Portable fresh tea leaf aroma sampling device

Abstract

The invention relates to a portable fresh tea leaf aroma sampling device, and belongs to the technical field of tea leaf aroma extraction. The FEP gas collecting bag, the atmosphere sampling instrument, the airflow meter, the air filtering device, the aroma adsorption column and the micro gas pump are sequentially communicated through a gas guide hose, and the micro gas pump is communicated with the FEP gas collecting bag through the gas guide hose; the storage battery is electrically connected with the atmosphere sampling instrument and the micro air pump; air circulation is driven by an atmosphere sampling instrument and a field sampling gas micro air pump, the fragrance of the fresh tea leaves is circulated into the fragrance adsorption column to be adsorbed, and field sampling of the fragrance of the fresh tea leaves is achieved; impurities are filtered out through the air filtering device, and the fragrance adsorption column is prevented from being blocked; closed internal circulation air is adopted for aroma adsorption, so that the quantity of impurities is reduced while the aroma adsorption effect is ensured, and the aroma is purer; the device is small in size and convenient to carry to a tea field for sampling, fresh tea leaves are prevented from being oxidized due to long-time transportation, and the accuracy of a detection result is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of tea aroma extraction, and in particular relates to a portable fresh tea leaf aroma sampling device. Background Art

[0002] Tea products are mainly processed from young buds and leaves of tea trees. Studies have confirmed that tea leaves are rich in a variety of characteristic secondary metabolites. The aroma of tea is one of the important indicators for evaluating the quality of tea, and it is also an important factor in attracting consumers and improving market competitiveness. Volatile compounds determine the aroma characteristics of tea. More than 700 aroma components have been identified in tea leaves, mainly including more than 10 categories such as alcohols, aldehydes, ketones, esters, phenols, nitrogen-containing compounds and oxygen-containing heterocyclic compounds. Tea aroma substances can be divided into terpenes and their derivatives, aliphatics and their derivatives, aromatic derivatives, nitrogen-containing, oxygen-containing heterocyclic compounds and other compounds according to their chemical structure.

[0003] The sweetness of tea mainly comes from the protein and amino acids in tea leaves; the bitterness of tea leaves mainly comes from tea polyphenols and alkaloids, while the aroma is mainly from various volatile esters. Spring tea grown at low temperatures has high protein and amino acid content, so it has a sweet and fresh taste. Summer tea grown at high temperatures in summer has high tea polyphenol content, so it has a strong bitter taste. The good taste mainly comes from protein and amino acids, and various aromas come from volatile esters. The aromatic substances in tea leaves are also called "volatile aroma components (VFC)", which is a general term for volatile substances in tea leaves. Tea aromatic substances are a mixture of various different components, and most molecules have one (or more) unsaturated double bonds, or contain certain active groups that play a role in the formation of aroma. At room temperature, most aromatic substances are oily liquids, colorless or slightly yellow, most of which have aroma and are very volatile.

[0004] The extraction of aroma from fresh tea leaves is beneficial to the detection of pesticide residues, aroma components and content in fresh tea leaves, so as to ensure the quality of tea and promote research on tea. In the extraction of aroma from fresh tea leaves, fresh leaves are easily oxidized after picking. To ensure the quality of aroma extraction, the aroma must be extracted in time after picking. The existing technology lacks an aroma extraction device that is easy to carry, which leads to untimely aroma extraction and affects the detection results.

[0005] With the application of various trace analysis instruments, the research on the extraction and component identification of tea aroma substances has made great progress. At present, headspace solid phase microextraction (HS-SPME) or GC-MS is widely used to comprehensively determine tea aroma substances. However, due to the low content, complex composition, volatility and instability of aroma substances in Pu'er tea, oxidation, polymerization, group transfer and other reactions are prone to occur during the extraction process. Therefore, the tea aroma extracts obtained by the commonly used HS-SPME or GC-MS methods still cannot well reflect the aroma characteristics of the tea samples. In addition, due to different thresholds, the compounds with high content obtained by instrument detection may not be the dominant factor of the aroma, while the compounds with low content are very likely to be the key to the formation of the aroma. Summary of the invention

[0006] In order to overcome the problem that there is a lack of portable aroma extraction devices in the background technology, which leads to untimely aroma extraction and affects the detection results, the present invention provides a portable fresh tea leaf aroma sampling device; by putting fresh tea leaves into an FEP gas collection bag, driving air circulation through an atmospheric sampler and a micro air pump, the tea aroma is brought into an aroma adsorption column for adsorption, thereby achieving sampling of the aroma of fresh tea leaves; the circulating air passes through an air filter device to filter out debris before entering the aroma adsorption column, thereby avoiding clogging of the aroma adsorption column and affecting the aroma adsorption effect; the closed internal circulating air is used for aroma adsorption, while ensuring the aroma adsorption effect, the amount of debris is reduced, making the aroma cleaner; the device has the advantages of small size and is easy to carry to a wild tea garden for aroma sampling, thereby avoiding oxidation and deterioration of fresh tea leaves due to long-term transportation, ensuring the accuracy of aroma detection results, and at the same time ensuring accurate grading of tea leaves and tea quality, which is beneficial to the research on aroma substances in fresh tea leaves and the excavation and utilization of aroma substance components.

[0007] To achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a portable fresh tea leaf aroma sampling device mainly includes a FEP gas collection bag 1, an atmospheric sampler 2, an air flow meter 3, an air filter 4, an aroma adsorption column 5, a micro air pump 6, an air guide hose 7, and a battery 8. The FEP gas collection bag 1, the atmospheric sampler 2, the air flow meter 3, the air filter 4, the aroma adsorption column 5, and the micro air pump 6 are connected in sequence through the air guide hose 7, and the micro air pump 6 is connected to the FEP gas collection bag 1 through the air guide hose 7 to form a loop; the battery 8 is electrically connected to the atmospheric sampler 2 and the micro air pump 6.

[0008] Furthermore, the FEP gas collection bag 1 includes a bag body 11 and a drainage joint 12. Two drainage joints 12 are installed on the bag body 11, which are respectively connected to the atmospheric sampler 2 and the micro air pump 6 through the drainage joint 12 and the gas guide hose 7; a valve is provided on the drainage joint 12.

[0009] Furthermore, the FEP gas collection bag 1 is provided with an open bag for convenient loading of fresh tea leaves, and the bag opening is clamped and sealed by a sealing clamp 9 .

[0010] Furthermore, the airflow meter 3 is a laboratory gas glass rotor flowmeter.

[0011] Furthermore, the air filter device 4 includes a filter chamber 41 , a filter screen 42 , an adsorption tube 43 , and activated carbon 44 . The filter screen 42 is installed in the filter chamber 41 , the adsorption tube 43 is docked on the filter chamber 41 , and the activated carbon 44 is filled in the adsorption tube 43 .

[0012] Furthermore, the portable fresh tea leaf aroma sampling device also includes a storage box 10, and the storage box 10 includes a box body 101 and a box cover 102, one side of the box cover 102 is hinged to the box body 101, and the box body 101 and the box cover 102 are buckled by a tower buckle 103.

[0013] Furthermore, the box body 101 is provided with embedded compartments that match the atmospheric sampler 2, the airflow meter 3, the air filter device 4, the aroma adsorption column 5, and the micro air pump 6 respectively. The atmospheric sampler 2, the airflow meter 3, the air filter device 4, the aroma adsorption column 5 and the micro air pump 6 are respectively embedded in the corresponding embedded compartments, and the box body 101 is provided with a storage compartment 104 for placing the fresh tea leaf bag sealed by the FEP gas collection bag 1.

[0014] Furthermore, a storage bag 105 for storing an empty FEP gas collection bag 1 is provided in the box cover 102 .

[0015] Beneficial effects of the present invention: The invention puts fresh tea leaves into an FEP gas collection bag, drives air circulation through an atmospheric sampler and a micro air pump, and brings the tea aroma into an aroma adsorption column for adsorption, thereby realizing sampling of the aroma of fresh tea leaves; the circulating air passes through an air filter device to filter out impurities before entering the aroma adsorption column, thereby preventing the aroma adsorption column from being blocked and affecting the aroma adsorption effect; the closed internal circulating air is used for aroma adsorption, thereby reducing the amount of impurities while ensuring the aroma adsorption effect, thereby making the aroma purer; the device has the advantages of being small in size and easy to carry to a wild tea garden for aroma sampling, thereby preventing the fresh tea leaves from being oxidized and deteriorated due to long-term transportation, ensuring the accuracy of the aroma detection result, and simultaneously ensuring the accurate classification of tea leaves and the quality of tea leaves, thereby being beneficial to the research on the aroma substances of fresh tea leaves and the excavation and utilization of the aroma substance components. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the main axle measurement of the present invention.

[0017] Figure 2 It is a rear axonometric stereoscopic schematic diagram of the present invention.

[0018] Figure 3 It is a three-dimensional schematic diagram of the present invention in a state of being loaded into a storage box.

[0019] Figure 4 It is a three-dimensional schematic diagram of the storage box of the present invention in an open state.

[0020] Figure 5 It is a three-dimensional schematic diagram of the storage box of the present invention in a closed state.

[0021] Figure 6 It is a schematic diagram of an air filtering device of the present invention. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and beneficial effects of the present invention more clear, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding by technicians.

[0023] The invention discloses a portable fresh tea leaf aroma sampling device, which mainly comprises an FEP gas collection bag 1, an atmospheric sampler 2 (single-gas path atmospheric sampler model: QC-1S), an airflow meter 3 (model: LZB-3WB), an air filter 4, an aroma adsorption column 5, a micro air pump 6 (model: F22N282.4-12V), an air guide hose 7, and a battery 8. The FEP gas collection bag 1, the atmospheric sampler 2, the airflow meter 3, the air filter 4, the aroma adsorption column 5, and the micro air pump 6 are connected in sequence through the air guide hose 7, and the micro air pump 6 is connected to the FEP gas collection bag 1 through the air guide hose 7 to form a loop; the battery 8 and The atmosphere sampler 2 and the micro air pump 6 are electrically connected; by putting fresh tea leaves into a FEP gas collection bag, the air circulation is driven by the atmosphere sampler and the micro air pump, and the tea aroma is brought into the aroma adsorption column for adsorption, thereby realizing the sampling of the aroma of fresh tea leaves; the circulating air passes through an air filter device to filter out impurities before entering the aroma adsorption column, thereby avoiding clogging of the aroma adsorption column and affecting the aroma adsorption effect; the closed internal circulating air is used for aroma adsorption, while ensuring the aroma adsorption effect, the amount of impurities is reduced, making the aroma purer; the device is small in size and easy to carry to the tea field for sampling, thereby avoiding oxidation of fresh tea leaves due to long-term transportation, ensuring the accuracy of the test results, ensuring accurate grading of tea leaves, ensuring the quality of tea leaves, and promoting tea research.

[0024] The FEP gas collection bag 1 includes a bag body 11 and a drainage joint 12. Two drainage joints 12 are installed on the bag body 11, which are respectively connected to the atmospheric sampler 2 and the micro air pump 6 through the drainage joint 12 and the gas guide hose 7; a valve is provided on the drainage joint 12, and the connection and sealing of the gas guide hose 7 can be facilitated through the drainage joint 12, which is simple and quick to operate.

[0025] The FEP gas collection bag 1 is provided with an open bag for convenient loading of fresh tea leaves, and the bag opening is clamped and sealed by a sealing clamp 9, which is convenient for loading and pouring out fresh tea leaves. The sealing is achieved by clamping with the sealing clamp 9, and the operation is simple and quick.

[0026] The airflow meter 3 is a laboratory gas glass rotor flowmeter.

[0027] The air filter device 4 comprises a filter chamber 41 , a filter screen 42 , an adsorption tube 43 , and activated carbon 44 . The filter screen 42 is installed in the filter chamber 41 , the adsorption tube 43 is docked on the filter chamber 41 , and the activated carbon 44 is filled in the adsorption tube 43 .

[0028] The portable fresh tea aroma sampling device further comprises a storage box 10 , which comprises a box body 101 and a box cover 102 , one side of the box cover 102 is hinged to the box body 101 , and the box body 101 and the box cover 102 are buckled via a tower buckle 103 .

[0029] The box body 101 is provided with embedded compartments that match the atmospheric sampler 2, the airflow meter 3, the air filter device 4, the aroma adsorption column 5, and the micro air pump 6 respectively. The atmospheric sampler 2, the airflow meter 3, the air filter device 4, the aroma adsorption column 5 and the micro air pump 6 are respectively embedded in the corresponding embedded compartments, which is convenient for carrying and avoids damage caused by collision between components; the box body 101 is provided with a storage compartment 104 for placing fresh tea leaf bags sealed by FEP gas collection bags 1. The tea bags after aroma sampling are collected and placed in the storage compartment 104 to avoid waste.

[0030] The box cover 102 is provided with a storage bag 105 for storing an empty FEP gas collection bag 1 for easy access.

[0031] Working process: The box body 101 is provided with embedded compartments that match the atmosphere sampler 2, the airflow meter 3, the air filter device 4, the aroma adsorption column 5, and the micro air pump 6. The atmosphere sampler 2, the airflow meter 3, the air filter device 4, the aroma adsorption column 5 and the micro air pump 6 are respectively embedded in the corresponding embedded compartments, which is convenient for carrying and avoids damage caused by collision between components. The device is small in size and easy to carry to the tea field for sampling; the fresh tea leaves are put into the FEP gas collection bag, the connection of the equipment is completed to form a loop, and the air circulation is driven by the atmosphere sampler and the micro air pump to bring the tea aroma into the aroma adsorption column for sampling. Adsorption can realize the sampling of the aroma of fresh tea leaves; the circulating air passes through the air filter device to filter out debris before entering the aroma adsorption column to avoid clogging of the aroma adsorption column and affecting the aroma adsorption effect; the closed internal circulating air is used for aroma adsorption to ensure the aroma adsorption effect while reducing the amount of debris, making the aroma purer; the advantage of this device is that it is small in size and easy to carry to the wild tea garden for aroma sampling, avoiding oxidation and deterioration of fresh tea leaves due to long-term transportation, ensuring the accuracy of aroma detection results, and at the same time ensuring the accurate grading of tea and the quality of tea, which is conducive to the research on aroma substances in fresh tea leaves and the excavation and utilization of aroma substance components.

[0032] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A portable fresh tea aroma sampling device, characterized in that: The portable fresh tea leaf aroma sampling device comprises an FEP gas collection bag (1), an atmospheric sampler (2), an air flow meter (3), an air filter (4), an aroma adsorption column (5), a micro air pump (6), an air guide hose (7), and a storage battery (8). The FEP gas collection bag (1), the atmospheric sampler (2), the air flow meter (3), the air filter (4), the aroma adsorption column (5), and the micro air pump (6) are connected in sequence via the air guide hose (7); the micro air pump (6) and the FEP gas collection bag (1) are connected via the air guide hose (7) to form a loop; and the storage battery (8) is electrically connected to the atmospheric sampler (2) and the micro air pump (6).

2. A portable fresh tea aroma sampling device as claimed in claim 1, characterized in that: The FEP gas collection bag (1) comprises a bag body (11) and a drainage joint (12); the bag body (11) is provided with two drainage joints (12), which are respectively connected to an atmospheric sampler (2) and a micro air pump (6) via the drainage joints (12) and an air guide hose (7); and a valve is provided on the drainage joint (12).

3. A portable fresh tea aroma sampling device as claimed in claim 1 or 2, characterized in that: The FEP gas collection bag (1) is provided with an open bag for convenient loading of fresh tea leaves, and the bag opening is clamped and sealed by a sealing clamp (9).

4. A portable fresh tea aroma sampling device as claimed in claim 3, characterized in that: The air flow meter (3) is a laboratory gas glass rotor flow meter.

5. A portable fresh tea aroma sampling device as claimed in any one of claims 1, 2 and 4, characterized in that: The air filter device (4) comprises a filter chamber (41), a filter screen (42), an adsorption tube (43), and activated carbon (44); the filter screen (42) is installed in the filter chamber (41), the adsorption tube (43) is docked on the filter chamber (41), and the activated carbon (44) is filled in the adsorption tube (43).

6. A portable fresh tea aroma sampling device as claimed in any one of claims 1, 2 and 4, characterized in that: The portable fresh tea leaf aroma sampling device further comprises a storage box (10), wherein the storage box (10) comprises a box body (101) and a box cover (102), wherein one side of the box cover (102) is hinged to the box body (101), and the box body (101) and the box cover (102) are buckled via a tower buckle (103).

7. A portable fresh tea aroma sampling device as claimed in claim 6, characterized in that: The box (101) is provided with embedded compartments respectively matching the atmospheric sampler (2), the air flow meter (3), the air filter device (4), the aroma adsorption column (5), and the micro air pump (6); the atmospheric sampler (2), the air flow meter (3), the air filter device (4), the aroma adsorption column (5), and the micro air pump (6) are respectively embedded in the corresponding embedded compartments; and the box (101) is provided with a storage compartment (104) for placing a fresh tea leaf bag sealed by an FEP gas collection bag (1).

8. A portable fresh tea aroma sampling device as claimed in claim 6, characterized in that: A storage bag (105) for storing an empty FEP gas collection bag (1) is provided inside the box cover (102).

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