This technology provides a new mechanized automation solution for the serious night frost damages faced by the tea industry in Jiangsu Province. It develops anti-frost equipment suitable for air flow disturbances at the inversion of hilly regions, and develops a control strategy based on the critical low-temperature inverse temperature difference. The intelligent control technology enables large-scale, energy-efficient and energy-saving disaster reduction and disaster reduction. This technology is generally leading domestically. Products fill gaps in the domestic market. Its control technology is internationally leading. It can realize automation and mechanized operation. The use cost is low, labor productivity can be improved, labor intensity can be reduced, and clean energy can be used without any environmental pollution.
Project demonstration and promotion
In 2012, Jiangsu University upgraded the tea industry in Danyang City as one of the main directions of science and technology. It used the new research results of the school in recent years—tea plant anti-frost equipment and control technology, to apply it to resist the cold and freezing damage of tea gardens. With the joint efforts of both parties, Danyang Yunyang Maichun Tea Plant was selected as a demonstration application base to carry out key construction. At present, a 15 mu localized anti-frost machine demonstration base has been built. It is equipped with a 50 kW three-phase AC power supply, and 10 sets of anti-frost machines and its automatic control system have been installed. The use effect is good. A tea tree facility was established to cultivate a greenhouse, covering an area of ​​about 300 square meters, using the independent research and development of the University of Jiangsu vinegar bad substrate, in 3 different tea varieties on the formula organic cultivation. The tea farmers in Danyang City were trained in the anti-frost technology of tea gardens and tea plant cultivation techniques. A large number of technical video discs and brochures were distributed. In addition, wireless weather stations and video surveillance systems were installed at the demonstration site of the anti-frost machine.
Technical parameters of products Anti-frost machine is mainly composed of fan, main motor, rotating head, column, connecting parts, controller and temperature sensor. Its main technical parameters are as follows: main motor power 3 kilowatts, 3 phase alternating current 380 volts, fan installation The height is 4~8 meters, the depression angle is 15~50 degrees, the power of Yuntai Motor is 60 watts, the two-phase alternating current is 220 volts, the swing range is 60, 90, 120 degrees, and the swing frequency is 0.5~1 Hz. The service life is about 15 years.
The controller consists of a single-chip microcomputer, a circuit breaker, a phase sequence protector, a time relay, an AC contactor, a fuse and a temperature sensor, etc. The temperature detection accuracy is 0.5 DEG C and the control operation is about 20% energy-saving.
Analysis of market prospects and benefits The anti-frosting machine can effectively reduce the huge losses caused by the production of tea in late spring, stabilize the supply of tea, and advance the time to market. With 5% of the tea plantation area in the province of Jiangsu, and a severe case of a three-year cold spell, the installation of a frost protection machine can restore economic losses of 30 million yuan. The price of each anti-frost machine is about 8,000 yuan, and the effective anti-frost area is 1.5 mu. The service life is 10 years. The product is still calculated in 5% of the entire tea plantation area in the province. The annual sales can reach 24 million yuan. Therefore, the anti-frosting machine has broad prospects for promotion, and the market potential of the anti-frost equipment industry is huge.
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