex chinensis of the Aquifoliaceae family. Remove impurities and old leaves. Put the selected Keli Lao into the fixation machine. Set the fixation temperature to 200℃ and the fixation time to 2min. Stir continuously during the fixation process. After the fixation is completed, put the Keli Lao into the drum-type rolling machine. Adjust the rolling pressure and the rolling time to 20min. Roll until the Keli Lao forms strips. Then put the rolled Keli Lao into the drying equipment. Set the drying temperature to 90℃ and the drying time to 2h. Dry until the moisture content of the Keli Lao is 8%. Set aside for later use. (4) Pretreatment of Forsythia suspensa: Select the dried fruit of Forsythia suspensa, a plant of the genus Hypericum in the family Clusiaceae (harvest time is when the fruit is ripe in autumn), remove the fruit stalk and impurities, put it into a bubble washing machine, rinse it with clean water twice, each rinse time is 8 minutes, after washing, put the Forsythia suspensa into the drying yard for natural sun drying, turn it over once every 4 hours during the sun drying process, and dry it until the moisture content of the Forsythia suspensa is 9%, then screen the dried Forsythia suspensa, select the plump and undamaged fruit for later use; Step 2: Raw material crushing Pretreated bamboo leaves were placed in a universal pulverizer, and the pulverizing speed was set to 1500 r / min. The pulverizer was pulverized to a fineness of 80 mesh to obtain bamboo leaf powder. Belamcanda chinensis flakes were placed in the universal pulverizer, and the pulverizing speed was set to 1800 r / min. The pulverizer was pulverized to a fineness of 100 mesh to obtain Belamcanda chinensis powder. Keratinum odoratum was placed in the universal pulverizer, and the pulverizing speed was set to 1200 r / min. The pulverizer was pulverized to a fineness of 60 mesh to obtain Keratinum odoratum powder. Forsythia suspensa was placed in the universal pulverizer, and the pulverizing speed was set to 1800 r / min. The pulverizer was pulverized to a fineness of 100 mesh to obtain Forsythia suspensa powder. Step 3: Mixing raw materials Weigh out 3 kg of bamboo leaf powder, 5 kg of Belamcanda chinensis powder, 20 kg of Clematis chinensis powder, and 7 kg of Forsythia suspensa powder according to the weight ratio. Put the four powders into a mixer, set the mixer speed to 200 r / min and the mixing time to 30 min, so that the four powders are fully mixed evenly to obtain a mixed powder. Step 4: Extracting the active ingredients (1) First extraction: Put the mixed powder into a multi-functional extraction tank, add purified water at 10 times the weight of the mixed powder, stir evenly, heat with steam to 95°C, maintain a slight boiling state for 2 hours, stir once every 30 minutes during the extraction process, and each stirring time is 10 minutes. After the extraction is completed, filter with a plate and frame filter (120 mesh filter) at a pressure of 0.15 MPa, collect the first extract, and keep the filter residue for later use; (2) Second extraction: Add purified water at 8 times the weight of the filter residue after the first extraction to the filter residue, stir evenly, heat to 90°C, and extract for 1.5 hours while maintaining a slight boiling state. Stir once every 25 minutes during the extraction process, and each stirring time is 8 minutes. After the extraction is completed, filter again using a plate and frame filter press, collect the second extract, and keep the filter residue for later use. (3) Third extraction: Add purified water at 6 times the weight of the filter residue after the second extraction to the filter residue, stir evenly, heat to 85°C, and extract for 1 hour at a slight boiling state. Stir once every 20 minutes during the extraction process, and each stirring time is 5 minutes. After the extraction is completed, filter with a plate and frame filter press, collect the third extract, and discard the filter residue. (4) Combining the extracts: Combine the first, second and third extracts to obtain the total extract; Step 5: Concentrate the extract The total extract was placed in a vacuum concentration tank, the concentration temperature was set to 70℃ and the vacuum degree to 0.08MPa, and the concentration was carried out under reduced pressure. During the concentration process, the mixture was stirred continuously, and the relative density of the extract was checked periodically. When the relative density reached 1.25 (25℃), the concentration was stopped, and the concentrated liquid was obtained. Step 6: Drying treatment The concentrate was placed in a vacuum drying device, the drying temperature was set to 60℃ and the vacuum degree to 0.09MPa, and vacuum drying was carried out until the moisture content of the material was 6%, resulting in dried blocks. The dried blocks were then placed in a universal pulverizer and pulverized to a fineness of 100 mesh to obtain dried powder. Step 7: Molding and Packaging (1) Mixing of excipients: Weigh 10 kg of dry powder, add 1.5 kg of lactose (15% of the weight of dry powder) as filler, 0.5 kg of crospovidone (5% of the weight of dry powder) as disintegrant, and 0.1 kg of magnesium stearate (1% of the weight of dry powder) as lubricant. Put the above materials into a mixer, set the mixer speed to 200 r / min, and the mixing time to 30 min to obtain a tablet mixture; (2) Tableting: The tablet mixture is placed in a tablet press, the tableting pressure is set to 20 MPa, and the tablets are compressed into tablets with a weight of 1 g each; (3) Coating: The tablets were coated with a coating pan using a 10% hydroxypropyl methylcellulose solution. The coating temperature was set at 50°C and the coating time was 40 min to obtain coated tablets. (4) Packaging: The coated tablets are packaged using an aluminum-plastic blister packaging machine to obtain throat-clearing tea tablets.

[0029] The quality of the throat-clearing tea tablets prepared in this embodiment was tested, and the results are as follows: The tablets are pale yellow coated with a smooth surface, free of spots and cracks; they have a herbal aroma and a good taste; the flavonoid content in bamboo leaves is 1.8%, and the polysaccharide content is 3.3%; the isoflavone content in Belamcanda chinensis is 1.0%, and the alkaloid content is 0.7%; the polyphenol content in Keli Laozhong tea is 17%, and the amino acid content is 2.3%; the forsythoside content in Forsythia suspensa is 0.5%, and the flavonoid content is 1.2%; the moisture content is 5%; and the microbial limits meet national standards.

[0030] Example 4: Preparation of Throat-Clearing Tea Powder Step 1: Raw material pretreatment The raw material pretreatment steps are the same as in Example 2; Step 2: Raw material crushing The raw material crushing steps are the same as in Example 2; Step 3: Mixing raw materials The raw material mixing steps are the same as in Example 2; Step 4: Extracting the active ingredients The steps for extracting the active ingredient are the same as in Example 2; Step 5: Concentrate the extract The extraction concentration step is the same as in Example 2; Step 6: Drying treatment The concentrated liquid is placed in a spray drying device, the inlet air temperature is set to 200℃, the outlet air temperature is set to 90℃, and the atomization pressure is set to 0.3MPa. Spray drying is carried out until the material moisture content is 5%, and dry powder is obtained. The dry powder is then sieved using a sieving device to ensure that the powder fineness is 100 mesh. Step 7: Molding and Packaging The sieved dry powder was weighed into 5g packets, packaged using an automatic packaging machine, and sealed to obtain throat-clearing tea powder.

[0031] The quality of the throat-clearing tea powder prepared in this embodiment was tested, and the results are as follows: the appearance is a light yellow powder, fine and uniform, without impurities; it has a herbal fragrance and a slightly sweet taste; the content of all effective ingredients and the microbial limits all meet the requirements.

[0032] Clinical application efficacy trial

[0033] To verify the throat-clearing effect of the throat-clearing tea of ​​the present invention, 200 volunteers with varying degrees of throat discomfort symptoms (dry throat, itchy throat, sore throat, hoarseness, foreign body sensation) were randomly divided into 4 groups of 50 people each. They drank the throat-clearing tea products prepared in Examples 1-4 of the present invention 3 times a day, each time drinking 1 serving (1 tea bag, 1 granule bag, 1 tablet, 1 powder bag), brewed or taken with 200-300ml of warm water, for 7 consecutive days. The improvement of the volunteers' throat discomfort symptoms was observed and recorded.

[0034] Efficacy assessment criteria Significant effect: Symptoms of throat discomfort such as dry throat, itchy throat, sore throat, hoarseness, and foreign body sensation completely disappear; Effective: Significantly reduces throat discomfort symptoms such as dry throat, itchy throat, sore throat, hoarseness, and a foreign body sensation; Ineffective: Symptoms of throat discomfort such as dry throat, itchy throat, sore throat, hoarseness, and foreign body sensation do not improve significantly or worsen.

[0035] Test results The above test results show that the overall effectiveness of the throat-clearing tea of ​​this invention reaches over 94%. Group Product Type Number of people with significant effects Number of valid participants (people) Invalid number of people Overall effectiveness (%) Group 1 Throat-Clearing Tea Bag (Example 1) 32 16 2 96 2 groups Throat-clearing tea granules (Example 2) 30 17 3 94 3 groups Throat-clearing tea tablets (Example 3) 35 14 1 98 4 groups Throat-Clearing Tea Powder (Example 4) 31 18 1 98 The overall effective rate of the tablets and powders reached as high as 98%, indicating that the throat-clearing tea of ​​this invention can quickly and effectively relieve throat discomfort symptoms and has a significant throat-clearing effect. Furthermore, no adverse reactions were observed in any of the volunteers during the experiment, indicating that the throat-clearing tea of ​​this invention is safe and has no side effects.

[0036] In summary, the throat-soothing tea and its preparation method provided by this invention have a scientific and reasonable combination of raw materials, an advanced preparation process, and the product has a significant throat-soothing effect, is safe and has no side effects, has a pleasant taste, and is easy to store and carry, thus having important value for promotion and application.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A throat-clearing tea, characterized by, By the following weight parts of raw materials consist of: Bamboo leaves 3 parts, Belamcanda 5 parts, Kri old 20 parts, soil Lianqiao 7 parts; Among them, the bamboo leaves are dry leaves of Phyllostachys nigra (Linn.) Wendl, the picking time is from May to June every year, and after picking, it is cleaned and dried to a water content of 8-12%; The Belamcanda is the dry rhizome of Belamcanda chinensis DC. of the Iridaceae Belamcanda, the harvesting time is autumn, after harvesting, the root hairs and impurities are removed, washed, sliced, and dried to a water content of 6-10%; The Kri old is the dry tender leaves of Ilex kachirga Hook. f. of the Aquifoliaceae Ilex, the picking time is from March to April in spring, and after picking, it is blanched, twisted, and dried to a water content of 5-8%; The soil Lianqiao is the dry fruit of Hypericum japonicum Thunb. of the Guttangaceae Hypericum, the harvesting time is when the fruit matures in autumn, and after harvesting, the fruit stalks and impurities are removed and dried to a water content of 7-9%.

2. The throat tea according to claim 1, characterized in that, The bamboo leaves need to be selected before drying, removing yellow, rotten, and diseased leaves; The thickness of the Belamcanda slices is 2-3mm; The blanching temperature of the Kri old is 180-200℃, the blanching time is 2-3min, the twisting time is 15-20min, and the drying temperature is 80-90℃; The soil Lianqiao needs to be screened after drying, selecting fruits with full granules and no damage.

3. The throat tea according to claim 1, characterized in that, The form of the throat-clearing tea is any one of tea bags, granules, tablets or powders; When the throat-clearing tea is in the form of tea bags, the weight of each tea bag is 3-5g; When the throat-clearing tea is in the form of granules, the particle size of the granules is 0.5-1mm; When the throat-clearing tea is in the form of tablets, the weight of each tablet is 0.5-1g; When the throat-clearing tea is in the form of powder, the fineness is 80-100 mesh.

4. The throat tea according to claim 1, wherein The content of flavonoids in the bamboo leaves is ≥1.5%, the content of polysaccharides is ≥3.0%; The content of isoflavones in the Belamcanda is ≥0.8%, the content of alkaloids is ≥0.5%; The content of tea polyphenols in the Kri old is ≥15%, the content of amino acids is ≥2.0%; The content of forsythoside in the soil Lianqiao is ≥0.3%, the content of flavonoids is ≥1.0%.

5. A method of preparing a throat clearing tea, characterized by, The method is used for preparing the throat-clearing tea as claimed in any one of claims 1-4, and the preparation method of the throat-clearing tea comprises the following steps: S1, raw material pretreatment S1.1 Bamboo leaf pretreatment: select the dry leaves of Phyllostachys nigra (Linn.) Wendl. that meet the requirements, first remove yellow, rotten, and diseased leaves, then put the selected bamboo leaves into a cleaning device and rinse with clean water for 2-3 times, each time for 5-10min, to remove dust and impurities on the surface of the bamboo leaves, after cleaning, put the bamboo leaves into a drying field for natural drying, turn them over every 2-3h during the drying process to dry the bamboo leaves evenly, dry to a water content of 8-12%, and reserve; S1.2 Dry rhizome intervention treatment: select the required dry rhizome, remove the root, impurities, and then put into the cleaning pool, rinse with flowing water 3-4 times, each time for 8-12 min, after washing, put the dry rhizome into the slicer, cut into 2-3 mm thick slices, put the cut dry rhizome slices on the airing rack for natural airing, air dry to 6-10% moisture content, ready for use; S1.3 Keli old pretreatment: select the required dry tender leaves of Kuding tea, first select, remove impurities, old leaves, then put the selected Keli old into the fixation machine, set the fixation temperature to 180-200℃, fixation time for 2-3 min, continuously stirring during fixation, so that the Keli old is evenly heated, after fixation, put the Keli old into the rolling machine for rolling, rolling time for 15-20 min, roll the Keli old into strip shape, then put the rolled Keli old into the drying equipment, set the drying temperature to 80-90℃, drying time for 2-3 h, dry to 5-8% moisture content, ready for use; S1.4 Dry fruit intervention treatment: select the required dry fruit of soil lonicera, remove the fruit stem, impurities, then put into the cleaning equipment, rinse with water 2-3 times, each time for 6-8 min, after washing, put the soil lonicera into the airing field for natural drying, turn over every 3-4 h during drying, dry to 7-9% moisture content, then screen the dried soil lonicera, select the fruit with full grains and no damage, ready for use; S2, raw material crushing Put the bamboo leaves, dry rhizome slices, Keli old and soil lonicera pretreated in step S1 into the crusher respectively, crush the bamboo leaves to a fineness of 60-80 mesh, the dry rhizome slices to a fineness of 80-100 mesh, the Keli old to a fineness of 40-60 mesh, and the soil lonicera to a fineness of 80-100 mesh, to obtain bamboo leaf powder, dry rhizome powder, Keli old powder and soil lonicera powder; S3, raw material mixing According to the weight ratio, bamboo leaf powder, dry rhizome powder, Keli old powder and soil lonicera powder obtained in step S2 are weighed and put into the mixing machine, the rotating speed of the mixing machine is set to 150-200 r / min, and the mixing time is 30-40 min, so that the four powders are fully mixed and uniform, to obtain mixed powder; S4, extract effective component S4.1 First extraction: put the mixed powder obtained in step S3 into the extraction tank, add 8-10 times the weight of the mixed powder of purified water, stir uniformly, heat to 85-95℃, keep boiling state for 2-3 h, stir every 30 min during extraction, each time for 5-10 min, after extraction, filter with filter equipment, collect the first extraction liquid, and reserve the filter residue; S4.2 Second extraction: add purified water to the residue after the first extraction, the weight of the purified water is 6-8 times the weight of the residue, stir evenly, heat to 80-90℃, keep boiling state for 1.5-2.5h, stir every 25min during the extraction, each time for 5-8min, after the extraction, filter again, collect the second extraction liquid, and reserve the residue; S4.3 Third extraction: add purified water to the residue after the second extraction, the weight of the purified water is 4-6 times the weight of the residue, stir evenly, heat to 75-85℃, keep boiling state for 1-2h, stir every 20min during the extraction, each time for 3-5min, after the extraction, filter, collect the third extraction liquid, and discard the residue; S4.4 Combine the extraction liquids: combine the first, second and third extraction liquids to obtain the total extraction liquid; S5, Concentrate the extraction liquid Put the total extraction liquid obtained in step S4 into a concentration device, set the concentration temperature to 60-70℃, and the vacuum degree to 0.06-0.08MPa, and perform vacuum concentration, constantly stir during the concentration to prevent the extraction liquid from sticking to the bottom, concentrate to a relative density of 1.15-1.25, and obtain a concentrated liquid; S6, Dry treatment Put the concentrated liquid obtained in step S5 into a drying device for drying treatment, if preparing granules or powders, use spray drying, set the inlet air temperature to 180-200℃, the outlet air temperature to 80-90℃, and the atomization pressure to 0.2-0.3MPa, dry to a moisture content of 3-5%, and obtain dry powder; if preparing tablets, first dry the concentrated liquid by vacuum drying, set the drying temperature to 50-60℃, and the vacuum degree to 0.07-0.09MPa, dry to a moisture content of 4-6%, obtain a dry block, crush the dry block to a fineness of 80-100mesh, and obtain dry powder; if preparing tea bags, directly dry the mixed powder obtained in step S3 by hot air drying, set the drying temperature to 70-80℃, and the drying time to 2-3h, dry to a moisture content of 3-5%; S7, Forming and packaging S7.1 Prepare tea bags: weigh the mixed powder after drying in step S6 according to a weight of 3-5g per tea bag, then use an automatic packaging machine to pack it into filter bags, seal and package, and obtain Qingyan tea tea bags; S7.2 Prepare granules: put the dry powder obtained in step S6 into a granulator, add an appropriate amount of binder, set the rotation speed of the granulator to 100-150r / min, and prepare wet granules with a particle size of 0.5-1mm, then put the wet granules into a boiling dryer, set the drying temperature to 60-70℃, and the drying time to 1-2h, dry to a moisture content of 3-5%, obtain dry granules, finally use an automatic packaging machine to package the dry granules, each bag weighs 5-10g, seal and package, and obtain Qingyan tea granules; S7.3 Preparation of tablets: the dry powder obtained in step S6 is mixed with an appropriate amount of excipients to obtain a tablet mixture, and the tablet mixture is placed in a tablet press, and the tablet pressing pressure is set to 15-20 MPa to press into tablets with a weight of 0.5-1 g per tablet. Then, the tablets are coated with a film coating using a coating kettle, and the coating temperature is 40-50°C, and the coating time is 30-40 min. After the coating is completed, the tablets are packaged using an aluminum plastic blister packaging machine to obtain Qingyan tea tablets; S7.4 Preparation of powder: the dry powder obtained in step S6 is sieved using a sieving device to ensure that the powder fineness is 80-100 mesh, and then weighed according to a weight of 3-5 g per bag, and then packaged using an automatic packaging machine, and sealed to obtain Qingyan tea powder.

6. The throat tea according to claim 1, wherein, The cleaning equipment in step S1 is a bubble cleaning machine, and a sunshade shed needs to be built to avoid direct sunlight causing the loss of effective ingredients in the raw materials. The slicing machine is a rotary slicing machine, and the thickness of the slices can be controlled by adjusting the blade spacing of the slicing machine. The rubbing machine is a drum rubbing machine, and the rubbing pressure can be adjusted according to the texture of the Keli to ensure the rubbing effect.

7. The throat tea according to claim 1, wherein, The pulverizer in step S2 is a universal pulverizer, and the pulverizing speed of the pulverizer needs to be controlled during the pulverizing process. The pulverizing speed of the bamboo leaf is 1200-1500 r / min, the pulverizing speed of the thin slice of Belamcanda chinensis is 1500-1800 r / min, the pulverizing speed of the Keli is 1000-1200 r / min, and the pulverizing speed of the Fructus Forsythiae is 1500-1800 r / min.

8. The throat tea according to claim 1, wherein, The extraction tank in step S4 is a multifunctional extraction tank with stirring device and heating device, and the heating method is steam heating. The filter medium of the filter equipment is a stainless steel filter screen with a mesh size of 100-120 mesh, and a certain filtration pressure needs to be maintained during the filtration process.

9. The throat tea according to claim 1, wherein, The reduced pressure concentration tank in step S5 has a stirring device and a temperature and vacuum degree control system, and the relative density of the extract needs to be detected periodically during the concentration process. When the relative density reaches 1.15-1.25, the concentration is stopped. If the extract foams during the concentration process, an appropriate amount of defoaming agent can be added to ensure the smooth progress of the concentration process.

10. The throat tea according to claim 1, wherein, In step S7, when preparing granules, the preparation method of the binder hydroxypropyl methyl cellulose solution is as follows: hydroxypropyl methyl cellulose is slowly added to purified water while stirring at a speed of 300-500 r / min for 30-40 min until the hydroxypropyl methyl cellulose is completely dissolved to obtain a hydroxypropyl methyl cellulose solution with a concentration of 5-8%. When preparing tablets, the excipient mixing process needs to be carried out in a mixer, and the mixer speed is 150-200 r / min, and the mixing time is 20-30 min to ensure that the excipients and dry powder are thoroughly mixed and evenly distributed.

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