CN112136911A - Green drying shed and method for improving green drying quality of green-dried green tea - Google Patents
Green drying shed and method for improving green drying quality of green-dried green tea Download PDFInfo
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- CN112136911A CN112136911A CN202011027002.1A CN202011027002A CN112136911A CN 112136911 A CN112136911 A CN 112136911A CN 202011027002 A CN202011027002 A CN 202011027002A CN 112136911 A CN112136911 A CN 112136911A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/06—Treating tea before extraction; Preparations produced thereby
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
Abstract
The invention belongs to the technical field of tea drying, and particularly relates to a green-drying shed and a method for improving the green-drying quality of green-drying green tea. The method comprises the following steps: erecting a green drying shed outside a green drying frame, and wrapping the green drying shed by using a polyethylene film; pumping out air in the green drying shed, and cooling and dehumidifying the pumped out air; and sending the cooled and dehumidified air back to the green sun-curing shed. The green drying shed comprises a shed frame, a heater, an exhaust fan, a heat exchanger and a green drying frame, wherein the green drying frame is arranged in the shed frame; polyethylene films are arranged on the top and the periphery of the shed frame; the inlet of the exhaust fan is communicated with an air outlet arranged at the top of the shed frame through an output pipe, and the output pipe is provided with a heater; the outlet of the exhaust fan is connected with a heat exchanger, and the heat exchanger is also connected with an input pipe communicated with an air inlet arranged at the lower part of the shed frame. The invention solves the problems of ultraviolet light transmission in natural light and low-temperature drying in the greenhouse, and can provide guarantee for large-scale production of high-quality sun-dried green tea.
Description
Technical Field
The invention belongs to the technical field of tea drying, and particularly relates to a green-drying shed and a method for improving the green-drying quality of green-drying green tea.
Background
The sun-drying is a key link for forming the excellent quality of oolong tea, Pu' er tea raw materials (sun-drying green tea) and white tea. The sun-drying technology of sun-dried green tea mainly depends on the irradiation of natural light, and the heat source of the sun-dried green tea is utilized to slowly dry the tea at a lower temperature, so that the water content of the finished tea is between 5 and 6 percent. At present, the sun-drying of sun-dried green tea is mainly carried out in an outdoor cement ground and a sun-drying shed built by a sunlight plate. Both of these approaches have a number of disadvantages: firstly, outdoor sun-drying is greatly influenced by external factors such as weather, pollutants and the like, and the quality of products cannot be ensured. Experiments show that ultraviolet light in natural light plays an important role in tea flavor quality formation during sunning, but the currently used green-sunning shed has the advantages that the shed material greatly blocks propagation of short-wave light such as ultraviolet light and the like, and a good ventilation system is not designed, so that air in the shed is not circulated, and the tea quality formation is finally influenced.
Disclosure of Invention
In view of the above, the present invention aims to provide a green-sun shed and a method for improving the green-sun quality of green-sun tea, and aims to solve the problems of ultraviolet light transmission in natural light and low-temperature drying in the shed.
In order to achieve the purpose, the invention provides the following technical scheme:
a sunning method for improving the sunning quality of sunning green tea comprises the following steps: erecting a green drying shed outside a green drying frame, and wrapping the green drying shed by using a polyethylene film; pumping out air in the green drying shed, and cooling and dehumidifying the pumped out air; and sending the cooled and dehumidified air back to the green sun-curing shed.
Preferably, the air is drawn at the top of the greenhouses by means of a suction fan.
Preferably, the air extracted is heated and dehumidified by a heater, and the heated and dehumidified air is cooled by a heat exchanger in a heat exchange manner.
Preferably, convection ducts are used for disturbing the cooled and dehumidified air in a convection manner above and below a sunning frame in the sunning shed.
Preferably, the method further comprises the steps of acquiring the temperature and humidity of the air sucked out by using a hygrothermograph, and controlling the temperature reduction and dehumidification of the air returned to the sunning green shed according to the acquired temperature and humidity of the air.
The invention also provides a green drying shed for improving the green drying quality of green-dried tea, which is used for realizing the green drying method and comprises a shed frame, a heater, an exhaust fan, a heat exchanger and a green drying frame, wherein the green drying frame is arranged in the shed frame and is used for placing tea; the shed frame is of a frame structure, and polyethylene films are arranged on the top and the periphery of the shed frame; the inlet of the exhaust fan is communicated with an air outlet arranged at the top of the shed frame through an output pipe, and the output pipe is provided with a heater; the outlet of the exhaust fan is connected with the heat exchanger, and the heat exchanger is also connected with an input pipe communicated with an air inlet arranged at the lower part of the shed frame.
Further, the greenhouse comprises a hygrothermograph which is arranged in the greenhouse frame and used for controlling the heater and the heat exchanger in an interlocking manner.
Further, the air exhaust device also comprises a ceiling arranged at the top of the shed frame, and the air exhaust port is formed between the ceiling and the top of the shed frame; the top surface of the ceiling and the connecting part between the ceiling and the top of the shed frame are both provided with the polyethylene film.
Furthermore, the input pipes are respectively arranged on two sides of the shed frame and are arranged in one-to-one correspondence in opposite directions.
Furthermore, the input pipes on one side are arranged at intervals along the width direction of the shed frame and are arranged at an upper layer and a lower layer relative to the sunning frame.
The invention has the beneficial effects that:
1. the green-sun shed and the method provided by the invention can provide guarantee for large-scale production of high-quality Pu' er tea raw materials and can provide products with high sanitary standards.
2. According to the green-sun shed provided by the invention, the ultraviolet transmittance of tea leaves in the green-sun process is increased by covering the ultraviolet-transparent film on the outer side of the shed frame, so that the flavor and quality of the tea leaves are improved.
3. The green drying shed and the method provided by the invention increase the air convection speed by arranging the air outlet on the side wall at the high position and the air inlet on the side wall at the low position, thereby ensuring that the tea can obtain a sufficient drying effect.
4. The sunning shed and the method provided by the invention can regulate and control the temperature and the humidity in the sunning shed through the combined control of the hygrothermograph, the heater and the heat exchanger, and ensure the uniform quality of the sunning tea.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of a green-sun shed according to an embodiment of the invention.
FIG. 2 is a schematic structural view of another embodiment of the greenery shed of the invention.
Fig. 3 is a sectional view a-a in fig. 2.
Reference numerals: the greenhouse comprises a greenhouse frame 1, a ceiling 2, a polyethylene film 3, an output pipe 4, a heater 5, an exhaust fan 6, a heat exchanger 7, an input pipe 8, a sunning frame 9, an air outlet 10, an air inlet 11 and a hygrothermograph 12.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example one
Referring to fig. 1, the green-sun shed for improving the green-sun quality of green-sun tea according to the embodiment includes a shed frame 1, a green-sun frame 9 disposed in the shed frame 1 and used for placing rolled leaves, a ceiling 2 and an air outlet 10 disposed at the top of the shed frame, an air inlet 11 disposed at the bottom of the shed frame and located below the green-sun frame, and a polyethylene film 3 disposed at the top of the shed frame, around the shed frame and on the top surface of the ceiling.
Specifically, the shed frame 1 is of a frame structure and is divided into an upper layer and a lower layer, the lower layer of bed frame is composed of a plurality of stand columns, the upper layer of ceiling is supported on the top of the shed frame through a plurality of support columns, and the length of the edge of the ceiling exceeds that of the support columns, for example, the length of the edge exceeds 50cm, so that rainwater in rainy days is prevented from entering the shed through an open air outlet and affecting the sun-drying quality of sun-dried green tea; similarly, the length of the edge of the top of the shed frame should exceed that of the edge of the upright post, and if the length of the edge of the top of the shed frame is more than 50cm, rainwater is prevented from entering the shed in rainy days, and the quality of the sun-dried green tea is prevented from being influenced; the relative width of the support columns is smaller than 1/2 of the relative width of the upright columns and is parallel to each other, so that the open type air outlet is opposite to the open type air inlet. The upper space of the shed frame is narrowed, the gas flow exchange is accelerated, the temperature balance in the shed is maintained, and the quality of the sun-dried green tea is uniform and consistent. The polyethylene film 3 with higher ultraviolet transmittance is covered on the shed frame and the ceiling, so that ultraviolet light can be transmitted to a greater degree to improve the sun-dried green quality of the sun-dried green tea; the air outlet and the air inlet can realize air convection in the shed frame and are used for ventilation and drying.
In the embodiment, the height of the green-sun shed frame from the ground is not less than 0.9 meter. And a hygrothermograph 12 is arranged in the shed frame every 6 meters, so that the temperature and the humidity in the green drying shed can be accurately regulated and controlled, and the uniform quality of the green drying tea is ensured.
Example two
Referring to fig. 2 and 3, the present embodiment is different from the present embodiment in that: the green drying shed is also provided with a heater 5, an exhaust fan 6 and a heat exchanger 7, wherein the heater 5, the exhaust fan 6 and the heat exchanger 7 are used for circularly cooling and dehumidifying the air in the shed frame, the inlet of the exhaust fan 6 is communicated with an air outlet 10 arranged at the top of the shed frame 1 through an output pipe 4, and the output pipe 4 is provided with the heater 5 which can heat and dehumidify the over-humid air; the outlet of the exhaust fan 6 is connected with a heat exchanger 7 for cooling the air with over-high temperature, and the heat exchanger 7 is also connected with an input pipe 9 communicated with an air inlet 11 arranged at the lower part of the shed frame 1. By adopting the scheme, high-temperature damp and hot air in the shed frame can be pumped out by utilizing the exhaust fan, and the air returned into the shed frame is low-temperature dry air by dehumidifying through the heater and cooling through the heat exchanger, so that the drying of tea leaves is facilitated.
The heater, the heat exchanger, the exhaust fan and the like in the embodiment are all conventional equipment, are easy to obtain and are low in cost. If the heater can adopt an electric heating device, the heat exchanger can adopt an air-water exchange device.
The sunning shed in the embodiment also comprises a hygrothermograph which is arranged in the shed frame 1 and used for interlocking control of the heater and the heat exchanger. Like this, through the joint control of warm and humid acidimeter, heater and heat exchanger, utilize the warm and humid acidimeter promptly to acquire the humiture of the interior air of suction in the rack to according to the air humiture who acquires it to send back the cooling dehumidification of the air in the sunning canopy and control, can regulate and control the humiture in the sunning canopy, guarantee to shine blue or green tea matter homogeneous.
The input pipes 9 in this embodiment are respectively arranged at two sides of the canopy frame 1 and are arranged in one-to-one correspondence in opposite directions, and the input pipes 9 at one side are arranged at intervals along the width direction of the canopy frame 1 and are arranged at an upper layer and a lower layer relative to the sunning frame. Therefore, convection disturbance is formed on the upper part and the lower part of the sunning frame in the sunning shed for the air subjected to cooling and dehumidification by utilizing the convection action of the input pipe, the convection speed of the air is increased, and therefore the tea can be guaranteed to obtain a sufficient drying effect.
The following explains a sun-drying method of the sun-drying green shed, which specifically comprises the following steps: erecting a green drying shed outside the green drying frame, and wrapping the green drying shed by using a polyethylene film; air in the green drying shed is sucked by an exhaust fan, and the sucked high-temperature damp and hot air is cooled and dehumidified by a heater and a heat exchanger respectively; the low-temperature dry air after being cooled and dehumidified is sent back to the sunning shed, and is conveyed back in a convection type disturbance mode through an input pipe above and below the sunning frame. The processed low-temperature dry air is recycled in the shed frame, so that the green-sun-drying quality of the tea can be ensured.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. A sunning method for improving the sunning quality of sunning green tea is characterized by comprising the following steps:
erecting a green drying shed outside a green drying frame, and wrapping the green drying shed by using a polyethylene film;
pumping out air in the green drying shed, and cooling and dehumidifying the pumped out air;
and sending the cooled and dehumidified air back to the green sun-curing shed.
2. The method of claim 1, wherein the air is drawn from the top of the greenery shed by an air blower.
3. The method of claim 1, wherein the air is heated and dehumidified by a heater, and the heated and dehumidified air is cooled by a heat exchanger.
4. The method of claim 1, wherein convection ducts are used to disturb the air after cooling and dehumidification in a convection manner above and below a drying rack in the drying shed.
5. The sunning method for improving the sunning quality of the sunning green tea as claimed in any one of claims 1 to 4, further comprising the steps of acquiring the temperature and humidity of the sucked air by using a hygrothermograph, and controlling the temperature reduction and the dehumidification of the air returned to the sunning shed according to the acquired temperature and humidity of the air.
6. A green-sun shed for improving the green-sun quality of green-sun tea, which is used for realizing the green-sun method according to any one of claims 1 to 5, and comprises a shed frame (1), a heater (5), an exhaust fan (6), a heat exchanger (7) and a green-sun frame (9), wherein the green-sun frame is arranged in the shed frame and is used for placing tea leaves; the shed frame is of a frame structure, and polyethylene films (3) are arranged on the top and the periphery of the shed frame; the inlet of the exhaust fan is communicated with an air outlet (10) arranged at the top of the shed frame through an output pipe (4), and the output pipe is provided with a heater; the outlet of the exhaust fan is connected with a heat exchanger, and the heat exchanger is also connected with an input pipe (8) communicated with an air inlet (11) arranged at the lower part of the shed frame.
7. A greenhouses for improving the sunning quality of a sunning green tea according to claim 6, further comprising a hygrothermograph (12) arranged in the canopy frame and used for interlocking control of the heater and the heat exchanger.
8. A sunning shed for improving the sunning quality of the sunning green tea as claimed in claim 6, further comprising a ceiling (2) arranged at the top of the shed frame, wherein the air outlet is formed between the ceiling and the top of the shed frame; the top surface of the ceiling and the connecting part between the ceiling and the top of the shed frame are both provided with the polyethylene film.
9. The green-sun shed for improving the green-sun quality of green-sun tea as claimed in claim 6, wherein the input pipes are respectively arranged on two sides of the shed frame and are arranged in one-to-one correspondence with each other.
10. The greenhouses for improving the sunning quality of the sunning green tea as claimed in claim 9, wherein the input pipes on one side are arranged at intervals along the width direction of the greenhouses and are arranged in upper and lower layers relative to the greenhouses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011027002.1A CN112136911A (en) | 2020-09-25 | 2020-09-25 | Green drying shed and method for improving green drying quality of green-dried green tea |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011027002.1A CN112136911A (en) | 2020-09-25 | 2020-09-25 | Green drying shed and method for improving green drying quality of green-dried green tea |
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| CN112136911A true CN112136911A (en) | 2020-12-29 |
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| CN202011027002.1A Pending CN112136911A (en) | 2020-09-25 | 2020-09-25 | Green drying shed and method for improving green drying quality of green-dried green tea |
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