White tea withering and drying device and method

Abstract

The invention provides a white tea withering and drying device and method, and relates to the field of food engineering. Comprising a drying box body, a refraction bracket, an arc-shaped spoiler and a light source, the drying box body comprises a hot air forming cavity and a drying cavity which are arranged in parallel in the horizontal direction, and a heating mechanism is arranged in the hot air forming cavity; the side, close to the hot air forming cavity, of the drying cavity is provided with an air inlet, and the side, away from the hot air forming cavity, of the drying cavity is provided with an air outlet. A rotary base is arranged at the bottom of the drying cavity; the multiple arc-shaped spoilers are arranged in the drying cavity and located on the outer side of the air inlet and the outer side of the air outlet correspondingly. The multiple arc-shaped spoilers are matched with the air inlet and the air outlet correspondingly to form a capsule type hot air flow field in the drying cavity. The refraction bracket is mounted on the rotary base and is used for containing white tea; at least two light sources are arranged, and the two light sources are arranged on the two sides of the refraction bracket respectively. The production efficiency can be improved and the dependence on the environment can be reduced while the quality of the tea leaves is ensured.

Description

Technical Field

[0001] The invention relates to the field of food engineering, and in particular to a white tea withering and drying device and method. Background Art

[0002] White tea is one of the six basic types of traditional Chinese tea and is a slightly fermented tea. Due to its unique production process, the quality of white tea is closely related to its production process, especially in the withering process, which determines the taste, color and aroma of white tea. The production process of white tea mainly includes two steps: withering and drying. Among them, the withering process, as the primary link in the production of white tea, determines the appearance, taste and color of the tea soup. The withering process can gradually evaporate the moisture of the tea leaves through a slow natural oxidation process, thereby achieving the effect of forming the unique flavor of white tea.

[0003] At present, the traditional white tea withering process usually adopts an indoor natural withering method, which uses natural wind and low humidity to promote the withering of tea leaves in a well-ventilated environment. Although this process can produce high-quality white tea, its shortcomings are also very obvious. First, the withering process is highly dependent on the environment and is easily affected by external factors such as climate, temperature and humidity, resulting in production instability. Secondly, the traditional withering process takes up a lot of space and takes a long time, which leads to low production efficiency, especially when the tea output is large or refined production is required, it is difficult to meet market demand.

[0004] Especially in some tea-growing areas with complex terrain and wide distribution of tea, tea production is highly dispersed. In this area, due to the particularity of terrain and climate, the temperature difference between day and night is large and the humidity changes significantly. The traditional natural withering method is difficult to effectively control the withering process, which affects the processing effect of white tea. And because the scale of tea enterprises in this area is generally small, the construction of a special white tea processing plant requires huge investment, resulting in excessively high costs for white tea production, which restricts the development of the local tea industry. Summary of the invention

[0005] The purpose of the present invention is to provide a white tea withering and drying device and method, which integrates withering and drying functions, has a high degree of automation, and can realize the production of high-quality, safe and hygienic white tea in an integrated manner in a factory; and can improve production efficiency and reduce dependence on the environment while ensuring the quality of tea.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A white tea withering and drying device, comprising a drying box, a refracting bracket, an arc-shaped spoiler and a light source; The drying box body comprises a hot air forming chamber and a drying chamber arranged in parallel in a horizontal direction, wherein a heating mechanism is arranged in the hot air forming chamber; an air inlet is arranged on a side of the drying chamber close to the hot air forming chamber, and an air outlet is arranged on a side of the drying chamber away from the hot air forming chamber; a rotating base is arranged at the bottom of the drying chamber; A plurality of arc-shaped spoilers are provided, and the plurality of arc-shaped spoilers are provided in the drying chamber and are respectively located outside the air inlet and the air outlet; the plurality of arc-shaped spoilers cooperate with the air inlet and the air outlet to form a capsule-shaped hot air flow field in the drying chamber; The refraction bracket is installed on the rotating base, and the refraction bracket is used to hold white tea; At least two light sources are provided, and the two light sources are respectively provided on two sides of the refracting bracket.

[0007] Furthermore, in the present invention, the refraction bracket is composed of a plurality of refraction trays stacked in sequence from bottom to top, there is a spacing between the plurality of refraction trays, and a plurality of ventilation holes are provided at the bottom of the refraction trays.

[0008] Furthermore, in the present invention, the refractive tray is made of acrylic material.

[0009] Furthermore, in the present invention, the light source is an LED lamp tube, and four LED lamp tubes are provided, and the four LED lamp tubes are respectively arranged at the four corners of the drying chamber; wherein the wavelength of the light emitted by the LED lamp tube is 570nm-600nm, and the light intensity is 800±200 lux.

[0010] Furthermore, in the present invention, an LED backlight reflective film is provided on the inner wall of the drying chamber.

[0011] Furthermore, in the present invention, the air inlet and the air outlet are respectively provided with air ducts which are inclined relative to the four arc-shaped spoilers.

[0012] Furthermore, in the present invention, the heating mechanism includes a compressor, a condensing heat exchanger and a fan, the fan is arranged on the side of the hot air forming chamber opposite to the air inlet; the condensing heat exchanger is arranged on the side of the hot air forming chamber close to the air inlet; the compressor is arranged at the bottom of the heat exchange device and connected to the condensing heat exchanger.

[0013] Furthermore, in the present invention, a temperature and humidity sensor is provided in the drying chamber, and the temperature and humidity sensor is used to detect the air humidity inside the drying chamber; a humidifier is provided on the top of the drying chamber, and the humidifier is used to maintain the air humidity inside the drying chamber at 55%-65%.

[0014] Furthermore, in the present invention, four arc-shaped spoilers are provided, and the four arc-shaped spoilers are respectively provided on the upper and lower sides of the air inlet and the air outlet; and observation holes are respectively provided on the top of the hot air forming chamber and the drying chamber.

[0015] A withering and drying method based on the above-mentioned white tea withering and drying device comprises the following steps: Start the heating mechanism and adjust the temperature in the drying chamber to 22°C-27°C and the humidity to 55%-65%; Determine the optimal shape and installation position of the arc spoiler according to the fluent flow field simulation, install and adjust the angles of multiple arc spoilers to maintain a stable hot air flow field in the drying chamber; Placing the white tea raw material on the refractive bracket and turning on the light source and the rotating base for withering; After withering for a first designated time, the light source is turned off, and the temperature in the drying chamber is adjusted to 55° C.-65° C. for a second designated time, so that the moisture content of the white tea is less than 6%.

[0016] The present invention has at least the following advantages or beneficial effects: The present invention sets a heating mechanism in the hot air forming chamber, and the hot air formed by the heating mechanism enters from the air inlet of the drying chamber, dries the white tea raw materials in the drying chamber, and is discharged from the air outlet; sets a rotating base at the bottom of the drying chamber, and sets a refractive bracket on the rotating base for holding white tea, and the rotating base rotates at a uniform speed during withering, and cooperates with the light sources arranged on both sides of the refractive bracket, so that each area of ​​the refractive bracket is evenly illuminated; sets a plurality of arc-shaped spoilers on the outside of the air inlet and the air outlet, and adjusts the angle to cooperate with the air inlet and the air outlet, so as to form a capsule-shaped hot air flow field in the drying chamber, so that the air flow disturbance is small, and with the stable hot air speed, the withering process is more uniform, and the quality control is improved. The present invention integrates the withering and drying functions, has a high degree of automation, is simple to operate, and can realize the production of high-quality, safe and hygienic white tea in an integrated manner in the factory; and can improve production efficiency and reduce dependence on the environment while ensuring the quality of tea. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the internal structure of a white tea withering and drying device provided in an application example; Figure 2 A partial structural top view of a white tea withering and drying device provided in an embodiment of the application; Figure 3 A schematic diagram of the structure of a refractive bracket provided in an embodiment of the application; Figure 4 A schematic diagram of the wind direction of the hot air flow field provided for the application embodiment; Figure 5 This is a schematic diagram of the changes in the morphology, moisture, amino acids and tea polyphenols of white tea during the withering process of the application example.

[0019] Figure numerals: 1-drying box, 11-hot air forming chamber, 12-drying chamber, 13-air inlet, 14-air outlet, 15-rotating base, 2-refracting bracket, 21-refracting tray, 3-arc spoiler, 4-light source, 51-compressor, 52-condensing heat exchanger, 53-fan, 6-humidifier, 7-observation hole. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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. Example

[0022] Please refer to Figure 1-Figure 5 , which is a schematic diagram of the structure of a white tea withering and drying device in an embodiment of the present invention; This embodiment provides a white tea withering and drying device, comprising a drying box 1, a refracting bracket 2, an arc-shaped spoiler 3 and a light source 4. The drying box 1 comprises a hot air forming chamber 11 and a drying chamber 12 which are arranged in parallel in the horizontal direction. A heating mechanism is arranged in the hot air forming chamber 11. An air inlet 13 is arranged on a side of the drying chamber 12 close to the hot air forming chamber 11, and an air outlet 14 is arranged on a side of the drying chamber 12 away from the hot air forming chamber 11. A rotating base 15 is arranged at the bottom of the drying chamber 12. A plurality of arc-shaped spoilers 3 are provided, and the plurality of arc-shaped spoilers 3 are provided in the drying chamber 12 and are respectively located outside the air inlet 13 and the air outlet 14; the plurality of arc-shaped spoilers 3 cooperate with the air inlet 13 and the air outlet 14 to form a capsule-shaped hot air flow field in the drying chamber 12; The refraction bracket 2 is installed on the rotating base 15, and the refraction bracket 2 is used to hold white tea; At least two light sources 4 are provided, and the two light sources 4 are respectively provided on two sides of the refracting bracket 2 .

[0023] Next, a white tea withering and drying device according to this exemplary embodiment will be further described.

[0024] In some embodiments of the present application, reference Figure 1 The drying box 1 comprises a hot air forming chamber 11 and a drying chamber 12 which are arranged in parallel in the horizontal direction, that is, the hot air forming chamber 11 and the drying chamber 12 are arranged in parallel on the left and right sides, and a heating mechanism is arranged in the hot air forming chamber 11, and the heating mechanism is used to generate hot air, and the generated hot air enters the drying chamber 12 on one side horizontally. An air inlet 13 is provided on the side of the drying chamber 12 close to the hot air forming chamber 11, and an air outlet 14 is provided on the side of the drying chamber 12 away from the hot air forming chamber 11. The hot air enters from the air inlet 13, circulates in the drying chamber 12 to dry the white tea, and is discharged from the air outlet 14, so that the hot air inside the drying chamber 12 circulates and maintains a stable temperature range.

[0025] As a preferred embodiment, the heating mechanism includes a compressor 51, a condensing heat exchanger 52 and a fan 53. The fan 53 is arranged on the side of the hot air forming chamber 11 opposite to the air inlet 13; the condensing heat exchanger 52 is arranged on the side of the hot air forming chamber 11 close to the air inlet 13; the compressor 51 is arranged at the bottom of the heat exchange device and connected to the condensing heat exchanger 52. The gaseous refrigerant is compressed by the compressor 51, and the temperature and pressure increase significantly, becoming a high-temperature and high-pressure gas. The high-temperature and high-pressure refrigerant enters the condensing heat exchanger 52, releases heat to the air in the drying box, and the refrigerant changes from gas to liquid; the fan 53 pushes the wind direction of the hot air to the air inlet 13, so that the hot air enters the drying chamber 12. The embodiment of the present application utilizes the existing heat pump heating technology, which is generally used for ambient temperatures below 25°C. At the same time, an electric heating device can be equipped to prevent insufficient heat.

[0026] In some embodiments of the present application, four arc-shaped spoilers 3 are preferably provided, and the four arc-shaped spoilers 3 are respectively provided on the upper and lower sides of the air inlet 13 and the air outlet 14; the four arc-shaped spoilers 3 cooperate with the air inlet 13 and the air outlet 14 to form a capsule-shaped hot air flow field in the drying chamber 12. The optimal shape and installation position of the arc-shaped spoiler 3 are determined according to the fluent flow field simulation. After installation, a capsule-shaped internal flow field is formed in the drying chamber 12, so that the air flow disturbance is small, and the capsule-shaped stable flow field formed in combination with the stable hot air velocity can make the water loss rate more uniform during the withering process.

[0027] As a preferred implementation method, refer to Figure 4 The air inlet 13 and the air outlet 14 are respectively provided with air ducts inclined relative to the four arc-shaped spoilers 3. The inclined air ducts cooperate with the arc-shaped spoilers 3, so that the hot air entering and exiting forms a capsule-shaped internal flow field under the limiting effect of the arc-shaped spoilers 3.

[0028] In some embodiments of the present application, a rotating base 15 is provided at the bottom of the drying chamber 12. The rotating base 15 can be driven by a stepping motor and a gear to rotate. During the withering process, the rotating base 15 rotates at a low speed, and the rotation speed is preferably 20 r / min. The refractive bracket 2 is mounted on the rotating base 15. The refractive bracket 2 is used to hold white tea. The refractive bracket 2 is driven to rotate by the rotating base 15. The refractive bracket 2 can transmit light so that the white tea can be treated with light, thereby improving the withering quality. At least two light sources 4 are provided. The two light sources 4 are respectively provided on both sides of the refractive bracket 2. When withering, the light source 4 is turned on. The refractive bracket 2 rotates at a low speed as the rotating base 15 rotates, so that the light path inside the drying chamber can be more uniform.

[0029] As a preferred implementation method, refer to Figure 3 The above-mentioned refraction bracket 2 is composed of a plurality of refraction trays 21 stacked in sequence from bottom to top, with a spacing between the plurality of refraction trays 21, and a plurality of ventilation holes are provided at the bottom of the refraction trays 21. Specifically, connecting rods can be provided on both sides of the plurality of refraction trays 21, and the plurality of refraction trays 21 are coupled and stacked in sequence through the connecting rods, which is convenient for installation and removal. The above-mentioned refraction bracket 2 can be provided in plurality, which can improve the withering efficiency. Ventilation holes are provided at the bottom of the refraction tray 21 for ventilation of the tea leaves, so that the surface tea leaves and the internal tea leaves wither more evenly.

[0030] As a preferred embodiment, the above-mentioned refractive tray 21 is made of acrylic material, which is lightweight and light-transmissive, and provides better carrier conditions for withering.

[0031] As a preferred implementation method, refer to Figure 2The light source 4 is an LED tube, and four LED tubes are provided, and the four LED tubes are respectively provided at the four corners of the drying chamber 12; wherein, the wavelength of the light emitted by the LED tube is 570nm-600nm, and the light intensity is 800±200 lux. Specifically, four LED tubes with a length of 1.5m are used, and their wavelength range is controlled to be around 580 nm, and their light intensity is adjusted so that the light intensity on the refraction tray 21 is within the range of 800±200 lux. Experiments have shown that the use of yellow light with a wavelength of 580 nm makes the quality of the prepared white tea the best.

[0032] As a preferred embodiment, the inner wall of the drying chamber 12 is provided with an LED backlight reflective film, and the LED backlight reflective film made of PET material is used to cover the inside of the drying chamber 12, which cooperates with the light source 4 to provide better lighting conditions for withering white tea.

[0033] As a preferred embodiment, a temperature and humidity sensor is provided in the drying chamber 12, which is used to detect the air humidity inside the drying chamber 12 and adjust the internal temperature and humidity according to the withering situation. A humidifier 6 is provided on the top of the drying chamber 12, which is used to maintain the air humidity inside the drying chamber 12 at 55%-65%. When the air humidity is low, the humidifier 6 can assist in increasing the humidity in the withering chamber to ensure the normal withering; in this embodiment, the humidity in the withering chamber is maintained at about 60%.

[0034] As a preferred embodiment, observation holes 7 are respectively provided on the top of the hot air forming chamber 11 and the drying chamber 12, and external temperature and humidity sensors can be connected to monitor the heat exchange conditions and changes in the withering environment in real time, control the disturbance of the withering process and monitor the occurrence of unexpected conditions, mainly monitoring the ambient temperature and humidity in the drying chamber 12.

[0035] The embodiment of the present application also provides a withering and drying method based on the above-mentioned white tea withering and drying device, comprising the following steps: S110, start the heating mechanism, adjust the temperature in the drying chamber 12 to 22°C-27°C, and the humidity to 55%-65%; specifically, before use, start the compressor 51 and the fan 53, adjust the temperature to 25°C, and measure the air humidity at the same time. If the air humidity is too low, turn on the humidifier 6 to make the humidity in the drying chamber 60%.

[0036] S120. Determine the optimal shape and installation position of the arc spoiler 3 based on the fluent flow field simulation, install and adjust the angles of four arc spoilers 3 to maintain a stable hot air flow field in the drying chamber 12. Specifically, after determining the specific curvature and the optimal installation position of the arc spoiler 3 based on the fluent flow field simulation, install the arc spoiler 3 in the drying chamber 12 and adjust the spoiler angle. During this process, the wind speed in each refractive tray 21 can be measured by an anemometer to keep it consistent, about 5.1 m / s, and feed after working stably for a certain period of time.

[0037] S130, placing the white tea raw material on the refractive tray 2 and turning on the light source 4 and the rotating base 15 for withering; specifically, placing the fresh tea leaves evenly in the refractive tray 21, turning on the rotating base 15, turning on the LED light source 4, and closing the withering chamber door, drying and withering can be performed simultaneously.

[0038] S140, after withering for the first specified time, turn off the light source 4, and adjust the temperature in the drying chamber 12 to 55℃-65℃ for the second specified time, so that the moisture content of the white tea is less than 6%. Specifically, the withering is carried out for 24 h-72 h according to the withering conditions. During this period, check whether the temperature and humidity in the drying chamber 12 are qualified. After the withering is completed, turn off the LED light source 4, adjust the heat pump temperature to 60℃, and bake until it is fully dry (moisture content is less than 6%), generally in about 3 hours. When the drying is completed, open the drying chamber 12, remove the refractive tray 21, and the finished white tea can be collected.

[0039] The specific process of the drying device and the drying method of the present application is further described below with more specific embodiments. Example 1

[0040] In mid-March, 14 kg of fresh tea leaves were purchased, and the damaged leaves were selected and removed, and the sand and other materials were removed. The compressor 51 and the fan 53 were turned on, and the temperature was adjusted to 25°C. Then the angle of the arc spoiler 3 was installed and adjusted, and the wind speed in each refraction tray 21 was measured by the anemometer to be consistent and maintained at about 5.1 m / s. The material was fed after working stably for 10 minutes. The fresh tea leaves were evenly placed in the refraction tray 21, the rotating base 15 and the LED light source 4 were turned on, and the door of the drying chamber was closed. Withering for 36 hours. During this process, the wind speed and light intensity were measured every 3 hours during withering, and samples were taken at 0, 6, 12, 18, 24, and 36 hours respectively. At the same time, they were compared with the withering process of ordinary white tea, and samples were kept for testing. After withering for 36 hours, the temperature was adjusted to 60°C, and the white tea was dried to be fully dry after 3 hours to obtain the finished white tea.

[0041] The white tea leaves prepared in this embodiment are gray-green in color, with obvious white hairs and good quality. The morphology before and after withering, the morphological changes during withering and the changes in some nutritional components are shown in the following table. Figure 5 As shown, free amino acids, tea polyphenols, chlorophyll and other nutrients are relatively completely retained during the withering process, which is close to the withering result of ordinary white tea. Example 2

[0042] In mid-November, 14 kg of fresh tea leaves were purchased. The rest was the same as in Example 1, that is, damaged leaves were selected and removed, and the sand and other substances therein were removed. The compressor 51 and the fan 53 were turned on, and the temperature was adjusted to 25°C. The angle of the arc spoiler 3 was then installed and adjusted, and the wind speed in each refraction tray 21 was measured by an anemometer to be consistent and maintained at about 5.1 m / s. The material was fed after stable operation for 10 min. The fresh tea leaves were evenly placed in the refraction tray 21, the rotating base 15 and the LED light source 4 were turned on, and the drying chamber door was closed. Withering for 36 h. During this process, the wind speed and light intensity were measured every 3 h during withering, and samples were taken at 0, 6, 12, 18, 24, and 36 h, respectively. At the same time, the samples were compared with the withering process of ordinary white tea, and samples were retained for testing. After withering for 36 h, the temperature was adjusted to 60°C, and the white tea was dried to be fully dry after 3 h to obtain the finished white tea. The prepared white tea was close to the commercially available Shoumei white tea.

[0043] In summary, the present invention can better reproduce the whole process of white tea withering, the product quality is stable, and it can better replace the natural withering process which is greatly affected by the environment: 1. The fluid is uniform during the withering process. The installation position of the spoiler is optimized according to the FLUENT flow field simulation to obtain the best shape and installation position. The overall flow field is capsule-shaped, and the wind speed is about 5.1 m / s. At the same time, the withering base rotates during withering, making the withering process more uniform and the quality control better.

[0044] 2. Using a porous acrylic refractive tray 21 and a special LED light source 4, the light intensity on each plate is controlled within 800±200 lux during the withering process, and with the rotating base 15, each area is evenly illuminated.

[0045] 3. The overall automation degree of the device of the present application is high, the investment is small, the floor space is small, and the operation is simple. Fresh tea leaves (green tea) are placed in the refracting tray 21, the LED light source 4 and the rotating base 15 are turned on, and the fan 53 is turned on to set the temperature at 25°C. After 72 hours, the temperature is adjusted to 60°C. After 3 hours, the finished white tea with a moisture content of about 4% can be obtained.

[0046] 4. The withered product obtained in the examples of this application is close to the general withering process, and the finished product has similar properties to commercially available white tea, and can better replace the natural withering process.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A white tea withering and drying device, characterized in that: It includes a drying box, a refracting bracket, an arc-shaped spoiler and a light source; The drying box body comprises a hot air forming chamber and a drying chamber arranged in parallel in a horizontal direction, wherein a heating mechanism is arranged in the hot air forming chamber; an air inlet is arranged on a side of the drying chamber close to the hot air forming chamber, and an air outlet is arranged on a side of the drying chamber away from the hot air forming chamber; a rotating base is arranged at the bottom of the drying chamber; A plurality of arc-shaped spoilers are provided, and the plurality of arc-shaped spoilers are provided in the drying chamber and are respectively located outside the air inlet and the air outlet; the plurality of arc-shaped spoilers cooperate with the air inlet and the air outlet to form a capsule-shaped hot air flow field in the drying chamber; The refraction bracket is installed on the rotating base, and the refraction bracket is used for containing white tea; At least two light sources are provided, and the two light sources are respectively provided on two sides of the refracting bracket.

2. The white tea withering and drying device according to claim 1, characterized in that: The deflection bracket is composed of a plurality of deflection trays stacked in sequence from bottom to top, with a spacing between the plurality of deflection trays, and a plurality of ventilation holes are provided at the bottom of the deflection trays.

3. The white tea withering and drying device according to claim 2, characterized in that: The refractive tray is made of acrylic material.

4. The white tea withering and drying device according to claim 1, characterized in that: The light source is an LED lamp tube, and four LED lamp tubes are arranged at the four corners of the drying chamber respectively; wherein the wavelength of the light emitted by the LED lamp tube is 570nm-600nm, and the light intensity is 800±200 lux.

5. The white tea withering and drying device according to claim 4, characterized in that: The inner wall of the drying chamber is provided with an LED backlight reflective film.

6. The white tea withering and drying device according to claim 1, characterized in that: Four arc-shaped spoilers are provided, and the four arc-shaped spoilers are respectively provided on the upper and lower sides of the air inlet and the air outlet; the air inlet and the air outlet are respectively provided with air ducts inclined relative to the four arc-shaped spoilers.

7. The white tea withering and drying device according to claim 1, characterized in that: The heating mechanism includes a compressor, a condensing heat exchanger and a fan, wherein the fan is arranged on the side of the hot air forming chamber opposite to the air inlet; the condensing heat exchanger is arranged on the side of the hot air forming chamber close to the air inlet; the compressor is arranged at the bottom of the heat exchange device and connected to the condensing heat exchanger.

8. The white tea withering and drying device according to claim 1, characterized in that: A temperature and humidity sensor is provided in the drying chamber, and the temperature and humidity sensor is used to detect the air humidity in the drying chamber; a humidifier is provided on the top of the drying chamber, and the humidifier is used to maintain the air humidity in the drying chamber at 55%-65%.

9. The white tea withering and drying device according to claim 1, characterized in that: Observation holes are respectively provided on the tops of the hot air forming chamber and the drying chamber.

10. A withering and drying method based on the white tea withering and drying device according to any one of claims 1 to 9, characterized in that: The steps include: Start the heating mechanism and adjust the temperature in the drying chamber to 22°C-27°C and the humidity to 55%-65%; Determine the optimal shape and installation position of the arc spoiler according to the fluent flow field simulation, install and adjust the angles of multiple arc spoilers to maintain a stable hot air flow field in the drying chamber; Placing the white tea raw material on the refractive bracket and turning on the light source and the rotating base for withering; After withering for a first designated time, the light source is turned off, and the temperature in the drying chamber is adjusted to 55° C.-65° C. for a second designated time, so that the moisture content of the white tea is less than 6%.

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